CN214111308U - Needle valve type hot runner system - Google Patents
Needle valve type hot runner system Download PDFInfo
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- CN214111308U CN214111308U CN202023263651.XU CN202023263651U CN214111308U CN 214111308 U CN214111308 U CN 214111308U CN 202023263651 U CN202023263651 U CN 202023263651U CN 214111308 U CN214111308 U CN 214111308U
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Abstract
The utility model discloses a needle valve formula hot runner system, it includes that needle, flow distribution plate, hot spout chew subassembly and drive the flexible actuating mechanism of needle, the one end that the subassembly was chewed to hot spout is located to the flow distribution plate, and the other end that the subassembly was chewed to hot spout is the discharge end, the flow distribution plate with hot spout the needle hole that the subassembly had the intercommunication, the needle wear to establish with the needle hole is downthehole, is equipped with the movable block in actuating mechanism's the casing, and the lateral wall of movable block has the round bead, and the bead divide into first cavity and second cavity with the cavity, and the one end of movable block can be dismantled and be connected with the stopper. The system can effectively improve the stability of the valve needle, and the branch channel is also arranged at the end part of the valve needle, so that the problems of temperature loss and unsmooth flow caused by too early diversion of fluid can be reduced. The stability of air pressure driving can be ensured through the structure of the convex edge; the stopper modular design, the not unidimensional stopper of replacement during the use can.
Description
Technical Field
The utility model belongs to the technical field of the mould, especially, relate to a hot runner system.
Background
The hot runner system is generally applied to an injection mold, and the plastic of a runner and a sprue is ensured to be kept in a molten state by a heating method, the hot runner system generally comprises a hot nozzle, a splitter plate, a temperature control box, accessories and the like, and the hot nozzle generally comprises two types: the hot nozzle form directly determines the selection of the hot runner system and the manufacture of a mould, so that the hot runner system is divided into an open hot runner system and a needle valve type hot runner system correspondingly;
the needle valve type hot runner system drives the movement of a valve needle through a pneumatic component to realize the control of the flow of the plastic fluid; in the prior art, the flow passages in the system are divided by the dividing plate and enter the valve needle hole after being divided, and the valve needle is generally longer, so that the processing requirements on the valve needle, the valve needle hole and other parts are very high in order to obtain a better fluid flowing effect, and the longer valve needle is difficult to avoid shaking when in use, so that the outflow of fluid is influenced.
In addition, the valve needle of the needle valve type hot runner system is driven by compressed air, in the prior art, the driving mechanism for driving the valve needle is designed by referring to an air cylinder, and the pressure maintaining of the driving force is not stable; in addition, different molds have different requirements on the telescopic stroke of the valve needle, namely, each hot runner system has different requirements on the movement stroke of the driving mechanism, so that the driving mechanism cannot achieve the modular design of a unified structure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a needle valve formula hot runner system, can effectual improvement needle stability, reduces the machining precision demand of whole needle mechanism to the subchannel also sets up the tip at the needle, can reduce the too early reposition of redundant personnel of fluid and the temperature loss that causes, and the not smooth problem of flow. The stability of air pressure driving can be ensured through the structure of the convex edge, and the pressure maintaining stability after the moving block moves is ensured; the limiting blocks are made into a modular design, and the limiting blocks with different sizes can be replaced when the device is used.
In order to solve the technical problem, the utility model discloses a technical scheme of adoption as follows:
a needle valve type hot runner system comprises a valve needle, a flow distribution plate, a hot nozzle assembly and a driving mechanism for driving the valve needle to stretch and retract, wherein the driving mechanism is driven by compressed air;
the flow distribution plate is arranged at one end of the hot nozzle component, the other end of the hot nozzle component is a discharge end, the flow distribution plate and the hot nozzle component are provided with communicated valve needle holes, the valve needle penetrates through the valve needle hole, and the valve needle can reciprocate along the axial direction of the valve needle;
the flow distribution plate and the hot nozzle assembly are provided with communicated main flow channels, the discharge end of the hot nozzle assembly is provided with a valve needle sleeve, the valve needle sleeve is provided with a flow distribution channel communicated with the main flow channel and a positioning hole communicated with the valve needle hole, the flow distribution channel is communicated with the positioning hole, the valve needle penetrates through the positioning hole, and the valve needle is in clearance fit with the positioning hole;
the driving mechanism comprises a shell, the shell is provided with a cylindrical cavity, a movable block is arranged in the cavity and can move along the axial direction of the cavity, and a valve needle is fixedly connected with the movable block;
the outer side wall of the movable block is provided with a circle of convex edge, the side wall of the convex edge is provided with a circle of groove for mounting a sealing ring, the cavity is divided into a first cavity and a second cavity by the convex edge, the first cavity and the second cavity are both provided with air holes, and compressed air is injected into the first cavity or the second cavity to push the movable block to move;
the one end of movable block can be dismantled and be connected with the stopper, needle fixed connection in the other end of movable block, and certainly wear out in the casing.
