Injection molding method of polyamide resin molded article

Details Injection molding method of polyamide resin molded article Injection molding method of polyamide resin molded article

B - Operations, Transporting

29

C

B29C 45/17 (2006.01) B29C 45/14 (2006.01) B29C 45/70 (2006.01)

Patent

CA 2390220

The present invention relates to an injection molding method of a polyamide resin molded article in which an already-molded article comprising a polyamide resin is set in a molding die and, then, the polyamide resin that has been heated to be in a molten state is injection-filled in a cavity to which a part of said already-molded article faces thereby integrally molding an additional molding part onto the part of said already-molded article, wherein a primer comprising an alcohol solution containing the polyamide resin and a chemical that is capable of dissolving the polyamide resin is applied to a predetermined integral molding part of said already-molded article with the additional molding part and, then, the thus primer-applied already-molded article is set in the molding die. According to the present invention, when an additional molding part comprising a same resin as that of an already-molded article which comprises a polyamide resin is injection-molded against the already-molded article, they can be integrated while securing a sufficient bonding strength therebetween only by an application of a primer.

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