CN216760671U

CN216760671U - Hot runner front mould spring secondary ejection structure

Info

Publication number: CN216760671U
Application number: CN202220215011.1U
Authority: CN
Inventors: 黄坤; 侯晨
Original assignee: YANGZHOU HENGSHENG PRECISION MOLD CO Ltd
Current assignee: YANGZHOU HENGSHENG PRECISION MOLD CO Ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-06-17
Anticipated expiration: 2032-01-26

Abstract

Hot runner front mould spring secondary ejecting structure. The hot runner front mold spring secondary ejection structure is simple in structure and convenient to demold. The spring A, the reverse top plate and the die core are sequentially arranged in the accommodating holes from top to bottom, the spring A contacts the reverse top plate, the reverse top plate is movably positioned in the accommodating holes, and the die core is fixedly arranged in the accommodating holes; the middle of the die core is provided with a first through hole, and the insert is positioned in the first through hole and connected with the reverse top plate; the bottom of inserting is used for forming the die cavity of back-off between the bottom of mould benevolence and the bottom of inserting, the bottom surface of mould benevolence is equipped with the arrangement hole, the bullet piece passes through spring B swing joint and in the arrangement hole of mould benevolence. The utility model has convenient processing and reliable operation.

Description

Hot runner front mould spring secondary ejection structure

Technical Field

The utility model relates to a cover-turning die of a wet tissue barrel, in particular to a hot runner front die spring secondary ejection structure.

Background

The wet tissue packaging mode is to cater to the use habit and the use feeling of consumers and mainly comprises a bag and a barrel. The barreled wet tissue barrel cover comprises a barrel body and a barrel cover, wherein the barrel body and the barrel cover are used for containing wet tissue, and in the process of processing a wet tissue barrel cover die, the buckling mode that some covers are turned over is realized by a circle of inversed buckles on the matching surface.

When wet piece of cloth bucket flip lock department is the round back-off, the secondary ejecting of front mould is realized to the structure that adopts the three board moulds of cold runner usually, but the mouth of a river defective material of cold runner mould is more, and cost can increase when mass production, consequently, need adopt the hot runner to advance to glue and reduce manufacturing cost.

However, the front mold structure of the hot runner mold is greatly different from the front mold of the three-plate mold, and due to the limitation of the hot runner structure, the phenomenon of sticking the front mold exists when the front mold is reversely buckled in the demolding process, so that the front mold cannot be smoothly separated from the cavity, and the product quality is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides the hot runner front mold spring secondary ejection structure which is simple in structure and convenient to demold.

The technical scheme of the utility model is as follows: comprises a panel, a flow distribution plate and an A plate which are arranged from top to bottom in sequence, and also comprises a reverse top plate, a mold core, an insert, an elastic block, a spring A and a spring B,

the spring A contacts the reverse top plate, the reverse top plate is movably positioned in the accommodating hole, and the die core is fixedly arranged in the accommodating hole;

the middle of the die core is provided with a first through hole, and the insert is positioned in the first through hole and connected with the reverse top plate;

a reversed cavity is formed between the bottom of the insert and the bottom of the die core,

the bottom surface of the die core is provided with a placing hole, and the elastic block is movably connected in the placing hole of the die core through a spring B.

The anti-ejection plate is provided with a large stepped groove and a small stepped groove, the stepped groove is communicated with the placing hole, the head of the limiting screw is arranged in the large stepped hole of the stepped groove, and the rod part of the limiting screw is positioned in the small stepped hole of the stepped groove and extends into the placing hole to be connected with the elastic block;

and the spring B is sleeved at the rod part of the limiting screw.

And a second through hole is formed in the middle of the elastic block, and the insert is positioned in the second through hole.

The spring A comprises at least two springs.

When the front die and the rear die are used for parting, the spring A starts to release elasticity in the plate A of the front die, the reverse top plate, the insert and the elastic block are pushed downwards together, the reverse top plate is attached to the die core at the moment, and the reverse top plate and the insert stop moving.

Then, the spring B continuously releases the elasticity, the flip cover with the back buckle is demoulded, the product is completely separated from the front mould and is left in the rear mould, and the action is smoothly finished.

The utility model has convenient processing and reliable operation.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

figure 2 is a partial schematic view of the closed mold state of figure 1,

figure 3 is a first schematic diagram of the action of figure 2,

figure 4 is a second schematic diagram of the action of figure 2,

figure 5 is a schematic view of the structure of the bullet block,

figure 6 is a top view of figure 5,

figure 7 is a schematic view of the construction of the lid,

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

in the figure, 1 is a panel, 2 is a flow distribution plate, 3 is an A plate, 4 is a reverse top plate, 5 is a mold core, 6 is an insert, 7 is an elastic block, 8 is a spring A, 9 is a spring B, 10 is a containing hole, 11 is a displacement gap, 12 is a first through hole, 13 is a placing hole, 14 is a limiting screw, 15 is a stepped groove, 16 is a second through hole, 17 is a turnover cover, and 18 is a reverse buckle.

