CN116494478B - Pipe joint injection mold convenient to mold opening - Google Patents

Pipe joint injection mold convenient to mold opening Download PDF

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Publication number
CN116494478B
CN116494478B CN202310780514.2A CN202310780514A CN116494478B CN 116494478 B CN116494478 B CN 116494478B CN 202310780514 A CN202310780514 A CN 202310780514A CN 116494478 B CN116494478 B CN 116494478B
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China
Prior art keywords
mold
core body
sliding
cavity
core
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CN202310780514.2A
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Chinese (zh)
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CN116494478A (en
Inventor
智月松
郭晶鑫
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Taicang Aolinji Auto Parts Co ltd
Taicang Yuesong Mold Manufacturing Co.,Ltd.
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Taicang Aolinji Auto Parts Co ltd
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Priority to CN202310780514.2A priority Critical patent/CN116494478B/en
Publication of CN116494478A publication Critical patent/CN116494478A/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
    • B29C45/26Moulds
    • 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
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/56Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/58Applying the releasing agents
    • 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
    • B29C45/33Moulds having transversely, e.g. radially, movable mould parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/24Pipe joints or couplings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to the field of injection molding, in particular to a pipe joint injection mold convenient for mold opening, which comprises a fixed mold, a movable mold and two mold cores matched with the inside of the fixed mold and the movable mold; the method is characterized in that: the mold core comprises a hydraulic cylinder and a core body; the core body comprises a back seat and a precursor; the driving motor drives the screw rod to rotate, the screw rod rotates to drive the sliding block to move towards the rear end direction of the core body, the sliding block pulls the filling strip to move through the connecting plate, the filling strip moves along the bottom surface direction in the sliding groove, the surface area of the core body is reduced, the contact area between the core body and an injection molding blank can be reduced, the possibility that a certain part on the core body pulls the injection molding blank is further reduced, the core body is convenient to separate from the injection molding blank, the quick die sinking of the pipe joint injection molding blank and the die is realized, and meanwhile, the inner surface regularity of the injection molding blank is guaranteed.

Description

Pipe joint injection mold convenient to mold opening
Technical Field
The invention relates to the field of injection molding, in particular to a pipe joint injection mold convenient for mold opening.
Background
The plastic pipe joint is produced by injection molding, the injection mold generally comprises a movable mold, a fixed mold and a core body matched with a mold cavity of the movable mold, the molten raw material is injected into the mold cavity, the raw material fills a gap between the core body and the mold cavity, after the raw material is cooled by water cooling, the movable mold is withdrawn away from the fixed mold, and then the core body is pulled away from an injection blank, so that an injection molding product is molded;
when the mold core is pulled away from the inside of the injection molding blank, the raw materials are fully attached to the surface of the mold core due to the strong pressure of the initial injection raw materials, the surface of the mold core is tightly matched with the inner surface of the injection molding blank, friction force exists between the mold core and the injection molding blank in the pulling-away process, heat remains in the injection molding blank at the moment, the injection molding blank is elastic, the inner surface of the injection molding blank is pulled and deformed when the surface of the mold core is pulled, the quality of the injection molding blank is influenced, and the deformation part of the inner surface of the injection molding blank possibly hinders the flow efficiency of media in the pipe joint when the injection molding blank is put into use in the later stage.
Therefore, a pipe joint injection mold facilitating mold opening is proposed in view of the above-mentioned problems.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that an injection molding blank is not easy to separate from a mold core in the prior art.
In order to solve the technical problems, the invention provides a pipe joint injection mold convenient for mold opening, which comprises a fixed mold, a movable mold and two mold cores matched with the inside of the fixed mold and the movable mold; the mold core comprises a hydraulic cylinder and a core body; the core body comprises a back seat and a precursor; the outer ring of the precursor is provided with a plurality of sliding grooves which are circumferentially arrayed on the surface of the precursor, filling strips are arranged in the sliding grooves, the filling strips slide along the radial direction of the precursor, a cavity is formed in the middle of the precursor, the cavity penetrates through the rear end face of the core, the rear end face of the core is fixedly connected with a motor, the output end of the motor points to the cavity and is fixedly connected with a screw rod, the screw rod is in transmission connection with a sliding block, the outer surface of the sliding block is rotationally connected with a connecting plate, the end part of the connecting plate penetrates through a through groove formed between the sliding grooves and the cavity, and the end part of the connecting plate is rotationally connected with the inner surface of the filling strips;
the rear end face of the core body is fixedly connected with a connecting cylinder, the connecting cylinder covers the motor, and the end part of the connecting cylinder is fixedly connected with the output end of the hydraulic cylinder; when the pipe joint injection mold is used, the core body is driven by the hydraulic cylinder at the rear end to be pushed into the mold cavity, then molten raw materials are injected between the mold cavity and the core body, after the molten raw materials are cooled by water cooling, the movable mold is retracted and away from the fixed mold, meanwhile, the driving motor drives the screw rod to rotate, the screw rod rotates to drive the sliding block to move towards the rear end direction of the core body, the sliding block pulls the filling strip to move along the inner bottom surface direction of the sliding groove in the sliding groove through the connecting plate, the surface area of the core body is reduced, the contact area between the core body and an injection molding blank can be reduced, the possibility that the injection molding blank is pulled at a certain position on the core body is further reduced, the core body is convenient to separate from the injection molding blank, the quick mold opening of the pipe joint injection molding blank and the mold is realized, and the inner surface regularity of the injection molding blank is ensured; after the injection molding blank is taken down, the core body extends into the mold cavity through the driving of the hydraulic cylinder, meanwhile, the movable mold and the fixed mold are assembled, the motor rotates reversely, the sliding block is driven to move towards the front end direction of the core body, the sliding block pushes the filling strip to move towards the notch direction of the sliding groove through the connecting plate, the outer surface of the filling strip is flush with the notch of the sliding groove, the regularity and smoothness of the surface of the core body are guaranteed, and then molten raw materials are injected into the mold cavity, and according to the operation, the circulation execution is achieved.
