Positioning mechanism for multi-layer insert pre-injection molding of wiring board supporting assembly

Abstract

The utility model relates to a positioning mechanism for multi-layer insert pre-injection molding of a wiring board supporting assembly, which belongs to the technical field of insert pre-injection molding and comprises a wiring board support, and first-time pre-injection molding plastic comprises a second insert plastic body and a fifth insert plastic body which are formed by wrapping plastic on the side surfaces, the upper surfaces and the lower surfaces of a second insert and a fifth insert; on the premise of not changing the structure of the product plastic and the multi-layer insert, the first-time pre-injection-molded plastic is added, through the protrusions, the grooves and the positioning grooves of the second insert plastic body and the fifth insert plastic body, the first-time injection-molded plastic and the second-time pre-injection-molded plastic are added, the first-time injection-molded plastic and the second-time injection-molded plastic are added, and the multi-layer insert and the multi-layer insert are integrated. The inserts are prevented from being punched and deformed by plastic flow in the injection molding process, the gap between the upper and lower inserts is guaranteed, and the yield of products is improved. The situation that metal chips are generated in the insert placing process is reduced, and the risk of short circuit in electrical measurement of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of insert pre-injection molding, in particular to a positioning mechanism for multi-layer insert pre-injection molding of a wiring board support assembly. Background Art

[0002] The wiring board support assembly, an important component in the motor, plays a role in connecting circuits. Through a varying number of wiring pins at the outer end, it connects the physical connection holes between various circuits in the motor, thereby transmitting the correct electrical signals and delivering current. The purpose of the wiring board support assembly determines that its parts need to have good electrical performance and prevent current short circuits. Therefore, precise control of the position of the internal inserts is required to ensure that the distance between adjacent inserts is sufficient to avoid short circuits under the maximum voltage and maximum current conditions. The main body of the wiring board support assembly consists of multiple layers of inserts and plastic. In the injection molding process, molten plastic is injected into the mold to wrap the inserts and form parts. Due to the electrical properties of the product itself, it is necessary to position the inserts during the injection molding process to prevent the inserts from being deformed and displaced by the flow of plastic, resulting in a smaller distance between adjacent inserts and thus causing poor electrical test results. The current product structure mainly positions the insert terminals or positioning holes on the mold.

[0003] The wiring board support assembly consists of multiple inserts and plastic, and most of the inserts are arranged in upper and lower layers. For such arranged inserts, only the exposed terminal pins are limited and fixed, resulting in too high a short-circuit risk for the injection-molded products.

[0004] For example, in the existing patent, an insert positioning structure for a wiring board support assembly in CN202323125831.5 is to open positioning holes on the inserts, and the diameters of the positioning holes of adjacent upper and lower layers of inserts decrease. This insert positioning method using positioning holes has requirements for the distance between the holes. If the distance between the positioning holes is too far, there will be no support and limitation for the middle insert, resulting in deformation during the injection molding process. Currently, the distance between the positioning dowel pins basically needs to be maintained between 20 mm and 30 mm.

[0005] Secondly, after opening holes on the insert plane, it is necessary to widen the width of the insert and the plastic to ensure the conductive cross-sectional area of the insert. However, after widening the insert and the plastic, it is necessary to change the inner diameter of the product, which may lead to insufficient space during the assembly process and thus the situation where it cannot be assembled. Summary of the Utility Model

[0006] The utility model aims to solve the above technical problems and provides a positioning mechanism for multi-layer insert pre-injection molding of a wiring board support assembly.

[0007] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0008] A positioning mechanism for multi-layer insert pre-injection molding of a wiring board support assembly, including a wiring board support, and the wiring board support assembly is composed of first pre-injected plastic, second injected plastic, and multi-layer inserts;

[0009] The multi-layer inserts include insert three, insert two, insert five, and insert four;

[0010] The first pre-injected plastic includes the side surfaces, upper and lower surfaces of insert two and insert five wrapped with plastic to form an insert two plastic body and an insert five plastic body;

[0011] The upper ends of the insert two plastic body and the insert five plastic body are protrusions, the lower end of the insert two plastic body is provided with a groove, and the lower end of the insert five plastic body is provided with a positioning groove that matches the protrusion on the insert two plastic body;

[0012] The outside of the multi-layer inserts, the insert two plastic body, and the insert five plastic body is filled with plastic to form the second injected plastic.

[0013] Preferably, the insert three, insert two, insert five, and insert four are stacked in sequence.

[0014] Preferably, the thickness of the protrusion is 1 mm.

[0015] Preferably, the protrusions are arranged in multiple groups.

[0016] Preferably, at least two groups of the multiple groups of protrusions have different shapes.

[0017] Preferably, plastic support ribs are installed on the second injected plastic.

[0018] Preferably, terminal connection holes are provided on the insert three, insert two, insert five, and insert four.

[0019] Preferably, the protrusion on the insert two plastic body is embedded in the positioning groove so that the insert two and the insert five are stacked.

