Automatic material pulling die

Abstract

The utility model relates to the technical field of material pulling molds, and discloses an automatic material pulling mold which comprises an upper mold assembly and a lower mold assembly, and a rack assembly for rotating a product subjected to injection molding down from a lower mold plate is arranged on a base plate of the lower mold assembly; the rack assembly comprises a fixing block, a mounting block, a horizontal guide rod, a guide block, an oil cylinder and a gear set matched with a rack. The gear set comprises a double-layer gear, a driving gear, two driven gears A and two driven gears C meshed with the two driven gears A through two driven gears B. The two driven gears A and the two driven gears C are connected with the four rotating rods correspondingly, and the oil cylinder pushes the rack to rotate to drive the gear set and the rotating rods to rotate. Therefore, a product after injection molding is rotated from the upper end of the rotating rod, manual intervention is not needed, the production speed and efficiency are remarkably improved, uncertainty of manual operation is reduced through automatic operation, and consistency and precision of the product are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulling molds, and particularly relates to an automatic pulling mold. Background Technique

[0002] In the prior art, for products with threads, after being injection molded by an injection mold, they usually need to be manually unscrewed. Manual unscrewing of products requires manual operation, which is slow and cannot meet the requirements of large-scale production. Manual operation may result in uneven force for unscrewing the products, affecting the accuracy of the products. Manual unscrewing of products requires manual operation, with a relatively high labor intensity and certain requirements for the physical fitness of workers. When manually unscrewing products, if the force is too large, it may cause damage to the products. Especially for some products with high precision requirements, improper manual operation may cause personal injuries.

[0003] Pulling molds are usually used to produce complex-shaped parts or products, such as products with threads. When the mold is opened, certain actions are taken to assist product forming or facilitate demolding. Therefore, in order to improve production efficiency, ensure product accuracy, reduce labor intensity, avoid product damage, and ensure personnel safety, we propose an automatic pulling mold. Content of the Utility Model

[0004] In order to make up for the deficiencies of the prior art, the utility model proposes an automatic pulling mold.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An automatic pulling mold, comprising an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper mold base, an upper template, and a stripping plate. The upper template is located below the upper mold base, and the stripping plate is located between the upper mold base and the upper template;

[0007] The lower mold assembly includes a lower mold base corresponding to the upper mold base, a lower template located above the lower mold base and corresponding to the upper template, and a backing plate located between the lower mold base and the lower template. A rack assembly for rotating the injection-molded product off the lower template is provided on the backing plate;

[0008] The rack assembly includes a fixed block, a mounting block fixed on one side of the lower template and the backing plate, a horizontal guide rod arranged between the fixed block and the mounting block, a guide block that is in guiding sliding cooperation with the horizontal guide rod and is fixedly connected to the rack, an oil cylinder fixedly arranged on the mounting block and connected to the guide block, and a gear set that cooperates with the rack;

[0009] The gear set includes a double-layer gear meshing with the rack, a driving gear meshing with the lower-layer gear of the double-layer gear, two driven gears A meshing with the driving gear and located on both sides of the driving gear, and two driven gears C respectively meshing with the two driven gears A through two driven gears B. The two driven gears A and the two driven gears C are respectively connected to four rotating rods. A threaded portion A for mating with the internal thread of the product during injection molding is provided at the upper end of the rotating rod, and a threaded portion B with the same rotation direction as the threaded portion A is provided at the lower end of the rotating rod. The oil cylinder is used to push the rack to rotate, driving the gear set and the rotating rod to rotate, so as to rotate the product after injection molding down from the upper end of the rotating rod.

[0010] Preferably, a sprue bushing is provided in the middle of the upper mold base. A runner plate cavity is formed on the upper surface of the upper template. A runner plate is installed in the runner plate cavity. A runner is formed on the runner plate. The liquid inlet of the runner is communicated with the liquid outlet of the sprue bushing. A front mold core is inlaid on the upper template along its length direction.

