Injection mold pin pulling device

Abstract

The utility model discloses a kind of injection mould needle extraction devices of anti-embedded part exposure, comprising: fixedly installed on the driving source of upper die;First slider insert and second slider insert, the side of first slider insert away from second slider insert is connected with first slide base, the side of second slider insert away from first slider insert is connected with second slide base;First slider insert and second slider insert are respectively slidably fitted with first insert needle and second insert needle, the end of first insert needle and second insert needle away from each other is respectively connected with first small slider and second small slider, first small slider and first slide base are slidably fitted, second small slider and second slide base are slidably fitted;Through above-mentioned mode, the utility model can be cooperated by the cooperation of driving source control knob and small slider, make insert needle timely action in injection molding process, both stable positioning metal embedded part prevents its deviation, and can be withdrawn before plastic solidification to avoid embedded part exposure, to ensure product appearance integrity and electrical performance.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold needle extraction device for preventing exposed inserts. Background Technology

[0002] In the field of injection molding, injection molding is an important method for mass-producing complex-shaped plastic products. For some products containing metal inserts, the metal inserts need to be pre-placed in the mold cavity during the injection molding process, followed by the injection of molten plastic. After cooling and solidification, the metal inserts are encased in the plastic product. However, existing mold designs typically use simple pin structures to fix the metal inserts. This structure often fails to effectively prevent the metal inserts from shifting or deforming when the high-pressure molten plastic fills the cavity, leading to substandard product dimensional accuracy. A more significant problem is that traditional pins leave holes after injection molding, exposing the metal insert portion. This not only affects the product's appearance but also causes the product to fail subsequent electrical tests such as voltage and current tests due to insulation issues, severely impacting product quality and yield. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a needle-removing device for injection molds that prevents exposed inserts. It can control the cooperation between the push block and the small slider through the drive source so that the insert moves in a timely manner during the injection process. This not only stabilizes and positions the metal insert to prevent it from shifting, but also retracts it before the plastic solidifies to avoid the insert being exposed, thereby ensuring the integrity of the product's appearance and electrical performance.

[0004] To solve the above-mentioned technical problems, the present invention provides a pin-removing device for injection molds that prevents exposed inserts, comprising: a drive source fixedly mounted on an upper mold; a first slider insert and a second slider insert arranged opposite to each other, wherein a first slide block is connected to the side of the first slider insert away from the second slider insert, and a second slide block is connected to the side of the second slider insert away from the first slider insert; a first insert pin and a second insert pin are slidably engaged in the first slider insert and the second slider insert, respectively; a first small slider and a second small slider are respectively connected to the ends of the first insert pin and the second insert pin that are away from each other; the first small slider is slidably engaged with the first slide block, and the second small slider is slidably engaged with the second slide block; the first insert pin and the second insert pin extend into or retract from the mold cavity as the first small slider and the second small slider move; the drive source is connected to a telescopic plate, and the telescopic plate is provided with a first lever and a second lever facing the first small slider and the second small slider, respectively, such that the first lever is used to push the first small slider to slide, and the second lever is used to push the second small slider to slide.

[0005] Preferably, the first small slider has a first guide groove, and one end of the first push block cooperates with the first guide groove, so that when the first push block is inserted into the first guide groove, it cooperates with the first guide groove to push the first small slider to slide in the first slide block.

[0006] Preferably, the first guide groove has first positioning grooves on both sides, and the first lever includes a first connecting rod and a first positioning block extending from the first connecting rod. The first positioning block cooperates with the first positioning groove, so that when the first lever is inserted into the first guide groove, the position between the first lever and the first small slider is stabilized by the cooperation between the first positioning block and the first positioning groove.

[0007] Preferably, a first guide slope is provided on the side of the first guide groove near the first slider insert, a first guide block is provided between the two first positioning blocks, and a second guide slope is provided on one side of the first guide block to cooperate with the first guide slope, thereby pushing the first small slider to slide.

[0008] Preferably, a first spring is provided between the first small slider and the first slider insert, so that when the first lever disengages from the first small slider, the first small slider is reset under the action of the first spring.

[0009] Preferably, the second small slider is provided with a second guide groove, and one end of the second pusher block cooperates with the second guide groove, so that when the second pusher block is inserted into the second guide groove, the cooperation with the second guide groove pushes the second small slider to slide in the second slide block.

[0010] Preferably, the second guide groove has second positioning grooves on both sides, and the second lever includes a second connecting rod and a second positioning block extending from the second connecting rod. The second positioning block cooperates with the second positioning groove, so that when the second lever is inserted into the second guide groove, the position between the second lever and the second small slider is stabilized by the cooperation between the second positioning block and the second positioning groove.

