Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Patent
1979-08-22
1982-02-16
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
264313, 26432811, 425575, B29F 100
Patent
active
043158854
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: 3066351 (1962-12-01), Schriner
patent: 3557404 (1971-01-01), Zippel
patent: 3609815 (1971-10-01), Rudolf
patent: 4050873 (1977-09-01), Brumlik
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