Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold
Patent
1974-10-16
1976-03-02
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Mold opening and closing means and segmented female mold
4254512, 425DIG223, 249168, 425444, 4254516, B29F 106, B29F 114
Patent
active
039415481
ABSTRACT:
An injection mold assembly having mold members which are movable relative to one another between closed molding positions to permit injection molding of parts within mold cavities formed by the members and open positions to permit removal or ejection of the molded parts from the cavities. The mold members are interconnected by hydraulically interconnected and powered actuator means which effect opening and closing movement of the mold members in unison. The described mold assembly includes outer mold members comprising core plates having cores which project into cavities in a central mold member to to form the mold cavities when the mold is closed and stripper plates between the central member and core plates. The hydraulic actuator means interconnect the core and stripper plates and central mold member in such a way that full opening movement of the stripper plates relative to the core plates is delayed during opening of the mold assembly to delay stripping of molded articles from the mold cores until sufficient clearance exists between the cores and central mold member to assure dropping of the articles freely from the mold into an article receiving area below the mold assembly.
REFERENCES:
patent: 2558027 (1951-06-01), Wilson
patent: 2850766 (1958-09-01), Press et al.
patent: 3141192 (1964-07-01), Benedetto
patent: 3507012 (1970-04-01), Aoki
Brown Boniard I.
Flint, Jr. J. Howard
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