Patent ID: 6558603
Filing Date: 2003-05-06
Classification: B29C

Abstract:
A method of producing thermoplastic injection-molded parts reinforced with long fibers, comprising the steps of:continuously feeding a stream of melt of thermoplastic material reinforced with long fibers to a feed space of at least two piston and cylinder units, each having a piston; and controlling a pressure upon the piston and cylinder units such that melt is able to flow from the feed space to an injection space in a cylinder of one piston and cylinder unit as a consequence of a differential pressure prevalent on opposite piston surfaces of the piston of the piston and cylinder unit to thereby fill the injection space, whereas melt in the injection space of the other piston and cylinder unit is forced into a cavity of an injection mold while prevented from returning to the feed space and while the feed space receives melt.