Static molds – Container-type molding device – And an inner removable core to form recess or opening
Patent
1982-09-27
1984-08-28
Hoag, Willard E.
Static molds
Container-type molding device
And an inner removable core to form recess or opening
425577, B29C 114, B29F 1022
Patent
active
044679947
ABSTRACT:
A mold which comprises a number of circumferential throttles, at least partly located on the sides of the cavity and core parts respectively. The throttle distance is significantly shorter than the adjacent wall thickness, the pitch between throttles is such that stacking of the molded product is possible. The mold may comprise a number of feed channels leading from one throttle to the next throttle. The mold differs among other factors from the prior art by its short throttle distance, by its flow channels, by the throttles being located on the sides of the products, and the number of throttles being more than one. The throttles improve the rigidity of the molded thin-walled hollow product. When the molded product is a hand-held venting cup the throttles prevent buring of the fingers.
REFERENCES:
patent: 2434594 (1948-01-01), Schultz
patent: 3375554 (1968-04-01), Blumer
patent: 3397266 (1968-08-01), Ayres
patent: 3995008 (1976-11-01), Spiegelberg
patent: 4165062 (1979-08-01), Mitchell
patent: 4264295 (1981-04-01), Hingley
Kunststoffe, vol. 51, No. 10, 1961, Munchen, H. Giastrov, "Spritzgusswerkzeug fur Tablettenrohrchen".
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