Runner structure of injection molding mold for pet products

Abstract

The utility model relates to the technical field of mold runners, and discloses a pet product injection molding mold runner structure which comprises a base, telescopic rods are fixedly connected to the four corners of the top of the base, a lower mold frame is fixedly connected to the tops of the telescopic rods, a connecting frame is fixedly connected to the top of the base, and the connecting frame is fixedly connected to the bottom of the base. A top plate is fixedly connected to the top of the connecting frame, a main runner is fixedly connected to the middle of the bottom end of the top plate, branch runners are fixedly connected to the periphery of the bottom of the main runner, round supporting rods are fixedly connected to the four corners of the bottom end of the top plate, and an upper mold frame is fixedly connected to the bottom ends of the round supporting rods. According to the utility model, molten plastic can flow smoothly, blockage and uneven flow are avoided, the plastic is kept at a proper temperature, good flowability is ensured, an injection molding material flows into a model more quickly, the molding degree of the model is ensured, the production efficiency is improved, waste materials are reduced, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold runners, in particular to a runner structure of an injection molding mold for pet supplies. Background Technique

[0002] Injection molding is a method for manufacturing industrial product shapes. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. It is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting materials. Injection molding is achieved through an injection molding machine and a mold.

[0003] The runner structure of an injection molding mold is a key part of the plastic injection molding process. It directly affects the molding efficiency and product quality of the mold. The design of the runner system aims to ensure that the molten plastic can be evenly and quickly injected into all parts of the mold. Its background technology involves multiple aspects, including mold design, material science, processing technology, and machinery and equipment. Different field applications put forward different requirements for the design and manufacturing of the mold.

[0004] During the injection molding process, the injection molding material first enters the main runner. Since the main runner is too long, it will cause the material to have poor cooling fluidity, low material utilization rate, and poor model formation. When the injection molding is completed, demolding treatment is required, and the model cooling also takes a lot of time, which in turn increases the mold replacement and demolding time and increases the complexity of the work. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a runner structure of an injection molding mold for pet supplies, aiming to improve the problems of easy material cooling and long model cooling time in the prior art.

[0006] To achieve the above object, the utility model adopts the following technical solution: A runner structure of an injection molding die for pet supplies, including a base, telescopic rods are fixedly connected to four corners of the top of the base, a lower mold frame is fixedly connected to the top of the telescopic rods, a connecting frame is fixedly connected to the top of the base, a top plate is fixedly connected to the top of the connecting frame, a main runner is fixedly connected to the middle of the bottom end of the top plate, sub-runners are fixedly connected to the four peripheries of the bottom of the main runner, round support rods are fixedly connected to four corners of the bottom end of the top plate, an upper mold frame is fixedly connected to the bottom end of the round support rods, the other ends of multiple sub-runners are fixedly connected to the inner wall of the upper mold frame, a square support column is fixedly connected to the top of the rear side of the upper mold frame, a limiting strip is fixedly connected to the top end of the square support column, slide rails are opened on both the upper and lower sides of the limiting strip, sliders are slidably connected to the inner walls of the slide rails, a bent connecting rod is fixedly connected to the left side of the slider, a heating sheet is fixedly connected to the other end of the bent connecting rod, a motor is fixedly connected to the middle of the rear side of the limiting strip, a rotating rod is fixedly connected to the output end of the motor, transmission rods are rotatably connected to both ends of the rotating rod, the other ends of the transmission rods are rotatably connected to the front side of the slider, lower mold boxes are opened at four corners of the top of the lower mold frame, upper mold boxes are opened at four corners of the bottom of the upper mold frame, a cooling circulation structure is arranged at the bottom of the lower mold frame, and the circulation structure is used to accelerate the cooling and shaping of the mold.

[0007] As a further description of the above technical solution:

[0008] The cooling circulation structure includes a cooling water tank, the outer wall of the cooling water tank is fixedly connected to the inner wall of the lower mold frame, circulation water pipes are fixedly connected to two corners of the bottom of the cooling water tank, multiple circulation water pipes are fixedly connected to the other ends of the circulation water pumps, the other ends of the circulation water pumps are fixedly connected to a refrigeration water tank, fixing rods are fixedly connected to four corners of the bottom of the cooling water tank, the bottom of the fixing rods is fixedly connected to the top of the refrigeration water tank, heat transfer pipes are fixedly connected to the upper four walls of the cooling water tank, heat transfer fins are fixedly connected to the other side of the heat transfer pipes, and the outer walls of the heat transfer fins are fixedly connected to the inner walls of the lower mold boxes.

