An insert positioning mechanism

Abstract

The utility model relates to the technical field of insert injection moulding, and particularly relates to an insert positioning mechanism, which comprises a mould body and a positioning piece, a cavity assembly is arranged on the closing end face of the mould body, the cavity assembly comprises an injection cavity and a first positioning groove that are connected in communication, the positioning piece is embedded in the first positioning groove, and a second positioning groove that is in communication with the injection cavity is arranged on the positioning piece. The utility model adds the cavity assembly on the mould body, the positioning piece is positioned and placed by the first positioning groove of the cavity assembly, the second positioning groove on the positioning piece is used to embed the insert, and the part that needs to be wrapped by plastic is located in the injection cavity. The positioning piece can effectively limit the movement of the insert, and when facing inserts with different shapes, the positioning of the insert in the injection cavity can be completed by only replacing the positioning piece with the corresponding second positioning groove, thereby reducing the cost of mould opening.

Description

Technical Field

[0001] This utility model relates to the field of insert injection molding technology, and in particular to an insert positioning mechanism. Background Technology

[0002] Insert injection molding is a process in which prefabricated metal or non-metal parts are embedded into a mold cavity and then encapsulated with molten plastic to achieve a unified structure of heterogeneous materials. Currently, mainstream production uses automated robotic arms to complete the insert pre-positioning process. While the initial positioning accuracy of the inserts meets process requirements, during the molten plastic filling stage, the inserts are prone to displacement due to the influence of fluid flow and the shrinkage of the molten plastic during molding. This results in the relative positional tolerance of the inserts in the final product exceeding the design tolerance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an insert positioning mechanism that can prevent the insert from shifting.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an insert positioning mechanism, including a mold body and a positioning component; the mold body has a cavity assembly on its mold closing end face, the cavity assembly including a communicating injection cavity and a first positioning groove;

[0005] The positioning element is embedded in the first positioning groove, and the positioning element is provided with a second positioning groove that communicates with the injection cavity.

[0006] Furthermore, the aforementioned insert positioning mechanism also includes an ejector pin. The mold body has a through hole, and the positioning member has a positioning hole that connects the through hole and the second positioning groove respectively. The ejector pin includes a pusher head that is slidably disposed on the through hole, and the pusher head can pass through the positioning hole and extend into the second positioning groove.

[0007] Furthermore, the ejector pin also includes a slider and a spring, the slider being movably disposed within the through hole, and the spring being disposed between the slider and the ejector pin.

[0008] Furthermore, the end of the perforation away from the positioning element is a first threaded hole, and the slider is threadedly connected to the first threaded hole.

[0009] Furthermore, the top holding end of the top head has a rounded structure.

[0010] Furthermore, the bottom of the positioning component is provided with a second threaded hole, and the bottom of the mold body is provided with an assembly hole communicating with the second threaded hole.

[0011] Furthermore, the positioning member is provided with a positioning part located at the bottom of the second positioning groove.

[0012] Furthermore, the positioning element and the first positioning groove are overfitted together.

[0013] Furthermore, the first positioning groove has a frustum-shaped cavity structure, and the opening of the first positioning groove is a large-sized end;

[0014] The positioning element has a frustum-like structure, with the top of the positioning element being a large-sized end.

[0015] The beneficial effects of this invention are as follows: a cavity assembly is added to the mold body, and a positioning element is positioned by the first positioning groove of the cavity assembly. The insert, through the second positioning groove on the positioning element, positions the part to be encased in plastic within the injection cavity. Using a positioning element to position the insert not only effectively restricts the movement of the insert, but also allows for easy positioning of inserts in the injection cavity by simply replacing the positioning element with the corresponding second positioning groove, thus reducing mold opening costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an insert positioning mechanism proposed in this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the insert positioning mechanism proposed in this utility model, showing the insert placement state.

[0018] Figure 3 This is a cross-sectional structural diagram of the insert positioning mechanism proposed in this utility model in the insert-free state.

[0019] Label Explanation:

[0020] 1. Mold body; 11. Cavity assembly; 111. Injection cavity; 112. First positioning groove;

[0021] 12. Through hole; 121. First threaded hole;

[0022] 13. Assembly holes;

[0023] 2. Positioning component; 21. Second positioning groove; 22. Positioning hole; 23. Second threaded hole; 24. Positioning part;

[0024] 3. Ejector pin; 31. Ejector head; 32. Slider; 33. Spring;

[0025] 4. Inserts. Detailed Implementation

[0026] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] Please refer to Figures 1 to 3As shown, the present invention provides an insert positioning mechanism, including a mold body 1 and a positioning component 2; the mold body 1 has a cavity assembly 11 on its mold closing end face, the cavity assembly 11 includes an injection cavity 111 and a first positioning groove 112 connected to each other; the positioning component 2 is embedded in the first positioning groove 112, and the positioning component 2 has a second positioning groove 21 connected to the injection cavity 111.

[0028] Working principle: The positioning element 2 is positioned by the first positioning groove 112, and the insert 4 is positioned in the injection cavity 111 by the second positioning groove 21 on the positioning element 2, so that the part to be wrapped by plastic is located. Using the positioning element 2 to position the insert 4 can not only effectively restrict the movement of the insert 4, but also, when faced with inserts 4 of different shapes, only the positioning element 2 with the corresponding second positioning groove 21 needs to be replaced to complete the positioning of the insert 4 in the injection cavity 111, thereby reducing the mold opening cost.