[0011] It helps the plastic melt to flow smoothly during the injection molding process, thereby improving the injection molding efficiency and product quality. The liquid inlet of the runner is communicated with the liquid outlet of the sprue bushing, ensuring the uniform filling of the plastic.

[0012] Preferably, a rear mold core corresponding to the front mold core is inlaid on the lower template. The front mold core, the rear mold core and the upper end of the rotating rod together form an injection molding cavity for injecting the product. The liquid inlet of the injection molding cavity is communicated with the liquid outlet of the runner.

[0013] The inlay of the front mold core on the upper template helps to form the injection molding cavity and, together with the rear mold core and the rotating rod, ensures the accurate shape and size of the product. This design can improve the product precision and reduce the scrap rate.

[0014] Preferably, the backing plate includes a backing plate A and a backing plate B arranged in sequence from top to bottom. Avoidance channels for guiding the movement of the rack are respectively formed on the backing plate A and the lower template.

[0015] The arrangement of the backing plate A and the backing plate B helps to provide additional support and stability. At the same time, the avoidance channel formed on the backing plate A helps to guide the movement of the rack, ensuring the smooth movement of the rack assembly, reducing friction and resistance.

[0016] Preferably, the bottom end of the rotating rod is rotatably arranged on the backing plate B, and the upper end of the rotating rod extends into the interior of the rear mold core. Such a design enables the rotating rod to rotate effectively, thereby rotating the product down. The double-layer gear, the driving gear and the driven gear B are all arranged at the bottom of the lower template. The driven gear A and the driven gear C are located in the mold cavities formed on the backing plate A and the lower template. Such a layout helps to reduce the overall height of the mold and improve the space utilization efficiency.

[0017] Compared with the prior art, the technical effects and advantages of the present utility model are as follows:

[0018] In this automatic material pulling die, through the automation device, the piston movement of the oil cylinder is controlled to push the rack assembly to move. The rack assembly meshes with the gear set. As the rack moves, the gear set starts to rotate. The rotation of the gear set is transmitted through the rotating rod. The threaded part A on the rotating rod cooperates with the internal thread of the product during injection molding, realizing the rotational drop of the product. As the rotating rod rotates, the product is gradually screwed off and released from the die;

[0019] This automatic material pulling die can realize the automatic rotational blanking of the product without manual intervention, significantly improving the production speed and efficiency. The automated operation reduces the uncertainty of manual operation, ensures the consistency and precision of the product, reduces the quality fluctuations caused by manual operation, reduces the physical labor of workers, improves the working environment, and reduces the fatigue of workers caused by long-term repetitive labor. The automatic rotational blanking of the product avoids the possible damage to the product during manual screwing off, improves the integrity and yield rate of the product. The automated equipment reduces the direct contact between workers and machines, reduces the risk of safety accidents, and improves the safety of the production process.

[0020] The precise cooperation of the front mold, rear mold core and the upper end of the rotating rod ensures the precise shape and size of the injection molded product, improves the precision and stability of the die. The design of the avoidance channel on the backing plate reduces the wear caused by uneven force during the movement of the rack, extending the service life of the die. The layout design of the rotating rod and the gear helps to reduce the overall height of the die, improving the space utilization efficiency. By controlling the distance that the oil cylinder pushes the rack to move, the rotation speed of the rotating rod and the blanking speed of the product can be precisely controlled to achieve precise adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model from the first perspective;

[0022] Figure 2 is a schematic structural diagram of the present utility model from the second perspective;

[0023] Figure 3 is a schematic structural diagram of the present utility model after removing the upper mold base, stripper plate, upper template, lower template, backing plate A and backing plate B.

[0024] Figure 4 is a schematic structural diagram of the gear set of the present utility model from the first perspective;

[0025] Figure 5 is a schematic structural diagram of the gear set of the present utility model from the second perspective.

