Resin molded articles and method of manufacturing the same

Details Resin molded articles and method of manufacturing the same Resin molded articles and method of manufacturing the same

2005-08-09

2005-08-09

Miggins, Michael C. (Department: 1772)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S035700, C428S159000, C428S213000, C428S304400, C428S339000, C062S288000, C062S297000, C062S530000, C312S229000, C312S236000

Reexamination Certificate

active

06926940

ABSTRACT:
In a method of manufacturing a resin molded article, resin including a foaming agent is injected into a cavity defined in a mold assembly. Then, a movable mold of the mold assembly is moved to partly expand the cavity so that the foaming is promoted at the part where the cavity is expanded. Therefore, a high foamed portion having voids therein and a low foamed portion having an expansion ratio less than that of the high foamed portion are integrally formed in the resin molded article.

REFERENCES:
patent: 4473665 (1984-09-01), Martini-Vvedensky et al.
patent: 6685875 (2004-02-01), Usui et al.
patent: 4-215544 (1992-08-01), None

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