Double-color forming equipment for motor brush carrier

Abstract

The utility model provides double-color forming equipment for a motor brush carrier, and belongs to the technical field of motor manufacturing. According to the utility model, the turntable with the plurality of movable molds and the fixed mold are arranged on the injection molding machine, each movable mold comprises the primary injection molding movable mold and the secondary injection molding movable mold, the fixed mold comprises the primary injection molding fixed mold and the secondary injection molding fixed mold, the terminal insert is placed in the mold cavity of the primary injection molding movable mold of one movable mold, and the terminal insert is placed in the mold cavity of the secondary injection molding movable mold of the other movable mold. When a primary molded product is placed in the secondary injection molding movable mold and the movable mold is transferred to correspond to the fixed mold by the turntable to realize mold closing injection molding, primary injection molding and secondary injection molding can be realized at the same time, and the primary molded product and the secondary molded product can be obtained at the same time; in the injection molding process, blanking of a secondary injection molding product, transferring of a primary molding product and presetting of a terminal insert are achieved through the other movable mold, the requirement for rotation of the rotating disc is met, the movable mold is sequentially matched with the fixed mold to complete primary injection molding and secondary injection molding at the same time, the machining efficiency is improved, the manufacturing cost is reduced, and large-scale production and manufacturing are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, specifically to a two-color forming equipment for motor brush holders. Background Technology

[0002] In some existing small motors, such as automotive window regulator motors, sealing rings are installed between the motor brush holder and the motor's metal housing, as well as between the brush holder and the gearbox, to achieve waterproof sealing. For example, patent CN207835239U discloses a motor brush holder with a sealing function, which is positioned between the gearbox and the motor housing and includes a brush holder body and a soft rubber body. During assembly, the upper and lower sides of the brush holder body respectively contact the motor housing and the gearbox, and the soft rubber body is placed at these contact points. The brush holder body has a soft rubber body receiving groove and small through holes on the upper and lower sides. The soft rubber body is made of a malleable thermoplastic elastomer. This soft rubber body serves as a sealant for the upper and lower sides of the brush holder body, eliminating the need for additional sealants and facilitating assembly and subsequent disassembly.

[0003] Although the existing motor brush holders described above achieve a unified structure between the brush body and the soft rubber body after injection molding, the industry typically uses different colors for differentiation and employs a two-stage injection molding process. Specifically, there are two sets of processing and molding equipment: one for primary injection molding and the other for secondary injection molding. In the primary injection molding, a mold with a core-pulling structure is designed. During processing, the terminal insert is embedded into the cavity of the primary mold on one set of molding equipment, and then rigid rubber is injected to form the brush holder body with small holes and soft rubber receiving grooves, serving as the primary molded product. The resulting primary molded product is then manually transferred to the cavity of the secondary mold on the other set of processing and molding equipment, where soft rubber is injected to form the soft rubber body on the primary molded product, serving as the secondary molded product. Finally, the secondary molded product is manually removed from the secondary mold, completing the injection molding process. Although the above-mentioned equipment can meet the processing requirements, at least two pieces of equipment need to be set up at the same time to complete the task. Two sets of controllers, hydraulic cylinders and other structures are also required to meet the operating requirements. The equipment cost is high. In addition, manual handling of intermediate products is required, which is time-consuming and labor-intensive and not conducive to the large-scale production of products. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, this invention aims to provide a dual-color molding device for motor brush holders. This device features several sets of moving molds on a turntable, each including a primary injection mold and a secondary injection mold. Simultaneously, a fixed mold is positioned above the turntable. During turntable rotation, the fixed mold sequentially engages with each set of moving molds. The fixed mold includes a primary injection mold corresponding to the primary injection mold and a secondary injection mold corresponding to the secondary injection mold. This allows for simultaneous primary and secondary injection molding during mold closing, resulting in primary and secondary molded products. After being transferred out via the turntable, the primary molded product is transferred to the cavity of the secondary injection mold, where a terminal insert is embedded. Mold closing and injection molding are then performed again, completing both primary and secondary injection molding processes. This process is repeated, enabling simultaneous primary and secondary injection molding operations on the same machine. This results in higher equipment utilization, lower costs, and eliminates the need for manual handling of intermediate products, saving time and labor, and facilitating large-scale production.

