| 摘要 |
PURPOSE:To simplify manufacturing process, to disuse adhesive agent, to improve the appearance of skin by blowing and sticking the skin of porous material integrally to the outer surface of a base material made of thermoplastic synthetic resin. CONSTITUTION:The parison 9 in a pipe from providing the base member 1 is extruded from a die 8 between a pair of molds 6, 7. Skin 2 in a sheet form is arranged between the parison 9 and one mold 6 with a small allowance so as to conform to the increase of the surface area at blowing time. Then, an air ejector nozzle 10 is inserted into the lowermost end of the parison 9 and compressed air is blown between both molds 6, 7 which are engaged with each other. Therefore, the parison 9 is expanded in the cavity between both molds 6, 7, the molten resin of the parison 9 is permeated by air pressure between the threads 4 of the skin 2 and a portion of the resin is welded to the thread 4 and the skin 2 is stuck integrally to the external surface of the parison 9. Then, the skin 2 is cooled, both molds 6, 7 are removed and the sticking edge of the formed piece is finished. |