Further say, the movable block is including flexible piece and fixed block, the bead is located the lateral wall of flexible piece, flexible piece has the recess, the fixed block can be put into in the recess and with flexible piece fixed connection, the fixed block has the edge the through-hole of the axial setting of casing, the step hole of through-hole for having two kinds of apertures, the needle can pass the through-hole and by the step hole is spacing.
Further, the fixed block with flexible piece is clearance fit, and is equipped with the sealing washer between the two, the fixed block with flexible piece passes through the jump ring and fixes.
Furthermore, one end of the fixing block extends out of the groove and penetrates out of the shell, and the fixing block and the shell are sealed through a sealing ring.
Furthermore, one end of the movable block is provided with a convex column, and the limiting block is in threaded connection with the convex column.
Furthermore, the housing comprises a column shell and two end covers fixedly connected to two ends of the column shell, wherein one of the end covers is provided with a through hole for the valve needle to penetrate out.
Further, the positioning hole is a stepped hole with two different diameters, wherein the smaller diameter portion is in clearance fit with the valve needle, and the larger diameter portion is communicated with the branch passage.
Further, the discharge end of the hot nozzle assembly is provided with a mounting hole, and the valve needle sleeve is fixedly mounted in the mounting hole.
Furthermore, a gap is formed between the outer side wall of the valve needle sleeve and the inner side wall of the mounting hole, a flange is arranged at one end, inserted into the mounting hole, of the valve needle sleeve, the locking piece is inserted into the gap and fixedly connected with the hot nozzle assembly, and the locking piece can abut against the flange to fix the valve needle sleeve.
Furthermore, the valve needle cover is copper valve needle cover, the needle is equipped with 3, 3 the needle use the axis of hot nozzle is central circumference equipartition.
The utility model has the advantages that:
the utility model discloses with the tip of the locating part setting of needle at the needle, can effectual improvement needle stability, reduce the machining precision demand of whole needle mechanism to the subchannel also sets up the tip at the needle, can reduce the too early reposition of redundant personnel of fluid and the temperature loss that causes, and the not smooth problem of flow.
The positioning holes are used for respectively positioning and guiding two stepped holes with different diameters, the positioning holes have the functions of positioning the valve needle and a flow channel simply, the valve needle only contacts fluid at the end part to control the fluid, most of the fluid flows in the same flow channel in the hot nozzle, and the flowability is very good.
The driving mechanism divides the cavity into two parts which are not communicated through the convex edge, and drives the movable block by respectively injecting compressed air into the two cavities, so that the valve needle fixedly connected with the movable block is driven to stretch and retract;
the movable block can be dismantled and be connected with the stopper, through the motion stroke of the distance restriction movable block of stopper and casing, can make actuating mechanism into the modularized design, during the use replace not unidimensional stopper can.
The movable block includes flexible piece and fixed block, and the fixed block has the edge the through-hole of the axial setting of casing, the step hole of through-hole for having two kinds of apertures, and the needle can pass the through-hole and spacing by the step hole, through step hole installation needle to it is fixed to push down the needle through the mode of combination assembly, simple structure, and the needle of installation can have very good stability and life, and the change of needle is also more convenient moreover.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a valve pin type hot runner system according to the present invention;
fig. 2 is a cross-sectional view of the valve needle and thermal nozzle assembly of the present invention;
fig. 3 is a cross-sectional view of the valve needle sleeve of the present invention;
fig. 4 is an exploded view of the valve needle and thermal nozzle assembly of the present invention;
fig. 5 is an exploded view of the driving mechanism of the present invention;
fig. 6 is a cross-sectional view of the drive structure of the present invention;
fig. 7 is an exploded schematic view of the movable block of the present invention;
the parts in the drawings are marked as follows:
the valve needle 1, the diversion plate 2, the thermal nozzle assembly 3, the valve needle hole 31, the main flow passage 32, the mounting hole 33, the valve needle sleeve 4, the diversion passage 41, the positioning hole 42, the flange 43, the locking piece 5, the driving mechanism 6, the housing 61, the movable block 62, the convex rib 621, the ring groove 626, the first cavity 611, the second cavity 612, the limiting block 622, the column housing 613, the end cover 614, the telescopic block 623, the fixing block 624, the groove 6231, the through hole 6241, the convex column 625 and the snap spring 63.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Example (b):
a valve pin hot runner system, as shown in fig. 1-4: the hot runner system comprises a valve needle 1, a flow distribution plate 2 and a hot nozzle component 3;
the flow distribution plate is arranged at one end of the hot nozzle component, the other end of the hot nozzle component is a discharge end, the flow distribution plate and the hot nozzle component are provided with a valve needle hole 31 which is communicated, the valve needle penetrates through the valve needle hole, and the valve needle can reciprocate along the axial direction of the valve needle;
the flow distribution plate and the hot nozzle component are provided with a main flow passage 32 communicated with each other, the discharge end of the hot nozzle component is provided with a valve needle sleeve 4, the valve needle sleeve is provided with a flow distribution passage 41 communicated with the main flow passage and a positioning hole 42 communicated with the valve needle hole, the flow distribution passage is communicated with the positioning hole, the valve needle penetrates through the positioning hole, and the valve needle is in clearance fit with the positioning hole.
