CN216683053U

CN216683053U - Manufacturing equipment for hollow plastic parts with uniform wall thickness

Info

Publication number: CN216683053U
Application number: CN202123022605.5U
Authority: CN
Inventors: 金耀青; 周伟军
Original assignee: Guangdong Green Precision Components Co Ltd
Current assignee: Guangdong Green Precision Components Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-06-07
Anticipated expiration: 2031-12-03

Abstract

The utility model discloses a manufacturing device of a hollow plastic part with uniform wall thickness, which comprises a first molding device, a second molding device and a transfer device, wherein the first molding device comprises a first turntable, a first movable mold and a first fixed mold; the second molding device comprises a second turntable, a second movable mold and a second fixed mold, and a first front mold core loaded with the injection molding product and the insert and a second front mold core of the second movable mold form a second molding cavity at the lower half side of the molding plastic part. According to the utility model, through two sets of forming devices, the injection molding is carried out twice on the upper side and the lower side, the insert tightly supports the first movable mold when the product on the upper half side is injected, only the upper half side of the insert is left to participate in the injection molding once, the insert is attached to the product on the upper half side when the product on the lower half side is injected, the lower half side of the insert participates in the injection molding twice, the insert is fastened and does not deviate in the whole process, the uniform wall thickness of the periphery of the hollow plastic part is ensured, and the yield of the product is high.

Description

Manufacturing equipment for hollow plastic parts with uniform wall thickness

Technical Field

The utility model relates to the technical field of injection molding processing equipment, in particular to manufacturing equipment for a hollow plastic part with uniform wall thickness.

Background

The injection molding has the advantages of high production speed, high efficiency, automation of operation, various colors and varieties, various shapes from simple to complex, small sizes, accurate product size, easy replacement of products, capability of forming products with complex shapes, and suitability for the fields of mass production, products with complex shapes and the like. The injection molding process can be roughly divided into the following 6 stages: closing the mold, injecting glue, maintaining the pressure, cooling, opening the mold and taking out the product. The above process is repeated, and the products can be produced in batch and periodically.

The injection molding can be divided into one-time injection molding and two-time injection molding, wherein the one-time injection molding can produce the product after completing 1 time of the 6 stages, and the two-time injection molding can produce the product after completing 2 times of the 6 stages. The hollow plastic parts, such as the glasses leg sleeves, are hollow plastic parts with a closed tail part and uniform wall thickness on the periphery, and are usually manufactured by a method of pulling out an insert in an injection molding part after injection molding. Utilize one set of mould to produce cavity plastic part through injection moulding, because the plug-in components are unsettled, can lead to the plug-in components skew during moulding plastics, can not guarantee that the wall thickness all around of cavity plastic part is even, cause the yields to hang down.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a manufacturing apparatus for hollow plastic parts with uniform wall thickness, so as to solve the above problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the equipment for manufacturing the hollow plastic parts with uniform wall thickness comprises a first molding device for performing one-time injection molding, a second molding device for performing two-time injection molding and a transfer device for transferring a semi-finished product generated by the first molding device to the second molding device. The first molding device comprises a first turntable, a first movable mold arranged on the first turntable, and a first fixed mold used for pressing a first front mold core and matching with the first movable mold, wherein a first molding cavity used for molding the upper half side of the plastic part is formed by a rear mold core of the first movable mold and the first front mold core clamping plug-in unit; the second molding device comprises a second turntable, a second movable mold and a second fixed mold, the second movable mold is arranged on the second turntable and used for loading the first front mold core, the second fixed mold is matched with the second movable mold, and after the first injection molding, the first front mold core and the second front mold core of the second fixed mold are loaded with an injection molding product and the plug-in unit to form a second molding cavity for molding the lower half side of the plastic part.

Furthermore, the first front mold core is provided with a first injection molding hole for one-time molding feeding, an upper molding cavity for one-time molding and a first clamping groove for installing the plug-in, the first injection molding hole is communicated with the upper molding cavity through a first runner, and a third through hole convenient for a third ejector pin component to demold the product is arranged at the bottom of the first clamping groove.

Furthermore, the two sides of the first front mold core are connected with locking blocks which are convenient for the transfer device to clamp.

Furthermore, the rear mold core is provided with a first limiting groove for limiting the plug-in, a first through hole arranged in the first limiting groove and a first guide through hole convenient for guiding and inserting of the locking block, and a first ejector pin assembly convenient for ejecting the plug-in is arranged in the first through hole.

Furthermore, four corners of the first front mold core are provided with first grooves, and four corners of the rear mold core are provided with first limiting lugs matched with the first grooves.

Furthermore, four corners of the second front mold core are provided with second limiting convex blocks matched with the first grooves.

