Efficient metal injection molding mold

Abstract

The utility model relates to the technical field of molds, in particular to a high-efficiency metal injection molding mold, which is characterized in that a fixed mold part comprises a fixed mold body and a plurality of fixed mold blocks, each fixed mold block provides a half model for the mold, a movable mold body provides a half model for the mold, and a complete model is formed when the movable mold body is combined with the fixed mold body and the fixed mold blocks; products with the same number as the fixed modules can be obtained through one-time injection operation; an injection molding material flows into the gap between the movable mold part and the fixed mold part and is injected into the four fixed mold blocks at the same time, four products can be obtained through one-time injection molding, and the output efficiency of the mold is improved; after injection is completed, cooling water is pumped into the upper water inlet and the lower water inlet correspondingly, the cooling water flows along the upper cooling pipe and the lower cooling pipe correspondingly, the upper cooling pipe exchanges heat with the movable mold body to reduce the temperature of the movable mold body, the lower cooling pipe exchanges heat with the fixed mold body to reduce the temperature of the fixed mold body, and the cooling part assists in cooling of the movable mold part and the fixed mold part; the cooling speed is accelerated, the cooling time is shortened, and the mold utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a high-efficiency metal injection molding mold. Background Art

[0002] Metal injection molding (MIM) is a process that utilizes the great molding ability of injection molding technology to manufacture structural metal components. Different from the molding of thermoplastics, the molded parts of thermoplastics are usually the final products, while the parts of metal injection molding must then be heat-treated to remove the polymer and sinter into dense structural parts. Both thermoplastic and MIM processes utilize temperature and pressure to form parts. Therefore, there are similarities between these two technologies in the science of shape forming. The metal injection molding process has many advantages. For example, for complex geometries, as long as the products can be formed by injection molds, the MIM process can be used for production and manufacturing, obtaining extremely high degrees of freedom in geometric shape design; suitable for mass production, the general production cycle of the MIM process is 5 - 7 days, and continuous supply can be achieved after one cycle, and the daily output can meet the requirements from several hundred to several hundred thousand per day according to demand; excellent material properties, the high density of MIM products enables them to have excellent material properties, which are basically close to the properties of plates, so they are particularly suitable for parts with special requirements for the use performance of products.

[0003] Most commonly used metal injection molding molds on the market can only form one product at a time, and the finished products in the mold are cooled externally, with a long cooling time, low mold utilization rate, and low output efficiency. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a high-efficiency metal injection molding mold to solve the problems of low mold utilization rate and low output efficiency proposed in the related technology.

[0005] To achieve the above purpose, according to one aspect of the utility model, a high-efficiency metal injection molding mold is provided, including: a fixed mold part, the fixed mold part includes a fixed mold body and a plurality of fixed mold blocks, the fixed mold blocks are all fixedly arranged on the upper surface of the fixed mold body, providing half of the model for the mold, and the fixed mold part provides support for the mold;

[0006] A moving mold part, the moving mold part includes a moving mold body, the moving mold body provides half of the model for the mold, and when the moving mold body is combined with the fixed mold body and the fixed mold blocks, a complete model is formed, and the number of products equal to the number of fixed mold blocks can be obtained in one injection operation;

[0007] A pouring part, the pouring part is located inside the moving mold part, providing a channel for the injection plastic to flow into the mold;

[0008] Cooling section, the cooling section includes an upper cooling group and a lower cooling group. The upper cooling group is fixedly arranged inside the moving die section. When cooling water is pumped into the upper cooling group, the moving die section can be cooled. The lower cooling group is fixedly arranged inside the fixed die section. When cooling water is pumped into the lower cooling group, the fixed die section can be cooled.

[0009] Furthermore, the pouring section includes a connected feed inlet, main runner, several branch runners and several gates. The number of the branch runners and gates is equal to the number of fixed die blocks.

[0010] Furthermore, the feed inlet is fixedly arranged at the top of the moving die section, and the main runner is fixedly arranged inside the moving die section and is located below the feed inlet.

[0011] Furthermore, one end of each branch runner is communicated with the main runner, and the other end is communicated with the gate. The injection plastic flows into the mold from the gate.

[0012] Furthermore, the moving die section further includes a top pressing block and a weight increasing block. The weight increasing block is fixedly arranged below the top pressing block to increase the self-weight of the moving die section. The moving die body is fixedly arranged below the weight increasing block.

[0013] Furthermore, the fixed die section further includes several support blocks, a counterweight block, a bottom plate, several limit posts and several springs. The number of the limit posts is equal to the number of the springs.

