Method and apparatus for controlled supply of color concentrates

Details Method and apparatus for controlled supply of color concentrates Method and apparatus for controlled supply of color concentrates

1986-02-03

1987-08-04

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 404, 264 407, 26421123, 425135, 425145, 425169, 425204, B29G 4792

Patent

active

046844880

ABSTRACT:
A method and apparatus for regulating the drive of dosaging devices for the controlled feeding of plastic particles, color concentrates and additives into a supply hopper of a screw extruder for producing a mixed plastic product of determined coloration, comprising periodically measuring the coloration of the mixed product at an outlet of the extruder by a spectrometer connected to a measurement probe, comparing the measured coloration of the mixed product with the coloration of the desired product, and adjusting the supply of the plastic product, concentrates and additives, as necessary, so that the measured coloration of the product at the outlet of the extruder is the same as the coloration of the desired product.

REFERENCES:
patent: 2540146 (1951-02-01), Stober
patent: 3352952 (1967-11-01), Marr
patent: 3583680 (1971-06-01), Aust et al.
patent: 4101613 (1978-07-01), Norwood
patent: 4107245 (1978-08-01), Jansson
patent: 4604251 (1986-08-01), Kuhman

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