CN210634061U - Vacuum deformation prevention injection molding mechanism - Google Patents

Abstract

The utility model relates to the technical field of battery shell forming, in particular to an anti-vacuum deformation injection molding mechanism, wherein the front end surface of a mold core is provided with a push block positioning hole; the push block positioning hole is embedded into the push block positioning hole; the rear end face of the mold core is provided with two guide holes and an exhaust hole; ejector rods are arranged in the guide holes; the ejector rod penetrates through the guide hole and then is fixedly connected with the push block; an air tap is fixed in the inner cavity of the exhaust hole; one end surface of the push block connected with the ejector rod is in a hemispherical shape. Use the utility model discloses the time, this structure except can preventing that plastic housing from producing deformation in the drawing of patterns, can make drawing of patterns working of plastics not fully cool off moreover, vacuum adsorption and production warp when still can not drawing of patterns, the air current does not directly concentrate the impact to the working of plastics, can the plastics drawing of patterns under higher temperature, reduces plastic housing's cooling time, improves plastic housing's production efficiency.

Description

Vacuum deformation prevention injection molding mechanism

Technical Field

The utility model relates to a battery case shaping technical field, in particular to prevent vacuum deformation mechanism of moulding plastics.

Background

In the injection molding process of the battery shell type product, after injection molding and cooling shrinkage, the plastic shell product is generally wrapped on the mold core, and after the movable mold is separated from the fixed mold, the battery shell can still be wrapped and fixed on the mold core; at the moment, a pushing mechanism on the male die is needed to push the battery shell out of the core; when the battery shell is pushed out, the volume of a cavity enclosed between the inner cavity of the battery shell and the front end face of the core is increased; but the gaps between the inner wall of the plastic shell and the mold core are less, so the air inlet speed of the cavity is slow, the air pressure of the cavity is far lower than the atmospheric pressure, the side wall of the cavity is pressed inwards by the atmospheric pressure, and the side wall of the battery shell has certain plastic deformation capacity due to the demolding temperature after the battery shell is molded, so the battery shell is pressed inwards and deformed by the atmospheric pressure, and the battery shell is deformed to be permanently sunken inwards; not only the appearance of the battery case but also the assembly size is affected.

Therefore, when the battery shell is formed, the core is provided with the air nozzle, and when the battery shell is demolded, air is injected into the cavity through the air nozzle, so that the air pressure inside the cavity is equal to the atmospheric pressure, and the formed side face of the battery shell is not deformed. But the air is supplemented through the air nozzle; on one hand, the air faucet is easy to block, and on the other hand, the strong impact force of the air faucet is allowed to enable the air faucet to generate larger impact force to the position of the battery shell to deform, so that the plastic shell can be demoulded only by being fully cooled, and the injection molding efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent vacuum deformation mechanism of moulding plastics to prior art's defect and not enough.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model relates to an anti-vacuum deformation injection molding mechanism, which comprises a mold core and a push block; the front end surface of the mold core is provided with a push block positioning hole; the push block is matched with the push block positioning hole; the push block positioning hole is embedded into the push block positioning hole;

the rear end face of the mold core is provided with two guide holes and an exhaust hole; the guide hole and the exhaust hole penetrate through the push block positioning hole; ejector rods are arranged in the guide holes; the rod body of the ejector rod is matched with the guide hole; the ejector rod penetrates through the guide hole and then is fixedly connected with the push block; an air tap is fixed in the inner cavity of the exhaust hole; the exhaust hole is arranged between the two guide holes; one end surface of the push block connected with the ejector rod is in a hemispherical shape.

Further, an external thread is arranged on the outer side wall of the air tap; the inner cavity of the exhaust hole is provided with an internal thread matched with the external thread; the external thread is in threaded connection with the internal thread.

Further, an air distributing piece is fixed on the back of the pushing block; the gas distribution piece and the exhaust hole are coaxially arranged; the gas distribution piece consists of a plurality of baffles; the baffles are circumferentially distributed in the exhaust holes.

