CN215969873U - Mould for plastic product injection molding - Google Patents

Abstract

The invention relates to a mold for plastic product injection, which comprises a mold main body, wherein the mold main body is provided with a cavity, a sprue for fluid to enter is arranged on the mold main body, and the sprue is communicated with the cavity; and a buckling injection molding structure for forming a buckling position through injection molding is arranged on the pouring gate, and the buckling position is used for being connected with the spraying jig in a matching manner. Because the buckle position is positioned on the gate column, production raw materials are reduced, and when the gate column is punched, the buckle position is also punched, namely, the gate column and the buckle position can be removed simultaneously, so that the production procedures are reduced, and the production cost is reduced.

Description

Mould for plastic product injection molding

Technical Field

The utility model relates to a technical field that moulds plastics especially relates to a plastic product moulds plastics and uses mould.

Background

The injection mold generally includes: the injection molding device comprises a mold main body, wherein a pouring gate is arranged on the mold main body, is a feeding runner connecting a sub-runner and a cavity and is used for allowing fluid for injection molding to enter the cavity. Wherein, still be provided with on the mould main part and detain a passageway to be formed with the knot position that is used for connecting the spraying tool on the injection molding body that makes moulding plastics out simultaneously. The buckling channels and the gates are arranged on the die main body at intervals.

The production process for manufacturing the plastic product (such as a battery cover of a mobile phone) comprises the following steps: injection molding, die cutting of a gate column, spraying and die cutting of a buckling position. Specifically, an injection molding body of the battery cover is prepared through an injection mold, then a gate column on the injection molding body is punched out, then the spraying jig is connected to the injection molding body through a buckling position on the injection molding body, the injection molding body is sprayed through the spraying jig, the buckling position on the injection molding body is punched out after spraying is finished, and finally the battery cover is formed.

However, the gate and the buckle position channel on the existing injection mold are separately arranged on the mold main body, so that more production raw materials are needed, and in the process of manufacturing the battery cover, the gate column and the buckle position need to be respectively punched, so that more production processes are needed, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a mold for injection molding of a plastic product.

The invention provides a mold for plastic product injection, which comprises a mold main body, wherein the mold main body is provided with a cavity, a sprue for fluid to enter is arranged on the mold main body, and the sprue is communicated with the cavity;

and a buckling injection molding structure for forming a buckling position through injection molding is arranged on the pouring gate, and the buckling position is used for being connected with the spraying jig in a matching manner.

Optionally, the buckling injection structure is a buckling injection molding cavity arranged on the sprue, and the buckling injection molding cavity is communicated with the sprue.

Optionally, the catching injection molding cavity extends from one side of the gate to a direction away from the gate.

Optionally, the cross-sectional dimension of the catching injection molding cavity is gradually reduced in a direction away from the gate.

Optionally, the buckling injection molding structure and the gate are integrally molded.

Optionally, the injection-molded snap feature is located on the gate at a position 1/2 that is no higher than the height of the gate.

Optionally, the mold main body is provided with a plurality of gates, the plurality of gates are arranged at intervals along the circumferential direction of the mold main body, and each gate is provided with the fastening injection molding structure.

Optionally, the plurality of gates are respectively arranged at two sides of the mold main body, and the gates at two sides of the mold main body are arranged in a staggered manner.

Optionally, the mold body comprises a pouring plate, and the gate is disposed on the pouring plate.

Optionally, the plastic product is a battery cover.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the utility model provides a plastic product moulds plastics and uses mould, is used for moulding plastics to form the knot position injection structure who detains the position through setting up on the runner of mould main part, promptly, will detain position injection structure and set up on the runner. When making the plastic product like this, earlier prepare out the injection molding body of this plastic product (for example battery cover) through this mould for injection molding, owing to detain a position injection structure and set up on the runner, consequently, have on the runner post of the injection molding body that the formation of moulding plastics and detain the position, connect the spraying tool on the injection molding body through this knot position, carry out the spraying through the spraying tool to this injection molding body, cut off the runner post after the spraying. With prior art's runner and knot position passageway separately setting, need dash earlier and cut the runner post, the scheme of die-cut knot position again after the spraying compares, utilize the injection molding body that this mould for moulding plastics was made, owing to detain the position on the runner post, consequently, production raw materials has been reduced, when punching away the runner post in addition, will detain the position and also cut away, promptly, can remove the runner post and detain the position simultaneously, thereby reduced production processes, and then reduced manufacturing cost.