In one embodiment of the invention, the outer end face of the filling strip on one mold core is provided with jacks, the outer end face of the filling strip on the other mold core is fixedly connected with inserting rods, the two mold cores extend into the mold cavity of the mold, and the inserting rods are inserted into the jacks one by one; the core passes through the pneumatic cylinder and extends to in the die cavity, and the front end of two cores extrudees together each other, and the inserted bar inserts in the jack simultaneously for two relative filler strips are connected as a whole, when the slider promotes the filler strip to remove, and the filler strip can stabilize the removal, and the tight joint of seal attaches the notch at the spout, further improves the filler strip and the close fit of spout, guarantees the regularity and the smoothness on core surface, thereby the high-quality coupling blank of moulding plastics department.
In one embodiment of the invention, a release agent channel system is arranged inside the sliding block; the release agent channel system comprises an annular channel and a right-angle channel; the cavity is internally provided with a liquid inlet pipe, the liquid inlet pipe penetrates through the rear end face of the core body and is communicated with an external pump body, the end part of the liquid inlet pipe penetrates through a first sliding hole formed in one side of the end face of the sliding block, the first sliding hole is communicated with a right-angle channel, the right-angle channel is communicated with an annular channel, the outer ring of the annular channel is communicated with a plurality of pipe bodies, the pipe bodies penetrate through the sliding block and are communicated to a cavity formed in the filling strip along a through groove, the surface of the filling strip is provided with overflow holes, and the overflow holes are communicated with the cavity; an opening is formed in the liquid inlet pipe at the position in the first sliding hole, and the opening is communicated with the right-angle channel; the liquid inlet pipe is communicated with an external pump body, the pump body injects a release agent into the liquid inlet pipe, when the sliding block moves towards the rear end direction of the core body, the filling strip moves towards the inner bottom surface direction of the chute, meanwhile, the right-angle channel is communicated with the opening on the liquid inlet pipe, the release agent in the liquid inlet pipe is injected into the right-angle channel, then flows into the pipe body along the annular channel, finally flows out along the overflow hole, and meanwhile, the injection molding blank is a time point for blanking, after blanking is finished, the core body extends into the die cavity, the sliding block moves towards the front end direction of the core body, the opening is staggered with the right-angle channel, the sliding block continues to move towards the front end direction of the core body, at the moment, the right-angle channel is blocked by the solid part of the liquid inlet pipe, the opening is blocked by the inner surface of the first slide hole, at the moment, the filling strip moves to the notch position of the chute, and during moving, the filling strip extrudes the overflowed release agent onto the surface of the core body, and the release agent is added, so that the core body and the injection molding blank are smoothly separated from the core body, and the injection molding blank are helped to improve the die opening efficiency; meanwhile, the release agent is supplemented through the movement of the sliding block, the release agent is supplemented timely when needed, and additional equipment is not needed to be added for supplementing the release agent, so that the investment of cost is saved.
In one embodiment of the invention, a second sliding hole is formed on the other side of the end face of the sliding block, and a return pipe is connected in a sliding manner in the second sliding hole; the return pipe penetrates through the second sliding holes on all the sliding blocks from front to back, and the end part of the return pipe extends to the outside of the core body along the cavity; an arc-shaped backflow channel is arranged between the second sliding hole and the first sliding hole, the backflow channel bypasses the transmission connection position of the screw rod and the sliding block, and two ends of the backflow channel are respectively communicated with the first sliding hole and the second sliding hole; a reflux hole is formed in the part, located in the second slide hole, of the reflux pipe, and the reflux hole is communicated with the second slide hole; in the operation of the pump body in a day, the final pump body comprehensive efficiency is possibly influenced by stopping the pump body every time, therefore, the pump body is in a better state of being always opened, the pump body is always in an opened state, and continuously injecting the release agent into the liquid inlet pipe, when the upper opening of the liquid inlet pipe is plugged by the surface of the first slide hole, the pressure of the release agent is in a pressurized state, and the problem of release agent leakage can possibly occur.
In one embodiment of the invention, the overflow holes are arranged on the inclined planes at two sides of the filling strip, and the outlets of the overflow holes are arranged in an elongated way towards the outer surface of the filling strip; the overflow hole is formed in the side wall of the filling strip, the release agent is remained on the side wall of the filling strip when overflowed, when the filling strip moves to the notch of the chute, the notch of the chute extrudes part of the release agent on the surface of the filling strip to the position of the chute, and the release agent overflows on the surface of the core body, so that the release agent can be effectively covered on the surface of the core body.
In one embodiment of the invention, a cooling channel is arranged in the core body, the inlet end of the cooling channel is communicated with a return pipe, and the outlet end of the cooling channel extends out of the core body through a hose; the cooling channel is formed in the solid part inside the core body, the cooling channel is formed in a way of avoiding the sliding groove and the cavity, the inlet of the cooling channel is communicated with the return pipe, when the return pipe flows in the return pipe, the release agent flows in the cooling channel to cool the core body, namely, the release agent is used for demolding the injection molding blank and simultaneously cooling the core body, namely, the release agent is used for cooling the core body in a water cooling manner and simultaneously cooling the core body, so that the cooling efficiency is improved.
