CN218399296U

CN218399296U - Plastic barrel cover injection mold demoulding mechanism with easily-torn piece

Info

Publication number: CN218399296U
Application number: CN202222572684.5U
Authority: CN
Inventors: 谷祖兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-01-31
Anticipated expiration: 2032-09-28

Abstract

The demoulding mechanism comprises an upper compound plate and a lower compound plate, wherein a cavity is arranged below the upper compound plate, a fixed plate is arranged on the lower compound plate, an oil cylinder is arranged on one side of the fixed plate, a core and a stripper plate are arranged on the fixed plate, a core insert is arranged on the core, a connecting block is arranged on the side wall of the stripper plate, a pouring gate is arranged in the lower compound plate, the fixed plate, the core and the core insert, the cavity insert, the core insert and the stripper plate form a die cavity, a plastic barrel cover is arranged in the die cavity, a convex rib is arranged below the plastic barrel cover, a flanging is arranged around the plastic barrel cover, a barb is arranged on the inner wall of the flanging, an easy-tearing piece is arranged on one side of the flanging, a guide rail is arranged on the stripper plate, a side core-pulling slide block is arranged on the guide rail, the side core-pulling slide block is matched with the easy-tearing piece, a limit pull nail is arranged on the outer wall of the stripper plate, one end of the limit pull nail penetrates through the stripper plate and is fixedly connected with the side core-pulling slide block, a convex ring is arranged between the convex ring and the stripper plate.

Description

Plastic barrel cover injection mold demoulding mechanism with easily-torn piece

Technical Field

The utility model relates to an injection mold especially relates to plastics bung injection mold demoulding mechanism with easily tear piece.

Background

Adopt injection mold to produce general lid of plastics, easily open the lid, if the system has protruding muscle below the lid, the turn-ups inner wall system of lid has the barb, and system has easily torn piece structure on one side turn-ups wherein, prior art sets up the runner in die cavity one side usually, the runner is located the front of product, when product injection moulding, the runner trace can be left in the front of product, influence the product appearance pleasing to the eye, and when the product drawing of patterns, generally adopt the hydro-cylinder to drive the side slider and take out the easy piece structure that tears on the product lateral wall earlier, rethread another group hydro-cylinder drives and takes off the flitch, it takes off the flitch with the ejecting drawing of patterns of product to take off the flitch, multiunit hydro-cylinder structure is complicated, and directly ejecting the product through taking off the flitch, because product area is great, it takes place the adhesion with the core below it easily, lead to unable smooth drawing of patterns, thereby influence the yield of product.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art exists, provide a front of bung does not have the runner trace, guarantees that the appearance is pleasing to the eye, and the drawing of patterns is smooth, simple structure, the plastics bung injection mold demoulding mechanism that has of reduction in manufacturing cost easily tears the piece.

The utility model discloses plastics bung injection mold demoulding mechanism with easily tear piece's technical scheme is: the injection molding type core pulling device comprises an upper compound plate and a lower compound plate, wherein a cavity is arranged below the upper compound plate, a cavity insert is arranged below the cavity, a sprue bush is arranged in the lower compound plate, a fixed plate is arranged on the lower compound plate, an oil cylinder is arranged on one side of the fixed plate, a core and a stripper plate are arranged on the fixed plate, the core insert is arranged on the core, a connecting block is arranged on the side wall of the stripper plate and is fixedly connected with a piston rod of the oil cylinder, a sprue is arranged in the lower compound plate, the fixed plate, the core and the core insert, the cavity insert, the core insert and the stripper plate form a mold cavity, an injection molding plastic barrel cover is arranged in the mold cavity, a downward convex rib is arranged below the plastic barrel cover, a downward flange is arranged on the periphery of the plastic barrel cover, a barb is arranged on the inner wall of the flange, an easy-tearing piece is arranged on one side of the stripper plate, a side core pulling slider is arranged on the guide rail, one end of the side pulling slider is matched with the easy-tearing piece on the side barrel cover side, an inclined guide surface is arranged on the other side of the side pulling slider, an inclined guide surface, a convex locking block is arranged on the outer wall of the cavity, a limiting pin is arranged between the side pulling slider and is connected with a limiting ring, and a limiting pin is arranged between the stripper plate.

