Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1990-11-30
1992-09-29
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
264322, 425383, B29C 4302
Patent
active
051512335
ABSTRACT:
Thermoforming apparatus and methodology is provided to form a breakaway port in a molded piece, such as a container lid. The apparatus includes a forging assembly that has a punch element and a striker assembly, so that a material blank that is heated to a plastic state by an oven may be advanced therebetween. When the thermoforming mold closes, a striker element and the punch element come together with a striking force so that a portion of the blank is forced against a male profile on the punch element to forge the port by forming lines of reduced thickness that are partible under mechanical force but which normally maintain the integrity of the molded piece against the passage of fluids. The striker element can be adjustably spring biased and can be mounted, for example, to the pressure box of the thermoforming mold while the punch element is positioned on the mold assembly that provides the mold configuration for the piece to be formed. When the thermoforming mold closes, the restorative force of the spring provides the striking force. The male profile is provided by ribs having a truncated triangular cross-section that provides the necessary geometry to create partible lines without severing the material of the production blank. The apparatus can perform a continuous cyclical process, and a trimming assembly can cut the molded pieces from a contnuous sheet of material advanced through the thermoforming mold.
REFERENCES:
patent: 3211034 (1965-10-01), Andris
patent: 3524566 (1970-08-01), Parks
patent: 3735653 (1973-05-01), Powell
patent: 3945528 (1976-03-01), Mowrey
patent: 4009981 (1977-03-01), Rosen
patent: 4090660 (1978-05-01), Schram et al.
patent: 4377084 (1983-03-01), Kaminski
patent: 4518096 (1985-05-01), Winstead
patent: 5025947 (1991-06-01), Leone
Hoag Willard
Martin Timothy J.
Rewoldt Dana S.
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