[0011] Preferably, a third guide slope is provided on the side of the second guide groove near the second slider insert, a second guide block is provided between the two second positioning blocks, and a fourth guide slope is provided on one side of the second guide block to cooperate with the third guide slope, thereby pushing the second small slider to slide.

[0012] Preferably, a second spring is provided between the second small slider and the second slider insert, so that when the second lever disengages from the second small slider, the second small slider is reset by the action of the second spring.

[0013] The beneficial effects of this invention are as follows: By driving the lever on the telescopic plate to precisely engage with the guide groove on the small slider, the insert pin is stably extended during the injection filling stage to position the metal insert, and is promptly retracted before the holding pressure begins. This ensures that the molten plastic completely fills the space left after the insert pin retracts, thus ensuring the accurate positioning of the metal insert and preventing its displacement or deformation. It also completely avoids the problems of traditional static inserts, which leave holes on the product surface and expose the metal insert due to the pin remaining in the cavity. The device has an ingenious structural design. Through the inclined engagement of the lever and the guide groove, along with the spring reset mechanism, it ensures the reliability and repeatability of the insert pin's movement. Furthermore, it can adapt to the synchronous positioning requirements of multi-directional, multi-position inserts in complex molds, effectively improving the sealing performance, appearance quality, and electrical test pass rate of injection-molded products containing metal inserts, significantly increasing production yield and product reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the first small slider, the first insert, the second small slider, and the second insert of this utility model.

[0015] The components in the attached diagram are labeled as follows: 11. Drive source; 12. Telescopic plate; 13. First excavator; 14. Angled guide post; 15. Drive components; 2. First slider insert; 21. First small slider; 211. First guide groove; 212. First positioning groove; 213. First guide slope; 22. First insert pin; 23. First spring; 3. First slide; 4. Second slider insert; 41. Second small slider; 411. Second guide groove; 412. Second positioning groove; 413. Third guide slope; 42. Second insert pin; 43. Second spring; 5. Second slide; 6. First lever block; 61. First connecting rod; 62. First positioning block; 63. Second guide ramp; 7. Second lever; 71. Second connecting rod; 72. Second positioning block. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0023] Example: refer to Figures 1-3 A needle extraction device for preventing exposed inserts in an injection mold includes: a first slider insert 2 and a second slider insert 4 arranged opposite to each other; a first slide block 3 is connected to the side of the first slider insert 2 away from the second slider insert 4; a second slide block 5 is connected to the side of the second slider insert 4 away from the first slider insert 2; the first slider insert 2 is slidable by the first slide block 3, and the second slider insert 4 is slidable by the second slide block 5. The first slider insert 2 and the second slider insert 4 are respectively slidably fitted with a first insert pin 22 and a second insert pin 42. The ends of the first insert pin 22 and the second insert pin 42 that are far apart from each other are respectively connected to a first small slider 21 and a second small slider 41. The first small slider 21 is slidably fitted with a first slide block 3, and the second small slider 41 is slidably fitted with a second slide block 5. The first insert pin 22 and the second insert pin 42 extend into or retract from the mold cavity as the first small slider 21 and the second small slider 41 move, thereby enabling the first insert pin 22 and the second insert pin 42 to be upgraded from traditional static insert pins to dynamic insert pins. Through precise time control, the insert pins are removed at the moment when the plastic has not yet solidified but the filling has been completed. This ensures the stability of the position of the metal insert and avoids leaving holes after injection molding, thus exposing the metal insert part. It also includes a drive source 11 fixedly installed on the upper mold. The head of the drive source 11 can be a hydraulic cylinder. The drive source 11 is connected to a telescopic plate 12. The telescopic plate 12 is provided with a first deflector 6 and a second deflector 7 facing the first small slider 21 and the second small slider 41, respectively. Under the control of the drive source 11, the first deflector 6 is inserted into the first small slider 21 to push the first small slider 21 to slide, and the second deflector 7 is inserted into the second small slider 41 to push the second small slider 41 to slide, thereby controlling the first insert pin 22 and the second insert pin 42 to extend into or exit the mold cavity.

