B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/728, 18/763
B29C 47/52 (2006.01) B29B 7/52 (2006.01)
Patent
CA 1101168
Abstract of the Disclosure A method for maintaining balance the radial stresses acting on a rotor cylinder in an extrusion press for pasty and thermoplastic materials during variations in the operating conditions of the press, which press has a feed orifice opening into a first working chamber, comprises maintaining a layer of material compacted and molecularly adherent to the rotor wall in the feed orifice of the first working chamber of the press. This may be effected by using a pressure feed to compress the material along a narrow arc of rotor immediately upstream of the first extrusion element. The material is fed at a pressure of not less than the pressure of the initiation of adherence for the most unfavourable condition at which the pressure can be adjusted. This insures that downstream of the first extrusion element the adherent layer is maintained in perfect symmetry in every succeeding working chamber of the press and therefore the basic condition necessary to obtain equilibrium of all the radial stresses acting on the rotor is effected.
261351
Fetherstonhaugh & Co.
Gabbrielli Ernesto
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