Patent ID: 8403251
Filing Date: 2013-03-26
Classification: B29C

Abstract:
1. A tension control system for fiber bundles in a filament winding apparatus that applies a winding tension to a fiber bundle unwound from a fiber bundle feeding package and winds the tension-applied fiber bundle around a mandrel, the filament winding apparatus comprising: a tension sensor that detects a tension of the unwound fiber bundle between the fiber bundle feeding package and a tension applying portion before the winding tension is applied; determination means that determines a tension abnormality of the fiber bundle by comparing pre-set reference information with a tension measured value measured by the tension sensor, wherein the determination means predicts when a fiber bundle breakage is to occur; control means that stops a process of winding the fiber bundle around the mandrel when the determination means determines the tension abnormality, wherein the control means stops the filament winding device before the occurrence of the fiber bundle breakage; and a tension measuring unit that measures a tension of the fiber bundle after the winding tension has been applied and transmits the measured tension to the control means, wherein the control means controls the tension applying portion in accordance with the measured tension received from the tension measuring unit so that the winding tension applied to the fiber bundle is controlled to be a prescribed winding tension.