The utility model discloses a hot runner system will the locating part setting of needle is at the tip of needle, and the stability that can effectual improvement needle reduces the machining precision demand of whole needle mechanism to the subchannel also sets up the tip at the needle, can reduce the too early reposition of redundant personnel of fluid and the temperature loss who causes, and the not smooth problem of flow.
In this embodiment, the needle is equipped with 3, 3 the needle with the axis of hot nozzle is central circumference equipartition, and the setting of 3 needles is favorable to in the even entering mould of fluid to there is not higher internal pressure, can prevent that the product of moulding plastics from producing the bad condition of gas pocket and wire drawing.
This embodiment is shown in fig. 2 and 3: the positioning hole is a stepped hole with two different diameters, wherein the part with the smaller diameter is in clearance fit with the valve needle, and the part with the larger diameter is communicated with the branch channel.
In brief, the positioning hole has the functions of positioning the valve needle and the flow channel, only the end part of the valve needle is contacted with fluid to control the fluid, most of the fluid flows in the same flow channel in the hot nozzle, and the fluidity is very good.
As shown in fig. 2 and 4: the discharge end of the hot nozzle assembly has a mounting hole 33 in which the valve needle sleeve is fixedly mounted.
A gap is formed between the outer side wall of the valve needle sleeve and the inner side wall of the mounting hole, a flange 43 is arranged at one end of the valve needle sleeve inserted into the mounting hole, the valve needle sleeve further comprises a locking piece 5, the locking piece is inserted into the gap and is fixedly connected with the hot nozzle assembly, the locking piece can be abutted against the flange to fix the valve needle sleeve, and in the embodiment, the locking piece and the hot nozzle assembly are in threaded connection.
This embodiment comes fixed mounting valve needle cover through the locking piece, and the modular design of the product of being convenient for to the hot runner system of different specifications, only need to change the needle with the valve needle cover can, the valve needle cover need not process and hot nozzle connection's structure yet, makes the convenience.
In this embodiment, the valve needle cover is made of copper, and the copper material has fast heat conduction and good heat storage, and can ensure the temperature of fluid, thereby ensuring the fluidity of the fluid.
The present embodiment further includes a driving mechanism 6 connected to the needle to drive the reciprocating movement of the needle, the driving mechanism being driven by compressed air.
The driving mechanism is shown in fig. 5 and 6: the valve needle device comprises a shell 61, wherein the shell is provided with a cylindrical cavity, a movable block 62 is arranged in the cavity and can move along the axial direction of the cavity, and a valve needle 1 is fixedly connected with the movable block;
the outer side wall of the movable block is provided with a circle of convex edge 621, the side wall of the convex edge is provided with a circle of groove 626 for installing a sealing ring, the cavity is divided into a first cavity 611 and a second cavity 612 by the convex edge, the first cavity and the second cavity are both provided with air holes, and the movable block is pushed to move by injecting compressed air into the first cavity or the second cavity;
one end of the movable block can be dismantled and be connected with stopper 622, needle fixed connection in the other end of movable block, and certainly wear out in the casing.
The valve needle driving mechanism of the utility model divides the cavity into two parts which are not communicated through the convex edge, and realizes the driving of the movable block by respectively injecting compressed air into the two cavities, thereby driving the extension of the valve needle fixedly connected with the movable block; the movable block can be dismantled and be connected with the stopper, through the motion stroke of the distance restriction movable block of stopper and casing, be exactly the movable block through the not motion space of the stopper restriction movable block of co-altitude in the motion to realize the control of stroke.
