PROCESS AND APPARATUS FOR MAKING TUFTED ARTICLE

摘要

A process for making a tufted article from a thermoplastic material comprises controlling injection pressure according to a pressure-dominated algorithm including detecting at least 100 melt-pressure measurements per second upstream a front end of a mold cavity. An apparatus comprises a pressure-control mechanism for monitoring and adjusting an injection pressure according to the pressure-dominated algorithm, wherein the pressure-control mechanism comprises at least one high-frequency pressure sensor located upstream the mold cavity's front end.