In one embodiment of the invention, wedge-shaped extrusion blocks are arranged in the stepped grooves on two sides of the movable die, the rear end of the rear seat is arranged in the stepped groove, and the extrusion blocks are extruded on the rear end surface of the rear seat after the movable die and the fixed die are assembled; in the injection molding process, the pressure of the injected molten raw material is retracted against the core body, so that the core body has a trend of being separated from a mold cavity, even if the hydraulic cylinder is used for pushing the core body against the core body, the core body can be offset, an extrusion block is arranged for the extrusion block, after the core body is placed in the mold cavity, the movable mold and the fixed mold are clamped, and meanwhile the extrusion block on the movable mold is extruded on the rear end face of the core body to fix and limit the core body, so that the stability of the core body in the mold cavity is ensured.
In one embodiment of the invention, the cavity penetrates through the front end face of the core body, the front end face of the core body is in threaded rotation connection with a cover plate, and the inner side of the cover plate is in rotation connection with a screw rod; the front end face of the core body is provided with the cover plate, the middle position of the inner side wall of the cover plate is rotationally connected with the screw rod, the cover plate can be rotationally taken down when the core body is maintained, the observation of the internal condition of the cavity is facilitated, and the installation and maintenance of parts on the core body in the later period are facilitated.
In one embodiment of the invention, the bottoms of two sides of the movable die are provided with supporting blocks, the lower surfaces of the supporting blocks are provided with supporting plates, and the supporting blocks are connected with the supporting plates in a sliding manner; through setting up the backup pad for the support of movable mould improves movable mould and moves stability, when making movable mould and fixed mould compound die, all can close fit, guarantees the quality of the product of moulding plastics.
In one embodiment of the invention, the surfaces of the die cavities of the movable die and the fixed die are provided with a plurality of telescopic holes, the telescopic holes respectively penetrate through the back surfaces of the movable die and the fixed die, the back surfaces of the movable die and the fixed die are provided with a cover body, the cover body is internally provided with a plurality of air cylinders, the output ends of the air cylinders are fixedly connected with push rods, and the push rods are in sealed sliding connection in the telescopic holes; after the injection blank is cooled, when the movable die is separated from the fixed die, the air cylinder at the back of the movable die pushes the push rod to protrude out of the inner surface of the die cavity of the movable die, so that the injection blank is separated from the movable die, the injection blank is still placed in the die cavity of the fixed die at the moment, then the core body is withdrawn, after the core body is separated from the injection blank, the air cylinder at the back of the fixed die is started, and the push rod pushes the injection blank out of the die cavity, so that the blanking of the injection blank is realized.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. according to the invention, the driving motor drives the screw rod to rotate, the screw rod rotates to drive the sliding block to move towards the rear end direction of the core body, the sliding block pulls the filling strip to move through the connecting plate, and the filling strip moves along the direction of the inner bottom surface of the inner groove of the sliding groove, so that the surface area of the core body is reduced, the contact area between the core body and an injection molding blank can be reduced, and the possibility that a certain part of the core body pulls the injection molding blank is further reduced, so that the core body is convenient to separate from the injection molding blank, the quick die opening of the pipe joint injection molding blank and a die is realized, and meanwhile, the inner surface regularity of the injection molding blank is ensured.
2. According to the filling strip disclosed by the invention, the overflowed release agent is extruded to the surface of the core body, and the release agent is added, so that the core body and an injection molding blank can be smoothly separated, and the mold opening efficiency can be improved; meanwhile, the release agent is supplemented through the movement of the sliding block, the release agent is supplemented timely when needed, and additional equipment is not needed to be added for supplementing the release agent, so that the investment of cost is saved.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
FIG. 1 is a perspective view of an injection mold for pipe joints in accordance with the present invention;
FIG. 2 is a state diagram of an injection mold for pipe joints according to the present invention;
FIG. 3 is a perspective view showing the cooperation of the mold core and the movable mold in the present invention;
FIG. 4 is a perspective view of a first view of a core of the present invention;
FIG. 5 is a perspective view of a mold core according to the present invention;
FIG. 6 is a perspective view of a first view of the cooperation of a slider and a screw in the present invention;
FIG. 7 is a block diagram of a system of internal mold release agent channels for a slide in accordance with the present invention;
FIG. 8 is a block diagram of a cooling channel within a slider according to the present invention;
FIG. 9 is a view showing the fit of the expansion holes and the mold cavities in the present invention;
FIG. 10 is a perspective view of a second view of the cooperation of the slider and the screw in the present invention;
fig. 11 is a second perspective view of the core of the present invention.
