A rapid prototyping mold for a plastic shell

Abstract

This utility model relates to the field of injection molds, specifically to a rapid prototyping mold for plastic shells, including an upper mold and a lower mold. The lower mold is equipped with a cooling mechanism, the upper mold has an injection cavity, and the lower mold has a molding cavity. A high-efficiency cooling circulation system is constructed through a cooling mechanism consisting of dual-sided circulating fans and copper pipes, significantly shortening the cooling time. The tight fit between the sealing frame around the injection cavity and the sealing groove around the molding cavity prevents leakage of plastic raw materials during injection, avoiding surface defects and dimensional deviations in the product, significantly reducing the defect rate, and improving product consistency and pass rate. A precise positioning mechanism prevents the positioning rod from being damaged by collision during mold closing, extending the mold's service life, maintaining long-term stable mold operation, and ensuring consistently stable product quality.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to a rapid prototyping mold for plastic shells. Background Technology

[0002] In the plastic products industry, plastic casings are an important component of various electronic products and daily necessities, and the performance of the molds used in their production directly affects product quality and production efficiency. However, traditional plastic casing molding dies have revealed two major problems in practical applications, severely hindering the further development of the industry.

[0003] Traditional molds lack scientifically effective cooling systems, leaving plastic casings reliant solely on natural heat dissipation after injection molding. This process is extremely slow; for example, natural cooling typically takes 10-15 minutes for the production of small plastic products like mobile phone casings. This lengthy cooling cycle significantly reduces production efficiency and severely limits companies' capacity expansion.

[0004] During the injection molding process, the inner mold of the mold cavity may need to be replaced depending on order requirements. After each replacement, the upper and lower molds need to be re-merged and fitted. During each connection between the mold closing positioning rod and the positioning hole, accidental impacts may occur due to operational errors. If the positioning rod is damaged, its dimensional accuracy and perpendicularity will be affected. Furthermore, this will lead to a decrease in the positioning accuracy of the mold during subsequent mold closing processes, causing mold offset problems. This not only prevents the various parts of the mold from fitting tightly, affecting the sealing of the injection molded product, but also results in quality defects such as flash and dimensional inconsistencies in the injection molded product. Utility Model Content

[0005] The purpose of this invention is to provide a rapid prototyping mold for plastic shells, in order to solve the problems mentioned in the background art, such as the lack of a cooling system in traditional plastic shell molding molds, which rely on natural heat dissipation, resulting in a long cooling cycle, and the potential damage to the positioning rod due to misalignment during the mold closing process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid prototyping mold for a plastic shell, comprising an upper mold and a lower mold, wherein the lower mold is provided with a cooling mechanism, the upper mold is provided with an injection cavity, and the lower mold is provided with a molding cavity.

[0007] As a preferred embodiment of this utility model, a sealing frame is provided around the injection cavity, a sealing groove is provided around the cavity, a positioning block is provided at the four corners of the upper mold, a pair of positioning rods are provided at the bottom of the positioning block, a positioning block is provided around the lower mold, a pair of positioning holes are provided on the positioning block, a positioning body is provided on both sides of the upper mold, a pair of telescopic positioning rods are provided at the bottom of the support block, a positioning body is provided on both sides of the lower mold, and a pair of positioning holes are provided on the positioning body.

[0008] In a preferred embodiment of this utility model, the telescopic positioning rod includes a fixed cylinder, a return spring is provided inside the fixed cylinder, one end of the return spring is connected to a movable rod, and the movable rod is movably disposed inside the fixed cylinder.

[0009] In a preferred embodiment of this invention, the cooling mechanism includes a dual-sided circulating fan. The output end of the dual-sided circulating fan is connected to an air inlet pipe. The two ends of the lower mold are respectively provided with an air inlet distributor and an air outlet distributor. The other end of the air inlet pipe is connected to the input end of the air inlet distributor. The output end of the air inlet distributor is connected to several copper pipes. The several copper pipes pass through the bottom of the lower mold and are connected to the air outlet distributor. One side of the air outlet distributor is connected to an air outlet pipe, and the other end of the air outlet pipe is connected to the input end of the dual-sided circulating fan.

[0010] As a preferred embodiment of this utility model, a tooling mounting block is provided between the positioning block two and the positioning body two of the lower mold, a pair of mounting blocks are provided at both ends of the upper part of the upper mold, the mounting blocks are provided with several mounting holes, and a pair of lifting handles are provided on both sides of the upper part of the upper mold.

