Rotary positioning mechanism of plastic injection molding device

Abstract

The utility model relates to the technical field of plastic injection molding devices, and particularly discloses a rotary positioning mechanism of a plastic injection molding device, which comprises a mold A and a mold B. The sides, far away from each other, of the mold A and the mold B are fixedly connected with connecting discs, and positioning structures are arranged on the surfaces of the mold A and the mold B. Each positioning structure comprises a frame A and two frames B, the surfaces of the mold A and the mold B are sleeved with the frames A and the frames B correspondingly, the two sides of the mold A are sleeved with the two frames B correspondingly, cylinders are fixedly connected to the surfaces of the mold A and the mold B correspondingly, bolts penetrate through the surfaces of the cylinders in a threaded mode, positioning rods are fixedly connected to the surfaces of the frames A, and supporting arms are fixedly connected to the surfaces of the frames B; one end, far away from the frame B, of the supporting arm is fixedly connected with a supporting plate. According to the utility model, the problem that the injection mold with a rotating angle is inconvenient to position is solved.

Description

Technical Field

[0001] This utility model relates to the field of plastic injection molding equipment technology, and in particular to a rotary positioning mechanism for a plastic injection molding equipment. Background Technology

[0002] A plastic injection molding machine is a mechanical device used to process plastic raw materials into plastic products. It typically consists of an injection system, a mold clamping system, a hydraulic system, and an electrical control system. For products with complex structures or requiring multi-color injection molding, a rotatable injection molding machine is needed. Rotatable injection molding machines can better achieve injection molding of different parts. For example, in multi-color injection molding, by rotating the mold, different colored plastic raw materials can be precisely injected into the corresponding positions, improving the appearance quality and color accuracy of the product.

[0003] The above-mentioned and existing technologies have the following drawbacks: The rotation mechanism of existing rotatable injection molds is usually quite complex, consisting of multiple parts such as rotating shafts, bearings, and gears. During long-term use, these parts will experience a decrease in rotational accuracy due to wear and deformation, which in turn affects the positioning accuracy of the mold. In the injection molding process, accurate mold closing and rotational positioning are crucial to the dimensional accuracy of the product. Without a positioning structure, the mold is prone to positional deviations during rotation and mold opening and closing, resulting in the dimensions of the injection molded product not matching the design dimensions, larger dimensional tolerances, and poor product consistency.

[0004] Therefore, a rotary positioning mechanism for a plastic injection molding device is proposed. Utility Model Content

[0005] The purpose of this invention is to address the inconvenience of positioning injection molds with varying rotation angles, and to propose a rotation positioning mechanism for plastic injection molding devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary positioning mechanism for a plastic injection molding device, comprising mold A and mold B, wherein connecting discs are fixedly connected to the sides of mold A and mold B that are away from each other, and positioning structures are provided on the surfaces of mold A and mold B, the positioning structures comprising frame A and two frames B, frame A and frame B respectively fitting onto the surfaces of mold A and mold B, the two frames B respectively fitting onto both sides of mold A, and cylinders are fixedly connected to the surfaces of mold A and mold B, with bolts threaded through the surfaces of the cylinders, a positioning rod fixedly connected to the surface of frame A, and a support arm fixedly connected to the surface of frame B, with a support plate fixedly connected to the end of the support arm away from frame B.

[0007] The effect achieved by the above components is as follows: by setting up a positioning structure, it is easy to position the mold A after the rotation angle, thereby avoiding deviation in fitting caused by excessive rotation angle, and thus improving the production quality of plastic injection molding.

[0008] Preferably, the arc surface of the positioning rod is fitted with a ring.

[0009] The effect achieved by the above components is that the movement of the positioning rod will cause the ring to slide along the surface of the protective pad, and the ring will rotate on its surface with the help of the force of the movement of the positioning rod, thereby reducing the friction of the positioning rod when it moves on the surface of the protective pad.

[0010] Preferably, a protective pad is bonded to the surface of the support plate, and the protective pad is made of rubber.

[0011] The effect achieved by the above components is that the protective pad on the surface of the support plate prevents the positioning rod from directly impacting the surface of the support plate, thus avoiding damage to the support plate and the positioning rod.

[0012] Preferably, a limiting plate is fixedly connected to the side of the frame A and the frame B that is far away from each other, and the cross-section of the limiting plate is "L" shaped.

[0013] The effect achieved by the above components is that frame A and frame B will respectively drive the limiting plate to slide along the surface of frame A and frame B, thereby restricting the movement path of frame A and frame B, so that frame A and frame B can be accurately fitted into the accurate position.