[0009] As a further description of the above technical solution:

[0010] An injection port is fixedly connected to the top of the main runner, and a water tank groove is opened in the middle of the base.

[0011] As a further description of the above technical solution:

[0012] A controller is fixedly connected to the front end of the lower mold frame, and the controller is electrically connected to the telescopic rod, the motor and the circulation water pump respectively.

[0013] As a further description of the above technical solution:

[0014] Triangular grooves are provided at the four corners of the lower mold frame and the upper mold frame, and screws are rotatably connected to the bottoms of the triangular grooves.

[0015] As a further description of the above technical solution:

[0016] Bottom columns are fixedly connected to the four corners at the bottom of the base, and buffer pads are fixedly connected to the bottom ends of the bottom columns.

[0017] As a further description of the above technical solution:

[0018] A water inlet is fixedly connected to the front side of the refrigeration water tank, and a drain outlet is fixedly connected to the rear side of the bottom of the refrigeration water tank.

[0019] As a further description of the above technical solution:

[0020] A water inlet filter is fixedly connected to the inner wall of the water inlet, and a drain filter is fixedly connected to the inner wall of the drain outlet.

[0021] The present utility model has the following beneficial effects:

[0022] 1. In the present utility model, when the motor works, it drives the rotating rod to rotate. The rotation of the rotating rod drives the slider to slide horizontally in the slide rail of the limiting strip. The sliding of the slider drives the bent connecting rod to move the heating sheets towards each other, so as to be close to the outer wall of the main runner, enabling the injection molding material to flow smoothly in the main runner, ensuring that the molten plastic can flow smoothly, avoiding blockage and uneven flow, maintaining the plastic at an appropriate temperature, ensuring good fluidity, enabling the injection molding material to flow into the mold faster, ensuring the molding degree of the mold, improving production efficiency, reducing waste, and improving product quality.

[0023] 2. In the present utility model, when the circulating water pump starts to work, the mold in the lower mold box quickly transfers heat to the heat transfer sheet, and then transfers it to the cooling water tank through the heat transfer pipe. The hot water in the cooling water tank is transferred to the refrigeration water tank, and the refrigeration water tank quickly cools the hot water and then circulates it back to the cooling water tank through the circulating water pump. Thus, the heat of the mold can be quickly removed, ensuring uniform cooling of the mold, reducing the mold temperature, shortening the cycle time, avoiding warping and shrink marks. The design of the temperature control system needs to cooperate with the cooling system of the mold to achieve the best molding effect. Description of the Drawings

[0024] Figure 1 It is a front-side perspective view of the base of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0025] Figure 2Partial structural diagram of the upper mold frame of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0026] Figure 3 Partial structural breakdown diagram of a cooling cycle structure of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0027] Figure 4 Partial bottom view of the upper mold frame of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0028] Figure 5 Partial top view of the lower mold frame of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0029] Figure 6 Structural breakdown diagram of a runner structure of an injection molding mold for pet supplies proposed by the present utility model.

[0030] Legend description:

