Patent ID: 7351366
Filing Date: 2008-04-01
Classification: B29C,B29K

Abstract:
1. A method of manufacturing a low pressure injection type RIM mold, comprising: machining a material that is suitable for NC machining, so that a skin material with a base for a product can be prepared using skin data on the product; preparing an outer frame around the machined skin material and pouring epoxy directly onto the machined skin material to prepare a lower mold; releasing and inverting the lower mold after the epoxy has been completely cured, and performing NC machining on the released portion of the lower mold; preparing a thickness-defining portion on the inverted lower mold using one of wax and resin by machining for the thickness of the product, bosses and a rim; preparing an upper mold by pouring epoxy onto the machined surface wherein a thickness-forming portion is formed; and removing the thickness-forming portion to thereby form a RIM mold, wherein the skin material prepared in the machining is made of polystyrene.