Double-pin plate secondary ejection die

Abstract

The utility model discloses a double ejector pin plate secondary ejection mould, its characterized in that, include: female mould, including female mould plate, and female mould plate is equipped with female mould forming cavity, male mould, including male mould plate, and male mould plate is equipped with male mould forming cavity, and male mould forming cavity installs the insert, and the insert penetrates male mould forming cavity, and its end bears and is connected with fixed plate, and the ejection assembly includes first ejection part and second ejection part, and first ejection part includes first ejection plate, and the first ejector pin of first ejection plate fixed connection, and the first ejector pin penetrates the insert, and the end of protruding or withdrawing the insert face, and second ejection part includes second ejection plate, and the second ejector pin of second ejection plate fixed connection, and the second ejector pin pushes male mould plate and draws apart or approaches female mould plate, first, through second ejection part and push male mould plate and move, make the insert and plastic piece preliminary separation, again through first ejection part and push first ejector pin, and the plastic piece is completely ejected, and the problem that complicated plastic piece is easy to crack, deformation is solved once, and the product yield is effectively promoted.

Description

Technical Field

[0001] This invention relates to the field of mold demolding technology, and more particularly to a double ejector plate secondary ejection mold. Background Technology

[0002] In the mold manufacturing industry, especially in the field of plastic molding, the demolding quality of plastic parts directly determines the product qualification rate and production efficiency. As downstream industries (such as automotive electronics, consumer electronics, and precision medical) continue to increase their requirements for the structural complexity and precision of plastic parts, the limitations of traditional one-time ejection technology are becoming increasingly prominent, and have become a key bottleneck restricting the mass production of high-difficulty plastic parts.

[0003] In the current market, the application rate of deep-cavity plastic parts (such as automotive sensor housings and waterproof cavities for electronic devices), internally recessed plastic parts (such as connector housings with undercuts and snap-fit ​​components), and complex gate plastic parts (such as multi-point hot runner gate plastic parts and submarine gate plastic parts) is increasing year by year. A single ejection requires a single ejection force to forcibly remove these plastic parts from the core or cavity. Deep-cavity structures are prone to uneven distribution of demolding force, leading to concavity or cracking of the sidewalls of the plastic parts.

[0004] Therefore, it is necessary to develop a double ejector plate secondary ejection mold to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a double ejector plate secondary ejection mold with a high yield rate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double ejector plate secondary ejection mold, characterized in that it comprises: A master mold, including a master template, wherein the master template is provided with a master mold forming cavity; A male mold includes a male template, the male template having a male mold forming cavity, an insert being installed inside the male mold forming cavity, the insert penetrating the male mold forming cavity, and its end abutting against and connected to a fixing plate; The ejection assembly includes a first ejection portion and a second ejection portion. The first ejection portion includes a first ejection plate and a first ejector pin fixedly connected to the first ejection plate. The first ejector pin passes through the insert and extends out or retracts from the end face of the insert. The second ejection portion includes a second ejection plate and a second ejector pin fixedly connected to the second ejection plate. The second ejector pin pushes the male template closer to or away from the female template.

[0007] Furthermore, the first ejector portion includes a first spring, with both ends of the first spring abutting against the first ejector plate and the second ejector plate, respectively.

[0008] Furthermore, the second ejector portion includes a second spring, with both ends of the second spring abutting against the first ejector plate and a support plate disposed below the male template, respectively.

[0009] Furthermore, the template is embedded with a forming plate, which has a plurality of mounting holes penetrating its upper and lower surfaces. The plurality of mounting holes are arranged at equal intervals, and a fastener is installed inside the plate. The insert is located inside the fastener.

[0010] Furthermore, the fastener has receiving holes penetrating its two end faces, and the insert is installed inside them. One end of the insert is located above the fastener, and the other end extends through the receiving holes and the male template toward the support plate.

[0011] Furthermore, the support plate is recessed inward from its surface to form a mounting groove, and a fixing plate is provided in the mounting groove, with the end of the insert abutting against the surface of the fixing plate.