The utility model discloses a plastics bung injection mold demoulding mechanism with easily tear piece, after plastics bung injection moulding, the mould is from die cavity and core department die sinking, the plastics bung stays on the core, in the mould die sinking, the latch segment under the die cavity breaks away from the contact with the inclined guide surface of the side slider of loosing core, the spring promotes spacing blind rivet outwards to remove under the effect of restoring force, spacing blind rivet drives the side slider of loosing core and outwards slides along the guide rail, make the side slider of loosing core take out the easy piece of tearing of plastics bung lateral wall, meanwhile, the piston rod of hydro-cylinder promotes the connecting block rebound, the connecting block drives takes off flitch rebound, it drives plastics bung rebound to take off the flitch, make the barb of plastics bung deviate from core and core insert, and fall into the containing box downwards, and after accomplishing the drawing of patterns, the mould closing resets gradually, the hydro-cylinder drives the flitch and resets, the locking inclined plane of the latch segment under the die cavity cooperates with the inclined plane of the side slider of loosing core, the elasticity that the spring was overcome to the side slider resets inwards, it moulds plastics to prepare for one time down. According to the plastic barrel cover injection mold demolding mechanism with the easily-torn piece, the pouring gate is arranged on one side of the mold core, and glue enters from the back of a product, so that pouring gate marks on the front of the product are avoided, and the attractive appearance of the surface of the product is ensured; 2. the easy-to-tear sheet structure for driving the side core-pulling sliding block to be pulled out of the plastic barrel cover by adopting the limiting rivet and spring structure has the advantages of simple structure, convenience in manufacturing, reduction in development cost of the die and capability of ensuring smooth demolding of the die.

The utility model discloses plastics bung injection mold demoulding mechanism with easily tear piece, fixed plate, core and core insert the well system and have the inlet port, the air pump is connected to one end of inlet port, is located the inlet port that the core inserted and sets up special valve, special valve cooperatees bottom the plastic drum lid. After the mold is opened, when a piston rod of the oil cylinder drives the connecting block and the stripper plate to move upwards, the air pump blows high-pressure air into the air inlet hole, and blows in a special air valve through the air inlet hole.

Drawings

Fig. 1 is a schematic structural view of the demoulding mechanism of the plastic barrel cover injection mould with the easy-to-tear piece of the utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a perspective view of the lower compound plate, the fixing plate, the stripper plate, the core insert, the oil cylinder, the connecting block, the side core-pulling slide block, the spring and the limit blind rivet in a matching state.

Detailed Description

The utility model relates to a demoulding mechanism of an injection mould of a plastic barrel cover with an easily torn piece, as shown in figures 1-3, comprising an upper compound plate 1 and a lower compound plate 2, a cavity 3 is arranged under the upper compound plate, a cavity insert 4 is arranged under the cavity, a sprue bush 5 is arranged in the lower compound plate 2, a fixed plate 6 is arranged on the lower compound plate, an oil cylinder 7 is arranged on one side of the fixed plate, a core 8 and a stripper plate 9 are arranged on the fixed plate, a core insert 10 is arranged on the core, a connecting block 11 is arranged on the side wall of the stripper plate 9, the connecting block is fixedly connected with a piston rod of the oil cylinder, a sprue 12 is arranged in the lower compound plate 2, the fixed plate 6, the core 8 and the core insert 10, a die cavity is formed by the cavity insert 4, the core 8, the core insert 10 and the stripper plate 9, and an injection moulding plastic barrel cover 13 is arranged in the die cavity, a downward convex rib 14 is arranged below the plastic barrel cover, a downward flanging 15 is arranged around the plastic barrel cover, a barb 16 is arranged on the inner wall of the flanging, an easy-to-tear piece 17 is arranged on one side of the flanging, a guide rail 18 is arranged on the stripping plate 9, a side core-pulling slider 19 is arranged on the guide rail, one end of the side core-pulling slider is matched with the easy-to-tear piece 17 on the side wall of the plastic barrel cover 13, an inclined guide surface 20 is arranged on the other side of the side core-pulling slider, a convex locking block 21 is arranged below the cavity 3, an inclined locking surface is arranged on the inner wall of the locking block and matched with the inclined guide surface 20, a limiting rivet 23 is arranged on the outer wall of the stripping plate 9, one end of the limiting rivet penetrates through the stripping plate to be fixedly connected with the side core-pulling slider 19, a convex ring 24 is arranged on the other end of the limiting rivet, and a spring 25 is arranged between the convex ring and the stripping plate 9. After the plastic barrel cover 13 is injection molded, the mold is opened from the cavity 3 and the core 8, the plastic barrel cover is left on the core, while the mold is opened, the locking block 21 below the cavity 3 is separated from the inclined guide surface 20 of the side core-pulling slide block 19, the spring 25 pushes the limiting pull nail 23 to move outwards under the action of restoring force, the limiting pull nail drives the side core-pulling slide block 19 to slide outwards along the guide rail 18, so that the side core-pulling slide block pulls out the easy-tearing piece 17 on the side wall of the plastic barrel cover 13, meanwhile, the piston rod of the oil cylinder 7 pushes the connecting block 11 to move upwards, the connecting block drives the stripper plate 9 to move upwards, the stripper plate drives the plastic barrel cover 13 to move upwards, the barb 16 of the plastic barrel cover is stripped from the core 8 and the core insert 10 and falls downwards into the containing box, after demolding is completed, the mold closing mold is gradually reset, the oil cylinder drives the stripper plate 9 to reset, the locking inclined surface of the locking block 21 below the cavity 3 is matched with the inclined guide surface 20 of the inclined guide surface of the side core-pulling slide block 19, the side slide block is pushed to reset inwards to overcome the elasticity of the spring 25, and prepare for next injection molding. According to the plastic barrel cover injection mold demolding mechanism with the easily-torn piece, the pouring gate 12 is arranged on one side of the mold core 8, glue enters from the back of a product, pouring gate marks on the front of the product are avoided, and the attractive appearance of the surface of the product is guaranteed; 2. the structure of the easy-to-tear piece 17 for drawing the side core-pulling sliding block 19 out of the plastic barrel cover 13 is driven by the limiting pull nails 23 and the spring 25, the structure is simple, the manufacturing is convenient, the development cost of the die is reduced, and the smooth demolding of the die is ensured. An air inlet 26 is formed in the fixing plate 6, the core 8 and the core insert 10, one end of the air inlet is connected with an air pump, a special air valve 27 is arranged in the air inlet of the core insert 10, and the special air valve is matched with the bottom of the plastic barrel cover 13. After the mold is opened, when a piston rod of the oil cylinder 7 drives the connecting block 11 and the stripper plate 9 to move upwards, the air pump blows high-pressure air into the air inlet 26 and blows in the special air valve 27 through the air inlet 26, and when the stripper plate drives the injection-molded plastic barrel cover 13 to be demolded upwards, the air blowing hole is utilized to assist the plastic barrel cover 13 to be demolded, so that the bottom of the plastic barrel cover and the core insert 10 are prevented from being adhered to each other, and the plastic barrel cover can be smoothly demolded.