In the figure: the mold comprises a fixed mold 1, a movable mold 2, a mold core 3, a hydraulic cylinder 4, a core body 5, a rear seat 6, a front body 7, a sliding chute 8, a filling bar 9, a cavity 10, a motor 11, a screw rod 12, a sliding block 13, a joint plate 14, a connecting cylinder 16, an inserting hole 17, an inserting rod 18, a mold cavity 19, an annular channel 20, a right-angle channel 21, a liquid inlet pipe 22, a first sliding hole 23, a pipe body 27, an overflow hole 28, an opening 29, a second sliding hole 30, a return pipe 31, a return channel 32, a return hole 33, an extrusion block 34, a cover plate 35, a supporting block 36, a supporting plate 37 and a telescopic hole 38.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1, 2, 3, 4, 5, 6, 10 and 11, a pipe joint injection mold for facilitating mold opening includes a fixed mold 1, a movable mold 2, and two mold cores 3 cooperating with the inside of the fixed mold 1 and the movable mold 2; the mold core 3 comprises a hydraulic cylinder 4 and a core body 5; the core 5 comprises a back seat 6 and a front body 7; the outer ring of the precursor 7 is provided with a plurality of sliding grooves 8, the sliding grooves 8 are circumferentially arrayed on the surface of the precursor 7, filling strips 9 are arranged in the sliding grooves 8, the filling strips 9 can slide along the radial direction of the precursor 7, a cavity 10 is formed in the middle position of the precursor 7, the cavity 10 penetrates through the rear end face of the core 5, the rear end face of the core 5 is fixedly connected with a motor 11, the output end of the motor 11 points to the cavity 10 and is fixedly connected with a screw rod 12, the screw rod 12 is in transmission connection with a sliding block 13, the outer surface of the sliding block 13 is rotationally connected with a connecting plate 14, the end part of the connecting plate 14 penetrates through a through groove formed between the sliding grooves 8 and the cavity 10, and the end part of the connecting plate 14 is rotationally connected with the inner surface of the filling strips 9;
the rear end face of the core body 5 is fixedly connected with a connecting cylinder 16, the connecting cylinder 16 covers the motor 11, and the end part of the connecting cylinder 16 is fixedly connected with the output end of the hydraulic cylinder 4; when the pipe joint injection mold is used, the core body 5 is driven to be pushed into the mold cavity 19 through the hydraulic cylinder 4 at the rear end, then molten raw materials are injected between the mold cavity 19 and the core body 5, after water cooling, the movable mold 2 is retracted away from the fixed mold 1, meanwhile, the driving motor 11 drives the screw rod 12 to rotate, the screw rod 12 rotates to drive the sliding block 13 to move towards the rear end direction of the core body 5, the sliding block 13 pulls the filling strip 9 to move through the connecting plate 14, the filling strip 9 moves along the inner bottom surface direction of the sliding groove 8 in the sliding groove 8, so that the surface area of the core body 5 is reduced, the contact area between the core body 5 and an injection blank can be reduced, the possibility that a certain part on the core body 5 pulls the injection blank is reduced, the core body 5 is convenient to separate from the injection blank, the quick mold opening of the pipe joint injection blank and the mold is realized, and meanwhile, the internal surface regularity of the injection blank is ensured; after the injection molding blank is taken down, the core body 5 is driven by the hydraulic cylinder 4 to extend into the mold cavity 19, meanwhile, the movable mold 2 and the fixed mold 1 are assembled, the motor 11 rotates reversely to drive the sliding block 13 to move towards the front end direction of the core body 5, the sliding block 13 pushes the filling strip 9 to move towards the notch direction of the chute 8 through the connecting plate 14, the outer surface of the filling strip 9 is flush with the notch of the chute 8, the regularity and smoothness of the surface of the core body 5 are ensured, and then molten raw materials are injected into the mold cavity 19, and the operation is performed circularly according to the operation.
Referring to fig. 3, 4, 5 and 6, the outer end face of the filling strip 9 on one mold core 3 is provided with a jack 17, the outer end face of the filling strip 9 on the other mold core 3 is fixedly connected with an inserting rod 18, the two mold cores 3 extend into a mold cavity 19, and the inserting rods 18 are inserted into the jacks 17 one by one; the core body 5 extends to the die cavity 19 through the pneumatic cylinder 4, and the front ends of two core bodies 5 extrude each other together, and simultaneously insert the pole 18 and insert in the jack 17 for two relative filler strips 9 are connected as a whole, when slider 13 promotes filler strip 9 to remove, and filler strip 9 can stably remove, and the tight joint is attached at the notch of spout 8, further improves the close fit of filler strip 9 and spout 8, guarantees the regularity and the smoothness on core body 5 surface, thereby the high-quality coupling blank of moulding plastics of department.
Referring to fig. 6, 7 and 8, a release agent channel system is formed inside the slide block 13; the mold release channel system comprises an annular channel 20 and a right angle channel 21; the cavity 10 is internally provided with a liquid inlet pipe 22, the liquid inlet pipe 22 penetrates through the rear end face of the core body 5 and is communicated with an external pump body, the end part of the liquid inlet pipe 22 penetrates through a first sliding hole 23 formed in one side of the end face of the sliding block 13, the first sliding hole 23 is communicated with a right-angle channel 21, the right-angle channel 21 is communicated with an annular channel 20, the outer ring of the annular channel 20 is communicated with a plurality of pipe bodies 27, the pipe bodies 27 penetrate through the sliding block 13 and are communicated to a cavity formed in the filling strip 9 along a through groove, the surface of the filling strip 9 is provided with an overflow hole 28, and the overflow hole 28 is communicated with the cavity; an opening 29 is formed in the liquid inlet pipe 22 at a position located in the first sliding hole 23, and the opening 29 is communicated with the right-angle channel 21; the liquid inlet pipe 22 is communicated with an external pump body, the pump body injects a release agent into the liquid inlet pipe 22, when the sliding block 13 moves towards the rear end direction of the core body 5, the filling bar 9 moves towards the inner bottom surface direction of the sliding groove 8, meanwhile, the right-angle channel 21 is communicated with an opening 29 on the liquid inlet pipe 22, the motor 11 is in a stop state, the sliding block 13 and the liquid inlet pipe 22 are in a relatively static state, the release agent in the liquid inlet pipe 22 is injected into the right-angle channel 21, then flows into the pipe body 27 along the annular channel 20, finally flows out along the overflow hole 28, and is the time point of injection molding blank blanking, after blanking is finished, the core body 5 extends into the mold cavity 19, meanwhile, the motor 11 is started, the sliding block 13 is driven to move towards the front end direction of the core body 5, the opening 29 is staggered with the right-angle channel 21, the sliding block 13 continues to move towards the front end direction of the core body 5, at the moment, the right-angle channel 21 is blocked by the solid part of the liquid inlet pipe 22, the opening 29 is also blocked by the inner surface of the first sliding hole 23, at the moment, the filling bar 9 is moved to the notch position of the sliding groove 8, then, and in the moving process, the release agent flows out along the overflow hole 28, and the injection molding blank is extruded by the surface of the core body 5, and the injection molding blank is beneficial to improving the extrusion efficiency; meanwhile, the release agent is supplemented through the movement of the sliding block 13, and is timely supplemented when needed, and additional equipment is not needed to be added for supplementing the release agent, so that the investment of cost is saved.
