Patent ID: 8465612
Filing Date: 2013-06-18
Classification: A63B,B29C,B29K,B29L

Abstract:
1. A manufacturing method of a tubular body having a rib provided therein, comprising the steps of: preparing a mandrel divided into two or more divided bodies along a longitudinal direction of the mandrel; winding a prepreg for a rib around at least one of the divided bodies such that a first end portion of the prepreg and a last end portion of the prepreg overlap; combining all the divided bodies to obtain a first intermediate body after the step of winding the prepreg for the rib; winding a prepreg for an outer peripheral part around an outside of the first intermediate body to obtain a second intermediate body; heating the second intermediate body to obtain a cured laminate; and extracting the mandrel from the cured laminate.