| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for molding an object comprising a plurality of materials capable of joining a plurality of resin materials after the resin materials are separately molded without increasing a new process for joining. SOLUTION: After a case main body 3 being a primary molded object and a valve 4 being a secondary molded object are injection-molded using first and second resin materials, the resin required at the time of next molding of the primary or secondary molded object is metered and the back pressure obtained at the time of the metering process is utilized to inject the first or second resin to join the previously molded case main body and the valve.
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