Referring to fig. 6, 7 and 8, a second sliding hole 30 is formed on the other side of the end surface of the sliding block 13, and a return pipe 31 is slidably connected in the second sliding hole 30; the return pipe 31 penetrates through the second slide holes 30 on all the slide blocks 13 back and forth, and the end part of the return pipe 31 extends to the outside of the core body 5 along the cavity 10; an arc-shaped backflow channel 32 is arranged between the second slide hole 30 and the first slide hole 23, the backflow channel 32 bypasses the transmission connection position of the screw rod 12 and the sliding block 13, and two ends of the backflow channel 32 are respectively communicated with the first slide hole 23 and the second slide hole 30; a return hole 33 is formed in the return pipe 31 at a position located in the second sliding hole 30, and the return hole 33 is communicated with the second sliding hole 30; in operation of the pump body in one day, each time the pump body is stopped, the final pump body comprehensive efficiency is possibly influenced, therefore, the pump body is in a state of being always opened, the pump body is always in an opened state, the continuously injected release agent is injected into the liquid inlet pipe 22, when the upper opening 29 of the liquid inlet pipe 22 is plugged by the surface of the first slide hole 23, the pressure of the release agent is in a pressurized state, the problem of release agent leakage possibly occurs, a return pipe 31 is arranged, after the blanking is finished, the core body 5 extends into the die cavity 19, the slide block 13 moves towards the front end direction of the core body 5, the opening 29 is staggered with the right-angle channel 21, the slide block 13 continues to move towards the front end direction of the core body 5, at the moment, the right-angle channel 21 is blocked by the solid part of the liquid inlet pipe 22, the opening 29 at the moment is communicated with the return channel 32, the subsequently injected release agent flows along the return channel 32, at the moment, the return hole 33 on the return pipe 31 is opposite to the outlet of the return channel 32 and is communicated, the release agent flows out along the return pipe 31, the release agent leakage is prevented, and meanwhile, the pump body work efficiency is guaranteed.
Referring to fig. 4, the overflow holes 28 are formed on the inclined surfaces at two sides of the filling strip 9, and the outlets of the overflow holes 28 are elongated towards the outer surface of the filling strip 9; the overflow hole 28 is formed in the side wall of the filling strip 9, the release agent remains on the side wall of the filling strip 9 when overflows, and when the filling strip 9 moves towards the notch of the chute 8, the notch of the chute 8 extrudes part of the release agent on the surface of the filling strip 9 to the position of the chute 8, and the release agent overflows on the surface of the core body 5, so that the release agent can be effectively covered on the surface of the core body 5.
Referring to fig. 6, 7 and 8, a cooling channel is formed in the core 5, an inlet end of the cooling channel is communicated with the return pipe 31, and an outlet end of the cooling channel extends out of the core 5 through a hose; the cooling channel is formed in the solid part inside the core body 5, the sliding groove 8 and the cavity 10 are avoided, the inlet of the cooling channel is communicated with the return pipe 31, when the return pipe 31 flows in the return pipe for the return release agent, the release agent flows in the cooling channel to cool the core body 5, namely, the release agent is used for demolding an injection molding blank and simultaneously cooling the core body 5, namely, the release agent is used for cooling the core body 5 in a water cooling mode inside the core body 5 and simultaneously cooling the core body 5, so that the cooling efficiency is improved.
Referring to fig. 1 and 3, wedge-shaped extrusion blocks 34 are arranged in the step grooves on two sides of the movable die 2, the rear end of the rear seat 6 is arranged in the step groove, and after the movable die 2 and the fixed die 1 are matched, the extrusion blocks 34 are extruded on the rear end surface of the rear seat 6; in the injection molding process, the pressure of the injected molten raw material is retracted against the core 5, so that the core 5 has a tendency of being separated from the mold cavity 19, even if the hydraulic cylinder 4 is used for pushing and extruding the core 5, the core 5 can be offset, and therefore, the extrusion block 34 is arranged, after the core 5 is placed in the mold cavity 19, the movable mold 2 and the fixed mold 1 are assembled, and meanwhile, the extrusion block 34 on the movable mold 2 is extruded on the rear end surface of the core 5, so that the core 5 is fixedly limited, and the stability of the core 5 in the mold cavity 19 is ensured.
