Draft

This is a design aspect where MIM often differs from other injecting molding requirements. Some MIM components can be designed with little or no require draft.

There are some factors that contribute to this ability:         

• First, the MIM feedstock is loaded with metal powders which retain heat long after the molding cycle has been completed

• Post molding shrinkage which occurs with plastic parts while they are still in the mold, occurs for MIM parts during the first several minutes after they have been removed from the mold

• This allows the part to be ejected before it can cool and shrink around cores and/or other mold cavity features

• Secondly, the polymer binder used in MIM feedstock acts as a lubricant to assist in the ejection of the part from the mold cavity