Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1977-07-08
1979-08-28
Rosenbaum, Mark
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
425575, 425588, 425453, 425DIG44, B29F 1022
Patent
active
041659600
ABSTRACT:
A molding apparatus and method of molding or casting liquid resins and the like, are provided which includes flexible molding means. In one form, the mold is composed of two endless flexible belts, each of which is driven in an endless path with a portion of each belt driven parallel to a portion of the other belt and in contact therewith such that cavities formed in each belt come into alignment with each other when the belts make contact. Fast setting plastic liquid resin molding material is injected either at the side of or from the ends of the belts as they come together and flows into the cavities formed in the belts to continuously form a molded material or individual molded articles between the belts. After the molding material has solidified in the cavities between the belts, the belts are automatically driven apart and the molded articles removed from the cavities therebetween. In one form, removal of the molded articles is effected by a mechanical device or devices located at the exit end of the belts. In another form, a stationary scraping device or devices engages either or both belts and removes the molded articles therefrom. In yet another form, fluid under pressure is applied to the molded articles between the belts and blows or otherwise removes the articles therefrom. If the liquid is injected at temperature, the belts may be driven in a path through a tank of coolant liquid or fluid coolant material may be sprayed against the belts as they are driven.
REFERENCES:
patent: 2532131 (1950-11-01), Van Voorst
patent: 3557404 (1971-01-01), Zippel et al.
patent: 4050873 (1977-09-01), Brumlik et al.
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