Multiple rotary casting machine

Details Multiple rotary casting machine Multiple rotary casting machine

1976-06-18

1977-04-12

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

425 4R, 425159, 425258, 425435, 4254501, 425817R, B29D 2704

Patent

active

040172341

ABSTRACT:
A machine and method are disclosed whereby multiple casting units simultaneously produce foamed-plastic tubular articles which may be of different shapes and sizes. All units are served from a single supply of foamable material, and in each unit rotation of an annular mold develops a homogenous longitudinal and radial distribution of foaming plastic. The foaming plastic is introduced into each mold rotation, the cavity being closed to permit foamed filling of the mold, and a polymerizing cure is effected prior to mold opening and product removal. The particular machine herein described includes provision for coordinated shot size for foamable material into each of the plural mold cavities, whereby regardless of the mold-cavity size at particular casting units, the shot size (of foamable plastic material) is automatically determined, for uniform or predetermined density in the ultimate products regardless of size variation produced at the respective casting units.

REFERENCES:
patent: 2042975 (1936-06-01), West
patent: 3293024 (1966-12-01), Luertzing
patent: 3328836 (1967-07-01), Axelsson
patent: 3574888 (1971-04-01), Holaday
patent: 3790320 (1974-02-01), Snelling et al.

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