Patent ID: 8419997
Filing Date: 2013-04-16
Classification: B29B,B29C,B29K,Y02W

Abstract:
1. A method for injection molding of plastic material, with the plastic material initially present in the form of lumpy or particle-shaped polymer particles or flakes, comprising: pretreating the plastic material by heating and softening the plastic material in at least one continuously-driven cutter-compactor while mixing the plastic material at a temperature below a melting temperature of the plastic material, with at least one comminution or mixing tool, the tool comprising working edges that act so as to comminute and/or mix the plastic material, wherein the cutter-compactor further comprises a removal opening; subsequently, while the plastic material is still lumpy, transferring the plastic material directly and immediately into a worm-gear injection molding device attached directly and immediately to the cutter-compactor, the injection molding device comprising a worm gear, rotatable in a housing and able to be shifted axially therein and acting as a piston; plastifying the plastic material within the injection molding device; and spraying the plastic material into a shaped piece; wherein the transferring the plastic material comprises compressing the plastic material by force-feeding through motion of the tool, and bringing the tool into abutment with the removal opening to directly force feed the plastic material through the removal opening and into a catchment area of the worm-gear injection molding device, wherein the catchment area is immediately adjacent the removal opening.