WO2022203135A1 - Injection pressure opening/closing control type hot runner valve device - Google Patents

Injection pressure opening/closing control type hot runner valve device Download PDF

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Publication number
WO2022203135A1
WO2022203135A1 PCT/KR2021/012120 KR2021012120W WO2022203135A1 WO 2022203135 A1 WO2022203135 A1 WO 2022203135A1 KR 2021012120 W KR2021012120 W KR 2021012120W WO 2022203135 A1 WO2022203135 A1 WO 2022203135A1
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WO
WIPO (PCT)
Prior art keywords
resin
gate
pressure
runner
valve device
Prior art date
Application number
PCT/KR2021/012120
Other languages
French (fr)
Korean (ko)
Inventor
김혁중
Original Assignee
김혁중
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Filing date
Publication date
Priority claimed from KR1020210118301A external-priority patent/KR102522069B1/en
Application filed by 김혁중 filed Critical 김혁중
Publication of WO2022203135A1 publication Critical patent/WO2022203135A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/20Injection nozzles
    • B29C45/23Feed stopping equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels ; Runner channels or runner nozzles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels ; Runner channels or runner nozzles
    • B29C45/28Closure devices therefor

Definitions

  • the present invention relates to an injection pressure opening/closing control type hot runner valve device, and more particularly, enabling the opening/closing operation of the gate by automatically controlling the lifting piston by the injection pressure and pressure balancing action of the injection cylinder. It relates to an injection pressure opening/closing control type hot runner valve device that can ensure stable and accurate gate opening/closing operation regardless of low resin pressure or low speed.
  • an injection molding machine for molding plastic products injects a resin raw material from a mold cylinder in which the resin is melted into the manifold, and the injected resin is evenly distributed along the resin flow path branched in the manifold and is coupled to the lower part of the manifold. It is a device that is supplied to one or more nozzles, respectively, and is injected into the molding space, that is, the cavity formed by the upper and lower cores, which are product molding molds.
  • This injection molding machine is configured to open and close the gate, that is, the outlet by the lifting operation of the valve pin.
  • a manifold type that receives resin through the manifold is used.
  • single type is used in case of single product production.
  • FIG. 1 is a cross-sectional view showing a hot runner valve device for an injection molding machine having a structure for elevating a valve pin by using air as an operating pressure according to the prior art, and includes a driving unit 100 and a valve device 200 .
  • the driving unit 100 has a plurality of air channels 110 and 120 that are conduits for supplying and discharging high-pressure air from the outside, and the plurality of air channels 110 and 120 are formed.
  • the piston 140 in the cylinder 130 is lifted up and down by the high-pressure air selectively introduced through the.
  • the lower end of the piston 130 has a structure in which the valve pin 210 is connected and interlocked.
  • the valve pin 210 has a structure that selectively blocks or opens a gate, ie, an outlet, which forms the front end of the nozzle 220 by being raised and lowered in conjunction with the piston 130 .
  • the valve device 200 includes a nozzle 220 on which a heater is wound to form an outer body to prevent solidification of the resin, and the valve pin 210 is vertically disposed inside the nozzle 220. It is a structure that is installed to achieve elevation.
  • the nozzle 220 has a resin channel 230 formed with a predetermined gap around the valve pin 210 , and both ends of the resin channel 230 are the outlet of the nozzle and the resin channel of the manifold 300 . It is a structure connected to each of the 310.
  • valve device for a multi-cavity mold injection molding machine having this configuration, when a high-pressure operating pressure is selectively supplied through the air channels 110 and 120, the piston 140 rises or falls, and at the same time, the valve pin 210 interlocks.
  • the lifting operation is performed integrally. Accordingly, as the piston 140 moves up and down, the outlet of the nozzle is opened or blocked, so that the resin supplied through the manifold 300 is supplied or blocked into the mold through the outlet.
  • the present applicant combined the supply action pressure of the resin supplied to the inside of the nozzle and the return element through Republic of Korea Patent Registration No. 10-1290549 to link the lifting operation to the lifting pin, and the lifting and lowering of the lifting pin
  • a driving means consisting of a hydraulic/pneumatic cylinder of a complicated structure, a forward/reverse motor or an actuator, etc.
  • a hot runner valve device for injection molding machines that can improve the degree of freedom of application and installation to molds through volume reduction.
  • the present applicant has proposed an improved hot runner valve device through Korean Patent No.
  • the runner valve device does not require a driving means of a complicated structure for opening and closing the gate of the nozzle, and can maintain good flowability of the resin as the opening and closing of the gate is interrupted by the runner pin. It is possible to create favorable molding conditions for resin as well.
  • the hot runner valve device according to the prior art is a small part and in the case of a molded product requiring precision, for example, in the case of a gear, the overall balance is very important, so it is ideal to supply resin at various points to the cavity, which is the molding space, and mold it.
  • the volume of the hot runner valve device there is a structural disadvantage that it is impossible to supply the resin at several points for a small molded product.
  • the hot runner valve device previously applied by the present applicant controls the resin supply to the cavity by using the solidification phenomenon of the resin.
  • the mass productivity of the molded product was lowered due to disadvantages such as the resin was not completely solidified and flowed down at the time when the supply had to be cut off, or the resin was not completely melted at the time of supplying the resin, so it was delayed.
  • the present invention is to solve the problems of the prior art, and an object according to an exemplary embodiment of the present invention is that when an injection pressure is generated in an injection cylinder, the lifting piston provided in the nozzle moves downward to temporarily open the gate locally. Then, by the injection pressure acting on the lower part of the lifting piston, the elastic force of the return spring is overcome and the gate is fully opened so that the resin is supplied to the cavity of the mold. As the pressure is balanced in the upper and lower spaces of the piston, the lifting piston moves down and down by the restoring force of the return spring naturally to close the gate, thereby ensuring stable and automated gate opening and closing operation. To provide a runner valve device.
  • An object of the present invention is to provide an injection pressure opening/closing control type hot runner valve device that does not require complicated parts for opening and closing the gate because of its configuration, and has a simple structure, which can increase the convenience and economical efficiency of maintenance.
  • the present invention forms a solidified region in which a small amount of resin can stay and solidify by cutting a part of the gate fin, which is the tip of the lifting piston in a state where the gate is blocked, and the solidified resin remaining in the solidified region is
  • An object of the present invention is to provide an injection pressure opening/closing control type hot runner valve device capable of improving the precision and reliability of operation by preventing the resin from flowing in a blocked state and allowing it to be easily removed when the injection pressure is applied.
  • an object according to another embodiment of the present invention is that in the case of a hot runner valve device applied to a multi-cavity mold, each valve device is controlled to open sequentially with a time difference in a state in which the valve devices are connected and installed at intervals in a single mold cavity, at this time
  • the valve device of one embodiment is configured to start supplying resin to the cavity first among several valve devices receiving resin from the injection cylinder, the valve device at the next position is temporarily lowered by the resin pressure of the injection cylinder therein.
  • the gate is locally opened and the gate is fully opened by rising by the resin pressure acting on the cavity side injected by the valve device of the above embodiment.
  • the object of the present invention is to provide a hot runner valve device that has a relatively simple structure and can stably implement sequence control for multi-cavity molds by shielding the gate as the lifting piston descends by the return spring as the resin pressure in the nozzle and the nozzle are balanced.
  • the first embodiment of the present invention for realizing the above object is a resin passage through which the molten resin passes to the inner center and a body in which an expansion space is formed by extending the resin passage, and the resin is provided inside the lower part of the body a nozzle composed of a runner cylinder having a runner part provided with an outlet through which resin is discharged while having a reduced diameter at a lower side of the nozzle to receive and guide;
  • a pressure acting part that is provided to be raised and lowered inside the runner cylinder and a lowering force is applied by the inflow pressure of the resin on the upper part, and a connection part and this connection part connected to the lower side of the pressure acting part to form a passage through which the resin passes, and this connection part elevating and lowering having a gate pin extending from the center of piston;
  • the upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw formed on one side of the runner cylinder, and the upper end of the pressure applying part is in contact with a
  • a second preferred embodiment of the present invention for realizing the above object is a body in which a resin passage through which the molten resin passes to the inner center and an expansion space formed by extending the resin passage are connected, and the upper end part inside the lower part of the body is connected and assembled, a nozzle comprising a runner cylinder comprising a runner part provided with an outlet for discharging the resin, the lower part of which is formed by reducing diameters on the upper and lower sides, respectively, and formed with stepped and locking jaws;
  • the runner cylinder is raised and lowered inside the runner cylinder, and the upper part has a pressure-acting part on which a descending force is applied by the inflow pressure of the resin, and the pressure-acting part is extended with a reduced diameter to the lower side so that the resin passes through the side and is discharged.
  • a discharge passage is formed, and the lower surface thereof extends with a reduced diameter from the center of the discharge portion and the discharge portion caught by the locking jaw when descending, is disposed on the runner portion, and the end portion opens and closes the gate by lifting and lowering displacement.
  • an elevating piston having a gate fin forming a rising chamber between the runner and the runner; The upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw, and a return spring that applies an elastic force in the downward direction when the lifting piston is raised by contacting the upper end of the pressure applying part. characterized by it.
  • the lifting piston has a pressure acting portion having an inclined surface for inducing the resin pressure to act by forming a descending chamber, which is a space in which the diameter decreases while proceeding downward; a tubular member connected with a reduced diameter at the lower portion of the pressure-acting part, and a connection part for forming one or a plurality of passages radially around a concentric circle to allow the resin of the descending chamber to move;
  • An ascending chamber is formed around it by extending long from the lower center of the connection part and being disposed on the runner part, and the end part is positioned to shield the gate of the mold module and selectively opened by the lifting operation when the resin pressure is applied
  • the runner cylinder is connected to the lower part of the body by screwing, and the inner diameter is formed to have a diameter corresponding to the expansion space, and the inner upper side reduces the diameter so that the lower end of the return spring is caught.
  • a tubular barrel part having a stepped step;
  • a runner part extending integrally to the lower part of the barrel and having a relatively reduced diameter to form a rising chamber that is a space between the gate pin and a runner part connected to one side of the gate of the mold module; have.
  • the nozzle is a tubular member penetrating up and down, and a resin passage is formed on the upper part to receive resin and flow, and the diameter of the resin furnace is expanded to the lower side of the resin furnace.
  • the gate fin has a size to shield the gate at the lower end and is composed of a runner tip having a vent hole formed between the gate and the gate in a direction perpendicular to the side.
  • the gate is opened and closed by elevating the lifting piston only with the resin pressure and the return spring of the injection cylinder without a separate driving source, so economical manufacturing and installation and maintenance convenience according to the simplification of the structure are excellent. That is, when the injection pressure is applied to the inside of the nozzle, the injection pressure is preferentially applied to the upper part of the lifting piston, which causes the gate to temporarily lower and at the same time to temporarily open the gate. As a result, the gate is closed by moving the lifting piston down by the elastic support force of the return spring due to the pressure balance inside the nozzle when the filling of the cavity is completed. There is an advantage in that the opening operation for the valve can be performed quickly and accurately by interlocking the injection pressure.
  • each valve device disposed in each cavity automatically opens and closes the gate by the pressure equalization action when the resin filling is completed, so the precision of the mold holding time or injection timing is It has a useful effect that can greatly increase the convenience and efficiency of injection operation because it enables stable and accurate resin supply, blocking, and holding pressure to the cavity of the entire mold without management, technology, or equipment.
  • FIG. 1 is a cross-sectional view showing a hot runner valve device according to the prior art
  • FIG. 2 is a cutaway perspective view showing the internal structure of the first embodiment of the present invention.
  • 5 to 7 are cross-sectional views for explaining the operation in the first embodiment
  • FIG 8 is an excerpted perspective view of the lifting piston according to the first embodiment
  • FIG. 13 is a cutaway perspective view showing the internal structure of a second embodiment of the present invention.
  • 15 to 17 are cross-sectional views for explaining the operation of the second embodiment
  • expansion space 13 housing 15: heater
  • stepped jaw 33 runner part 33a: locking jaw
  • connection part 53h connection part 53h: passage 54: discharge part
  • discharge passage 55 gate pins a, b: upper and lower spaces
  • FIGS. 1 to 12 an injection pressure opening/closing control type hot runner valve device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 12 .
  • the gate is automatically closed by pressure equalization even without precisely managing the holding pressure time of the mold.
  • the setting can prevent the occurrence of defects in the molded product.
  • FIG. 2 is a perspective view showing the internal structure of the present invention.
  • a resin passage 11b through which the molten resin passes is formed in the center of the drawing, and an expansion space 11a is formed by expanding the diameter below the resin furnace 11b, and the lower end thereof is a gate (g).
  • a nozzle 10 formed by a nozzle 10 having a body 11 connected to one side of the mold module m, and the nozzle 10 is assembled and integrally connected by screwing inside the nozzle 10, the inside of which is the expansion
  • a runner cylinder 30 connected to one side of the mold module m on which the gate g is formed by forming a flow path (unsigned) with a diameter corresponding to the space 11a, and the runner cylinder 30 It is provided in the inside of the and linked up and down by the action pressure of the resin.
  • the gate (g) of the mold module (m) is shielded, the gate (g) is temporarily lowered by the supply of the resin pressure, and the gate (g) is opened to equalize the internal pressure.
  • the lifting piston 50 moves upward, the cavity of the mold module (m) ( When the resin injection for c) is completed and pressure equilibrium occurs, the injection pressure opening/closing control type hot runner valve device ( 1) is shown.
  • FIG. 3 is an exploded perspective view of the injection pressure opening/closing control type hot runner valve device of the present invention viewed from the upper side
  • FIG. 4 is an exploded perspective view viewed from the lower side.
  • a tubular body 11 having a resin furnace 11b and an expansion space 11a formed therein as an outer body is provided to surround the outer surface of the body 11 to prevent the resin from solidifying
  • a nozzle 10 comprising a heater 15 and a housing 13 which is a cover element surrounding the outer surface of the heater 15, and the nozzle 10 is assembled by screwing on the lower side of the nozzle 10, and the resin is supplied to the lower side.
  • a tubular runner cylinder 30 with an empty interior to guide, and a slide contact with the inside of the runner cylinder to ascend and descend.
  • the elevating piston 50 which performs a lifting operation so that the gate pin 55 opens and closes the gate g of the mold module m, and the lowering elastic support force for the lifting piston installed inside the nozzle and moved upward
  • An injection pressure opening/closing control type hot runner valve device 1 composed of an acting return spring 20 is shown.
  • FIG. 5 is a longitudinal cross-sectional view showing the internal structure of the present invention.
  • a body 11 having a tubular shape that is penetrated up and down and has a hollow inside, and a resin furnace 11b is formed on the upper side of the inside, and an expansion space 11a that is relatively enlarged in diameter is formed on the lower side of the body 11 and a heater 15 provided to surround the outer surface of the body 11 and heating to prevent the resin from solidifying, and a housing 13 that is a cover element that surrounds the heater 15 so that the heater 15 is not exposed to the outside.
  • a runner cylinder 30 comprising a barrel part 31 having a stepped step 31a on which the lower end of the return spring 20 is caught, and a runner part 33 extending from the lower part of the barrel part 31 to have a reduced diameter.
  • runner cylinder 30 which is provided so as to be able to ascend and descend while in sliding contact with the interior of the runner cylinder 30, and is provided with a descending chamber (a) for generating descending force by resin pressure in the upper part, and the ascending force by the resin pressure in the lower part. It is provided with a rising chamber (b) for generating a rising chamber (b) and is connected to the lower side of the pressure acting portion 51 and the pressure acting portion 51 to form a passage 53h through which the resin is moved.
  • the connection part 53 and the connection part 53 are extended from the center of the lower part to form a rising chamber (b) between the runner part 33 and the end of the mold module (m) gate (g).
  • An injection pressure opening/closing control type hot runner valve device 1 composed of a lifting piston 50 made of a gate pin 55 to open and close is shown.
  • FIG. 6 is a longitudinal cross-sectional view for explaining the primary gate open state of the present invention.
  • the lifting piston 50 is displaced in the downward direction as the resin pressure acts on the pressure acting part 51 of the lifting piston 50 installed inside the nozzle 10, and , as shown in the drawing, the gate g is temporarily opened by protruding downward based on the gate g of the mold module m. That is, since the resin pressure acting on the lowering chamber (a) is large at the starting point at which the injection pressure of the injection cylinder acts, the configuration for moving the lifting piston 50 down is shown.
  • FIG. 7 is a longitudinal cross-sectional view for explaining the secondary gate open state.
  • the resin pressure acting on the descending chamber (a) following FIG. 6 is applied to the ascending chamber (b) through the passage (53h) formed in the runner cylinder (30) of the lifting piston (50).
  • the gate When (g) is temporarily opened, the amount of the resin pressure acting on the ascending chamber (b) is relatively large compared to the resin pressure acting on the descending chamber (a), so the lifting piston 50 moves upward to the gate.
  • (g) is shown the configuration to achieve a fully open state.
  • FIG. 8 is a perspective view showing an excerpt of the lifting piston of the present invention.
  • a plurality of passages (53h) radially centered on a concentric circle at the lower portion having a pressure acting portion 51 provided in a tubular shape on the upper portion and a diameter reduced to the lower side of the pressure applying portion 51 are penetrated.