Furthermore, the second front mold core is provided with a second limiting groove for limiting the insert, a second through hole arranged at the bottom of the second limiting groove, a second guide through hole convenient for guiding and inserting the locking block, a second injection molding hole for secondary molding feeding and a lower molding cavity for secondary injection molding products, the second injection molding hole is communicated with the lower molding cavity through a second pouring gate, and a second ejector pin assembly convenient for ejecting out secondary injection molding finished products is arranged in the second through hole.

The method comprises the following steps: when the first fixed die and the first movable die are separated, the first front die core provided with the insert is placed into the first movable die, then the first fixed die is controlled to move downwards, the first front die core is abutted against the rear die core, the insert is attached to the rear die core, the first front die core and the rear die core are assembled to form a first molding cavity for producing an upper half side injection part, a first injection valve is opened for one-time injection molding to form an upper half side product, and the first fixed die moves upwards;

step two: the first rotating disc rotates 180 degrees, at the moment, the first movable mould cavity under the first fixed mould is formed, and the first step is repeated; meanwhile, on the first movable die with the upper half side product on the other side of the first rotary table, the first ejector pin component jacks up the plug-in unit, and meanwhile, the transfer device grabs the locking block to drive the upper half side product carrying the plug-in unit to be placed into the second movable die along with the turning of the first front die core;

step three: the second fixed die drives the second front die core to move downwards, the second front die core is abutted against the first front die core on the second movable die, the first front die core carrying the insert and the upper half side product is matched with the second front die core to form a second molding cavity, a second injection valve is opened for secondary injection molding, a finished product is formed with the upper half side product, the second fixed die moves upwards, and the third ejector pin component pushes the insert to complete the demolding of the upper half product;

step four: rotating the second turntable by 180 degrees, and repeating the third step when the cavity of the second movable mold below the second fixed mold is formed; meanwhile, on the second movable die on the other side of the second turntable, the second ejector pin component below the second movable die jacks up the plug-in unit to drive a finished product to be ejected out;

step five: and pulling out the plug-in unit in the injection molding part to obtain the finished product, namely the hollow plastic part with uniform wall thickness.

The utility model has the beneficial effects that: compared with the prior art, the manufacturing equipment of the hollow plastic part with uniform wall thickness is provided with two sets of molding devices, a first front mold core provided with the plug-in unit in the first molding device is abutted against a rear mold core to be molded into an upper half side injection molding part, a transfer device overturns and delivers a first front mold core carrying an upper half side product and the plug-in unit into a second movable mold of a second molding device to be matched with the second front mold core to be abutted against, and a lower half side injection molding part is molded, so that a complete injection molding part is formed; through the upper and lower both sides of separately moulding plastics, the plug-in components support tight first movable mould when the product of first side is moulded plastics, only leaves the first side of plug-in components to participate in once moulding plastics, and the plug-in components support tight first side product when the product of second side is moulded plastics, and the second side of plug-in components participates in the secondary and moulds plastics, so whole plug-in components fastening, do not swing, guarantee that the wall thickness all around of shaping plastic part is even, promote the yields.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a subdivision architecture of the present invention;

FIG. 3 is a schematic view of the first stationary mold and the first front mold insert;

FIG. 4 is a schematic view of a first movable mold structure according to the present invention;

FIG. 5 is a schematic view of a second front mold insert according to the present invention;

FIG. 6 is a schematic view of the locking block of the present invention;

the names of the components identified in the figures are as follows: 1. a first molding device; 2. a second molding device; 3. a transfer device; 4. a first stationary mold; 5. a first movable mold; 6. a second stationary mold; 7. a second movable mold; 8. a locking block; 81. a fourth via hole; 82. a fifth through hole; 9. a first groove; 10. an upper molding cavity; 11. a first injection molding hole; 12. a first runner; 13. a third thimble assembly; 14. a first card slot; 15. a first limit bump; 16. a first guide through hole; 17. a first limit groove; 18. a first through hole; 19. a first thimble assembly; 20. a second limit bump; 21. a lower molding cavity; 22. a second guide through hole; 23. a second limit groove; 24. a second runner; 25. a second thimble assembly; 26. a second injection molding hole; 27. a third through hole; 28. a first turntable; 29. a second turntable; 30. a plug-in; 31. a first front mold core; 33. a rear mold core; 34. a second front mold core; 35. a second via.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the description is only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 and 2, the apparatus for manufacturing a hollow plastic part with a uniform wall thickness according to the present invention includes a first molding device 1 for performing a first injection molding, a second molding device 2 for performing a second injection molding, and a transferring device 3 for transferring a semi-finished product generated by the first molding device 1 to the second molding device 2; the first molding device 1 comprises a first turntable 28, first movable molds 5 arranged on the first turntable 28 and first fixed molds 4 used for pressing a first front mold core 31 and the first movable molds 5 to be matched, the two first movable molds 5 are symmetrically arranged on the first turntable 28 and are used alternately, the production efficiency is accelerated, and the next station operation is not influenced at the same time; the second molding device 2 comprises a second turntable 29, a second movable mold 7 arranged on the second turntable 29 and used for loading a first front mold core 31, and a second fixed mold 6 matched with the second movable mold 7, wherein the two second movable molds 7 are symmetrically arranged on the second turntable 29, the first front mold core 31 loaded with a once injection molded product and an insert 30 after once injection molding and a second front mold core 34 of the second fixed mold are matched to form a second molding cavity used for molding the lower half side of a plastic part, and the insert 30 is attached to a product on the upper half side and is not separated.

