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Screw-type extrusion system and 3D printer comprising same

A screw type and screw technology, applied in 3D object support structure, coating device, additive manufacturing, etc., can solve the problems that the material cannot be heated to a high temperature, cannot be formed, etc., to achieve optimized temperature distribution and better performance , the effect of flexible heating methods

Pending Publication Date: 2018-07-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such extrusion systems, the material entering the barrel cannot be heated to very high temperatures because otherwise the material reaching the nozzle would be too thin to form

Method used

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  • Screw-type extrusion system and 3D printer comprising same
  • Screw-type extrusion system and 3D printer comprising same
  • Screw-type extrusion system and 3D printer comprising same

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Embodiment Construction

[0026] Figure 1 to Figure 3 A screw extrusion system 100 according to one embodiment of the present application is schematically shown. In this embodiment, the screw extrusion system 100 is used to be installed on a three-dimensional printer using Fused Deposition Modeling (FDM) technology to realize three-dimensional printing of hot-melt materials (especially thermoplastic polymer materials). It should be understood, however, that the extrusion system can also be used on 3D printers using other technologies such as low temperature deposition.

[0027] The extrusion system 100 includes a barrel 8, a nozzle 9 detachably installed at the lower end of the barrel 8, a screw 7 rotatably installed in the barrel 8, and three heating devices 11 arranged around the outer wall of the barrel 8, 12, 13. The extrusion system 100 also includes a cooling device 10 arranged around the outer wall of the barrel 8 and adjacent to the spray head 9 . Due to the existence of the cooling device,...

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Abstract

The invention provides a screw-type extrusion system and a 3D printer comprising the same. The screw-type extrusion system comprises a machine barrel, a spray head detachably mounted at the lower endof the machine barrel, a threaded rod rotatably mounted in the machine barrel, one or more heating devices arranged around the outer wall of the machine barrel, and a cooling device arranged around the outer wall of the machine barrel and adjacent to the spray head. By adopting the extrusion system, materials entering the machine barrel can be heated quite flexibly, and especially, the materials can be heated to the quite high temperature in the middle of the machine barrel, so that molecular chains of the materials are fully opened, then the materials are rapidly cooled to the predetermined temperature in the position adjacent to the spray head, and accordingly the materials have viscosity suitable for extrusion forming.

Description

technical field [0001] The invention relates to the field of additive manufacturing (3D printing) material processing, more specifically, to a screw extrusion system and a 3D printer including the system. Background technique [0002] In recent years, additive manufacturing, especially 3D printing technology, has made great progress. A commonly used technology for 3D printing is Fused Deposition Modeling (FDM) technology, which is especially suitable for polymer materials (such as ABS, polylactic acid PLA, polycaprolactone PCL, etc.). In the 3D printing equipment using this technology, the material extrusion system plays an important role, which directly affects the quality and performance of the product. [0003] The screw extrusion system is the most commonly used one at present, and usually includes a mechanical part and a temperature control part. The mechanical part generally includes a barrel, a nozzle fixed at the lower end of the barrel, a screw set in the barrel, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/205B33Y30/00
CPCB33Y30/00
Inventor 孙伟张磊康双珠王程锦
Owner TSINGHUA UNIV
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