  • a connecting portion 53 and a elevating piston ( 50) is shown.
  • FIGS. 5 to 7 are rendered images of FIGS. 5 to 7
  • FIG. 12 is a view for explaining a gate opening/closing operation of the present invention.
  • the injection pressure opening/closing control type hot runner valve device according to the present invention may be used in a multi-type valve device connected to a manifold so that it can be used in a multi-cavity mold, or it may be used as a single type used in a single cavity, Since this may be performed by a known technique, a detailed description thereof will be omitted.
  • the nozzle 10 is an element for receiving resin from the injection cylinder and guiding it to the cavity side of the mold. And it is composed of a housing 13 configured to surround the heater (15).
  • the body 11 is provided as a tubular member penetrating up and down, the upper part is opened to receive the resin in the molten state from the injection cylinder, and the inner center is the resin supplied by forming the resin furnace 11b. It provides a passage through which the resin furnace 11b moves, and the lower side of the resin furnace 11b is formed by extending the diameter with respect to the resin furnace 11b, and is an extended space that is a space in which the return spring 20 and the runner cylinder 30 are installed. (11a) is formed.
  • the heater 15 is provided to surround the outer surface of the body 11 and is an element that generates heat by receiving power from the outside, and by heating the resin flowing inside the body 11 to maintain a molten state, the resin It serves to prevent the solidification of
  • the housing 13 is a metal tube-shaped accommodation member that surrounds the heater 15 so as not to be exposed to the outside.
  • the nozzle 10 of this configuration may be implemented by a known technique, and its material or shape may be appropriately modified and implemented.
  • the runner cylinder 30 is integrally connected to the lower part of the body 11 and is a connecting pipe element for receiving the resin passing through the resin furnace 11b, and corresponds to the expansion space 11a of the body 11.
  • the ball part 31 is provided with an upper outer surface connected to the lower part of the body 11 constituting the nozzle 10 by screwing, and a space corresponding to the expansion space 11a of the body 11 inside. It is a tubular member in which a stepped jaw 31a is formed by reducing the diameter so that the lower end of the return spring 20 is caught on the inner upper side.
  • the runner part 33 is integrally provided under the barrel part 31 and has a relatively reduced diameter to form a rising chamber b in the space between the runner part and the gate fin 55, , a member whose lower end is connected to one side of the gate g of the mold module m.
  • the runner part 33 forms a locking jaw (unsigned) at the reduced diameter portion of the ball part 31, which restricts movement so that the lifting piston 50, which will be described later, does not descend any further. perform the role
  • the elevating piston 50 is an element that selectively shields the gate g of the mold module m by being elevatingly provided inside the runner cylinder 30, and this elevating piston 50 is largely a pressure acting part. 51 , a connection part 53 , and a gate pin 55 .
  • the pressure acting part 51 forms an inclined surface 51a having a shape in which the diameter is gradually reduced while proceeding downward so that a descending force is applied by the inflow pressure of the resin supplied via the resin furnace 11b to the upper part.
  • the pressure acting part 51 is provided in a hollow tubular shape so that the resin flows therein, and a descending chamber (a) is formed, which is a space in which the diameter is reduced while proceeding downward from the upper side of the inside based on the drawing.
  • the inclined surface 51a is formed to do this, and the molten resin supplied from the resin furnace 11b acts as a descending force as the flow is rapidly reduced in the descending chamber (a) section of the pressure acting part 51 .
  • connection part 53 is configured to form a passage 53h extending downwardly based on the drawing on the lower side of the pressure acting part 51 and penetrating vertically so that the resin passes in the downward direction.
  • this connection part 53 is a tubular member that is connected with a reduced diameter at the lower part of the pressure acting part 51, and one or a plurality of passages ( 53h), the resin acting on the lowering chamber (a) moves through this passage (53h).
  • the gate pin 55 extends from the center of the connection part 53 and is disposed on the runner part 33, and the lower end thereof selectively opens and closes the gate g of the mold module m by a lifting operation. As such, it is configured to form an ascending chamber (b) that is a space between the runner part (33) and the runner part (33). When the lifting chamber (b) acts on the resin pressure, the lifting force is generated and the lifting piston 50 moves upward.
  • the gate fin 55 in the present invention extends long from the lower center of the connection part 53 and is disposed in the center of the runner part 33, which is a space filled with resin around it.
  • a chamber (b) is formed, and an end portion thereof is positioned to shield the gate of the mold module (m) and selectively opens and closes the gate (g) by a lifting operation when the resin pressure is applied.
  • the gate pin 55 has a size to shield the gate g of the mold module m at the lower end, and has a ventilation hole processed in the form of a slit between the gate g and the gate g in the direction perpendicular to the side. 55s). At this time, in the ventilation hole 55s, the lifting piston 50 should easily perform a lowering operation by the pressure of the resin supplied from the injection cylinder, but the resin around the gate pin 55 and the gate g is solidified.
  • vent hole (55s) that is a gap to the extent that the resin in the ascending chamber (b) does not flow down, so that this part can easily burst when the initial resin pressure is applied.
  • the return spring 20 has an upper end hooked on the upper part of the expansion space 11a of the nozzle 10 and a lower end hooked with a stepped jaw 31a formed on one side of the inner side of the runner cylinder 30, and the pressure action
  • the lifting piston 50 When the lifting piston 50 is raised by the upper end of the part 51 in contact, it serves to apply an elastic force in the downward direction. That is, when no injection pressure is applied to the lifting piston 50, the return spring 20 is caught on the stepped jaw 31a and acts as an elastic support force so that the lifting piston 50 does not move upward.
  • the resin pressure from the injection cylinder acts on the pressure acting portion 51 of the lifting piston 50, the state is maintained in the state of being caught by the stepped jaw 31a.
  • the lifting piston 50 overcomes the elastic support force of the return spring 20 and moves upward.
  • the fully open state for the gate (g) is maintained.
  • the return spring 20 in the contracted state by the upward movement of the lifting piston 50 is elastic.
  • the lifting piston 50 is moved down by the restoring force to return the gate g to the shielded position.
  • the nozzle 10 forms a state in which the gate pin 55 of the lifting piston 50 shields the gate g of the mold module m in the injection standby state.
  • the resin enters the expansion space 11a through the resin furnace 11b. is brought in
  • the resin introduced into the expansion space 11a in this way flows into the pressure acting part 51 of the lifting piston 50 provided to be able to ascend and descend inside the runner part 33 and acts a descending pressure, thereby applying a descending pressure. 50) temporarily descends as shown in FIG. 6 to form a state in which a part of the gate g is opened.
  • injection pressure opening/closing control type hot runner valve device according to a second embodiment of the present invention will be described with reference to FIGS. 13 to 17, but the injection pressure opening/closing control type hot runner valve device according to this embodiment is the same as the one described above.
  • the same reference numerals are assigned to the components performing the operation, and the redundant description of each component will be omitted or briefly described.
  • FIG. 13 is a cut-away perspective view showing the internal structure of the second embodiment of the present invention.
  • a hollow tubular shape, a resin passage 11b through which the molten resin passes is formed in the upper part of the inner center, and an expanded space 11a formed by expanding the diameter is formed on the lower side of the resin passage 11b.
  • the body 11 and the runner cylinder 30 connected to the gate g of the mold module m by providing a conduit corresponding to the expansion space 11a as assembled and connected to the open lower part of the body 11 ), and a lifting piston (50) that is provided inside the runner cylinder (30) and is elevating and interlocking by the resin pressure acting on the upper and lower sides by the action pressure of the resin acting from the injection cylinder (50) And, it is provided in the extension space (11a) of the body (11), the upper end of which is supported by being caught on the upper part of the extension space (11a), and the lower end of the stepped jaw (31a) provided on the inner upper side of the runner cylinder (30)
  • the injection pressure opening/closing control type hot runner valve device 1 made of a return spring 20 acting as
  • a tubular body 11 having a resin furnace 11b and an expansion space 11a formed therein as an outer body is provided to surround the outer surface of the body 11 to prevent the resin from solidifying
  • a nozzle 10 consisting of a heater 15 and a housing 13 that is a cover element surrounding the outer surface of the heater 15, and the nozzle 10 are assembled by screwing at the lower side of the nozzle 10, and the resin is supplied and guided to the lower side
  • FIG. 15 to 17 are cross-sectional views for explaining the operation of the second embodiment.
  • FIG. 16 is a state in which the gate g of the mold module m is shielded
  • FIG. 17 is the lifting piston 50 temporarily descending. to show a state in which the gate g of the mold module m is temporarily opened
  • FIG. 18 shows the resin for the cavity of the mold by upward displacement by the resin pressure acting on the descending chamber a of the lifting piston 50. It shows a state in which charging is performed, that is, a state in which the gate g is fully opened.
  • Figure 18 is a rendered image diagram to help the understanding of the drawings of Figures 15 to 17,
  • Figure 19 is the configuration of the first embodiment is arranged as the first injection valve device, the configuration of the second embodiment is described above It is a view exemplifying the configuration of the second and subsequent valve devices that perform the operation in conjunction with the injection operation of the valve device of the first embodiment.
  • the return spring 20 installed in the expansion space 11a of the nozzle 10 to apply an elastic support force in the downward direction, and the return spring 20 connected to the lower side of the body 11 and assembled on the inner upper side of the return spring 20
  • a runner cylinder 30 comprising a barrel portion 31 having a stepped step 31a on which the lower end is caught and a runner portion 33 extending from the lower portion of the barrel portion 31 to have a reduced diameter, and the runner cylinder (30) is provided so as to be able to ascend and descend while in
  • An injection pressure opening/closing control type hot runner valve device 1 composed of a lifting piston 50 made of a pin 55 is shown.
  • the body 11 the runner cylinder 30, the lifting piston 50, and the return spring It consists of (20).
  • the nozzle 10 is an element for receiving resin from the injection cylinder and guiding it to the cavity side of the mold. 15) and a housing 13 configured to surround the heater 15 .
  • the body 11 is provided as a tubular member penetrating up and down, and the upper part is opened to receive the resin in the molten state from the injection cylinder, and the inner center is the resin furnace 11b. It is provided to provide a passage through which the supplied resin is moved, and a return spring 20 and a runner cylinder 30 are formed by expanding the diameter with respect to the resin furnace 11b on the lower side of the resin furnace 11b.
  • ) is a configuration in which an extended space 11a, which is a space to be installed, is formed.
  • the heater 15 is provided to surround the outer surface of the body 11 and receives power from the outside to generate heat so that the resin flowing therein is not solidified and maintained in a molten state, and the housing Reference numeral 13 denotes a member that protects the heater 15 from being exposed to the outside.
  • the runner cylinder 30 is assembled with the upper end connected to the lower inner side of the body 11 by screwing, and on the inner upper and lower sides, a stepped protrusion 31a and a locking protrusion 33a are formed by reducing diameters, respectively, and , is a configuration consisting of a runner portion 33 provided with an outlet (33b) to the lower portion of the resin is discharged. Since the runner cylinder 30 is substantially the same as the configuration of the first embodiment described above, a detailed description thereof will be omitted. However, in the present invention, the runner cylinder 30 is exemplified by screwing to the lower part of the body 11 in consideration of workability and assembling property, but may be provided integrally if integrally processing and molding is possible.
  • the lifting piston 50 has a feature different from that of the first embodiment described above in part of its technical configuration. As an element selectively shielding the gate g of the mold module m by the .
  • the pressure acting part 51 forms an inclined surface 51a having a shape in which the diameter is gradually reduced while proceeding downward so that a descending force is applied by the inflow pressure of the resin supplied via the resin furnace 11b to the upper part.
  • the pressure acting part 51 is provided in a hollow tubular shape so that the resin flows therein, and a descending chamber (a) is formed, which is a space in which the diameter is reduced while proceeding downward from the upper side of the inside based on the drawing.
  • the inclined surface 51a is formed to do this, and the molten resin supplied from the resin furnace 11b acts as a descending force as the flow is rapidly reduced in the descending chamber (a) section of the pressure acting part 51 .
  • the discharge part 54 is extended with a reduced diameter downward of the pressure acting part 51 , and the resin of the pressure acting part 51 passes in the horizontal, ie, side direction, based on the drawing to pass through the rising chamber (b). ) to form a discharge passage (54h) to flow to the side, and the lower surface is an element caught by the locking jaw (33a) when descending.
  • one or a plurality of the discharge passages 54h may be formed on the side surface.
  • the gate pin 55 extends downward from the center of the discharge part 54 in a straight line and is disposed on the runner part 33, and the lower end thereof is selectively disposed on the gate of the mold module m by a lifting operation.
  • This gate pin 55 is configured to form an ascending chamber b, which is a space, between the runner part 33, and when a resin pressure is applied to the ascending chamber b, a lifting force is generated and the lifting piston (50) makes an upward movement.
  • the gate fin 55 in the present invention extends long from the lower center of the connection part 53 and is disposed in the center of the runner part 33, which is a space filled with resin around it.
  • a chamber (b) is formed, and an end portion thereof is positioned to shield the gate of the mold module (m) and selectively opens and closes the gate (g) by a lifting operation when the resin pressure is applied.
  • the return spring 20 has an upper end hooked on the upper part of the expansion space 11a of the nozzle 10 and a lower end hooked with a stepped jaw 31a formed on one side of the inner side of the runner cylinder 30, and the pressure action When the lifting piston 50 is raised by the upper end of the part 51 in contact, it serves to apply an elastic force in the downward direction.
  • the nozzle 10 forms a state in which the gate pin 55 of the elevating piston 50 shields the gate g of the mold module m in the injection standby state as shown on the left side of the drawings in FIGS. 15 and 18 .
  • the resin in the molten state from the injection cylinder acts on the pressure acting part 51 of the lifting piston 50 via the resin furnace 11b of the body 11 constituting the nozzle 10, , as shown in the drawings located in the middle of FIGS. 16 and 18 as the downward pressure by the resin pressure acts on the lifting piston 50, it temporarily descends to open a part of the gate g of the mold module m. form a state
  • FIG. 19 shows the arrangement and configuration of the main valve device (main) that first receives the resin through the injection cylinder and the manifold in the first embodiment of the present invention, and then the second (sub1), the third (sub1), etc. shows the arrangement of the valve device of the second embodiment of the present invention, and STEP1, located at the top of the drawing, is supplied with resin to the valve device (main) of the first embodiment located at the leftmost side of the mold. shows the state in which injection of the resin into the cavity of As the resin supply pressure acts on the inside, each gate fin maintains a temporarily lowered state.
  • the resin injected through the valve device (main) of the first embodiment flows in and flows into the cavity space side to which the valve device (sub1) of the second embodiment is disposed close to one side, at this time
  • the gate fin 55 is temporarily moved upward.
  • the resin injected into the cavity of the mold passes through (sub1), and at the same time, the gate pin 55 of (sub1) performs a full upward operation, opens the gate, and supplies the resin to the cavity of the mold. , the resin passing through (sub1) flows to the cavity side connected to (sub2) disposed on one side thereof.
  • STEP5 shows the state in which the resin filling of the cavity of the mold is completed.
  • (main), (sub1), and (sub2) are the total pressure inside the nozzle and the pressure equilibrium with the inside of the cavity of the mold, so that the return spring The lifting piston moves down by the restoring force, thereby forming a state in which the gate is blocked.
  • STEP6 shows the state of the nozzle at the time of taking out the molded article molded from the cavity of the mold.

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Abstract

The present invention provides a gate opening/closing type hot runner valve device using resin pressure. The present invention provides an injection pressure opening/closing control type hot runner valve device which enables an up-down piston to be automatically controlled to be moved up or down by pressure equilibrium action with injection pressure of an injection cylinder to enable an opening/closing operation with respect to a gate, and ensures a stable and accurate gate opening/closing operation regardless of a case in which pressure of resin is low or the speed of the same is low.

Description

사출압 개폐 제어형 핫런너 밸브장치Injection pressure opening/closing control type hot runner valve device
본 발명은 사출압 개폐 제어형 핫런너 밸브장치에 관한 것으로서, 더욱 상세하게는 사출실린더의 사출압과 압력평형 작용에 의해 승강피스톤을 자동으로 승강 제어되도록 하여 게이트에 대한 개폐 동작을 가능하게 하고, 아울러 수지의 압력이 낮거나 저속인 경우에도 관계없이 안정적이고 정확한 게이트 개폐 동작을 보장할 수 있는 사출압 개폐 제어형 핫런너 밸브장치에 관한 것이다.The present invention relates to an injection pressure opening/closing control type hot runner valve device, and more particularly, enabling the opening/closing operation of the gate by automatically controlling the lifting piston by the injection pressure and pressure balancing action of the injection cylinder. It relates to an injection pressure opening/closing control type hot runner valve device that can ensure stable and accurate gate opening/closing operation regardless of low resin pressure or low speed.
