Debinding in Powder injection molding

MIM powder injection molding(link: http://www.zcmim.com/bymaterial.shtml) of stainless steel part mainly use wax-based thermoplastic binder. Stainless steel debinding technology is divided into heat debinding, solvent debinding, skim debinding and catalysis debinding, among which the most widely used is solvent bebinding. Solvent bebinding removes most binder through dissolution and other methods, only leaving connected channel. These connected channels can make low relative molecular gas quickly spread to the outside of blank that produced in the process of subsequent heat debinding, so that the subsequent heat debinding process can be carried out quickly. The purpose of debinding is to remove the binder rapidly without defects such as porosity.

Product will become very fragile after removing binders. But we must ensure the spare parts’ shape. Current technology is usually combine debinding and sintering process. The binder can be completely removed before heating temperature reached sintered standard.

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