Stable pressure maintaining mold

Abstract

The utility model relates to the technical field of molds, in particular to a stable pressure maintaining mold, which is characterized in that a mold part comprises a movable mold part and a fixed mold part, the movable mold part provides a half of a mold, the fixed mold part provides the other half of the mold, when the movable mold part and the fixed mold part are combined, a complete mold is formed, two side pressing blocks are respectively placed on two sides of a pressing plate and are tightened by screws, and the mold is formed. The pressing plate is fixed on the fixed module, so that the pressure of the pressing strip on the movable module is enhanced; the middle pressing block is placed in the middle of the two side pressing blocks, the middle pressing block is fixed to the pressing plate through screws, and the pressure of the pressing strip on the movable module is enhanced through the pressing plate; the upper pressing block is pushed inwards along the middles of the two side pressing blocks and fixed to the middle pressing block through screws, the movable mold part is firmly fixed to the upper portion of the fixed mold part through the fixing part, stable pressure is provided for injection molding, and the injection molding yield is increased. The two sprues inject injection molding materials into the gap between the fixed module and the movable module at the same time, the injection molding time is shortened, and the injection molding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly to a mold with stable pressure holding. Background Art

[0002] Metal injection molding (MIM) is a process that uses the great forming ability of injection molding technology to manufacture structural metal parts. Different from the molding of thermoplastics, the molded parts of thermoplastics are usually the final products, while the parts of metal injection molding must be subsequently heat-treated to remove the polymer and sinter into a dense structural part. Both thermoplastic and MIM processes use temperature and pressure to form parts. Therefore, there are similarities between these two technologies in the science of shape forming. Metal injection molding process has many advantages. For example, for complex geometries, as long as the products can be formed by injection molds, 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 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 it is especially suitable for parts with special requirements for product performance.

[0003] Most of the commonly used metal injection molding molds on the market are difficult to provide a constant pressure, and it is easy to push the mold apart during the injection molding process, resulting in defects in the injection molded products and affecting the quality of the finished products. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a mold with stable pressure holding, so as to solve the problem that most of the metal injection molding molds in the related technology are difficult to provide a constant pressure, and it is easy to push the mold apart during the injection molding process, resulting in defects in the injection molded products and affecting the quality of the finished products.

[0005] To achieve the above purpose, according to one aspect of the utility model, a mold with stable pressure holding is provided, including: a model part, the model part includes a moving mold part and a fixed mold part, the moving mold part provides half of the model, the fixed mold part provides the other half of the model, and when the moving mold part and the fixed mold part are combined, a complete model is formed;

[0006] A fixing part, the fixing part is located above the model part, the fixing part is fixed on the model part with screws, and the moving mold part is pressed on the fixed mold part; when the fixing part is removed from the model part, the moving mold part can be removed from the fixed mold part;

[0007] An extrusion part, the extrusion part is arranged above the fixing part and is connected to the model part with screws, pressing the fixing part and the moving mold part towards the fixed mold part;

[0008] The injection molding section is provided on top of the extrusion section and is in communication with the mold section. Through the injection molding section, injection molding materials can be injected into the mold section.

[0009] Further, the moving mold section includes a number of moving mold grooves and moving mold blocks. The moving mold grooves are all provided on the top of the moving mold blocks, and the fixing section fixes the moving mold blocks on the stationary mold section through the moving mold grooves.

[0010] Further, the stationary mold section includes a support group and a stationary mold group. The stationary mold group is fixedly provided above the support group and forms a complete mold together with the moving mold blocks.

[0011] Further, the support group includes a base, a number of heat dissipation holes, a counterweight block, and a number of support blocks. The support blocks are all fixedly provided at the edge of the upper surface of the base. The counterweight block is fixedly provided on the upper surface of the base and is located in the middle of the support blocks. The heat dissipation holes are all provided on the side surface of the base to provide a channel for air circulation.

[0012] Further, the stationary mold group includes a stationary mold block, a stationary mold groove, and a number of stationary mold grooves. The stationary mold block is fixedly provided above the support block. The stationary mold groove is provided in the middle of the upper part of the stationary mold block. When the moving mold block is placed in the stationary mold groove, a complete mold is formed.

[0013] Further, the stationary mold grooves are all provided on the upper surface of the stationary mold block. When the stationary mold grooves are aligned with the moving mold grooves, the fixing section can fix the moving mold blocks on the moving mold section.

[0014] Further, the fixing section includes four identical fixing components. The fixing components include pressing strips and pressurizing groups. The pressing strips are all provided in the stationary mold grooves and the moving mold grooves, and the moving mold blocks are fixed on the moving mold section through screws. The pressurizing groups are provided at the outer ends of the pressing strips to increase the pressure of the pressing strips.

