CN117067529A - Plastic forming die convenient for ejection of product - Google Patents

Abstract

The invention belongs to the technical field of injection molding equipment, and particularly relates to a plastic molding die convenient for product ejection, which comprises a working box, a fixed die, a movable die, hollow slide bars, a water-through inner tube, a water-through assembly and the like, wherein the fixed die and the movable die are arranged in the working box, the hollow slide bars are connected with the fixed die and the movable die in a sliding manner, the hollow slide bars are circumferentially distributed, and the water-through inner tube for introducing cooling water through the water-through assembly is arranged in the hollow slide bars. According to the invention, cooling water is introduced into the inner water pipe for cooling, the first water ring, the second water ring and the hollow slide rod are driven to move to the right when the movable mould is opened, the fan-shaped push block is unfolded, and the annular push block extends out, so that a molded product is ejected, the contact area between the fan-shaped push block and the annular push block and the molded product is small, the contact position between the fan-shaped push block and the molded product can be changed when the fan-shaped push block is unfolded, the annular push block can further eject the molded product, adhesion of the molded product is avoided, and the demolding efficiency is higher.

Description

Plastic forming die convenient for ejection of product

Technical Field

The invention belongs to the technical field of injection molding equipment, and particularly relates to a plastic molding die convenient for product ejection.

Background

The common methods for plastic molding include injection molding, calendaring, blow molding, etc., wherein injection molding is a plastic processing method in which plastic is plasticized in a heating cylinder of an injection molding machine and then injected into a cavity of a closed mold to form a product, and the plastic processing method comprises the processes of mold closing, glue injection, pressure maintaining, cooling, mold opening and product taking out, and the product is generally taken out by a manual or mechanical arm, and the two methods have the limitations of low efficiency and high cost respectively.

The patent publication No. CN216267216U discloses an injection molding machine convenient to get material, including the injection molding machine body, be provided with demoulding mechanism on the injection molding machine body, be provided with purifying mechanism on the injection molding machine body, be provided with buffer gear on the injection molding machine body.

When the upper die is separated from the inside of the lower die bin, the contact plate ejects the molded product in the lower die bin through the action of the telescopic spring, but the contact area of the contact plate and the molded product is larger, the contact surface temperature of the contact plate and the molded product is higher, and when the molded product is ejected, the contact position of the contact plate and the molded product is not changed, the condition that the molded product is stuck on the contact plate possibly occurs, and the need of manually assisting in demolding or the cooling time of the molded product is increased.

Therefore, there is a need to develop a plastic molding die which is convenient for ejecting a product, can reduce the contact area when ejecting the molded product, can cool the contact surface, can change the contact position with the molded product, avoid the molded product from sticking, and does not need to manually assist in demolding in addition, thereby solving the problems.

Disclosure of Invention

The invention provides a plastic forming die convenient for product ejection, which solves the problems in the prior art.

The technical implementation scheme of the invention is as follows: the utility model provides a plastic forming die convenient to product is ejecting, including the injection molding machine, the work box, cover half and movable mould, the injection molding machine is installed in work box one side, but the inside cover half that is equipped with of work box and left and right sides gliding movable mould, still including hollow slide bar, the inner tube that leads to, the connecting block, fan-shaped ejector pad, reset spring one, annular ejector pad, reset spring two, ejecting subassembly and water subassembly, equal sliding connection has many hollow slide bars that are circumference and distribute on cover half and the movable mould, hollow slide bar is inside all to be equipped with the inner tube that leads to through water subassembly and lets in the cooling water, the one end that hollow slide bar is close to the die cavity all is connected with the connecting block with the inner tube intercommunication that leads to, equal sliding connection has a plurality of fan-shaped ejector pads that reset through reset spring one side that the connecting block is close to the die cavity, the annular ejector pad that resets through reset spring two, make hollow slide bar slip through ejecting subassembly when the movable mould is opened, so that fan-shaped ejector pad and annular ejector pad ejecting the molded product.