[0029] It is worth noting that when injection molding a semi-contour insert 4, the part of the insert 4 that does not need to be covered by plastic is positioned in the second positioning groove 21 for positioning; when injection molding a full-contour insert 4, within the allowable range, a part of the insert 4 is positioned in the second positioning groove 21 for positioning.

[0030] In some implementations, please refer to Figure 2 and Figure 3 As shown, an insert positioning mechanism further includes an ejector pin 3. The mold body 1 has a through hole 12, and the positioning member 2 has a positioning hole 22 that connects the through hole 12 and the second positioning groove 21 respectively. The ejector pin 3 includes a pusher head 31 that is slidably disposed on the through hole 12. The pusher head 31 can pass through the positioning hole 22 and extend into the second positioning groove 21. By using the pusher head 31 of the ejector pin 3 to hold the insert 4, the stability of the insert 4 on the second positioning groove 21 can be further improved.

[0031] In some implementations, please refer to Figure 2 and Figure 3 As shown, the ejector pin 3 also includes a slider 32 and a spring 33. The slider 32 is movably disposed within the through hole 12, and the spring 33 is disposed between the slider 32 and the ejector head 31. The spring 33 enables the ejector head 31 to automatically hold the insert 4. By moving the position of the slider 32 on the through hole 12, the elastic force applied by the spring 33 to the ejector head 31 can be adjusted.

[0032] In some implementations, please refer to Figure 2 and Figure 3As shown, the end of the through hole 12 away from the positioning member 2 is a first threaded hole 121, and the slider 32 is threadedly connected to the first threaded hole 121. By threading the slider 32 to the first threaded hole 121, it is possible not only to control the magnitude of the spring force of the spring 33, but also to prevent the slider 32 from moving within the through hole 12 without human intervention.

[0033] In some implementations, please refer to Figure 2 and Figure 3 As shown, the top holding end of the top head 31 has a rounded structure. The top head 31 adopts a rounded structure so that the top head 31 can be pushed open by the insert 4 during the process of the insert 4 entering the second positioning groove 21.

[0034] In some implementations, please refer to Figure 2 and Figure 3 As shown, the bottom of the positioning component 2 is provided with a second threaded hole 23, and the bottom of the mold body 1 is provided with an assembly hole 13 communicating with the second threaded hole 23. Since the positioning component 2 is an externally added object that enters the mold body 1, if the positioning component 2 is not accurately placed in the first positioning groove 112, it will affect the molding effect of the subsequent plastic entering the injection cavity 111. Therefore, after the positioning component 2 is placed into the first positioning groove 112, it is threaded through the assembly hole 13 by a bolt and threadedly connected to the second threaded hole 23. The force generated by the threaded connection is used to correct the position of the positioning component 2 in the first positioning groove 112.

[0035] In some implementations, please refer to Figure 2 and Figure 3 As shown, the positioning member 2 is provided with a positioning part 24 located at the bottom of the second positioning groove 21. The positioning part 24 ensures the positioning accuracy of the insert 4 in the second positioning groove 21.

[0036] In some embodiments, the positioning element 2 and the first positioning groove 112 are overfitted. The overfitting of the positioning element 2 not only ensures the positional accuracy of the second positioning groove 21, but also facilitates the assembly of the positioning element 2 on the mold body 1.

[0037] In some embodiments, the first positioning groove 112 has a frustum-shaped cavity structure, with the groove opening being the larger end; the positioning member 2 has a frustum-shaped structure, with the top of the positioning member 2 being the larger end. The frustum-shaped cavity structure of the first positioning groove 112 and the frustum-shaped structure of the positioning member 2 facilitate the assembly of the positioning member 2 into the first positioning groove 112. The above descriptions are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the description and drawings of this utility model, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An insert positioning mechanism, characterized in that: It includes a mold body and a positioning component; the mold body has a cavity assembly on its closing end face, the cavity assembly including a communicating injection cavity and a first positioning groove; The positioning element is embedded in the first positioning groove, and the positioning element is provided with a second positioning groove that communicates with the injection cavity.

2. The insert positioning mechanism according to claim 1, characterized in that: It also includes an ejector pin, the mold body has a through hole, the positioning component has a positioning hole that connects the through hole and the second positioning groove, and the ejector pin includes a pusher head that is slidably disposed on the through hole, the pusher head being able to pass through the positioning hole and extend into the second positioning groove.

3. The insert positioning mechanism according to claim 2, characterized in that: The ejector pin also includes a slider and a spring, the slider being movably disposed within the through hole, and the spring being disposed between the slider and the ejector pin.

4. The insert positioning mechanism according to claim 3, characterized in that: The end of the perforation away from the positioning element is a first threaded hole, and the slider is threadedly connected to the first threaded hole.

5. The insert positioning mechanism according to claim 2, characterized in that: The top end of the top head has a rounded structure.

6. The insert positioning mechanism according to claim 1, characterized in that: The bottom of the positioning component is provided with a second threaded hole, and the bottom of the mold body is provided with an assembly hole that communicates with the second threaded hole.

7. The insert positioning mechanism according to claim 1, characterized in that: The positioning component is provided with a positioning part located at the bottom of the second positioning groove.

8. The insert positioning mechanism according to claim 1, characterized in that: The positioning element and the first positioning groove are overfitted together.

9. The insert positioning mechanism according to claim 1, characterized in that: The first positioning groove has a frustum-shaped cavity structure, and the opening of the first positioning groove is the large-sized end; The positioning element has a frustum-like structure, with the top of the positioning element being a large-sized end.

Images