Automatic-stripping forming mold for plastic part processing

Abstract

The utility model discloses an automatic stripping forming mold for processing plastic parts, which relates to the technical field of plastic forming molds and comprises a mold plate A and a mold plate B. A mold core A is mounted in the mold plate A, and a mold core B is mounted in the mold plate B; a stripping structure for stripping plastic accessories is mounted in the mold plate A and comprises a connecting rod mounted in the mold core A. The connecting rod is of a cross-shaped structure and slides in the mold core A. Moving columns are fixedly connected to the two longitudinal ends of the connecting rod, and the ends of the moving columns extend to the outer side of the mold core A. The moving columns are fixedly connected to the two longitudinal ends of the connecting rod. And the moving column is slidably connected to the interior of the mold core A. According to the automatic-stripping forming mold for machining the plastic parts, automatic demolding of the plastic parts is achieved through linkage of the moving columns, the connecting rods and the push plates, additional manual intervention is not needed, meanwhile, the area occupied by the push plates exceeds half of the section of the forming cavity, the force application area of the push plates on the formed parts is increased, and the formed parts are prevented from being deformed or broken in the demolding process.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding die technology, specifically to a molding die for automatically unloading plastic parts. Background Technology

[0002] Plastic parts processing molds form the desired product shape through processes such as heating, melting, injecting and cooling plastic raw materials. After production is completed, the plastic molds need to be demolded.

[0003] To achieve the above functions, a prior art Chinese patent (publication number: CN211363268U) discloses a plastic mold demolding structure, in which a finished product ejection mechanism is provided between the moving module and the fixed plate. An upward-penetrating ejector pin is installed on the fixed platen, and an elastic extrusion mechanism is provided between the ejector pin and the fixed platen. This lifts and supports the finished product. During this process, under the action of a tension spring, the ejector pin always presses against the finished product. As the fixed platen moves upward, the elastic deformation of the tension spring gradually decreases. The force changes slowly throughout this process, and the tension spring's elasticity can offset part of the ejection spring's elasticity, preventing the finished product from being ejected and scratched due to the fixed platen's rapid upward movement. This ensures the speed of the fixed platen, improves production efficiency, and guarantees quality. As the fixed platen rises, the ejector pin eventually moves away, and the finished product is lifted for easy removal. Loosening the fastening knob allows for adjustment of the slide cylinder's position, thereby adjusting the tension spring's extrusion force, making it more flexible and convenient.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: In the demolding process of plastic molding molds, ejector pins are generally used to push the mold out of the molding cavity. However, the range of pressure applied by the ejector pins to the molded part is small, which may cause the molded part to deform or break during the demolding process. Utility Model Content

[0005] The purpose of this invention is to provide a molding die for automatically unloading plastic parts, in order to solve the problem in the prior art where the range of pressure applied to the molded part is small, which may cause the molded part to deform or break during the demolding process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a molding die for automatically unloading plastic parts, comprising a template A and a template B, wherein a mold core A is installed inside the template A and a mold core B is installed inside the template B;

[0007] The template A is equipped with a stripping structure for stripping plastic parts. The stripping structure includes a connecting rod installed inside the mold core A. The connecting rod is designed with a cross shape and slides inside the mold core A. Motion columns are fixedly connected to both longitudinal ends of the connecting rod, and the ends of the motion columns extend to the outside of the mold core A and are slidably connected inside the mold core A. A push plate is fixedly connected between the two transverse ends of the connecting rod, and the push plate is located on the side of the mold core A away from the template A, for ejecting the molded part.

[0008] Preferably, the mold core A and mold core B are fitted together to form a molding cavity, and the push plate is located inside the molding cavity. The moving column and mold core B are fitted together, and a return spring is fixedly connected between the end of the moving column near the template A and the inside of the mold core A.

