CN218838425U

CN218838425U - Polypropylene air-assisted injection mold

Info

Publication number: CN218838425U
Application number: CN202222962998.6U
Authority: CN
Inventors: 周伟军; 杨吉龙
Original assignee: Taizhou Huangyan Yuntian Molding Co ltd
Current assignee: Taizhou Huangyan Yuntian Molding Co ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-04-11
Anticipated expiration: 2032-11-03

Abstract

The utility model provides an injection mold is assisted to air in polypropylene belongs to mould technical field. The upper die plate and the lower die plate are respectively fixed with an upper insert and a lower insert which are inserted between the two side inserts, and a tail forming cavity connected with the head forming cavity is arranged between the upper insert and the lower insert. When the upper die plate and the lower die plate are separated, the two side inserts can be driven by the driving structure to move outwards so that the product is located in the head forming cavity part and separated from the side inserts, the adhesion area of the product is reduced, after the side inserts move, the product is supported on the lower insert ejection mechanism, the product is located in the tail forming cavity part and separated from the lower insert ejection mechanism through the ejection mechanism, and the probability of surface damage of the product can be greatly reduced.

Description

Polypropylene air-assisted injection mold

Technical Field

The utility model belongs to the technical field of the mould, a injection mold is assisted to air in polypropylene is related to.

Background

Among the prior art, thereby conventional gas-assisted mould can let in gas to the shaping intracavity through high-pressure intake pipe and can form hollow structure in the product is inside, but because such product wall thickness is less, if use conventional cope match-plate pattern and the lower bolster combination to form the shaping chamber of cutting apart from top to bottom, the latter half of product can adhere on the lower bolster after the die sinking, the adhesion area of product and lower bolster is big when ejecting, it is wounded or appear the phenomenon that the surface was torn the deformation with the lower bolster adhesion department by the top to appear the product very easily, consequently, need design one kind and can realize that the mould breaks away from through ejection mechanism ejecting mould again with the product earlier, in order to prevent above-mentioned problem.

In order to overcome the defects of the prior art, various solutions are proposed through continuous exploration, for example, a gas-assisted injection mold is disclosed in a chinese patent application No. [ application number: 201920954964.8] comprising a fixed die and a movable die, wherein the fixed die and the movable die are buckled up and down, a dermatoglyph insert, an ejector block and a heat conduction insert are arranged at an air passage in a parting surface of the movable die, a first cooling passage is arranged in the dermatoglyph insert, and a second cooling passage is arranged in the ejector block; the heat conduction insert is made of high heat conduction materials and is connected with the bottom of the dermatoglyph insert into a whole, the ejector block is installed on the side portion of the dermatoglyph insert, and an air passage is formed among the dermatoglyph insert, the ejector block and the fixed die.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide an injection mold is assisted to air in polypropylene.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides an injection mold is assisted to polypropylene cavity gas, includes cope match-plate pattern and lower bolster, the lower bolster on the symmetry be provided with two sides that insert in the cope match-plate pattern, head shaping chamber has between two side inserts, cope match-plate pattern and lower bolster on still be fixed with respectively insert to two sides insert between last insert and insert down, last insert and insert down between have with the afterbody shaping chamber that the head shaping chamber links to each other, afterbody shaping chamber keep away from head shaping chamber one side to the left and right sides branching, the cope match-plate pattern on still be equipped with the gas that is used for at the inside cavity body that forms of product and assist the structure, cope match-plate pattern and lower bolster on still be equipped with the drive structure that can drive the side insert along the horizontal direction translation.

In foretell polypropylene cavity gas assists injection mold, gas assist structure including fixing the intake pipe fixed plate on the cope match-plate pattern, the intake pipe fixed plate on be equipped with the bottom and insert No. one high-pressure intake pipe to the head shaping intracavity, the cope match-plate pattern on still link firmly No. two high-pressure intake pipes.

In the polypropylene air-assisted injection mold, the air inlet pipe fixing plate is arranged on one side of the upper template, which is far away from the upper insert.

In the polypropylene air-assisted injection mold, the first high-pressure air inlet pipe and the second high-pressure air inlet pipe are respectively connected with the head end and the tail end of the head forming cavity.

In the polypropylene air-assisted injection mold, the upper template is fixedly connected with an injection molding pipe, and the bottom of the injection molding pipe is connected with the head forming cavity through an injection molding block with a small-caliber injection needle.

In the above polypropylene hollow gas-assisted injection mold, the driving structure comprises two driving blocks arranged on the lower template, the upper template is fixedly connected with two obliquely arranged driving rods, the driving rods are obliquely inserted into the driving blocks, and the driving blocks are fixedly connected with the side insert blocks.