일반적으로 플라스틱 제품을 성형하는 사출성형기는 수지를 용융한 형체 실린더로부터 수지원료를 매니폴드로 주입시키고, 주입된 수지는 매니폴드 내에 분기 형성된 수지유로를 따라 균등하게 분배되어 매니폴드의 하부에 결합된 하나 이상의 노즐로 각각 공급되어 제품 성형틀인 상·하 코어가 형성하는 성형공간 즉, 캐비티로 주입하는 장치이다. 이러한 사출성형기는 밸브핀의 승강 동작에 의해 게이트 즉, 출구를 개폐하도록 구성되어 며, 성형품의 수량에 따라 비교적 여러 개를 일시에 성형하는 경우에는 매니폴드를 통해 수지를 공급받는 매니폴드형이 사용되고, 단품 생산을 하는 경우에는 싱글형이 사용된다.In general, an injection molding machine for molding plastic products injects a resin raw material from a mold cylinder in which the resin is melted into the manifold, and the injected resin is evenly distributed along the resin flow path branched in the manifold and is coupled to the lower part of the manifold. It is a device that is supplied to one or more nozzles, respectively, and is injected into the molding space, that is, the cavity formed by the upper and lower cores, which are product molding molds. This injection molding machine is configured to open and close the gate, that is, the outlet by the lifting operation of the valve pin. In the case of molding relatively several pieces at once depending on the number of molded products, a manifold type that receives resin through the manifold is used. , single type is used in case of single product production.
도 1은 종래 기술에 따른 공기를 작동압으로 하여 밸브핀을 승강시키는 구조를 가진 사출성형기용 핫런너 밸브장치를 나타낸 단면도로서, 구동부(100)와 밸브장치(200)로 구성된다. 상기 종래의 핫런너 밸브장치에서 구동부(100)는 외부로부터 고압의 공기(Air)를 공급 및 배출하기 위한 관로인 에어채널(air chnnel;110,120)이 복수개 형성되어 있으며, 이 복수개의 에어채널(110,120)을 통해 선택적으로 유입되는 고압의 공기에 의해 실린더(130)내의 피스톤(140)이 승강을 이루는 구조이다. 이때, 상기 피스톤(130)의 하단에는 밸브핀(210)이 연결되어 연동되는 구조이다. 그리고, 상기 밸브핀(210)은 피스톤(130)에 연동하여 승강 됨으로써 노즐(220)의 선단부를 형성하는 게이트 즉, 출구를 선택적으로 차단 또는 개방하는 구조이다. 1 is a cross-sectional view showing a hot runner valve device for an injection molding machine having a structure for elevating a valve pin by using air as an operating pressure according to the prior art, and includes a driving unit 100 and a valve device 200 . In the conventional hot runner valve device, the driving unit 100 has a plurality of air channels 110 and 120 that are conduits for supplying and discharging high-pressure air from the outside, and the plurality of air channels 110 and 120 are formed. ), the piston 140 in the cylinder 130 is lifted up and down by the high-pressure air selectively introduced through the. At this time, the lower end of the piston 130 has a structure in which the valve pin 210 is connected and interlocked. In addition, the valve pin 210 has a structure that selectively blocks or opens a gate, ie, an outlet, which forms the front end of the nozzle 220 by being raised and lowered in conjunction with the piston 130 .
한편, 상기 밸브장치(200)는 외체를 형성하는 것으로 수지의 고화를 방지하기 위한 히터가 권선되는 노즐(220)를 포함하며, 이 노즐(220)의 내부에는 밸브핀(210)이 수직방향으로 승강을 이루도록 설치되는 구조이다. 여기서, 상기 노즐(220)은 밸브핀(210)의 주위로 일정한 간극을 두고 수지채널(230)이 형성되며, 이 수지채널(230)의 양끝은 노즐의 출구와 매니폴드(300)의 수지채널(310)에 각각 연결되는 구조이다. 이러한 구성의 다캐비티 금형용 사출성형기 밸브장치는 상기 에어채널(110,120)을 통해 선택적으로 고압의 작동압이 공급되면 피스톤(140)이 승강 또는 하강을 이루게 되고, 이와 동시에 밸브핀(210) 이 연동하여 일체로 승강 동작이 수행된다. 따라서, 상기 피스톤(140)이 승강 됨에 따라 노즐의 출구를 개방 또는 차단시키게 되므로 매니폴드(300)를 통해 공급되는 수지가 출구를 통해 금형 내로 공급되거나 또는 차단되게 된다. On the other hand, the valve device 200 includes a nozzle 220 on which a heater is wound to form an outer body to prevent solidification of the resin, and the valve pin 210 is vertically disposed inside the nozzle 220. It is a structure that is installed to achieve elevation. Here, the nozzle 220 has a resin channel 230 formed with a predetermined gap around the valve pin 210 , and both ends of the resin channel 230 are the outlet of the nozzle and the resin channel of the manifold 300 . It is a structure connected to each of the 310. In the valve device for a multi-cavity mold injection molding machine having this configuration, when a high-pressure operating pressure is selectively supplied through the air channels 110 and 120, the piston 140 rises or falls, and at the same time, the valve pin 210 interlocks. The lifting operation is performed integrally. Accordingly, as the piston 140 moves up and down, the outlet of the nozzle is opened or blocked, so that the resin supplied through the manifold 300 is supplied or blocked into the mold through the outlet.
그러나, 상기 종래 기술은 밸브핀을 승강시키기 위한 작동원으로 고압의 공기를 이용함에 따라 복잡한 기밀구조를 채용해야 할 뿐만 아니라 대형의 공압펌프를 필요로 함에 따라 설치공간에 많은 제약을 받을 뿐만 아니라 정비 및 유지관리면에서도 극히 불량한 단점이 있다. 특히, 노즐을 여러 개 구비하는 다 캐비티 금형에 적용되는 경우 각 노즐이 갖는 치수산포로 인해 결과적으로 각 노즐의 사출량에 편차가 발생하여 균일한 품질을 갖는 성형품의 양산이 어려운 문제점이 있었다. However, as the prior art uses high-pressure air as an operating source for elevating the valve pin, it is necessary to employ a complex airtight structure, and as it requires a large pneumatic pump, it is not only limited in installation space but also maintenance And there is an extremely poor disadvantage in terms of maintenance. In particular, when applied to a multi-cavity mold having a plurality of nozzles, there is a problem in that it is difficult to mass-produce molded products having uniform quality because the injection amount of each nozzle is consequently varied due to the dimensional dispersion of each nozzle.
이러한 문제점을 해결하기 위하여 본 출원인은 대한민국 등록특허 제10-1290549호를 통해 노즐의 내부로 공급되는 수지의 공급 작용압과 복귀요소를 조합하여 승강핀에 대한 승강 동작을 연동시키고 이 승강핀의 승강 동작에 의해 노즐의 게이트 개폐를 단속하는 구조이므로 종전의 복잡한 구조의 유공압 실린더나 정역모터 또는 액츄에이터 등으로 이루어진 구동수단을 필요로 하지 않음에 따라 구조가 간소하여 금형 설계의 자유도를 높일 수 있을 뿐만 아니라 부피감소를 통해 금형에 대한 적용 및 설치의 자유도를 개선시킬 수 있는 사출성형기용 핫런너 밸브장치를 제안한 바 있다. 또한, 상기의 사출성형기용 핫런너 밸브장치와 유사한 기술로서 본 출원인은 대한민국 등록특허 제10-1154081호 및 대한민국 등록특허 제10-1588249호를 통해 개량된 핫런너 밸브장치를 제안한 바 있으며, 이들 핫런너 밸브장치는 노즐의 게이트 개폐를 위한 복잡한 구조의 구동수단을 필요로 하지 않으면서 런너핀에 의해 게이트의 개폐가 단속됨에 따라 수지의 유동 흐름성을 양호하게 유지할 수 있으므로 유동성이 불량한 성분이 함유된 수지에 대해서도 양호한 성형조건을 조성할 수 있다.In order to solve this problem, the present applicant combined the supply action pressure of the resin supplied to the inside of the nozzle and the return element through Republic of Korea Patent Registration No. 10-1290549 to link the lifting operation to the lifting pin, and the lifting and lowering of the lifting pin As it is a structure that controls the opening and closing of the nozzle gate by operation, it does not require a driving means consisting of a hydraulic/pneumatic cylinder of a complicated structure, a forward/reverse motor or an actuator, etc. We have proposed a hot runner valve device for injection molding machines that can improve the degree of freedom of application and installation to molds through volume reduction. In addition, as a technique similar to the hot runner valve device for an injection molding machine, the present applicant has proposed an improved hot runner valve device through Korean Patent No. 10-1154081 and Korean Patent No. 10-1588249, and these hot runner valve devices The runner valve device does not require a driving means of a complicated structure for opening and closing the gate of the nozzle, and can maintain good flowability of the resin as the opening and closing of the gate is interrupted by the runner pin. It is possible to create favorable molding conditions for resin as well.
그러나, 종래 기술에 따른 핫런너 밸브장치는 소형의 부품이면서 정밀성을 요구하는 성형품의 경우 예컨대, 기어의 경우 전체적인 밸런스가 상당히 중요하므로 성형공간인 캐비티에 대하여 여러 지점에서 수지를 공급하여 성형하는 것이 이상적이지만 핫런너 밸브장치가 갖는 부피로 인해 소형의 성형품에 대해서는 여러 지점에서 수지를 공급하기란 사실 불가능한 구조적인 단점이 있다.However, the hot runner valve device according to the prior art is a small part and in the case of a molded product requiring precision, for example, in the case of a gear, the overall balance is very important, so it is ideal to supply resin at various points to the cavity, which is the molding space, and mold it. However, due to the volume of the hot runner valve device, there is a structural disadvantage that it is impossible to supply the resin at several points for a small molded product.
또한, 본 출원인이 선출원한 핫런너 밸브장치는 수지의 고화현상을 이용하여 캐비티에 대한수지공급을 단속하므로 소형의 성형품이나 또는 고정밀을 요하는 성형품 또는 수지가 갖는 점성이 지나치게 낮거나 혹은 높은 경우 수지공급을 차단하여야 하는 시점에서 수지가 완전히 고화되지 않아 흘러내리거나 또는 수지를 공급하는 시점에서 수지가 완전히 용융되지 않아 지연되는 등의 폐단으로 인해 성형품의 양산성이 떨어지는 폐단을 초래하는 문제점이 있었다.In addition, the hot runner valve device previously applied by the present applicant controls the resin supply to the cavity by using the solidification phenomenon of the resin. There was a problem in that the mass productivity of the molded product was lowered due to disadvantages such as the resin was not completely solidified and flowed down at the time when the supply had to be cut off, or the resin was not completely melted at the time of supplying the resin, so it was delayed.
본 발명은 상기 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명의 일시례에 따른 목적은 사출실린더에서 사출압을 발생시키면 노즐의 내부에 구비된 승강피스톤이 하강 동작을 하여 게이트를 일시적으로 국부 개방한 뒤 승강피스톤의 하부에 작용하는 사출압에 의해 복귀스프링의 탄성력을 극복하고 상승하여 게이트를 완전 개방시킴으로써 금형의 캐비티에 대한 수지공급이 이루어지도록 하고, 금형의 캐비티 내에 수지 충전이 완료되면 상기 승강피스톤의 상,하 공간에서 압력평형이 이루어짐에 따라 자연적으로 복귀스프링의 복원력에 의해 승강피스톤이 하강 이동되어 게이트가 폐쇄되도록 함으로써 안정적이고 자동화된 게이트의 개폐 동작을 보장할 수 있는 사출압 개폐 제어형 핫런너 밸브장치를 제공하는데 있다. 즉, 본 발명은 노즐의 내부에 사출압이 작용하면 승강피스톤이 초기 사출압에 의해 하강하여 게이트를 일시 개방시킨 상태에서 게이트를 통해 승강피스톤의 하부로 유입된 수지압에 의해 상승하여 게이트에 대한 완전 개방을 유지하고, 이어서 금형의 캐비티에 대한 수지의 충전이 완료되면 노즐 내부의 전체압력과 금형의 캐비티 내의 압력 평형이 이루어짐에 따라 복귀스프링의 복원력에 의해 승강피스톤이 하강 이동함으로써 게이트를 차단하는 구성이어서 게이트의 개폐동작을 위한 복잡한 부품을 필요로 하지 않고, 구조가 간소하여 유지관리의 편의성과 경제적성을 높일 수 있는 사출압 개폐 제어형 핫런너 밸브장치를 제공하는데 있다.The present invention is to solve the problems of the prior art, and an object according to an exemplary embodiment of the present invention is that when an injection pressure is generated in an injection cylinder, the lifting piston provided in the nozzle moves downward to temporarily open the gate locally. Then, by the injection pressure acting on the lower part of the lifting piston, the elastic force of the return spring is overcome and the gate is fully opened so that the resin is supplied to the cavity of the mold. As the pressure is balanced in the upper and lower spaces of the piston, the lifting piston moves down and down by the restoring force of the return spring naturally to close the gate, thereby ensuring stable and automated gate opening and closing operation. To provide a runner valve device. That is, according to the present invention, when the injection pressure is applied to the inside of the nozzle, the lifting piston descends by the initial injection pressure and rises by the resin pressure flowing into the lower part of the lifting piston through the gate while the gate is temporarily opened. The gate is blocked by maintaining the full opening and then, when the filling of the resin into the cavity of the mold is completed, the total pressure inside the nozzle and the pressure within the cavity of the mold are equalized, and the lifting piston moves down by the restoring force of the return spring. An object of the present invention is to provide an injection pressure opening/closing control type hot runner valve device that does not require complicated parts for opening and closing the gate because of its configuration, and has a simple structure, which can increase the convenience and economical efficiency of maintenance.
또한, 본 발명은 게이트가 차단된 상태에서 승강피스톤의 선단부인 게이트핀의 일부를 절개하여 소량의 수지가 체류하여 고화될 수 있는 고화영역을 형성하고, 이 고화 영역에 체류된 고화 수지는 게이트가 차단된 상태에서 수지가 흘러내리는 것을 방지하면서 사출압의 작용시 용이하게 탈락되도록 하여 동작의 정밀성과 신뢰성을 향상시킬 수 있는 사출압 개폐 제어형 핫런너 밸브장치를 제공하는데 있다.In addition, the present invention forms a solidified region in which a small amount of resin can stay and solidify by cutting a part of the gate fin, which is the tip of the lifting piston in a state where the gate is blocked, and the solidified resin remaining in the solidified region is An object of the present invention is to provide an injection pressure opening/closing control type hot runner valve device capable of improving the precision and reliability of operation by preventing the resin from flowing in a blocked state and allowing it to be easily removed when the injection pressure is applied.
또한, 본 발명의 다른 실시례에 따른 목적은 다캐비티 금형에 적용되는 핫런너 밸브장치의 경우 각 밸브장치는 단일의 금형 캐비티에 간격을 두고 연결 설치된 상태에서 시간차를 두고 순차 개방되도록 제어되는데, 이때 사출실린더로부터 수지를 공급받는 여러 밸브장치 중 상기 일 실시례의 밸브장치가 가장 먼저 캐비티에 대한 수지공급을 시작하도록 구성하는 경우, 다음 위치의 밸브장치는 내부에 사출실린더의 수지압에 의해 일시 하강하여 게이트를 국부 개방함과 동시에 상기 일실시례의 밸브장치가 주입한 캐비티측에서 작용하는 수지압에의해 상승하여 게이트를 완전 개방하게 되며, 이후 해당 밸브장치가 설치된 캐비티 내의 수지가 충전이 끝나면 캐비티와 노즐내의 수지압이 평형됨에 따라 복귀스프링에 의해 승강피스톤이 하강하여 게이트를 차폐시킴으로써 비교적 간소한 구조이면서 다캐비티 금형에 대한 시퀀스 제어를 안정적으로 구현할 수 있는 핫런너 밸브장치를 제공하는데 있다.In addition, an object according to another embodiment of the present invention is that in the case of a hot runner valve device applied to a multi-cavity mold, each valve device is controlled to open sequentially with a time difference in a state in which the valve devices are connected and installed at intervals in a single mold cavity, at this time When the valve device of one embodiment is configured to start supplying resin to the cavity first among several valve devices receiving resin from the injection cylinder, the valve device at the next position is temporarily lowered by the resin pressure of the injection cylinder therein. As a result, the gate is locally opened and the gate is fully opened by rising by the resin pressure acting on the cavity side injected by the valve device of the above embodiment. The object of the present invention is to provide a hot runner valve device that has a relatively simple structure and can stably implement sequence control for multi-cavity molds by shielding the gate as the lifting piston descends by the return spring as the resin pressure in the nozzle and the nozzle are balanced.
