Abstract
Special equipment for thermal removal of binder under controlled pressure conditions and with controlled gas flow rate was built to study the debinding process of injection moulded parts. The equipment was designed to record changes in the weight of injection mouldings, and an operating system made it possible to control their weight loss by temperature. The thermal debinding process of injection moulded parts prepared from fine alumina powder and a thermoplastic binder system based on ethylene-vinyl acetate copolymer and paraffin was studied using this equipment. The influence of pressure and flow rate of various gaseous atmospheres (air, oxygen, nitrogen, carbon dioxide and vacuum) was investigated. The benefit of binder removal in an inert atmosphere with controlled weight loss rate is described.
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