Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Patent
1983-03-08
1986-04-29
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
264 407, 264 459, 264174, 364172, 425113, 425144, 425145, 425 8170, B29C 4792, B29C 4702, B29C 6722, G05B 1132
Patent
active
045856036
ABSTRACT:
There is disclosed a method for controlling an extrusion line for foamed insulation cables. In this method, a foaming insulation compound composed of a polyolefin resin and a foaming agent is supplied to an extruder, and extruded and coated as a foamed insulation onto a continuously fed cable conductor at a temperature higher than a decomposition temperature of the foaming agent to produce a cable that is subsequently passed through a cooler unit for controlling the outside diameter and electrostatic capacity of the foamed insulation. The system is controlled so that a plurality of measured variables including a plurality of controlled variables such as the outside diameter and the electrostatic capacity and condition variables affecting the controlled variables, such as a cylinder temperature of the extruder, a crosshead temperature of the extruder, a resin temperature and a resin pressure in the crosshead, are variable in predetermined correlation with a plurality of manipulated variables as input parameters which vary the controlled variables, such as a line speed of the extrusion line, a voltage applied to a preheater disposed in front of the extruder, an RPM of a screw in the extruder, a voltage applied to a cylinder heater in the extruder, a voltage applied to a crosshead heater, and a distance which the cooler unit is movable. The controlled variables are controlled so as to be adjusted into target values therefor by manipulation variables which are produced by effecting an integrating action on variable factors which are derived from the differences between the target values and the controlled variables.
REFERENCES:
patent: 3473008 (1969-10-01), Bay et al.
patent: 3714952 (1973-02-01), Bristol
patent: 3914356 (1975-10-01), Dembiak et al.
patent: 3941534 (1976-03-01), Hunkar
patent: 4088430 (1978-05-01), Giles
patent: 4174236 (1979-11-01), Dougherty et al.
patent: 4229392 (1980-10-01), Shimano et al.
patent: 4257991 (1981-03-01), Kirjavainen
patent: 4260351 (1981-04-01), Takano et al.
patent: 4298887 (1981-11-01), Rode
patent: 4326255 (1982-04-01), Fujita
patent: 4344142 (1982-08-01), Diehr, II et al.
patent: 4359436 (1982-11-01), Henderson et al.
patent: 4399105 (1983-08-01), Tilgner et al.
patent: 4406399 (1983-09-01), Furuta et al.
Izawa, Keisuke, Guide for Automatic Control, Tokyo, Japan, OHM Publishing Co., Feb. 20, 1964, pp. 6-7.
Grabbe, Eugene M.; Simon Ramo and Dean E. Wooldridge, Handbook of Automation, Computation and Control, New York, N.Y. John Wiley & Sons, pp. 20-62.
Chestnut, Harold and Robert W. Mayer, Servomechanism and Regulating System Design, vol. 1, "The Automatic Control Problem," New York, N.Y., John Wiley & Sons, Mar. 1958, pp. 2-3.
McGraw-Hill Dictionary of Scientific and Technical Terms, Daniel N. Lapedes, Edt., Second Edition, New York, McGraw-Hill, pp. 920-921.
Brasch, Frederick M. and James B. Pearson, "Pole Placement Using Dynamic Compensators" in IEEE Transactions on Automatic Control, vol. AC-15, No. 1, The Institute of Electrical and Electronic Engineers, Inc., Feb. 1970, p. 34.
Modern Dictionary of Electronics, Rudolf F. Graf, Indianapolis, Ind., Howard W. Sams & Co., Inc. and The Bobbs-Merrill Co., Inc., pp. 149, 180 and 248.
Englander, Arnold, "The Benefits and Problems of P.I.D. Feedback Control", Wire Journal, Sep. 1981, pp. 234-239.
Degen, R. J., "Entwurf und Simulation Eines Adaptiven Regelungssystems mit Modellabhleich"; Regelungstechnik, vol. 24, No. 1, 1976, pp. 24-27.
MacFarlane, A. G. J.: Stevenage; "Multivariable-Control-System Design Techniques: A Guided Tour", Proceedings IEE, vol. 117, No. 5, May 1970, pp. 1039-1047.
Young, S. C. K., "Raw Material Blending--A Multivariable Control Problem"; IEE Conference Publication, No. 78, Sep. 1971.
Asaka Kazuhiko
Furuta Katsuhisa
Nakamura Yoshinori
Anderson Philip
Showa Electric Wire & Cable Co., Ltd
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