Universal sintering jig for MIM parts

Abstract

The utility model provides a general sintering jig for MIM parts, which comprises a bottom plate, a barrier strip assembly and a cover plate, one surface of the bottom plate is provided with a barrier strip groove, the barrier strip assembly comprises two first barrier strips and two second barrier strips, the first barrier strips and the second barrier strips are arranged in the barrier strip groove in a staggered manner, one second barrier strip is clamped with one ends of the two first barrier strips, and the other ends of the two first barrier strips are clamped with the cover plate. The other second blocking strip is connected with the other ends of the two first blocking strips in a clamped mode, and the two first blocking strips and the two second blocking strips are covered with the cover plate. A closed space is defined by the bottom plate, the blocking strip assembly and the cover plate. The products to be sintered are sintered through the universal sintering jig for the MIM parts, compared with an original scheme that a crucible is matched with a ceramic plate, the products to be sintered do not need to correspond to the crucible one by one, the multiple products to be sintered are laid on the bottom plate, the utilization rate of the closed space in the jig is high, the sintering loading work can be completed only by assembling six parts, and the production efficiency is improved. Compared with an existing sintering jig scheme, the cost advantage is obvious, the whole furnace loading capacity of products is increased, and the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering fixtures, and specifically, to a universal sintering fixture for MIM parts. Background Art

[0002] MIM is the abbreviation of Metal Injection Molding. It mixes metal powder with binder for granulation, injects the granulated raw material into a mold to form a MIM green body, and finally realizes the production of parts through debinding and sintering. The MIM process is divided into: 1. Kneading and granulation, 2. Injection molding, 3. Placing parts, 4. Debinding, 5. Sintering. Through the above five steps, the production of parts is achieved.

[0003] For the sintering in the production of titanium alloy MIM parts, the sintering fixture generally includes a zirconia ceramic plate and a zirconia crucible. During use, the staff places the product to be sintered on the zirconia ceramic plate, covers the zirconia crucible on the product to be sintered, so that the zirconia crucible cover and the zirconia ceramic plate enclose a closed space, and the product to be sintered is located in this closed space to ensure that the product to be sintered is in a closed environment during sintering, avoiding the problem of surface oxidation during sintering.

[0004] In the prior art, when sintering MIM parts by using the cooperation of a zirconia ceramic plate and a zirconia crucible, the crucible is prone to deformation and chipping after entering the sintering furnace. After deformation, it will cause air leakage, resulting in surface oxidation of the product. Multiple products to be sintered require multiple zirconia crucibles to ensure that the products to be sintered are located in a closed environment during sintering. The sintering fixture has a high cost and a low loading capacity of the sintering furnace. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, this application provides a universal sintering fixture for MIM parts.

[0006] A universal sintering fixture for MIM parts disclosed in this application includes: a bottom plate, a strip component and a cover plate. A strip groove is provided on one side of the bottom plate. The strip component includes two first strips and two second strips. The first strips and the second strips are staggered and arranged in the strip groove. One second strip is clamped with one ends of the two first strips, and the other second strip is clamped with the other ends of the two first strips. The cover plate is covered on the two first strips and the two second strips; a closed space is enclosed among the bottom plate, the strip component and the cover plate.

[0007] Preferably, the bottom plate is rectangular, there are four strip grooves, the strip grooves are arranged along the edge of the bottom plate, and each strip groove extends from one end of the bottom plate to the other end of the bottom plate. The two first strips are respectively located in two opposite strip grooves, and the two second strips are respectively located in the other two strip grooves.

[0008] Preferably, on one side of the first bar that faces away from the bottom plate, there are two first clamping grooves, which are respectively located at both ends of the first bar. On one side of the second bar that faces the bottom plate, there are two second clamping grooves, which are respectively located at both ends of the second bar. One end of the first bar is buckled with the second clamping groove of one of the second bars through the first clamping groove, and the other end of the first bar is buckled with the second clamping groove of the other second bar through the first clamping groove.

