Forming die for powder metallurgy

Abstract

The utility model discloses a forming die for powder metallurgy, which comprises a die sleeve, a middle die is arranged in the die sleeve, an upper punch is arranged above the middle die, a lower punch is arranged below the middle die, a core rod is arranged in the lower punch, the middle die is of a circular truncated cone-shaped structure, a die cavity is arranged in the middle die, the middle die comprises two half die blocks which are symmetrically arranged, and the half die blocks are arranged in the die sleeve. A circular truncated cone groove corresponding to the middle die is formed in the die sleeve; according to the utility model, the middle mold is arranged into the circular truncated cone-shaped structure and consists of the two half mold blocks which are symmetrically arranged, and the two half mold blocks can be opened by separating the mold sleeve from the middle mold after the two half mold blocks are limited and formed through the mold sleeve, so that the demolding is convenient, and the mold is particularly suitable for demolding special-shaped products; the wedge-shaped grooves are formed in the upper ends of the contact faces of the two half modules respectively, the wedge-shaped blocks are inserted into the wedge-shaped grooves, the two half modules can be separated by knocking the wedge-shaped blocks, and demolding is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder metallurgy forming dies, and in particular relates to a forming die for powder metallurgy. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder as raw material, and then forms and sinters it to manufacture metal materials, composite materials and various types of products. Powder metallurgy is similar to the production of ceramics, both of which belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used in the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a vital role in the development of new materials.

[0003] In the prior art, the middle mold of the powder metallurgy forming mold is mostly an integrated structure. For some special-shaped products, such as special-shaped products with large or small ends, they cannot be demolded after pressing. Therefore, they can only be processed into semi-finished products through powder metallurgy and then formed, resulting in low production efficiency and high production costs. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a powder metallurgy forming die, which has the characteristic of being easy to demould for special-shaped products.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a powder metallurgy forming mold, including a mold sleeve, a middle mold is arranged inside the mold sleeve, an upper punch is arranged above the middle mold, a lower punch is arranged below the middle mold, a core rod is arranged inside the lower punch, the middle mold is a truncated cone structure, a mold cavity is arranged inside the middle mold, the middle mold includes two symmetrically arranged half modules, and a truncated cone groove corresponding to the middle mold is arranged inside the mold sleeve.

[0006] In order to facilitate demoulding, further, wedge-shaped grooves are respectively provided at the upper ends of the contact surfaces of the two half modules.

[0007] In order to add powder, further, a feeding hole is provided inside the upper punch.

[0008] In order to allow the core rod to be inserted, a central through hole is further provided inside the lower punch.

[0009] In order to exhaust the air in the mold cavity, further, the upper punch is provided with an exhaust hole connected with the feed hole.

[0010] In order to increase the exhaust effect, further, the exhaust hole includes a horizontal section and an inclined section, wherein the inclined section is located on a side connected to the exhaust hole.

[0011] In order to facilitate the lifting of the mold sleeve, two symmetrically arranged lifting rings are further connected to the top of the mold sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets the middle mold into a truncated cone structure, and is composed of two symmetrically arranged half modules. The two half modules are limited by the mold sleeve. After molding, the mold sleeve is separated from the middle mold, and the two half modules can be opened, so as to facilitate demoulding, which is particularly suitable for demoulding of special-shaped products;

[0014] 2. The upper ends of the contact surfaces of the two half modules of the utility model are respectively provided with wedge-shaped grooves. By inserting the wedge-shaped blocks into the wedge-shaped grooves and knocking the wedge-shaped blocks, the two half modules can be separated, making demoulding more convenient;

[0015] 3. The exhaust hole of the utility model includes a horizontal section and an inclined section, wherein the inclined section is located on the side connected to the exhaust hole, thereby increasing the exhaust effect;

[0016] 4. The upper part of the mold sleeve of the utility model is connected with two symmetrically arranged lifting rings, which is convenient for lifting the mold sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the upper punch of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the lower punch of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the mold sleeve of the utility model;

[0022] Figure 5 This is a structural schematic diagram of the middle mold of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the semi-module of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the mold sleeve of the utility model;

[0025] In the figure: 1. core rod; 2. middle die; 21. die cavity; 22. half die block; 23. wedge-shaped groove; 3. upper punch; 31. feed hole; 32. exhaust hole; 321. horizontal section; 322. inclined section; 4. die sleeve; 41. truncated cone groove; 42. lifting ring; 5. lower punch; 51. center through hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] See also Figure 1-7 The utility model provides the following technical solutions: a powder metallurgy forming mold, including a mold sleeve 4, a middle mold 2 is arranged inside the mold sleeve 4, an upper punch 3 is arranged above the middle mold 2, a lower punch 5 is arranged below the middle mold 2, a core rod 1 is arranged inside the lower punch 5, the middle mold 2 is a truncated cone structure, a mold cavity 21 is arranged inside the middle mold 2, the middle mold 2 includes two symmetrically arranged half modules 22, and a truncated cone groove 41 corresponding to the middle mold 2 is arranged inside the mold sleeve 4.

