| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow core reduced in the use amt. of a low m.p. alloy and to produce a hollow resin product using the hollow core. SOLUTION: A low m.p. alloy layer 30 is formed on the outer peripheral surface of a pipe 10. The pipe 10 is made of aluminum or a heat-resistant resin. The low m.p. alloy layer 30 constitutes the molding region of a hollow resin product. The pipe 10 is arranged to a casting mold 20 and a low m.p. alloy is injected into the gap between the pipe 10 and the casting mold 20 to form the low m.p. alloy layer 30 on the outer peripheral surface 17 of the pipe 10. A hollow core A wherein the low m.p. alloy layer 30 is formed on the outer peripheral surface 17 of the pipe 10 is arranged in an injection mold and a resin is injected into the injection mold and the hollow core A and, thereafter, the pipe 10 and the low m.p. alloy are taken out of an injection-molded resin cured object. |