Drawings

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

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic cross-sectional view of a mold for injection molding of plastic products according to an embodiment of the disclosure;

FIG. 2 is a schematic structural diagram of an injection molded body injected by the mold for injection molding of a plastic product according to the embodiment of the disclosure;

fig. 3 is a sectional view taken along line B-B in fig. 2.

Wherein, 1, injection molding; 11. a gate post; 12. buckling; 2. a mold body; 20. pouring a plate; 21. a cavity; 22. a gate; 23. buckling injection molding structures; 231. and buckling an injection molding cavity.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

The injection mold is provided with a pouring system, the pouring system comprises a main runner, a sub-runner and a pouring gate, wherein an inlet of the main runner is communicated with a nozzle of the injection molding machine, an inlet of the sub-runner is communicated with an outlet of the main runner, and the pouring gate is connected between an outlet of the sub-runner and the cavity, namely, the pouring gate is a feeding channel which is used for connecting the sub-runner and the cavity and used for allowing injection molding fluid to enter the cavity. The gate has two functions: firstly, controlling the plastic fluid to flow into the cavity; secondly, after the injection pressure is removed, the cavity is sealed, so that the plastic which is not cooled and solidified in the cavity cannot flow backwards.

The mold body for injection molding plastic products is also provided with a buckling channel, so that a buckling position for connecting a spraying jig is formed on the injection molded body. When a plastic product (such as a battery cover) is produced, firstly, an injection molding body of the battery cover is prepared through an injection mold, then a gate column on the injection molding body is punched out, then a spraying jig is connected to the injection molding body through a buckling position on the injection molding body, the injection molding body is sprayed through the spraying jig, the buckling position on the injection molding body is punched out after spraying is finished, and finally the battery cover is formed. That is, the production process of plastic products in the prior art is as follows: injection molding, die cutting of a gate column, spraying and die cutting of a buckling position. The sprue and the buckling position channel on the injection mold are separately arranged on the mold main body, so that more production raw materials are needed, and in the process of manufacturing the battery cover, the sprue column and the buckling position need to be respectively punched, so that more production processes are needed.

Based on this, the present embodiment provides a mold for injection molding of plastic products, which is described in detail by the following specific embodiments:

referring to fig. 1 to 3, the mold for injection molding of plastic products of the present embodiment includes: the mould main body 2, the mould main body 2 has the die cavity 21, the concrete shape of this die cavity 21 matches with the shape of plastic product.

Wherein, a gate 22 for the fluid to enter is arranged on the main body 2 of the mold, and the gate 22 is communicated with the cavity 21. Specifically, the gate 22 is connected between the runner and the cavity 21, the inlet of the runner is communicated with the nozzle of the injection molding machine, and the fluid for injection molding is ejected from the nozzle of the injection molding machine, enters the gate 22 through the runner, and then enters the cavity 21 through the gate 22, thereby forming the injection molded body 1.

And a buckling position injection molding structure 23 for forming a buckling position 12 through injection molding is arranged on the pouring gate 22, and the buckling position 12 is used for being connected with a spraying jig in a matching manner. That is, in the injection process, the fluid flows into the cavity 21 through the gate 22, and after the injection is completed, the mold is removed, and the gate post 11 is formed at the position of the injection molded body 1 corresponding to the gate 22, and the gate post 11 forms the catching position 12 because the catching injection structure 23 is arranged on the gate 22. That is, the gate post 11 of the injection molded article 1 after the mold release has a catch 12.

In concrete implementation, the mold main body 2 is provided with a plurality of gates 22, and the plurality of gates 22 are arranged on the mold main body 2 at intervals so as to improve the injection molding efficiency. In some embodiments, the plurality of gates 22 are arranged at intervals along the circumferential direction of the mold main body 2, and each gate 22 is provided with a fastening injection structure 23, so that the plurality of gates 22 are arranged at intervals along the circumferential direction of the mold main body 2, thereby improving the injection efficiency and the injection uniformity to some extent.