In this embodiment, the housing is as shown in fig. 6: comprises a column shell 613 and two end covers 614 fixedly connected with two ends of the column shell respectively, wherein one end cover is provided with a through opening 6141 through which the valve needle passes;
the casing of this embodiment that promptly is the components of a whole that can function independently structure, and the components of a whole that can function independently setting has the advantage of being convenient for processing, and second the maintenance in later stage is also very convenient, and in this embodiment, column shell and two the end cover is interference connection, and the casing of interference connection can satisfy simultaneously and connect stable and sealed requirement.
The movable block is shown in fig. 7: the needle valve comprises a telescopic block 623 and a fixing block 624, wherein the convex rib is positioned on the side wall of the telescopic block, the telescopic block is provided with a groove 6231, the fixing block can be placed in the groove and fixedly connected with the telescopic block, the fixing block is provided with a through hole 6241 arranged along the axial direction of the shell, the through hole is a stepped hole with two apertures, and the needle can penetrate through the through hole and is limited by the stepped hole;
the valve needle is installed through the stepped hole and is pressed and fixed in a combined and assembled mode, the structure is simple, the installed valve needle has very good stability and service life, the valve needle is convenient to replace, in the embodiment,
the fixed block with flexible piece is clearance fit, and is equipped with the sealing washer between the two, the fixed block with flexible piece passes through jump ring 63 to be fixed, can understand, hesitation is clearance fit between fixed block and the flexible piece, and consequently the assembly is also very convenient, and the rethread jump ring is fixed, and the jump ring is the standard component, and its dismouting is all very convenient.
One end of the fixing block extends out of the groove and penetrates out of the shell, and the fixing block is sealed with the shell through a sealing ring.
In this embodiment, the one end of movable block has a projection 625, stopper threaded connection in the projection, threaded connection's stopper installation is changed all very conveniently, and threaded connection structure has better stability for linear motion's activity is fast moreover, also is difficult for taking off.
The working principle of the utility model is as follows:
the positioning part of the valve needle is arranged at the end part of the valve needle in the hot runner system, so that the stability of the valve needle can be effectively improved, the processing precision requirement of the whole valve needle mechanism is reduced, and the branch flow passage is also arranged at the end part of the valve needle, so that the problems of temperature loss and unsmooth flow caused by premature flow distribution of fluid can be reduced.
The positioning holes are used for respectively positioning and guiding two stepped holes with different diameters, the positioning holes have the functions of positioning the valve needle and a flow channel simply, the valve needle only contacts fluid at the end part to control the fluid, most of the fluid flows in the same flow channel in the hot nozzle, and the flowability is very good.
Come fixed mounting valve needle cover through the locking piece, the modular design of the product of being convenient for to the hot runner system of different specifications, only need to change the needle with the valve needle cover can, the valve needle cover also need not process and hot nozzle connection's structure, and it is convenient to make.
The valve needle driving mechanism divides the cavity into two parts which are not communicated through the convex edge, and drives the movable block by respectively injecting compressed air into the two cavities, so that the valve needle fixedly connected with the movable block is driven to stretch, and the structure of the convex edge can ensure the stability of air pressure driving and the pressure maintaining stability after the movable block moves; the movable block can be dismantled and be connected with the stopper, through the motion stroke of the distance restriction movable block of stopper and casing, be exactly the movable block through the not motion space of the stopper restriction movable block of co-altitude in the motion to realize the control of stroke.
The movable block includes flexible piece and fixed block, and the fixed block has the edge the through-hole of the axial setting of casing, the step hole of through-hole for having two kinds of apertures, and the needle can pass the through-hole and spacing by the step hole, through step hole installation needle to it is fixed to push down the needle through the mode of combination assembly, simple structure, and the needle of installation can have very good stability and life, and the change of needle is also more convenient moreover.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.
