| 摘要 |
PURPOSE: To obtain a composite racket not polluting environment and generating no waste material by introducing a multilayered tubular body consisting of a thermoplastic film layer and a fabric sheet into a mold hole, heating the same at the melting temp. of the film layer to introduce a pressurizing gas into the tubular body, and further introducing a pressurizing gas of high pressure after a predetermined time. CONSTITUTION: Carbon fiber fabric sheet layers 22, 24, 26 are preliminarily bonded to respective film layers in a fiber arranging direction by using a large number of long fiber bundles. The tubular body 40 thus formed is introduced into the mold hole 44 of a mold jig 42 and the mold jig 42 is heated to film melting temp. and, at the same time, a pressurizing gas with a pressure of 1-3 kg/m<2> is introduced into the tubular body 40. After 5 min, a pressurizing gas with a pressure of 5-10 kg/cm<2> is further introduced into the tubular body 40 and the molten film is allowed to perfectly penetrate into the gaps between the long fiber bundles. After 10 min, a pressurizing gas with a pressure of 10-15 kg/cm<2> is further introduced and the fabric sheet layers 22, 24, 26 are bonded to the hole wall of the mold hole 44 along with the resin penetrated into the gaps between the long fiber bundles and, finally, the mold jig 40 is cooled. |