[0009] Preferably, the bottom plate is made of zirconia ceramics.

[0010] Preferably, the first bar and the second bar are made of alumina ceramics.

[0011] Preferably, the cover plate is made of alumina ceramics.

[0012] Preferably, the first bar and the second bar have the same height.

[0013] Preferably, the cover plate is rectangular.

[0014] The beneficial effects of this application are as follows: By using the MIM part universal sintering fixture to sinter the products to be sintered, compared with the original scheme of crucible combined with ceramic plate, the products to be sintered do not need to correspond to the crucibles one by one. Instead, multiple products to be sintered are laid on the bottom plate, and the utilization rate of the closed space inside the fixture is high. And the MIM part universal sintering fixture has only 6 components when disassembled, and the loading work for sintering can be completed only by assembling these 6 components. Compared with the existing sintering fixture scheme, it has obvious cost advantages, the loading capacity of the whole furnace of products increases, and the product cost is reduced. Description of the Drawings

[0015] The drawings described herein are used to provide a further understanding of this application and constitute a part of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0016] Figure 1 is the three-dimensional view of the MIM part universal sintering fixture in the embodiment;

[0017] Figure 2 is the exploded view of the MIM part universal sintering fixture in the embodiment;

[0018] Figure 3 is the exploded view of the MIM part universal sintering fixture with the cover plate hidden in the embodiment.

[0019] Reference Signs:

[0020] 1 - bottom plate; 2 - bar assembly; 3 - cover plate; 4 - closed space;

[0021] 11 - bar groove;

[0022] 21 - First gear bar; 22 - Second gear bar;

[0023] 211 - First clamping groove; 221 - Second clamping groove. Detailed implementation mode

[0024] The following will disclose multiple implementation modes of this application in diagrams. For the sake of clear illustration, many practical details will be explained together in the following description. However, it should be understood that these practical details are not used to limit this application. That is to say, in some implementation modes of this application, these practical details are not necessary. In addition, for the sake of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0025] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture as shown in the attached drawings. If this specific posture changes, then this directional indication will also change accordingly.

[0026] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes, not specifically referring to the order or sequence, nor used to limit this application. It is only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0027] To further understand the content, features and effects of this application, the following embodiments are cited and detailed as follows in conjunction with the attached drawings.

[0028] Please refer to Figure 1 , Figure 1 is a three - dimensional view of a general sintering fixture for MIM parts. In this example, the general sintering fixture for MIM parts includes a bottom plate 1, a gear bar assembly 2 and a cover plate 3. The gear bar assembly 2 encloses one surface of the bottom plate 1, the cover plate 3 is covered on the gear bar assembly 2, and a closed space 4 is formed by enclosing between the bottom plate 1, the gear bar assembly 2 and the cover plate 3. The closed space 4 is used to carry products to be sintered.

[0029] Please refer to Figure 2 , Figure 2It is an exploded view of a general sintering fixture for MIM parts. Specifically, on one side of the bottom plate 1, there is a strip groove 11. The strip assembly 2 includes two first strips 21 and two second strips 22. The first strips 21 and the second strips 22 are staggered and arranged in the strip groove 11. One second strip 22 is clamped to one end of the two first strips 21, and the other second strip 22 is clamped to the other end of the two first strips 21. The cover plate 3 is covered on the two first strips 21 and the two second strips 22. That is, each first strip 21 is adjacent to the two second strips 22, and each second strip 22 is adjacent to the two first strips 21. That is to say, the head and tail of the first strip 21 are respectively connected to the two second strips 22, and the head and tail of the second strip 22 are respectively connected to the two first strips 21. Among them, both the first strip 21 and the second strip 22 are detachably connected to the strip groove 11, and the cover plate 3 is also detachably connected to the first strip 21 and the second strip 22. In this example, the two first strips 21 are parallel to each other, the two second strips 22 are parallel to each other, and the first strip 21 is perpendicular to the second strip 22. The size of the general sintering fixture for MIM parts can be adaptively adjusted according to the size of different products.