In foretell polypropylene cavity gas assists injection mold, the lower bolster on still be equipped with the spacing groove with drive block looks adaptation, the drive block embedding to spacing inslot and with spacing groove sliding connection, the lower bolster on still be equipped with spacing clamp plate, the side insert and the drive block outside be equipped with the vertical spacing portion that the level outwards extends to spacing clamp plate bottom.

In the polypropylene air-assisted injection mold, the lower template is further provided with an inward-recessed insert groove, and when the two side inserts are combined to form a head forming cavity, a sliding gap is formed between the outer side wall of each side insert and the side wall of the insert groove.

In the polypropylene air-assisted injection mold, the upper template is also provided with an anti-retreat structure inserted into the sliding gap.

In the polypropylene hollow gas-assisted injection mold, the anti-retreating structure comprises an anti-retreating plate fixed on the upper mold plate, when the upper mold plate and the lower mold plate are closed, the anti-retreating plate is inserted into the sliding gap, and the inner end and the outer end of the anti-retreating plate are respectively abutted against the outer side wall of the side insert and the side wall of the insert groove.

Compared with the prior art, the utility model has the advantages of:

1. during cope match-plate pattern and lower bolster separation, thereby can drive two sides through drive structure and insert outside translation and make the product be located head shaping cavity part and the side and insert the separation, reduce the adhesion area of product, the side is inserted and is removed the back, the product bearing is inserted ejection mechanism down on, rethread ejection mechanism is located afterbody shaping cavity part with the product and is inserted ejecting the separation down, can the probability of greatly reduced product surface damage, thereby the gas is assisted the structure and can be injected into high-pressure gas to head shaping cavity and afterbody shaping intracavity when the product is moulded plastics and form the cavity in the product inside.

2. Thereby can let in head shaping chamber and afterbody shaping intracavity with high-pressure gas through high-pressure intake pipe and No. two high-pressure intake pipe and form the cavity in the product is inside.

3. The driving rod that can drive the slope setting when cope match-plate pattern vertical upward movement rises along vertical direction, and the vertical rising of the actuating rod of slope can drive the outside translation of drive block level, thereby the outside translation of drive block can drive the outside translation of side insert level and can make side insert and product separation.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic structural view of the lower template;

fig. 3 is a partial structural schematic view of the lower template.

In the figure, an upper template 1, a lower template 2, a side insert 3, a head forming cavity 4, an upper insert 5, a lower insert 6, a tail forming cavity 7, an air auxiliary structure 8, a driving structure 9, an air inlet pipe fixing plate 10, a first high-pressure air inlet pipe 11, a second high-pressure air inlet pipe 12, an injection molding pipe 13, a small-caliber injection needle 14, an injection molding block 15, a driving block 16, a driving rod 17, a limiting groove 18, a limiting pressing plate 19, a vertical limiting part 20, an insert groove 21, a sliding gap 22 and an anti-backing plate 23.

Detailed Description

As shown in fig. 1-3, a polypropylene hollow gas-assisted injection mold comprises an upper mold plate 1 and a lower mold plate 2, wherein two side inserts 3 inserted into the upper mold plate 1 are symmetrically arranged on the lower mold plate 2, a head forming cavity 4 is arranged between the two side inserts 3, an upper insert 5 and a lower insert 6 inserted between the two side inserts 3 are respectively fixed on the upper mold plate 1 and the lower mold plate 2, a tail forming cavity 7 connected with the head forming cavity 4 is arranged between the upper insert 5 and the lower insert 6, the tail forming cavity 7 is separated from the head forming cavity 4 and is branched towards the left side and the right side, a gas-assisted structure 8 for forming a hollow cavity inside a product is further arranged on the upper mold plate 1, and a driving structure 9 capable of driving the side inserts 3 to horizontally move is further arranged on the upper mold plate 1 and the lower mold plate 2.

The utility model discloses in, during cope match-plate pattern and lower bolster separation, thereby can insert outside translation through two sides of drive structure drive and make the product be located head shaping chamber portion and the side breaks away from of inserting, reduce the adhesion area of product, the side is inserted and is removed the back, the product bearing is inserted on ejection mechanism with inserting down, rethread ejection mechanism is located afterbody shaping chamber portion with the product and inserts ejecting breaking away from down, probability that can greatly reduced product surface damage, thereby gas is assisted the structure and can be when the product is moulded plastics to head shaping chamber and afterbody shaping intracavity injection high-pressure gas at the inside cavity that forms of product.

Specifically, the product material in the present application is polypropylene.

