Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1985-08-28
1988-01-12
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 404, 264 405, 264 407, 264171, 26417719, 264237, 425140, B29C 4792
Patent
active
047190710
ABSTRACT:
A method particularly suitable of monitoring the production of elongate profiles which are formed from one or more mixtures of rubber or thermoplastic material in an extrusion head which is fed by one or more extrusion devices is disclosed as in an apparatus which is particularly suitable for carrying out such a method. During production, the strip passes through a cooling path or station in which longitudinal shrinkage thereof occurs. The desired shrinkge is known and the actual shrinkage is monitored by suitable means. These means are operatively connected to a regulating or control device. When leaving the head, the profile passes over a weighing device which determines the weight per unit length thereof. The weighing device is also operatively connected to the regulating or control device. If a deviation from the desired shrinkage in the zone or station is ascertained, the regulating device sets a new, corrected, desired weight per unit length value to be achieved at the weighing device. To achieve this desired weight per unit length, the drives for the extrusion devices are each adjusted by a uniform mount by the regulating or control device. By achieving the desired weight value, the desired amount of shrinkage in the cooling path or station is achieved.
REFERENCES:
patent: 2382177 (1945-08-01), Schanz
patent: 3250841 (1966-05-01), Reinhart
patent: 4097566 (1978-06-01), Bertin et al.
patent: 4171193 (1979-10-01), Rahlfs
patent: 4515738 (1985-05-01), Anders
Hermann Berstorff Maschinenbau GmbH
Thurlow Jeffery
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