[0030] In specific applications, the staff lay multiple products to be sintered on the side of the bottom plate 1 provided with the strip groove 11, install the two first strips 21 and the two second strips 22 onto the strip groove 11 of the bottom plate 1 respectively, and then cover the cover plate 3 on the two first strips 21 and the two second strips 22 located in the strip groove 11, so that a closed space 4 is formed by enclosing between the bottom plate 1, the strip assembly 2 and the cover plate 3, and the products to be sintered are located in the closed space 4; it is also possible to first install the two first strips 21 and the two second strips 22 onto the strip groove 11 of the bottom plate 1 respectively, then lay the products to be sintered on the side of the bottom plate 1 provided with the strip groove 11, and finally place the general sintering fixture for MIM parts loaded with the products to be sintered into the sintering furnace loading to complete the sintering of the products to be sintered.

[0031] In this way, by using the general sintering fixture for MIM parts to sinter the products to be sintered, compared with the original scheme of using crucibles and ceramic plates, the products to be sintered do not need to correspond to the crucibles one by one. Instead, multiple products to be sintered are laid on the bottom plate 1. The utilization rate of the closed space 4 inside the fixture is high. And the general sintering fixture for MIM parts has only 6 parts when disassembled, and the loading work for sintering can be completed only by assembling these 6 parts. Compared with the existing sintering fixture scheme, it has obvious cost advantages, the whole furnace loading capacity of the products increases, and the product cost is reduced.

[0032] Furthermore, the bottom plate 1 is rectangular, there are four strip grooves 11, the strip grooves 11 are arranged along the edge of the bottom plate 1, and each strip groove 11 extends from one end of the bottom plate 1 to the other end of the bottom plate 1. The two first strips 21 are respectively located in two opposite strip grooves 11, and the two second strips 22 are respectively located in the other two strip grooves 11.

[0033] Specifically, the four strip grooves 11 are respectively parallel to the four sides of the bottom plate 1, and each strip groove 11 extends from one end of the bottom plate 1 to the other end of the bottom plate 1, that is, the adjacent strip grooves 11 intersect and penetrate through. Both the two first strips 21 and the two second strips 22 can be installed in the strip grooves 11. After the two first strips 21 and the two second strips 22 are installed in the strip grooves 11, the two first strips 21 and the two second strips 22 are respectively clamped with the strip grooves 11, and both the two first strips 21 and the two second strips 22 are detachably connected to the strip grooves 11.

[0034] In this way, the first strip 21 and the second strip 22 can be directly inserted into the strip groove 11, and the installation of the first strip 21 in the strip groove 11 does not affect the installation of the second strip 22 in the strip groove 11.

[0035] Please refer to Figure 3 , Figure 3 which is the exploded view of the hidden cover plate of the general sintering fixture for MIM parts. Further, on the side of the first strip 21 facing away from the bottom plate 1, there are two first clamping grooves 211, which are respectively located at both ends of the first strip 21. On the side of the second strip 22 facing the bottom plate 1, there are two second clamping grooves 221, which are respectively located at both ends of the second strip 22. One end of the first strip 21 is buckled with the second clamping groove 221 of one of the second strips 22 through the first clamping groove 211, and the other end of the first strip 21 is buckled with the second clamping groove 221 of the other second strip 22 through the first clamping groove 211.

[0036] In this way, when installing the strip assembly 2 to the bottom plate 1, the two first strips 21 can be installed to the two strip grooves 11 first. After the two first strips 21 are respectively inserted into the strip grooves 11, the two first strips 21 are respectively installed to the two strip grooves 11. The second clamping grooves 221 of the second strips 22 can be directly buckled and clamped with the first clamping grooves 211 of the first strips 21, ensuring the stability of the strip assembly 2. The installation process is simple and convenient, and it is also convenient to disassemble.

