CONTINUOUS MANUFACTURE OF RUBBER HOSE

摘要

PURPOSE:To obtain a high-quality rubber hose by a method wherein an unvulcanized rubber hose with a rigid synthetic resin reinforcing core being buried is heated from inside in such a way as to eliminate the enlargement of a molding machine by greatly raisting the efficiency of heating and by shortening the zone of vulcanization. CONSTITUTION:An unvulcanized rubber belt 6 in which a rigid synthetic resin 5 is buried is spirally wound around the center of the area between the molding roller group 2 and the pushing roller 3 of a hose molding machine 1 having a spiral feeding machanism, and the side edges of the rubber belt are bonded with each other to form a hose-shaped material. The hose-shaped material is advanced to the tip of the molding roller group 2 while being turned and then hung down from a cantilever type rotary roll 10. Under the condition, hot air is jetted from the nozzle 9 of the pipe 8 heat the inner side of the hose and the outside of the hose is heated by an infrared heater 11 to obtain continuously an objective vulcanized rubber hose.