[0024] refer to Figure 1 and Figure 2 To control the first slide block 3 and the second slide block 5 to move closer or further apart, the upper mold is connected to a first shovel 13 and a second shovel. The first shovel 13 cooperates with the first slide block 3 to push the position of the first slide block 3. A drive component 15 is connected to one side of the first slide block 3. The drive component 15 can be a hydraulic cylinder. The drive component 15 can be installed on the outside of the mold. When the mold is opened, the first slide block 3 can be reset by the drive component 15, or the position of the first slide block 3 can be further stabilized when the mold is closed. The second shovel (not shown in the figure) cooperates with the second slide block 5 to push the position of the second slide block 5. The upper mold is also bolted to a mounting plate. An inclined guide post 14 is installed on the mounting plate. The second slide block 5 has an inclined hole that cooperates with the inclined guide post 14. So when the mold is closed, the second slide block 5 can move towards the second slide block 5 through the inclined guide post 14, and when the mold is opened, the second slide block 5 can move away from the second slide block 5. In order to achieve timing control, the first slider insert 2 and the second slider insert 4 can be moved into place first under the action of the first shovel 13 and the second shovel. Then, under the action of the drive source 11, the first insert pin 22 and the second insert pin 42 are inserted into or removed from the mold cavity by the first dial block 6 and the second dial block 7 to stabilize the position of the metal insert or remove it from the metal insert.

[0025] refer to Figures 1-3The first small slider 21 has a first guide groove 211. One end of the first lever 6 cooperates with the first guide groove 211, so that when the first lever 6 is inserted into the first guide groove 211, the cooperation with the first guide groove 211 pushes the first small slider 21 to slide in the first slide block 3. The first guide groove 211 has first positioning grooves 212 on both sides. The first lever 6 includes a first connecting rod 61 and a first positioning block 62 extending from the first connecting rod 61. The first positioning block 62 cooperates with the first positioning groove 212, so that when the first lever 6 is inserted into the first guide groove 211, the position between the first lever 6 and the first small slider 21 is stabilized by the first positioning block 62 and the first positioning groove 212. A first guide slope 213 is formed on the side of the first guide groove 211 near the first slider insert 2. A first guide block extends between the two first positioning blocks 62. A second guide slope 63 is formed on one side of the first guide block, which cooperates with the first guide slope 213. Thus, when the first push block 6 is inserted into the first guide groove 211, the first small slider 21 is pushed to slide through the cooperation of the second guide slope 63 and the first guide slope 213, thereby pushing the first insert pin 22 to move. A first spring 23 abuts against the first small slider 21 and the first slider insert 2. Thus, when the first push block 6 disengages from the first small slider 21, the first small slider 21 is reset under the action of the first spring 23. To ensure the stability of the position of the first spring 23, a spring groove can be formed on the side of the first small slider 21, and one end of the first spring 23 abuts in the spring groove.

[0026] refer to Figures 1-3The second small slider 41 has a second guide groove 411. One end of the second lever 7 cooperates with the second guide groove 411, so that when the second lever 7 is inserted into the second guide groove 411, the cooperation with the second guide groove 411 pushes the second small slider 41 to slide in the second slide block 5. The second guide groove 411 has second positioning grooves 412 on both sides. The second lever 7 includes a second connecting rod 71 and a second positioning block 72 extending from the second connecting rod 71. The second positioning block 72 cooperates with the second positioning groove 412, so that when the second lever 7 is inserted into the second guide groove 411, the cooperation between the second positioning block 72 and the second positioning groove 412 stabilizes the position between the second lever 7 and the second small slider 41. A third guide slope 413 is provided on the side of the second guide groove 411 near the second slider insert 4. A second guide block is provided between the two second positioning blocks 72. A fourth guide slope that cooperates with the third guide slope 413 is provided on one side of the second guide block. Thus, when the second push block 7 is inserted into the second guide groove 411, the cooperation between the fourth guide slope and the third guide slope 413 pushes the second small slider 41 to slide, thereby pushing the second insert pin 42 to move. A second spring 43 abuts against the second small slider 41 and the second slider insert. Thus, when the second push block 7 disengages from the second small slider 41, the second small slider 41 is reset under the action of the second spring 43. To ensure the stability of the position of the second spring 43, a spring groove can be provided on the side of the second small slider 41, and one end of the second spring 43 abuts in the spring groove.

