| 摘要 |
PURPOSE:To simplify a manufacturing process of a high-pressure hose of a bent form by making a mandrel unnecessary, by a method wherein after lamination of an inner pipe layer and reinforcing layer made of thermoplastic resin and an external pipe layer made of a high-molecular weight elastic material in a straight tubular state and the laminated matter in the straight tubular state is bent by molding through a mold. CONSTITUTION:An inner pipe layer 2 is formed of thermoplastic resin into a straight tubular state, and a reinforcing layer 3 is formed on its external circumferential surface after it has been cooled until it possesses shape retention capacity. A polyvinyl or polyester synthetic fiber or reclaimed fiber is used as reinforcing yarn, and the reinforc ing layer 3 is of one layer structure. An external pipe layer 4 is formed so as to coat the reinforcing layer 3 with a high-molecular weight elastic material and, the covering is effected through extrusion. A hose of a semifinished product composed of the inner pipe layer 2, reinforcing layer 3 and outer pipe layer 4 by laminating them in the straight tubular state is cut into predetermined lengths, set up into a cavity 29 of a bending mold 27 and heated by fixing by hose presses 31, 32. When the same is cooled, a high-pressure hose bent after the cavity 29 of the bending mold 27 is obtained.
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