| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin-made tank by which an inexpensive and liner-less tank can be efficiently manufactured while dispensing with a mold-release process and repairing/mending work by using a resin-made mandrel to manufacture a cylindrical tank. SOLUTION: The manufacturing process of the invention is roughly composed of a molding stage (1) of a resin-made mandrel, a molding stage (2) of a cylindrical tank and a demolding stage (3) of the mandrel, and comprising the following steps of molding the mandrel comprising a thermoplastic resin by blow molding with arranging in a molding mold a cylindrical body comprising a thermoplastic resin material, demolding the mandrel, forming an inner layer of the resin material and a nonwoven fabric on the outer circumferential surface of the mandrel, forming a fiber-reinforced plastic layer by winding at least one layer of a fiber-reinforced plastic layer around the outer circumferential surface and heating under pressure, forming a reinforcing layer and an outermost layer on the outer circumferential surface of the fiber-reinforced plastic layer, heating and pressurizing to finalize the tank body and demolding the mandrel from the inside of the tank body by sucking under negative pressure. COPYRIGHT: (C)2008,JPO&INPIT |