[0014] Preferably, one end of the bolt is fixedly connected to a turntable, and the arc surface of the turntable has several grooves.

[0015] The effect achieved by the above components is that the rotation of the turntable will cause the bolt to move, and the turntable facilitates the rotation of the bolt.

[0016] Preferably, both mold A and mold B have several circular grooves on their surfaces, and a circular plate is rotatably connected to the end of the bolt away from the turntable, the size of which is adapted to the size of the circular grooves.

[0017] The effect achieved by the above components is that the movement of the bolt will cause the circular plate to move closer to the groove. When the circular plate moves to the appropriate position, it will slide into the groove until it abuts against the groove, thereby improving the limiting effect of the bolt on frame A and frame B.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] 1. In this utility model, by setting a positioning structure, frames A and B are respectively fitted onto the surfaces of molds A and B. Then, bolts are used to fix frames A and B. At this time, mold A is driven to rotate. The rotation of mold A will drive the positioning rod to rotate. The rotation of the positioning rod will disengage from the surface of the support plate. Mold A will drive the positioning rod to move closer to the support plate on the other side. When the positioning rod is in contact with the surface of the support plate, the support plate will support the positioning rod, thereby positioning the rotated positioning rod, and then positioning the rotated mold B. This facilitates the positioning of mold A after the rotation angle, thereby avoiding deviations in the fit caused by excessive rotation angle, and thus improving the production quality of plastic injection molding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembly structure of this utility model;

[0022] Figure 3 This is a structural diagram of frame A and frame B of this utility model;

[0023] Figure 4 This is a schematic diagram of the cylindrical part of this utility model.

[0024] Legend: 1. Mold A; 2. Mold B; 3. Connecting plate; 4. Positioning structure; 401. Frame A; 402. Frame B; 403. Cylinder; 404. Bolt; 405. Positioning rod; 406. Support arm; 407. Support plate; 408. Ring; 409. Protective pad; 410. Limiting plate; 411. Turntable; 412. Groove; 413. Circular plate; 414. Circular slot. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] like Figure 1As shown, this utility model provides a rotary positioning mechanism for a plastic injection molding device, including mold A1 and mold B2. Connecting discs 3 are fixedly connected to the sides of mold A1 and mold B2 that are far apart from each other. Positioning structures 4 are provided on the surfaces of mold A1 and mold B2. Positioning structure 4 includes a frame A401 and two frames B402, which are respectively fitted onto the surfaces of mold A1 and mold B2. The two frames B402 are respectively fitted onto both sides of mold A1. Cylindrical cylinders 403 are fixedly connected to the surfaces of mold A1 and mold B2. Bolts 404 are threaded through the surface of the cylindrical cylinders 403. Positioning rods 405 are fixedly connected to the surface of frame A401, and support arms 406 are fixedly connected to the surface of frame B402. A support plate 407 is fixedly connected to the end of the support arm 406 that is far away from frame B402. By setting the positioning structure 4, it is possible to easily position the mold A1 after rotation, thereby avoiding deviations in fit caused by excessive rotation angle, and thus improving the production quality of plastic injection molding.

[0028] The specific settings and functions of its positioning structure 4 will be discussed below.

[0029] like Figure 2 and Figure 3 and Figure 4As shown, a ring 408 is fitted onto the arc surface of the positioning rod 405. When the positioning rod 405 moves, the ring 408 slides along the surface of the protective pad 409. The ring 408 rotates on the surface of the protective pad 409 with the force of the moving positioning rod 405, thus reducing the friction of the positioning rod 405 on the surface of the protective pad 409. A protective pad 409, made of rubber, is bonded to the surface of the support plate 407. The protective pad 409 on the surface of the support plate 407 prevents the positioning rod 405 from directly impacting the surface of the support plate 407, thus avoiding damage to both the support plate 407 and the positioning rod 405. Limiting plates 410 are fixedly connected to the opposite sides of frames A401 and B402. The cross-section of the limiting plates 410 is "L"-shaped. Frames A401 and B402 respectively drive the limiting plates 410 to slide along their surfaces, thus restricting their movement and ensuring they are accurately positioned. A turntable 411 is fixedly connected to one end of a bolt 404. The turntable 411 has several grooves 412 on its arc-shaped surface. Rotation of the turntable 411 causes the bolt 404 to move, facilitating its rotation. Both molds A1 and B2 have several circular grooves 414 on their surfaces. A circular plate 413 is rotatably connected to the end of the bolt 404 away from the turntable 411. The size of the circular plate 413 is adapted to the size of the circular groove 414. When the bolt 404 moves, it will drive the circular plate 413 to move closer to the groove 412. When the circular plate 413 moves to the appropriate position, it will slide into the circular groove 414 until the circular plate 413 abuts against the circular groove 414, thereby improving the limiting effect of the bolt 404 on the frame A401 and the frame B402.

