ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The two main materials used for insulating wire are plastic and pulp. With the introduction of digital transmission techniques, there has been an increasing demand for improved cable quality, thereby stimulating an investigation of the insulating process in order to improve quality. The increasing availability of digital computers enabled mathematical models of the insulating process to be constructed, which together with experimental work, provided a basis for the installation of computerized control systems. This paper reviews three such models which were developed and are being used. These comprise a model for screw extrusion, a model for melt flow in the wire coating die, and a model for the subsequent cooling of the insulated wire (or cable). Relatively little work was done in the area of dynamic simulation of the insulating process and we found computer control systems could be relatively easily installed in production provided high level software process modules with interfaces to a high level programming language were available on the system. It was found that simplified control schemes were usually the most effective in production. Two computer control installations to illustrate this viewpoint are described - a multiline central computerized control system, and a single-line microprocessor-based system.
Additional Material:
14 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760240905
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