To provide a method and apparatus for molding a resin molding preventing the expansion of a blow-molded article from being hindered.
In the molding of a resin molding 24, after a foamable resin 31 is injected into the hollow blow-molded article 23 formed by blow-molding a parison, the core part 13 of a mold 10 is moved in the mold opening direction by a prescribed quantity to enlarge the volume of the cavity of the mold 10, and the blow-molded article is expanded by promoting the foaming of the foamable resin. When the blow-molded article is expanded by moving the core part, by decompressing the cavity of the mold through an opening 15 formed in the cavity surface of 13c of the core part by using vacuum equipment, the part of the blow-molded article which is to be stretched with the expansion of the blow-molded article is adsorbed on the cavity surface of the core part opposite to the part to be stretched of the blow-molded article.
| JPH0422619 | MANUFACTURE OF RESIN MOLDING |
| JP3271846 | LARGE-SIZED SEPTIC TANK |
| WO/2022/252689 | MANUFACTURING METHOD BASED ON 3D PRINTING AND INJECTION MOLDING |
OGAWA JUNICHI
ICHIHARA YOHEI
SHINOMORI MASATOSHI
Mitsuo Tanaka
Hiroshi Kano
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