Hot pressing sintering mold and hot pressing sintering pressurizing device

Abstract

The utility model discloses a hot pressing sintering mould and hot pressing sintering pressure device, the hot pressing sintering mould comprises an outer sleeve with a first through hole and an inner sleeve with a second through hole, the inner sleeve is installed in the first through hole in a sleeved mode, the aperture of the first through hole is gradually increased from one axial end to the other axial end, and the diameter of the second through hole is larger than the diameter of the second through hole. The outer side face of the inner sleeve is a conical face attached to the inner wall of the first through hole. The hot-pressing sintering pressurizing device comprises a supporting disc, a mold, an upper pressing head and a lower pressing head connected with the supporting disc, the mold is the hot-pressing sintering mold, one end of the outer sleeve and one end of the inner sleeve of the hot-pressing sintering mold abut against the end face of the supporting disc, and the upper pressing head is used for stretching into the second through hole from the end, away from the supporting disc, of the inner sleeve for pressurizing. The utility model has the advantages of convenient loading and unloading, difficult damage, and the like, and is favorable for reducing production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing and sintering equipment, in particular to a hot pressing and sintering mould and a hot pressing and sintering pressurizing device. Background Art

[0002] Hot pressing and sintering is a common method for preparing products such as high-performance ceramics and powder metallurgy materials. Hot pressing and sintering molds are necessary molds for preparing materials by hot pressing and sintering. Hot pressing and sintering molds generally include an outer sleeve and an inner sleeve made of graphite. The inner sleeve is arranged in the through hole of the outer sleeve. During hot pressing and sintering, the material is placed in the cylindrical through hole of the inner sleeve. Two pressure heads are used to pressurize the material from both axial ends of the inner sleeve, and the material is heated and sintered in a sintering furnace at the same time, thereby performing hot pressing and sintering. In the existing hot pressing and sintering mold, the outer sleeve adopts a cylindrical hole, the outer side surface of the inner sleeve is a cylindrical surface, and the inner sleeve is arranged in the outer sleeve to form a cylindrical surface contact with the through hole of the outer sleeve. Since the inner sleeve needs to be removed from the outer sleeve after hot pressing and sintering is completed, this structural form is difficult to remove the inner sleeve from the outer sleeve and the material from the inner sleeve in actual production. The outer sleeve and the inner sleeve are easily damaged during removal, resulting in increased production costs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a hot pressing sintering mold and a hot pressing sintering pressurizing device which are convenient for loading and unloading, not easy to be damaged and are conducive to reducing production costs.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A hot pressing sintering mold comprises an outer sleeve having a first through hole and an inner sleeve having a second through hole, wherein the inner sleeve is installed in the first through hole, the aperture of the first through hole gradually increases from one axial end to the other end, and the outer side surface of the inner sleeve is a conical surface that fits the inner wall of the first through hole.

[0006] As a further improvement of the above hot pressing sintering mold:

[0007] The cone angle of the conical surface is 1° to 2°.

[0008] The cone angle of the conical surface is 1.4°.

[0009] The side wall of the inner sleeve has a disconnection slit arranged along the axial direction.

[0010] The axial ends of the outer sleeve and the inner sleeve are flush.

[0011] A hot pressing and sintering pressure device comprises a support plate, a mold, an upper pressure head and a lower pressure head connected to the support plate, the mold is the above-mentioned hot pressing and sintering mold, the outer sleeve and one end of the inner sleeve of the hot pressing and sintering mold are against the end surface of the support plate, and the upper pressure head is used to extend from the end of the inner sleeve away from the support plate into the second through hole for pressurization.

[0012] As a further improvement of the above hot pressing sintering pressurizing device:

[0013] The hot pressing and sintering pressurizing device further comprises a plurality of pads which can be selectively inserted into the second through holes of the inner sleeve.

[0014] At least two of the plurality of pads have different thicknesses.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] The hot pressing sintering mold of the utility model has a first through hole of an outer sleeve whose aperture gradually increases from one axial end to the other end, and an outer side surface of an inner sleeve is a conical surface fitted with an inner wall of the first through hole, so that the inner sleeve can be quickly and conveniently loaded and unloaded from the large diameter end of the first through hole, and the outer sleeve is not easily damaged when loading and unloading the inner sleeve, which is conducive to reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the hot pressing and sintering mold in Example 1.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer jacket in Example 1.

[0019] Figure 3 This is a schematic cross-sectional structural diagram of the inner sleeve in Example 1.

[0020] Figure 4 This is a schematic diagram of the main structure of the inner sleeve in Example 1.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the hot pressing and sintering pressure device in Example 2.

[0022] Legend:

[0023] 1. Outer sleeve; 11. First through hole; 2. Inner sleeve; 21. Second through hole; 22. Outer side surface; 23. Disconnection seam; 3. Support plate; 4. Upper pressure head; 5. Lower pressure head; 6. Pad. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiment 1:

