Patent ID: 9211660
Filing Date: 2015-12-15
Classification: B29C,B29L

Abstract:
1. A molding apparatus comprising a preformed first mold having a molding face to one side thereof and a rear support face; a preformed second mold having a molding face to one side thereof and a rear support face; an adjustable support comprising aggregate material retained in a retaining vessel, a flexible sheet material covering said aggregate material, an arrangement for fluidizing said aggregate material and an arrangement for stressing said aggregate material; said adjustable support in a stressed state of said aggregate material having said flexible sheet material and stressed aggregate material shaped to generally uniformly support said rear support face of said first preformed mold for an injection molding operation; said adjustable support when said arrangement for fluidizing said aggregate material is activated being reconfigurable as the aggregate material is displaceable such that the shape of the adjustable support can be altered to follow the shape of the rear support face of said first preformed mold; a support for said preformed second mold supporting said second preformed mold with said molding face thereof is opposite said molding face of said preformed first mold and movable to bring said preformed molds into abutment defining an injection molding cavity between said molding faces; sealing means about said injection molding cavity; and an arrangement for injecting plastic under pressure into said molding cavity; and wherein said arrangement for stressing said aggregate material causes jamming of said aggregate material and support of said rear support face of said first preformed mold and said arrangement for fluidizing said aggregate material allows for reconfiguration of said aggregate material.