[0011] As a preferred embodiment of this utility model, the top of the upper mold is provided with a sprue sleeve, and an injection hole communicating with the injection cavity is opened in the sprue sleeve.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0013] 1. A high-efficiency cooling circulation system is constructed through a cooling mechanism consisting of dual-sided circulating fans and copper pipes, which greatly shortens the cooling time.

[0014] 2. By tightly fitting the sealing frame around the injection cavity with the sealing groove around the cavity, leakage of plastic raw materials during the injection process is prevented, avoiding surface defects and dimensional deviations in the product, significantly reducing the defect rate, and improving product consistency and pass rate.

[0015] 3. The precise positioning mechanism prevents the positioning rod from being damaged by collision during the mold closing process, extends the service life of the mold, maintains the long-term stable operation of the mold, and ensures that the product quality remains stable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a structural diagram of the upper mold;

[0018] Figure 3 This is a diagram of the bottom structure of the upper mold;

[0019] Figure 4 This is a frontal view of the upper mold and a half-sectional view of the telescopic positioning rod;

[0020] Figure 5 Here is a structural diagram of the lower mold;

[0021] Figure 6 This is a cross-sectional view of the lower mold section.

[0022] Reference numerals: 1. Upper mold; 2. Lower mold; 3. Cooling mechanism; 4. Injection cavity; 5. Sealing frame; 6. Cavity; 7. Sealing groove; 8. Positioning block one; 9. Positioning rod two; 10. Positioning hole one; 11. Positioning body one; 12. Telescopic positioning rod; 13. Fixed cylinder 13-1; Return spring 13-2; Moving rod 13-3; Positioning body two; 14. Positioning hole two; 15. Dual-sided circulating fan; 16. Air inlet pipe; 17. Air inlet distributor; 18. Copper pipe; 19. Air outlet distributor; 20. Air outlet pipe; 21. Tooling mounting block; 22. Mounting block; 23. Mounting hole; 24. Lifting handle; 25. Sprue sleeve; 26. Injection hole; 27. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0024] This utility model provides a technical solution: a rapid prototyping mold for plastic shells, such as... Figure 1 , Figure 3 , Figure 5 As shown, it includes an upper mold 1 and a lower mold 2. The lower mold 2 is equipped with a cooling mechanism 3. The upper mold 1 is equipped with an injection cavity 4, and the lower mold 2 is equipped with a molding cavity 6.

[0025] like Figures 2-6 As shown, the injection cavity 4 is surrounded by a sealing frame 5, the cavity 6 is surrounded by a sealing groove 7, the upper mold 1 is provided with positioning blocks 8 at its four corners, and a pair of positioning rods 9 are provided at the bottom of the positioning blocks 8. The lower mold 2 is provided with positioning blocks 10 around its perimeter, and a pair of positioning holes 11 are provided on the positioning blocks 10. The upper mold 1 is provided with positioning bodies 12 on both sides, and a pair of telescopic positioning rods 13 are provided at the bottom of the support block below the positioning bodies 12. The lower mold 2 is provided with positioning bodies 14 on both sides, and a pair of positioning holes 15 are provided on the positioning bodies 14.

[0026] like Figure 4As shown, the telescopic positioning rod 13 includes a fixed cylinder 13-1, a return spring 13-2 is provided inside the fixed cylinder 13-1, one end of the return spring 13-2 is connected to a moving rod 13-3, and the moving rod 13-3 is movably disposed inside the fixed cylinder 13-1.

[0027] like Figure 5 , Figure 6 As shown, the cooling mechanism 3 includes a dual-sided circulating fan 16. The output end of the dual-sided circulating fan 16 is connected to an air inlet pipe 17. The two ends of the lower mold 2 are respectively provided with an air inlet distributor 18 and an air outlet distributor 20. The other end of the air inlet pipe 17 is connected to the input end of the air inlet distributor 18. The output end of the air inlet distributor 18 is connected to several copper pipes 19. The several copper pipes 19 pass through the bottom of the lower mold 2 and are connected to the air outlet distributor 20. One side of the air outlet distributor 20 is connected to an air outlet pipe 21. The other end of the air outlet pipe 21 is connected to the input end of the dual-sided circulating fan 16.

[0028] like Figure 1 , Figure 2 As shown, a tooling mounting block 22 is provided between the positioning block 2 10 and the positioning body 2 14 of the lower mold 2, and a pair of mounting blocks 23 are provided at both ends of the upper part of the upper mold 1. Several mounting holes 24 are provided on the mounting blocks 23, and a pair of lifting handles 25 are provided on both sides of the upper part of the upper mold 1.