[0014] Furthermore, the support blocks are all fixedly arranged on the upper surface of the bottom plate, and the counterweight block is fixedly arranged on the upper surface of the bottom plate and is located in the middle of the support blocks.

[0015] Furthermore, the bottom ends of the limit posts are all fixedly connected with the counterweight block, and the top ends are connected with the fixed die body and can slide up and down along the inner hole of the fixed die body. The springs are all sleeved on the limit posts. The upper ends of the springs are fixedly connected with the fixed die body, and the lower ends are fixedly connected with the counterweight block.

[0016] Furthermore, the upper cooling group is fixedly arranged inside the moving die body. The upper cooling group includes an upper cooling pipe, an upper water inlet and an upper water outlet. The upper water inlet is arranged at one end of the upper cooling pipe, and the upper water outlet is arranged at the other end of the upper cooling pipe.

[0017] Furthermore, the lower cooling group is fixedly arranged inside the fixed die body. The lower cooling group includes a lower cooling pipe, a lower water inlet and a lower water outlet. The lower water inlet is arranged at one end of the lower cooling pipe, and the lower water outlet is arranged at the other end of the lower cooling pipe.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the injection molding material flows into the gap between the moving die part and the fixed die part, and at the same time, the injection molding material is injected into four fixed die blocks. Four products can be obtained by one injection molding, improving the output efficiency of the mold; after the injection is completed, cooling water is pumped into the upper water inlet and the lower water inlet respectively. The cooling water flows along the upper cooling pipe and the lower cooling pipe respectively. The upper cooling pipe exchanges heat with the moving die body to reduce the temperature of the moving die body, and the lower cooling pipe exchanges heat with the fixed die body to reduce the temperature of the fixed die body. The cooling part assists the moving die part and the fixed die part to cool down, speeds up the cooling speed, shortens the cooling time, and improves the utilization rate of the mold. Brief Description of the Drawings

[0019] Figure 1 is the overall schematic diagram of the utility model;

[0020] Figure 2 is the internal structure schematic diagram of the utility model;

[0021] Figure 3 is the structure schematic diagram of the pouring part of the utility model;

[0022] Figure 4 is the structure schematic diagram of the moving die part of the utility model;

[0023] Figure 5 is the structure schematic diagram of the fixed die part of the utility model;

[0024] Figure 6 is the structure schematic diagram of the cooling part of the utility model.

[0025] Illustration:

[0026] 1. Pouring part; 11. Feeding port; 12. Main runner; 13. Branch runner; 14. Gate;

[0027] 2. Moving die part; 21. Pressing top; 22. Weight increasing block; 23. Moving die body;

[0028] 3. Fixed die part; 31. Fixed die body; 32. Fixed die block; 33. Support block; 34. Counterweight block; 35. Bottom plate; 36. Limit post; 37. Spring;

[0029] 4. Cooling part; 41. Upper cooling pipe; 42. Upper water inlet; 43. Upper water outlet; 44. Lower cooling pipe; 45. Lower water inlet; 46. Lower water outlet. Detailed Embodiment

[0030] To further elaborate on the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manner, structure, features and their effects of the utility model as follows.

[0031] Please refer toFigures 1 to 6 , this embodiment provides an efficient metal injection molding die, including: a fixed die part 3, the fixed die part 3 includes a fixed die body 31 and several fixed die blocks 32. In this embodiment, four fixed die blocks 32 are preferably provided, and four products can be obtained in one injection operation, improving the output efficiency of the die. The fixed die blocks 32 are all fixedly arranged on the upper surface of the fixed die body 31, providing half of the model for the die, and the fixed die part 3 provides support for the die;

[0032] A moving die part 2, the moving die part 2 includes a moving die body 23, the moving die body 23 provides half of the model for the die, and when the moving die body 23 is combined with the fixed die body 31 and the fixed die blocks 32, a complete model is formed, and the number of products obtained in one injection operation is equal to the number of fixed die blocks 32;

[0033] A pouring part 1, the pouring part 1 is located inside the moving die part 2, providing a channel for the injection plastic to flow into the die;

[0034] A cooling part 4, the cooling part 4 includes an upper cooling group and a lower cooling group. The upper cooling group is fixedly arranged inside the moving die part 2. When cooling water is pumped into the upper cooling group, the moving die part 2 can be cooled. The lower cooling group is fixedly arranged inside the fixed die part 3. When cooling water is pumped into the lower cooling group, the fixed die part 3 can be cooled.

