CN216068430U - Mold for injection molding - Google Patents

Abstract

The embodiment of the application discloses a mold for injection molding, which comprises a first mold, a second mold and a third mold; the first mold and the second mold enclose to form an injection space, and an elastic injection product is formed by injection molding in the injection space; the surface of the first die, which is in contact with the shot product, is provided with a floating stopping groove, the floating stopping groove comprises a top groove body and a bottom groove body, and the maximum width of the cross section of the bottom groove body is greater than that of the top groove body. The technical effect of the embodiment of the application lies in that the structural design is very reasonable, the use is convenient, and when the injection molding is performed on the injection product again, the injection product and the first mold can not be separated, so that the multiple injection molding effect of the product is ensured.

Description

Mold for injection molding

Technical Field

The application belongs to the technical field of injection molding, specifically, this application relates to a mould for injection moulding.

Background

With the great popularity of electronic products in recent years, more and more products need to be injection molded multiple times. For example, a single shot product is formed by injection molding, and then a double shot product is formed by injection molding on the single shot product, i.e., injection molding is performed again after the single shot product is formed.

In the process of performing injection molding again on the existing first-shot product, the pressure and impact force of the second shot are large, so that the first-shot product is easy to float after being impacted by the second-shot fluid, and the product cannot achieve an ideal injection molding effect.

SUMMERY OF THE UTILITY MODEL

It is an object of embodiments of the present application to provide a new solution for a mold for injection molding.

According to a first aspect of the present application, there is provided a mold for injection molding, comprising:

the injection molding device comprises a first mold and a second mold, wherein the first mold and the second mold enclose to form an injection space, and an elastic injection product is formed by injection molding of the injection space;

the surface of the first die, which is in contact with the shot product, is provided with a floating stopping groove, the floating stopping groove comprises a top groove body and a bottom groove body, and the maximum width of the cross section of the bottom groove body is greater than that of the top groove body.

Optionally, the injection molding device further comprises a third mold, the first mold and the third mold enclose a second injection space, the first injection product is located in the second injection space, and the second injection product is formed by injection molding in the second injection space.

Optionally, a first gate communicated with the first injection space is arranged on the first mold.

Optionally, the first gate is located in a middle portion of the first mold.

Optionally, a second gate communicated with the second injection space is arranged on the third mold.

Optionally, a second gate is provided at a fitting gap of the first mold and the third mold, and the second gate communicates with the second injection space.

Optionally, the float-stopping groove is of an annular structure.

Optionally, the number of the float stopping grooves is multiple, and the plurality of float stopping grooves are distributed along the periphery of the first mold.

Optionally, the bottom slot is spherical.

Optionally, the longitudinal section of the float stopping groove is trapezoidal.

Optionally, the method further comprises: an insert located between the first mold and the second mold;

when the injection molding is carried out on the injection space, the embedded piece is embedded in the injection product.

One technical effect of the embodiment of the application is as follows: through set up on first mould and end the floating groove to make the cross section maximum width of bottom cell body be greater than the cross section maximum width of top cell body, thereby make and have elasticity when penetrating the product to a space injection moulding formation, partly meeting joint that penetrates the product is in ending the floating groove, thereby makes one penetrate the product and is connected very stably with first mould. Then, when the injection molding is performed to the second injection space to form the second injection product, because the connection between the first injection product and the first mold is very stable, the impact force of the second injection fluid cannot separate the first injection product from the cavity wall of the first mold, and the second injection rubber cannot enter the bottom of the first mold, thereby ensuring the injection molding quality of the second injection product.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of an exploded structure of an injection mold for injection molding according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a two-shot mold for injection molding according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of an injection mold for injection molding according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a two-shot molding of a mold for injection molding according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a first mold of a mold for injection molding according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a first mold of a mold for injection molding according to an embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of a first mold of a mold for injection molding provided in an embodiment of the present application;

FIG. 8 is a cross-sectional view of a float stop groove of a mold for injection molding according to an embodiment of the present disclosure;

fig. 9 is a cross-sectional view of another float stopping groove of a mold for injection molding according to an embodiment of the present application.

In the figure: 1. a first mold; 11. a float stopping groove; 111. a top trough body; 112. a bottom trough body; 2. a second mold; 3. a third mold; 4. injecting the product; 5. injecting the product twice; 61. a first gate; 62. a second gate; 7. an inner insert.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 9, the present embodiment provides a mold for preventing a shot product 4 from floating, which is used to manufacture a product for multiple injection molding.

Specifically, the mold for preventing the floating of the shot product 4 includes a first mold 1 and a second mold 2. The first mold 1 and the second mold 2 are used to make a shot product 4.

Further specifically, referring to fig. 3, the first mold 1 and the second mold 2 enclose a shot space, a shot product 4 having elasticity is formed by injection molding to the shot space, and the shot product 4 has elasticity, so that the product is easily taken out of the molds during demolding.

Referring to fig. 7, a surface of the first mold 1 contacting the shot product 4 is provided with a float stopping groove 11, the float stopping groove 11 includes a top groove 111 and a bottom groove 112, and a maximum width of a cross section of the bottom groove 112 is greater than a maximum width of a cross section of the top groove 111. The floating stopping groove 11 enables the first injection product 4 to be stably connected with the first mold 1, and effectively prevents the first injection product 4 from being released from the first injection mold in the subsequent injection molding process, thereby affecting the quality of the subsequent injection molded product.

It should be noted that the portion of the shot of product 4 that is injection molded into the float stop groove 11 is removed after the product is demolded to maintain the final product with good integrity.

