Extrusion control

Details Extrusion control Extrusion control

B - Operations, Transporting

29

C

18/719

B29C 47/92 (2006.01) B29C 47/70 (2006.01) G05D 7/06 (2006.01) G05D 11/13 (2006.01)

Patent

CA 1095209

25640 EXTRUSION CONTROL Abstract of the Disclosure In an extrusion system wherein a single source of molten extrudable material is utilized to provide feed to a plurality of extrusion lines, the rate of flow of extrudable material from the source thereof to the plurality of extrusion lines is controlled to provide a preselected total product output rate. The position of a flow control valve means associated with each extru- sion line is controlled to maintain a preselected material supply pressure upstream of said plurality of extrusion lines and to provide a preselected relationship among the measured production rates of said plurality of extrusion lines. In a preferred embodiment, an extrusion system having two extrusion lines supplied by a single source of molten extrudable material is controlled to provide a preselected total production rate, a preselected molten material source pressure, and a preselected balance between the extrusion rates of the two extrusion lines.

290925

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