[0020] After adopting the above structure, the utility model has the following advantages:

[0021] Without changing the structure of the product plastic and multi-layer inserts, the utility model adds the first pre-injected plastic. Through the protrusions, grooves, and positioning grooves of the insert two plastic body and the insert five plastic body, it prevents the inserts from being deformed by the flow of plastic during the injection molding process, ensures the gap between the upper and lower layers of inserts, and improves the yield rate of the product. It reduces the generation of metal chips during the insert placement process and reduces the risk of electrical short-circuit testing of the product.

[0022] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will become readily apparent by reference to the accompanying drawings and the following detailed description. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is a schematic structural diagram of the support of the wiring board of the present utility model;

[0026] Figure 3 is a schematic cross-sectional view of the present utility model;

[0027] Figure 4 is a schematic diagram of the convex structure of the insert two plastic body of the present utility model;

[0028] Figure 5 is a schematic diagram of the groove structure of the two plastic bodies of the present utility model;

[0029] Figure 6 is a schematic diagram of the arrangement of the multi-layer inserts of the present utility model.

[0030] As shown in the figure: 1. Second injection molded plastic; 2. Insert two; 3. Insert three; 4. Insert four; 5. Insert five; 6. Insert two plastic body; 7. Insert five plastic body. Detailed Embodiments

[0031] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] The following further elaborates on the present utility model in detail in conjunction with the full text.

[0034] Combined with the attached Figures 1-6 , a positioning mechanism for multi-layer insert pre-injection molding of a wiring board support assembly, including a wiring board support. The wiring board support assembly is composed of a first pre-injected plastic, a second injection plastic 1, and multi-layer inserts.

[0035] When the present utility model is specifically implemented, as Figure 2 and Figure 6 shown, the multi-layer inserts include insert three 3, insert two 2, insert five 5, and insert four 4. Insert three 3, insert two 2, insert five 5, and insert four 4 are stacked in sequence. The four types of inserts are stacked, with insert three 3 at the bottom layer, and insert two 2, insert five 5, and insert four 4 are placed in sequence.

[0036] Specifically, the first pre-injected plastic includes the side surfaces and the upper and lower surfaces of insert two 2 and insert five 5 wrapped with plastic to form insert two plastic body 6 and insert five plastic body 7. Protrusions on insert two plastic body 6 are embedded in the positioning grooves so that insert two 2 and insert five 5 are stacked.

[0037] The upper ends of insert two plastic body 6 and insert five plastic body 7 are protrusions. The lower end of insert two plastic body 6 is provided with a groove, and the lower end of insert five plastic body 7 is provided with a positioning groove that matches the protrusion on insert two plastic body 6;

[0038] When the present utility model is specifically implemented, as Figure 2 Figure 4 , Figure 5 and Figure 6 shown, the outer sides of the multi-layer inserts, insert two plastic body 6, and insert five plastic body 7 are filled with plastic to form the second injection plastic 1. The second injection plastic 1 is wrapped with plastic during injection molding, leaving the outer terminal pins to be connected to other motor components to provide a circuit path. The multi-layer inserts of insert three 3, insert two 2, insert five 5, and insert four 4 all have short terminals and long terminals. Terminal connection holes are provided on the short terminals of insert three 3, insert two 2, insert five 5, and insert four 4, which are connected to other motor components to provide a circuit path.

[0039] When the present utility model is specifically implemented, as Figures 2-6 shown, in order to solve the problems of the need for support in the hierarchical arrangement of multi-layer inserts and to avoid position deviation caused by deformation due to being washed by plastic during the injection molding process, a primary pre-injection molding is first performed on the intermediate layer insert, so that the side surfaces and partial upper and lower surfaces of insert two 2 and insert five 5 are wrapped with plastic (forming insert two plastic body 6 and insert five plastic body 7), and the thickness of the protrusion is 1 mm. During the placement process, the lower surface of insert 2, insert two plastic body 6 presses against the bottom layer insert, and the plastic on the upper surface of insert two plastic body 6 supports the upper layer insert, thus avoiding the deformation of the insert affected by the plastic flow during the secondary injection molding process, which may lead to too small a distance between the upper and lower layers of inserts and thus poor electrical testing. In addition, the protrusions are arranged in multiple groups. At least two groups of the multiple groups of protrusions have different shapes. The protrusion shapes of insert two plastic body 6 of the insert are different. There are several rectangular 1 mm high convex bumps protruding on one surface, and there are grooves of a similar shape at the corresponding positions on the other surface. The protrusions on insert two plastic body 6 are embedded in the positioning grooves to stack insert two 2 and insert five 5. The upper and lower layers of inserts can be position-limited through this design structure to prevent incorrect placement deviation.

[0040] Plastic support ribs are installed on the second injection molded plastic 1. Specifically, the plastic support ribs play a role in supporting the first pre-injection molded plastic to prevent the first pre-injection molded plastic from deforming during the injection molding.