Detailed Description

The utility model is shown in figures 1-8, comprises a panel 1, a splitter plate 2 and an A plate 3 which are arranged from top to bottom in sequence, and also comprises a reverse top plate 4, a mold core 5, an insert 6, an elastic block 7, a spring A8 and a spring B9,

the mould comprises a plate A3, a spring A8, a reverse top plate 4, a mould core 5, a displacement gap 11 and a spring A8, wherein the plate A3 is internally provided with the containing hole 10, the spring A8, the reverse top plate 4 and the mould core 5 are sequentially arranged in the containing hole from top to bottom, the spring A8 is contacted with the reverse top plate 4, the reverse top plate is movably arranged in the containing hole, the mould core is fixedly arranged in the containing hole, and when the mould is closed, the reverse top plate and the mould core have the displacement gap 11;

a first through hole 12 is formed in the middle of the die core, and the insert 6 is positioned in the first through hole and connected with the reverse top plate 4;

a cavity for forming the back-off 18 is formed between the bottom of the insert 6 and the bottom of the die core 5,

the bottom surface of the die core is provided with a placing hole 13, and the elastic block is movably connected in the placing hole of the die core through a spring B. When the mould is closed for forming, the elastic block and the mould core are used for forming the turnover cover.

The reverse top plate is fixedly connected with the insert, and the elastic block is connected with the reverse top plate through a limiting screw and has a certain moving distance. The elasticity of the spring A is far greater than that of the spring B, and when the spring A releases to push the counter top plate to move for 3mm, the spring B also synchronously releases to push the elastic block to move downwards for 3 mm; in the process, the reverse top plate, the insert and the elastic block move synchronously.

Then, the spring B continuously releases the elasticity, the flip cover with the back buckle is demoulded, the product is completely separated from the front mould and is left in the rear mould, and the action is smoothly finished. The accommodating holes can be arranged according to specific installation requirements, such as stepped holes, so that the spring A, the reverse top plate and the die core can be conveniently arranged, and different installation requirements can be met.

The anti-ejection device is characterized by further comprising a limiting screw 14, wherein a stepped groove 15 with a large upper part and a small lower part is formed in the anti-ejection plate 4, the stepped groove is communicated with the placement hole, the head part of the limiting screw 14 is arranged in the large stepped hole of the stepped groove, and the rod part of the limiting screw is located in the small stepped hole of the stepped groove and extends into the placement hole to be connected with the elastic block 7;

and the spring B is sleeved at the rod part of the limiting screw.

Through setting up spacing screw, be convenient for reliably connect the bullet piece, the stroke of restriction bullet piece, it is convenient and reliable.

And a second through hole 16 is formed in the middle of the elastic block, and the insert block is positioned in the second through hole.

Thus, the elastic block is convenient to contact the periphery of the turnover cover 17, and the demoulding reliability is improved. In fig. 5, two through holes are provided to facilitate the simultaneous processing of two covers.

The spring A8 includes at least two.

The setting can be selected according to the working conditions.

The processing process of the utility model is as follows:

as shown in fig. 2, the product undercut is completely within the mold cavity;

as shown in fig. 3, the reverse top plate, the insert and the elastic block move downwards simultaneously, and the product is reversely attached to the insert and moves together to be separated from the cavity;

as shown in fig. 4, the elastic block is pushed downwards, and the product is reversely buckled and demoulded.

When the front die product is reversely buckled for one circle, in order to prevent the product from sticking to the front die and ensure that the reverse buckle can be smoothly separated from the cavity, the spring is adopted to push the reverse top plate to perform secondary ejection action.

The disclosure of the present application also includes the following points:

(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;

(2) in case of conflict, the embodiments and features of the embodiments disclosed in this application can be combined with each other to arrive at new embodiments;

the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.

Claims

1. The hot runner front mold spring secondary ejection structure comprises a panel, a flow distribution plate and an A plate which are sequentially arranged from top to bottom, and is characterized by further comprising a reverse top plate, a mold core, an insert, an elastic block, a spring A and a spring B,

2. The hot runner front mold spring secondary ejection structure according to claim 1, further comprising a limit screw, wherein the reverse top plate is provided with a stepped groove with a large top and a small bottom, the stepped groove is communicated with the placement hole, the head of the limit screw is disposed in the large stepped hole of the stepped groove, and the rod of the limit screw is located in the small stepped hole of the stepped groove and extends into the placement hole to be connected with the spring block;

and the spring B is sleeved at the rod part of the limiting screw.

3. The hot runner front mold spring secondary ejection structure according to claim 1 or 2, wherein a second through hole is formed in the middle of the spring block, and the insert is located in the second through hole.

4. The hot runner anterior mold spring secondary ejection structure according to claim 1, wherein the spring a comprises at least two.