상기의 목적을 실현하기 위한 본 발명의 제1실시례는, 내부 중심으로 용융수지가 통과하는 수지로 및 이 수지로를 확장하여 확장공간이 연결형성된 바디와, 이 바디의 하부 내측에 구비되어 수지를 공급받아 안내하는 것으로 그 하측으로는 감소된 지름을 가지면서 수지가 토출되는 출구가 마련된 런너부를 구비한 런너실린더로 이루어진 노즐; 상기 런너실린더의 내부에 승강되게 구비되되 그 상부에는 수지의 유입압에 의해 하강력이 작용하도록 하는 압력작용부 및 이 압력작용부의 하측에 연결 구비되되 수지가 통과하는 통로를 형성한 연결부 및 이 연결부의 중심에서 연장되어 상기 런너부상에 배치되면서 선택적으로 게이트를 개폐시키는 것으로 런너부와의 사이에 상승챔버를 형성하여 통로를 경유한 수지압의 작용시 상승력이 작용하도록 유도하는 게이트핀을 구비한 승강피스톤; 상기 확장공간의 상부측에 상단이 걸림되고 하단은 상기 런너실린더의 일측에 형성된 단차턱에 걸림되되 상기 압력작용부의 상단이 접촉되는 것에 의해 승강피스톤의 상승시 하방향으로의 탄성력을 작용하는 복귀스프링;으로 구성된 것을 그 특징으로 한다.The first embodiment of the present invention for realizing the above object is a resin passage through which the molten resin passes to the inner center and a body in which an expansion space is formed by extending the resin passage, and the resin is provided inside the lower part of the body a nozzle composed of a runner cylinder having a runner part provided with an outlet through which resin is discharged while having a reduced diameter at a lower side of the nozzle to receive and guide; A pressure acting part that is provided to be raised and lowered inside the runner cylinder and a lowering force is applied by the inflow pressure of the resin on the upper part, and a connection part and this connection part connected to the lower side of the pressure acting part to form a passage through which the resin passes, and this connection part elevating and lowering having a gate pin extending from the center of piston; The upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw formed on one side of the runner cylinder, and the upper end of the pressure applying part is in contact with a return spring that applies an elastic force in the downward direction when the lifting piston is raised. It is characterized by being composed of ;.
상기의 목적을 실현하기 위한 본 발명의 바람직한 제2실시례는, 내부 중심으로 용융수지가 통과하는 수지로 및 이 수지로를 확장하여 된 확장공간이 연결 형성된 바디와, 이 바디의 하부 내측으로 상단부가 연결 조립되되, 내부 상, 하측에는 각각 지름을 감소하여 형성된 단차턱과 걸림턱이 형성되고, 하부는 수지가 토출되는 출구가 마련된 런너부로 된 런너실린더로 이루어진 노즐; 상기 런너실린더의 내부에 승강 구비되는 것으로 그 상부에는 수지의 유입압에 의해 하강력이 작용하는 압력작용부 및 이 압력작용부의 하측으로 감소된 지름을 가지면서 연장되되 측면으로 수지가 통과하여 배출되도록 토출통로를 형성하고 그 하면은 하강시 걸림턱에 걸림되는 토출부 및 이 토출부의 중심에서 감소된 지름을 가지면서 연장되어 상기 런너부상에 배치되고 그 끝단부가 승강 변위에 의해 게이트를 개폐시키는 것으로 상기 런너부와의 사이에 상승챔버를 형성하는 게이트핀을 구비한 승강피스톤; 상기 확장공간의 상부측에 상단이 걸림되고 하단은 상기 단차턱에 걸림되되 상기 압력작용부의 상단이 접촉되는 것에 의해 승강피스톤의 상승시 하방향으로의 탄성력을 작용하는 복귀스프링;을 포함하여 구성된 것을 그 특징으로 한다.A second preferred embodiment of the present invention for realizing the above object is a body in which a resin passage through which the molten resin passes to the inner center and an expansion space formed by extending the resin passage are connected, and the upper end part inside the lower part of the body is connected and assembled, a nozzle comprising a runner cylinder comprising a runner part provided with an outlet for discharging the resin, the lower part of which is formed by reducing diameters on the upper and lower sides, respectively, and formed with stepped and locking jaws; The runner cylinder is raised and lowered inside the runner cylinder, and the upper part has a pressure-acting part on which a descending force is applied by the inflow pressure of the resin, and the pressure-acting part is extended with a reduced diameter to the lower side so that the resin passes through the side and is discharged. A discharge passage is formed, and the lower surface thereof extends with a reduced diameter from the center of the discharge portion and the discharge portion caught by the locking jaw when descending, is disposed on the runner portion, and the end portion opens and closes the gate by lifting and lowering displacement. an elevating piston having a gate fin forming a rising chamber between the runner and the runner; The upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw, and a return spring that applies an elastic force in the downward direction when the lifting piston is raised by contacting the upper end of the pressure applying part. characterized by it.
본 발명의 바람직한 한 특징으로서, 승강피스톤은 내부에 하향 진행하면서 지름이 감소되는 공간인 하강챔버를 형성하여 수지압력이 작용하도록 유도하는 경사면을 갖는 압력작용부; 상기 압력작용부의 하부에서 감소된 지름으로 연결 되는 관형상의 부재로 동심원을 중심으로 방사상으로 하나 또는 복수의 통로를 형성하여 하강챔버의 수지가 이동될 수 있도록 하는 연결부; 상기 연결부의 하부 중심에서 길게 연장되어 런너부 상에 배치되는 것에 의해 그 주위로 상승챔버가 형성된 것으로 끝단부는 금형모듈의 게이트를 차폐하도록 위치된 상태에서 수지압의 작용시 승강동작에 의해 선택적으로 개방하는 게이트핀;으로 구성된 것에 있다.As a preferred feature of the present invention, the lifting piston has a pressure acting portion having an inclined surface for inducing the resin pressure to act by forming a descending chamber, which is a space in which the diameter decreases while proceeding downward; a tubular member connected with a reduced diameter at the lower portion of the pressure-acting part, and a connection part for forming one or a plurality of passages radially around a concentric circle to allow the resin of the descending chamber to move; An ascending chamber is formed around it by extending long from the lower center of the connection part and being disposed on the runner part, and the end part is positioned to shield the gate of the mold module and selectively opened by the lifting operation when the resin pressure is applied There is a gate fin that is composed of;
본 발명의 다른 특징으로서, 런너실린더는 상기 바디의 하부에 나사체결로 연결되는 것으로 내부 지름은 상기 확장공간에 대응하는 지름을 갖도록 형성되되, 내부 상측에는 복귀스프링의 하단이 걸림되도록 지름을 감소하여 된 단차턱을 형성한 관 형상의 배럴부; 이 배럴부의 하부에 일체로 연장 구비되되 상대적으로 감소된 지름을 갖는 것에 의해 게이트핀과의 사이에 공간인 상승챔버를 형성하고, 금형모듈의 게이트 일측에 하단부가 접속되는 런너부;로 구성되는 것에 있다.As another feature of the present invention, the runner cylinder is connected to the lower part of the body by screwing, and the inner diameter is formed to have a diameter corresponding to the expansion space, and the inner upper side reduces the diameter so that the lower end of the return spring is caught. a tubular barrel part having a stepped step; A runner part extending integrally to the lower part of the barrel and having a relatively reduced diameter to form a rising chamber that is a space between the gate pin and a runner part connected to one side of the gate of the mold module; have.
본 발명의 또 다른 특징으로서, 노즐은 상,하 관통된 관형상의 부재로 상부에는 수지를 공급받아 유동하는 수지로가 형성되고, 이 수지로의 하측으로는 수지로에 대해 지름을 확장하여 된 것으로 복귀스프링이 구비되는 확장공간을 형성한 바디; 이 바디의 외면에 구비되어 수지로내의 수지가 고화되는 것을 방지하는 히터; 이 히터를 외부에 노출되지 않게 수용하는 하우징;으로 구성되는 것에 있다.As another feature of the present invention, the nozzle is a tubular member penetrating up and down, and a resin passage is formed on the upper part to receive resin and flow, and the diameter of the resin furnace is expanded to the lower side of the resin furnace. a body having an extended space provided with a return spring; a heater provided on the outer surface of the body to prevent the resin from solidifying in the resin furnace; A housing for accommodating the heater so as not to be exposed to the outside;
본 발명의 바람직한 또 다른 특징으로서, 상기 게이트핀은 하단부에 상기 게이트를 차폐하는 크기를 갖는 것으로 측면에 수직하는 방향으로 게이트와의 사이에 통기공을 형성한 런너팁으로 구성되는 것에 있다.As another preferred feature of the present invention, the gate fin has a size to shield the gate at the lower end and is composed of a runner tip having a vent hole formed between the gate and the gate in a direction perpendicular to the side.
본 발명은 별도의 구동원 없이도 사출실린더의 수지압과 복귀 스프링만으로 승강피스톤을 승강시켜 게이트에 대한 개폐가 이루어지므로, 구조의 간소화에 따른 경제적인 제조 및 설치와 유지관리의 편의성이 우수한 이점이 있다. 즉, 노즐의 내부에 사출압이 작용하면 승강 피스톤의 상부에 우선적으로 사출압이 작용함으로써 일시 하강하여 게이트를 일시 개방시킴과 동시에 승강피스톤의 하부로 유입된 수지압에 의해 다시 상승 이동하여 게이트에 대한 완전 개방동작을 이루어 금형의 캐비티에 대한 충전이 실시되고, 캐비티에 대한 충전이 완료되면 노즐 내부의 압력평형으로 인해 복귀스프링의 탄성지지력에 의해 승강피스톤을 하강 이동시켜 게이트를 폐쇄시키므로 결과적으로 게이트에 대한 개방동작을 사출압에 연동하여 신속하고 정확하게 이루어질 수 있는 이점이 있다. 특히, 본 발명은 다캐비티 금형에 적용되었을 때 각 캐비티에 배치된 각각의 밸브장치가 수지의 충전이 완료되면 압력평형 작용에 의해 자동으로 게이트를 개폐시키므로, 금형의 보압시간이나 사출타이밍에 대한 정밀한 관리나 기술 또는 장치 등이 없어도 금형 전체의 캐비티에 대한 안정적이고 정확한 수지공급과 차단 그리고 보압을 가능하게 하므로 사출작업의 편의성과 효율성을 대폭 높일 수 있는 유용한 효과가 있다.According to the present invention, the gate is opened and closed by elevating the lifting piston only with the resin pressure and the return spring of the injection cylinder without a separate driving source, so economical manufacturing and installation and maintenance convenience according to the simplification of the structure are excellent. That is, when the injection pressure is applied to the inside of the nozzle, the injection pressure is preferentially applied to the upper part of the lifting piston, which causes the gate to temporarily lower and at the same time to temporarily open the gate. As a result, the gate is closed by moving the lifting piston down by the elastic support force of the return spring due to the pressure balance inside the nozzle when the filling of the cavity is completed. There is an advantage in that the opening operation for the valve can be performed quickly and accurately by interlocking the injection pressure. In particular, when the present invention is applied to a multi-cavity mold, each valve device disposed in each cavity automatically opens and closes the gate by the pressure equalization action when the resin filling is completed, so the precision of the mold holding time or injection timing is It has a useful effect that can greatly increase the convenience and efficiency of injection operation because it enables stable and accurate resin supply, blocking, and holding pressure to the cavity of the entire mold without management, technology, or equipment.
도 1은 종래 기술에 따른 핫런너 밸브장치를 나타낸 단면도,1 is a cross-sectional view showing a hot runner valve device according to the prior art;
도 2는 본 발명의 제1실시례의 내부 구조를 나타낸 절개 사시도,2 is a cutaway perspective view showing the internal structure of the first embodiment of the present invention;
도 3 및 도 4는 제1실시례의 분해 사시도,3 and 4 are exploded perspective views of the first embodiment;
도 5 내지 도 7은 제1실시례에서 동작을 설명하기 위한 단면도,5 to 7 are cross-sectional views for explaining the operation in the first embodiment;
도 8은 제1실시례에 따른 승강피스톤의 발췌 사시도,8 is an excerpted perspective view of the lifting piston according to the first embodiment;
도 9 내지 도 11은 도 5 내지 도 7을 랜더링한 이미지,9 to 11 are images rendered in FIGS. 5 to 7;
도 12는 본 발명의 게이트 개폐 동작을 설명하기 위한 도면,12 is a view for explaining the gate opening and closing operation of the present invention;
도 13은 본 발명의 제2실시례의 내부 구조를 나타낸 절개 사시도,13 is a cutaway perspective view showing the internal structure of a second embodiment of the present invention;
도 14는 제2실시례에 따른 분해 사시도, 14 is an exploded perspective view according to the second embodiment;
도 15 내지 도 17은 제2실시례에의 동작을 설명하기 위한 단면도,15 to 17 are cross-sectional views for explaining the operation of the second embodiment;
도 18 및 도 19는 제 2실시레의 동작을 설명하기 위한 도면.18 and 19 are diagrams for explaining the operation of the second embodiment.
<부호의 설명><Explanation of code>
1 : 핫런너 밸브장치 10 : 노즐 11 : 바디1: hot runner valve device 10: nozzle 11: body
11a : 확장공간 13 : 하우징 15 : 히터11a: expansion space 13: housing 15: heater
20 : 복귀스프링 30 : 런너실린더 31 : 배럴부20: return spring 30: runner cylinder 31: barrel part
31a : 단차턱 33 : 런너부 33a : 걸림턱31a: stepped jaw 33: runner part 33a: locking jaw
50 : 승강피스톤 51 : 압력작용부 51a : 경사면50: lifting piston 51: pressure acting part 51a: inclined surface
53 : 연결부 53h : 통로 54 : 토출부53: connection part 53h: passage 54: discharge part
54h : 토출통로 55 : 게이트핀 a,b : 상,하부공간54h: discharge passage 55: gate pins a, b: upper and lower spaces
이하에서는 첨부한 도면을 참조하면서 본 발명의 실시예에 대한 구성 및 작용을 상세하게 설명하기로 한다. 다만, 본 발명을 특정한 개시형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. 본 출원에서 "포함하다" 또는 "가지다" 등의 용어는 명세서 상에 기재된 특징, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지 하나 또는 그 이상의 다른 특징들이나 단계, 동작, 구성 요소, 부분품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다. 또한, 다르게 정의되지 않는 한 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 것과 동일한 의미를 가지고 있다. 일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련기술의 문맥상 가지는 의미와 일치하는 의미를 가지는 것으로 해석되어야 하며, 본 출원에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다. 여기서, 반복되는 설명, 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능, 및 구성에 대한 구체적인 설명은 본 발명의 요지를 모호하지 않게 하기 위하여 생략하며, 본 발명의 실시형태는 보다 완전하게 설명하기 위해서 제공되는 것이어서 도면에서의 요소들의 형상 및 크기 등은 보다 명확한 설명을 위해 과장될 수 있다.Hereinafter, the configuration and operation of the embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, it is to be understood that the present invention is not intended to be limited to the specific disclosed form, and includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features, steps, or operations , it should be understood that it does not preclude the possibility of the existence or addition of components, parts, or combinations thereof. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not Here, repeated descriptions, well-known functions that may unnecessarily obscure the subject matter of the present invention, and detailed descriptions of configurations are omitted so as not to obscure the subject matter of the present invention, and embodiments of the present invention will be described more completely. Since it is provided for this purpose, the shapes and sizes of elements in the drawings may be exaggerated for clearer description.
이하 본 발명의 제1실시례 따른 사출압 개폐 제어형 핫런너 밸브장치을 도 1 내지 도 12를 참조하여 설명하기로 한다.Hereinafter, an injection pressure opening/closing control type hot runner valve device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 12 .
먼저, 본 발명은 사출을 시작하여 금형에 사출압이 작용하여 충전이 완료되면 압력평형이 발생하게 되는데, 이러한 압력평형의 발생시 탄성체의 탄성복원력에 의해 압력차 피스톤이 하강하여 금형의 게이트를 막도록 하는 것을 주요한 기술적 특징으로 한다. 이러한 구성의 본 발명은 금형의 보압타임을 정밀하게 관리하지 않아도 압력평형에 의해 자동으로 게이트가 닫히므로 결과적으로 보압타임을 조절하는데 있어 자유도가 높아짐에 따라 편의성을 높일 수 있을 뿐만 아니라 보압타임의 잘못된 설정으로 성형품의 불량 발생을 방지할 수 있다.First, according to the present invention, when injection is started and injection pressure is applied to the mold and filling is completed, pressure equilibrium occurs. It is a major technical feature. In the present invention of this configuration, the gate is automatically closed by pressure equalization even without precisely managing the holding pressure time of the mold. The setting can prevent the occurrence of defects in the molded product.
