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Anti-deformation co-combustion sintering fixture and material thereof

A technology for jigs and sintered workpieces, which is applied in the field of jigs, and achieves the effects of large shrinkage, reduced sliding friction for demoulding, and reduced manufacturing costs

Inactive Publication Date: 2018-10-23
东莞市依诺电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional processing technology, although the powder injection molding process has obvious economic and technical advantages, the technical problems faced by this technology are also very prominent

Method used

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  • Anti-deformation co-combustion sintering fixture and material thereof
  • Anti-deformation co-combustion sintering fixture and material thereof
  • Anti-deformation co-combustion sintering fixture and material thereof

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1: The anti-deformation sintering jig provided in this embodiment includes a substrate 1, the substrate includes a base 11 and an assembly structure 12 that is in contact with the surface of the workpiece 4 to be sintered, wherein the workpiece to be sintered can be a titanium alloy watch case , the preferred cross-section of the base 11 is a rectangle, and the assembly structure 12 is a plurality of bumps 2 or a plurality of grooves 3. When the plurality of bumps are hemispherical bumps, the adjacent bumps are arranged at equal intervals. When a plurality of grooves are all trapezoidal grooves, adjacent grooves are arranged at equal intervals. Among them, the convex point or groove structure can play the role of exhaust support and reduce friction. The material shrinkage rate of the anti-deformation sintering fixture is the same or similar to that of the surface of the workpiece to be sintered, and the sintering temperature of the material of the anti-deform...

Embodiment 2

[0030]Embodiment 2: It is basically the same as Embodiment 1, the difference is that the material of a kind of anti-deformation sintering fixture with firing in this embodiment is made of components including the following weight percentages: 50% powder, water-soluble 14.5% of polyester, 20% of polypropylene, 10% of fatty acid amide phosphate, 5% of coupling agent polypropylene grafted acrylic acid, 0.3% of stabilizer calcium laurosilicate, and 0.2% of antioxidant BHT. The powder includes the following components in parts by weight: 20 parts of silicon powder, 6 parts of stainless steel powder, and 38 parts of alumina ceramic powder.

Embodiment 3

[0031] Embodiment 3: It is basically the same as Embodiment 1, the difference is that the material of a kind of anti-deformation sintering fixture with firing in this embodiment is made of components including the following weight percentages: powder 60%, water-soluble 10% polyester, 16.3% polypropylene, 10% fatty acid amide phosphate, 3% isopropyl dihexadecyl borate as a coupling agent, 0.3% sodium stearate as a stabilizer, and 1680.4% antioxidant. The powder includes the following components in parts by weight: 12 parts of silicon powder, 8 parts of stainless steel powder, and 35 parts of alumina ceramic powder.

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Abstract

The invention discloses an anti-deformation co-combustion sintering fixture. The anti-deformation co-combustion sintering fixture comprises a base body. The base body comprises a base and assembling structures making contract with the surface of a to-be-sintered workpiece. The material shrinkage rate of the anti-deformation co-combustion sintering fixture is identical with or close to that of thesurface of the to-be-sintered workpiece. The material sintering temperature of the anti-deformation co-combustion sintering fixture is higher than that of the surface of the to-be-sintered workpiece.The assembling structures are a plurality of protrusions or grooves. The invention further discloses a material of the anti-deformation co-combustion sintering fixture. The material is prepared from,by weight, 50%-60% of powder, 10%-20% of water-soluble polyester, 10%-20% of polypropylene, 8%-10% of fatty acid amide phosphate, 3%-5% of a coupling agent, 0.3%-0.5% of a stabilizer and 0.2%-0.5% ofan antioxidizer. According to the anti-deformation co-combustion sintering fixture and the material thereof, sintering deformation of an injection-formed surface shell of titanium alloy powder can beprevented, the product defective rate caused by sintering deformation is greatly decreased, the productivity is improved, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of jigs, in particular to a sintering anti-deformation sintering jig for preventing sintering deformation at a sintering section of a watch case sintered by titanium alloy powder injection molding and a material thereof. Background technique [0002] In the existing field of titanium alloy powder injection molding, in order to ensure the reliability of the shape retention of the titanium alloy case, buried sand, profiling sintering fixtures are often used, or support columns for the case molding body are added to reduce the sintering of the body process deformation. But limited to the characteristics of the existing titanium alloy powder on the market, none of the above methods can well solve the problem of sintering deformation of the titanium alloy watch case. Powder injection molding is a new near-net molding technology, which is used to produce products with smaller size and complex shape. Compared wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10B22F3/22B22F1/00
CPCB22F3/10B22F3/225B22F2003/1042B22F1/10
Inventor 余建军周刚
Owner 东莞市依诺电子科技有限公司
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