With reference to fig. 2 and 3, the gas-assisted structure 8 comprises a gas inlet pipe fixing plate 10 fixed on the upper template 1, the gas inlet pipe fixing plate 10 is provided with a first high-pressure gas inlet pipe 11 with the bottom inserted into the head forming cavity 4, and the upper template 1 is fixedly connected with a second high-pressure gas inlet pipe 12. Thereby can let in head shaping chamber and afterbody shaping intracavity with high-pressure gas through high-pressure intake pipe and No. two high-pressure intake pipe and form the cavity in the product is inside.

Preferably, as shown in fig. 2 and 3, the air inlet pipe fixing plate 10 is disposed on one side of the upper die plate 1 away from the upper insert 5, and the first high-pressure air inlet pipe 11 and the second high-pressure air inlet pipe 12 are connected to the head and tail ends of the head forming cavity 4, respectively.

Preferably, as shown in fig. 3, an injection molding pipe 13 is further fixedly connected to the upper mold plate 1, and the bottom of the injection molding pipe 13 is connected to the head forming cavity 4 through an injection molding block 15 having a small-bore injection needle 14. The injection molding pipe can reduce the area of a sprue by injecting injection liquid into the head forming cavity through a small-caliber injection needle on the injection molding block, so that the surface quality of a product can be improved.

Specifically, as shown in fig. 2 and fig. 3, the driving structure 9 includes two driving blocks 16 disposed on the lower die plate 2, two driving rods 17 obliquely disposed are fixedly connected to the upper die plate 1, the driving rods 17 are obliquely inserted into the driving blocks 16, and the driving blocks 16 are fixedly connected to the side insert blocks 3. The driving rod that can drive the slope setting when cope match-plate pattern vertical upward movement rises along vertical direction, and the vertical rising of the actuating rod of slope can drive the outside translation of drive block level, thereby the outside translation of drive block can drive the outside translation of side insert level and can make side insert and product separation.

Preferably, as shown in fig. 2 and 3, the lower template 2 is further provided with a limiting groove 18 adapted to the driving block 16, the driving block 16 is embedded into the limiting groove 18 and is slidably connected with the limiting groove 18, the lower template 2 is further provided with a limiting pressure plate 19, and the outer sides of the side insert 3 and the driving block 16 are provided with a vertical limiting portion 20 extending horizontally outwards to the bottom of the limiting pressure plate 19. The limiting groove can prevent the driving block from deviating during horizontal movement, and the limiting pressing plate is matched with the vertical limiting part to limit the driving block and the side insert in the vertical direction.

Specifically, the lower template 2 is further provided with an insert groove 21 which is recessed inwards, and when the two side inserts 3 are combined to form the head forming cavity 4, a sliding gap 22 is formed between the outer side wall of each side insert 3 and the side wall of the insert groove 21.

Preferably, the upper plate 1 is further provided with a retreat prevention structure inserted into the sliding gap 22. The anti-retreat structure comprises an anti-retreat plate 23 fixed on the upper template 1, when the upper template 1 and the lower template 2 are folded, the anti-retreat plate 23 is inserted into the sliding gap 22, and the inner end and the outer end of the anti-retreat plate 23 are respectively abutted against the outer side wall of the side insert 3 and the side wall of the insert groove 21. The anti-retreat plate on the upper die plate can be inserted into the sliding gap during die assembly, so that the side insert can be prevented from retreating due to overlarge cavity pressure.

The utility model discloses a theory of operation is: when the upper template is separated from the lower template, the two side inserts can be driven by the driving structure to move outwards so that the part, located at the head forming cavity, of the product is separated from the side inserts, the adhesion area of the product is reduced, after the side inserts move, the product is supported by the lower insert ejection mechanism, and then the part, located at the tail forming cavity, of the product is ejected and separated from the lower insert by the ejection mechanism, so that the probability of surface damage of the product can be greatly reduced, and the gas-assisted structure can inject high-pressure gas into the head forming cavity and the tail forming cavity during product injection molding so as to form a hollow cavity inside the product;

high-pressure gas can be introduced into the head forming cavity and the tail forming cavity through the first high-pressure gas inlet pipe and the second high-pressure gas inlet pipe, so that a hollow cavity is formed inside a product, and the injection molding pipe injects injection molding liquid into the head forming cavity through a small-caliber liquid injection needle on the injection molding block, so that the area of a pouring gate can be reduced, and the surface quality of the product can be improved;

