Method of calibrating extruded filaments

Details Method of calibrating extruded filaments Method of calibrating extruded filaments

1975-07-10

1976-11-02

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264210F, 264280, 264294, 264323, B29J 500, B29C 1700

Patent

active

039897796

ABSTRACT:
An extruder is operated continuously to produce a plastically deformable strand that is pulled through a calibrating die and a cooling by a withdrawal arrangement downstream of the die in the bath. A sensor detects the volume of the strand between the tool and the extruder and controls the withdrawal rate in accordance with the volume of the strand between the tool and the extruder so as to produce an accurately calibrated extrusion. The sensor may engage the strand at the bank formed immediately upstream of the mouth of the calibrating die or may be upstream therefrom and detect the hang or droop of the strand between the die and the extruder.

REFERENCES:
patent: 3185924 (1965-05-01), Locher
patent: 3757211 (1973-09-01), Goto
patent: 3892043 (1975-07-01), Bonikowski
patent: 3904338 (1975-09-01), Straumanis

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