More preferably, one side of the fixed die and the movable die, which is close to the cavity, is provided with a plurality of circular truncated cone grooves matched with the fan-shaped push blocks, the circular truncated cone grooves are gradually enlarged towards the direction, which is close to the cavity, of the circular truncated cone, the fan-shaped push blocks are abutted with the fixed die or the movable die under the action of the circular truncated cone grooves, and the fan-shaped push blocks are unfolded through the reset spring I after the movable die is opened.

More preferably, the sector pushing blocks are provided with first inclined blocks, one sides of the annular pushing blocks, which are far away from the cavity, are provided with second inclined blocks at equal intervals in the circumferential direction, and the inclined surfaces of the first inclined blocks are contacted with the inclined surfaces of the adjacent second inclined blocks so as to push out the annular pushing blocks when the sector pushing blocks are unfolded.

More preferably, the water passing component comprises a total water inlet pipe, a water passing hose, a first water passing ring and a second water passing ring, wherein the upper side inside the working box is connected with the total water inlet pipe with the left end extending out, the left ends of the left hollow slide bars are connected with the first water passing ring communicated with the left water passing inner pipe together, the right ends of the right hollow slide bars are connected with the second water passing ring communicated with the right water passing inner pipe together, and the first water passing ring, the second water passing ring and the total water inlet pipe are all communicated with the water passing hose.

More preferably, the ejection assembly comprises a movable frame, a return spring, compression springs and a fixed frame, wherein the movable frame connected with the movable mould is connected to the upper side of the inside of the working box in a sliding manner, the movable frame is reset through the return spring, a plurality of compression springs are connected between the second water ring and the movable mould, the fixed frame is fixedly connected to the right side of the inside of the working box, and the second water ring is contacted with the fixed frame in the mould opening process.

More preferably, the hydraulic press further comprises a hydraulic cylinder, wherein the right side inside the working box is fixedly connected with two hydraulic cylinders, and movable rods of the hydraulic cylinders are fixedly connected with the right side of the movable die.

More preferably, a liquid-passing cavity is formed between the outer part of the inner water-passing pipe and the inner part of the adjacent hollow slide rod, and the liquid-passing cavity is not communicated with the inner part of the inner water-passing pipe.

More preferably, the automatic feeding device further comprises a liquid storage tank, a water pump, a liquid passing hose and a spray head, wherein one side of the working tank is connected with the liquid storage tank provided with a liquid inlet, the water pump is arranged in the liquid storage tank, a water outlet of the water pump is communicated with the hollow slide rod through the liquid passing hose, and a plurality of spray heads communicated with the liquid passing accommodating cavity are arranged on the outer side, close to one end of the cavity, of the hollow slide rod.

More preferably, the injection molding machine comprises an injection head, a heating conveyor and a feed hopper, wherein the heating conveyor with the feed hopper is arranged on one side of the working box, and the injection head for injecting plasticized plastic into the cavity is arranged between the heating conveyor and the fixed die.

More preferably, the working box is provided with a radiating hole and a radiating fan, and the bottom of the working box is provided with a guide plate which is obliquely arranged and made of soft materials.

Compared with the prior art, the invention has the following advantages: 1. according to the invention, cooling water is introduced into the inner water pipe for cooling, the first water ring, the second water ring and the hollow slide rod are driven to move to the right when the movable mould is opened, the fan-shaped push block is unfolded, and the annular push block extends out, so that a molded product is ejected, the contact area between the fan-shaped push block and the annular push block and the molded product is small, the contact position between the fan-shaped push block and the molded product can be changed when the fan-shaped push block is unfolded, the annular push block can further eject the molded product, adhesion of the molded product is avoided, and the demolding efficiency is higher.

2. When the movable mould moves to the right to open the mould, the spray head leaves the circular table groove, and the water pump is controlled to spray the release agent from the spray head to the surface of the formed product, so that the formed product can be assisted to be released, and the adhesion of the formed product is further avoided.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a plastic molding mold for facilitating ejection of a product according to the present invention.

Fig. 2 is a schematic view showing the structure of the injection molding machine, the working box, the fixed mold and the movable mold of fig. 1 according to the present invention, which are cut away.