[0015] Further, the pressurizing group includes a pressing plate, two side pressing blocks, a middle pressing block, and an upper pressing block. The pressing plate is fixedly provided at the outer end of the pressing strip. The side pressing blocks are respectively provided on both sides of the pressing plate through screws. The middle pressing block is provided at the front end of the middle upper part of the pressing plate through screws. The upper pressing block is provided at the rear end of the middle upper part of the pressing plate through screws.

[0016] Further, the extrusion section includes a pressing top, a protection block, and a weight increasing block. The protection block is fixedly provided below the pressing top. The weight increasing block is fixedly provided below the protection block to provide pressure for the moving mold section.

[0017] Further, the injection molding section includes a feed inlet, a main runner, a number of sub-runners, and a number of gates. The feed inlet is provided through the pressing top above. The main runner sequentially passes through the protection block and the weight increasing block and is in communication with the feed inlet. The sub-runners are all provided at the bottom end of the main runner. The gates are provided at the ends of the sub-runners.

[0018] Compared with the prior art, the utility model has the following beneficial effects: The fixed mold pressing grooves and the movable mold pressing grooves are on the same straight line. The pressing strips are sequentially placed on the movable mold pressing grooves and the fixed mold pressing grooves, and the screws are tightened to fix the movable mold block on the fixed mold block, forming a complete mold. The two side pressing blocks are respectively placed on both sides of the pressing plate and tightened with screws to fix the pressing plate on the fixed mold block, strengthening the pressure of the pressing strip on the movable mold block. The middle pressing block is placed in the middle of the two side pressing blocks and fixed on the pressing plate with screws, and the pressure of the pressing strip on the movable mold block is strengthened through the pressing plate. The upper pressing block is pushed inward along the middle of the two side pressing blocks and fixed on the middle pressing block with screws. The fixing part firmly fixes the movable mold part above the fixed mold part, providing stable pressure for injection molding and improving the yield of injection molding. The injection plastic is injected into the gap between the fixed mold block and the movable mold block through two gates at the same time, shortening the injection time and improving the injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0022] Figure 4 is the schematic diagram of the model part structure of the utility model Figure 1 ;

[0023] Figure 5 is the schematic diagram of the model part structure of the utility model Figure 2 ;

[0024] Figure 6 is the schematic diagram of the model part structure of the utility model Figure 3 ;

[0025] Figure 7 is the schematic diagram of the injection part structure of the utility model;

[0026] Figure 8 is the schematic diagram of the fixing part structure of the utility model.

[0027] Illustration description:

[0028] 1. Extrusion part; 11. Pressing top; 12. Protection block; 13. Weight increasing block;

[0029] 2. Model part; 21. Base; 22. Heat dissipation holes; 23. Counterweight; 24. Support block; 25. Fixed mold block; 26. Fixed mold groove; 27. Fixed mold pressing groove; 28. Movable mold pressing groove; 29. Movable mold block;

[0030] 3. Injection Molding Department; 31. Feed Inlet; 32. Main Runner; 33. Branch Runner; 34. Gate

[0031] 4. Fixing Department; 41. Batten; 42. Pressing Plate; 43. Side Pressing Block; 44. Middle Pressing Block; 45. Upper Pressing Block; 46. Spacer Block; 47. Ejector Block Detailed Implementation Manner

[0032] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manner, structure, features, and their effects of the present utility model as follows.

[0033] Please refer to Figures 1 to 8 , this embodiment provides a mold with stable pressure holding, including: a mold part 2, the mold part 2 includes a moving mold part and a fixed mold part, the moving mold part provides half of the mold, and the fixed mold part provides the other half of the mold. When the moving mold part and the fixed mold part are combined, a complete mold is formed;

[0034] A fixing department 4, the fixing department 4 is located above the mold part 2, the fixing department 4 is fixed to the mold part 2 with screws, and the moving mold part is pressed on the fixed mold part; when the fixing department 4 is removed from the mold part 2, the moving mold part can be removed from the fixed mold part;

[0035] An extrusion department 1, the extrusion department 1 is arranged above the fixing department 4 and is connected to the mold part 2 with screws, pressing the fixing department 4 and the moving mold part towards the fixed mold part;

[0036] An injection molding department 3, the injection molding department 3 is arranged on the top of the extrusion department 1 and is communicated with the mold part 2, and injection molding material can be injected into the mold part 2 through the injection molding department 3.

[0037] The moving mold part includes a plurality of moving mold pressing grooves 28 and moving mold blocks 29, the moving mold pressing grooves 28 are all arranged on the top of the moving mold blocks 29. In this embodiment, four moving mold pressing grooves 28 are preferably provided to increase the contact area with the fixing department 4, and the fixing department 4 fixes the moving mold blocks 29 on the fixed mold part through the moving mold pressing grooves 28.