[0026] In the figure: 1. Upper die base; 2. Stripping plate; 3. Upper template; 4. Lower template; 5. Pad A; 6. Pad B; 7. Lower die base; 8. Sprue bushing; 9. Fixed block; 10. Guide block; 11. Horizontal guide rod; 12. Mounting block; 13. Oil cylinder; 14. Rack; 15. Driven gear C; 16. Driven gear B; 17. Driving gear; 18. Double-layer gear; 19. Driven gear A; 20. Threaded part A; 21. Screw rod; 22. Threaded part B; 23. Front mold core; 24. Rear mold core; 25. Avoidance channel. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] The following is a further detailed description of this application in conjunction with the attached Figures 1-5 This application will be further described in detail.

[0029] The embodiment of this application discloses an automatic material pulling mold, including an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base 1, an upper template 3, and a stripping plate 2. The upper template 3 is located below the upper die base 1, and the stripping plate 2 is located between the upper die base 1 and the upper template 3;

[0030] The lower die assembly includes a lower die base 7 corresponding to the upper die base 1, a lower template 4 located above the lower die base 7 and corresponding to the upper template 3, and a pad located between the lower die base 7 and the lower template 4. A rack assembly for rotating the injection-molded product from the lower template 4 is provided on the pad;

[0031] The rack assembly includes a fixed block 9, a mounting block 12 fixed on one side of the lower template 4 and the pad, a horizontal guide rod 11 provided between the fixed block 9 and the mounting block 12, a guide block 10 that is in guiding sliding cooperation with the horizontal guide rod 11 and is fixedly connected to the rack 14, an oil cylinder 13 fixedly provided on the mounting block 12 and connected to the guide block 10, and a gear set that cooperates with the rack 14;

[0032] The gear set includes a double-layer gear 18 meshing with the rack 14, a driving gear 17 meshing with the lower-layer gear of the double-layer gear 18, two driven gears A 19 meshing with the driving gear 17 and located on both sides of the driving gear 17, and two driven gears C 15 respectively meshing with the two driven gears A 19 through two driven gears B 16. The two driven gears A 19 and the two driven gears C 15 are respectively connected to four screw rods 21. A threaded portion A 20 for mating with the internal thread of the product injection molding is provided at the upper end of the screw rod 21, and a threaded portion B 22 having the same rotation direction as the threaded portion A 20 is provided at the lower end of the screw rod 21. The oil cylinder 13 is used to push the rack 14 to rotate, driving the gear set and the screw rod 21 to rotate, so as to rotate the product after injection molding down from the upper end of the screw rod 21.

[0033] During the injection molding process, the molten plastic is injected into the mold cavity between the upper and lower mold components through an injection molding machine. The product after injection molding needs to be cooled and solidified in the mold for a period of time to ensure that the product is completely formed and has sufficient strength. When the mold is opened after the product is cooled and solidified, by controlling the piston movement of the oil cylinder 13, the rack assembly is pushed to move. The rack assembly meshes with the gear set. As the rack 14 moves, the gear set starts to rotate. The rotation of the gear set is transmitted through the screw rod 21. The threaded portion A 20 on the screw rod 21 cooperates with the internal thread of the product injection molding to realize the rotational drop of the product. As the screw rod 21 rotates, the product is gradually screwed down and released from the mold.

[0034] This automatic material pulling mold can automatically rotate the product down without manual intervention, greatly improving the production speed and efficiency. Automatically rotating the product down reduces the uncertainty of manual operation, ensuring the consistency and accuracy of the product. Automated operation reduces the physical labor of workers and improves the working environment. Automatically rotating the product down avoids possible damage caused by manual screwing down. Automated equipment reduces the direct contact between workers and machines, reducing the risk of safety accidents.

[0035] A sprue bushing 8 is provided in the middle of the upper mold base 1. A runner plate cavity is opened on the upper surface of the upper template 3. A runner plate is installed in the runner plate cavity. A runner is opened on the runner plate. The liquid inlet of the runner is communicated with the liquid outlet of the sprue bushing 8. A front mold core 23 is inlaid on the upper template 3 along its length direction.