the driving rod that can drive the slope setting when the cope match-plate pattern is vertical upward movement rises along vertical direction, the vertical rising of the actuating rod of slope can drive the outside translation of drive block level, thereby the outside translation of drive block can drive the outside translation of side insert level and can make the side insert and product separation, the spacing groove can prevent that the skew from appearing in the drive block when horizontal migration, the vertical spacing portion of spacing clamp plate cooperation can carry out the spacing of vertical direction to drive block and side insert, thereby prevent on the cope match-plate pattern can insert to the sliding gap in can prevent to press the too big side insert that leads to when the compound die and move back because of the chamber.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the upper die plate 1, the lower die plate 2, the side insert 3, the head forming cavity 4, the upper insert 5, the lower insert 6, the tail forming cavity 7, the gas-assisted structure 8, the driving structure 9, the air inlet pipe fixing plate 10, the first high-pressure air inlet pipe 11, the second high-pressure air inlet pipe 12, the injection pipe 13, the small-caliber injection needle 14, the injection block 15, the driving block 16, the driving rod 17, the limiting groove 18, the limiting pressing plate 19, the vertical limiting part 20, the insert groove 21, the sliding gap 22, the anti-backing plate 23, etc., are used herein more often, these terms are used only for more convenient description and explanation of the essence of the present invention; they are to be construed as being without limitation to any one of the additional limitations of the present invention.

Claims

1. The utility model provides an injection mold is assisted to polypropylene cavity gas, includes cope match-plate pattern (1) and lower bolster (2), its characterized in that, lower bolster (2) go up the symmetry and be provided with two sides that insert (3) in inserting cope match-plate pattern (1), two sides insert and have head shaping chamber (4) between (3), cope match-plate pattern (1) and lower bolster (2) on still be fixed with respectively insert (5) and insert (6) down between two sides insert (3), last insert (5) and insert down and have afterbody shaping chamber (7) that link to each other with head shaping chamber (4) between (6), afterbody shaping chamber (7) keep away from head shaping chamber (4) one side to the left and right sides branching, cope match-plate pattern (1) on still be equipped with gas that is used for forming the cavity in product inside and assist structure (8), cope match-plate pattern (1) and lower bolster (2) on still be equipped with drive structure (9) that can drive side insert (3) and follow the horizontal direction translation.

2. The polypropylene hollow air-assisted injection mold according to claim 1, wherein the air-assisted structure (8) comprises an air inlet pipe fixing plate (10) fixed on the upper mold plate (1), the air inlet pipe fixing plate (10) is provided with a first high-pressure air inlet pipe (11) with the bottom inserted into the head forming cavity (4), and the upper mold plate (1) is fixedly connected with a second high-pressure air inlet pipe (12).

3. The polypropylene hollow air-assisted injection mold according to claim 2, wherein the air inlet pipe fixing plate (10) is arranged on the side of the upper mold plate (1) far away from the upper insert (5).

4. The air-assisted injection mold for polypropylene according to claim 2, wherein the first high pressure inlet pipe (11) and the second high pressure inlet pipe (12) are respectively connected with the head forming cavity (4) at the head end and the tail end.

5. The polypropylene air-assisted injection mold according to claim 2, wherein the upper mold plate (1) is further fixedly connected with an injection molding pipe (13), and the bottom of the injection molding pipe (13) is connected with the head forming cavity (4) through an injection molding block (15) with a small-caliber injection needle (14).

6. The polypropylene air-assisted injection mold according to claim 2, wherein the driving structure (9) comprises two driving blocks (16) arranged on the lower mold plate (2), the upper mold plate (1) is fixedly connected with two driving rods (17) which are obliquely arranged, the driving rods (17) are obliquely inserted into the driving blocks (16), and the driving blocks (16) are fixedly connected with the side inserts (3).

7. The polypropylene air-assisted injection mold according to claim 6, wherein the lower mold plate (2) is further provided with a limiting groove (18) matched with the driving block (16), the driving block (16) is embedded into the limiting groove (18) and is in sliding connection with the limiting groove (18), the lower mold plate (2) is further provided with a limiting pressure plate (19), and the outer sides of the side insert blocks (3) and the driving block (16) are provided with vertical limiting parts (20) which horizontally extend outwards to the bottom of the limiting pressure plate (19).

8. The polypropylene hollow air-assisted injection mold according to claim 7, wherein the lower mold plate (2) is further provided with an inwardly recessed insert groove (21), and when the two side inserts (3) are combined to form the head forming cavity (4), a sliding gap (22) is formed between the outer side wall of the side insert (3) and the side wall of the insert groove (21).

9. The air-assisted injection mold for polypropylene according to claim 8, wherein the upper mold plate (1) is further provided with a back-off prevention structure inserted into the sliding gap (22).

10. The polypropylene hollow air-assisted injection mold according to claim 9, wherein the anti-back structure comprises an anti-back plate (23) fixed on the upper mold plate (1), when the upper mold plate (1) and the lower mold plate (2) are folded, the anti-back plate (23) is inserted into the sliding gap (22), and the inner end and the outer end of the anti-back plate (23) are respectively abutted against the outer side wall of the side insert (3) and the side wall of the insert groove (21).