[0005] The specific technical solution is as follows:

[0006] A two-color molding device for motor brush holders includes an injection molding machine, characterized in that the injection molding machine includes a moving mold fixing plate and a fixed mold fixing plate, which move closer to or further away from each other; it also includes a turntable, several sets of moving molds, and a fixed mold. The turntable is rotatably mounted on the injection molding machine, and several moving mold fixing plates are evenly distributed in a circular array on the turntable. Each moving mold fixing plate is equipped with a set of moving molds, and each set of moving molds includes a primary injection moving mold and a secondary injection moving mold. The fixed mold is set on the fixed mold fixing plate, and the fixed mold includes a primary injection fixed mold that cooperates with the primary injection moving mold and a secondary injection fixed mold that cooperates with the secondary injection moving mold. The primary injection fixed mold and the secondary injection fixed mold are each equipped with a nozzle, and when the turntable rotates, the several sets of moving molds pass through the fixed mold in sequence and close with the fixed mold.

[0007] The aforementioned two-color forming equipment for motor brush holders also includes a robotic gripper, which is positioned beside the turntable.

[0008] The aforementioned motor brush holder dual-color molding equipment includes two sets of moving molds on the turntable. The two sets of moving molds are symmetrically arranged on the turntable, and when the turntable stops after rotating a predetermined angle, the fixed mold is located above and directly opposite one set of moving molds, and the robot gripper is located beside the other set of moving molds.

[0009] In the aforementioned motor brush holder dual-color molding equipment, the primary injection molds on the two sets of moving molds are arranged symmetrically with respect to the axis of the turntable, and the secondary injection molds on the two sets of moving molds are arranged symmetrically with respect to the axis of the turntable.

[0010] The aforementioned motor brush holder dual-color molding equipment further includes a terminal insert feeding station and a dropping station, which are respectively located on both sides of the robot gripper.

[0011] In the aforementioned two-color forming equipment for motor brush holders, a toothed ring is provided on the outer wall of the turntable.

[0012] The aforementioned motor brush holder dual-color molding equipment includes a fixed mold comprising a fixed mold body and a fixed template. The fixed mold body is mounted on a fixed mold fixing plate, and the fixed template is detached and mounted on the fixed mold body. Two fixed templates are provided, forming a primary injection mold and a secondary injection mold, respectively. Simultaneously, each set of moving molds includes a moving mold body and a moving template. The moving mold body is mounted on a corresponding moving mold fixing plate, and the moving template is detached and mounted on the moving mold body. Two moving templates are provided, forming a primary injection moving mold and a secondary injection moving mold, respectively.

[0013] In the aforementioned motor brush holder dual-color forming equipment, a positioning structure is provided between the fixed template and the corresponding moving template. The positioning structure includes a protrusion and a groove, and the protrusion and the groove are respectively provided on the opposite side of the fixed template and the corresponding moving template.

[0014] The positive effects of the above technical solution are:

[0015] The aforementioned dual-color molding equipment for motor brush holders utilizes a turntable mounted on an injection molding machine. Several sets of moving molds are installed on the turntable, each including a primary injection mold and a secondary injection mold. Simultaneously, fixed molds are provided to sequentially cooperate with each moving mold, including primary injection fixed molds and secondary injection fixed molds corresponding to the primary and secondary injection moving molds, respectively. This allows for simultaneous primary and secondary injection molding during mold closing, producing both primary and secondary molded products. When the turntable rotates and aligns another moving mold with a fixed mold, the primary molded product is transferred to the cavity of the secondary injection moving mold of that moving mold. A terminal insert is then embedded in the cavity of the primary injection moving mold, followed by mold closing and injection molding again, completing the primary and secondary injection molding process. This process is repeated continuously to continuously produce secondary molded products. This allows for simultaneous primary and secondary injection molding operations on the same machine, improving equipment utilization, reducing operating costs, and eliminating the need for manual handling of intermediate products, saving time and labor, and meeting the needs of large-scale product manufacturing. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of a two-color molding device for a motor brush holder according to the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of the moving mold on the turntable according to a preferred embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation of the fixed mold according to a preferred embodiment of the present invention.

