Shaping tool for an extruder or calibrator for thermoplastic mat

Details Shaping tool for an extruder or calibrator for thermoplastic mat Shaping tool for an extruder or calibrator for thermoplastic mat

1986-08-18

1988-01-26

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

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

Control means responsive to product weight or dimension

264 405, 2641761, 310328, 310369, 425150, 425466, B29C 4792

Patent

active

047214473

ABSTRACT:
The shaping device, particularly for an extruder tool or calibrator unit, for an extruder for thermoplastic material comprises at least one outlet defining an adjustably positionable unit lip, an opposing lip and at least one positioning member acting on the unit lip which is a part of a control and/or regulating mechanism for the thickness of the extruded product. The positioning member is a piezoelectric translator connected to a voltage source having a plurality of piezoelectric disks positioned opposing each other which are combined in a plurality of groups according to operation and according to electrical circuitry considerations. The groups of the piezoelectric disks individually and the sum total of several of the groups including the group containing all of the piezoelectric disks are connectable to the voltage source.

REFERENCES:
patent: 2938231 (1960-05-01), Lowey, Jr.
patent: 3610969 (1971-10-01), Clawson et al.
patent: 3883279 (1975-05-01), Heyer
patent: 3940221 (1976-02-01), Nissel
patent: 4011474 (1977-03-01), O'Neill
patent: 4125350 (1978-11-01), Brown
patent: 4454441 (1984-06-01), Taniguchi
patent: 4471256 (1984-09-01), Igashira et al.
patent: 4515738 (1985-05-01), Anders
patent: 4592710 (1986-06-01), Reifenhauser et al.
Elektronik, 1984, pp. 92-96, (8/19.4,S.92).

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