After the structure is adopted, the utility model discloses beneficial effect does: the utility model relates to an anti-vacuum deformation injection molding mechanism, the front end surface of a mold core is provided with a push block positioning hole; the push block is matched with the push block positioning hole; the push block positioning hole is embedded into the push block positioning hole; the rear end face of the mold core is provided with two guide holes and an exhaust hole; the guide hole and the exhaust hole penetrate through the positioning hole of the push block; ejector rods are arranged in the guide holes; the rod body of the ejector rod is matched with the guide hole; the ejector rod penetrates through the guide hole and then is fixedly connected with the push block; an air tap is fixed in the inner cavity of the exhaust hole; the exhaust hole is arranged between the two guide holes; one end surface of the push block connected with the ejector rod is in a hemispherical shape. When the utility model is used, the ejector rod is connected to the ejector rod, in the demoulding process, the ejector rod drives the back to be separated from the positioning hole of the ejector block and move forward to extract the plastic shell from the mould core, meanwhile, the air tap is communicated with the external air circuit and starts to exhaust in the exhaust hole, the gas in the exhaust hole is discharged through the gap between the ejector block and the positioning hole of the ejector block, and the gas discharged from the exhaust hole is reduced through the surface of the ejector block in the shape of a semispherical surface and is impacted and dispersed to all directions, and is finally filled into the battery shell, so that the battery shell can not deform even if the battery shell has certain plastic deformation capacity in the demoulding process; the push block prevents the direct impact of the airflow on the plastic part, and the impact of the gas on the battery shell is reduced; this structure except can preventing that plastic housing from producing deformation in the drawing of patterns, can make the drawing of patterns working of plastics not in addition fully cool off, vacuum adsorption and production warp when still can not drawing of patterns, the air current does not directly concentrate the impact to the working of plastics, can the plastics drawing of patterns under higher temperature, reduces plastic housing's cooling time, improves plastic housing's production efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the air distributing member fixed on the pushing block;

description of reference numerals:

1. a mold core; 101. a guide hole; 102. an exhaust hole; 102a, internal threads;

103. positioning holes of the push block; 2. a top rod; 3. a push block; 4. a gas distribution member; 5. an air tap;

501. and (4) external threads.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 2, the vacuum deformation prevention injection molding mechanism of the present invention comprises a mold core 1 and a push block 3; a push block positioning hole 103 is formed in the front end face of the mold core 1; the push block 3 is matched with the push block positioning hole 103; the push block positioning hole 103 is embedded into the push block positioning hole 103;

the rear end face of the mold core 1 is provided with two guide holes 101 and an exhaust hole 102; the guide hole 101 and the exhaust hole 102 penetrate through the push block positioning hole 103; ejector rods 2 are arranged in the guide holes 101; the rod body of the ejector rod 2 is matched with the guide hole 101; the ejector rod 2 penetrates through the guide hole 101 and then is fixedly connected with the push block 3; an air tap 5 is fixed in the inner cavity of the exhaust hole 102; the exhaust hole 102 is disposed between the two guide holes 101; one end surface of the push block 3 connected with the ejector rod 2 is in a hemispherical shape; the ejector rod 2 is connected to the ejector rod 2, in the demolding process, the ejector rod 2 is driven to separate from the ejector block positioning hole 103 through the ejector block 3 and move forwards to pull out the plastic shell from the mold core 1, meanwhile, the air nozzle 5 starts to exhaust air in the exhaust hole 102 through an external air path, the air in the exhaust hole 102 is exhausted through a gap between the ejector block 3 and the ejector block positioning hole 103, the air exhausted from the exhaust hole 102 is reduced and impacted and dispersed to all directions through the surface of the ejector block 3 in the semispherical shape, and finally the air is filled into the battery shell, so that the battery shell cannot deform even if the battery shell has certain plastic deformation capacity in the demolding process; moreover, the push block 3 prevents the direct impact of the airflow on the plastic part, and reduces the impact of the gas on the battery shell; this structure except can preventing that plastic housing from producing deformation in the drawing of patterns, can make the drawing of patterns working of plastics not in addition fully cool off, vacuum adsorption and production warp when still can not drawing of patterns, the air current does not directly concentrate the impact to the working of plastics, can the plastics drawing of patterns under higher temperature, reduces plastic housing's cooling time, improves plastic housing's production efficiency.