[0027] Movement Process: When the mold closes, the upper mold drives the first shovel 13, the second shovel, and the inclined guide post 14 to move towards the first slide block 3 and the second slide block 5, bringing the first slide block 3 and the second slide block 5 closer together. After the first slide block 3 and the second slide block 5 are in place, under the action of the drive source 11, the first lever 6 and the second lever 7 are respectively inserted into the first guide groove 211 of the first small slider 21 and the second guide groove 411 of the second small slider 41, thereby forcing the first small slider 21 and the second small slider 41 to move closer together, thus controlling... The first insert 22 and the second insert 42 extend into the mold cavity. Under the control of the PLC system and with the cooperation of the first spring 23 and the second spring 43, through precise time control, at the moment when the plastic has not yet solidified but filling has been completed, the first lever 6 and / or the second lever 7 disengage from the first small slider 21 and / or the second small slider 41, causing the first insert 22 and / or the second insert 42 to retract. This ensures the stability of the metal insert position and avoids leaving holes after injection molding, thus exposing the metal insert.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A needle extraction device for injection molds to prevent exposed inserts, characterized in that, include: A drive source (11) is fixedly installed on the upper mold; A first slider insert (2) and a second slider insert (4) are arranged opposite to each other. The side of the first slider insert (2) away from the second slider insert (4) is connected to a first slide block (3), and the side of the second slider insert (4) away from the first slider insert (2) is connected to a second slide block (5). The first slider insert (2) and the second slider insert (4) are respectively slidably fitted with a first insert (22) and a second insert (42). The ends of the first insert (22) and the second insert (42) that are far apart from each other are respectively connected to a first small slider (21) and a second small slider (41). The first small slider (21) is slidably fitted with a first slide block (3), and the second small slider (41) is slidably fitted with a second slide block (5). The first insert (22) and the second insert (42) extend into or exit the mold cavity as the first small slider (21) and the second small slider (41) move. The drive source (11) is connected to a telescopic plate (12). The telescopic plate (12) is provided with a first lever (6) and a second lever (7) facing the first small slider (21) and the second small slider (41), respectively. The first lever (6) is used to push the first small slider (21) to slide, and the second lever (7) is used to push the second small slider (41) to slide.

2. The injection mold needle extraction device for preventing exposed inserts according to claim 1, characterized in that: The first small slider (21) is provided with a first guide groove (211), and one end of the first push block (6) cooperates with the first guide groove (211). When the first push block (6) is inserted into the first guide groove (211), it cooperates with the first guide groove (211) to push the first small slider (21) to slide in the first slide block (3).

3. The injection mold needle extraction device for preventing exposed inserts according to claim 2, characterized in that: The first guide groove (211) has a first positioning groove (212) on both sides. The first lever (6) includes a first connecting rod (61) and a first positioning block (62) extending from the first connecting rod (61). The first positioning block (62) cooperates with the first positioning groove (212), so that when the first lever (6) is inserted into the first guide groove (211), the position between the first lever (6) and the first small slider (21) is stabilized by the cooperation between the first positioning block (62) and the first positioning groove (212).

4. The injection mold pin extraction device for preventing exposed inserts according to claim 3, characterized in that: The first guide groove (211) has a first guide slope (213) on the side near the first slider insert (2), and a first guide block is provided between the two first positioning blocks (62). A second guide slope (63) that cooperates with the first guide slope (213) is provided on one side of the first guide block, thereby pushing the first small slider (21) to slide.

5. A needle extraction device for preventing exposed inserts in injection molds according to claim 4, characterized in that: A first spring (23) is provided between the first small slider (21) and the first slider insert (2), so that when the first toggle block (6) disengages from the first small slider (21), the first small slider (21) is reset under the action of the first spring (23).

6. The injection mold needle extraction device for preventing exposed inserts according to claim 1, characterized in that: The second small slider (41) is provided with a second guide groove (411), and one end of the second push block (7) cooperates with the second guide groove (411). When the second push block (7) is inserted into the second guide groove (411), the cooperation with the second guide groove (411) pushes the second small slider (41) to slide in the second slide block (5).

7. A needle extraction device for preventing exposed inserts in injection molds according to claim 6, characterized in that: The second guide groove (411) has a second positioning groove (412) on both sides. The second lever (7) includes a second connecting rod (71) and a second positioning block (72) extending from the second connecting rod (71). The second positioning block (72) cooperates with the second positioning groove (412), so that when the second lever (7) is inserted into the second guide groove (411), the position between the second lever (7) and the second small slider (41) is stabilized by the cooperation between the second positioning block (72) and the second positioning groove (412).

8. A needle extraction device for preventing exposed inserts in injection molds according to claim 7, characterized in that: The second guide groove (411) has a third guide slope (413) on the side near the second slider insert (4), and a second guide block is provided between the two second positioning blocks (72). A fourth guide slope that cooperates with the third guide slope (413) is provided on one side of the second guide block, thereby pushing the second small slider (41) to slide.

9. A needle extraction device for preventing exposed inserts in injection molds according to claim 8, characterized in that: A second spring (43) is provided between the second small slider (41) and the second slider insert, so that when the second toggle block (7) disengages from the second small slider (41), the second small slider (41) is reset under the action of the second spring (43).

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