[0035] The pouring part 1 includes a connected feed inlet 11, a main runner 12, several sub-runners 13 and several gates 14. The number of sub-runners 13 and gates 14 is equal to the number of fixed die blocks 32. In this embodiment, four sub-runners 13 and four gates 14 are preferably provided. The injection plastic flows into the four gates 14 from the four sub-runners 13 respectively, and the four gates 14 inject the injection plastic into the fixed die blocks 32 respectively.

[0036] The feed inlet 11 is fixedly arranged at the top of the moving die part 2, and the main runner 12 is fixedly arranged inside the moving die part 2 and is located below the feed inlet 11. The injection plastic is injected into the main runner 12 from the feed inlet 11 and then enters the sub-runners 13 and gates 14 again.

[0037] One end of each sub-runner 13 is connected to the main runner 12, and the other end is connected to the gate 14. The injection plastic flows into the die from the gate 14.

[0038] The moving die part 2 further includes a top press 21 and a weight block 22. The weight block 22 is fixedly arranged below the top press 21, increasing the self-weight of the moving die part 2 and providing additional pressure for the die. The moving die body 23 is fixedly arranged below the weight block 22.

[0039] The fixed die part 3 further includes several support blocks 33, a counterweight block 34, a bottom plate 35, several limit posts 36 and several springs 37. The number of limit posts 36 is equal to the number of springs 37.

[0040] The support blocks 33 are all fixedly arranged on the upper surface of the bottom plate 35. In this embodiment, two support blocks 33 are preferably provided to provide balanced supporting force for the fixed mold body 31. The counterweight block 34 is fixedly arranged on the upper surface of the bottom plate 35 and is located in the middle of the support blocks 33, reducing the center of gravity of the mold and improving its stability.

[0041] The bottom ends of the limit posts 36 are fixedly connected to the counterweight block 34, and the top ends are connected to the fixed mold body 31 and can slide up and down along the inner hole of the fixed mold body 31. The springs 37 are all sleeved on the limit posts 36. The limit posts 36 limit the telescopic direction of the springs 37. The upper ends of the springs 37 are fixedly connected to the fixed mold body 31, and the lower ends are fixedly connected to the counterweight block 34. The springs 37 consume the pressure of the fixed mold body 31 on the support blocks 33 to prevent the support blocks 33 from being crushed due to excessive pressure.

[0042] The upper cooling group is fixedly arranged in the moving mold body 23. The upper cooling group includes an upper cooling pipe 41, an upper water inlet 42, and an upper water outlet 43. The upper water inlet 42 is arranged at one end of the upper cooling pipe 41, and the upper water outlet 43 is arranged at the other end of the upper cooling pipe 41. Cooling water enters the upper cooling pipe 41 from the upper water inlet 42, exchanges heat with the moving mold body 23, and then is discharged from the upper water outlet 43.

[0043] The lower cooling group is fixedly arranged in the fixed mold body 31. The lower cooling group includes a lower cooling pipe 44, a lower water inlet 45, and a lower water outlet 46. The lower water inlet 45 is arranged at one end of the lower cooling pipe 44, and the lower water outlet 46 is arranged at the other end of the lower cooling pipe 44. Cooling water enters the lower cooling pipe 44 from the lower water inlet 45, exchanges heat with the fixed mold body 31, and then is discharged from the lower water outlet 46.

[0044] Inject the injection molding material into the feed inlet 11. The injection molding material flows downward along the main runner 12, passes through each branch runner 13, then enters the gate 14, and flows into the gap between the moving mold part 2 and the fixed mold part 3. At the same time, inject the injection molding material into the four fixed mold blocks 32. Four products can be obtained in one injection molding, improving the output efficiency of the mold. After the gap is filled, stop injecting the injection molding material into the mold, and perform pressure holding and cooling on the mold. Pump cooling water into the upper water inlet 42 and the lower water inlet 45 respectively. The cooling water flows along the upper cooling pipe 41 and the lower cooling pipe 44 respectively. The upper cooling pipe 41 exchanges heat with the moving mold body 23 to reduce the temperature of the moving mold body 23. The lower cooling pipe 44 exchanges heat with the fixed mold body 31 to reduce the temperature of the fixed mold body 31. The cooling part 4 assists in cooling the moving mold part 2 and the fixed mold part 3, accelerating the cooling speed, shortening the cooling time, and improving the utilization rate of the mold. After the temperature drops, the injection molding material in the mold solidifies and forms. Unscrew the screws of the moving mold part 2, move the moving mold part 2 away from the fixed mold part 3, take out the model on the fixed mold part 3, and then install the moving mold part 2 back on the fixed mold part 3 and screw on the screws to fix it, and the next round of injection can be carried out.