[0009] Preferably, both the template B and the mold core B are provided with two guide pipes inside, and both the template B and the mold core B are provided with circulation pipes distributed in an S-shaped structure inside, and the guide pipes and circulation pipes are interconnected.

[0010] Preferably, the mold core B has an injection hole in the middle, which extends into the molding cavity, and the end of the circulation pipe away from the molding cavity extends into the middle of the template B.

[0011] Preferably, both template A and template B are equipped with water inlet pipes, one end of which is connected to a water circulation device and the other end is connected to a guide pipe, and a sealing ring is installed at the connection between the water inlet pipe and the sealing ring.

[0012] Preferably, both mold core A and mold core B are fixedly connected to the outer side with a fixing ring, and both mold template A and mold template B are provided with threaded holes that are aligned with the fixing rings. The fixing ring is slidably connected with a bolt inside, and the bolt passes through the fixing ring and is threadedly connected inside the threaded hole.

[0013] Preferably, each of the four corners of the template A is fixedly connected with a positioning rod, and each of the four corners of the template B is provided with a positioning hole, and the positioning rod is slidably connected inside the positioning hole. The template B is provided with a feed inlet in the middle, and the feed inlet and the injection hole are interconnected.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This automatic demolding mold for processing plastic parts achieves automatic demolding of plastic parts through the linkage of moving columns, connecting rods and push plates, without the need for additional manual intervention. At the same time, the push plate occupies more than half of the cross-section of the molding cavity, increasing the force application area of ​​the push plate on the molded part and preventing the molded part from deforming or breaking during the demolding process.

[0016] Because mold cores A and B are detachably fixed and securely connected by retaining rings and bolts, the mold cores can be replaced according to the production needs of different plastic parts, thus enabling one mold to be used for a variety of products of different specifications. This design improves the versatility of the equipment and reduces additional mold investment costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of template A structure of this utility model;

[0018] Figure 2 This is a schematic diagram of template B structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of template A of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of template B of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the mold core A of this utility model;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the mold core B of this utility model.

[0023] In the diagram: 1. Template A; 2. Mold Core A; 3. Template B; 4. Mold Core B; 5. Connecting Rod; 6. Push Plate; 7. Moving Column; 8. Return Spring; 9. Guide Pipe; 10. Circulation Pipe; 11. Injection Hole; 12. Fixing Ring; 13. Bolt; 14. Water Inlet Pipe; 15. Sealing Ring; 16. Positioning Rod; 17. Positioning Hole; 18. Feed Inlet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: a molding die for automatically stripping plastic parts, comprising a template A1 and a template B3, wherein a mold core A2 is installed inside the template A1, and a mold core B4 is installed inside the template B3; a stripping structure for stripping plastic parts is installed inside the template A1, and the stripping structure includes a connecting rod 5 installed inside the mold core A2, the connecting rod 5 being a cross-shaped structure, and the connecting rod 5 sliding inside the mold core A2; moving columns 7 are fixedly connected to the longitudinal ends of the connecting rod 5, and the ends of the moving columns 7 extend to the outside of the mold core A2, and the moving columns 7 are slidably connected to the mold core A2. Inside 2, a push plate 6 is fixedly connected between the two ends of the connecting rod 5 laterally, and the push plate 6 is located on the side of the mold core A2 away from the template A1, for ejecting the molded part; the mold core A2 and the mold core B4 fit together to form a molding cavity, and the push plate 6 is located inside the molding cavity; the moving column 7 fits together with the mold core B4, and a return spring 8 is fixedly connected between the end of the moving column 7 near the template A1 and the inside of the mold core A2; both the template B3 and the mold core B4 are provided with two guide pipes 9, and both the template B3 and the mold core B4 are provided with circulation pipes 10 distributed in an S-shaped structure, and the guide pipes 9 and the circulation pipes 10 are interconnected.

