Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (8): 17-23.

• Mechanical Engineering • Previous Articles     Next Articles

Preparation and Property of a Water-Soluble Binder for Dynamic Injection Molding of Metal Powders

Liu Bin  Luo fie-wen  Du Li-gang  Qu Jin-ping   

  1. Key Laboratory of Polymer Processing Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-12-16 Revised:2009-03-09 Online:2009-08-25 Published:2009-08-25
  • Contact: 刘斌（1969-），男，博士，副教授，主要从事模具CAD／CAE／CAM和材料成型装备及数控技术的研究． E-mail:bliu@scut．edu．cn
  • About author:刘斌（1969-），男，博士，副教授，主要从事模具CAD／CAE／CAM和材料成型装备及数控技术的研究．
  • Supported by:

    国家自然科学基金资助项目（10590351）

PDF

1054

Abstract:

:A kind of water-soluble binder suitable for the dynamic injection molding of metal powders was prepared, with polyethylene glycol and polyoxymethylene as the main components. The binder was then characterized by means of SEM, DSC, TG, dynamic rheological test, thermal performance analysis, and degreasing rate test. The results indicate that （ 1 ） the components in the binding system are of good compatibility and the binder perfectly mixes with the metal powders; （2） the binder with good response to the vibration force field can reduce the extrusion pressure by 6. 07% at most; （3） the binder is degreased very fast in water with a high degreasing ratio, and the degreasing ratio is up to 43.06% after a 4-h dipping in water at 75℃ ; （4） the binding system is of good thermal decomposition performance; and （5） additives benefit the sintering because they help to reduce the decom- position temperature.

Key words: binder, water-solubility, metal powder, dynamic injection molding, degreasing