The gates 22 may be disposed on both sides of the mold body 2, and the gates 22 disposed on both sides of the mold body 2 may be staggered. Referring to fig. 2, that is, the injection molded body 1 formed by injection molding has a plurality of gate columns 11, the plurality of gate columns 11 are respectively arranged on both sides of the injection molded body 1, and the gate columns 11 on both sides of the injection molded body 1 are staggered with each other. Because the gate post 11 on the injection molding body 1 formed by injection molding is finally cut off by punching, the plurality of gates 22 are respectively arranged on the two sides of the mold main body 2, so that the flatness of the middle area of the injection molding body 1 can be ensured to a certain extent, and the injection molding uniformity can be further improved. Because each gate post 11 is formed with detains position 12, detain the combined action of position 12 through a plurality of and connect the spraying tool on injection molding 1, improved the reliability and the stability of connecting.

For example, the plastic product is a battery cover, the mold body 2 for manufacturing the battery cover has eight gates 22, the eight gates 22 are respectively disposed on the left side and the right side of the mold body 2, and the four gates 22 on the left side and the four gates 22 on the right side are staggered with each other.

Specifically, the mold main body 2 includes a movable mold and a fixed mold, and the movable mold is movable toward the fixed mold to define the cavity 21 together with the fixed mold. Wherein, the movable mould and the fixed mould are both provided with a pouring plate 20, and the pouring gate 22 is arranged on the pouring plate 20.

The battery cover is manufactured by using the injection mold of the embodiment as an example:

the injection molding battery cover is used for injection molding, demolding is carried out after injection molding is finished, a gate column 11 is arranged on a formed injection molding body 1, a buckling position 12 is arranged on the gate column 11, a spraying jig is connected to the injection molding body 1 through the buckling position 12, the injection molding body 1 is sprayed by the spraying jig, the spraying jig is taken down after spraying is finished, then the gate column 11 with the buckling position 12 is cut off in a punching mode, and a final battery cover can be obtained.

That is to say, the production process of manufacturing the battery cover by using the injection mold provided by the embodiment comprises the following steps: injection molding-spray coating-die cutting of the gate post 11. Compared with the scheme of injection molding, die cutting of the gate column, spraying and die cutting of the buckling position in the prior art, raw materials and production procedures required for production are obviously reduced, and the production cost is greatly reduced.

Use the mould main part of prior art to have eight runners and ten knot positions, the mould main part 2 of this embodiment has eight runners 22, has a knot position 12 on every runner 22 and compares for the example, through the actual production verification, compare with prior art, the mould for injection moulding that this embodiment provided, each product of final production has reduced former ten knot position raw materials 0.058g, saves cost 0.00232 yuan, and every product reduces the machine, tool and the personnel of die-cut knot position, saves cost 0.15 yuan.

The injection mold of the embodiment is specifically used for injection molding of plastic products, such as plastic parts of electronic products: a mobile phone rear cover, a mobile phone battery cover and the like. The mobile phone rear cover and the mobile phone battery cover are only used for convenience of description, and the plastic product is not limited to a component of an electronic product and can also be applied to a plastic product which needs to be connected with a spraying jig to spray the injection molding body 1 in a production process.

In the mold for injection molding of plastic products according to the present embodiment, the gate 22 of the mold main body 2 is provided with the catching structure 23 for injection molding of the catching portion 12, that is, the catching structure 23 is provided on the gate 22. Like this when the preparation plastic product, earlier prepare out the injection molding 1 of this plastic product through this mould for injection molding, because detain position injection structure 23 and set up on runner 22, consequently, have on the runner post 11 of the injection molding 1 that forms of moulding plastics and detain position 12, connect the spraying tool on injection molding 1 through this knot position 12, carry out the spraying through the spraying tool to this injection molding 1, cut off runner post 11 after the spraying. With prior art's runner and knot position passageway separately setting, need die-cut runner post earlier, die-cut knot position's scheme is compared after the spraying, utilize the injection molding body that this mould for injection molding made, because detain position 12 and be located runner post 11, consequently, production raw materials has been reduced, when cutting away runner post 11, will detain position 12 simultaneously and also cut away, promptly, can remove runner post 11 and knot position 12 simultaneously, thereby reduced production processes, and then reduced manufacturing cost.

Referring to FIG. 3, in some embodiments, the capture injection feature 23 is embodied as a capture injection cavity 231 disposed on the gate 22, the capture injection cavity 231 being in communication with the gate 22. It will be understood that the fluid enters the gate 22 from the inlet end of the gate 22, and when the position of the catching injection cavity 231 is reached, the fluid enters the catching injection cavity 231, and the fluid continues to flow along the gate 22 and enters the cavity 21, and when the mold is removed, the injection molded body 1 forms the gate post 11 with the catching position 12 corresponding to the position of the gate 22. Wherein the injection structure 23 can be integrally formed with the gate 22.

