CN224116633U

CN224116633U - Ejection mechanism and die with ejection mechanism

Info

Publication number: CN224116633U
Application number: CN202520634632.7U
Authority: CN
Inventors: 陈会甫; 伊丁香; 汪克道
Original assignee: Ningbo Nanpu Electromechanical Co ltd
Current assignee: Ningbo Nanpu Electromechanical Co ltd
Priority date: 2025-04-03
Filing date: 2025-04-03
Publication date: 2026-04-14
Anticipated expiration: 2035-04-03

Abstract

This utility model provides an ejection mechanism and a mold with an ejection mechanism, belonging to the field of mold technology. It includes: a push plate; an ejector pin, one end of which is connected to the push plate, and the other end of the ejector pin has a first connecting part; and a nylon head, which has a second connecting part, connected to the first connecting part of the ejector pin via the second connecting part. The advantages of this utility model are: by using a nylon head, which is softer than the ejector pin, to directly contact the product, and through partial inlay, the contact between the nylon head and the product is plastic-to-plastic contact, protecting the hard plastic product placed inside for secondary injection molding, eliminating the risk of steel scraping the plastic. Furthermore, processing and assembly can be easily achieved by a fitter using a simple lathe, making it simple and convenient.

Description

Ejection mechanism and die with ejection mechanism

Technical Field

The utility model belongs to the technical field of molds, and relates to an ejection mechanism and a mold with the ejection mechanism.

Background

The injection mold is a mold used in the injection molding process for shaping molten plastic into a specific size and shape. In the production of encapsulated plastic articles, the ejector components in the mold can directly affect the appearance and reject ratio of the article.

The ejector pin of ejector components in traditional dies is generally in direct contact with products through a hard metal head, cannot protect the hard rubber products which are placed in secondary injection molding, and because the ejection pressure is too high, the ejector pin is easy to eject the products, the risks of steel shovel plastics are caused, the appearance and the reject ratio of the products are seriously affected, and a large improvement space is provided.

Disclosure of utility model

The utility model aims to solve the problems in the prior art and provides an ejection mechanism and a die with the ejection mechanism.

The utility model aims at realizing the technical scheme that the ejection mechanism comprises:

A push plate;

One end of the ejector pin is connected with the push plate, and the other end of the ejector pin is provided with a first connecting part;

The nylon head is connected with the first connecting part of the thimble through the second connecting part.

In the above ejection mechanism, the nylon head is detachably connected with the first connecting portion of the ejector pin through the second connecting portion.

In the above ejection mechanism, the first connecting portion is a positioning protrusion, the second connecting portion is a positioning recess with a shape matching the shape of the positioning protrusion, and the positioning protrusion is inserted into the positioning recess.

In the above ejection mechanism, the second connecting portion is disposed at one end of the nylon tap, and the other end of the nylon tap is provided with an ejection surface.

In the ejection mechanism, a limit head is arranged at one end, close to the push plate, of the ejector pin, the push plate comprises a base plate and a limit plate, the base plate is connected with the limit plate, a limit space is formed between the base plate and the limit plate, the limit head is located in the limit space, and the ejector pin penetrates through the limit plate.

In the ejection mechanism, the limiting plate is provided with a limiting groove, the limiting space is formed in the limiting groove, and the limiting head is located in the limiting groove.

In the ejection mechanism, the limit head is provided with a first rotation preventing surface, the limit groove is provided with a second rotation preventing surface, and the first rotation preventing surface can be in contact with the second rotation preventing surface, so that the limit head is limited to rotate relative to the limit groove.

In the ejection mechanism, the positioning protrusion and the positioning recess are bonded.

The utility model also provides a take ejection mechanism's mould, include ejection mechanism, still include:

A fixed die plate provided with a first die core;

The movable mould plate can be close to or far away from the fixed mould plate, the movable mould plate is provided with a second mould core, a cavity is formed between the first mould core and the second mould core, and the nylon head penetrates through the movable mould plate and penetrates through the second mould core.

In the mold with the ejection mechanism, the mold further comprises an elastic piece, wherein the elastic piece is arranged between the movable mold plate and the push plate, and two ends of the elastic piece are respectively connected with the movable mold plate and the push plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the nylon tap that the texture is softer than the thimble and product direct contact, through the mode of local mosaic for nylon tap is plastics and plastics contact with the contact of product, can protect to place into the hard gum product of secondary injection molding, does not have the risk of steel material shovel plastics, only need the fitter just can realize processing and equipment through simple lathe processing simultaneously, and is simple and convenient.

2. The first connecting portion is a positioning bulge and the second connecting portion is a positioning recess with a shape matched with that of the positioning bulge, so that the connection between the nylon tap and the thimble can be realized by inserting the positioning bulge into the positioning recess, and the nylon tap can be maintained and replaced according to actual processing conditions.

3. The pushing surface arranged at one end of the nylon tap, which is far away from the second connecting part, is matched with the surface of the product, so that the contact area between the nylon tap and the surface of the product is increased, the pressure intensity between the nylon tap and the surface of the product is reduced, and scratches or other damages to the surface of the product are avoided.