[0030] The overall working principle is as follows: when plastic injection molding is required, mold A1 is rotated. First, frames A401 and B402 are respectively placed on the surfaces of mold A1 and mold B2. When frames A401 and B402 are placed on the surfaces of mold A1 and mold B2, they will respectively drive the limiting plate 410 to slide along the surfaces of frames A401 and B402. The limiting plate 410 restricts the movement path of frames A401 and B402, thereby ensuring that frames A401 and B402 are accurately placed in the correct positions. Then, the turntable 411 is rotated. The rotation of the turntable 411 will cause the bolt 404 to move. The bolt 404 will move within the cylinder 403 via the thread. The movement of the bolt 404 will cause the circular plate 413 to move closer to the groove 412. When the circular plate 413 moves to the appropriate position, it will slide into the circular groove 414 until it abuts against the groove 414, thereby improving the limiting effect of the bolt 404 on the frame A401 and the frame B402. After the frame A401 and the frame B402 are limited to the surfaces of the mold A1 and the mold B2, the mold A is then driven. 1. Move away from mold B2. When mold A1 moves to the appropriate position, drive mold A1 to rotate. The rotation of mold A1 will cause positioning rod 405 to rotate. The rotation of positioning rod 405 will cause ring 408 to disengage from the surface of support plate 407. Mold A1 will then drive positioning rod 405 to move closer to support plate 407 on the other side. When positioning rod 405 drives ring 408 to fit against the surface of protective pad 409 on support plate 407, support plate 407 will support positioning rod 405, thereby positioning the rotated positioning rod 405, and thus positioning the rotated mold. Positioning is achieved by B2. The protective pad 409 on the surface of the support plate 407 prevents the positioning rod 405 from directly impacting the surface of the support plate 407, thus avoiding damage to the support plate 407 and the positioning rod 405. Then, the mold A1 is driven to move closer to the mold B2. The mold A1 will drive the positioning rod 405 to move. The movement of the positioning rod 405 will cause the ring 408 to slide along the surface of the protective pad 409. The ring 408 will rotate on its surface with the help of the force of the movement of the positioning rod 405. The ring 408 reduces the friction of the positioning rod 405 when it moves on the surface of the protective pad 409.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rotary positioning mechanism for a plastic injection molding device, comprising a mold A (1) and a mold B (2), wherein a connecting plate (3) is fixedly connected to the side of the mold A (1) and the mold B (2) that is away from each other, and a positioning structure (4) is provided on the surface of the mold A (1) and the mold B (2), characterized in that: The positioning structure (4) includes a frame A (401) and two frames B (402). The frame A (401) and frame B (402) are respectively fitted onto the surfaces of mold A (1) and mold B (2). The two frames B (402) are respectively fitted onto the two sides of mold A (1). A cylinder (403) is fixedly connected to the surface of both mold A (1) and mold B (2). A bolt (404) is threaded through the surface of the cylinder (403). A positioning rod (405) is fixedly connected to the surface of frame A (401). A support arm (406) is fixedly connected to the surface of frame B (402). A support plate (407) is fixedly connected to the end of the support arm (406) away from frame B (402).

2. The rotary positioning mechanism of a plastic injection molding device according to claim 1, characterized in that: The positioning rod (405) has a circular ring (408) fitted on its arc surface.

3. The rotary positioning mechanism of a plastic injection molding device according to claim 1, characterized in that: The surface of the support plate (407) is bonded with a protective pad (409), which is made of rubber.

4. The rotary positioning mechanism of a plastic injection molding device according to claim 1, characterized in that: Limiting plates (410) are fixedly connected to the sides of frames A (401) and B (402) that are far apart from each other. The cross-section of the limiting plates (410) is "L" shaped.

5. The rotary positioning mechanism of a plastic injection molding device according to claim 1, characterized in that: One end of the bolt (404) is fixedly connected to a turntable (411), and the arc surface of the turntable (411) has several grooves (412).

6. The rotary positioning mechanism of a plastic injection molding device according to claim 1, characterized in that: Both mold A (1) and mold B (2) have several circular grooves (414) on their surfaces. The end of the bolt (404) away from the turntable (411) is rotatably connected to a circular plate (413). The size of the circular plate (413) is adapted to the size of the circular groove (414).

Images