Referring to fig. 4, the mold for injection molding further includes a third mold 3, and the first mold 1 and the third mold 3 are used to make a two-shot product 5. The first mold 1 and the third mold 2 enclose to form a second injection space, and the first injection product 4 is positioned in the second injection space and is injected and molded into the second injection space to form a second injection product 5. In the process of secondary injection molding, the impact force of the secondary injection fluid cannot separate the primary injection product 4 from the cavity wall of the first mold 1, and the secondary injection rubber cannot enter the bottom of the first mold 1, so that the injection molding quality of the secondary injection product 5 is ensured.

The embodiment provides a prevent a mould that 4 buoyed of product were penetrated to one, and structural design is very reasonable, and convenient to use, when 4 injection moulding once more to penetrating the product, one penetrated product 4 and first mould 1 and can not break away from to the many times injection moulding effect of product has been guaranteed.

Alternatively, as shown in fig. 3, 4 and 7, the first mold 1 is provided with a first gate 61 communicating with a shot space. The glue is injected into the first injection space through the first gate 61, so that the operation is very convenient, and the first injection product 4 with a relatively complete structure is conveniently formed.

Alternatively, the first gate 61 is located in the middle of the first mold 1. This enables the glue injected into an injection space through the first gate 61 to be distributed more evenly and rapidly in an injection space, well ensuring the quality of an injected product 4.

Alternatively, as shown in fig. 4, a second gate 62 communicating with the second shot space is provided on the third mold 2. And rubber is injected into the secondary injection space through the second gate 62, so that the secondary injection space can be well filled with the rubber, and the quality of secondary injection molding is well ensured.

Alternatively, a second gate 62 is provided at the fitting gap of the first mold 1 and the third mold 3, and the second gate 62 communicates with the second shot space. This makes the formation of the second gate 62 very simple and facilitates the injection of the glue into the second shot space.

In one embodiment, as shown in fig. 5, the floating stop groove 11 has a ring structure, so that the clamping area between the glue in the floating stop groove 11 and the floating stop groove 11 is increased, which enables the glue in the floating stop groove 11 to be fixed in the first mold 1 relatively stably, and effectively prevents the one-shot product 4 from being released from the first mold 1.

In another embodiment, as shown in fig. 6, the number of the float stopping grooves 11 is plural, and the plural float stopping grooves 11 are distributed along the periphery of the first mold 1. This makes a product 4 of penetrating stably in first mould 1 joint, effectively prevents that a product 4 of penetrating from following first mould 1 in the process of two shot moulding from deviating from.

In a specific embodiment, as shown in fig. 8, the bottom slot 112 is spherical, which enables the one-shot product 4 to be stably clamped with the first mold 1, and improves the stability of the connection between the two.

In another embodiment, as shown in fig. 9, the longitudinal section of the float stopping groove 11 is trapezoidal, which enables the shot product 4 to be firmly clamped in the first mold 1, thereby effectively preventing the shot product 4 from being released from the first mold 1.

Optionally, the method further comprises: the inner insert 7 is positioned between the first die 1 and the second die 2; the insert 7 is embedded inside an injection product 4 during injection molding into an injection space. The insert 7 is embedded inside the two-shot product 5, that is, when the injection molding is performed for one time, a part of the insert 7 is embedded in the one-shot product 4, and when the injection molding is performed for the second time, another part of the insert 7 is embedded in the two-shot product 5. The requirement that the inner insert 7 needs to be embedded and shot in the product for multiple times is met, and the application range is wide.

To sum up, through set up on first mould 1 and end floating groove 11 to make the cross section maximum width of bottom cell body 112 be greater than the cross section maximum width of top cell body 111, thereby make to penetrate space injection moulding and form to have elasticity when penetrating product 4, partly meeting joint that a penetrates product 4 is in ending floating groove 11, thereby makes one penetrate product 4 and be connected very stably with first mould 1. Then, when the second injection product 5 is formed by injection molding in the second injection space, because the first injection product 4 is very stably connected with the first mold 1, the impact force of the second injection fluid cannot make the first injection product 4 separate from the cavity wall of the first mold 1, and the second injection rubber cannot enter the bottom of the first mold 1, thereby ensuring the quality of the injection molding of the second injection product 5.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (10)

1. A mold for injection molding, comprising:

the injection molding device comprises a first mold and a second mold, wherein the first mold and the second mold enclose to form an injection space, and an elastic injection product is formed by injection molding of the injection space;

the surface of the first die, which is in contact with the shot product, is provided with a floating stopping groove, the floating stopping groove comprises a top groove body and a bottom groove body, and the maximum width of the cross section of the bottom groove body is greater than that of the top groove body.

2. The mold for injection molding according to claim 1, further comprising;

and the first injection product is positioned in the second injection space, and is subjected to injection molding to form a second injection product.

3. The mold for injection molding according to claim 1, wherein a first gate communicating with the first shot space is provided on the first mold; the first gate is located in a middle portion of the first mold.

4. The mold for injection molding according to claim 2, wherein a second gate communicating with the second shot space is provided on the third mold.

5. The mold for injection molding according to claim 2, wherein a second gate is provided at a fitting gap of the first mold and the third mold, the second gate communicating with the second shot space.

6. The mold for injection molding according to claim 1, wherein the float groove is a ring-shaped structure.

7. The mold for injection molding according to claim 1, wherein the float stopping groove is plural in number, and the plural float stopping grooves are distributed along a periphery of the first mold.

8. The mold for injection molding of claim 1, wherein the bottom channel is spherical.

9. The mold for injection molding according to claim 1, wherein the float groove has a trapezoidal longitudinal section.

10. The mold for injection molding according to claim 1, further comprising: an insert located between the first mold and the second mold;

when the injection molding is carried out on the injection space, the embedded piece is embedded in the injection product.

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