Die core-pulling simplified structure

Abstract

The utility model discloses a mould core-pulling simplified structure, including forming needle, the push board that sets gradually, mould main body, mould main body includes front mould and back mould, its characterized in that: still include the slide bar of fixed push board, be equipped with the slide hole in the mould main body, the slide bar and slide hole sliding cooperation, be equipped with the guide structure of guiding forming needle to exit product between the slide bar and forming needle. The utility model discloses a slide bar has replaced the former slider and the inclined jacks, adopt the slide hole to replace the slide slot, to realize the simplification of structure, not only has reduced processing time and assembly time, also reduced cost accordingly.

Description

Technical Field

[0001] This utility model relates to an injection mold, and more particularly to a simplified core-pulling structure for a mold. Background Technology

[0002] Many products have snap-fit ​​parts formed by holes or grooves. Injection molding of these parts usually uses a slanted core-pulling structure to facilitate demolding.

[0003] The structure of the inclined core pulling is as follows Figure 10 and Figure 11 As shown, the mold includes a forming pin A, a groove, and a slider B that mates with the groove. Slider B has an oblique hole and an oblique ejector rod C that mates with the oblique hole. One end of the forming pin A is connected to the slider, and the oblique ejector rod C is fixed to the push plate. Therefore, when the mold opens, the push plate moves the oblique ejector rod C along the mold opening direction. The oblique ejector rod C then presses the slider B to move along the groove. The slider B then moves the forming pin A, pulling the forming pin out of the product's snap-fit ​​position, thus facilitating the subsequent ejector pins to push the product out along the mold opening direction.

[0004] The aforementioned structure is complex, requiring the machining of milled grooves and pressure strips D on the rear mold. Pressure strip D and the milled grooves form a sliding groove, and slider B must cooperate with inclined ejector rod C to allow slider B to move within the groove. This structure results in long machining and assembly times and high costs. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a simplified structure for mold core pulling.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The simplified core-pulling structure of the mold includes a forming pin, a push plate arranged in sequence, and a mold body. The mold body includes a front mold and a rear mold. The characteristic feature is that it also includes a slide rod fixed to the push plate. The mold body is provided with a sliding hole. The slide rod slides in conjunction with the sliding hole. A guide structure is provided between the slide rod and the forming pin to guide the forming pin out of the product.

[0008] The push plate is provided with a countersunk hole, and the top of the slide rod is provided with a connecting screw hole. The connecting screw is fixed through the countersunk hole and the connecting screw hole.

[0009] The push plate is provided with a D-shaped hole, the countersunk hole is connected to the D-shaped hole, and the end of the slide rod is provided with a D-shaped end that mates with the D-shaped hole.

[0010] The guiding structure includes a straight guide hole in the front mold, an oblique guide hole in the slide bar, and a slide groove. The oblique guide hole communicates with the outside through the slide groove. The end of the forming needle is provided with a guide end. The guide end is slidably engaged with the oblique guide hole and cannot be dislodged from the slide groove. The forming needle is located in the slide groove and can move along the slide groove. The straight guide hole is slidably engaged with the forming needle.

[0011] The oblique guide hole is a circular hole, and the guide end is spherical.

[0012] The bottom end of the slide rod is tapered, and the sliding hole includes a front sliding hole in the front mold and a rear sliding hole in the rear mold, wherein the rear sliding hole is tapered.

[0013] The forming needle has a positioning stepped surface.

[0014] The beneficial effects of this utility model are: this utility model replaces the previous slider and inclined push rod with a sliding rod, and uses a sliding hole instead of a sliding groove, thereby simplifying the structure, reducing processing time and assembly time, and correspondingly reducing costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is an overall structural diagram of the mold;

[0017] Figure 2 This is a diagram of the internal structure of the mold;

[0018] Figure 3 This is a cross-sectional structural view of the mold;

[0019] Figure 4 This is a diagram of the overall structure of the slide bar;

[0020] Figure 5 This is a cross-sectional view of the slide bar;

[0021] Figure 6 This is an overall structural diagram of the forming needle;

[0022] Figure 7 It is a diagram of the overall structure of the product;

[0023] Figure 8 This is the overall structural diagram of the front mold;

[0024] Figure 9 This is the overall structural diagram of the rear mold;

[0025] Figure 10 It is a cross-sectional structural diagram of the old mold structure;

[0026] Figure 11 This is a diagram of the internal structure of the old mold. Detailed Implementation

[0027] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0028] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0029] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0030] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0031] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0032] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0033] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0034] Reference Figures 1 to 9 This utility model discloses a simplified core-pulling structure for a mold, including a forming pin 1, a push plate 2 arranged sequentially, and a mold body. The mold body includes a front mold 3 and a rear mold 4. The forming pin 1 is a circular rod, and its shape can be designed according to the shape of the snap-fit ​​part of the product 14. The forming pin 1 is inserted into the snap-fit ​​forming hole 15 of the forming cavity. The push plate 2, the front mold 3, and the rear mold 4 are all conventional structures, so their specific mechanisms and connections are not detailed. It also includes a sliding rod 5 fixed to the push plate 2. In this application, the sliding rod 5 is a cylindrical rod to facilitate sliding in the mold body. Therefore, the mold body is provided with a sliding hole. In the above description, the sliding hole includes a front sliding hole 6 located in the front mold 3 and a rear sliding hole 7 located in the rear mold 4. The front sliding hole 6 penetrates the front mold 3, while the rear sliding hole 7 is a blind hole. The type of the above holes is designed according to the mold opening requirements. The sliding rod 5 slides with the sliding hole. The sliding rod 5 is guided by the sliding hole and rises and falls during mold opening. As a preferred structure, the bottom end of the sliding rod 5 is a cone shape, and the rear sliding hole 7 is a cone hole. In this way, when the mold is closed, even if there is a slight deviation when the sliding rod 5 is inserted into the rear sliding hole 7, it can be corrected by the cone hole, avoiding interference between the sliding rod 5 and the rear mold 4 and damage.