[0026] In the production process of plastic parts, templates A1 and B3 are first brought close together until they are completely fitted. During this process, mold core A2, installed inside template A1, and mold core B4, installed inside template B3, also fit together, forming a sealed molding cavity between them. At this point, molten plastic raw material enters the injection hole 11 through the feed port 18 and is injected into the molding cavity located between mold cores A2 and B4. After the raw material is filled, it is shaped inside the molding cavity, and simultaneously cooled by a cooling system to rapidly solidify the plastic material, forming the desired plastic part.

[0027] Automatic material removal is achieved through the stripping structure. When template A1 and template B3 are in contact, mold core B4 will squeeze the moving column 7, causing it to slide into the mold core A2. This movement will drive the connecting rod 5 to slide synchronously inside the mold core A2, and further push the push plate 6 connected to the connecting rod 5 towards the mold core A2 until the push plate 6 is completely in contact with the mold core A2, ensuring the integrity of the molding cavity.

[0028] As templates A1 and B3 gradually separate, mold cores A2 and B4 also separate accordingly. During this process, since mold core B4 no longer applies external force to the moving column 7, the return spring 8 begins to function, pushing the moving column 7 to slide outwards from mold core A2. This sliding action will drive the push plate 6 away from mold core A2 via connecting rod 5, thereby ejecting the molded plastic part from mold core A2, achieving automatic demolding. Simultaneously, the push plate 6 occupies more than half the cross-section of the molding cavity, increasing the area of ​​force applied by the push plate 6 to the molded part and preventing deformation or breakage of the molded part during demolding.

[0029] The stripper structure boasts excellent compatibility, making it suitable for various mold core designs. Redundant space is reserved within mold core B4 to ensure no interference with the guide tube 9 during stripper structure installation. Furthermore, the structural shape of connecting rod 5 can be adjusted during installation to adapt to different mold designs.

[0030] During the cooling stage of the molten raw material, cooling water is transported to the inside of the guide pipe 9 through the water inlet pipe 14. The cooling water then flows along the circulation pipe 10, absorbing heat from the mold cores A2 and B4 in the process, thereby achieving effective cooling. The cooled water is discharged through another guide pipe 9, and this cycle is repeated, making the cooling process more stable and efficient, ensuring that the plastic product solidifies and sets quickly.

[0031] Example 2: Based on Example 1, the following structure is also disclosed: A molding hole 11 is provided in the middle of mold core B4, and the molding hole 11 extends into the molding cavity; the end of the circulation pipe 10 away from the molding cavity extends to the middle of template B3; both template A1 and template B3 are provided with water inlet pipes 14, one end of which is connected to a water circulation device, and the other end is connected to a guide pipe 9; a sealing ring 15 is installed at the connection between the water inlet pipe 14 and the sealing ring 15; the outer sides of mold core A2 and mold core B4... Both template A1 and template B3 are fixedly connected with fixing rings 12, and both template A1 and template B3 are provided with threaded holes aligned with fixing rings 12. Bolts 13 are slidably connected inside fixing rings 12, and bolts 13 pass through fixing rings 12 and are threaded into the threaded holes. Positioning rods 16 are fixedly connected at the four corners of template A1, and positioning holes 17 are provided at the four corners of template B3. Positioning rods 16 are slidably connected inside positioning holes 17. A feed port 18 is provided in the middle of template B3, and the feed port 18 and injection hole 11 are interconnected.

[0032] The mold core B4 has an injection hole 11 in the center. This channel runs through the entire mold core B4 and is directly connected to the molding cavity, ensuring that the molten material can smoothly enter the molding cavity. In addition, to improve the cooling effect, one end of the circulation pipe 10 extends to the middle of the mold plate B3, allowing cooling water to flow smoothly through the entire mold and improving cooling efficiency.

[0033] Both template A1 and template B3 are equipped with water inlet pipes 14. One end of these water inlet pipes 14 is connected to an external water circulation device, and the other end is connected to a guide pipe 9. To ensure the water flow is sealed during the cooling process, a sealing ring 15 is installed at the connection between the water inlet pipe 14 and the guide pipe 9 to prevent cooling water leakage.