Referring to fig. 4 and 5, the cavity 10 penetrates through the front end surface of the core body 5, the front end surface of the core body 5 is in threaded rotation connection with a cover plate 35, and the inner side of the cover plate 35 is in rotation connection with a screw rod 12; the front end face of the core body 5 is provided with the cover plate 35, the middle position of the inner side wall of the cover plate 35 is rotationally connected with the screw rod 12, the cover plate 35 can be rotationally taken down when the core body 5 is maintained, the observation of the internal condition of the cavity 10 is facilitated, and the installation and maintenance of parts on the core body 5 in the later period are facilitated.
Referring to fig. 1 and 3, the bottoms of both sides of the movable die 2 are provided with supporting blocks 36, the lower surface of each supporting block 36 is provided with a supporting plate 37, and the supporting blocks 36 are connected with the supporting plates 37 in a sliding manner; by arranging the supporting plate 37 for supporting the movable die 2, the moving stability of the movable die 2 is improved, and the movable die 2 and the fixed die 1 can be tightly matched when being matched, so that the quality of injection molding products is ensured.
Example two
Referring to fig. 9, a comparative example one, as another embodiment of the present invention, in which a plurality of expansion holes 38 are formed on the surfaces of the mold cavities 19 of the movable mold 2 and the fixed mold 1, the expansion holes 38 are respectively penetrated to the back surfaces of the movable mold 2 and the fixed mold 1, the back surfaces of the movable mold 2 and the fixed mold 1 are provided with a cover body, a plurality of cylinders are provided in the cover body, the output ends of the cylinders are fixedly connected with push rods, and the push rods are hermetically and slidably connected in the expansion holes 38; after the injection blank is cooled, when the movable die 2 is separated from the fixed die 1, the air cylinder at the back of the movable die 2 pushes the push rod to protrude out of the inner surface of the die cavity 19 of the movable die 2, so that the injection blank is separated from the movable die 2, at the moment, the injection blank is still placed in the die cavity 19 of the fixed die 1, then the core body 5 is retracted, after the core body 5 is separated from the injection blank, the air cylinder at the back of the fixed die 1 is started, and the push rod pushes the injection blank out of the die cavity 19, so that the blanking of the injection blank is realized.
Working principle: when the pipe joint injection mold is used, the core body 5 is driven to be pushed into the mold cavity 19 through the hydraulic cylinder 4 at the rear end, then molten raw materials are injected between the mold cavity 19 and the core body 5, after being cooled through water cooling, the movable mold 2 is retracted away from the fixed mold 1, meanwhile, the driving motor 11 drives the screw rod 12 to rotate, the screw rod 12 rotates to drive the sliding block 13 to move towards the rear end direction of the core body 5, the sliding block 13 pulls the filling strip 9 to move through the connecting plate 14, the filling strip 9 moves along the inner bottom surface direction of the sliding groove 8 in the sliding groove 8, so that the surface area of the core body 5 is reduced, the contact area between the core body 5 and an injection blank can be reduced, the possibility that a certain part on the core body 5 pulls the injection blank is reduced, the core body 5 is convenient to separate from the injection blank, the quick mold opening of the pipe joint injection blank and the mold is realized, and meanwhile, the internal surface regularity of the injection blank is ensured; after the injection molding blank is taken down, the core body 5 is driven by the hydraulic cylinder 4 to extend into the mold cavity 19, meanwhile, the movable mold 2 and the fixed mold 1 are clamped, the motor 11 rotates reversely to drive the sliding block 13 to move towards the front end direction of the core body 5, the sliding block 13 pushes the filling strip 9 to move towards the notch direction of the chute 8 through the connecting plate 14, the outer surface of the filling strip 9 is flush with the notch of the chute 8, the regularity and smoothness of the surface of the core body 5 are ensured, and then molten raw materials are injected into the mold cavity 19, and the operation is performed circularly according to the operation;
the core bodies 5 extend into the die cavity 19 through the hydraulic cylinders 4, the front ends of the two core bodies 5 are mutually extruded, meanwhile, the inserting rods 18 are inserted into the inserting holes 17, so that the two opposite filling strips 9 are connected into a whole, when the sliding blocks 13 push the filling strips 9 to move, the filling strips 9 can stably move, and the tight seams are attached to the notches of the sliding grooves 8, so that the tight fit between the filling strips 9 and the sliding grooves 8 is further improved, the surface regularity and smoothness of the core bodies 5 are ensured, and the high-quality pipe joint injection molding blank at the injection molding position is further ensured;
the liquid inlet pipe 22 is communicated with an external pump body, the pump body injects release agent into the liquid inlet pipe 22, when the sliding block 13 moves towards the rear end direction of the core 5, the filling strip 9 moves towards the inner bottom surface direction of the chute 8, meanwhile, the right-angle channel is communicated with the opening 29 on the liquid inlet pipe 22, release agent in the liquid inlet pipe 22 is injected into the right-angle channel 21, then flows into the pipe body 27 along the annular channel 20, finally flows out along the overflow hole 28, and is a time point of blanking an injection molding blank, after blanking is finished, the core 5 extends into the die cavity 19, the sliding block 13 moves towards the front end direction of the core 5, the opening 29 is staggered with the right-angle channel 21, the sliding block 13 continues to move towards the front end direction of the core 5, at the moment, the right-angle channel 21 is blocked by the solid part of the liquid inlet pipe 22, the opening 29 is blocked by the inner surface of the first slide hole 23, at the moment, the filling strip 9 moves to the notch position of the chute 8, the overflow release agent is extruded onto the surface of the core 5 by the filling strip 9 in the moving process, the release agent is added, the release agent is beneficial to the core 5 and the injection molding blank is smoothly separated from the injection molding blank, and the die is smoothly opened; meanwhile, the release agent is supplemented through the movement of the sliding block 13, and is timely supplemented when needed, and additional equipment is not needed to be added for supplementing the release agent, so that the investment of cost is saved;