[0036] The design of the sprue bushing 8 helps the plastic melt to flow more smoothly during the injection molding process, reducing the resistance of plastic flow, thereby improving the injection molding efficiency. The design of the runner plate and the runner helps the plastic melt to fill the mold cavity more evenly and quickly, improving the quality and consistency of the injection molded product. By optimizing the filling process of the plastic melt, defects such as air bubbles and shrinkage holes generated during the injection molding process can be reduced, thereby reducing the scrap rate. Through the design of the automatic material pulling mold, manual intervention can be reduced and the production efficiency can be improved.

[0037] A rear mold core 24 corresponding to the front mold core 23 is inlaid on the lower template 4. The upper ends of the front mold core 23, the rear mold core 24, and the screw rod 21 together form an injection cavity for injecting products, and the liquid inlet of the injection cavity is communicated with the liquid outlet of the runner.

[0038] The cooperation between the front mold core 23 and the rear mold core 24, as well as the precise design of the injection cavity, can ensure the precise shape and size of the injection-molded product, improve the precision and stability of the mold. The design of the automatic material pulling mold can reduce manual intervention and improve production efficiency. At the same time, the precise connection between the liquid inlet and the liquid outlet can ensure the smooth flow of the plastic melt, further improving production efficiency. The precise cooperation between the front and rear mold cores 24, as well as the precise design of the injection cavity, can reduce defects such as air bubbles and shrinkage cavities during the filling process of the plastic melt, thereby reducing the rejection rate.

[0039] The backing plate includes a backing plate A5 and a backing plate B6 arranged in sequence from top to bottom. Avoidance channels 25 for guiding the movement of the mating rack 14 are respectively provided on the backing plate A5 and the lower template 4.

[0040] The provision of the backing plate A5 and the backing plate B6 can provide additional support and stability, ensuring that the rack 14 does not shake or deform during movement, thereby improving the stability of movement. The opening of the avoidance channels 25 for guiding the movement of the mating rack 14 helps to reduce the friction and resistance between the rack 14 and other components of the mold, making the movement of the rack 14 smoother and more stable. The setting of the avoidance channels 25 can make the guiding of the rack 14 more accurate, provide a clear path, simplify the operation steps, and improve production efficiency. The design of the avoidance channels 25 can effectively reduce the wear caused by uneven force on the rack 14 during movement, extending the service life of the mold.

[0041] The bottom end of the screw rod 21 is rotatably provided on the backing plate B6, and the upper end of the screw rod 21 extends into the interior of the rear mold core 24. Such a design enables the screw rod 21 to rotate effectively, thereby rotating the product downward. The double-layer gear 18, the driving gear 17, and the driven gear B16 are all provided at the bottom of the lower template 4. The driven gear A19 and the driven gear C15 are located in the mold cavities provided on the backing plate A5 and the lower template 4. Such a layout helps to reduce the overall height of the mold and improve the space utilization efficiency.

[0042] The extension of the rotating rod 21 and the setting of the gears help to achieve the functions of automatic material pulling and rotating material discharging, thereby improving the degree of automation, reducing manual intervention. The use of the automatic material pulling mold can reduce labor costs and at the same time reduce the rejection rate caused by improper manual operation during the production process. The automatic material pulling mold has a high degree of automation, can greatly improve production efficiency and shorten the production cycle. By controlling the distance that the oil cylinder 13 pushes the rack 14 to move, the rotation speed of the rotating rod 21 and the speed of product material discharging can be adjusted, so as to achieve precise control and adjustment.

[0043] For this automatic material pulling mold, when opening the mold, by controlling the piston movement of the oil cylinder 13, the rack assembly is pushed to move. The rack assembly meshes with the gear set. As the rack 14 moves, the gear set starts to rotate. The rotation of the gear set is transmitted through the rotating rod 21. The threaded part A20 of the rotating rod 21 cooperates with the internal thread of the product injection molding to realize the rotating fall of the product. As the rotating rod 21 rotates, the product is gradually screwed down and released from the mold.