도 2는 본 발명의 내부 구조를 나타낸 사시도이다. 도면에는 내부 중심으로 용융 상태의 수지가 통과하는 수지로(11b)를 형성한 것으로 이 수지로(11b)의 하측으로는 지름을 확장하여 된 확장공간(11a)이 형성되고 그 하단부는 게이트(g)를 형성한 금형모듈(m)의 일측에 접속되는 바디(11)를 구비한 노즐(10)과, 상기 노즐(10)의 내부에 나사체결로 조립되어 일체로 연결되는 것으로 그 내부는 상기 확장공간(11a)에 대응하는 지름의 유로(미부호)를 형성하여 된 것으로 상기 게이트(g)를 형성한 금형모듈(m)의 일측에 접속되는 런너실린더(30)와, 상기 런너실린더(30)의 내부에 구비되어 수지의 작용압에 의해 승강 연동되는 것으로 금형모듈(m)의 게이트(g)를 차폐한 상태에서 수지압의 공급에 의해 일시 하강하여 게이트(g)를 개방하여 내부 압력평형 상태를 해제함과 동시에 바로 상승하여 게이트(g)를 완전 개방하는 게이트핀(55)을 구비한 승강피스톤(50)과, 상기 노즐(10)의 확장공간(11a)에 구비되어 그 상단은 확장공간(11a)의 상부에 걸림되어 지지되고 그 하단은 상기 런너실린더(30)의 내부 상측에 제공된 단차턱(31a)에 걸림되는 것으로 상기 승강피스톤(50)의 상승 이동시 금형모듈(m)의 캐비티(c)에 대한 수지주입이 완료되어 압력평형이 발생하면 승강피스톤(50)을 가압하여 게이트(g)를 차폐하도록 탄성지지력을 작용하는 복귀스프링(20)으로 이루어진 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.2 is a perspective view showing the internal structure of the present invention. In the figure, a resin passage 11b through which the molten resin passes is formed in the center of the drawing, and an expansion space 11a is formed by expanding the diameter below the resin furnace 11b, and the lower end thereof is a gate (g). ) formed by a nozzle 10 having a body 11 connected to one side of the mold module m, and the nozzle 10 is assembled and integrally connected by screwing inside the nozzle 10, the inside of which is the expansion A runner cylinder 30 connected to one side of the mold module m on which the gate g is formed by forming a flow path (unsigned) with a diameter corresponding to the space 11a, and the runner cylinder 30 It is provided in the inside of the and linked up and down by the action pressure of the resin. In the state where the gate (g) of the mold module (m) is shielded, the gate (g) is temporarily lowered by the supply of the resin pressure, and the gate (g) is opened to equalize the internal pressure. A lifting piston 50 having a gate pin 55 that rises immediately and completely opens the gate g at the same time as releasing (11a) is caught on the upper part and supported, and the lower end thereof is caught on the stepped jaw 31a provided on the inner upper side of the runner cylinder 30. When the lifting piston 50 moves upward, the cavity of the mold module (m) ( When the resin injection for c) is completed and pressure equilibrium occurs, the injection pressure opening/closing control type hot runner valve device ( 1) is shown.
도 3은 본 발명의 사출압 개폐 제어형 핫런너 밸브장치를 상측에서 바라본 분해 사시도이고, 도 4는 하측에서 바라본 분해사시도이다. 도면에는 외체를 형성하는 것으로 내부에 수지로(11b)와 확장공간(11a)을 형성한 관 형상의 바디(11) 및 이 바디(11)의 외면을 감싸도록 구비되어 수지가 고화되는 것을 방지하는 히터(15) 및 이 히터(15)의 외면을 감싸는 커버요소인 하우징(13)으로 이루어지 노즐(10)과, 상기 노즐(10)의 하측에 나사체결로 조립되는 것으로 수지를 공급받아 하측으로 안내하도록 내부가 비어 있는 관형상의 런너실린더(30)와, 상기 런너실린더의 내부에 슬라이드 접촉되어 승강되는 것으로 수지의 공급시 상부공간과 하부공간에서 각각 하강력과 상승력을 작용받아 하부에 구비된 게이트핀(55)이 금형모듈(m)의 게이트(g)를 개폐하도록 승강 동작을 수행하는 승강피스톤(50)과, 상기 노즐의 내부에 설치되어 상기 상승 이동된 승강피스톤에 대해 하강 탄성 지지력을 작용하는 복귀스프링(20)으로 구성된 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.3 is an exploded perspective view of the injection pressure opening/closing control type hot runner valve device of the present invention viewed from the upper side, and FIG. 4 is an exploded perspective view viewed from the lower side. In the drawings, a tubular body 11 having a resin furnace 11b and an expansion space 11a formed therein as an outer body is provided to surround the outer surface of the body 11 to prevent the resin from solidifying A nozzle 10 comprising a heater 15 and a housing 13 which is a cover element surrounding the outer surface of the heater 15, and the nozzle 10 is assembled by screwing on the lower side of the nozzle 10, and the resin is supplied to the lower side. A tubular runner cylinder 30 with an empty interior to guide, and a slide contact with the inside of the runner cylinder to ascend and descend. The elevating piston 50 which performs a lifting operation so that the gate pin 55 opens and closes the gate g of the mold module m, and the lowering elastic support force for the lifting piston installed inside the nozzle and moved upward An injection pressure opening/closing control type hot runner valve device 1 composed of an acting return spring 20 is shown.
도 5는 본 발명의 내부 구조를 나타낸 종단면도이다. 도면에는 상,하 관통되고 내부는 비어 있는 관형상을 갖는 것으로 내부 상측에 수지로(11b)가 형성되고, 그 하측으로는 상대적으로 지름을 확장하여 된 확장공간(11a)이 형성된 바디(11) 및 이 바디(11)의 외면을 감싸도록 구비되어 수지가 고화되는 것을 방지하도록 가열을 하는 히터(15) 및 이 히터(15)가 외부에 노출되지 않도록 감싸는 커버요소인 하우징(13)으로 이루어진 노즐(10)과, 상기 노즐(10)의 확장공간(11a)에 설치되어 하방향으로 탄성지지력을 작용하는 복귀스프링(20)과, 상기 바디(11)의 하부측에 연결 조립되는 것으로 내부 상측에 복귀스프링(20)의 하단부가 걸림되는 단차턱(31a)이 형성된 배럴부(31) 및 이 배럴부(31)의 하부에서 감소된 지름을 갖도록 연장되는 런너부(33)로 이루어진 런너실린더(30)와, 상기 런너실린더(30)의 내부에 슬라이드 접촉되면서 승강 가능하게 구비되는 것으로 상부에는 수지압에 의해 하강력을 발생시키기 위한 하강챔버(a)가 구비되고, 하부에는 수지압에 의해 상승력을 발생시키기 위한 상승챔버(b)가 마련된 것으로 상승챔버(b)가 형성된 압력작용부(51) 및 이 압력작용부(51)의 하측에 연결 구비되는 것으로 수지가 이동되는 통로(53h)를 형성한 연결부(53) 및 이 연결부(53)의 하부 중심에서 연장 구비되는 것으로 상기 런너부(33)와의 사이에 상승챔버(b)를 형성하는 것으로 그 끝단이 금형모듈(m)의 게이트(g)를 개폐하는 게이트핀(55)으로 이루어진 승강피스톤(50)으로 구성되는 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.5 is a longitudinal cross-sectional view showing the internal structure of the present invention. In the drawing, a body 11 having a tubular shape that is penetrated up and down and has a hollow inside, and a resin furnace 11b is formed on the upper side of the inside, and an expansion space 11a that is relatively enlarged in diameter is formed on the lower side of the body 11 and a heater 15 provided to surround the outer surface of the body 11 and heating to prevent the resin from solidifying, and a housing 13 that is a cover element that surrounds the heater 15 so that the heater 15 is not exposed to the outside. (10), and a return spring (20) installed in the expansion space (11a) of the nozzle (10) to apply an elastic supporting force in the downward direction, and the body (11) connected to the lower side of the body (11) and assembled on the upper side of the inner side A runner cylinder 30 comprising a barrel part 31 having a stepped step 31a on which the lower end of the return spring 20 is caught, and a runner part 33 extending from the lower part of the barrel part 31 to have a reduced diameter. ) and the runner cylinder 30, which is provided so as to be able to ascend and descend while in sliding contact with the interior of the runner cylinder 30, and is provided with a descending chamber (a) for generating descending force by resin pressure in the upper part, and the ascending force by the resin pressure in the lower part. It is provided with a rising chamber (b) for generating a rising chamber (b) and is connected to the lower side of the pressure acting portion 51 and the pressure acting portion 51 to form a passage 53h through which the resin is moved. The connection part 53 and the connection part 53 are extended from the center of the lower part to form a rising chamber (b) between the runner part 33 and the end of the mold module (m) gate (g). An injection pressure opening/closing control type hot runner valve device 1 composed of a lifting piston 50 made of a gate pin 55 to open and close is shown.
도 6은 본 발명의 1차 게이트 오픈 상태를 설명하기 위한 종단면도이다. 도면에는, 사출실린더로부터 수지가 공급되는 경우 노즐(10)의 내부에 설치된 승강피스톤(50)의 압력작용부(51)에 수지압이 작용함에 따라 상기 승강피스톤(50)은 하방향으로 변위되고, 도면에서 보는 바와 같이 금형모듈(m)의 게이트(g)를 기준으로 하방향으로 돌출되는 것에 의해 게이트(g)를 일시 개방하게 된다. 즉, 사출실린더의 사출압이 작용하는 시작점에서는 상기 하강챔버(a)에 작용하는 수지압이 크기 때문에 승강피스톤(50)을 하강 이동시키는 구성이 도시되어 있다.6 is a longitudinal cross-sectional view for explaining the primary gate open state of the present invention. In the drawing, when the resin is supplied from the injection cylinder, the lifting piston 50 is displaced in the downward direction as the resin pressure acts on the pressure acting part 51 of the lifting piston 50 installed inside the nozzle 10, and , as shown in the drawing, the gate g is temporarily opened by protruding downward based on the gate g of the mold module m. That is, since the resin pressure acting on the lowering chamber (a) is large at the starting point at which the injection pressure of the injection cylinder acts, the configuration for moving the lifting piston 50 down is shown.
도 7은 2차 게이트 오픈 상태를 설명하기 위한 종단면도이다. 도면에는, 도 6에 이어서 하강챔버(a)에 작용하는 수지압은 승강피스톤(50)의 런너실린더(30)에 형성된 통로(53h)를 통해 상승챔버(b)에 작용하게 되는데, 이때 상기 게이트(g)가 일시 개방된 것에 의해 상승챔버(b)에 작용하는 수지압의 크기가 하강챔버(a)에 작용하는 수지압에 비해 상대적으로 커지기 때문에 상기 승강피스톤(50)은 상승 이동을 하여 게이트(g)를 완전 개방 상태를 이루게 되는 구성이 도시되어 있다.7 is a longitudinal cross-sectional view for explaining the secondary gate open state. In the drawing, the resin pressure acting on the descending chamber (a) following FIG. 6 is applied to the ascending chamber (b) through the passage (53h) formed in the runner cylinder (30) of the lifting piston (50). At this time, the gate When (g) is temporarily opened, the amount of the resin pressure acting on the ascending chamber (b) is relatively large compared to the resin pressure acting on the descending chamber (a), so the lifting piston 50 moves upward to the gate. (g) is shown the configuration to achieve a fully open state.
도 8은 본 발명의 승강피스톤을 발췌하여 나타낸 사시도이다. 도면에는, 상부에 관형상으로 제공되는 압력작용부(51)와, 이 압력작용부(51)의 하측으로 감소된 지름을 갖는 것으로 하부에 동심원 중심으로 방사상으로 복수의 통로(53h)가 관통된 연결부(53)와, 상기 연결부(53)의 하부 중심에서 하측방향으로 길게 연장되는 것으로 그 끝단부에 마련된 런너팁(55a)이 게이트(g)를 개폐시키는 게이트핀(55)으로 이루어진 승강피스톤(50)이 도시되어 있다.8 is a perspective view showing an excerpt of the lifting piston of the present invention. In the drawing, a plurality of passages (53h) radially centered on a concentric circle at the lower portion having a pressure acting portion 51 provided in a tubular shape on the upper portion and a diameter reduced to the lower side of the pressure applying portion 51 are penetrated. A connecting portion 53 and a elevating piston ( 50) is shown.
도 9 내지 도 11은 도 5 내지 도 7을 랜더링한 이미지이고, 도 12는 본 발명의 게이트 개폐 동작을 설명하기 위한 도면이다. 9 to 11 are rendered images of FIGS. 5 to 7 , and FIG. 12 is a view for explaining a gate opening/closing operation of the present invention.
한편, 본 발명에 따른 사출압 개폐 제어형 핫런너 밸브장치는 다캐비티 금형에 사용할 수 있도록 매니폴드에 연결 사용되는 멀티 타입의 밸브장치에 사용되거나 또는 단일의 캐비티에 사용되는 싱글 타입으로 사용될 수 있으며, 이는 공지의 기술에 의해 실시되어도 무방하므로 상세한 설명은 생략한다.On the other hand, the injection pressure opening/closing control type hot runner valve device according to the present invention may be used in a multi-type valve device connected to a manifold so that it can be used in a multi-cavity mold, or it may be used as a single type used in a single cavity, Since this may be performed by a known technique, a detailed description thereof will be omitted.
이하, 도면을 참조하여 본 발명에 따른 사출압 개폐 제어형 핫런너 밸브장치의 구성을 살펴보면, 크게 노즐(10)과, 런너실린더(30)와, 승강피스톤(50) 그리고 복귀스프링(20)으로 구성된다.Hereinafter, looking at the configuration of the injection pressure opening/closing control type hot runner valve device according to the present invention with reference to the drawings, it is largely composed of a nozzle 10, a runner cylinder 30, a lifting piston 50, and a return spring 20. do.
노즐(10)은 사출실린더로부터 수지를 공급받아 금형의 캐비티측으로 안내하기 위한 요소로, 크게 외체를 형성하는 바디(11)와, 이 바디(11)의 외면에 감겨져 발열작용을 하는 히터(15) 그리고 이 히터(15)를 감싸도록 구성되는 하우징(13)으로 구성된다.The nozzle 10 is an element for receiving resin from the injection cylinder and guiding it to the cavity side of the mold. And it is composed of a housing 13 configured to surround the heater (15).
상기 바디(11)는 상,하 관통된 관형상의 부재로 제공되며, 상부는 개방되어 사출실린더로부터 용융 상태의 수지를 공급받도록 구성되고, 내부 중심은 수지로(11b)를 형성하여 공급받은 수지가 이동되는 통로를 제공하며, 이 수지로(11b)의 하측으로는 상기 수지로(11b)에 대해 지름을 확장하여 된 것으로 복귀스프링(20)과 런너실린더(30)가 설치되는 공간인 확장공간(11a)이 형성되는 구성이다.The body 11 is provided as a tubular member penetrating up and down, the upper part is opened to receive the resin in the molten state from the injection cylinder, and the inner center is the resin supplied by forming the resin furnace 11b. It provides a passage through which the resin furnace 11b moves, and the lower side of the resin furnace 11b is formed by extending the diameter with respect to the resin furnace 11b, and is an extended space that is a space in which the return spring 20 and the runner cylinder 30 are installed. (11a) is formed.
상기 히터(15)는 상기 바디(11)의 외면을 감싸도록 구비되어 외부로부터 전원을 공급받아 발열을 하는 요소로서, 상기 바디(11)의 내부를 유동하는 수지가 용융상태를 유지하도록 가열시킴으로써 수지의 고화를 방지하는 역할을 한다.The heater 15 is provided to surround the outer surface of the body 11 and is an element that generates heat by receiving power from the outside, and by heating the resin flowing inside the body 11 to maintain a molten state, the resin It serves to prevent the solidification of
상기 하우징(13)은 상기 히터(15)를 외부에 노출되지 않도록 감싸는 금속 관형상의 수용부재이다. 이러한 구성의 노즐(10)은 공지의 기술에 의해 실시되어도 무방하며, 그 소재나 형태는 적절하게 변형되어 실시될 수 있을 것이다.The housing 13 is a metal tube-shaped accommodation member that surrounds the heater 15 so as not to be exposed to the outside. The nozzle 10 of this configuration may be implemented by a known technique, and its material or shape may be appropriately modified and implemented.
런너실린더(30)는 상기 바디(11)의 하부에 일체로 연결 구비되어 수지로(11b)를 통과한 수지를 공급받기 위한 연결관로요소로, 상기 바디(11)의 확장공간(11a)에 대응되는 내부 지름을 가지면서 상기 바디(11)에 나사체결로 조립 연결되는 밸럴부(31)와, 이 밸럴부(31)의 하부를 형성하는 것으로 금형모듈(m)의 게이트(g)로 수지를 토출하도록 상기 금형모듈(m)에 접속하는 런너부(33)로 구성된다.The runner cylinder 30 is integrally connected to the lower part of the body 11 and is a connecting pipe element for receiving the resin passing through the resin furnace 11b, and corresponds to the expansion space 11a of the body 11. By forming the ball part 31 that is assembled and connected to the body 11 by screwing and the lower part of the ball part 31 while having an inner diameter that becomes It is composed of a runner part 33 connected to the mold module (m) to discharge.
상기 밸럴부(31)는 상기 노즐(10)을 구성하는 바디(11)의 하부에 그 상부 외면이 나사체결로 연결 구비되며, 내부에는 상기 바디(11)의 확장공간(11a)에 대응하는 공간을 형성하되 내부 상측에는 상기 복귀스프링(20)의 하단이 걸림되도록 지름을 감소하여된 단차턱(31a)을 형성한 관 형상의 부재이다.The ball part 31 is provided with an upper outer surface connected to the lower part of the body 11 constituting the nozzle 10 by screwing, and a space corresponding to the expansion space 11a of the body 11 inside. It is a tubular member in which a stepped jaw 31a is formed by reducing the diameter so that the lower end of the return spring 20 is caught on the inner upper side.