in the operation of the pump body in one day, each time the pump body is stopped, the final pump body comprehensive efficiency is possibly influenced, therefore, the pump body is in a state of being always opened, the pump body is always in an opened state, the continuously injected release agent is injected into the liquid inlet pipe 22, when the upper opening 29 of the liquid inlet pipe 22 is plugged by the surface of the first slide hole 23, the pressure of the release agent is in a pressurized state, the problem of release agent leakage possibly occurs, a return pipe 31 is arranged, after the blanking is finished, the core body 5 extends into the die cavity 19, the slide block 13 moves towards the front end direction of the core body 5, the opening 29 is staggered with the right-angle channel 21, the slide block 13 continues to move towards the front end direction of the core body 5, at the moment, the right-angle channel 21 is blocked by the solid part of the liquid inlet pipe 22, the opening 29 at the moment is communicated with the return channel 32, the subsequently injected release agent flows along the return channel 32, at the moment, the return hole 33 on the return pipe 31 is opposite to the outlet of the return channel 32 and is communicated, the release agent flows out along the return pipe 31, the release agent leakage is prevented, and meanwhile, the working efficiency of the pump body can be always ensured;
the overflow holes 28 are formed in the side wall of the filling strip 9, the release agent remains on the side wall of the filling strip 9 when overflows, and when the filling strip 9 moves towards the notch of the chute 8, the notch of the chute 8 extrudes part of the release agent on the surface of the filling strip 9 to the position of the chute 8, and the release agent overflows on the surface of the core body 5, so that the release agent can be effectively covered on the surface of the core body 5; a cooling channel is formed in the solid part inside the core body 5 and is avoided from being formed in the sliding groove 8 and the cavity 10, an inlet of the cooling channel is communicated with the return pipe 31, when the return pipe 31 flows in the return pipe, the return pipe flows in the cooling channel to cool the core body 5, namely, the mold release agent is used for demolding an injection molding blank and simultaneously cooling the core body 5, namely, the mold release agent is used for cooling the core body 5 in a water cooling mode and simultaneously cooling the core body 5, so that the cooling efficiency is improved;
in the injection molding process, the pressure of the injected molten raw material is retracted against the core body 5, so that the core body 5 has a tendency of being separated from the mold cavity 19, even if the hydraulic cylinder 4 is used for propping and extruding the core body 5, the core body 5 can be offset, therefore, the extrusion block 34 is arranged, after the core body 5 is placed in the mold cavity 19, the movable mold 2 and the fixed mold 1 are assembled, and meanwhile, the extrusion block 34 on the movable mold 2 is extruded on the rear end surface of the core body 5 to fixedly limit the core body 5, so that the stability of the core body 5 in the mold cavity 19 is ensured; the cover plate 35 is arranged on the front end face of the core body 5, the middle position of the inner side wall of the cover plate 35 is rotationally connected with the screw rod 12, when the core body 5 is maintained, the cover plate 35 can be rotationally taken down, so that the internal condition of the cavity 10 can be conveniently observed, and the installation and maintenance of parts on the core body 5 in the later period can be conveniently realized; by arranging the supporting plate 37 for supporting the movable die 2, the moving stability of the movable die 2 is improved, and the movable die 2 and the fixed die 1 can be tightly matched when being matched, so that the quality of injection molding products is ensured.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. The pipe joint injection mold convenient for mold opening comprises a fixed mold (1), a movable mold (2) and two mold cores (3) matched with the inside of the fixed mold (1) and the movable mold (2); the method is characterized in that: the mold core (3) comprises a hydraulic cylinder (4) and a core body (5); the core body (5) comprises a rear seat (6) and a precursor (7); the novel plastic filling machine is characterized in that a plurality of sliding grooves (8) are formed in the outer ring of the precursor (7), the sliding grooves (8) are formed in the surface of the precursor (7) in a circumferential array, filling strips (9) are arranged in the sliding grooves (8), the filling strips (9) can slide along the radial direction of the precursor (7), a cavity (10) is formed in the middle position of the precursor (7), the cavity (10) penetrates through the rear end face of the core (5), a motor (11) is fixedly connected to the rear end face of the core (5), the output end of the motor (11) points to the cavity (10) and is fixedly connected with a screw rod (12), a sliding block (13) is connected to the upper transmission of the screw rod (12), a connecting plate (14) is rotationally connected to the outer surface of the sliding block (13), the end part of the connecting plate (14) penetrates through a through groove formed between the sliding grooves (8) and the cavity (10), and the end part of the connecting plate (14) is rotationally connected to the inner surface of the filling strips (9).
The rear end face of the core body (5) is fixedly connected with a connecting cylinder (16), the connecting cylinder (16) covers the motor (11), and the end part of the connecting cylinder (16) is fixedly connected with the output end of the hydraulic cylinder (4).
2. The injection mold for pipe joints convenient to open according to claim 1, wherein: the outer end faces of the filling strips (9) on one mold core (3) are provided with inserting holes (17), the outer end faces of the filling strips (9) on the other mold core (3) are fixedly connected with inserting rods (18), the two mold cores (3) extend into the mold cavity (19), and the inserting rods (18) are inserted into the inserting holes (17) one by one.