[0031] 1. Base; 2. Cooling cycle structure; 201. Cooling water tank; 202. Circulation water pipe; 203. Circulation water pump; 204. Fixed rod; 205. Refrigeration water tank; 206. Heat transfer pipe; 207. Heat transfer fin; 208. Drain port; 209. Water inlet; 210. Water inlet filter; 211. Drain filter; 3. Lower mold frame; 4. Lower mold box; 5. Upper mold frame; 6. Upper mold box; 7. Sub-runner; 8. Main runner; 9. Injection port; 10. Top plate; 11. Circular support rod; 12. Connecting frame; 13. Telescopic rod; 14. Controller; 15. Square support column; 16. Limiting strip; 17. Slide rail; 18. Slide block; 19. Bent connecting rod; 20. Transmission rod; 21. Motor; 22. Rotating rod; 23. Heating sheet; 24. Triangular groove; 25. Screw; 26. Bottom column; 27. Buffer pad; 28. Water tank groove. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Please refer to the attached Figure 1 、attached Figure 2 and attached Figure 6, an embodiment provided by the present utility model: a runner structure of an injection molding die for pet supplies, including a base 1. At the four corners of the top of the base 1, telescopic rods 13 are fixedly connected. At the top of the telescopic rods 13, a lower mold frame 3 is fixedly connected. At the top of the base 1, a connecting frame 12 is fixedly connected. At the top of the connecting frame 12, a top plate 10 is fixedly connected. In the middle of the bottom end of the top plate 10, a main runner 8 is fixedly connected. Around the bottom of the main runner 8, sub-runners 7 are fixedly connected. At the four corners of the bottom end of the top plate 10, round support rods 11 are fixedly connected. At the bottom end of the round support rods 11, an upper mold frame 5 is fixedly connected. The other ends of the plurality of sub-runners 7 are fixedly connected to the inner wall of the upper mold frame 5. At the top of the rear side of the upper mold frame 5, a square support column 15 is fixedly connected. At the top end of the square support column 15, a limiting strip 16 is fixedly connected. Sliding rails 17 are provided on both the upper and lower sides of the limiting strip 16. Inside the sliding rails 17, sliders 18 are slidably connected. On the left side of the slider 18, a bent connecting rod 19 is fixedly connected. At the other end of the bent connecting rod 19, a heating sheet 23 is fixedly connected. In the middle of the rear side of the limiting strip 16, a motor 21 is fixedly connected. At the output end of the motor 21, a rotating rod 22 is fixedly connected. At both ends of the rotating rod 22, transmission rods 20 are rotatably connected. The other end of the transmission rod 20 is rotatably connected to the front side of the slider 18. At the four corners of the top of the lower mold frame 3, lower mold boxes 4 are provided. At the four corners of the bottom of the upper mold frame 5, upper mold boxes 6 are provided. At the bottom of the lower mold frame 3, a cooling circulation structure 2 is provided, and the cooling circulation structure 2 is used to accelerate the cooling and shaping of the mold;

[0034] Specifically, round support rods 11 are fixedly connected to the four corners of the bottom end of the top plate 10. The bottom ends of these round support rods 11 are fixedly connected to the upper mold frame 5. The other ends of the sub-runners 7 are fixedly connected to the inner wall of the upper mold frame 5. At the top of the rear side of the upper mold frame 5, a square support column 15 is fixedly connected. At the top end of the square support column 15, a limiting strip 16 is fixedly connected. Sliding rails 17 are provided on both the upper and lower sides of the limiting strip 16. Inside the sliding rails 17, sliders 18 are slidably connected. On the left side of the slider 18, a bent connecting rod 19 is fixedly connected. At the other end of the bent connecting rod 19, a heating sheet 23 is fixedly connected. In the middle of the rear side of the limiting strip 16, a motor 21 is fixedly connected. At the output end of the motor 21, a rotating rod 22 is fixedly connected. At both ends of the rotating rod 22, transmission rods 20 are rotatably connected. The other end of the transmission rod 20 is rotatably connected to the front side of the slider 18. At the four corners of the top of the lower mold frame 3, lower mold boxes 4 are provided. At the four corners of the bottom of the upper mold frame 5, upper mold boxes 6 are provided. At the bottom of the lower mold frame 3, a cooling circulation structure 2 is provided, and this cooling circulation structure 2 is for accelerating the cooling and shaping process of the mold.

[0035] Please refer to the attached Figure 3 、attached Figure 5 and attached Figure 6, the cooling cycle structure 2 includes a cooling water tank 201. The outer wall of the cooling water tank 201 is fixedly connected to the inner wall of the lower mold frame 3. At both corners of the bottom of the cooling water tank 201, circulating water pipes 202 are fixedly connected. The other ends of multiple circulating water pipes 202 are fixedly connected to circulating water pumps 203. The other end of the circulating water pump 203 is fixedly connected to a refrigeration water tank 205. At all four corners of the bottom of the cooling water tank 201, fixing rods 204 are fixedly connected. The bottom of the fixing rod 204 is fixedly connected to the top of the refrigeration water tank 205. On the upper four walls of the cooling water tank 201, heat transfer pipes 206 are fixedly connected. On the other side of the heat transfer pipe 206, heat transfer fins 207 are fixedly connected. The outer wall of the heat transfer fin 207 is fixedly connected to the inner wall of the lower mold box 4. On the front side of the refrigeration water tank 205, a water inlet 209 is fixedly connected. On the rear side of the bottom of the refrigeration water tank 205, a drain outlet 208 is fixedly connected. Inside the inner wall of the water inlet 209, a water inlet filter 210 is fixedly connected. Inside the drain outlet 208, a drain filter 211 is fixedly connected;