상기 런너부(33)는 상기 배럴부(31)의 하부에 일체로 구비되는 것으로 상대적으로 감소된 지름을 갖는 것에 의해 상기 게이트핀(55)과의 사이의 공간에 상승챔버(b)를 형성하고, 상기 금형모듈(m)의 게이트(g) 일측에 하단부가 접속되는 부재이다. 이러한 런너부(33)는 상기 밸럴부(31)에서 지름을 감소시킨 부분에 걸림턱(미부호)을 형성하며, 이 걸림턱은 후술할 승강피스톤(50)이 더 이상 하강하지 않도록 이동을 제한하는 역할을 수행한다.The runner part 33 is integrally provided under the barrel part 31 and has a relatively reduced diameter to form a rising chamber b in the space between the runner part and the gate fin 55, , a member whose lower end is connected to one side of the gate g of the mold module m. The runner part 33 forms a locking jaw (unsigned) at the reduced diameter portion of the ball part 31, which restricts movement so that the lifting piston 50, which will be described later, does not descend any further. perform the role
승강피스톤(50)은 런너실린더(30)의 내부에 승강 가능하게 구비되는 것에 의해 금형모듈(m)의 게이트(g)를 선택적으로 차폐하는 요소로서, 이러한 승강피스톤(50)은 크게 압력작용부(51)와, 연결부(53) 그리고 게이트핀(55)으로 구성된다.The elevating piston 50 is an element that selectively shields the gate g of the mold module m by being elevatingly provided inside the runner cylinder 30, and this elevating piston 50 is largely a pressure acting part. 51 , a connection part 53 , and a gate pin 55 .
상기 압력작용부(51)는 상부에 수지로(11b)를 경유하여 공급되는 수지의 유입압에 의해 하강력이 작용하도록 하측으로 진행하면서 점차 지름이 감소되는 형상의 경사면(51a)을 형성한다. 부연 설명을 하면, 상기 압력작용부(51)는 내부에 수지가 유동되도록 속이 빈 관형상으로 제공되되, 도면을 기준으로 내부 상측에서 하향 진행하면서 지름이 감소되는 공간인 하강챔버(a)를 형성하도록 경사면(51a)을 형성하며, 상기 수지로(11b)에서 공급되는 용융수지는 상기 압력작용부(51)의 하강챔버(a) 구간에서 급격하게 유동이 저하됨에 따라 하강력을 작용하게 된다.The pressure acting part 51 forms an inclined surface 51a having a shape in which the diameter is gradually reduced while proceeding downward so that a descending force is applied by the inflow pressure of the resin supplied via the resin furnace 11b to the upper part. To elaborate, the pressure acting part 51 is provided in a hollow tubular shape so that the resin flows therein, and a descending chamber (a) is formed, which is a space in which the diameter is reduced while proceeding downward from the upper side of the inside based on the drawing. The inclined surface 51a is formed to do this, and the molten resin supplied from the resin furnace 11b acts as a descending force as the flow is rapidly reduced in the descending chamber (a) section of the pressure acting part 51 .
상기 연결부(53)는 상기 압력작용부(51)의 하측에 도면을 기준으로 하향 연장되되 하방향으로 수지가 통과하도록 수직하게 관통된 통로(53h)를 형성하는 구성이다. 부연 설명을 하면, 이러한 연결부(53)는 상기 압력작용부(51)의 하부에서 감소된 지름으로 연결되는 관 형상의 부재로, 수직하는 방향으로 동심원을 중심으로 하면서 방사상으로 하나 또는 복수의 통로(53h)를 관통 형성한 구성이며, 이 통로(53h)를 통해 상기 하강챔버(a)에 작용하는 수지가 이동하게 된다.The connection part 53 is configured to form a passage 53h extending downwardly based on the drawing on the lower side of the pressure acting part 51 and penetrating vertically so that the resin passes in the downward direction. To elaborate, this connection part 53 is a tubular member that is connected with a reduced diameter at the lower part of the pressure acting part 51, and one or a plurality of passages ( 53h), the resin acting on the lowering chamber (a) moves through this passage (53h).
상기 게이트핀(55)은 상기 연결부(53)의 중심에서 연장되어 상기 런너부(33)상에 배치되어 승강동작에 의해 그 하단부가 선택적으로 상기 금형모듈(m)의 게이트(g)를 개폐시키는 것으로, 상기 런너부(33)와의 사이에 공간인 상승챔버(b)를 형성하는 구성이다. 이 상승챔버(b)에 수지압에 작용하게 되면 상승력이 발생함에 따라 상기 승강피스톤(50)이 상승 이동을 하게 된다. 부연설명을 하면, 본 발명에서의 게이트핀(55)은 상기 연결부(53)의 하부 중심에서 길게 연장되어 상기 런너부(33)의 중심에 배치되는 것에 의해 그 주위로 수지가 채워지는 공간인 상승챔버(b)가 형성되며, 그 끝단부는 금형모듈(m)의 게이트를 차폐하도록 위치된 상태에서 수지압의 작용시 승강동작에 의해 선택적으로 게이트(g)를 개폐시키는 작용을 한다. 한편, 상기 게이트핀(55)은 하단부에 상기 금형모듈(m)의 게이트(g)를 차폐하는 크기를 갖는 것으로 측면에 수직하는 방향으로 게이트(g)와의 사이에 슬릿 형태로 가공된 통기공(55s)을 형성하는 구성이다. 이때의 상기 통기공(55s)은 사출실린더로부터 공급되는 수지의 압력에 의해 승강피스톤(50)이 용이하게 하강 동작을 수행하여야 하지만, 상기 게이트핀(55)과 게이트(g) 주변의 수지가 고화되어 있는 경우 승강 변위가 곤란하므로 상기 상승챔버(b) 내의 수지가 흘러내리지 않을 정도의 틈인 통기공(55s)을 형성하여 최초 수지압의 작용시 이 부분이 쉽게 터질 수 있도록 하는 역할을 수행한다. The gate pin 55 extends from the center of the connection part 53 and is disposed on the runner part 33, and the lower end thereof selectively opens and closes the gate g of the mold module m by a lifting operation. As such, it is configured to form an ascending chamber (b) that is a space between the runner part (33) and the runner part (33). When the lifting chamber (b) acts on the resin pressure, the lifting force is generated and the lifting piston 50 moves upward. To elaborate, the gate fin 55 in the present invention extends long from the lower center of the connection part 53 and is disposed in the center of the runner part 33, which is a space filled with resin around it. A chamber (b) is formed, and an end portion thereof is positioned to shield the gate of the mold module (m) and selectively opens and closes the gate (g) by a lifting operation when the resin pressure is applied. On the other hand, the gate pin 55 has a size to shield the gate g of the mold module m at the lower end, and has a ventilation hole processed in the form of a slit between the gate g and the gate g in the direction perpendicular to the side. 55s). At this time, in the ventilation hole 55s, the lifting piston 50 should easily perform a lowering operation by the pressure of the resin supplied from the injection cylinder, but the resin around the gate pin 55 and the gate g is solidified. In this case, it is difficult to lift and displace, so it forms a vent hole (55s) that is a gap to the extent that the resin in the ascending chamber (b) does not flow down, so that this part can easily burst when the initial resin pressure is applied.
복귀스프링(20)은 상기 노즐(10)의 확장공간(11a) 상부에 상단이 걸림되고 하단은 상기 런너실린더(30)의 내부 일측에 형성된 단차턱(31a)에 걸림되는 구성이며, 상기 압력작용부(51)의 상단이 접촉되는 것에 의해 승강피스톤(50)의 상승시 하방향으로의 탄성력을 작용하는 역할을 한다. 즉, 복귀스프링(20)은 상기 승강피스톤(50)에 사출압이 작용하지 않을 때에는 상기 단차턱(31a)에 걸림됨과 아울러 상기 승강피스톤(50)이 상승 이동하지 않도록 탄성지지력을 작용하며, 상기 승강피스톤(50)의 압력작용부(51)에 사출실린더로부터의 수지압이 작용하면 단차턱(31a)에 걸림 상태를 유지한다. 이어서 상기 승강피스톤(50)의 연결부(53)를 통해 그 하측의 공간인 상승챔버(b)에 수지압이 작용하면 승강피스톤(50)은 상기 복귀스프링(20)의 탄성지지력을 극복하고 상승 이동하여 게이트(g)에 대한 완전 개방 상태를 유지하게 된다. 이후 금형모듈(m)의 게이트(g)를 통해 캐비티에 공급된 수지와 노즐 내부의 수지가 압력 평형을 이루게 되면 상기 승강피스톤(50)의 상승 이동에 의해 수축 상태의 복귀스프링(20)이 탄성복원력에 의해 상기 승강피스톤(50)을 하강 이동시켜 게이트(g)를 차폐한 위치로 복귀시킨다.The return spring 20 has an upper end hooked on the upper part of the expansion space 11a of the nozzle 10 and a lower end hooked with a stepped jaw 31a formed on one side of the inner side of the runner cylinder 30, and the pressure action When the lifting piston 50 is raised by the upper end of the part 51 in contact, it serves to apply an elastic force in the downward direction. That is, when no injection pressure is applied to the lifting piston 50, the return spring 20 is caught on the stepped jaw 31a and acts as an elastic support force so that the lifting piston 50 does not move upward. When the resin pressure from the injection cylinder acts on the pressure acting portion 51 of the lifting piston 50, the state is maintained in the state of being caught by the stepped jaw 31a. Then, when the resin pressure is applied to the lifting chamber b, which is the space below the connecting portion 53 of the lifting piston 50, the lifting piston 50 overcomes the elastic support force of the return spring 20 and moves upward. Thus, the fully open state for the gate (g) is maintained. After that, when the resin supplied to the cavity through the gate g of the mold module m and the resin inside the nozzle achieve pressure equilibrium, the return spring 20 in the contracted state by the upward movement of the lifting piston 50 is elastic. The lifting piston 50 is moved down by the restoring force to return the gate g to the shielded position.
상기와 같이 구성되는 본 발명의 제1 실시례에 따른 사출압 개폐 제어형 핫런너 밸브장치의 동작을 설명하기로 한다.An operation of the injection pressure opening/closing control type hot runner valve device according to the first embodiment of the present invention configured as described above will be described.
노즐(10)은 도 5에 나타내 보인 바와 같이 사출 대기 상태에서는 승강피스톤(50)의 게이트핀(55)이 금형모듈(m)의 게이트(g)를 차폐한 상태를 이룬다. 이러한 상태에서 상기 노즐(10)을 구성하는 바디(11)의 수지로(11b)로 사출실린더로부터 용융 상태의 수지가 공급되어지면, 상기 수지는 수지로(11b)를 통해 확장공간(11a)으로 유입된다. 이렇게 확장공간(11a)측으로 유입된 수지는 런너부(33)의 내부에 승강 가능하게 구비된 승강피스톤(50)의 압력작용부(51)로 유동되면서 하강 압력을 작용하게 되고, 이에 승강피스톤(50)은 도 6에 나타내 보인 바와 같이 일시 하강하여 게이트(g)의 일부를 개방한 상태를 이룬다. As shown in FIG. 5 , the nozzle 10 forms a state in which the gate pin 55 of the lifting piston 50 shields the gate g of the mold module m in the injection standby state. In this state, when the molten resin is supplied from the injection cylinder to the resin furnace 11b of the body 11 constituting the nozzle 10, the resin enters the expansion space 11a through the resin furnace 11b. is brought in The resin introduced into the expansion space 11a in this way flows into the pressure acting part 51 of the lifting piston 50 provided to be able to ascend and descend inside the runner part 33 and acts a descending pressure, thereby applying a descending pressure. 50) temporarily descends as shown in FIG. 6 to form a state in which a part of the gate g is opened.
이어서, 상기 압력작용부(51)에 작용하는 수지가 통로(53h)를 통해 상승챔버(b)에 작용하면, 상기 승강피스톤(50)은 상승압력에 의해 상승 변위를 하게 되어 결과적으로 도 7과 같이 상승 이동되어 게이트(g)에 대한 완전 개방을 이루게 된다. 즉, 상기 승강피스톤(50)이 게이트(g)를 완전 개방한 상승 위치에서는 압력작용부(51)에 작용하는 하강압력보다 상승챔버(b)에 착용하는 상승압력이 더욱 크며, 이때의 상승압력은 복귀스프링(20)의 탄성 지지력을 극복할 정도의 크기를 갖는다.Then, when the resin acting on the pressure acting part 51 acts on the rising chamber b through the passage 53h, the lifting piston 50 is displaced upward by the rising pressure. As a result, as shown in FIG. It moves upward together to achieve complete opening of the gate (g). That is, in the rising position where the lifting piston 50 completely opens the gate g, the upward pressure worn on the ascending chamber b is greater than the downward pressure acting on the pressure acting part 51, and the upward pressure at this time. has a size sufficient to overcome the elastic support force of the return spring 20 .
끝으로, 금형의 캐비티(c)에 대한 수지의 충전이 완료되면 상기 승강피스톤(50)의 상부와 하부 공간에서 압력평형이 발생함에 따라 상기 승강피스톤(50)은 복귀스프링(20)의 탄성 복귀력에 의해 하강하여 도 5와 같이 게이트(g)를 차폐한 상태로 돌아가게 된다.Finally, when the filling of the resin into the cavity (c) of the mold is completed, as pressure equilibrium occurs in the upper and lower spaces of the lifting piston (50), the lifting piston (50) elastically returns the return spring (20) It descends by the force and returns to the state in which the gate (g) is shielded as shown in FIG. 5 .
이하 본 발명의 제2실시례 따른 사출압 개폐 제어형 핫런너 밸브장치을 도 13 내지 도 17를 참조하여 설명하기로 하되, 본 실시례에 따른 사출압 개폐 제어형 핫런너 밸브장치은 앞서 설명한 일 실시례와 동일한 작용을 수행하는 구성요소에 대해서는 동일한 부호를 부여하였고, 각 구성에 대한 중복설명은 생략하거나 간략하게 설명하기로 한다. Hereinafter, an injection pressure opening/closing control type hot runner valve device according to a second embodiment of the present invention will be described with reference to FIGS. 13 to 17, but the injection pressure opening/closing control type hot runner valve device according to this embodiment is the same as the one described above. The same reference numerals are assigned to the components performing the operation, and the redundant description of each component will be omitted or briefly described.
도 13은 본 발명의 제2실시례의 내부 구조를 나타낸 절개 사시도이다. 도면에는 속이 빈 관 형상으로 내부 중심의 상부에는 용융 상태의 수지가 통과하는 수지로(11b)가 형성되고, 이 수지로(11b)의 하측으로는 지름을 확장하여 된 확장공간(11a)이 형성된 바디(11) 및 이 바디(11)의 개방된 하부에 조립연결되는 것으로 상기 확장공간(11a)에 대응하는 관로를 제공하는 것으로 금형모듈(m)의 게이트(g)에 접속하는 런너실린더(30)로 이루어진 노즐(10)과, 상기 런너실린더(30)의 내부에 구비되어 사출실린더로부터 작용하는 수지의 작용압에 의해 상,하부측에서 작용하는 수지압력에 의해 승강 연동되는 승강피스톤(50)과, 상기 바디(11)의 확장공간(11a)에 구비되어 그 상단은 확장공간(11a)의 상부에 걸림되어 지지되고 그 하단은 상기 런너실린더(30)의 내부 상측에 제공된 단차턱(31a)에 걸림되는 것으로 상기 승강피스톤(50)의 상승 이동시 금형모듈(m)의 캐비티(c)에 대한 수지 충전이 완료되어 압력평형이 발생하면 승강피스톤(50)을 가압하여 게이트(g)를 차폐하도록 탄성지지력을 작용하는 복귀스프링(20)으로 이루어진 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.13 is a cut-away perspective view showing the internal structure of the second embodiment of the present invention. In the drawing, a hollow tubular shape, a resin passage 11b through which the molten resin passes is formed in the upper part of the inner center, and an expanded space 11a formed by expanding the diameter is formed on the lower side of the resin passage 11b. The body 11 and the runner cylinder 30 connected to the gate g of the mold module m by providing a conduit corresponding to the expansion space 11a as assembled and connected to the open lower part of the body 11 ), and a lifting piston (50) that is provided inside the runner cylinder (30) and is elevating and interlocking by the resin pressure acting on the upper and lower sides by the action pressure of the resin acting from the injection cylinder (50) And, it is provided in the extension space (11a) of the body (11), the upper end of which is supported by being caught on the upper part of the extension space (11a), and the lower end of the stepped jaw (31a) provided on the inner upper side of the runner cylinder (30) When the resin filling of the cavity (c) of the mold module (m) is completed and pressure equilibrium occurs when the lifting piston (50) is moved upward by being caught in the lifting piston (50), press the lifting piston (50) to shield the gate (g) The injection pressure opening/closing control type hot runner valve device 1 made of a return spring 20 acting as an elastic support force is shown.
