Simple and reliable secondary ejection structure

Abstract

The utility model discloses a simple and reliable secondary ejection structure, including back template, thimble board, the forming insert pin of passing back template and with the fixed straight top seat of forming insert pin, its characterized in that: the thimble board in be equipped with limit hole, the straight top seat is located in limit hole and cannot get out, the end of straight top seat is located outside limit hole and can be with back template and move in limit hole, be equipped with the elastic member of making straight top seat reset in limit hole. The end of straight top seat of the utility model is located outside limit hole and can be with back template and move in limit hole, thus with other forming insert pin formed the stroke difference and realized the bone position stripping, and the above structure does not need upper and lower thimble board, also does not need upper and lower thimble board control respectively, thus simplified the structure, thereby also reduced the cost.

Description

Technical Field

[0001] This utility model relates to an injection mold, and in particular to a simple and reliable secondary ejection structure. Background Technology

[0002] In injection molded products, some products have large ribs. During injection molding, these ribs are deeply embedded in the molding surface of the molding inserts. The molding inserts are fixed to the ejector plate by a straight ejector seat. In order to make the ribs come out from the molding surface of the molding inserts, an additional ejector plate is needed in the mold. The molding inserts with ribs are fixed on the lower ejector plate, and other molding inserts are installed on the upper ejector plate.

[0003] In the initial stage, the upper and lower ejector plates eject the product simultaneously. Then, the lower ejector plate stops ejecting while the upper ejector plate continues to eject the product, thus enabling the product's core to be demolded from the molding inserts. The disadvantages of the above structure are its complexity and high cost. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a simple and reliable secondary ejection structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A simple and reliable secondary ejection structure includes a rear template, an ejector plate, a forming insert passing through the rear template, and a straight ejector fixed to the forming insert. The ejector plate is characterized by having a limiting hole, the straight ejector being located in the limiting hole and unable to come out, the end of the straight ejector being located outside the limiting hole and being able to abut against the rear template and move within the limiting hole, and the limiting hole being provided with an elastic element for resetting the straight ejector.

[0007] The limiting hole includes a first hole and a second hole that penetrates the first hole. The diameter of the second hole is larger than the diameter of the first hole, so that the position where the first hole and the second hole meet forms a stepped surface. The straight support includes an upper support body and a lower support body. The lower support body is located in the second hole and can abut against the stepped surface. The upper support body is located in the first hole, and the end is the top of the upper support body. The elastic element is located in the second hole and can push the lower support body to move.

[0008] The elastic element is a spring, one end of which abuts against the bottom surface of hole two, and the other side of which abuts against the lower seat body.

[0009] The ejector plate includes an ejector panel and an ejector base plate. Hole 1 and part of Hole 2 are located in the ejector panel, and another part of Hole 2 is located in the ejector base plate.

[0010] The straight top seat is provided with a countersunk hole that penetrates the straight top seat, and the end of the shaped insert is provided with a connecting screw hole. The connecting screw is connected to the connecting screw hole through the countersunk hole.

[0011] The ejector pin base plate is provided with an operating hole that communicates with the second hole.

[0012] The beneficial effects of this utility model are: the end of the straight ejector seat of this utility model is located outside the limiting hole and can abut against the rear template and move in the limiting hole, thus forming a stroke difference with other molding inserts to achieve bone position demolding. The above structure does not require upper and lower ejector plates, nor does it require upper and lower ejector plates to be controlled separately, thus simplifying the structure and reducing costs. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 It is a cross-sectional structural diagram of the shaped insert and the straight top seat;

[0016] Figure 3 yes Figure 2 A magnified structural diagram at point A;

[0017] Figure 4 These are cross-sectional structural diagrams of other molded inserts and straight top seats;

[0018] Figure 5 yes Figure 4 Enlarged structural diagram at point B. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Reference Figures 1 to 5 This utility model discloses a simple and reliable secondary ejection structure, including a rear template 1, an ejector plate 2, forming pins 3 passing through the rear template 1, and a straight ejector seat 4 fixed to the forming pins 3. The ejector plate 2 has a limiting hole 5, and the straight ejector seat 4 is located in the limiting hole 5 and cannot be removed. The end of the straight ejector seat 4 is located outside the limiting hole 5 and can abut against the rear template 1 and move in the limiting hole 5. An elastic element 6 is provided in the limiting hole 5 to reset the straight ejector seat 4. With the above structure, after the mold is opened, the ejector plate 2 drives all the forming pins 3 to move together to achieve the ejection action. However, because the straight ejector seat 4 of the forming pin 3... The end of the pin is located outside the limiting hole 5. Therefore, the straight seat 4 of the molding pin 3 must first contact the bottom surface of the rear template 1 to restrict its movement. The ejector plate 2 and other molding pins 100 continue to move. When the ejector plate 2 stops in contact with the bottom surface of the rear template 1, the molding pin 3 and other molding pins 100 form a stroke difference. The product is pushed out of the molding pin 3 by the continued movement of the other molding pins 100, thereby realizing the separation of the bone position. The other molding pins 100 are installed in the ejector plate 2 through other straight seats 200. The end face of the other straight seats 200 does not protrude from the surface of the ejector plate 2.