Fig. 3 is a front view of the working chamber, the fixed mold and the movable mold of the present invention, cut away.

Fig. 4 is a schematic structural view of the water passing assembly, the fixed mold and the movable mold of the present invention.

FIG. 5 is a schematic view of the structure of the fixed mold, the movable mold and the hollow slide bar of the present invention.

Fig. 6 is an enlarged view of the invention at a in fig. 5.

FIG. 7 is a schematic cross-sectional view of the connection block, sector push block and annular push block of the present invention.

Fig. 8 is an exploded view of the first connecting block, segment push block and return spring of the present invention.

Fig. 9 is a schematic structural view of the annular push block of the present invention.

Fig. 10 is a schematic view of the structure of the moving frame, return spring, compression spring and fixed frame of the present invention.

Fig. 11 is a schematic view of the structure of the liquid storage tank, the water pump and the liquid passing hose of the present invention.

The marks of the components in the drawings are as follows: 1. the injection molding machine comprises an injection molding machine body, 2, a working box, 3, a fixed mold, 31, a circular table groove, 32, a molded product, 4, a movable mold, 5, a hollow slide rod, 6, a water through inner pipe, 7, a connecting block, 8, a fan-shaped push block, 81, a first reset spring, 82, a first inclined block, 9, an annular push block, 91, a second reset spring, 92, a second inclined block, 101, an injection head, 102, a heating conveyor, 103, a feeding hopper, 111, a total water inlet pipe, 112, a water through hose, 113, a first water through ring, 114, a second water through ring, 121, a movable frame, 122, a return spring, 123, a compression spring, 124, a fixed frame, 13, a hydraulic cylinder, 141, a liquid storage tank, 142, a water pump, 143, a liquid through hose, 144 and a nozzle.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1: 1-10, comprising an injection molding machine 1, a working box 2, a fixed die 3, a movable die 4, a hollow sliding rod 5, a water through inner tube 6, a connecting block 7, a fan-shaped pushing block 8, a first reset spring 81, an annular pushing block 9, a second reset spring 91, a water through component and an ejection component, wherein the top of the working box 2 is provided with a radiating hole, the front and the rear sides of the working box 2 are provided with radiating fans, the heat radiation is accelerated through the radiating holes and the radiating fans, the bottom of the working box 2 is provided with a material guide plate which is obliquely arranged, the material guide plate is made of soft materials so as to avoid damage after the molded product 32 is demolded and falls, the injection molding machine 1 is arranged on the left side of the working box 2, the fixed die 3 is bolted inside the working box 2, the movable die 4 is connected inside the working box 2 in a sliding manner, the injection molding machine 1 comprises an injection head 101, a heating conveyor 102 and a feed hopper 103, the heating conveyor 102 is arranged on the left part of the working box 2, the top of the heating conveyor 102 is provided with a feed hopper 103, an injection head 101 for injecting plasticized plastic into a cavity is arranged between the heating conveyor 102 and the left side of the fixed die 3, four hollow slide bars 5 which are circumferentially distributed are connected to the fixed die 3 and the movable die 4 in a sliding manner, a water through inner pipe 6 is arranged in the hollow slide bars 5, a water through assembly is arranged on the working box 2 and is used for introducing cooling water into the water through inner pipe 6, one end of the hollow slide bar 5, which is close to the cavity, is fixedly connected with a connecting block 7 which is communicated with the water through inner pipe 6, four fan-shaped push blocks 8 are connected to the connecting block 7 in a sliding manner, a reset spring 81 is fixedly connected between each fan-shaped push block 8 and the adjacent connecting block 7, four round table grooves 31 which are matched with the fan-shaped push blocks 8 are formed in one sides of the fixed die 3 and the movable die 4, and the round table grooves 31 are gradually expanded towards the direction which is close to the cavity, under the effect of round platform groove 31, fan-shaped ejector pad 8 and cover half 3 or movable mould 4 butt, after the movable mould 4 is opened, fan-shaped ejector pad 8 leaves round platform groove 31, fan-shaped ejector pad 8 is expanded through reset spring one 81, thereby change fan-shaped ejector pad 8 and the contact position of shaping product 32, the equal sliding connection of one side that connecting block 7 is close to the die cavity has annular ejector pad 9, all be connected with a plurality of reset spring two 91 between annular ejector pad 9 and the adjacent connecting block 7, all be equipped with sloping block one 82 on the fan-shaped ejector pad 8, the equal circumference interval in one side that annular ejector pad 9 is kept away from the die cavity is equipped with four sloping block two 92, the inclined plane of sloping block one 82 contacts with the inclined plane of adjacent sloping block two 92, in order to release annular ejector pad 9 when fan-shaped ejector pad 8 expands, make hollow slide bar 5 slide through ejecting subassembly when movable mould 4 opens, so that fan-shaped ejector pad 8 and annular ejector pad 9 ejecting shaping product 32.