도 14는 본 발명을 상측에서 바라본 분해 사시도이다. 도면에는 외체를 형성하는 것으로 내부에 수지로(11b)와 확장공간(11a)을 형성한 관 형상의 바디(11) 및 이 바디(11)의 외면을 감싸도록 구비되어 수지가 고화되는 것을 방지하는 히터(15) 및 이 히터(15)의 외면을 감싸는 커버요소인 하우징(13)으로 이루어진 노즐(10)과, 상기 노즐(10)의 하측에 나사체결로 조립되는 것으로 수지를 공급받아 하측으로 안내하도록 내부가 비어 있는 관 형상의 런너실린더(30)와, 상기 런너실린더(30)의 내부에 슬라이드 접촉되어 승강되는 것으로 수지의 공급시 상부공간인 하강챔버(a)와 하부공간인 상승챔버(b)에서 순차적으로 하강력과 상승력을 작용받아 하부에 구비된 게이트핀(55)이 금형모듈(m)의 게이트(g)를 개폐하도록 승강 동작을 수행하는 승강피스톤(50)과, 상기 노즐(10)의 내부에 설치되어 상기 상승 이동된 승강피스톤(50)에 대해 하강 탄성 지지력을 작용하는 복귀스프링(20)으로 구성되는 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.14 is an exploded perspective view of the present invention viewed from above. In the drawings, a tubular body 11 having a resin furnace 11b and an expansion space 11a formed therein as an outer body is provided to surround the outer surface of the body 11 to prevent the resin from solidifying A nozzle 10 consisting of a heater 15 and a housing 13 that is a cover element surrounding the outer surface of the heater 15, and the nozzle 10 are assembled by screwing at the lower side of the nozzle 10, and the resin is supplied and guided to the lower side The runner cylinder 30 of a tubular shape with an empty interior so as to be elevated by sliding contact with the inside of the runner cylinder 30, when the resin is supplied, the upper space of the lowering chamber (a) and the lower space of the ascending chamber (b) ) by sequentially applying a descending force and an ascending force, the lifting piston 50 which performs a lifting operation so that the gate pin 55 provided at the lower side opens and closes the gate g of the mold module m, and the nozzle 10 ), the injection pressure opening/closing control type hot runner valve device 1 is shown, which is installed in the interior of the return spring 20 to apply a downward elastic supporting force to the upwardly moved lifting piston 50 .
도 15 내지 도 17은 제2실시례에의 동작을 설명하기 위한 단면도로서, 도 16은 금형모듈(m)의 게이트(g)가 차폐된 상태이고, 도 17은 승강피스톤(50)이 일시 하강하여 금형모듈(m)의 게이트(g)를 일시 개방한 상태를 나타낸 것이며, 도 18은 승강피스톤(50)의 하강챔버(a)에 작용하는 수지압에 의해 상승 변위되어 금형의 캐비티에 대한 수지 충전을 실시하는 상태 즉, 게이트(g)를 완전 개방한 상태를 나타낸 것이다. 그리고 도 18은 도 15 내지 도 17의 도면의 이해를 돕기 위한 랜더링된 이미지 도면이고, 도 19는 제1실시례의구성을 첫번째 사출용 밸브장치로 배치 구성하고, 제2 실시례의 구성을 상기 제1실시례의 밸브장치의 사출 작용후 연동하여 동작을 수행하는 2번째 이후의 밸브장치로 구성한 것을 예시한 도면이다.15 to 17 are cross-sectional views for explaining the operation of the second embodiment. FIG. 16 is a state in which the gate g of the mold module m is shielded, and FIG. 17 is the lifting piston 50 temporarily descending. to show a state in which the gate g of the mold module m is temporarily opened, and FIG. 18 shows the resin for the cavity of the mold by upward displacement by the resin pressure acting on the descending chamber a of the lifting piston 50. It shows a state in which charging is performed, that is, a state in which the gate g is fully opened. And Figure 18 is a rendered image diagram to help the understanding of the drawings of Figures 15 to 17, Figure 19 is the configuration of the first embodiment is arranged as the first injection valve device, the configuration of the second embodiment is described above It is a view exemplifying the configuration of the second and subsequent valve devices that perform the operation in conjunction with the injection operation of the valve device of the first embodiment.
도면에는 상,하 관통되고 내부는 비어 있는 관형상을 갖는 것으로 내부 상측에 수지로(11b)가 형성되고, 그 하측으로는 상대적으로 지름을 확장하여 된 확장공간(11a)이 형성된 바디(11) 및 이 바디의 외면을 감싸도록 구비되어 수지가 고화되는 것을 방지하도록 가열을 하는 히터(15) 및 이 히터가 외부에 노출되지 않도록 감싸는 커버요소인 하우징(13)으로 이루어진 노즐(10)과, 상기 노즐(10)의 확장공간(11a)에 설치되어 하방향으로 탄성지지력을 작용하는 복귀스프링(20)과, 상기 바디(11)의 하부측에 연결 조립되는 것으로 내부 상측에 복귀스프링(20)의 하단부가 걸림되는 단차턱(31a)이 형성된 배럴부(31) 및 이 배럴부(31)의 하부에서 감소된 지름을 갖도록 연장되는 런너부(33)로 이루어진 런너실린더(30)와, 상기 런너실린더(30)의 내부에 슬라이드 접촉되면서 승강 가능하게 구비되는 것으로 상부에는 수지압에 의해 하강력을 발생시키기 위한 하강챔버(a)가 구비되고, 하부에는 수지압에 의해 상승력을 발생시키기 위한 상승챔버(b)가 마련된 것으로 상승챔버(b)가 형성된 압력작용부(51) 및 이 압력작용부(51)의 하측에 연결 구비되는 것으로 수지가 이동되는 토출통로(54h)를 형성한 토출부(54) 및 이 토출부(54)의 하부 중심에서 연장 구비되는 것으로 상기 런너부(33)와의 사이에 상승챔버(b)를 형성하는 것으로 그 끝단이 금형모듈(m)의 게이트(g)를 개폐하는 게이트핀(55)으로 이루어진 승강피스톤(50)으로 구성되는 사출압 개폐 제어형 핫런너 밸브장치(1)가 도시되어 있다.In the drawing, a body 11 having a tubular shape that is penetrated up and down and has a hollow inside, and a resin furnace 11b is formed on the upper side of the inside, and an expansion space 11a that is relatively enlarged in diameter is formed on the lower side of the body 11 and a nozzle 10 comprising a heater 15 provided to surround the outer surface of the body and heating to prevent the resin from being solidified, and a housing 13 which is a cover element that surrounds the heater so that the heater is not exposed to the outside; The return spring 20 installed in the expansion space 11a of the nozzle 10 to apply an elastic support force in the downward direction, and the return spring 20 connected to the lower side of the body 11 and assembled on the inner upper side of the return spring 20 A runner cylinder 30 comprising a barrel portion 31 having a stepped step 31a on which the lower end is caught and a runner portion 33 extending from the lower portion of the barrel portion 31 to have a reduced diameter, and the runner cylinder (30) is provided so as to be able to ascend and descend while in sliding contact with the interior of the lower chamber (a) for generating descending force by the resin pressure, and the lower chamber for generating ascending force by the resin pressure ( b) is provided, and the pressure acting part 51 having the rising chamber b is formed, and the discharge part 54 is provided connected to the lower side of the pressure acting part 51 and has a discharge passage 54h through which the resin is moved. and a gate extending from the center of the lower part of the discharge part 54 to form a rising chamber b between the runner part 33 and the end of the gate opening and closing the gate g of the mold module m An injection pressure opening/closing control type hot runner valve device 1 composed of a lifting piston 50 made of a pin 55 is shown.
이하, 도면을 참조하여 본 발명의 제2실시례에 따른 사출압 개폐 제어형 핫런너 밸브장치의 구성을 살펴보면, 크게 바디(11)와, 런너실린더(30)와, 승강피스톤(50) 그리고 복귀스프링(20)으로 구성된다.Hereinafter, referring to the drawings, looking at the configuration of the injection pressure opening/closing control type hot runner valve device according to the second embodiment of the present invention, the body 11, the runner cylinder 30, the lifting piston 50, and the return spring It consists of (20).
노즐(10)은 사출실린더로부터 수지를 공급받아 금형의 캐비티측으로 안내하기 위한 요소로, 크게 속이 빈 관형상을 갖는 바디(11)와, 이 바디(11)의 외면에 감겨져 발열작용을 하는 히터(15) 그리고 이 히터(15)를 감싸도록 구성되는 하우징(13)으로 구성된다. 이러한 노즐(10)에서 상기 바디(11)는 상,하 관통된 관형상의 부재로 제공되며, 상부는 개방되어 사출실린더로부터 용융 상태의 수지를 공급받도록 구성되고, 내부 중심은 수지로(11b)를 형성하여 공급받은 수지가 이동되는 통로를 제공하도록 구비되며, 이 수지로(11b)의 하측으로는 상기 수지로(11b)에 대해 지름을 확장하여 된 것으로 복귀스프링(20)과 런너실린더(30)가 설치되는 공간인 확장공간(11a)이 형성되는 구성이다. 그리고 상기 히터(15)는 상기 바디(11)의 외면을 감싸도록 구비되어 외부로부터 전원을 공급받아 발열을 하여 그 내부를 유동하는 수지가 고화되지 않고 용융상태를 유지하도록 하는 역할을 하며, 상기 하우징(13)은 상기 히터(15)를 외부에 노출되지 않도록 보호하는 부재이다.The nozzle 10 is an element for receiving resin from the injection cylinder and guiding it to the cavity side of the mold. 15) and a housing 13 configured to surround the heater 15 . In this nozzle 10, the body 11 is provided as a tubular member penetrating up and down, and the upper part is opened to receive the resin in the molten state from the injection cylinder, and the inner center is the resin furnace 11b. It is provided to provide a passage through which the supplied resin is moved, and a return spring 20 and a runner cylinder 30 are formed by expanding the diameter with respect to the resin furnace 11b on the lower side of the resin furnace 11b. ) is a configuration in which an extended space 11a, which is a space to be installed, is formed. And the heater 15 is provided to surround the outer surface of the body 11 and receives power from the outside to generate heat so that the resin flowing therein is not solidified and maintained in a molten state, and the housing Reference numeral 13 denotes a member that protects the heater 15 from being exposed to the outside.
런너실린더(30)는 상기 바디(11)의 하부 내측으로 그 상단부가 나사체결로 연결 조립되되, 내부 상, 하측에는 각각 지름을 감소하여 형성된 단차턱(31a)과 걸림턱(33a)이 형성되고, 하부에는 수지가 토출되는 출구(33b) 마련된 런너부(33)로 이루어지는 구성이다. 이러한 런너실린더(30)는 앞서 설명한 제1실시례의 구성과 대동소이하므로 상세한 설명은 생략한다. 다만 본 발명에서의 런너실린더(30)는 가공성과 조립성을 고려하여 바디(11)의 하부에 나사체결로 조립되는 구성을 예시하였으나 일체로 가공 성형이 가능한 경우에는 일체로 제공되어도 무방하다.The runner cylinder 30 is assembled with the upper end connected to the lower inner side of the body 11 by screwing, and on the inner upper and lower sides, a stepped protrusion 31a and a locking protrusion 33a are formed by reducing diameters, respectively, and , is a configuration consisting of a runner portion 33 provided with an outlet (33b) to the lower portion of the resin is discharged. Since the runner cylinder 30 is substantially the same as the configuration of the first embodiment described above, a detailed description thereof will be omitted. However, in the present invention, the runner cylinder 30 is exemplified by screwing to the lower part of the body 11 in consideration of workability and assembling property, but may be provided integrally if integrally processing and molding is possible.
승강피스톤(50)은 앞서 설명한 제1실시례와 그 기술적 구성의 일부가 상이한 특징을 갖는 것으로, 본 실시례에서의 승강피스톤(50)은 상기 런너실린더(30)의 내부에 승강 가능하게 구비되는 것에 의해 금형모듈(m)의 게이트(g)를 선택적으로 차폐하는 요소로서, 이러한 승강피스톤(50)은 크게 압력작용부(51)와, 토출부(54) 그리고 게이트핀(55)으로 구성된다.The lifting piston 50 has a feature different from that of the first embodiment described above in part of its technical configuration. As an element selectively shielding the gate g of the mold module m by the .
상기 압력작용부(51)는 상부에 수지로(11b)를 경유하여 공급되는 수지의 유입압에 의해 하강력이 작용하도록 하측으로 진행하면서 점차 지름이 감소되는 형상의 경사면(51a)을 형성한다. 부연 설명을 하면, 상기 압력작용부(51)는 내부에 수지가 유동되도록 속이 빈 관형상으로 제공되되, 도면을 기준으로 내부 상측에서 하향 진행하면서 지름이 감소되는 공간인 하강챔버(a)를 형성하도록 경사면(51a)을 형성하며, 상기 수지로(11b)에서 공급되는 용융수지는 상기 압력작용부(51)의 하강챔버(a) 구간에서 급격하게 유동이 저하됨에 따라 하강력을 작용하게 된다.The pressure acting part 51 forms an inclined surface 51a having a shape in which the diameter is gradually reduced while proceeding downward so that a descending force is applied by the inflow pressure of the resin supplied via the resin furnace 11b to the upper part. To elaborate, the pressure acting part 51 is provided in a hollow tubular shape so that the resin flows therein, and a descending chamber (a) is formed, which is a space in which the diameter is reduced while proceeding downward from the upper side of the inside based on the drawing. The inclined surface 51a is formed to do this, and the molten resin supplied from the resin furnace 11b acts as a descending force as the flow is rapidly reduced in the descending chamber (a) section of the pressure acting part 51 .
상기 토출부(54)는 상기 압력작용부(51)의 하측으로 감소된 지름을 가지면서 연장되되 도면을 기준으로 수평 즉, 측면방향으로 압력작용부(51)의 수지가 통과하여 상승챔버(b)측으로 유동되도록 토출통로(54h)를 형성하고, 그 하면은 하강시 걸림턱(33a)에 걸림되는 요소이다. 이때 상기 토출통로(54h)는 측면으로 하나 또는 복수 형성될 수 있다. The discharge part 54 is extended with a reduced diameter downward of the pressure acting part 51 , and the resin of the pressure acting part 51 passes in the horizontal, ie, side direction, based on the drawing to pass through the rising chamber (b). ) to form a discharge passage (54h) to flow to the side, and the lower surface is an element caught by the locking jaw (33a) when descending. In this case, one or a plurality of the discharge passages 54h may be formed on the side surface.
상기 게이트핀(55)은 상기 토출부(54)의 중심에서 하방향으로 직선 연장되어 상기 런너부(33)상에 배치되어 승강동작에 의해 그 하측 끝단부가 선택적으로 상기 금형모듈(m)의 게이트(g)를 개폐시키는 요소이다. 이러한 게이트핀(55)은 상기 런너부(33)와의 사이에 공간인 상승챔버(b)를 형성하는 구성이며, 이 상승챔버(b)에 수지압에 작용하게 되면 상승력이 발생함에 따라 상기 승강피스톤(50)이 상승 이동을 하게 된다. 부연설명을 하면, 본 발명에서의 게이트핀(55)은 상기 연결부(53)의 하부 중심에서 길게 연장되어 상기 런너부(33)의 중심에 배치되는 것에 의해 그 주위로 수지가 채워지는 공간인 상승챔버(b)가 형성되며, 그 끝단부는 금형모듈(m)의 게이트를 차폐하도록 위치된 상태에서 수지압의 작용시 승강동작에 의해 선택적으로 게이트(g)를 개폐시키는 작용을 한다.The gate pin 55 extends downward from the center of the discharge part 54 in a straight line and is disposed on the runner part 33, and the lower end thereof is selectively disposed on the gate of the mold module m by a lifting operation. (g) It is an element that opens and closes. This gate pin 55 is configured to form an ascending chamber b, which is a space, between the runner part 33, and when a resin pressure is applied to the ascending chamber b, a lifting force is generated and the lifting piston (50) makes an upward movement. To elaborate, the gate fin 55 in the present invention extends long from the lower center of the connection part 53 and is disposed in the center of the runner part 33, which is a space filled with resin around it. A chamber (b) is formed, and an end portion thereof is positioned to shield the gate of the mold module (m) and selectively opens and closes the gate (g) by a lifting operation when the resin pressure is applied.
복귀스프링(20)은 상기 노즐(10)의 확장공간(11a) 상부에 상단이 걸림되고 하단은 상기 런너실린더(30)의 내부 일측에 형성된 단차턱(31a)에 걸림되는 구성이며, 상기 압력작용부(51)의 상단이 접촉되는 것에 의해 승강피스톤(50)의 상승시 하방향으로의 탄성력을 작용하는 역할을 한다.The return spring 20 has an upper end hooked on the upper part of the expansion space 11a of the nozzle 10 and a lower end hooked with a stepped jaw 31a formed on one side of the inner side of the runner cylinder 30, and the pressure action When the lifting piston 50 is raised by the upper end of the part 51 in contact, it serves to apply an elastic force in the downward direction.
상기와 같이 구성되는 본 발명의 제2실시례에 따른 사출압 개폐 제어형 핫런너 밸브장치의 동작을 설명하기로 한다.The operation of the injection pressure opening/closing control type hot runner valve device according to the second embodiment of the present invention configured as described above will be described.
