Injection mold for motor connector

Abstract

The utility model discloses an injection mold for a motor connector in the field of motor connectors, which comprises a front mold and a rear mold, a plurality of thrusting components are arranged in the front mold, each thrusting component comprises an elastic piece, an insert pin and a punch, one end of each insert pin is abutted against the elastic piece, and the elastic piece and the insert pin are sleeved on the outer side of the punch; before the front mold and the rear mold are closed, the end of the punch is located in the insert pin, and after the front mold and the rear mold are closed, the insert pin moves in the direction close to the elastic piece, so that the punch is exposed out of the insert pin, and a connecting piece of the copper bar is punched off. According to the utility model, the problem that the injection molding positioning difficulty is increased because the copper bar needs to be mounted in a mold for multiple times when the existing plastic part is subjected to injection molding is solved, and compared with the traditional copper bar which needs to be mounted and positioned for multiple times, the copper bar only needs to be mounted and positioned once, and the plastic part is subjected to injection molding after the joint is punched off during mold closing; the required effect is achieved, the size precision of product positioning is effectively guaranteed, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor connectors, in particular to an injection mold for a motor connector. Background Art

[0002] Motor connectors, a vital component in modern industry, are exquisitely designed and powerful. Motor connectors are devices used to connect motors to power sources or other electrical equipment. They can convert electrical energy or other energy sources into mechanical energy and are used as a power source for many devices and machines. In the complex electrical systems inside or outside the motor, copper bars play a key role in current transmission. Copper bars transmit current in the electrical system inside or outside the motor, and motor connectors are the connection points between these copper bars and the motor or power supply. The connectors are connected to the copper bars through terminals to ensure that the current can be safely and effectively transmitted to the windings of the motor to drive the motor to work.

[0003] A plastic part usually needs to be injected on the outside of the copper busbar. When the existing plastic parts are injected, the copper busbars have different shapes and sizes and need to be accurately positioned in the mold, so they often need to be installed and adjusted multiple times, which not only increases the difficulty of injection molding positioning, but also may lead to reduced production efficiency. In addition, due to differences in assembly techniques and the influence of human factors, the copper busbars may have problems such as deviation or warping during the injection molding process, which in turn affects the positioning accuracy and overall quality of the final product.

[0004] The above defects need to be solved urgently. Utility Model Content

[0005] In order to solve the problem that when conventional plastic parts are injected, the copper bar needs to be installed in the mold for multiple times, which increases the difficulty of injection molding positioning, the utility model provides an injection mold for a motor connector.

[0006] The technical solution of the utility model is as follows:

[0007] An injection mold for a motor connector, comprising a front mold and a rear mold, wherein a plurality of punching components are arranged in the front mold, each of the punching components comprises an elastic member, an inserting pin, and a punch, one end of the inserting pin abuts against the elastic member, and the elastic member and the inserting pin are both sleeved on the outside of the punch;

[0008] Before the front mold and the rear mold are closed, the end of the punch is located in the insert pin. When the front mold and the rear mold are closed, the insert pin moves toward the elastic member so that the punch exposes the insert pin and punches out the connector of the copper bar.

[0009] According to the utility model of the above scheme, the punching assembly also includes a pressing block, one end of the elastic member away from the inserting pin abuts against the pressing block, and one end of the punch away from the inserting pin is connected to the pressing block.

[0010] According to the above-mentioned solution of the utility model, a receiving groove for receiving the elastic member is provided at the bottom of the pressing block.

[0011] According to the above-mentioned solution of the utility model, the insert pin includes an insert pin head and an insert pin tail, and the insert pin head abuts against the elastic member.

[0012] According to the above-mentioned scheme of the utility model, the front mold is provided with a first mounting hole and a second mounting hole which are interconnected, and the aperture of the first mounting hole is larger than the aperture of the second mounting hole, so that an annular table surface is formed between the first mounting hole and the second mounting hole, and the pin head is located in the first mounting hole, and before the front mold and the rear mold are closed, the pin head overlaps the annular table surface.

[0013] According to the utility model of the above scheme, the rear die is provided with residue drop wells corresponding one to one with the punching components.

[0014] According to the utility model of the above scheme, the aperture of the residue discharge well gradually increases from the end close to the front mold to the end away from the front mold.

[0015] According to the utility model of the above scheme, a first placement groove is provided on the front mold, and a second placement groove is provided on the rear mold. After the front mold and the rear mold are closed, an injection cavity for placing the copper bar for injection molding is formed between the first placement groove and the second placement groove.

[0016] The utility model according to the above solution further comprises a nozzle arranged on the front mold, and a flow channel is arranged inside the nozzle.

