Apparatus for the chip-free manufacture of axially symmetrical s

Details Apparatus for the chip-free manufacture of axially symmetrical s Apparatus for the chip-free manufacture of axially symmetrical s

1977-12-15

1979-04-24

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Serially arranged with preform reshaping means

425385, B24C 1700

Patent

active

041509340

ABSTRACT:
An apparatus for manufacturing axially symmetrical solid bodies such as ear plugs or sealing members made of a soft resilient expanded plastics foam material wherein a die adapted to cooperate with a cutting matrix for punch-pressing is provided with means for pre-stressing the punched foam material prior to the actual cutting operation for obtaining bodies of different shapes. This pre-stressing means may consist of a dowel, a recess or a curved surface at the die head and/or projections, bevel surfaces, vacuum chambers at the cutting table. The die may be cylindrical, annular, square or of any other desired configuration.

REFERENCES:
patent: 2900665 (1959-08-01), Walker
patent: 3329177 (1967-07-01), Bishop et al.
patent: 3517410 (1970-06-01), Rapisarda
patent: 3517415 (1970-06-01), McGrath et al.

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