Drawings

Fig. 1 is an exploded view of an ejection mechanism of the present utility model.

Fig. 2 is an exploded view of an ejection mechanism of the present utility model from another perspective.

FIG. 3 is an exploded view of the thimble and the nylon tap of the present utility model.

FIG. 4 is an exploded view of another view of the thimble and nylon head of the present utility model.

Fig. 5 is a schematic view of the internal structure of the mold with the ejection mechanism according to the present utility model.

In the figure, 100 parts of a base plate, 200 parts of a limiting plate, 210 parts of a limiting groove, 211 parts of a second rotation preventing surface, 300 parts of a thimble, 310 parts of a positioning protrusion, 320 parts of a limiting head, 321 parts of a first rotation preventing surface, 400 parts of a nylon tap, 410 parts of a positioning recess, 420 parts of a pushing surface, 500 parts of a fixed die plate, 510 parts of a first die core, 600 parts of a movable die plate, 610 parts of a second die core and 700 parts of an elastic part.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

As shown in fig. 1-4, an ejector mechanism includes a push plate, a thimble 300, and a nylon head 400.

The push plate is used for installing one or more other parts and plays a role in fixing.

Specifically, the push plate is one of components used for pushing out the molded plastic product from the mold in the plastic mold, and mainly plays a role in fixing.

One end of the thimble 300 is connected with the push plate, and a first connection portion is disposed at the other end of the thimble 300.

Specifically, the thimble 300 is an alloy member or a metal member.

Specifically, the pushing plate is one of components used for pushing out the molded plastic product from the mold in the plastic mold, and mainly plays a role of ejection.

The nylon head 400 is provided with a second connection portion, and the nylon head 400 is connected with the first connection portion of the thimble 300 through the second connection portion.

Specifically, the structures of the first connecting portion and the second connecting portion are not limited in particular, and may be a clamping block or a clamping groove, where the first connecting portion and the second connecting portion may be clamped, or may be a tenon and a mortise head, where the tenon and the mortise head may be mortise-tenon connected, or may be two connecting holes and connected by a fastener, so as to realize detachable connection of the first connecting portion and the second connecting portion.

Or the first connecting part and the second connecting part can be two surfaces which need to be welded, adhered and the like for fixed connection so as to realize the fixed connection of the first connecting part and the second connecting part.

In the prior art, the ejector pin 300 of the ejector component in the traditional die is generally in direct contact with a product through a hard metal head, so that the hard rubber product which is placed into the die for secondary injection molding cannot be protected, the ejector pin 300 is easy to eject the product due to overlarge ejection pressure, the risk of steel shoveling plastics is provided, and the appearance and the reject ratio of the product are seriously affected.

In this embodiment, through the nylon head 400 that the texture is softer than thimble 300 and product direct contact, through the mode of local mosaic for nylon head 400 is plastics and plastics contact with the contact of product, can protect to place into the hard gum product of secondary injection molding, does not have the risk of steel material shovel plastics, only need the fitter to just can realize processing and equipment through simple lathe processing simultaneously, and is simple and convenient.

As shown in fig. 1 to 4, in the above embodiment, the nylon head 400 is detachably connected to the first connecting portion of the ejector 300 through the second connecting portion.

In this embodiment, the structures of the first connection portion and the second connection portion are not particularly limited, and the first connection portion and the second connection portion may be a clamping block or a clamping groove, or may be a tenon and a mortise, and the tenon and the mortise may be mortise-tenon connected, or may be two connection holes and connected by a fastener, so as to realize detachable connection of the first connection portion and the second connection portion.

As shown in fig. 1 to 4, on the basis of the above embodiment, the first connection portion is a positioning protrusion 310, the second connection portion is a positioning recess 410 with a shape matching the shape of the positioning protrusion 310, and the positioning protrusion 310 is inserted into the positioning recess 410.

In this embodiment, the first connection portion is the positioning protrusion 310 and the second connection portion is the positioning recess 410 with a shape matching the shape of the positioning protrusion 310, so that the connection between the nylon tap 400 and the thimble 300 can be achieved by inserting the positioning protrusion 310 into the positioning recess 410, and the nylon tap 400 can be maintained and replaced according to the actual processing condition.

As shown in fig. 1 to 4, in the above embodiment, the second connection portion is disposed at one end of the nylon head 400, and the pushing surface 420 is disposed at the other end of the nylon head 400.

In this embodiment, the pushing surface 420 disposed at the end of the nylon head 400 away from the second connecting portion is adapted to the surface of the product, so as to increase the contact area with the surface of the product, reduce the pressure therebetween, and avoid scratches or other damages to the surface of the product.

As shown in fig. 1 to 4, on the basis of the above embodiment, a limit head 320 is disposed at one end of the ejector pin 300 near the push plate, the push plate includes a base plate 100 and a limit plate 200, the base plate 100 is connected with the limit plate 200, and a limit space is formed therebetween, the limit head 320 is located in the limit space, and the ejector pin 300 passes through the limit plate 200.