Referring to fig. 3, the first front mold core 31 is provided with a first injection hole 11 for one-time molding feeding, an upper molding cavity 10 for one-time molding products and a first clamping groove 14 for installing the plug-in components 30, the first injection hole 11 is communicated with the upper molding cavity 10 through a first runner 12, glue is injected into the first injection hole 11 through an injection molding machine, the glue is distributed to each branch channel through the first runner 12 and then flows to each upper molding cavity 10, a third through hole 27 convenient for the third ejector pin component 13 to demold the products is arranged at the bottom of the first clamping groove 14, the third ejector pin component 13 is arranged below the second movable mold 7, and when the products are finally demolded, the head of the ejector pin plug-in components 30 of the third ejector pin component 13 is not in direct contact with the products, so that loss of the products during demolding is reduced.

Referring to fig. 4 and 6, the two sides of the first front mold core 31 are connected with locking blocks 8, the locking blocks 8 are fixed in the first front mold core 31 through bolts, the upper half of the locking blocks 8 is provided with a fourth through hole 81 and a fifth through hole 82, the transfer device 3 grabs the fourth through hole 81 and the fifth through hole 82 for stable turnover, the rear mold core 33 is provided with a first limiting groove 17 for limiting the insert 30, a first through hole 18 arranged at the bottom of the first limiting groove 17 and a first guiding through hole 16 for guiding the locking blocks 8 to insert, a first thimble assembly 19 for facilitating ejection of the insert 30 is arranged in the first through hole 16, the first limiting groove facilitates hiding of the lower half of the insert 30 and prevents the insert 30 from swinging, the bottom of the first limiting groove 17 is uniformly provided with a plurality of first through holes 18 in the length direction, a plurality of thimbles are arranged corresponding to the first thimble assembly 19 arranged under the first movable mold 5, when the first front mold core 31 is separated from the first movable mold 5, the plurality of ejector pins uniformly jack up the insert 30, so that the insert 30 and a product are relatively stable in the first front mold core 31 and cannot be partially separated or deviated.

Referring to fig. 3 and 4, four corners of the first front mold core 31 are provided with first grooves 9, four corners of the rear mold core 33 are provided with first limiting protrusions 15 matched with the first grooves 9, and the first limiting protrusions 15 are matched with the first grooves 9 except for the guiding of the locking blocks 8, so that the guiding of the direction during mold closing is facilitated, the position is limited twice, and the position precision is ensured.

Referring to fig. 3 and 5, the second front mold core 34 has second limiting protrusions 20 at four corners thereof, which are engaged with the first recesses 9.

Referring to fig. 5, the second front mold core 34 is provided with a second limiting groove 23 for limiting the insert 30, a second through hole 35 arranged at the bottom of the second limiting groove 23, a second guiding through hole 22 for guiding the locking block 8 to insert, a second injection molding hole 26 for overmolding feeding, and a lower molding cavity 21 for overmolding products, wherein the second injection molding hole 26 is communicated with the lower molding cavity 21 through a second runner 24, and a second thimble assembly 25 for ejecting the overmolding products is arranged in the second through hole 22. In this scheme, be equipped with four last one-tenth die cavity 10 of moulding plastics first side product on the first front mould benevolence 31, also be provided with four lower one-tenth die cavity 21 on the second front mould benevolence 34, it is the same with the quantity in lower one-tenth die cavity 21 to go up one-tenth die cavity 10, and the quantity in lower one-tenth die cavity 21 and last one-tenth die cavity 10 can be selected according to the size of mould and injection molding, does not specifically do the injecing.

