Post-processing technology for SLS workpiece surface

A technology for parts and processes, applied in the field of surface post-treatment of SLS parts, can solve the problems of surface roughness, smoothness and coloring that do not meet the requirements for use, and achieve the effect of improving the optimization rate
CN103521773AActive Publication Date: 2014-01-22SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD
Publication Date
2014-01-22

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Abstract

The invention discloses a post-processing technology for an SLS workpiece surface. The post-processing technology comprises S1, surface abrasive blasting, wherein spraying materials of the size of 75-115 microns are adopted to carry out abrasive blasting processing on the surface of a workpiece; S2, polishing, wherein abrasive paper is used for polishing the surface of the workpiece; S3, resin blending agent spraying, wherein epoxy resin, EP curing agents and anhydrous alcohol are blended according to a ratio of 1:1:1-2, spraying is carried out on the surface of the workpiece, and the thickness of a sprayed resin layer is 50-70 microns; S4, polishing, wherein after the workpiece is dried, the surface of the workpiece is polished through the abrasive paper, and the resin layer is polished to be 35-50 microns thick; S5, polyester paint mixed liquor spraying, wherein after polyester main color paint, curing agents and diluents are blended according to a ratio of 1:0.5-1:1-1.5, spraying is carried out on the workpiece to form a finishing coat layer with a thickness of 40-60 microns. The post-processing technology is adopted to process the nylon SLS workpiece, the surface roughness, surface finish degree and coloring condition of the workpiece can be greatly improved, the strength of the surface of the workpiece is strengthened, and the workpiece is made to meet actual using needs.
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Description

technical field

[0001] The invention relates to the field of surface treatment, in particular to a surface post-treatment process of an SLS part. Background technique

[0002] The selective laser sintering rapid prototyping system - SLS (Selected Laser Sintering), first converts the CAD three-dimensional model into an STL file, slices it according to a certain thickness, and obtains the interface outline of the slice. Then control the laser beam to scan the powder in the solid part of the model, so that the powder particles are melted and bonded to each other, and the outline of the layer is gradually obtained. After the scanning of one layer is completed, the worktable is lowered to the cross-sectional height of one layer, and then the next layer is powdered and sintered, and finally a three-dimensional model is formed.

[0003] After the SLS part is formed, there are many pores on the surface, and the surface roughness is about Ra12.5. The roughness, smoothness and colori...

Claims

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