[0038] The fixed mold part includes a support group and a fixed mold group, the fixed mold group is fixedly arranged above the support group and forms a complete mold with the moving mold blocks 29.

[0039] The support group includes a base 21, a plurality of heat dissipation holes 22, a counterweight 23, and a plurality of support blocks 24. In this embodiment, two support blocks 24 are preferably provided to provide a stable supporting force for the fixed mold group. The support blocks 24 are all fixedly arranged on the edge of the upper surface of the base 21, the counterweight 23 is fixedly arranged on the upper surface of the base 21 and is located in the middle of the support blocks 24, and the heat dissipation holes 22 are all arranged on the side surface of the base 21 to provide a channel for air circulation. In this embodiment, four heat dissipation holes 22 are preferably provided to increase the air circulation volume.

[0040] The fixed mold set includes a fixed mold block 25, a fixed mold groove 26, and a number of fixed mold pressing grooves 27. The fixed mold block 25 is fixedly arranged above the support block 24, and the fixed mold groove 26 is arranged in the middle above the fixed mold block 25. When the moving mold block 29 is placed in the fixed mold groove 26, a complete mold is formed.

[0041] The fixed mold pressing grooves 27 are all arranged on the upper surface of the fixed mold block 25. In this embodiment, four fixed mold pressing grooves 27 are preferably provided to increase the contact area with the fixing part 4. When the fixed mold pressing grooves 27 are aligned with the moving mold pressing grooves 28, the fixing part 4 can fix the moving mold block 29 to the moving mold part.

[0042] The fixing part 4 includes four identical fixing components. The fixing component includes a pressing strip 41 and a pressure increasing group. The pressing strips 41 are arranged in both the fixed mold pressing grooves 27 and the moving mold pressing grooves 28, and the moving mold block 29 is fixed to the moving mold part by screws. The pressure increasing group is arranged at the outer end of the pressing strip 41 to increase the pressure of the pressing strip 41 and provide the pressure maintaining ability of the mold.

[0043] The pressure increasing group includes a pressing plate 42, two side pressing blocks 43, a middle pressing block 44, and an upper pressing block 45. The pressing plate 42 is fixedly arranged at the outer end of the pressing strip 41. The side pressing blocks 43 are respectively arranged on both sides of the pressing plate 42 by screws. The middle pressing block 44 is arranged at the front end of the middle above the pressing plate 42 by screws. The upper pressing block 45 is arranged at the rear end of the middle above the pressing plate 42 by screws. A cushion block 46 is arranged outside the pressure increasing group on the front side, and a top block 47 is arranged outside the cushion block 46 to squeeze the pressure increasing group on the front side inward to enhance the pressure of the pressure increasing group.

[0044] The extrusion part 1 includes a pressing top 11, a protection block 12, and a weight increasing block 13. The protection block 12 is fixedly arranged below the pressing top 11, and the weight increasing block 13 is fixedly arranged below the protection block 12 to provide pressure for the moving mold part and ensure the pressure and temperature of the mold.

[0045] The injection molding part 3 includes a feed inlet 31, a main runner 32, a number of branch runners 33, and a number of gates 34. In this embodiment, two branch runners 33 and two gates 34 are preferably provided to inject injection molding material into the mold simultaneously to speed up the injection molding speed. The feed inlet 31 penetrates and is arranged above the pressing top 11. The main runner 32 sequentially passes through the protection block 12 and the weight increasing block 13 and is communicated with the feed inlet 31. The branch runners 33 are all arranged at the bottom end of the main runner 32, and the gates 34 are arranged at the ends of the branch runners 33.

[0046] Place the moving mold part above the fixed mold part, with the moving mold block 29 located within the fixed mold groove 26. Rotate the moving mold block 29 so that the fixed mold pressing grooves 27 are respectively in a straight line with the moving mold pressing grooves 28. Place the pressing strips 41 on the moving mold pressing grooves 28 and the fixed mold pressing grooves 27 in sequence, tighten the screws, and fix the moving mold block 29 on the fixed mold block 25 to form a complete mold; place the two side pressing blocks 43 on both sides of the pressing plate 42 respectively and tighten them with screws to fix the pressing plate 42 on the fixed mold block 25, strengthening the pressure of the pressing strip 41 on the moving mold block 29; place the middle pressing block 44 in the middle of the two side pressing blocks 43 and fix the middle pressing block 44 on the pressing plate 42 with screws, strengthening the pressure of the pressing strip 41 on the moving mold block 29 through the pressing plate 42; push the upper pressing block 45 inward along the middle of the two side pressing blocks 43 and fix it on the middle pressing block 44 with screws. The fixing part 4 firmly fixes the moving mold part above the fixed mold part, providing stable pressure for injection molding and improving the yield rate of injection molding; inject the injection material into the feed inlet 31. The injection material flows downward along the main runner 32, enters the gate 34 after passing through each branch runner 33, and the two gates 34 simultaneously inject the injection material into the gap between the fixed mold block 25 and the moving mold block 29, shortening the injection molding time and improving the injection molding efficiency.