[0019] In the attached diagram: 1. Turntable; 11. Moving mold fixing plate; 12. Gear ring; 2. Moving mold; 21. Primary injection moving mold; 22. Secondary injection moving mold; 23. Protrusion; 3. Fixed mold; 31. Primary injection fixed mold; 32. Secondary injection fixed mold; 33. Nozzle; 34. Insert groove; 4. Fixed mold fixing plate; 5. Robot gripper. Detailed Implementation

[0020] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 3 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0021] Figure 1 This is a structural diagram of an embodiment of a two-color molding device for motor brush holders according to this utility model. Figure 1 As shown, the dual-color molding equipment for motor brush holders provided in this embodiment includes an injection molding machine, which includes a moving mold fixing plate 11 and a fixed mold fixing plate 4 to facilitate the subsequent installation of the moving mold 2 and the fixed mold 3. At this time, the moving mold fixing plate 11 and the fixed mold fixing plate 4 move closer or further apart, providing conditions for subsequent mold closing and opening. In addition, the dual-color molding equipment for motor brush holders provided in this embodiment also includes a turntable 1, several sets of moving molds 2 and fixed molds 3, and a robot gripper 5, which work together to complete the processing.

[0022] Figure 2 This is a schematic diagram of the installation of the moving mold on the turntable according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the installation of the fixed mold according to a preferred embodiment of the present invention. Figures 1 to 3As shown, a turntable 1 is rotatably mounted on an injection molding machine. Several moving mold fixing plates 11 are evenly distributed in a circular array on the turntable 1, and a set of moving molds 2 is mounted on each moving mold fixing plate 11. When the turntable 1 rotates, each set of moving molds 2 moves to a predetermined position and cooperates with the fixed mold 3 at that position to complete the mold closing and injection molding. At this time, each set of moving molds 2 includes a primary injection moving mold 21 and a secondary injection moving mold 22, providing the condition for simultaneously completing the primary and secondary injection molding during subsequent mold closing injection molding. Meanwhile, the fixed mold 3 is set on a fixed mold fixing plate 4, allowing the fixed mold 3 to move closer to or further away from each set of moving molds 2. Furthermore, the fixed mold 3 includes a primary injection fixed mold 31 that cooperates with the primary injection moving mold 21 and a secondary injection fixed mold 32 that cooperates with the secondary injection moving mold 22. That is, when the fixed mold 3 and one of the moving molds 2 are closed, the primary injection fixed mold 31 on it can close with the corresponding primary injection moving mold 21 on the moving mold 2, and the secondary injection fixed mold 32 can close with the corresponding secondary injection moving mold 22 on the moving mold 2. In other words, primary and secondary injection can be completed simultaneously when the injection molding machine closes the mold in one operation, thereby obtaining both primary and secondary molded products at the same time, improving processing efficiency, and avoiding the problem of needing multiple injection molding machines to complete primary and secondary injection separately, thus reducing costs. In addition, the fixed mold 3, the primary injection fixed mold 31 and the secondary injection fixed mold 32 are each equipped with a sprue 33, which allows primary and secondary injection to be performed separately through the corresponding sprue 33, meeting independent injection requirements, avoiding mutual interference, and ensuring the quality of primary and secondary molded products during injection molding. In addition, when the turntable 1 rotates, several sets of moving molds 2 pass through the fixed mold 3 in sequence and close with the fixed mold 3. This allows other moving molds 2 to perform loading and unloading operations and transfer intermediate products while one set of moving molds 2 is closing with the fixed mold 3 for injection molding, reducing process intervals and further improving processing efficiency.

[0023] Specifically, the robot gripper 5 is positioned beside the turntable 1. The robot gripper 5 picks up the secondary molded product obtained from the secondary injection mold 22 and removes the primary molded product from the primary injection mold 21 and places it into the secondary injection mold 22 of the same mold 2. Then, the terminal insert is embedded into the cavity of the corresponding primary injection mold 21. The mold 2 is then transferred to the next injection molding process with the top mold under the action of the turntable 1. This process satisfies the requirements for finished product unloading, intermediate product transfer, and pre-positioning of terminal inserts without the need for manual operation, saving time and effort.