[0034] Each mold core A2 and mold core B4 is fixedly connected to a retaining ring 12 on its outer side. Templates A1 and B3 have corresponding threaded holes, allowing bolts 13 to pass through the retaining rings 12 and tighten into the threaded holes, thus ensuring that mold cores A2 and B4 are securely installed inside templates A1 and B3. This design facilitates mold core replacement, allowing users to adapt to the production needs of different specifications of plastic parts simply by replacing different mold cores A2 and B4, improving the versatility and economy of the mold.

[0035] Positioning rods 16 and positioning holes 17 are respectively set at the four corners of template A1 and template B3. When template A1 and template B3 are attached, the positioning rods 16 will be accurately inserted into the positioning holes 17 to ensure that the two templates can maintain precise alignment and avoid product defects or quality problems caused by misalignment.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A molding die for automatically unloading plastic parts processing, comprising template A (1) and template B (3), wherein template A (1) is fitted with a mold core A (2) and template B (3) is fitted with a mold core B (4); Its features are: The template A (1) is equipped with a stripping structure for stripping plastic parts. The stripping structure includes a connecting rod (5) installed inside the mold core A (2). The connecting rod (5) is a cross-shaped structure and slides inside the mold core A (2). The two longitudinal ends of the connecting rod (5) are fixedly connected to a moving column (7), and the end of the moving column (7) extends to the outside of the mold core A (2). The moving column (7) is slidably connected inside the mold core A (2). The two transverse ends of the connecting rod (5) are fixedly connected to a push plate (6), and the push plate (6) is located on the side of the mold core A (2) away from the template A (1) for ejecting the molded part.

2. The molding die for automatically unloading plastic parts processing according to claim 1, characterized in that: The mold core A (2) and mold core B (4) are fitted together to form a molding cavity, and the push plate (6) is located inside the molding cavity. The moving column (7) and mold core B (4) are fitted together, and a return spring (8) is fixedly connected between the end of the moving column (7) near the template A (1) and the inside of the mold core A (2).

3. The molding die for automatically unloading plastic parts processing according to claim 1, characterized in that: The template B (3) and the core B (4) are each provided with two guide pipes (9), and the template B (3) and the core B (4) are each provided with circulation pipes (10) distributed in an S-shape, and the guide pipes (9) and circulation pipes (10) are interconnected.

4. The molding die for automatically unloading plastic parts processing according to claim 1, characterized in that: The mold core B (4) has an injection hole (11) in the middle, and the injection hole (11) extends into the molding cavity, and the end of the circulation pipe (10) away from the molding cavity extends to the middle of the template B (3).

5. The molding die for automatically unloading plastic parts processing according to claim 4, characterized in that: Both template A (1) and template B (3) are equipped with water inlet pipes (14), one end of the water inlet pipe (14) is connected to the water circulation equipment, and the other end is connected to the guide pipe (9). A sealing ring (15) is installed at the connection between the water inlet pipe (14) and the sealing ring (15).

6. The molding die for automatically unloading plastic parts processing according to claim 1, characterized in that: The outer sides of both mold core A (2) and mold core B (4) are fixedly connected with fixing rings (12), and both template A (1) and template B (3) are provided with threaded holes aligned with the fixing rings (12). The fixing rings (12) are slidably connected with bolts (13), and the bolts (13) pass through the fixing rings (12) and are threadedly connected to the inside of the threaded holes.

7. The molding die for automatically unloading plastic parts processing according to claim 1, characterized in that: The template A (1) is fixedly connected to the four corners with positioning rods (16), and the template B (3) is provided with positioning holes (17) at the four corners. The positioning rods (16) are slidably connected inside the positioning holes (17). The template B (3) is provided with a feed inlet (18) in the middle, and the feed inlet (18) and the injection hole (11) are interconnected.

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