[0029] like Figure 2 , Figure 3 As shown, the top of the upper mold 1 is provided with a sprue sleeve 26, and an injection hole 27 communicating with the injection cavity 4 is opened in the sprue sleeve 26.

[0030] In practice, during mold assembly, the operator can use the lifting handle 25 of the upper mold 1, along with a crane or hoisting equipment, and the mounting block 23 to install the upper mold 1 into the designated position on the injection molding machine. Then, the injection molding machine is started, and the upper mold 1 is slowly lowered. Because the telescopic positioning rod 13 is longer than the positioning rod 9, it will first contact and insert into the positioning hole 15 of the positioning body 14 of the lower mold 2, providing initial mold positioning and preventing damage to the positioning rod 9 due to misalignment during installation. Next, the positioning rods 9 at the four corners of the upper mold 1 are accurately inserted into the positioning hole 11 of the positioning block 10 of the lower mold 2 for further precise alignment. Simultaneously, the sealing frame 5 around the injection cavity 4 of the upper mold 1 is inserted into the sealing groove 7 around the cavity 6 of the lower mold, creating a tight sealing structure. The sprue sleeve 26 also helps prevent material overflow during injection.

[0031] After the mold assembly is completed, the injection molding operation can be carried out. The plastic raw material is injected into the injection cavity 4 of the upper mold 1 through the injection hole 27 of the sprue sleeve 26. The equipment is started to close the upper mold 1 and the lower mold 2. The plastic raw material is filled and shaped in the space formed by the injection cavity 4 and the mold cavity 6.

[0032] During the molding process of the plastic shell, the dual-sided circulating fans 16 are turned on. The fans drive air through the air inlet pipe 17 into the air inlet distributor 18, then through the copper pipe 19 to carry away the heat from the mold, and finally through the air outlet pipe 21 back to the fans, forming a circulating cooling system that significantly improves the cooling speed and shortens the molding cycle. After the plastic shell has cooled and solidified, the mold is opened, and the operator removes the molded plastic shell.

[0033] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A rapid prototyping mold for a plastic housing, characterized by: It includes an upper mold (1) and a lower mold (2), the lower mold (2) is provided with a cooling mechanism (3), the upper mold (1) is provided with an injection cavity (4), and the lower mold (2) is provided with a molding cavity (6). The cooling mechanism (3) includes a double-sided circulating fan (16), the output end of which is connected to an air inlet pipe (17). The two ends of the lower mold (2) are respectively provided with an air inlet distributor (18) and an air outlet distributor (20). The other end of the air inlet pipe (17) is connected to the input end of the air inlet distributor (18). The output end of the air inlet distributor (18) is connected to several copper pipes (19). Several copper pipes (19) pass through the bottom of the lower mold (2) and are connected to the air outlet distributor (20). One side of the air outlet distributor (20) is connected to an air outlet pipe (21), and the other end of the air outlet pipe (21) is connected to the input end of the double-sided circulating fan (16).

2. The rapid prototyping mold for plastic shell according to claim 1, wherein: The injection cavity (4) is provided with a sealing frame (5) around it, the cavity (6) is provided with a sealing groove (7) around it, the upper mold (1) is provided with a positioning block (8) at the four corners, the bottom of the positioning block (8) is provided with a pair of positioning rods (9), the lower mold (2) is provided with a positioning block (10) around it, the positioning block (10) is provided with a pair of positioning holes (11), the upper mold (1) is provided with a positioning body (12) on both sides, the bottom of the support block below the positioning body (12) is provided with a pair of telescopic positioning rods (13), the lower mold (2) is provided with a positioning body (14) on both sides, the positioning body (14) is provided with a pair of positioning holes (15).

3. The rapid prototyping mold for plastic shell according to claim 2, wherein: The telescopic positioning rod (13) includes a fixed cylinder (13-1), a return spring (13-2) is provided inside the fixed cylinder (13-1), one end of the return spring (13-2) is connected to a moving rod (13-3), and the moving rod (13-3) is movably disposed inside the fixed cylinder (13-1).

4. The rapid prototyping mold for plastic shell according to claim 3, wherein: The lower mold (2) has a tooling mounting block (22) between the positioning block two (10) and the positioning body two (14). The upper mold (1) has a pair of mounting blocks (23) at both ends of the upper part. The mounting blocks (23) have several mounting holes (24). The upper mold (1) has a pair of lifting handles (25) on both sides of the upper part.

5. The rapid prototyping mold for plastic shell according to claim 4, wherein: The top of the upper mold (1) is provided with a sprue sleeve (26), and the sprue sleeve (26) is provided with an injection hole (27) that connects to the injection cavity (4).

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