Effect of a binder system on the low-pressure powder injection moulding of water-soluble zircon feedstocks

2013 ◽  
Vol 33 (15-16) ◽  
pp. 3185-3194 ◽  
Author(s):  
J. Hidalgo ◽  
C. Abajo ◽  
A. Jiménez-Morales ◽  
J.M. Torralba
Keyword(s):  
Injection Moulding ◽  
Low Pressure ◽  
Water Soluble ◽  
Powder Injection ◽  
Binder System ◽  
Powder Injection Moulding

Micro Powder Injection Moulding Using Nanosized Powders

2014 ◽  
Vol 1024 ◽  
pp. 116-119
Author(s):  
Norhamidi Muhamad ◽  
Javad Rajabi ◽  
Abu Bakar Sulong ◽  
Abdolali Fayyaz ◽  
Muhammad Rafi Raza
Keyword(s):  
Injection Moulding ◽  
Physical And Mechanical Properties ◽  
High Volume ◽  
Full Density ◽  
Powder Injection ◽  
Binder System ◽  
Polymer Mixtures ◽  
Nanosized Powders ◽  
Nano Powder ◽  
Powder Injection Moulding

Micro powder injection moulding (μPIM) is one of the micro-moulding technology applied today in high-volume fabrication of metal and ceramic micro-components. The current study presents the micro powder injection moulding (µPIM) of 316L Stainless Steel nanopowder-polymer mixtures. 316L SS powders have been blended with a binder system which consists of Polyethylene Glycol (PEG), Polymethyl Methacrylate (PMMA) and Stearic Acid (SA). All the feedstock prepared shows homogeneity and pseudo-plastic behaviour which is suitable for μPIM process. The results showed that increase in nano powder content would improve the powder loading, injection and sintering temperature. Moreover, high physical and mechanical properties of the sintered specimen have been achieved under vacuum atmosphere. The above results indicate that application of nano powder has the potential to provide micro powder injection moulded parts with nearly full density, fine microstructure. The binder system is environment-friendly, has low viscosity-temperature and suitable to prepare feedstock for μPIM.

Effects of Water Temperatures on Water-Soluble Binder Removal in Ceramic Materials Fabricated by Powder Injection Moulding

2015 ◽  
Vol 659 ◽  
pp. 90-95
Author(s):  
Wantanee Buggakupta ◽  
Nutthita Chuankrerkkul ◽  
Juthathep Surawattana
Keyword(s):  
Injection Moulding ◽  
Removal Rate ◽  
Ceramic Powder ◽  
Polyvinyl Butyral ◽  
Ceramic Materials ◽  
Water Soluble ◽  
Powder Injection ◽  
Powder Materials ◽  
Binder Removal ◽  
Powder Injection Moulding

This work focuses on the debinding conditions of the ceramic materials fabricated by powder injection moulding. Ceramic powder materials, including alumina and alumina-based composites were prepared as feedstocks and mixed with water-soluble polyethylene glycol (PEG) and polyvinyl butyral (PVB). The PEG/PVB binder mixture, with PEG to PVB ratio of 85:15 by weight and powder loading of 44 vol%, were thoroughly mixed and injected into the mould at the temperature of 190 °C to obtain rod-like specimens. Prior to sintering, the as-injected specimen was then leached in water, the temperature of which was varying from 30 (ambient temperature), 45 to 60 °C, in order to get rid of PEG and leave the specimens in shape by PVB. The rate of PEG removal according to different water temperatures was investigated. The experimental results suggested that PEG could completely be eliminated by 45 and 60 °C water without any dimensional disintegration in 5 hours whereas those leached in 30 °C water showed only 70% PEG removal. Higher water temperatures led to fast PEG removal rate at the beginning and then gradually decreased with elapsed times.

Impact of rheological model on numerical simulation of low-pressure powder injection moulding

2020 ◽  
pp. 1-9
Author(s):  
Raphaël Côté ◽  
Mohamed Azzouni ◽  
Oussema Ghanmi ◽  
Sarthak Kapoor ◽  
Vincent Demers
Keyword(s):  
Numerical Simulation ◽  
Injection Moulding ◽  
Rheological Model ◽  
Low Pressure ◽  
Powder Injection ◽  
Powder Injection Moulding

Low Pressure Powder Injection Moulding of Stainless Steel Powders

2001 ◽  
Vol 189-191 ◽  
pp. 610-615 ◽  
Author(s):  
J.V. Zampieron ◽  
J.P. Soares ◽  
F. Mathias ◽  
J.L. Rossi ◽  
Francisco Ambrozio Filho
Keyword(s):  
Stainless Steel ◽  
Injection Moulding ◽  
Low Pressure ◽  
Powder Injection ◽  
Powder Injection Moulding
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