The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1986
Filed:
Jan. 27, 1984
John East, Highworth, Wiltshire SN6 7DX, GB;
Ian Maxwell, Caversham, Reading, Berkshire, GB;
Other;
Abstract
A continuous extrusion machine, in which feedstock is admitted (at 50) to a peripheral groove (12) in a rotating wheel (10), is enclosed in that groove by a cooperating shoe (24), and is frictionally dragged along an arcuate passageway (48) formed by said groove and a projecting portion (30) of said shoe towards an abutment (36) carried by the shoe. The abutment tip and adjacent wheel parts disposed downstream of the abutment are cooled directly by a jet of cooling fluid issuing from a nozzle (64) carried downstream on the shoe. An annular band (FIG. 2, 74) of a good thermally-conductive metal embedded concentrically in the wheel enhances the cooling obtained. The extrusion apparatus yields a metal product (FIG. 5, 102) which is threaded through a treatment die (104) to change its cross-section, and is continuously drawn therethrough by a tensioning device (106,112) under the control of a system which (a) senses the temperature of the product (102) as it leaves the extrusion apparatus (100); (b) converts a temperature signal ( 120) so produced, in a function generator (124), into a tension reference signal (126); (c) compares with that tension reference signal a tension feedback signal (116) derived from a sensor (118) adjacent the extrusion apparatus; and (d) controls the tensioning device in accordance with the difference of the tension reference and feedback signals so as to prevent the sensed tension in the product extending between the extrusion apparatus (100) and the treatment die (104) from exceeding a safe value which is less than the yield stress tension of that product at the sensed temperature.