In the present embodiment, the base plate 100 is connected to the limiting plate 200 with a limiting space formed therebetween, so that the limiting head 320 is limited between the base plate 100 and the limiting plate 200, and the ejector pins 300 are prevented from being separated from the push plate without mounting other connecting members to the ejector pins 300.

As shown in fig. 1 to 4, in the above embodiment, the limiting plate 200 is provided with a limiting groove 210, the limiting space is formed in the limiting groove 210, and the limiting head 320 is located in the limiting groove 210.

In the present embodiment, the limiting space is formed in the limiting groove 210 provided in the limiting plate 200, so that the limiting groove 210 does not need to open the slot in the substrate 100, thereby limiting the limiting head 320 between the substrate 100 and the limiting plate 200, and preventing the ejector pin 300 from being separated from the push plate without installing other connecting members on the ejector pin 300.

As shown in fig. 1 to 4, on the basis of the above embodiment, the spacing head 320 is provided with a first rotation preventing surface 321, the spacing groove 210 is provided with a second rotation preventing surface 211, and the first rotation preventing surface 321 may contact with the second rotation preventing surface 211, so as to limit the rotation of the spacing head 320 relative to the spacing groove 210.

In this embodiment, the first rotation preventing surface 321 of the limiting head 320 may contact the second rotation preventing surface 211 of the limiting groove 210, so as to limit the limiting head 320 to rotate relative to the limiting groove 210 when the ejector 300 is directly or indirectly stressed.

As shown in fig. 1 to 4, the positioning protrusion 310 is bonded to the positioning recess 410 according to the above embodiment.

In the present embodiment, the connection between the positioning protrusion 310 and the positioning recess 410 is more firmly made by means of adhesion.

In addition, in the actual production process, the operation can be performed by firstly finding a thimble 300 with the diameter of more than 6mm and a nylon head 400 with the diameter identical to that of the thimble 300, then respectively processing a first connecting part and a second connecting part by using a lathe, and then mutually matching the processed thimble 300 with the nylon head 400.

As shown in fig. 1 to 5, a mold with an ejection mechanism, including the ejection mechanism, further includes:

a fixed mold plate 500 provided with a first mold core 510;

specifically, the stationary platen 500 is the portion of the mold that is connected to the stationary portion of the injection machine and typically includes a gating system or the like, wherein the gating system includes a main runner, a sub-runner, and gates that are responsible for directing the flow of molten plastic into the respective cavities.

The movable mold plate 600 may be close to or far from the fixed mold plate 500, the movable mold plate 600 is provided with a second mold core 610, a cavity is formed between the first mold core 510 and the second mold core 610, and the nylon head 400 passes through the movable mold plate 600 and is disposed through the second mold core 610.

Specifically, the movable platen 600 is the portion of the mold that is connected to the moving part of the injection machine and is responsible for demolding from the molded part when the mold is opened.

As shown in fig. 1 to 5, the present invention further includes an elastic member 700, wherein the elastic member 700 is disposed between the movable mold plate 600 and the push plate, and two ends of the elastic member 700 are respectively connected with the movable mold plate 600 and the push plate.

In this embodiment, the two ends of the elastic member 700 are respectively connected to the movable mold plate 600 and the pushing plate, so that the pushing plate can be driven to approach the movable mold plate 600 to push out the product from the second mold core 610.

Claims

1. An ejector mechanism, comprising:

A push plate;

2. An ejector mechanism according to claim 1, wherein said nylon head is detachably connected to said first connecting portion of said ejector pin via said second connecting portion.

3. An ejector mechanism according to claim 2, wherein the first connecting portion is a positioning projection, the second connecting portion is a positioning recess having a shape matching the shape of the positioning projection, and the positioning projection is inserted into the positioning recess.

4. The ejection mechanism of claim 1, wherein the second connecting portion is disposed at one end of the nylon tap, and the other end of the nylon tap is provided with a pushing surface.

5. The ejection mechanism of claim 1, wherein the ejector pin is provided with a limiting head at one end close to the push plate, the push plate comprises a base plate and a limiting plate, the base plate is connected with the limiting plate, a limiting space is formed between the base plate and the limiting plate, the limiting head is located in the limiting space, and the ejector pin penetrates through the limiting plate.

6. An ejector mechanism according to claim 5, wherein the limiting plate is provided with a limiting groove, the limiting space is formed in the limiting groove, and the limiting head is located in the limiting groove.

7. An ejector mechanism according to claim 6, wherein the spacing head is provided with a first anti-rotation surface and the spacing groove is provided with a second anti-rotation surface, the first anti-rotation surface being contactable with the second anti-rotation surface to limit rotation of the spacing head relative to the spacing groove.

8. An ejector mechanism according to claim 3, wherein the locating projection is bonded to the locating recess.

9. A mould with an ejection mechanism, comprising the ejection mechanism of any one of claims 1-8, further comprising:

A fixed die plate provided with a first die core;

10. The mold with an ejection mechanism of claim 9, further comprising an elastic member disposed between the movable mold plate and the push plate, wherein two ends of the elastic member are respectively connected with the movable mold plate and the push plate.