[0035] A guide structure is provided between the slide bar 5 and the forming needle 1 to guide the forming needle 1 out of the product. Therefore, when the mold is opened, the push plate 2 drives the slide bar 5 to move along the mold opening direction first, and the slide bar 5 drives the forming needle 1 to move along the perpendicular mold opening direction through the guide structure, thereby getting out of the product. Then the front mold 3 will start to move together with the forming needle 1 along the mold opening direction until the mold is fully opened.

[0036] As shown in the figure, the guiding structure includes a straight guide hole in the front mold 3, an oblique guide hole 8 in the slide rod 5, and a slide groove 9. The oblique guide hole 8 communicates with the outside through the slide groove 9, and the straight guide hole communicates with the slide hole. The end of the forming needle 1 is provided with a guide end 10. The guide end 10 is slidably engaged with the oblique guide hole 8 and cannot be dislodged from the slide groove 9. The forming needle 1 is located in the slide groove 9 and can move along the slide groove 9. The straight guide hole is slidably engaged with the forming needle 1. The above structure works by moving the push plate 2, which drives the slide rod 5 to move along the slide hole. The oblique guide hole 8 of the slide rod 5 will squeeze the guide end 10 and drive the forming needle 1 to move. However, the forming needle 1 is restricted by the straight guide hole and therefore cannot move along the mold opening direction, which is the vertical direction. It can only move along the direction perpendicular to the mold opening direction, which is the horizontal direction, so as to disengage from the product. Then the front mold 3 can move together with the forming needle 1 along the mold opening direction until the mold is fully opened. The above structure is easy to manufacture and process. The oblique guide hole 8 and the slide groove 9 can be directly processed by wire cutting. Moreover, the friction between the oblique guide hole 8 and the guide end 10 is small, which improves the service life of the product.

[0037] As a preferred structure, the forming needle 1 has a positioning step surface 11. Of course, there is also a corresponding positioning step surface 11 in the straight guide hole. The positioning of the forming needle 1 is accurately achieved by the abutting of the two positioning step surfaces 11, thereby ensuring the position and structural standard of the formed buckle.

[0038] As a preferred structure, the oblique guide hole 8 is a circular hole and the guide end 10 is spherical. The spherical structure can reduce the contact area with the sliding hole, thereby greatly reducing the influence of friction and improving the service life of the product.

[0039] As shown in the figure, the push plate 2 is provided with a countersunk hole, and the top of the slide rod 5 is provided with a connecting screw hole. The connecting screw 12 is fixed through the countersunk hole and the connecting screw hole. The push plate 2 is fixed to the slide rod 5 by the connecting screw 12, which is not only convenient to process but also easy to assemble.

[0040] As shown in the figure, the push plate 2 is provided with a D-shaped hole, the countersunk hole is connected to the D-shaped hole, and the end of the slide rod 5 is provided with a D-shaped end 13 that cooperates with the D-shaped hole. This can position the slide rod 5 and prevent the slide rod 5 from rotating and twisting in the slide hole to form the needle 1.

[0041] The above provides a detailed description of a simplified mold core-pulling structure provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A simplified core-pulling structure for a mold, comprising a forming pin, a push plate arranged sequentially, and a mold body, the mold body including a front mold and a rear mold, characterized in that: It also includes a slide rod fixed to the push plate, and the mold body is provided with a sliding hole. The slide rod slides in conjunction with the sliding hole, and a guide structure is provided between the slide rod and the forming needle to guide the forming needle out of the product.

2. The mold core-drawing simplification structure according to claim 1, characterized by: The push plate is provided with a countersunk hole, and the top of the slide rod is provided with a connecting screw hole. The connecting screw is fixed through the countersunk hole and the connecting screw hole.

3. The mold core-drawing simplification structure according to claim 1, characterized by: The push plate is provided with a D-shaped hole, the countersunk hole is connected to the D-shaped hole, and the end of the slide rod is provided with a D-shaped end that mates with the D-shaped hole.

4. The mold core-drawing simplification structure according to claim 1, characterized by: The guiding structure includes a straight guide hole in the front mold, an oblique guide hole in the slide bar, and a slide groove. The oblique guide hole communicates with the outside through the slide groove. The end of the forming needle is provided with a guide end. The guide end is slidably engaged with the oblique guide hole and cannot be dislodged from the slide groove. The forming needle is located in the slide groove and can move along the slide groove. The straight guide hole is slidably engaged with the forming needle.

5. The mold core-drawing simplification structure according to claim 4, characterized by: The oblique guide hole is a circular hole, and the guide end is spherical.

6. The mold core-drawing simplification structure according to claim 1, characterized by: The bottom end of the slide rod is tapered, and the sliding hole includes a front sliding hole in the front mold and a rear sliding hole in the rear mold, wherein the rear sliding hole is tapered.

7. The mold core-drawing simplification structure according to claim 1, characterized by: The forming needle has a positioning step surface.

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