[0045] As described above, it is merely a preferred embodiment of the present utility model and does not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An efficient metal injection molding die, characterized in that Comprising: The fixed mold part (3), the fixed mold part (3) includes a fixed mold body (31) and a plurality of fixed mold blocks (32), the fixed mold blocks (32) are all fixedly arranged on the upper surface of the fixed mold body (31), providing half of the mold, and the fixed mold part (3) provides support for the mold; The moving mold part (2), the moving mold part (2) includes a moving mold body (23), the moving mold body (23) provides half of the mold, and when the moving mold body (23) is combined with the fixed mold body (31) and the fixed mold blocks (32), a complete mold is formed, and the number of products equal to the number of fixed mold blocks (32) can be obtained in one injection operation; The pouring part (1), the pouring part (1) is located inside the moving mold part (2), providing a channel for the injection plastic to flow into the mold; The cooling part (4), the cooling part (4) includes an upper cooling group and a lower cooling group, the upper cooling group is fixedly arranged inside the moving mold part (2), when cooling water is pumped into the upper cooling group, the moving mold part (2) can be cooled, and the lower cooling group is fixedly arranged inside the fixed mold part (3), when cooling water is pumped into the lower cooling group, the fixed mold part (3) can be cooled.

2. The high-efficiency metal injection molding die according to claim 1, wherein The pouring part (1) includes a connected feed inlet (11), a main runner (12), a plurality of branch runners (13) and a plurality of gates (14), and the number of the branch runners (13) and the gates (14) is equal to the number of the fixed mold blocks (32).

3. The high-efficiency metal injection molding die according to claim 2, wherein The feed inlet (11) is fixedly arranged at the top of the moving mold part (2), and the main runner (12) is fixedly arranged inside the moving mold part (2) and is located below the feed inlet (11).

4. The high-efficiency metal injection molding die according to claim 2, wherein One end of each of the branch runners (13) is communicated with the main runner (12), and the other end is communicated with the gate (14), and the injection plastic flows into the mold from the gate (14).

5. The high-efficiency metal injection molding die according to claim 1, characterized in that, The moving mold part (2) further includes a pressing top (21) and a weight increasing block (22), the weight increasing block (22) is fixedly arranged below the pressing top (21) to increase the self-weight of the moving mold part (2), and the moving mold body (23) is fixedly arranged below the weight increasing block (22).

6. The high-efficiency metal injection molding die according to claim 1, characterized in that The fixed mold part (3) further includes a plurality of support blocks (33), a counterweight block (34), a bottom plate (35), a plurality of limit columns (36) and a plurality of springs (37), and the number of the limit columns (36) is equal to the number of the springs (37).

7. The high-efficiency metal injection molding die according to claim 6, wherein, The support blocks (33) are all fixedly arranged on the upper surface of the bottom plate (35), the counterweight block (34) is fixedly arranged on the upper surface of the bottom plate (35) and is located in the middle of the support blocks (33).

8. The high-efficiency metal injection molding die according to claim 6, wherein The bottom ends of the limit columns (36) are fixedly connected with the counterweight block (34), the top ends are connected with the fixed mold body (31) and can slide up and down along the inner hole of the fixed mold body (31), the springs (37) are all sleeved on the limit columns (36), the upper ends of the springs (37) are fixedly connected with the fixed mold body (31), and the lower ends are fixedly connected with the counterweight block (34).

9. The high-efficiency metal injection molding die according to claim 1, wherein The upper cooling group is fixedly arranged inside the moving mold body (23), the upper cooling group includes an upper cooling pipe (41), an upper water inlet (42) and an upper water outlet (43), the upper water inlet (42) is arranged at one end of the upper cooling pipe (41), and the upper water outlet (43) is arranged at the other end of the upper cooling pipe (41).

10. The high-efficiency metal injection molding die according to claim 1, characterized in that, The lower cooling group is fixedly arranged in the fixed mold body (31). The lower cooling group includes a lower cooling pipe (44), a lower water inlet (45) and a lower water outlet (46). The lower water inlet (45) is arranged at one end of the lower cooling pipe (44), and the lower water outlet (46) is arranged at the other end of the lower cooling pipe (44).

Images