Throwback Thursday: Selection Process for Stainless Mold Steels

Successful production of plastic components associated with the extrusion, injection and compression molding greatly depends on the mold material selection.


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Mold material selection is more than just a matter of choosing the cheapest or easiest material available at a given time. It’s a process, as critical to the success of a mold as the design and machining protocols used to build it. Today’s TBT provides a tutorial on factors that should be taken into consideration when choosing mold materials, and there are several, including:

  • final plastic part requirements
  • cosmetic requirements
  • resin type, 
  • filler content
  • expected tool life
  • production environment
  • expected cycle time
  • heat treatment
  • weldability and machinability.

This Throwback is from 2011, and mold materials have multiplied since then to offer an array of choices and benefits, but it’s never a bad idea to review these important steps from supplier Schmolz+Bickenbach USA, Inc..