Patent ID: 8926313
Filing Date: 2015-01-06
Classification: B29C,B29K,B29L

Abstract:
1. A jig used for manufacturing a composite material structure, the jig being inserted into a channel portion of a hat stringer and used, when the composite material structure is manufactured by attaching prepreg to a frame structure including the hat stringer as a frame member, the channel portion extending in a lengthwise direction of the hat stringer; the jig comprising: a body, wherein the body comprises a pipe shape and is made of an elastic material, wherein the body has an entirely hollow interior and a trapezoidal shape in which a transverse cross-section perpendicular to a lengthwise direction of the body has an upper base and a lower base longer than the upper base, wherein the interior of the body is tightly sealed, and the body has on one end portion thereof, a pressurization hole for pressurizing the interior of the body to inflate the body, wherein the body comprises thickened edge portions with curved inner surfaces in which base bangle portions are greater in thickness than four corner wall portions in the transverse cross-section of the trapezoidal shape, and wherein the thickened edge portions are formed only at both base angle portions of an exposed wall portion; wherein the width of the thickened edge portion is in range of 30% to 40% of the entire width of the lower base.