| 摘要 |
PURPOSE: To provide a structure made of plastic simple to produce, having necessary strength though light in wt., low in raw material cost and inexpensive because the number of parts is reduced and mass-production is possible. CONSTITUTION: In a structure molded by a blow molding method (1), a hollow part 2 and superposed parts 3 formed by mutually welding the opposed walls of a parison under pressure are integrally molded using a plastic molding material. In a structure molded by a blow molding method (2), the opposed walls of a parison are mutually welded to the periphery of the hollow part 2 of the structure under pressure by integral molding to form an edge part 18. |