[0044] The entire working process realizes the process of automatic rotating material discharging of the product by means of the oil cylinder 13 pushing the rack 14, the rotation of the gear set, and the rotating rod 21 transmitting power, reducing manual operation and improving production efficiency. At the same time, the sprue bushing 8 and runner design during the injection molding process, the cooperation of the upper and lower templates 4, the setting of the backing plate, etc. all help to improve product quality and production efficiency. Generally speaking, this automatic material pulling mold has a reasonable structure and perfect functions, has a high degree of automation and production efficiency, and can meet the needs of large-scale production.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic drawing die, comprising an upper die assembly and a lower die assembly, characterized in that: The upper die assembly comprises an upper die base (1), an upper die plate (3) and a stripper plate (2), wherein the upper die plate (3) is located below the upper die base (1), and the stripper plate (2) is located between the upper die base (1) and the upper die plate (3); The lower mold assembly comprises a lower mold base (7) corresponding to the upper mold base (1), a lower mold plate (4) located above the lower mold base (7) and corresponding to the upper mold plate (3), and a pad located between the lower mold base (7) and the lower mold plate (4), wherein a rack assembly is provided on the pad plate for rotating the injection molded product from the lower mold plate (4); The rack assembly comprises a fixed block (9) fixed to the lower template (4) and one side of the pad, a mounting block (12), a horizontal guide rod (11) arranged between the fixed block (9) and the mounting block (12), a guide block (10) slidingly guided in cooperation with the horizontal guide rod (11) and fixedly connected to the rack (14), an oil cylinder (13) fixedly arranged on the mounting block (12) and connected to the guide block (10), and a gear set cooperating with the rack (14); The gear set comprises a double-layer gear (18) meshing with a rack (14), a driving gear (17) meshing with a lower gear of the double-layer gear (18), two driven gears A (19) meshing with the driving gear (17) and located on both sides of the driving gear (17), and two driven gears C (15) respectively meshing with the two driven gears A (19) through two driven gears B (16). The two driven gears A (19) and the two driven gears C (15) are respectively connected to four rotating rods (21). The upper end of the rotating rod (21) is provided with a threaded portion A (20) matching the internal thread of the product injection molding, and the lower end of the rotating rod (21) is provided with a threaded portion B (22) having the same rotation direction as the threaded portion A (20). The oil cylinder (13) drives the rack (14) to rotate, thereby driving the gear set and the rotating rod (21) to rotate, thereby rotating the injection molded product from the upper end of the rotating rod (21).

2. The automatic drawing die according to claim 1, characterized in that: A gate sleeve (8) is provided in the middle of the upper mold base (1), a flow channel plate cavity is provided on the upper surface of the upper mold plate (3), a flow channel plate is installed in the flow channel plate cavity, a flow channel is provided on the flow channel plate, a liquid inlet of the flow channel is connected to a liquid outlet of the gate sleeve (8), and a front mold core (23) is embedded on the upper mold plate (3) along its length direction.

3. The automatic drawing die according to claim 2, characterized in that: The lower mold plate (4) is inlaid with a rear mold core (24) corresponding to the front mold core (23); the front mold core (23), the rear mold core (24) and the upper end of the rotating rod (21) together form an injection cavity for injection molding products; the liquid inlet of the injection cavity is connected to the liquid outlet of the flow channel.

4. The automatic drawing die according to claim 1, characterized in that: The pads include a pad A (5) and a pad B (6) arranged in sequence from top to bottom, and the pad A (5) and the lower template (4) are respectively provided with an avoidance channel (25) for cooperating with the rack (14) for guiding movement.

5. The automatic drawing die according to claim 4, characterized in that: The bottom end of the rotary rod (21) is rotatably mounted on the backing plate B (6), and the top end of the rotary rod (21) extends to the interior of the rear mold core (24). The double-layer gear (18), the driving gear (17) and the driven gear B (16) are all arranged at the bottom of the lower mold plate (4). The driven gear A (19) and the driven gear C (15) are located in grooves provided on the backing plate A (5) and the lower mold plate (4).

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