[0026] like Figures 1 to 3 As shown, the hot pressing sintering mold of this embodiment includes an outer sleeve 1 with a first through hole 11 and an inner sleeve 2 with a second through hole 21. The inner sleeve 2 is sleeved and installed in the first through hole 11. The aperture of the first through hole 11 gradually increases from one axial end to the other end, that is, the first through hole 11 is a conical hole. The outer side surface 22 of the inner sleeve 2 is a conical surface that fits the inner wall of the first through hole 11, that is, the release surface between the outer side surface 22 of the inner sleeve 2 and the inner wall of the first through hole 11 is a conical surface. Figures 1 to 3 In the figure, R1 represents the diameter of the large diameter end of the first through hole 11 and the diameter of the large diameter end of the outer side surface 22, R2 represents the diameter of the small diameter end of the first through hole 11 and the diameter of the small diameter end of the outer side surface 22, R1>R2, R3 represents the diameter of the second through hole 21, and the second through hole 21 is a cylindrical hole. In the hot pressing sintering mold, the diameter of the first through hole 11 of the outer sleeve 1 gradually increases from one axial end to the other end, and the outer side surface 22 of the inner sleeve 2 is a conical surface that fits the inner wall of the first through hole 11. The inner sleeve 2 can be quickly and conveniently installed and removed from the large diameter end of the first through hole 11, and the outer sleeve 1 is not easily damaged when installing and removing the inner sleeve 2, which is conducive to reducing production costs.

[0027] In this embodiment, the cone angle of the conical surface is 1° to 2°. Since the release surface between the outer side surface 22 of the inner sleeve 2 and the inner wall of the first through hole 11 is a conical surface, when the material installed in the second through hole 21 of the inner sleeve 2 is pressurized, a component force will be generated to make the inner sleeve 2 separate from the first through hole 11. The cone angle of the conical surface is 1° to 2°, which ensures that the inner sleeve 2 is easy to load and unload, and the generated component force will not cause the inner sleeve 2 to fall out, ensuring that the hot pressing sintering work is stable and reliable, and extending the service life of the outer sleeve 1 and the inner sleeve 2. Preferably, the cone angle of the conical surface is 1.4°, which has the best effect.

[0028] In this embodiment, Figure 4 As shown, the side wall of the inner sleeve 2 has a disconnection slit 23 arranged along the axial direction, which facilitates the removal of the product in the second through hole 21 of the inner sleeve 2. When the inner sleeve 2 is inserted into the first through hole 11 of the outer sleeve 1, the end surfaces of the side wall of the inner sleeve 2 located on both sides of the disconnection slit 23 are tightly attached to each other, ensuring that the second through hole 21 of the inner sleeve 2 is a complete through hole to avoid material leakage.

[0029] In this embodiment, the axial ends of the outer sleeve 1 and the inner sleeve 2 are flush, which not only has a good appearance, but also the ends of the outer sleeve 1 and the inner sleeve 2 can be simultaneously positioned against the support member to ensure stable and reliable operation.

[0030] Embodiment 2:

[0031] like Figure 5As shown, the hot pressing and sintering pressurizing device of this embodiment comprises a support plate 3, a mold, an upper pressing head 4 and a lower pressing head 5 connected to the support plate 3. The mold is the hot pressing and sintering mold of Example 1. One end of the outer sleeve 1 and the inner sleeve 2 of the hot pressing and sintering mold abuts against the end surface of the support plate 3. The upper pressing head 4 is used to extend from the end of the inner sleeve 2 away from the support plate 3 into the second through hole 21 for pressurization. Since the hot pressing and sintering pressurizing device of this embodiment adopts the hot pressing and sintering mold of Example 1, it also has the advantages of the hot pressing and sintering mold.

[0032] In this embodiment, the hot pressing sintering pressurizing device further includes a plurality of pads 6 which can be selectively loaded into the second through hole 21 of the inner sleeve 2. Different numbers of pads 6 can be selectively loaded into the second through hole 21 of the inner sleeve 2 to control the thickness of the product.

[0033] In this embodiment, at least two of the plurality of pads 6 have different thicknesses, which facilitates the selection of pads 6 of different thicknesses to control the thickness of the product.

[0034] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and changes obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hot pressing sintering mold, comprising an outer sleeve (1) having a first through hole (11) and an inner sleeve (2) having a second through hole (21), wherein the inner sleeve (2) is sleeved and installed in the first through hole (11), characterized in that: The diameter of the first through hole (11) gradually increases from one axial end to the other end, and the outer side surface (22) of the inner sleeve (2) is a conical surface that fits the inner wall of the first through hole (11).

2. The hot pressing sintering mold according to claim 1, characterized in that: The cone angle of the conical surface is 1° to 2°.

3. The hot pressing sintering mold according to claim 2, characterized in that: The cone angle of the conical surface is 1.4°.

4. The hot pressing sintering mold according to claim 1, characterized in that: The side wall of the inner sleeve (2) has a disconnection slit (23) arranged along the axial direction.

5. The hot pressing sintering mold according to claim 1, characterized in that: The axial ends of the outer sleeve (1) and the inner sleeve (2) are flush.

6. A hot pressing sintering pressure device, comprising a support plate (3), a mold, an upper pressure head (4) and a lower pressure head (5) connected to the support plate (3), characterized in that: The mold is a hot pressing and sintering mold as described in any one of claims 1 to 5, wherein one end of the outer sleeve (1) and the inner sleeve (2) of the hot pressing and sintering mold abut against the end surface of the support plate (3), and the upper pressure head (4) is used to extend from the end of the inner sleeve (2) away from the support plate (3) into the second through hole (21) for pressurization.

7. The hot pressing sintering pressurizing device according to claim 6, characterized in that: The hot pressing and sintering pressure device also includes a plurality of pads (6) which are selectively inserted into the second through holes (21) of the inner sleeve (2).

8. The hot pressing sintering pressurizing device according to claim 7, characterized in that: At least two of the plurality of pads (6) have different thicknesses.

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