[0024] In a preferred embodiment, two sets of moving molds 2 are provided on the turntable 1. These two sets of moving molds 2 are symmetrically arranged on the turntable 1, meaning that the turntable 1 temporarily stops after rotating 180° each time. During this temporary stop, one set of moving molds 2 cooperates with the fixed mold 3 to complete injection molding, while the other set of moving molds 2 is positioned away from the fixed mold 3. This provides more operating space for loading and unloading materials and transferring intermediate products from the moving mold 2 located away from the fixed mold 3, resulting in a more rational structural arrangement. Furthermore, when the turntable 1 stops after rotating a predetermined angle, the fixed mold 3 is positioned above and directly opposite one set of moving molds 2, ensuring smooth mold closing with one set of moving molds 2 when the fixed mold 3 presses down. Additionally, the robot gripper 5 is positioned beside the other set of moving molds 2, allowing the robot gripper 5 to be away from the fixed mold 3, thus avoiding the need for the robot gripper 5 to...

[0025] More specifically, the primary injection moving molds 21 on the two sets of moving molds 2 are arranged symmetrically with respect to the axis of the turntable 1. Similarly, the secondary injection moving molds 22 on the two sets of moving molds 2 are arranged symmetrically with respect to the axis of the turntable 1. That is, after the turntable 1 rotates 180°, the primary injection moving molds 21 and the primary injection fixed molds 31 on the moving molds 2 can always be aligned, while the secondary injection moving molds 22 and the secondary injection fixed molds 32 are aligned, avoiding misalignment and ensuring the smooth progress of primary and secondary injection.

[0026] More specifically, the injection molding machine is also equipped with a terminal insert loading station and a unloading station. The terminal insert loading station and the unloading station are respectively located on both sides of the robot gripper 5, so that the terminal insert loading station can automatically transfer the terminal insert to the area that the robot gripper 5 can grasp. The robot gripper 5 can then grasp the delivered terminal insert and transfer it to the cavity of the primary injection mold 21 of one of the moving molds 2. The secondary molded product obtained by injection molding can then be transferred to the unloading station by the robot gripper 5 to realize the unloading of the finished product.

[0027] More specifically, a gear ring 12 is provided on the outer wall of the turntable 1, making the turntable 1 itself a gear structure. It can be driven by the input gear, and can also be limited by the gear ring 12 and the limiting teeth, etc., to ensure the stability of the turntable 1 during injection molding, loading and unloading, and intermediate product transfer. The structural design is more reasonable.

[0028] More specifically, the fixed mold 3 is further divided into the fixed mold 3 body and the fixed mold 3 plate. During installation, the fixed mold 3 body is installed on the fixed mold fixing plate 4, and the fixed mold 3 plate is disassembled and installed on the fixed mold 3 body. At this time, there are two fixed mold 3 plates, which respectively form a primary injection mold 31 and a secondary injection mold 32, so that the fixed mold 3 plate on the fixed mold 3 body can be replaced, thereby allowing the primary injection mold 31 and the secondary injection mold 32 of the fixed mold 3 to be replaced according to the usage requirements. Similarly, each set of moving mold 2 is divided into a moving mold 2 body and a moving mold 2 plate. The moving mold 2 body is installed on the corresponding moving mold fixing plate 11, and the moving mold 2 plate is disassembled and installed on the moving mold 2 body. At this time, there are two moving mold 2 plates, which respectively form a primary injection moving mold 21 and a secondary injection moving mold 22. This allows the moving mold 2 plates on the moving mold 2 body of each set of moving mold 2 to be replaced. Similarly, the primary injection moving mold 21 and the secondary injection moving mold 22 of the moving mold 2 can be replaced according to the usage requirements. The structure is more flexible and meets the injection molding requirements of products of different specifications. There is no need to replace the entire mold, which reduces the processing cost.

[0029] More specifically, a positioning structure is provided between the fixed mold plate 3 and the corresponding moving mold plate 2. This positioning structure includes a protrusion 23 and a groove 34. Furthermore, the groove 34 and the protrusion 23 are respectively positioned on opposite sides of the fixed mold plate 3 and the corresponding moving mold plate 2. This allows the protrusion 23 on the moving mold plate 2 to embed into the groove 34 on the fixed mold plate 3 during injection molding, achieving proper engagement and ensuring accurate positioning and stability after mold closing. This results in a more rational structural design.