As a preferable mode of the present invention, the outer side wall of the air faucet 5 is provided with an external thread 501; the inner cavity of the exhaust hole 102 is provided with an internal thread 102a matched with the external thread 501; the external thread 501 is in threaded connection with the internal thread 102 a; the air tap 5 is connected in the exhaust hole 102 through threads, and is convenient to disassemble and assemble.

As a preferred mode of the utility model, an air distributing piece 4 is fixed on the back of the pushing block 3; the gas distribution piece 4 and the exhaust hole 102 are coaxially arranged; the gas distribution piece 4 consists of a plurality of baffle plates; the baffles are circumferentially distributed in the exhaust holes 102; the gas distributing piece 4 has the effects that the gas in the exhaust hole 102 is divided into a plurality of strands of fluid by the baffle plate, the fluid flows out along different directions on the push block 3 in the shape of the hemispherical surface, the phenomenon that the gas is intensively blown to one side of the plastic shell of the battery due to the fact that the gas flow deviates to one side after the air tap 5 is not concentric is avoided, the uniformity of the gas filled in the plastic shell is improved, and the impact of the plastic shell of the battery is reduced.

When the utility model is used, the ejector rod is connected on the ejector rod, in the demoulding process, the ejector rod is driven to separate from the positioning hole of the push block and move forwards to extract the plastic shell from the mould core, meanwhile, the air nozzle starts to exhaust air in the exhaust hole through an air path communicated with the outside, the air in the exhaust hole is exhausted through a gap between the push block and the push block positioning hole, and the gas exhausted from the exhaust hole is dispersed in all directions by reducing the impact of the surface of the push block in the semi-spherical shape, the gas distributing part formed by adding baffle plates in the exhaust holes utilizes the baffle plates to divide the gas in the exhaust holes into a plurality of strands of fluid, the gas flows out of the push block in the hemispherical shape along different directions, so that the phenomenon that the gas is concentrated to blow a certain side of the plastic shell of the battery due to the fact that the gas flow deviates to the certain side after the gas nozzles are not concentric is avoided, the uniformity of the gas filled in the plastic shell is improved, and the impact of the plastic shell of the battery is reduced; finally, the material is filled into the battery shell, so that the battery shell is ensured not to deform even if the battery shell has certain plastic deformation capacity in the demolding process; the push block prevents the direct impact of the airflow on the plastic part, and the impact of the gas on the battery shell is reduced; this structure except can preventing that plastic housing from producing deformation in the drawing of patterns, can make the drawing of patterns working of plastics not in addition fully cool off, vacuum adsorption and production warp when still can not drawing of patterns, the air current does not directly concentrate the impact to the working of plastics, can the plastics drawing of patterns under higher temperature, reduces plastic housing's cooling time, improves plastic housing's production efficiency.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims (3)

1. The utility model provides a prevent vacuum deformation mechanism of moulding plastics which characterized in that: the device comprises a mould core (1) and a push block (3); a push block positioning hole (103) is formed in the front end face of the mold core (1); the push block (3) is matched with the push block positioning hole (103); the push block positioning hole (103) is embedded into the push block positioning hole (103);

the rear end face of the mould core (1) is provided with two guide holes (101) and an exhaust hole (102); the guide hole (101) and the exhaust hole (102) penetrate through the push block positioning hole (103); ejector rods (2) are arranged in the guide holes (101); the rod body of the ejector rod (2) is matched with the guide hole (101); the ejector rod (2) penetrates through the guide hole (101) and then is fixedly connected with the push block (3); an air tap (5) is fixed in the inner cavity of the exhaust hole (102); the exhaust hole (102) is arranged between the two guide holes (101); one end surface of the push block (3) connected with the ejector rod (2) is in a hemispherical shape.

2. The vacuum deformation prevention injection molding mechanism according to claim 1, characterized in that: the outer side wall of the air tap (5) is provided with an external thread (501); the inner cavity of the exhaust hole (102) is provided with an internal thread (102 a) matched with the external thread (501); the external thread (501) is in threaded connection with the internal thread (102 a).

3. The vacuum deformation prevention injection molding mechanism according to claim 1, characterized in that: the back of the push block (3) is fixed with an air distributing piece (4); the gas distribution piece (4) and the exhaust hole (102) are coaxially arranged; the gas distribution piece (4) consists of a plurality of baffles; the baffles are circumferentially distributed in the exhaust holes (102).

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