Claims

1. Plastics bung injection mold demoulding mechanism with easily tear piece, its characterized in that: the core pulling device comprises an upper compound plate (1) and a lower compound plate (2), wherein a cavity (3) is arranged below the upper compound plate, a cavity insert (4) is arranged below the cavity, a sprue bush (5) is arranged in the lower compound plate (2), a fixing plate (6) is arranged on the lower compound plate, an oil cylinder (7) is arranged on one side of the fixing plate, a core (8) and a core-pulling plate (9) are arranged on the fixing plate, a core insert (10) is arranged on the core, a connecting block (11) is arranged on the side wall of the core-pulling plate (9), the connecting block is fixedly connected with a piston rod of the oil cylinder, gates (12) are arranged in the lower compound plate (2), the fixing plate (6), the core (8) and the core (10), the cavity (3), the cavity insert (4), the core (8), the core insert (10) and the core-pulling plate (9) form a cavity, an injection-molded plastic barrel cover (13) is arranged in the cavity, a downward insert (14) is arranged below the plastic barrel cover, a downward convex rib (15) is arranged around the plastic barrel cover, a barb (16) is arranged on the inner wall of the plastic barrel cover, a flanging is provided with a pliable sheet (17) on one side, a flanging guide rail (9), a side guide rail (18) is arranged on the flanging guide rail, a side wall of the barrel cover (19) is arranged on the side of the barrel cover, and a side wall of the barrel cover (17) matched with a side guide block (17), and a side wall of the core pulling slider (19) matched with a side tearing slider (17) on the other side of the core pulling slider, and a side of the core pulling slider (17) of the core pulling slider, a convex locking block (21) is arranged below a cavity (3), an inclined locking surface is arranged on the inner wall of the locking block, the inclined locking surface is matched with an inclined guide surface (20), a limiting pull nail (23) is arranged on the outer wall of a stripping plate (9), one end of the limiting pull nail penetrates through the stripping plate and is fixedly connected with a side core-pulling slider (19), a convex ring (24) is arranged on the other end of the limiting pull nail, and a spring (25) is arranged between the convex ring and the stripping plate (9).

2. The plastic barrel cover injection mold demolding mechanism with the easy-to-tear sheet as claimed in claim 1, wherein: an air inlet (26) is formed in the fixing plate (6), the core (8) and the core insert (10), one end of the air inlet is connected with an air pump, a special air valve (27) is arranged in the air inlet of the core insert (10), and the special air valve is matched with the bottom of the plastic barrel cover (13).