[0036] Specifically, the outer wall of the heat transfer fin 207 is closely combined with the inner wall of the lower mold box 4 by a fixed connection method, so as to effectively transfer the heat of the cooling water to the lower mold box 4. To ensure the supply and discharge of the cooling water, a water inlet 209 is fixedly connected to the front side of the refrigeration water tank 205 so that the cooling water can smoothly enter the system. A drain outlet 208 is fixedly connected to the rear side of the bottom of the refrigeration water tank 205 to drain the used cooling water out of the system. To prevent impurities from entering the system, a water inlet filter 210 is fixedly connected to the inner wall of the water inlet 209 to ensure that the entering cooling water is clean. To prevent the drain outlet 208 from being blocked, a drain filter 211 is fixedly connected to the inside of the drain outlet 208 to ensure that the discharged cooling water is clean. The entire cooling cycle structure 2 can operate efficiently and stably to ensure the cooling effect of the mold.

[0037] Please refer to the appendix Figure 1 , appendix Figure 4 and appendix Figure 6 , at the top of the main runner 8, an injection port 9 is fixedly connected. In the middle of the base 1, a water tank groove 28 is opened. At the front end of the lower mold frame 3, a controller 14 is fixedly connected. The controller 14 is electrically connected to the telescopic rod 13, the motor 21, and the circulating water pump 203 respectively. At the four corners of the lower mold frame 3 and the upper mold frame 5, triangular grooves 24 are opened. At the bottom of the triangular groove 24, a screw 25 is rotatably connected. At the four corners of the bottom of the base 1, bottom columns 26 are fixedly connected. At the bottom end of the bottom column 26, a buffer pad 27 is fixedly connected;

[0038] Specifically, a screw 25 is rotatably connected to the bottom of the triangular groove 24, making the assembly and disassembly of the entire mold rack more convenient and rapid. At the four corners of the bottom of the base 1, bottom columns 26 are fixedly connected. The bottom columns 26 not only support the weight of the entire device but also ensure the stability of the device during operation. To further reduce the impact on the ground during device operation, a buffer pad 27 is fixedly connected to the bottom end of the bottom column 26. The buffer pad 27 can absorb part of the vibration, thereby extending the service life of the device and reducing the generation of noise.

[0039] Working principle: When performing an injection mold, press the controller 14 to make the motor 21 work, driving the rotating rod 22 to rotate. The rotation of the rotating rod 22 will stretch the transmission rod 20, causing the other end of the transmission rod 20 to drive the slider 18 to slide horizontally in the slide rail 17 of the limit strip 16. The sliding of the slider 18 drives the bent connecting rod 19 to move the heating sheets 23 towards each other, thereby approaching the outer wall of the main runner 8, enabling the injection material to flow smoothly in the main runner 8, ensuring that the molten plastic can flow smoothly, avoiding blockage and uneven flow, maintaining the plastic at an appropriate temperature, ensuring good fluidity, enabling the injection material to flow into the mold faster, ensuring the molding degree of the mold, improving production efficiency, reducing waste, and improving product quality.

[0040] When the injection mold is completed, start the controller 14 to make the circulating water pump 203 start working. The mold in the lower mold box 4 quickly transfers heat to the heat transfer sheet 207, and then through the heat transfer pipe 206 to the cooling water tank 201. The hot water in the cooling water tank 201 is transferred to the refrigeration water tank 205 through the circulating water pipe 202 by the circulating water pump 203. The refrigeration water tank 205 quickly cools the hot water and then circulates it back to the cooling water tank 201 through the circulating water pump 203, thereby quickly removing the heat of the mold, ensuring uniform cooling of the mold, reducing the mold temperature, shortening the cycle time, avoiding warping and shrink marks. The design of the temperature control system needs to cooperate with the cooling system of the mold to achieve the best molding effect.

[0041] 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 described 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 in the protection scope of the present invention.