[0012] Furthermore, the support plate has a mounting hole that extends through its upper and lower surfaces and communicates with the mounting groove, and the end of the insert forms a step, through which the insert is installed in the mounting hole.

[0013] Furthermore, the fastener is higher than the horizontal plane of the molded plate, and the insert is higher than the horizontal plane of the fastener.

[0014] Furthermore, the fastener passes through the mounting hole, with its top positioned above the mounting hole and its bottom abutting against the male template.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a double ejector plate secondary ejection mold with a high yield rate. First, the second ejection part pushes the male template to move, so that the insert and the plastic part are initially separated; then, the first ejection part pushes the first ejector pin to completely eject the plastic part. This avoids the cracking or concavity of deep cavity and undercut plastic parts caused by the forced force of one ejection. It solves the problem of easy cracking and deformation of complex plastic parts in one ejection, and effectively improves the product yield rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a double ejector plate secondary ejection mold according to the present invention; Figure 2 for Figure 1 The cross-sectional view of the double ejector plate secondary ejection mold shown. Figure 3for Figure 1 The diagram shows the structure of the male mold of the double ejector plate secondary ejection mold; Figure 4 for Figure 3 The diagram shows a partial structural diagram of the male mold of the double ejector plate secondary ejection mold. Figure 5 for Figure 3 The diagram shows another partial structure of the male mold of the double ejector plate secondary ejection mold.

[0018] In the diagram: 1. Female mold; 2. Male mold; 3. Ejection assembly; 11. Female mold fixing plate; 12. Stripper plate; 13. Female mold template; 14. Locating ring; 141. Center hole; 21. Male mold fixing plate; 22. Square iron; 23. Support plate; 231. Guide rod; 232. Mounting groove; 233. Mounting hole; 24. Male mold template; 241. Guide sleeve; 25. Molding plate; 251. Mounting hole; 26. Fixing component; 261. Receiving hole; 27. Insert; 271. Step; 28. Fixing plate; 31. First ejector part; 311. First ejector plate; 312. First ejector pin; 313. First spring; 32. Second ejector part; 321. Second ejector plate; 322. Second ejector pin; 323. Second spring. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the double ejector plate secondary ejection mold proposed according to this utility model. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The following description, in conjunction with the accompanying drawings, details the specific solution for the double ejector plate secondary ejection mold provided by this utility model.

[0022] Please refer to Figures 1 to 5 This utility model is a double ejector plate secondary ejection mold, which includes a female mold 1, a male mold 2, and an ejection component 3 disposed in the male mold 2.

[0023] Please refer to Figures 1 to 2 The female mold 1 includes a female mold fixing plate 11, a stripper plate 12 connected to the female mold fixing plate 11, and a female mold template 13.

[0024] The female mold fixing plate 11 serves as the basic load-bearing component on the female mold side. A positioning ring 14 is installed at its center. The positioning ring 14 is divided into two parts: a head and a rod. The head is a circular flange that is locked to the female mold fixing plate 11. The rod is cylindrical and passes through the female mold fixing plate 11 and the stripper plate 12 in sequence, extending into the female mold template 13. Specifically, a central hole 141 is opened at the axis of the positioning ring 14. The diameter of the central hole 141 is consistent with the outer diameter of the sprue sleeve formed on the female mold template 13, and it communicates with the female mold forming cavity (not shown) of the female mold template 13.

[0025] Please refer to Figures 2 to 5 The male mold 2 includes a male mold fixing plate 21, a square iron 22 fixedly connected to the male mold fixing plate 21, a support plate 23 installed on the square iron 22, and a male template 24.

[0026] The male mold fixing plate 21 serves as the core load-bearing and fixing component on the male mold side. There is a pair of square irons 22, which are installed on both sides of the surface of the male mold fixing plate 21. Their bottoms are fixedly connected to the male mold fixing plate 21, and their tops extend upwards and are fixedly connected to the support plate 23. The support plate 23 is provided with a guide rod 231, and the male mold template 24 is provided with a guide sleeve 241. The guide rod 231 extends into the guide sleeve 241, and the male mold template 24 moves along the guide rod 231 through the guide sleeve 241.

