| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a composite bending hose of a combination of resin, rubber and a reinforced layer. SOLUTION: A manufacturing method comprises a first step of forming an unvulcanized composite hose in the straight state on a rubber or resin mandrel 10, a second step of coating the unvulcanized rubber layer with a resin having a softening point higher than temperature at the time of mold vulcanizing, a third step of preheating an inner face resin layer 11 in an are on which the layer demonstrate the elastic deformation, a fourth step of setting the preheated unvulactized composite hose in a mold heated to the vicinity of vulcanizing temperature preliminarily, a fifth step of mold vulcanizing under the given vulcanizing conditions, a sixth step of removing the inner face layer 11 on an area on which the layer demonstrates the elastic deformation, a seventh step of removing the resin coating and a mandrel 10 on an area on which the inner face resin layer 11 demonstrates elastic deformation and an eighth step of setting the layer in a mold of desired molding shape during the cooling down to room temperature. |