3. The injection mold for pipe joints convenient to open according to claim 1, wherein: a release agent channel system is arranged in the sliding block (13); the release agent channel system comprises an annular channel (20) and a right-angle channel (21); the cavity (10) is internally provided with a liquid inlet pipe (22), the liquid inlet pipe (22) penetrates through the rear end face of the core body (5) and is communicated with an external pump body, the end part of the liquid inlet pipe (22) penetrates through a first sliding hole (23) formed in one side of the end face of the sliding block (13), the first sliding hole (23) is communicated with a right-angle channel (21), the right-angle channel (21) is communicated with an annular channel (20), the outer ring of the annular channel (20) is communicated with a plurality of pipe bodies (27), the pipe bodies (27) penetrate through the sliding block (13) and are communicated to a cavity formed in the filling strip (9) along a through groove, the surface of the filling strip (9) is provided with an overflow hole (28), and the overflow hole (28) is communicated with the cavity; an opening (29) is formed in the position, located in the first sliding hole (23), of the liquid inlet pipe (22), and the opening (29) is communicated with the right-angle channel (21).
4. A pipe joint injection mold facilitating mold opening according to claim 3, wherein: a second sliding hole (30) is formed in the other side of the end face of the sliding block (13), and a return pipe (31) is connected in the second sliding hole (30) in a sliding manner; the return pipe (31) penetrates through the second slide holes (30) on all the sliding blocks (13) front and back, and the end part of the return pipe (31) extends to the outside of the core body (5) along the cavity (10); an arc-shaped backflow channel (32) is formed between the second sliding hole (30) and the first sliding hole (23), the backflow channel (32) bypasses the transmission connection position of the screw rod (12) and the sliding block (13), and two ends of the backflow channel (32) are respectively communicated with the first sliding hole (23) and the second sliding hole (30); and a reflux hole (33) is formed in the part, located in the second slide hole (30), of the reflux pipe (31), and the reflux hole (33) is communicated with the second slide hole (30).
5. A pipe joint injection mold facilitating mold opening according to claim 3, wherein: the overflow holes (28) are formed in inclined planes on two sides of the filling strip (9), and the outlets of the overflow holes (28) are arranged in an elongated manner towards the outer surface of the filling strip (9).
6. The injection mold for pipe joints convenient to open according to claim 1, wherein: the cooling channel is arranged in the core body (5), the inlet end of the cooling channel is communicated with the return pipe (31), and the outlet end of the cooling channel extends to the outside of the core body (5) through the hose.
7. The injection mold for pipe joints convenient to open according to claim 1, wherein: wedge-shaped extrusion blocks (34) are arranged in the stepped grooves on two sides of the movable die (2), the rear end of the rear seat (6) is arranged in the stepped grooves, and after the movable die (2) and the fixed die (1) are clamped, the extrusion blocks (34) are extruded on the rear end face of the rear seat (6).
8. The injection mold for pipe joints convenient to open according to claim 1, wherein: the cavity (10) penetrates through the front end face of the core body (5), the front end face of the core body (5) is in threaded rotation connection with the cover plate (35), and the inner side of the cover plate (35) is in rotation connection with the screw rod (12).
9. The injection mold for pipe joints convenient to open according to claim 1, wherein: the bottom of both sides of movable mould (2) is equipped with supporting shoe (36), and supporting shoe (36) lower surface is equipped with backup pad (37), and supporting shoe (36) sliding connection backup pad (37).
10. The injection mold for pipe joints convenient to open according to claim 9, wherein: the surface of a die cavity (19) of the movable die (2) and the fixed die (1) is provided with a plurality of telescopic holes (38), the telescopic holes (38) respectively penetrate through the back surfaces of the movable die (2) and the fixed die (1), the back surfaces of the movable die (2) and the fixed die (1) are provided with a cover body, a plurality of air cylinders are arranged in the cover body, the output ends of the air cylinders are fixedly connected with push rods, and the push rods are hermetically and slidably connected in the telescopic holes (38).
CN202310780514.2A 2023-06-29 2023-06-29 Pipe joint injection mold convenient to mold opening Active CN116494478B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136146A (en) * 1976-11-03 1979-01-23 Owens-Illinois, Inc. Method for forming tubular plastic articles
CN101428471A (en) * 2008-12-08 2009-05-13 广东达诚机械有限公司 Thermal forming mould
CN103112153A (en) * 2013-03-12 2013-05-22 广东达诚机械有限公司 Thermal forming die
CN206230866U (en) * 2016-11-30 2017-06-09 上海卡豹汽车科技有限公司 A kind of Multicarity smart blister device
CN108247962A (en) * 2018-02-06 2018-07-06 宁波双林模具有限公司 A kind of injection mold hales core-pulling demolding device
CN116021719A (en) * 2023-03-29 2023-04-28 苏州洁力医疗科技有限公司 Forming equipment for disposable plastic flushing drainage tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136146A (en) * 1976-11-03 1979-01-23 Owens-Illinois, Inc. Method for forming tubular plastic articles
CN101428471A (en) * 2008-12-08 2009-05-13 广东达诚机械有限公司 Thermal forming mould
CN103112153A (en) * 2013-03-12 2013-05-22 广东达诚机械有限公司 Thermal forming die
CN206230866U (en) * 2016-11-30 2017-06-09 上海卡豹汽车科技有限公司 A kind of Multicarity smart blister device
CN108247962A (en) * 2018-02-06 2018-07-06 宁波双林模具有限公司 A kind of injection mold hales core-pulling demolding device
CN116021719A (en) * 2023-03-29 2023-04-28 苏州洁力医疗科技有限公司 Forming equipment for disposable plastic flushing drainage tube

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