The working principle of the embodiment is as follows:

the method comprises the following steps: when the first fixed die 4 and the first movable die 5 are separated, the first front die core 31 provided with the insert 30 is placed into the first movable die, then the first fixed die 4 is controlled to move downwards, the first front die core 31 is abutted against the rear die core 33, the insert 30 is attached to the rear die core 33, the first front die core 31 and the rear die core 33 are assembled to form a first molding cavity for producing an upper half side injection molding part, a first injection valve is opened, injection molding is carried out for one time, an upper half side product is formed, and the first fixed die 4 moves upwards;

step two: the first rotating disc 28 rotates 180 degrees, at this time, the cavity of the first movable mould 5 under the first fixed mould 4 is formed, and the first step is repeated; meanwhile, on the first movable die 5 with the product on the upper half side on the other side of the first turntable 28, the first ejector pin assembly 19 below the first movable die 5 jacks up the insert 30, meanwhile, the transfer device 3 grabs the locking block 8 to drive the formed product on the upper half side carrying the insert 30 to be turned over along with the first front die core 31 and put into the second movable die 7, and the transfer device 33 can directly use the robot without considering the cost condition;

step three: the second fixed die 6 drives the second front die core to move downwards, the second front die core 34 is abutted against the first front die core 31 on the second movable die 7, at the moment, the first front die core 31 carrying the plug-in piece 30 and the upper half side product is matched with the second front die core 34 to form a second molding cavity, a second injection valve is opened for secondary injection molding, a finished product is formed with the upper half side product, the second fixed die 6 moves upwards, and the third ejector pin assembly 13 pushes the plug-in piece 30 to complete the demoulding of the upper half product;

step four: the second turntable 29 rotates 180 degrees, and at the moment, the cavity of the second movable mold 7 below the second fixed mold 6 is formed, and the third step is repeated; meanwhile, on the second movable die 7 on the other side of the second turntable 29, the second ejector pin assembly 25 below the second movable die 7 jacks up the plug-in component 30 to drive the finished product to be ejected out;

step five: and then, the insert 30 in the injection molding piece is pulled out, and the finished product is the hollow plastic piece with uniform wall thickness.

While the preferred embodiments of the present invention have been illustrated and described, 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 utility model as defined by the appended claims.

Claims

1. The utility model provides a manufacturing equipment of even cavity plastic part of wall thickness which characterized in that: the injection molding device comprises a first molding device (1) for performing primary injection molding, a second molding device (2) for performing secondary injection molding and a transfer device (3) for transferring a semi-finished product generated by the first molding device (1) to the second molding device (2); the first molding device (1) comprises a first turntable (28), a first movable mold (5) arranged on the first turntable (28) and a first fixed mold (4) used for pressing a first front mold core (31) and the first movable mold (5) in a matched mode, wherein a rear mold core (33) of the first movable mold (5) and the first front mold core (31) clamp an insert (30) to form a first molding cavity used for molding the upper half side of a plastic part; the second molding device (2) comprises a second turntable (29), a second movable mold (7) arranged on the second turntable (29) and used for loading a first front mold core (31) and a second fixed mold (6) matched with the second movable mold (7), wherein the first front mold core (31) loaded with a once injection molding product and an insert (30) after once injection molding and the second front mold core (34) of the second fixed mold (6) are assembled to form a second molding cavity for molding the lower half side of a plastic part.

2. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 1, wherein: the first front die core (31) is provided with a first injection molding hole (11) for one-step molding feeding, an upper molding cavity (10) for one-step molding and a first clamping groove (14) for installing an insert (30), the first injection molding hole (11) is communicated with the upper molding cavity (10) through a first runner (12), and the bottom of the first clamping groove (14) is provided with a third through hole (27) for facilitating the third thimble assembly (13) to demold a product.

3. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 1, wherein: the two sides of the first front mold core (31) are connected with locking blocks (8) which are convenient for the transfer device (3) to clamp.

4. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 3, wherein: the rear die core (33) is provided with a first limiting groove (17) for limiting the plug-in (30), a first through hole (18) arranged at the bottom of the first limiting groove (17) and a first guide through hole (16) for facilitating the guide insertion of the locking block (8), and a first ejector pin assembly (19) for facilitating the ejection of the plug-in (30) is arranged in the first through hole (18).

5. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 1, wherein: four corners of the first front mold core (31) are provided with first grooves (9), and four corners of the rear mold core (33) are provided with first limiting lugs (15) matched with the first grooves (9).

6. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 5, wherein: the four corners of the second front mold core (34) are provided with second limit lugs (20) matched with the first grooves (9).

7. The apparatus for manufacturing a hollow plastic part having a uniform wall thickness according to claim 1, wherein: the second front mold core (34) is provided with a second limiting groove (23) for limiting the plug-in (30), a second through hole (35) formed in the bottom of the second limiting groove (23), a second guiding through hole (22) convenient for the locking block (8) to be guided and inserted, a second injection molding hole (26) used for secondary molding feeding and a lower molding cavity (21) used for secondary injection molding products, the second injection molding hole (26) is communicated with the lower molding cavity (21) through a second pouring gate (24), and a second ejector pin assembly (25) convenient for ejecting secondary injection molding finished products is arranged in the second through hole (35).