Claims (10)
1. A needle valve hot runner system, comprising: the device comprises a valve needle (1), a flow distribution plate (2), a hot nozzle component (3) and a driving mechanism (6) for driving the valve needle to stretch and retract, wherein the driving mechanism is driven by compressed air;
the flow distribution plate is arranged at one end of the hot nozzle component, the other end of the hot nozzle component is a discharge end, the flow distribution plate and the hot nozzle component are provided with communicated valve needle holes (31), the valve needle penetrates through the valve needle holes, and the valve needle can reciprocate along the axial direction of the valve needle;
the flow distribution plate and the hot nozzle assembly are provided with a main flow passage (32) which is communicated, the discharge end of the hot nozzle assembly is provided with a valve needle sleeve (4), the valve needle sleeve is provided with a flow distribution passage (41) which is communicated with the main flow passage and a positioning hole (42) which is communicated with the valve needle hole, the flow distribution passage is communicated with the positioning hole, the valve needle is arranged in the positioning hole in a penetrating way, and the valve needle is in clearance fit with the positioning hole;
the driving mechanism comprises a shell (61), the shell is provided with a cylindrical cavity, a movable block (62) is arranged in the cavity and can move along the axial direction of the cavity, and the valve needle is fixedly connected to the movable block;
the outer side wall of the movable block is provided with a circle of convex edge (621), the side wall of the convex edge is provided with a circle of groove for mounting a sealing ring, the cavity is divided into a first cavity (611) and a second cavity (612) by the convex edge, the first cavity and the second cavity are both provided with air holes, and compressed air is injected into the first cavity or the second cavity to push the movable block to move;
one end of the movable block can be dismantled and be connected with stopper (622), needle fixed connection in the other end of movable block, and certainly wear out in the casing.
2. The needle valve hot runner system according to claim 1, wherein: the movable block includes flexible piece (623) and fixed block (624), the bead is located the lateral wall of flexible piece, flexible piece has recess (6231), the fixed block can put into in the recess and with flexible piece fixed connection, the fixed block has the edge through-hole (6241) of the axial setting of casing, the step hole of through-hole for having two kinds of apertures, the needle can pass the through-hole and by the step hole is spacing.
3. The needle valve hot runner system according to claim 2, wherein: the fixed block with flexible piece is clearance fit, and is equipped with the sealing washer between the two, the fixed block with flexible piece is fixed through jump ring (63).
4. The needle valve hot runner system according to claim 2, wherein: one end of the fixing block extends out of the groove and penetrates out of the shell, and the fixing block is sealed with the shell through a sealing ring.
5. The needle valve hot runner system according to claim 1, wherein: one end of the movable block is provided with a convex column (625), and the limiting block is in threaded connection with the convex column.
6. The needle valve hot runner system according to claim 1, wherein: the shell comprises a column shell (613) and two end covers (614) fixedly connected to two ends of the column shell respectively, wherein one end cover is provided with a through hole for the valve needle to penetrate out.
7. The needle valve hot runner system according to claim 1, wherein: the positioning hole is a stepped hole with two different diameters, wherein the part with the smaller diameter is in clearance fit with the valve needle, and the part with the larger diameter is communicated with the branch channel.
8. The needle valve hot runner system according to claim 7, wherein: the discharge end of the hot nozzle assembly is provided with a mounting hole (33), and the valve needle sleeve is fixedly mounted in the mounting hole.
9. The needle valve hot runner system according to claim 8, wherein: the valve needle sleeve comprises a valve needle sleeve body and is characterized in that a gap is formed between the outer side wall of the valve needle sleeve body and the inner side wall of the mounting hole, a flange (43) is arranged at one end, inserted into the mounting hole, of the valve needle sleeve body, the valve needle sleeve body further comprises a locking piece (5), the locking piece is inserted into the gap and is fixedly connected with the hot nozzle assembly, and the locking piece can abut against the flange to fix the valve needle sleeve body.
10. The needle valve hot runner system according to claim 1, wherein: the valve needle cover is copper valve needle cover, the needle is equipped with 3, 3 the needle uses the axis of hot nozzle is central circumference equipartition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263651.XU CN214111308U (en) | 2020-12-29 | 2020-12-29 | Needle valve type hot runner system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263651.XU CN214111308U (en) | 2020-12-29 | 2020-12-29 | Needle valve type hot runner system |
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| Publication Number | Publication Date |
|---|---|
| CN214111308U true CN214111308U (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023263651.XU Active CN214111308U (en) | 2020-12-29 | 2020-12-29 | Needle valve type hot runner system |
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| CN (1) | CN214111308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116811148A (en) * | 2023-08-04 | 2023-09-29 | 厦门捷信达精密科技股份有限公司 | Needle valve adjusting mechanism and injection mold |
-
2020
- 2020-12-29 CN CN202023263651.XU patent/CN214111308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116811148A (en) * | 2023-08-04 | 2023-09-29 | 厦门捷信达精密科技股份有限公司 | Needle valve adjusting mechanism and injection mold |
| CN116811148B (en) * | 2023-08-04 | 2024-04-26 | 厦门捷信达精密科技股份有限公司 | Needle valve adjusting mechanism and injection mold |
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