[0047] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to it as equivalent embodiments within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A mold with stable pressure holding, characterized in that Comprising: A model part (2), the model part (2) includes a moving die part and a fixed die part. The moving die part provides half of the model, and the fixed die part provides the other half of the model. When the moving die part and the fixed die part are combined, a complete model is formed; A fixing part (4), the fixing part (4) is located above the model part (2). The fixing part (4) is fixed to the model part (2) with screws, and the moving die part is pressed onto the fixed die part; when the fixing part (4) is removed from the model part (2), the moving die part can be removed from the fixed die part; An extrusion part (1), the extrusion part (1) is arranged above the fixing part (4) and is connected to the model part (2) by screws to press the fixing part (4) and the moving die part towards the fixed die part; An injection molding part (3), the injection molding part (3) is arranged at the top of the extrusion part (1) and is communicated with the model part (2). Through the injection molding part (3), injection molding material can be injected into the model part (2).

2. The stable pressure-maintaining mold according to claim 1, wherein The moving die part includes a number of moving die pressing grooves (28) and moving die blocks (29). The moving die pressing grooves (28) are all arranged at the top of the moving die blocks (29). The fixing part (4) fixes the moving die blocks (29) to the fixed die part through the moving die pressing grooves (28).

3. The mold with stable pressure holding according to claim 2, characterized in that, The fixed die part includes a support group and a fixed die group. The fixed die group is fixedly arranged above the support group and forms a complete model with the moving die blocks (29).

4. The mold with stable pressure holding according to claim 3, characterized in that, The support group includes a base (21), a number of heat dissipation holes (22), a counterweight block (23) and a number of support blocks (24). The support blocks (24) are all fixedly arranged at the edge of the upper surface of the base (21). The counterweight block (23) is fixedly arranged on the upper surface of the base (21) and is located in the middle of the support blocks (24). The heat dissipation holes (22) are all arranged on the side surface of the base (21) to provide a channel for air circulation.

5. The mold with stable pressure holding according to claim 3, characterized in that, The fixed die group includes fixed die blocks (25), fixed die grooves (26) and a number of fixed die pressing grooves (27). The fixed die blocks (25) are fixedly arranged above the support blocks (24). The fixed die grooves (26) are arranged in the middle of the upper part of the fixed die blocks (25). When the moving die blocks (29) are placed in the fixed die grooves (26), a complete model is formed.

6. The mold with stable pressure holding according to claim 5, characterized in that The fixed die pressing grooves (27) are all arranged on the upper surface of the fixed die blocks (25). When the fixed die pressing grooves (27) are aligned with the moving die pressing grooves (28), the fixing part (4) can fix the moving die blocks (29) to the moving die part.

7. The mold with stable pressure holding according to claim 6, characterized in that, The fixing part (4) includes four identical fixing components. The fixing component includes a pressing strip (41) and a pressure increasing group. The pressing strips (41) are all arranged in the fixed die pressing grooves (27) and the moving die pressing grooves (28) to fix the moving die blocks (29) to the moving die part with screws. The pressure increasing group is arranged at the outer end of the pressing strip (41) to increase the pressure of the pressing strip (41).

8. The mold with stable pressure holding according to claim 7, characterized in that, The pressure increasing group includes a pressing plate (42), two side pressing blocks (43), a middle pressing block (44) and an upper pressing block (45). The pressing plate (42) is fixedly arranged at the outer end of the pressing strip (41). The side pressing blocks (43) are respectively arranged on both sides of the pressing plate (42) with screws. The middle pressing block (44) is arranged at the front end of the middle part above the pressing plate (42) with screws. The upper pressing block (45) is arranged at the rear end of the middle part above the pressing plate (42) with screws.

9. The mold with stable pressure holding according to claim 1, characterized in that The extrusion part (1) includes a pressing top (11), a protection block (12) and a weight increasing block (13). The protection block (12) is fixedly arranged below the pressing top (11), and the weight increasing block (13) is fixedly arranged below the protection block (12) to provide pressure for the moving die part.

10. The mold with stable pressure holding according to claim 1, wherein, The injection molding part (3) includes a feed inlet (31), a main runner (32), a plurality of branch runners (33) and a plurality of gates (34). The feed inlet (31) is arranged through above the pressing top (11). The main runner (32) sequentially passes through the protection block (12) and the weight increasing block (13) and is communicated with the feed inlet (31). The branch runners (33) are all arranged at the bottom end of the main runner (32), and the gates (34) are arranged at the ends of the branch runners (33).

Images