Claims

1. A runner structure of an injection molding die for pet supplies, comprising a base (1), characterized in that: At the four corners of the top of the base (1), telescopic rods (13) are fixedly connected. The top of the telescopic rod (13) is fixedly connected with a lower mold frame (3). A connecting frame (12) is fixedly connected to the top of the base (1). The top of the connecting frame (12) is fixedly connected with a top plate (10). In the middle of the bottom end of the top plate (10), a main runner (8) is fixedly connected. Around the bottom of the main runner (8), sub-runners (7) are fixedly connected. At the four corners of the bottom end of the top plate (10), round support rods (11) are fixedly connected. The bottom end of the round support rod (11) is fixedly connected with an upper mold frame (5). The other ends of the plurality of sub-runners (7) are fixedly connected with the inner wall of the upper mold frame (5). At the top of the rear side of the upper mold frame (5), a square support column (15) is fixedly connected. The top of the square support column (15) is fixedly connected with a limiting strip (16). Sliding rails (17) are provided on both the upper and lower sides of the limiting strip (16). A slider (18) is slidably connected to the inner wall of the sliding rail (17). The left side of the slider (18) is fixedly connected with a bent connecting rod (19). The other end of the bent connecting rod (19) is fixedly connected with a heating sheet (23). In the middle of the rear side of the limiting strip (16), a motor (21) is fixedly connected. The output end of the motor (21) is fixedly connected with a rotating rod (22). Both ends of the rotating rod (22) are rotatably connected with a transmission rod (20). The other end of the transmission rod (20) is rotatably connected with the front side of the slider (18). At the four corners of the top of the lower mold frame (3), lower mold boxes (4) are provided. At the four corners of the bottom of the upper mold frame (5), upper mold boxes (6) are provided. A cooling circulation structure (2) is arranged at the bottom of the lower mold frame (3). The cooling circulation structure (2) is used to accelerate the cooling and shaping of the mold.

2. The runner structure of an injection molding die for pet supplies according to claim 1, wherein: The cooling circulation structure (2) includes a cooling water tank (201). The outer wall of the cooling water tank (201) is fixedly connected with the inner wall of the lower mold frame (3). At the two corners of the bottom of the cooling water tank (201), circulating water pipes (202) are fixedly connected. The other ends of the plurality of circulating water pipes (202) are fixedly connected with circulating water pumps (203). The other end of the circulating water pump (203) is fixedly connected with a refrigerating water tank (205). At the four corners of the bottom of the cooling water tank (201), fixing rods (204) are fixedly connected. The bottom of the fixing rod (204) is fixedly connected with the top of the refrigerating water tank (205). On the upper four walls of the cooling water tank (201), heat transfer pipes (206) are fixedly connected. The other side of the heat transfer pipe (206) is fixedly connected with a heat transfer fin (207). The outer wall of the heat transfer fin (207) is fixedly connected with the inner wall of the lower mold box (4).

3. The runner structure of an injection molding die for pet supplies according to claim 1, wherein: An injection port (9) is fixedly connected to the top of the main runner (8). A water tank groove (28) is provided in the middle of the base (1).

4. The runner structure of an injection molding die for pet supplies according to claim 1, characterized in that: A controller (14) is fixedly connected to the front end of the lower mold frame (3), and the controller (14) is electrically connected to the telescopic rod (13), the motor (21), and the circulating water pump (203) respectively.

5. A runner structure of an injection molding die for pet supplies according to claim 1, characterized in that: Triangular grooves (24) are formed at the four corners of the lower mold frame (3) and the upper mold frame (5), and screws (25) are rotatably connected to the bottoms of the triangular grooves (24).

6. The runner structure of an injection molding die for pet supplies according to claim 1, characterized in that: Bottom columns (26) are fixedly connected to the four corners of the bottom of the base (1), and buffer pads (27) are fixedly connected to the bottoms of the bottom columns (26).

7. The runner structure of an injection molding die for pet supplies according to claim 2, characterized in that: An inlet (209) is fixedly connected to the front side of the refrigeration water tank (205), and a drain outlet (208) is fixedly connected to the rear side of the bottom of the refrigeration water tank (205).

8. A runner structure of an injection molding die for pet supplies according to claim 7, characterized in that: An inlet filter screen (210) is fixedly connected to the inner wall of the inlet (209), and a drain filter screen (211) is fixedly connected to the inner wall of the drain outlet (208).

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