[0017] According to the utility model of the above scheme, a latent glue port is provided at one end of the nozzle, and the latent glue port is communicated with the flow channel.

[0018] The utility model according to the above scheme has the following beneficial effects:

[0019] In the above-mentioned injection mold for the motor connector, before the front mold and the rear mold are molded together, the integral copper bar is placed between the front mold and the rear mold. When the front mold and the rear mold are molded together, the insert pin moves in the direction close to the elastic part so that the punch exposes the insert pin and punches off the connector of the copper bar to ensure that the copper bar can be separated and positioned. Compared with the traditional copper bar that needs to be installed and positioned multiple times, the copper bar of the utility model only needs to be installed and positioned once. When the mold is closed, the connection is punched off and then the plastic part is injected to achieve the desired effect, effectively ensuring the dimensional precision of the product positioning, improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is one of the cross-sectional views of the utility model;

[0022] Figure 3 for Figure 2 A magnified view of part A;

[0023] Figure 4 This is the second cross-sectional view of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the punching component before mold closing;

[0025] Figure 6 It is a schematic diagram of the structure of the punching component after mold closing;

[0026] Figure 7 This is a schematic diagram of the structure of the completed plastic parts injection molding;

[0027] Figure 8 This is a disassembled diagram of the plastic parts and copper busbars;

[0028] Fig. 9 for Figure 8 Magnified view of part B.

[0029] In the figure, 1, front mold; 11, punching assembly; 111, elastic part; 112, insert pin; 1121, insert pin head; 1122, insert pin tail; 113, punch; 114, pressing block; 1141, receiving groove; 12, annular table; 13, nozzle; 14, flow channel; 15, latent glue port; 2, rear mold; 21, residue drop well; 3, copper busbar; 31, copper busbar unit; 32, connecting part; 321, weak part; 322, groove; 4, plastic part. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] like Figure 1 As shown, the utility model provides an injection mold for a motor connector, including a front mold 1 and a rear mold 2, wherein the front mold 1 is provided with a first placement groove, and the rear mold 2 is provided with a second placement groove. After the front mold 1 and the rear mold 2 are molded together, an injection cavity is formed between the first placement groove and the second placement groove, and the injection cavity is used to place the copper bus 3 for injection molding, so that the plastic part 4 is integrally molded on the surface of the copper bus 3. After the injection molding process starts, the molten plastic is injected into the injection cavity, rapidly cooled and solidified on the surface of the copper bus 3, forming a solid plastic layer, so that the plastic part 4 is more tightly combined with the copper bus 3, without additional connectors 32 or gaps. In addition, integrated molding reduces errors that may occur during assembly, such as alignment problems or loose fasteners. In addition, since the plastic part 4 has been integrated with the copper bus 3, only the positioning and fixation of the copper bus 3 need to be paid attention to during installation, which simplifies the installation steps.

[0032] like Figure 7 , Figure 8 As shown, in this embodiment, the copper bar 3 includes a plurality of copper bar units 31, and a connector 32 is provided between two adjacent copper bar units 31, and the plurality of copper bar units 31 and the connector 32 are an integrally formed structure. In addition, a weak portion 321 is provided on the connector 32 to ensure that the force can be concentrated on the weak portion 321 when the mold is closed, so that the connection between the copper bar units 31 can be quickly and accurately disconnected, which can not only simplify the operation process and improve work efficiency, but also ensure the accuracy of separation and meet production requirements. In addition, by providing the weak portion 321, it is possible to accurately control where the copper bar 3 breaks, and ensure the consistency and accuracy of the product size.

[0033] like Figures 7 to 9 As shown, in this embodiment, grooves 322 are provided on both the upper and lower sides of the weak portion 321, which can increase the surface area of ​​the breaking point, making the punching process of the connector 323 more uniform and controllable, and the presence of the grooves 322 helps to accurately control the breaking of the weak portion 321, ensuring that the copper bus 3 is separated at a predetermined position, thereby ensuring the consistency of size. In addition, the design of the grooves 322 makes the punching process simpler, and the grooves 322 can guide the breaking along a predetermined path, reducing the complex requirements for the mold. In addition, the grooves 322 help control the breaking, so that the punching step in the production process can be completed faster, thereby improving the overall production speed.