[0030] The dual-color molding equipment for motor brush holders provided in this embodiment includes an injection molding machine. A turntable 1 with several moving molds 2 and a fixed mold 3 are set on the injection molding machine. When the turntable 1 rotates, the moving molds 2 can sequentially engage with the fixed mold 3. Each moving mold 2 includes a primary injection moving mold 21 and a secondary injection moving mold 22, while the fixed mold 3 includes a primary injection fixed mold 31 and a secondary injection fixed mold 32. A terminal insert is placed in the cavity of the primary injection moving mold 21 of the primary moving mold 2, and a primary molding insert is placed in the secondary injection moving mold 22. When the rotating platen 1 transfers the moving mold 2 to correspond with the fixed mold 3 to achieve mold closing and injection molding, it can simultaneously perform primary and secondary injection molding operations, and obtain primary and secondary molded products at the same time. During this injection molding process, the other moving mold 2 realizes the unloading of secondary injection molded products, the transfer of primary molded products, and the pre-positioning of terminal inserts. It satisfies the requirement that the rotating platen 1 rotates so that the moving mold 2 can cooperate with the fixed mold 3 in sequence to complete primary and secondary injection molding at the same time, which improves processing efficiency, reduces manufacturing costs, and is conducive to large-scale production manufacturing.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-color molding equipment for motor brush holders, comprising an injection molding machine, characterized in that, The injection molding machine includes a moving mold fixing plate and a fixed mold fixing plate, which move closer to or further away from each other. It also includes a turntable, several sets of moving molds, and a fixed mold. The turntable is rotatably mounted on the injection molding machine. Several moving mold fixing plates are evenly distributed in a circular array on the turntable. Each moving mold fixing plate has a set of moving molds mounted on it. Each set of moving molds includes a primary injection moving mold and a secondary injection moving mold. The fixed mold is disposed on the fixed mold fixing plate. The fixed mold includes a primary injection fixed mold that cooperates with the primary injection moving mold and a secondary injection fixed mold that cooperates with the secondary injection moving mold. The primary and secondary injection fixed molds are each equipped with a nozzle. When the turntable rotates, the several sets of moving molds sequentially pass through the fixed mold and close with it.

2. The motor brush holder dual-color molding equipment according to claim 1, characterized in that, It also includes a robotic gripper, which is positioned beside the turntable.

3. The motor brush holder dual-color molding equipment according to claim 2, characterized in that, The turntable has two sets of moving molds, which are symmetrically arranged on the turntable. When the turntable stops after rotating a predetermined angle, the fixed mold is located above and directly opposite one set of moving molds, and the robot gripper is located beside the other set of moving molds.

4. The motor brush holder dual-color molding equipment according to claim 3, characterized in that, The primary injection molds on the two sets of moving molds are arranged symmetrically about the axis of the turntable, and the secondary injection molds on the two sets of moving molds are arranged symmetrically about the axis of the turntable.

5. The motor brush holder dual-color molding equipment according to claim 2, characterized in that, It also includes a terminal insert loading station and a unloading station, which are respectively located on both sides of the robot gripper.

6. The motor brush holder dual-color molding equipment according to claim 1, characterized in that, A toothed ring is provided on the outer wall of the turntable.

7. The motor brush holder dual-color molding equipment according to claim 1, characterized in that, The fixed mold includes a fixed mold body and a fixed template. The fixed mold body is mounted on the fixed mold fixing plate, and the fixed template is detachably mounted on the fixed mold body. Two fixed templates are provided, forming the primary injection fixed mold and the secondary injection fixed mold, respectively. Meanwhile, each set of moving molds includes a moving mold body and a moving template. The moving mold body is mounted on the corresponding moving mold fixing plate, and the moving template is detachably mounted on the moving mold body. Two moving templates are provided, forming the primary injection moving mold and the secondary injection moving mold, respectively.

8. The motor brush holder dual-color molding equipment according to claim 7, characterized in that, A positioning structure is provided between the fixed template and the corresponding moving template. The positioning structure includes a protrusion and a groove, and the protrusion and the groove are respectively disposed on opposite sides of the fixed template and the corresponding moving template.

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