Specifically, the catching cavity 231 may extend from one side of the gate 22 to a direction away from the gate 22, and as illustrated in fig. 1, the catching cavity 231 on the gate 22 on the left side in fig. 1 extends toward the gate 22 on the right side, and the catching cavity 231 on the gate 22 on the right side extends toward the gate 22 on the left side. Wherein the inlet end of the gate 22 may particularly be arranged at the top of the gate 22.

The cross-sectional dimension of the catching position injection molding cavity 231 is gradually reduced in the direction away from the gate 22, so that the cross-sectional dimension of the catching position 12 formed by injection molding is gradually reduced in the direction away from the gate post 11, thereby facilitating the connection between the catching position 12 and the spraying jig.

In some embodiments, the capture injection molded structure 23 is located on the gate 22 at a position no higher than 1/2 the height of the gate 22. Thus, when the spraying jig is connected to the injection molding body 1 through the buckling position 12, the spraying jig is more stable.

During concrete implementation, the spraying jig is provided with a clamping groove, and the buckling position 12 can be matched with the clamping groove in a clamping manner, so that the spraying jig is connected to the injection molding body 1. In addition, the spraying jig may also be provided with a buckle that can be engaged with the buckling position 12 in a matching manner, so that the spraying jig is connected to the injection molding body 1 through the engagement between the buckle and the buckling position 12. Or, a clamping gap may be formed between the injection molded fastening position 12 and the bottom end of the gate 22, and the spraying jig may have a fastener that can be clamped into the clamping gap.

In addition, in other implementation manners, the buckling position 12 can also be a clamping groove formed by the inward concave part of the gate post 11, that is, the buckling position injection structure 23 is a concave groove arranged on the gate 22, so that a corresponding clamping groove is formed on the gate post 11 formed after injection molding, the spraying jig is provided with an elastic buckle which can be clamped into the clamping groove, and the spraying jig is connected to the injection molding body 1 through the matching of the elastic buckle and the clamping groove.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The mold for injection molding of the plastic product is characterized by comprising a mold main body (2), wherein the mold main body (2) is provided with a cavity (21), a sprue (22) for allowing fluid to enter is arranged on the mold main body (2), and the sprue (22) is communicated with the cavity (21);

a buckling injection molding structure (23) used for forming a buckling position (12) through injection molding is arranged on the pouring gate (22), and the buckling position (12) is used for being connected with a spraying jig in a matched mode.

2. The mold for injection molding of plastic products according to claim 1, wherein the catching injection structure (23) is a catching injection cavity (231) disposed on the gate (22), and the catching injection cavity (231) is communicated with the gate (22).

3. The mold for injection molding of plastic products according to claim 2, wherein the catching cavity (231) extends from a side of the gate (22) in a direction away from the gate (22).

4. A mold for injection molding of plastic products according to claim 3, characterized in that the cross-sectional dimension of the catching cavity (231) is gradually reduced in a direction away from the gate (22).

5. The mold for injection molding of plastic products according to claim 1, wherein the catching injection structure (23) is integrally formed with the gate (22).

6. The mold for injection molding of plastic products according to any one of claims 1 to 5, wherein the catching injection structure (23) is located on the gate (22) at a position not higher than 1/2 of the height of the gate (22).

7. The mold for injection molding of plastic products according to any one of claims 1 to 5, wherein the mold body (2) is provided with a plurality of gates (22), the plurality of gates (22) are arranged at intervals along the circumferential direction of the mold body (2), and each gate (22) is provided with the catching injection structure (23).

8. The mold for injection molding of plastic products according to claim 7, wherein the plurality of gates (22) are respectively provided on both sides of the mold body (2), and the gates (22) located on both sides of the mold body (2) are arranged to be staggered with respect to each other.

9. A mold for injection molding of plastic products according to any of claims 1 to 5, wherein the mold body (2) comprises a casting plate (20), and the gate (22) is provided on the casting plate (20).

10. The mold for injection molding of a plastic product according to any one of claims 1 to 5, wherein the plastic product is a battery cover.

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