[0034] like Figures 2 to 6As shown, in this embodiment, a plurality of punching components 11 are arranged in the front mold 1. The punching components 11 correspond to the connecting pieces 32 on the copper bar 3 one by one. Each punching component 11 includes an elastic member 111, an inserting pin 112, and a punch 113. One end of the inserting pin 112 abuts against the elastic member 111, and the elastic member 111 and the inserting pin 112 are both sleeved on the outside of the punch 113, so that the inserting pin 112 can flexibly expand and contract under the action of the elastic member 111. In addition, the integral copper bar 3 is placed on the second placement groove of the rear mold 2. Before the front mold 1 and the rear mold 2 are closed, the inserting pin 112 is exposed from the front mold 1 under the action of the elastic member 111. At the same time, the inserting pin 112 presses the connecting piece 32 of the copper bar 3 to ensure that the copper bar 3 will not be loosened or displaced due to vibration or other reasons during the injection molding process, and the end of the punch 113 is located in the inserting pin 112. After the front mold 1 and the rear mold 2 are molded together, the insert pin 112 is squeezed, so that the insert pin 112 moves toward the elastic member 111, and the punch 113 originally hidden inside the insert pin 112 is gradually exposed, and its sharp end directly points to the connector 32 of the copper bar 3. As the mold closing action continues, the punch 113 will accurately break the connector 32 of the copper bar 3, thereby achieving the separation and positioning of the copper bar 3. Compared with the traditional copper bar 3 that needs to be installed and positioned multiple times, the copper bar 3 of the utility model only needs to be installed and positioned once, and the connection is punched out during the mold closing and then the plastic part 4 is injected to achieve the desired effect, effectively ensure the dimensional precision of the product positioning, improve production efficiency, and reduce production costs.

[0035] like Figures 2 to 6As shown, in this embodiment, the punching assembly 11 also includes a pressing block 114, and one end of the elastic member 111 away from the insert pin 112 abuts against the pressing block 114 to ensure that the elastic member 111 can evenly transmit force when under pressure. At the same time, one end of the punch 113 away from the insert pin 112 is connected to the pressing block 114 to ensure that the punch 113 can obtain sufficient support and stability when punching the connector 32 of the copper bar 3. When the front mold 1 and the rear mold 2 are molded together, the insert pin 112 will be squeezed by the rear mold 2, and the pressing block 114 will also exert a certain force on the elastic member 111 and the punch 113, so that the insert pin 112 moves in the direction close to the elastic member 111, and the punch 113 gradually exposes the insert pin 112. When the tip of the punch 113 contacts the connector 32 of the copper bar 3, the punch 113 can punch the connector 32 to achieve the separation and positioning of the copper bar 3. The presence of the pressing block 114 not only enhances the structural stability of the punching assembly 11, but also makes the punching process more reliable and accurate. In addition, a receiving groove 1141 for accommodating the elastic member 111 is provided at the bottom of the pressing block 114, ensuring that the elastic member 111 can transmit force evenly and stably when under pressure, while also making the punching assembly 11 more compact and precise as a whole. When the front mold 1 and the rear mold 2 are closed, the insert pin 112 will be squeezed by the rear mold 2, and the pressing block 114 will also exert a certain force on the elastic member 111 and the punch 113. Since the elastic member 111 is accommodated in the receiving groove 1141 of the pressing block 114, the elastic member 111 can deform more evenly when under pressure, thereby ensuring that the punch 113 can accurately punch the connector 32 of the copper busbar 3. Secondly, the design of the accommodating groove 1141 also allows the elastic member 111 to quickly return to its original state after deformation, so as to be ready for the next punching operation, thereby improving the durability of the punching assembly 11 and ensuring the stability and reliability of the injection mold.

[0036] like Figures 2 to 3 As shown, in this embodiment, the insert pin 112 includes a head portion of the insert pin 112 and a tail portion of the insert pin 112, and the head portion of the insert pin 112 abuts against the elastic member 111. The front mold 1 is provided with a first mounting hole and a second mounting hole that are interconnected, and the aperture of the first mounting hole is larger than the aperture of the second mounting hole, so that an annular table 12 is formed between the first mounting hole and the second mounting hole, and the head portion of the insert pin 112 is located in the first mounting hole. When the mold is in an open state, that is, the front mold 1 and the rear mold 2 have not yet been molded together, the head portion of the insert pin 112 will overlap on the annular table 12, and the annular table 12 provides a temporary support point for the insert pin 112, thereby limiting the position of the insert pin 112.

[0037] like Figures 2 to 3As shown, in this embodiment, the rear mold 2 is provided with a residue drop well 21 corresponding to the punching assembly 11. The residue drop well 21 can effectively collect the copper busbar connector residue generated during the punching process, keep the inside of the mold clean, and make the maintenance and cleaning of the mold more convenient. The operator can regularly clean the residue drop well 21 to ensure the smooth operation of the mold. In addition, from the end close to the front mold 1 to the end away from the front mold 1, the aperture of the residue drop well 21 gradually increases, so that the residue can flow more smoothly during the blanking process, reducing the possibility of blockage, thereby improving the residue collection efficiency. At the same time, the residue drop well 21 with a gradually increasing aperture makes it easier to clean the residue.