[0041] Embodiment 1:

[0042] A multi-layer insert pre-injection molding positioning method for a wiring board support assembly. In order to prevent the insert from deforming during injection molding, without changing the original structural characteristics of the product, insert two plastic body 6 and insert five plastic body 7 formed by wrapping the side surfaces and upper and lower surfaces of insert two 2 and insert five 5 with plastic are used, so that the side walls and upper and lower surfaces are wrapped with plastic, which plays a supporting role in the subsequent overall injection molding process. Through the design of the protrusion and groove shape structures of insert two plastic body 6 and insert five plastic body 7, the protrusions are arranged in 7 groups, and the shape of 1 group of protrusions is different from that of the other 6 groups. The thickness of the protrusion is 1 mm, which plays an anti-mistake role during the placement of the insert in the secondary injection molding.

[0043] Embodiment 2:

[0044] The utility model provides a positioning structure for multi-layer insert pre-injection molding of a wiring board support assembly. The sub-parts formed by the wiring board support assembly are multi-layer inserts made of plastic and metal materials. The multi-layer inserts are arranged in a staggered layer between products. Insert three 3 is at the bottom layer, and insert two 2, insert five 5, and insert four 4 are placed in sequence. First, the side surfaces and the upper and lower surfaces of insert two 2 and insert five 5 are wrapped with plastic to form insert two plastic body 6 and insert five plastic body 7. The protrusions on insert two plastic body 6 are embedded in the positioning grooves so that insert two 2 and insert five 5 are stacked, enabling an additional pre-injection molding for the middle insert, and making insert two plastic body 6 and insert five plastic body 7 wrap around partial insert two 2 and insert five 5. Through mold design, the shapes of insert two plastic body 6 and insert five plastic body 7 are adjusted, and bosses are designed. The height of the bosses is consistent with the spacing of the finished inserts. In the subsequent second injection of plastic 1, first place the bottom insert three 3, and then place the inserts that have been pre-injected with plastic for the first time in sequence. Insert four 4 is at the uppermost end, and the inserts are supported by plastic bosses to ensure the spacing. The outside is filled with plastic to form the second injection of plastic 1. After the injection molding is completed, plastic is filled between adjacent inserts, and there are pins of metal inserts on the outside of the plastic, which are used for welding or plugging, so that the inserts are connected to other components in the motor, thereby transmitting the correct electrical signals and conveying current.

[0045] The above describes the present utility model and its implementation manners. Such description is not restrictive, and only one of the implementation manners of the present utility model is shown throughout the text. The actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A multi-layer insert pre-injection positioning mechanism for a wiring board support assembly, characterized in that: It comprises a wiring board support, wherein the wiring board support assembly is composed of a first pre-injection plastic, a second injection plastic (1) and a multi-layer insert; The multi-layer insert includes insert three (3), insert two (2), insert five (5) and insert four (4); The first pre-injection plastic includes the side surfaces and upper and lower surfaces of the insert 2 (2) and the insert 5 (5) wrapped with plastic to form the insert 2 plastic body (6) and the insert 5 plastic body (7); The upper ends of the second insert plastic body (6) and the fifth insert plastic body (7) are protrusions, the lower end of the second insert plastic body (6) is provided with a groove, and the lower end of the fifth insert plastic body (7) is provided with a positioning groove that matches the protrusion on the second insert plastic body (6); The outer sides of the multi-layer insert, the second insert plastic body (6) and the fifth insert plastic body (7) are filled with plastic to form a second injection molded plastic (1).

2. A multi-layer insert pre-injection positioning mechanism for a wiring board support assembly according to claim 1, characterized in that: The insert three (3), insert two (2), insert five (5) and insert four (4) are stacked in sequence.

3. The positioning mechanism for pre-molding a multi-layer insert of a wiring board support assembly according to claim 1, characterized in that: The thickness of the protrusion is 1 mm.

4. The multi-layer insert pre-injection positioning mechanism of the wiring board support assembly according to claim 1, characterized in that: The protrusions are arranged in multiple groups.

5. A multi-layer insert pre-injection positioning mechanism for a wiring board support assembly according to claim 4, characterized in that: At least two groups of the plurality of groups of protrusions have different shapes.

6. The multi-layer insert pre-injection positioning mechanism of the wiring board support assembly according to claim 1, characterized in that: Plastic supporting ribs are installed on the second injection plastic.

7. The multi-layer insert pre-injection positioning mechanism of the wiring board support assembly according to claim 1, characterized in that: The insert three (3), the insert two (2), the insert five (5) and the insert four (4) are all provided with terminal connection holes.

8. The multi-layer insert pre-injection positioning mechanism of the wiring board support assembly according to claim 1, characterized in that: The protrusion on the plastic body (6) of the second insert is embedded in the positioning groove so that the second insert (2) and the fifth insert (5) are stacked and placed.

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