Referring to fig. 2-4, the water passing assembly comprises a main water inlet pipe 111, a water passing hose 112, a first water passing ring 113 and a second water passing ring 114, wherein the upper side inside the working box 2 is connected with the main water inlet pipe 111 with the left end extending out, the left ends of the left four hollow slide bars 5 are fixedly connected with the first water passing ring 113 communicated with the left water passing inner pipe 6 together, the right ends of the right four hollow slide bars 5 are fixedly connected with the second water passing ring 114 communicated with the right water passing inner pipe 6 together, and the first water passing ring 113, the second water passing ring 114 and the main water inlet pipe 111 are all communicated with the water passing hose 112.

Referring to fig. 2, 3 and 10, the ejector assembly includes a moving frame 121, return springs 122, compression springs 123 and a fixing frame 124, the upper side inside the working box 2 is slidingly connected with the moving frame 121 connected with the moving die 4, a plurality of return springs 122 are fixedly connected between the moving frame 121 and the working box 2, four compression springs 123 are fixedly connected between the second water ring 114 and the moving die 4, the fixing frame 124 is welded on the right side inside the working box 2, and the second water ring 114 moves to the right and contacts with the fixing frame 124.

At the beginning, the first return spring 81 is in a compressed state, firstly, plastics are added into the feed hopper 103, the heating conveyor 102 plasticizes and conveys the plastics, the plasticized plastics are injected into a cavity through the injection head 101, after the molded product 32 is molded, cooling water is introduced through the main water inlet pipe 111, the cooling water enters the first water through hose 112 into the first water through ring 113 and the second water through ring 114, the cooling water reenters the inner water through pipe 6, thereby cooling the molded product 32, because the end part of the inner water through pipe 6 is connected to the connecting block 7, the positions of the connecting block 7, the fan-shaped push block 8 and the annular push block 9 are not excessively high in temperature under the heat conduction effect, when the movable mold 4 moves to the right for mold opening, the movable frame 121, the first water through ring 113, the second water through ring 114 and the hollow slide bars 5 are driven to move to the right, the return spring 122 is compressed, the four hollow slide bars 5 at the left side slide to the right relative to the fixed mold 3, the connecting block 7, the fan-shaped push block 8 and the annular push block 9 close to one side of the fixed die 3 leave the corresponding round platform groove 31, the first reset spring 81 is restored, the fan-shaped push block 8 is driven to move and spread out radially towards one side far away from the water through pipe 6, the second inclined block 92 is pushed by the first inclined block 82, the annular push block 9 stretches out relative to the connecting block 7, the second reset spring 91 stretches, the molded product 32 is ejected out of the fixed die 3 through the fan-shaped push block 8 and the annular push block 9 close to one side of the fixed die 3, when the water through ring 114 contacts with the fixed frame 124, the water through ring 114 and the four hollow slide bars 5 on the right side stop moving, the movable die 4 continues to move to the right, the compression spring 123 compresses, the connecting block 7 close to one side of the movable die 4, the fan-shaped push block 8 and the annular push block 9 also leave the corresponding round platform groove 31, and the fan-shaped push block 8 can spread out under the action of the first reset spring 81, the annular push block 9 stretches out, thereby the fan-shaped push block 8 and the annular push block 9 which are close to one side of the movable mould 4 push the formed product 32 out of the movable mould 4, and then the product is automatically pushed out, the contact area between the fan-shaped push block 8 and the annular push block 9 and the formed product 32 is smaller, the contact position between the fan-shaped push block 8 and the formed product 32 can be changed when the fan-shaped push block 8 is unfolded, the annular push block 9 can further push the formed product 32 out, the formed product 32 can be prevented from being stuck on the fan-shaped push block 8 and the annular push block 9, the demoulding efficiency is higher without the need of manually assisting demoulding or increasing cooling time, after demoulding is completed, when the movable mould 4 moves to the left for mould closing, the movable frame 121, the first water through ring 113, the second water through ring 114 and the hollow slide rod 5 are driven to move to reset to the left, the second water through ring 114 is separated from the fixed frame 124, the compression spring 123 is driven to reset, the fan-shaped push block 8 and the annular push block 9 are driven to move to reset, the fan-shaped push block 8 is contracted through the circular table groove 31, the first reset spring 81 is compressed, the first inclined block 82 is not extruded the second inclined block 92, and the second movable block 91 is driven to reset, and the annular push block 9 is reset to be reset.