[0038] like Figures 2 to 4 As shown, in this embodiment, a nozzle 13 is provided on the front mold 1. The nozzle 13 is also called a sprue sleeve or a sprue sleeve. It is an important component connecting the injection molding machine nozzle and the mold runner 14. The main function of the nozzle 13 is to guide the plastic melt from the injection molding machine nozzle to the runner 14 system of the mold. In addition, a runner 14 is provided inside the nozzle 13. The runner 14 is the main channel for the plastic melt to enter the mold cavity from the nozzle 13. A reasonable design of the runner 14 can reduce the flow resistance of the plastic melt, improve the filling speed and filling effect, and thus obtain a high-quality injection molded product. In addition, a latent glue port 15 is provided at one end of the nozzle 13. The latent glue port 15 is connected to the runner 14. When the front mold 1 and the rear mold 2 are molded, the latent glue port 15 is located between the front mold 1 and the rear mold 2 to form an injection cavity, so that the plastic melt is injected on the surface of the copper bar 3, ensuring the precise position and high-quality molding of the plastic part 4 on the copper bar 3.

[0039] When the utility model is used, the front mold 1 and the rear mold 2 are first opened, and then the integral copper bar 3 is placed in the second accommodating cavity of the rear mold 2, and then the front mold 1 and the rear mold 2 are closed, and the insert pin 112 is squeezed, so that the insert pin 112 moves toward the direction close to the elastic member 111, so that the punch 113 inside the insert pin 112 is gradually exposed, and its sharp end directly points to the weak part 321 of the connecting piece 32 of the copper bar 3. As the closing action continues, the punch 113 will accurately break the connecting piece 32 of the copper bar 3, and realize the separation and positioning of the copper bar 3. At the same time, the plastic melt in the injection molding machine flows into the injection molding cavity from the nozzle 13 and the latent glue port 15, so that the plastic part 4 is molded on the surface of the copper bar 3. Finally, after the injection molding of the plastic part 4 is completed, the front mold 1 and the rear mold 2 are opened, and the ejector assembly in the rear mold 2 ejects the copper bar 3 and the plastic part 4, thereby completing the injection molding of the plastic part 4.

[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0041] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An injection mold for a motor connector, comprising a front mold and a rear mold, characterized in that: A plurality of punching components are arranged in the front die, each of which comprises an elastic member, an inserting pin and a punch, one end of the inserting pin abuts against the elastic member, and the elastic member and the inserting pin are both sleeved on the outside of the punch; Before the front mold and the rear mold are closed, the end of the punch is located in the insert pin. When the front mold and the rear mold are closed, the insert pin moves toward the elastic member so that the punch exposes the insert pin and punches out the connector of the copper bar.

2. The injection mold for a motor connector according to claim 1, characterized in that: The punching assembly also includes a pressing block, one end of the elastic member away from the inserting pin abuts against the pressing block, and one end of the punch away from the inserting pin is connected to the pressing block.

3. The injection mold for a motor connector according to claim 2, characterized in that: The bottom of the pressing block is provided with a receiving groove for receiving the elastic member.

4. The injection mold for a motor connector according to claim 1, characterized in that: The insert pin comprises an insert pin head and an insert pin tail, and the insert pin head is in contact with the elastic member.

5. The injection mold for a motor connector according to claim 4, characterized in that: The front mold is provided with a first mounting hole and a second mounting hole which are connected to each other. The aperture of the first mounting hole is larger than the aperture of the second mounting hole, so that an annular table surface is formed between the first mounting hole and the second mounting hole. The pin head is located in the first mounting hole, and before the front mold and the rear mold are closed, the pin head overlaps the annular table surface.

6. The injection mold for a motor connector according to claim 4, characterized in that: The rear die is provided with residue drop wells corresponding to the punching components one by one.

7. The injection mold for a motor connector according to claim 6, characterized in that: The aperture of the residue discharge well increases gradually from an end close to the front mold to an end away from the front mold.

8. The injection mold for a motor connector according to claim 1, characterized in that: The front mold is provided with a first placement groove, and the rear mold is provided with a second placement groove. After the front mold and the rear mold are closed, an injection cavity for placing the copper bar for injection molding is formed between the first placement groove and the second placement groove.

9. The injection mold for a motor connector according to claim 1, characterized in that: It also includes a nozzle arranged on the front mold, and a flow channel is arranged inside the nozzle.

10. The injection mold for a motor connector according to claim 9, characterized in that: One end of the nozzle is provided with a latent glue port, and the latent glue port is communicated with the flow channel.

Images