[0027] Please refer to Figures 3 to 4 Specifically, the male template 24 is embedded with a forming plate 25, and the surface of the forming plate 25 forms a male mold forming cavity. The forming plate 25 has a number of mounting holes 251 penetrating its upper and lower surfaces. The mounting holes 251 are arranged at equal intervals. A fixing member 26 is installed inside the fixing member 26, which penetrates the mounting holes 251. Its top is located above the mounting holes 251, and its bottom abuts against the male template 24. The fixing member 26 has a receiving hole 261 penetrating its two end faces. An insert 27 is installed inside the insert 27. One end of the insert 27 is located above the fixing member 26, and the other end extends towards the support plate 23 through the receiving hole 261 and the male template 24.

[0028] Specifically, the support plate 23 is recessed inward from the side fixed to the square iron 22 to form a mounting groove 232. A fixing plate 28 is provided in the mounting groove 232, and the end of the insert 27 abuts against the surface of the fixing plate 28. Preferably, the support plate 23 has a mounting hole 233 that penetrates its upper and lower surfaces and communicates with the mounting groove 232. The end of the insert 27 forms a step 271. The insert 27 is installed in the mounting hole 233 through the step 271, so that the insert 27 can only move in the direction of the square iron 22 and the male mold fixing plate 21, and cannot move in the direction of the female mold 1.

[0029] The fastener 26 is higher than the horizontal plane of the molded plate 25, and the insert 27 is higher than the horizontal plane of the fastener 26.

[0030] Please refer to Figure 2 and Figure 5 The ejection component 3 includes a first ejection part 31 and a second ejection part 32.

[0031] The first ejector part 31 is disposed between a pair of square iron plates 22. It includes a first ejector plate 311 and a first ejector pin 312 fixedly connected to the first ejector plate 311. There is a pair of first ejector plates 311. The pair of first ejector plates 311 are disposed between a pair of square iron plates 22 and fixedly clamp the first ejector pin 312. One end of the first ejector pin 312 is fixedly connected to the first ejector plate 311, and the other end passes through the second ejector part 32, the fixing plate 28, the support plate 23, the male template 24 and the insert 27 in sequence.

[0032] The second ejector part 32 is disposed between a pair of square iron plates 22. It includes a second ejector plate 321 and a second ejector pin 322 fixedly connected to the second ejector plate 321. There is a pair of second ejector plates 321. The pair of second ejector plates 321 are disposed between a pair of square iron plates 22 and are located in the direction of movement of the first ejector plate 311. One end of the second ejector pin 322 is fixedly connected to the second ejector plate 321, and the other end extends through the support plate 23 toward the male template 24.

[0033] The first ejector portion 31 includes a first spring 313, with its two ends abutting against the first ejector plate 311 and the second ejector plate 321, respectively; the second ejector portion 32 includes a second spring 323, with its two ends abutting against the first ejector plate 311 and the support plate 23, respectively.

[0034] In this utility model, a double-ejector plate secondary ejection mold is used such that the male mold 2 moves towards and tightly fits the female mold 1. The molding plate 25 and insert 27 on the male mold plate 24, together with the female mold forming cavity of the female mold plate 13, form a complete plastic part cavity. An external injection molding machine injects molten plastic through the center hole 141 of the positioning ring 14 into the sprue sleeve of the female mold plate 13, eventually filling the entire plastic part cavity. After the molten plastic in the cavity cools and solidifies into the desired plastic part, the ejection stage begins.