[0037] Further, the bottom plate 1 is made of zirconia ceramics.

[0038] In this way, the bottom plate 1 has high hardness and high toughness and is not easily damaged.

[0039] Further, the first strip 21 and the second strip 22 are made of alumina ceramics, the cover plate 3 is made of alumina ceramics, the bottom plate 1 uses zirconia ceramics, and the rest of the components are all made of alumina ceramic materials. Only the alumina ceramics are vulnerable parts, and the replacement cost is low.

[0040] Further, the first strip 21 and the second strip 22 have the same height. In this way, after the cover plate 3 is covered on the strip assembly 2, the sealing performance of the sealed space is good, the sealed space 4 is not easily air-leaked, and the oxidation of the product surface can be avoided.

[0041] Furthermore, the cross-section of the cover plate 3 is rectangular, so that the shape of the cover plate 3 matches the shape of the bottom plate 1.

[0042] In summary, by using the MIM part universal sintering fixture to sinter the products to be sintered, compared with the original scheme of crucible combined with ceramic plate, the products to be sintered do not need to correspond to the crucibles one by one. Instead, multiple products to be sintered are laid on the bottom plate. The utilization rate of the closed space inside the fixture is high. And the MIM part universal sintering fixture only has 6 disassembled parts, and the loading work for sintering can be completed only by assembling these 6 parts. Compared with the existing sintering fixture scheme, it has obvious cost advantages, the whole furnace loading capacity of the products increases, and the product cost is reduced.

[0043] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A general sintering fixture for MIM parts, characterized in that Including: A bottom plate (1), a bar component (2) and a cover plate (3). One side of the bottom plate (1) is provided with a bar groove (11). The bar component (2) includes two first bars (21) and two second bars (22). The first bars (21) and the second bars (22) are arranged alternately in the bar groove (11). One of the second bars (22) is clamped with one ends of the two first bars (21), and the other second bar (22) is clamped with the other ends of the two first bars (21). The cover plate (3) is covered on the two first bars (21) and the two second bars (22). A closed space (4) is formed by enclosing between the bottom plate (1), the bar component (2) and the cover plate (3).

2. The MIM part universal sintering jig according to claim 1, characterized in that The bottom plate (1) is rectangular. There are four bar grooves (11). The bar grooves (11) are arranged along the edge of the bottom plate (1), and each bar groove (11) extends from one end of the bottom plate (1) to the other end of the bottom plate (1). The two first bars (21) are respectively located in two opposite bar grooves (11), and the two second bars (22) are respectively located in the other two bar grooves (11).

3. The MIM part general sintering fixture according to claim 1, characterized in that, Two first clamping grooves (211) are provided on the side of the first bar (21) facing away from the bottom plate (1). The two first clamping grooves (211) are respectively located at both ends of the first bar (21). Two second clamping grooves (221) are provided on the side of the second bar (22) facing the bottom plate (1). The two second clamping grooves (221) are respectively located at both ends of the second bar (22). One end of the first bar (21) is buckled with the second clamping groove (221) of one of the second bars (22) through the first clamping groove (211), and the other end of the first bar (21) is buckled with the second clamping groove (221) of the other second bar (22) through the first clamping groove (211).

4. The MIM part universal sintering fixture according to claim 3, wherein, The bottom plate (1) is made of zirconia ceramics.

5. The general sintering fixture for MIM parts according to claim 4, wherein, The first bars (21) and the second bars (22) are made of alumina ceramics.

6. The general sintering jig for MIM parts according to claim 1, wherein The cover plate (3) is made of alumina ceramics.

7. The general sintering fixture for MIM parts according to claim 1, characterized in that The first bars (21) and the second bars (22) have the same height.

8. The MIM part universal sintering fixture according to claim 2, characterized in that, The cover plate (3) is rectangular.

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