[0029] By adopting the above technical solution, the utility model sets the middle mold 2 into a truncated cone structure, and consists of two symmetrically arranged half modules 22. The two half modules 22 are limited by the mold sleeve 4. After molding, the mold sleeve 4 is separated from the middle mold 2, and the two half modules 22 can be opened, thereby facilitating demoulding, which is particularly suitable for demoulding of special-shaped products.

[0030] Specifically, wedge-shaped grooves 23 are respectively provided at the upper ends of the contact surfaces of the two half modules 22 .

[0031] By adopting the above technical solution, the two half modules 22 can be separated by inserting the wedge block into the wedge groove 23 and tapping the wedge block, making demoulding more convenient.

[0032] Specifically, a material feeding hole 31 is provided inside the upper punch 3 .

[0033] The above technical solution is used to add powder.

[0034] Specifically, a central through hole 51 is provided inside the lower punch 5 .

[0035] By adopting the above technical solution, the core rod 1 is inserted.

[0036] Specifically, the upper punch 3 is provided with a vent hole 32 connected to the feed hole 31 .

[0037] The above technical solution is used to discharge the air in the mold cavity 21.

[0038] Example 2

[0039] The difference between this embodiment and the first embodiment is that: specifically, the exhaust hole 32 includes a horizontal section 321 and an inclined section 322 , wherein the inclined section 322 is located at a side communicating with the exhaust hole 32 .

[0040] By adopting the above technical solution, the exhaust effect is improved.

[0041] Example 3

[0042] The present embodiment is different from the first embodiment in that: specifically, two symmetrically arranged hanging rings 42 are connected to the top of the mold sleeve 4 .

[0043] By adopting the above technical solution, it is convenient to hoist the mold sleeve 4.

[0044] In summary, the utility model sets the middle mold 2 into a truncated cone structure, and consists of two symmetrically arranged half modules 22. The two half modules 22 are limited by the mold sleeve 4. After molding, the mold sleeve 4 is separated from the middle mold 2, and the two half modules 22 can be opened, so as to facilitate demolding, which is particularly suitable for demolding of special-shaped products; the upper ends of the contact surfaces of the two half modules 22 of the utility model are respectively provided with wedge-shaped grooves 23, and the two half modules 22 can be separated by inserting the wedge blocks into the wedge-shaped grooves 23 and knocking the wedge blocks, so that demolding is more convenient; the exhaust hole 32 of the utility model includes a horizontal section 321 and an inclined section 322, wherein the inclined section 322 is located on the side connected to the exhaust hole 32, thereby increasing the exhaust effect; the upper part of the mold sleeve 4 of the utility model is connected with two symmetrically arranged lifting rings 42, which is convenient for lifting the mold sleeve 4.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A powder metallurgy forming die, comprising a die sleeve, characterized in that: A middle die is arranged inside the die sleeve, an upper punch is arranged above the middle die, a lower punch is arranged below the middle die, a core rod is arranged inside the lower punch, the middle die is a truncated cone structure, a die cavity is arranged inside the middle die, the middle die includes two symmetrically arranged half modules, and a truncated cone groove corresponding to the middle die is arranged inside the die sleeve.

2. A powder metallurgy forming die according to claim 1, characterized in that: The upper ends of the two half-module contact surfaces are respectively provided with wedge-shaped grooves.

3. A powder metallurgy forming die according to claim 1, characterized in that: A material feeding hole is arranged inside the upper punch.

4. The powder metallurgy forming die according to claim 1, characterized in that: A central through hole is arranged inside the lower punch.

5. The powder metallurgy forming die according to claim 1, characterized in that: The upper punch is provided with an exhaust hole which is communicated with the feed hole.

6. A powder metallurgy forming die according to claim 5, characterized in that: The exhaust hole comprises a horizontal section and an inclined section, wherein the inclined section is located at a side communicating with the exhaust hole.

7. The powder metallurgy forming die according to claim 1, characterized in that: Two symmetrically arranged hanging rings are connected to the top of the mold sleeve.

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