[0035] The male mold 2 and the female mold 1 separate along the parting surface. The stripper plate 12 on the female mold side will first eject the plastic part from the molding cavity of the female mold. The first ejector plate 311 and the second ejector plate 321 are pushed to move synchronously by the ejector rod (not shown) of the injection molding machine. The second ejector pin 322, which is fixedly connected to the second ejector plate 321, holds the male mold plate 24 and pushes the male mold plate 24 towards the female mold 1. At this time, the second spring 323 is compressed. The insert 27 is restricted by the fixed plate 28 and the support plate 23 and remains stationary. The insert 27 begins to be pulled out of the male mold plate 24 and demolded from the product. When the second ejector plate 321 contacts the support plate 23, the insert 27 is pulled out to the position. The second ejector plate 321 contacts the support plate 23 and stops moving. The first ejector plate 311 continues to move, compressing the first spring 313. The first ejector pin 312, which is fixedly connected to the first ejector plate 311, moves along the insert 27 and ejects the product.

[0036] This utility model is a double ejector plate secondary ejection mold with a high yield rate. First, the second ejector part pushes the male template to move, so that the insert and the plastic part are initially separated. Then, the first ejector part pushes the first ejector pin to completely eject the plastic part. This avoids the cracking or concavity of deep cavity and undercut plastic parts caused by the forced force of a single ejection. It solves the problem of easy cracking and deformation of complex plastic parts in a single ejection, and effectively improves the product yield rate.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-ejector plate secondary ejection mold, characterized in that, include: The master mold (1) includes a master template (13), wherein the master template (13) is provided with a master mold forming cavity; The male mold (2) includes a male template (24), the male template (24) is provided with a male mold forming cavity, an insert (27) is installed in the male mold forming cavity, the insert (27) penetrates the male mold forming cavity, and its end is abutted and connected to a fixing plate (28). The ejector assembly (3) includes a first ejector part (31) and a second ejector part (32). The first ejector part (31) includes a first ejector plate (311) and a first ejector pin (312) fixedly connected to the first ejector plate (311). The first ejector pin (312) passes through the insert (27) and extends out or retracts from the end face of the insert (27). The second ejector part (32) includes a second ejector plate (321) and a second ejector pin (322) fixedly connected to the second ejector plate (321). The second ejector pin (322) pushes the male template (24) closer to or away from the female template (13).

2. The double ejector plate secondary ejection mold according to claim 1, characterized in that: The first ejector portion (31) includes a first spring (313), and the two ends of the first spring (313) abut against the first ejector plate (311) and the second ejector plate (321) respectively.

3. The double ejector plate secondary ejection mold according to claim 1, characterized in that: The second ejector portion (32) includes a second spring (323), the two ends of which abut against the first ejector plate (311) and the support plate (23) located below the male template (24).

4. The double ejector plate secondary ejection mold according to claim 3, characterized in that: The template (24) is embedded with a molding plate (25), which has a number of mounting holes (251) penetrating its upper and lower surfaces. The mounting holes (251) are arranged at equal intervals, and a fastener (26) is installed inside them. The insert (27) is located inside the fastener (26).

5. The double ejector plate secondary ejection mold according to claim 4, characterized in that: The fastener (26) has a receiving hole (261) through both of its end faces, and the insert (27) is installed inside it. One end of the insert (27) is located above the fastener (26), and the other end extends through the receiving hole (261) and the male template (24) toward the support plate (23).

6. The double ejector plate secondary ejection mold according to claim 5, characterized in that: The support plate (23) is recessed from the surface to form a mounting groove (232), and a fixing plate (28) is provided in the mounting groove (232). The end of the insert (27) abuts against the surface of the fixing plate (28).

7. The double ejector plate secondary ejection mold according to claim 6, characterized in that: The support plate (23) has a mounting hole (233) that extends through its upper and lower surfaces and communicates with the mounting groove (232). The end of the insert (27) forms a step (271), and the insert (27) is installed in the mounting hole (233) through the step (271).

8. The double ejector plate secondary ejection mold according to claim 7, characterized in that: The fastener (26) is above the horizontal plane of the molded plate (25), and the insert (27) is above the horizontal plane of the fastener (26).

9. The double ejector plate secondary ejection mold according to claim 7, characterized in that: The fastener (26) passes through the mounting hole (251), with its top located above the mounting hole (251) and its bottom abutting against the male template (24).

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