Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1977-09-06
1979-05-22
Hoag, W. E.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264246, 264267, 264271, B29C 500, B29C 2100, B29D 300
Patent
active
041559720
ABSTRACT:
An improved method for molding a unitary molded product comprised of three separate plastic materials includes the first step of molding the generally highest melting point, most abrasive, most viscous plastic material to mold a first form. Subsequently, the next generally lower melting point material is molded using the first form as a mold. Finally, the generally lowest melting point material is molded. By molding in a designated order, it is possible to mold a single product comprised of multiple plastic materials without having the materials bleed into one another. Additionally, a variety of materials having distinct melting points may be used to make a unitary molded product.
REFERENCES:
patent: 3086250 (1963-04-01), Gits
patent: 3354249 (1967-11-01), Morin
patent: 3457337 (1969-07-01), Turner
patent: 3486196 (1969-12-01), Klenk et al.
patent: 3661685 (1972-05-01), Osteen
patent: 3681167 (1972-08-01), Moore
patent: 3719735 (1973-03-01), Valyi
patent: 3810815 (1974-05-01), Welhart et al.
patent: 3878282 (1975-04-01), Bonis et al.
patent: 3980744 (1976-09-01), Cogswell
patent: 3997677 (1976-12-01), Hirsch et al.
Mark, et al., Encyclopedia of Polymer Science & Tech. Interscience Pub. (N.Y.) vol. I (1964), pp. 299, 300, 306, 307 & 308 and vol. 10 (1970), pp. 468, 472, 473, 474, 475, 728, 735, 736, 749 & 750.
Hauser David A.
Parrott Thomas J.
Hoag W. E.
Keystone Consolidated Industries, Inc.
LandOfFree
Multiple-shot method of molding plastic products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple-shot method of molding plastic products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple-shot method of molding plastic products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1040420