Sealed multi-material special engineering plastic additive manufacturing method and apparatus

A special engineering plastics, additive manufacturing technology, applied in manufacturing auxiliary devices, additive manufacturing, manufacturing tools, etc., can solve the problems of large deformation of printed parts, high price of supporting materials, low printing accuracy, etc., and achieve the ability to increase deformation , the use of flexible and convenient, easy to operate effect

Active Publication Date: 2017-04-05
JILIN UNIV
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Problems solved by technology

[0005] The invention provides a method and device for additive manufacturing of closed multi-material special engineering plastics to solve the current problems of large deformation of printed parts, high price of supporting materials and low printing accuracy

Method used

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  • Sealed multi-material special engineering plastic additive manufacturing method and apparatus
  • Sealed multi-material special engineering plastic additive manufacturing method and apparatus
  • Sealed multi-material special engineering plastic additive manufacturing method and apparatus

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Experimental program
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Embodiment Construction

[0041] Include the following steps:

[0042] 1) Before starting to print, select special engineering plastics with similar properties to special engineering plastics as the support material, and the shrinkage rate of the material selected for the support material is 0.4%-0.7% smaller than the shrinkage rate of the main material;

[0043] 2) Level the heated bed of the three-axis motion platform of the printer, then heat the heat preservation room to 140°C, keep the heat preservation room warm for 10 minutes, and then discharge the air in the heat preservation room;

[0044] 3) Obtain the 3D model of the part, divide the 3D part into several 2D layers, then slice and layer it into STL format files, select the appropriate filling rate for different special engineering plastics, and then set the printing thickness of each layer according to the different materials. 0.02mm-0.2mm, printing speed of 30mm / s-50mm / s, combination of programming source code of supporting structure and pr...

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Abstract

The invention relates to sealed multi-material special engineering plastic additive manufacturing method and apparatus and belongs to the technical field of additive manufacturing of special engineering plastic. A three-axis movement platform assembly is installed inside a thermal insulation chamber assembly. A special engineering plastic filament delivery roll assembly is installed in a back surface plate of the thermal insulation chamber assembly. A spray nozzle assembly is disposed on the top of interior of the thermal insulation chamber assembly. The method and the apparatus achieve low temperature difference and low deformation in 3D printing of special engineering plastic, so that parts in complex structures, which have high crystalline degree, high mechanical strength and low surface roughness, can be formed from a high-melt-point special engineering plastic. Defects of large deformation, poor mechanical strength of a moulded part, and low size precision in a conventional high-temperature special engineering material printing process are overcome, and a defect of warping deformation during a powder moulding process in a selective laser sintering 3D printing technology is avoid. The method and the apparatus solve the problems such as high surface roughness in artificial bone 3D printing in the medical field, and have excellent medical and industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing of special engineering materials, in particular to a method and device for additive manufacturing of multi-material special engineering plastics. Background technique [0002] Special engineering plastics have the characteristics of flame retardancy, good coating processability (melt extrusion without solvent), good peel resistance, good wear resistance, excellent biocompatibility and strong radiation resistance, etc. It is widely used in medical, aviation, aerospace, shipbuilding, atomic energy and other fields. Special engineering plastics have the characteristics of high melting point, high temperature resistance, corrosion resistance, and high strength. The cost of 3D printers for laser sintering special engineering plastics is very high. The existing desktop-level FDM 3D printers have problems such as low precision and small print size. Traditional FDM printers mostly use the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/295B29C64/209B29C64/40B29C64/307B29C64/20B33Y10/00B33Y30/00B33Y40/00B33Y50/02
CPCB33Y10/00B33Y30/00B33Y40/00B33Y50/02
Inventor 吴文征叶稳立耿鹏王玉磊武子超李桂伟赵继
Owner JILIN UNIV
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