[0027] Of course, when the straight top seat 4 of the molding insert 3 contacts the bottom surface of the rear template 1 and restricts its movement, the straight top seat 4 can compress the elastic element 6 in the limiting hole 5 and move relative to the ejector plate 2, thereby realizing the structure in which the straight top seat 4 remains stationary while the ejector plate 2 continues to move.

[0028] As shown in the figure, the limiting hole 5 includes a first hole 7 and a second hole 8 that penetrates the first hole 7. The diameter of the second hole 8 is larger than the diameter of the first hole 7, so that the position where the first hole 7 and the second hole 8 meet forms a stepped surface 11. The straight support 4 includes an upper support body 9 and a lower support body 10. The lower support body 10 is located in the second hole 8 and can abut against the stepped surface 11. The upper support body 9 is located in the first hole 7, and the end is the top of the upper support body 9. The elastic element 6 is located in the second hole 8 and can push the lower support body 10 to move. As described above, the length of hole 2 8 is greater than the height of lower seat 10. Both upper seat 9 and lower seat 10 are cylindrical. The above structure, as a specific embodiment, demonstrates the function of the ejector seat 4. When the mold is closed, the lower seat 10 moves under the action of the elastic element 6, and the lower seat 10 abuts against the step surface 11, thereby achieving accurate molding position. When the mold is opened, the ejector seat 4 contacts the bottom surface of the rear template 1 and restricts movement, which can compress the elastic element 6 relative to the ejector plate 2 and move along hole 2 8 to achieve stroke difference.

[0029] Specifically, the elastic element 6 is a spring, one end of which abuts against the bottom surface of the second hole 8, and the other side of which abuts against the lower seat 10.

[0030] As shown in the figure, the ejector plate 2 includes an ejector panel 12 and an ejector base plate 13. The first hole 7 and part of the second hole 8 are located in the ejector panel 12, and another part of the second hole 8 is located in the ejector base plate 13. The above structure is convenient for manufacturing and assembly.

[0031] The straight top seat 4 is provided with a countersunk hole that passes through the straight top seat 4. The end of the shaped insert 3 is provided with a connecting screw hole. The connecting screw is connected to the connecting screw hole through the countersunk hole. The bottom plate 13 of the ejector pin is provided with an operating hole 14 that communicates with the second hole 8. The operating hole 14 facilitates the use of a screwdriver to operate the connecting screw, thereby facilitating the removal of the shaped insert 3.

[0032] The foregoing has provided a detailed description of a simple and reliable secondary ejection 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 simple and reliable secondary ejection structure, comprising a rear template, an ejector plate, a forming insert passing through the rear template, and a straight ejector seat fixed to the forming insert, characterized in that: The ejector plate is provided with a limiting hole, the straight ejector seat is located in the limiting hole and cannot be removed, the end of the straight ejector seat is located outside the limiting hole and can abut against the rear template and move in the limiting hole, and the limiting hole is provided with an elastic element to reset the straight ejector seat.

2. The simple and reliable secondary ejection structure according to claim 1, characterized in that: The limiting hole includes a first hole and a second hole that penetrates the first hole. The diameter of the second hole is larger than the diameter of the first hole, so that the position where the first hole and the second hole meet forms a stepped surface. The straight support includes an upper support body and a lower support body. The lower support body is located in the second hole and can abut against the stepped surface. The upper support body is located in the first hole, and the end is the top of the upper support body. The elastic element is located in the second hole and can push the lower support body to move.

3. The simple and reliable secondary ejection structure according to claim 2, characterized in that: The elastic element is a spring, one end of which abuts against the bottom surface of hole two, and the other side of which abuts against the lower seat body.

4. The simple and reliable secondary ejection structure according to claim 2, characterized in that: The ejector plate includes an ejector panel and an ejector base plate. Hole 1 and part of Hole 2 are located in the ejector panel, and another part of Hole 2 is located in the ejector base plate.

5. The simple and reliable secondary ejection structure according to claim 4, characterized in that: The straight top seat is provided with a countersunk hole that penetrates the straight top seat, and the end of the shaped insert is provided with a connecting screw hole. The connecting screw is connected to the connecting screw hole through the countersunk hole.

6. The simple and reliable secondary ejection structure according to claim 5, characterized in that: The ejector pin base plate is provided with an operating hole that communicates with the second hole.

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