노즐(10)은 도 15 및 도 18의 도면 좌측에 나타내 보인 바와 같이 사출 대기 상태에서는 승강피스톤(50)의 게이트핀(55)이 금형모듈(m)의 게이트(g)를 차폐한 상태를 이루는데, 이 상태에서 사출실린더로부터 용융 상태의 수지가 상기 노즐(10)을 구성하는 바디(11)의 수지로(11b)를 경유하여 상기 승강피스톤(50)의 압력작용부(51)에 작용하면, 상기 승강피스톤(50)에는 수지압에 의한 하강압력이 작용함에 따라 도 16 및 도 18의 가운데에 위치한 도면에 나타내 보인 바와 같이 일시 하강하여 금형모듈(m)의 게이트(g)의 일부를 개방한 상태를 이룬다. The nozzle 10 forms a state in which the gate pin 55 of the elevating piston 50 shields the gate g of the mold module m in the injection standby state as shown on the left side of the drawings in FIGS. 15 and 18 . However, in this state, when the resin in the molten state from the injection cylinder acts on the pressure acting part 51 of the lifting piston 50 via the resin furnace 11b of the body 11 constituting the nozzle 10, , as shown in the drawings located in the middle of FIGS. 16 and 18 as the downward pressure by the resin pressure acts on the lifting piston 50, it temporarily descends to open a part of the gate g of the mold module m. form a state
이어서, 상기 압력작용부(51)에 작용하는 수지가 토출통로(54h)를 통과하여 상승챔버(b)에 작용하면, 상기 승강피스톤(50)은 하강챔버(a)에 작용하는 압력에 비해 상승챔버(b)에 작용하는 압력이 큼에 따라 결과적으로 상승압력에 의한 상승 변위를 하게 되고, 이때 상기 복귀스프링(20)은 수축되어 탄성 변위됨에 따라 도 17 및 도 18의 우측 도면과 같이 게이트(g)에 대한 완전 개방을 이루어 금형의 캐비티(c)에 대한 수지 충전을 실시하게 된다. 끝으로, 금형의 캐비티(c)에 대한 수지의 충전이 완료되면 상기 승강피스톤(50)의 상부와 하부 공간에서 압력평형이 발생함에 따라 상기 승강피스톤(50)은 복귀스프링(20)의 탄성 복귀력에 의해 하강하여 도 15와 같이 게이트(g)를 차폐한 상태로 돌아가게 된다.Then, when the resin acting on the pressure acting part 51 passes through the discharge passage 54h and acts on the rising chamber b, the lifting piston 50 rises compared to the pressure acting on the lowering chamber a. As the pressure acting on the chamber (b) increases, as a result, upward displacement occurs due to the upward pressure, and at this time, the return spring 20 contracts and elastically displaces the gate ( g) is fully opened, and resin filling is performed on the cavity (c) of the mold. Finally, when the filling of the resin into the cavity (c) of the mold is completed, as pressure equilibrium occurs in the upper and lower spaces of the lifting piston (50), the lifting piston (50) elastically returns the return spring (20) It descends by the force and returns to the state in which the gate (g) is shielded as shown in FIG.
한편, 도 19는 사출 실린더와 매니폴드를 통해 제일 먼저 수지를 공급받는 메인 밸브장치(main)를 본 발명의 제1실시례로 배치 구성하고, 이후 두번째(sub1)와 세번째(sub1) 등등의 순으로는 본 발명의 제2실시례의 밸브장치를 배치 구성한 것을 나타낸 것으로, 도면을 기준으로 제일 상단에 위치한 STEP1은 제일 좌측에 위치한 제1실시례의 밸브장치인 (main)에 수지가 공급되어 금형의 캐비티에 대한 수지의 주입이 시작되는 상태를 나타낸 것이고 이때의 동작은 앞서 도 5 내지 도 7에서와 같이 이루어지며, (sub1)과 (sub2)의 밸브장치는 사출 실린더로와 매니폴드를 경유한 수지의 공급압이 내부에 작용하는 것에 의해 각각의 게이트핀은 일시 하강한 상태를 유지하게 된다. 이어서, STEP2는 상기 제1실시례의 밸브장치인 (main)을 통해 주입되는 수지가 일측에 근접 배치된 제2실시례의 밸브장치인 (sub1)이 연결된 캐비티 공간측으로 유입 유동되고, 이때의 상기 (sub1)은 일시적으로 게이트핀(55)이 일시적으로 상승 이동된 상태를 이루게 된다. On the other hand, FIG. 19 shows the arrangement and configuration of the main valve device (main) that first receives the resin through the injection cylinder and the manifold in the first embodiment of the present invention, and then the second (sub1), the third (sub1), etc. shows the arrangement of the valve device of the second embodiment of the present invention, and STEP1, located at the top of the drawing, is supplied with resin to the valve device (main) of the first embodiment located at the leftmost side of the mold. shows the state in which injection of the resin into the cavity of As the resin supply pressure acts on the inside, each gate fin maintains a temporarily lowered state. Next, in STEP2, the resin injected through the valve device (main) of the first embodiment flows in and flows into the cavity space side to which the valve device (sub1) of the second embodiment is disposed close to one side, at this time At (sub1), the gate fin 55 is temporarily moved upward.
STEP3는 금형의 캐비티에 주입되는 수지가 상기 (sub1)을 경유함과 동시에 상기 (sub1)의 게이트핀(55)은 완전 상승 동작을 이루어 게이트를 개방하여 수지를 금형의 캐비티 측으로 공급하는 상태를 이루고, 이러한 (sub1)을 경유한 수지는 그 일측에 배치된 (sub2)가 접속한 캐비티측으로 유동된다. In STEP3, the resin injected into the cavity of the mold passes through (sub1), and at the same time, the gate pin 55 of (sub1) performs a full upward operation, opens the gate, and supplies the resin to the cavity of the mold. , the resin passing through (sub1) flows to the cavity side connected to (sub2) disposed on one side thereof.
STEP4는 (main)과 (sub1)을 경유한 수지가 (sub2)를 통과하게 되면 상기 (sub2)의 게이트핀은 캐비티의 수지압력에 의해 상승 이동을 이루어 게이트를 개방한 상태를 이루어 결과적으로 수지를 캐비티내로 공급하게 되며, 이때의 (main), (sub1), (sub1)은 모두 게이트에 대한 개방 상태를 유지한다. In STEP4, when the resin passing through (main) and (sub1) passes through (sub2), the gate pin of (sub2) moves upward by the resin pressure of the cavity to open the gate, resulting in the resin It is supplied into the cavity, and (main), (sub1), and (sub1) all maintain an open state for the gate.
STEP5는 금형의 캐비티에 대한 수지 충전이 모두 완료된 상태를 나타낸 것으로 이때의 (main)과 (sub1) 및 (sub2)는 노즐 내부의 전체 압력과 금형의 캐비티 내부와 압력 평형이 이루어짐에 따라 복귀스프링의 복원력에 의해 승강피스톤이 하강 이동함으로써 게이트를 차단한 상태를 이룬다. STEP6은 금형의 캐비티에서 성형된 성형품의 취출시의 노즐의 상태를 나타낸 것이다. STEP5 shows the state in which the resin filling of the cavity of the mold is completed. At this time, (main), (sub1), and (sub2) are the total pressure inside the nozzle and the pressure equilibrium with the inside of the cavity of the mold, so that the return spring The lifting piston moves down by the restoring force, thereby forming a state in which the gate is blocked. STEP6 shows the state of the nozzle at the time of taking out the molded article molded from the cavity of the mold.

Claims (6)

  1. 내부 중심으로 용융수지가 통과하는 수지로 및 이 수지로를 확장하여 확장공간이 연결형성된 바디와, 이 바디의 하부 내측에 구비되어 수지를 공급받아 안내하는 것으로 그 하측으로는 감소된 지름을 가지면서 수지가 토출되는 출구가 마련된 런너부를 구비한 런너실린더로 이루어진 노즐;A resin passage through which the molten resin passes through the inner center and a body in which an expansion space is formed by extending the resin passage, and a body provided in the lower inner side of the body to receive and guide the resin while having a reduced diameter on the lower side a nozzle comprising a runner cylinder having a runner unit provided with an outlet through which resin is discharged;
    상기 런너실린더의 내부에 승강되게 구비되되 그 상부에는 수지의 유입압에 의해 하강력이 작용하도록 하는 압력작용부 및 이 압력작용부의 하측에 연결 구비되되 수지가 통과하는 통로를 형성한 연결부 및 이 연결부의 중심에서 연장되어 상기 런너부상에 배치되면서 선택적으로 게이트를 개폐시키는 것으로 런너부와의 사이에 상승챔버를 형성하여 통로를 경유한 수지압의 작용시 상승력이 작용하도록 유도하는 게이트핀을 구비한 승강피스톤;A pressure acting part that is provided to be raised and lowered inside the runner cylinder and a lowering force is applied by the inflow pressure of the resin on the upper part, and a connection part and this connection part connected to the lower side of the pressure acting part to form a passage through which the resin passes, and this connection part elevating and lowering having a gate pin extending from the center of piston;
    상기 확장공간의 상부측에 상단이 걸림되고 하단은 상기 런너실린더의 일측에 형성된 단차턱에 걸림되되 상기 압력작용부의 상단이 접촉되는 것에 의해 승강피스톤의 상승시 하방향으로의 탄성력을 작용하는 복귀스프링;을 포함하여 구성된 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치.The upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw formed on one side of the runner cylinder, and the upper end of the pressure applying part is in contact with a return spring that applies an elastic force in the downward direction when the lifting piston is raised. Injection pressure opening/closing control type hot runner valve device, characterized in that it comprises a.
  2. 내부 중심으로 용융수지가 통과하는 수지로 및 이 수지로를 확장하여 된 확장공간이 연결 형성된 바디와, 이 바디의 하부 내측으로 상단부가 연결 조립되되, 내부 상, 하측에는 각각 지름을 감소하여 형성된 단차턱과 걸림턱이 형성되고, 하부는 수지가 토출되는 출구가 마련된 런너부로 된 런너실린더로 이루어진 노즐;The resin passage through which the molten resin passes through the inner center and the expansion space formed by extending the resin passage are connected and assembled, and the upper end is connected to the lower inner side of the body, and the inner upper and lower sides are formed by reducing diameters, respectively. a nozzle comprising a runner cylinder having a chin and a locking protrusion, the lower part of which is provided with an outlet for discharging the resin;
    상기 런너실린더의 내부에 승강 구비되는 것으로 그 상부에는 수지의 유입압에 의해 하강력이 작용하는 압력작용부 및 이 압력작용부의 하측으로 감소된 지름을 가지면서 연장되되 측면으로 수지가 통과하여 배출되도록 토출통로를 형성하고 그 하면은 하강시 걸림턱에 걸림되는 토출부 및 이 토출부의 중심에서 감소된 지름을 가지면서 연장되어 상기 런너부상에 배치되고 그 끝단부가 승강 변위에 의해 게이트를 개폐시키는 것으로 상기 런너부와의 사이에 상승챔버를 형성하는 게이트핀을 구비한 승강피스톤;The runner cylinder is raised and lowered inside the runner cylinder, and the upper part has a pressure-acting part on which a descending force is applied by the inflow pressure of the resin, and the pressure-acting part is extended with a reduced diameter to the lower side so that the resin passes through the side and is discharged. A discharge passage is formed, and the lower surface thereof extends with a reduced diameter from the center of the discharge portion and the discharge portion caught by the locking jaw when descending, is disposed on the runner portion, and the end portion opens and closes the gate by lifting and lowering displacement. an elevating piston having a gate fin forming a rising chamber between the runner and the runner;
    상기 확장공간의 상부측에 상단이 걸림되고 하단은 상기 단차턱에 걸림되되 상기 압력작용부의 상단이 접촉되는 것에 의해 승강피스톤의 상승시 하방향으로의 탄성력을 작용하는 복귀스프링;을 포함하여 구성된 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치.The upper end is caught on the upper side of the expansion space and the lower end is caught on the stepped jaw, and a return spring that applies an elastic force in the downward direction when the lifting piston is raised by contacting the upper end of the pressure applying part. Injection pressure opening/closing control type hot runner valve device.
  3. 제 1항에 있어서, 상기 승강피스톤은 내부에 하향 진행하면서 지름이 감소되는 공간인 하강챔버를 형성하여 수지압력이 작용하도록 유도하는 경사면을 갖는 압력작용부; 상기 압력작용부의 하부에서 감소된 지름으로 연결 되는 관형상의 부재로 동심원을 중심으로 방사상으로 하나 또는 복수의 통로를 형성하여 하강챔버의 수지가 이동될 수 있도록 하는 연결부; 상기 연결부의 하부 중심에서 길게 연장되어 런너부 상에 배치되는 것에 의해 그 주위로 상승챔버가 형성된 것으로 끝단부는 금형모듈의 게이트를 차폐하도록 위치된 상태에서 수지압의 작용시 승강동작에 의해 선택적으로 개방하는 게이트핀;으로 구성된 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치.According to claim 1, wherein the lifting piston is a pressure acting portion having an inclined surface for inducing the resin pressure to act by forming a descending chamber that is a space in which the diameter decreases while proceeding downward; a tubular member connected with a reduced diameter at the lower portion of the pressure-acting part, and a connection part for forming one or a plurality of passages radially around a concentric circle to allow the resin of the descending chamber to move; An ascending chamber is formed around it by extending long from the lower center of the connection part and being disposed on the runner part, and the end part is positioned to shield the gate of the mold module and selectively opened by the lifting operation when the resin pressure is applied An injection pressure opening/closing control type hot runner valve device comprising a gate pin.
  4. 제 1항 또는 제 2항 중 어느 한 항에 있어서, 상기 런너실린더는 상기 바디의 하부에 나사체결로 연결되는 것으로 내부 지름은 상기 확장공간에 대응하는 지름을 갖도록 형성되되, 내부 상측에는 복귀스프링의 하단이 걸림되도록 지름을 감소하여 된 단차턱을 형성한 관 형상의 배럴부; 상기 배럴부의 하부에 일체로 연장 구비되는 것으로 상대적으로 감소된 지름을 갖는 것에 의해 상기 게이트핀과의 사이에 공간인 상승챔버를 형성하고, 상기 금형모듈의 게이트 일측에 하단부가 접속되는 런너부;로 구성된 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치. According to any one of claims 1 or 2, wherein the runner cylinder is connected to the lower portion of the body by screwing, the inner diameter is formed to have a diameter corresponding to the expansion space, the inner upper side of the return spring A tubular barrel portion having a stepped step formed by reducing the diameter so that the lower end is caught; A runner part extending integrally to the lower part of the barrel and having a relatively reduced diameter to form an ascending chamber that is a space between the gate pin and a lower end connected to one side of the gate of the mold module; Injection pressure opening/closing control type hot runner valve device, characterized in that it is configured.
  5. 제 1항 또는 제 2항 중 어느 한 항에 있어서, 3. The method of any one of claims 1 or 2,
    상기 노즐은 상,하 관통된 관형상의 부재로 상부에는 수지를 공급받아 유동하는 수지로가 형성되고, 이 수지로의 하측으로는 수지로에 대해 지름을 확장하여 된 것으로 복귀스프링이 구비되는 확장공간을 형성한 바디; 상기 바디의 외면을 감싸도록 구비되어 수지로를 경유하는 수지가 고화되는 것을 방지하는 히터; 상기 히터를 외부에 노출되지 않게 수용하는 하우징;으로 구성된 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치. The nozzle is a tubular member penetrating up and down, and a resin passage that flows by receiving a resin is formed in the upper part, and the diameter of the resin passage is expanded to the lower side of this resin passage, and a return spring is provided. body forming space; a heater provided to surround the outer surface of the body to prevent the resin passing through the resin furnace from being solidified; An injection pressure opening/closing control type hot runner valve device comprising a housing that accommodates the heater so as not to be exposed to the outside.
  6. 제 1항 또는 제 2항 중 어느 한 항에 있어서, 3. The method of any one of claims 1 or 2,
    상기 게이트핀은 하단부에 상기 게이트를 차폐하는 크기를 갖는 것으로 측면에 수직하는 방향으로 게이트와의 사이에 통기공을 형성한 런너팁을 구비한 것을 특징으로 하는 사출압 개폐 제어형 핫런너 밸브장치.The gate pin has a size for shielding the gate at the lower end and has a runner tip having a vent hole formed between the gate and the gate in a direction perpendicular to the side.
PCT/KR2021/012120 2021-03-25 2021-09-07 Injection pressure opening/closing control type hot runner valve device WO2022203135A1 (en)

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Application Number Priority Date Filing Date Title
KR20210039140 2021-03-25
KR10-2021-0039140 2021-03-25
KR10-2021-0118301 2021-09-06
KR1020210118301A KR102522069B1 (en) 2021-03-25 2021-09-06 A Gate Type Hot Runner Valve System on Pressure Equilibrium

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001088171A (en) * 1999-09-24 2001-04-03 Nippon Tekunika Kk Injection molding apparatus
KR20060042878A (en) * 2004-02-05 2006-05-15 피사 코포레이션 Valve nozzle
KR200418316Y1 (en) * 2006-03-15 2006-06-09 시ㆍ화인테크놀로지 주식회사 The nozzle for an injection molder
KR101718324B1 (en) * 2017-01-13 2017-03-21 김혁중 Sidegate Valve system of Hotrunner
KR102010997B1 (en) * 2017-01-13 2019-08-14 김혁중 Sidegate Valve system of Hotrunner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001088171A (en) * 1999-09-24 2001-04-03 Nippon Tekunika Kk Injection molding apparatus
KR20060042878A (en) * 2004-02-05 2006-05-15 피사 코포레이션 Valve nozzle
KR200418316Y1 (en) * 2006-03-15 2006-06-09 시ㆍ화인테크놀로지 주식회사 The nozzle for an injection molder
KR101718324B1 (en) * 2017-01-13 2017-03-21 김혁중 Sidegate Valve system of Hotrunner
KR102010997B1 (en) * 2017-01-13 2019-08-14 김혁중 Sidegate Valve system of Hotrunner

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