Example 2: on the basis of embodiment 1, referring to fig. 2 and 3, the hydraulic cylinder 13 is further included, two hydraulic cylinders 13 are fixedly bolted to the right side inside the working box 2, movable rods of the hydraulic cylinders 13 are fixedly connected with the right side of the movable die 4, and the movable die 4 is driven to move left and right through the hydraulic cylinders 13, so that the die opening and die closing work is completed.

Referring to fig. 1, fig. 2, fig. 3 and fig. 11, the device further comprises a liquid storage tank 141, a water pump 142, a liquid passing hose 143 and a spray head 144, wherein liquid passing cavities are formed between the outer part of the water passing inner pipe 6 and the inner part of the adjacent hollow slide rod 5, the liquid passing cavities are not communicated with the inner part of the water passing inner pipe 6, the lower part of the left side of the working tank 2 is connected with the liquid storage tank 141 provided with a liquid inlet, the water pump 142 is internally installed in the liquid storage tank 141, a water outlet of the water pump 142 is communicated with the hollow slide rod 5 through the liquid passing hose 143, and a plurality of spray heads 144 communicated with the liquid passing cavities are installed on the outer side of the hollow slide rod 5 close to one end of the cavity.

The release agent is added into the liquid storage tank 141 through the liquid inlet, when the movable mould 4 moves to the right to open the mould, the spray head 144 is driven to move to the right to leave the circular table groove 31, the water pump 142 is controlled to pump the release agent in the liquid storage tank 141, the release agent flows into the liquid through cavity from the liquid through hose 143, and then the release agent is sprayed out to the surface of the molded product 32 from the spray head 144, so that the molded product 32 can be assisted to be released, and adhesion is avoided.

While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. The scope of the disclosure should, therefore, not be limited to the above-described embodiments, but should be determined not only by the following claims, but also by the equivalents of the following claims.

Claims (10)

1. Plastic forming die convenient to product is ejecting, including injection molding machine (1), work box (2), cover half (3) and movable mould (4), injection molding machine (1) are installed in work box (2) one side, but the inside cover half (3) of fixing and movable mould (4) that are equipped with of work box (2), characterized by: still including hollow slide bar (5), inner tube (6) that leads to water, connecting block (7), fan-shaped ejector pad (8), reset spring one (81), annular ejector pad (9), reset spring two (91), ejecting subassembly and lead to water subassembly, equal sliding connection has many hollow slide bars (5) that are circumference distribution on cover half (3) and movable mould (4), hollow slide bar (5) inside all is equipped with inner tube (6) that leads to cooling water through the water subassembly, hollow slide bar (5) are close to the one end of die cavity all be connected with connecting block (7) that lead to inner tube (6) intercommunication, all sliding connection has fan-shaped ejector pad (8) that a plurality of returns through reset spring one (81) on connecting block (7), one side that connecting block (7) are close to the die cavity all sliding connection has annular ejector pad (9) that return through reset spring two (91), make hollow slide bar (5) slide through ejecting subassembly when movable mould (4) die sinking, so that fan-shaped ejector pad (8) and annular ejector pad (9) ejecting molded product (32).

2. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: a plurality of circular truncated cone grooves (31) matched with the fan-shaped push blocks (8) are formed in one sides of the fixed die (3) and the movable die (4) close to the die cavity, the circular truncated cone grooves (31) are gradually enlarged towards the direction close to the die cavity, the fan-shaped push blocks (8) are abutted to the fixed die (3) or the movable die (4) under the action of the circular truncated cone grooves (31), and the fan-shaped push blocks (8) are unfolded through a first reset spring (81) after the movable die (4) is opened.

3. A plastic molding die for facilitating ejection of a product as defined in claim 2, wherein: the sector pushing blocks (8) are provided with first inclined blocks (82), one sides of the annular pushing blocks (9) far away from the die cavity are provided with second inclined blocks (92) at equal circumferential intervals, and the inclined surfaces of the first inclined blocks (82) are contacted with the inclined surfaces of the adjacent second inclined blocks (92) so as to push out the annular pushing blocks (9) when the sector pushing blocks (8) are unfolded.

4. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: the water passing assembly comprises a main water inlet pipe (111), a water passing hose (112), a first water passing ring (113) and a second water passing ring (114), wherein the main water inlet pipe (111) extending from the left end is connected to the upper side inside the working box (2), the first water passing ring (113) communicated with the left water passing inner pipe (6) is commonly connected between the left ends of the left hollow slide bars (5), the second water passing ring (114) communicated with the right water passing inner pipe (6) is commonly connected between the right ends of the right hollow slide bars (5), and the first water passing ring (113) and the second water passing ring (114) are both communicated with the main water inlet pipe (111).

5. A plastic molding die for facilitating ejection of a product as defined in claim 4, wherein: the ejection assembly comprises a movable frame (121), a return spring (122), compression springs (123) and a fixed frame (124), wherein the movable frame (121) connected with the movable mould (4) is slidingly connected on the upper side inside the working box (2), the movable frame (121) is reset through the return spring (122), a plurality of compression springs (123) are connected between the water ring II (114) and the movable mould (4), the fixed frame (124) is fixedly connected on the right side inside the working box (2), and the water ring II (114) can be contacted with the fixed frame (124) in the mould opening process.

6. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: the hydraulic press is characterized by further comprising a hydraulic cylinder (13), wherein the right side inside the working box (2) is fixedly connected with two hydraulic cylinders (13), and movable rods of the hydraulic cylinders (13) are fixedly connected with the right side of the movable die (4).

7. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: a liquid-passing cavity is formed between the outer part of the inner water-passing pipe (6) and the inner part of the adjacent hollow slide rod (5), and the liquid-passing cavity is not communicated with the inner part of the inner water-passing pipe (6).

8. A plastic molding die for facilitating ejection of a product as defined in claim 7, wherein: still including liquid reserve tank (141), water pump (142), logical liquid hose (143) and shower nozzle (144), work box (2) one side is connected with liquid reserve tank (141) that are equipped with the inlet, and liquid reserve tank (141) internally mounted has water pump (142), communicates through logical liquid hose (143) between the delivery port of water pump (142) and hollow slide bar (5), and hollow slide bar (5) are close to outside of die cavity one end and install a plurality of shower nozzle (144) that hold the chamber intercommunication with logical liquid.

9. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: the injection molding machine (1) comprises an injection head (101), a heating conveyor (102) and a feed hopper (103), wherein the heating conveyor (102) provided with the feed hopper (103) is arranged on one side of the working box (2), and the injection head (101) for injecting plasticized plastic into the cavity is arranged between the heating conveyor (102) and the fixed die (3).

10. A plastic molding die for facilitating ejection of a product as defined in claim 1, wherein: the working box (2) is provided with radiating holes and is provided with a radiating fan, and the bottom of the working box (2) is provided with a guide plate which is obliquely arranged and made of soft materials.