GB1456740A - Controllable profile roll - Google Patents

Abstract

1456740 Rollers PROCTER & GAMBLE CO 22 April 1974 [23 April 1973] 17489/74 Heading F2U A rotatably mounted roll 20 has separate temperature control of the working surface 56 and of the substantially solid core 57 of the roll so that the physical profile of the roll can be controlled substantially independently of the heat and load experienced by the surface 56. As shown roll 20 has at its centre an elongate electric heater 22 (supplied by a wire 27 and a slip ring and brush unit 23 from a controller 24). The surface 56 is cooled by fluid supplied from a manifold 38 through radial passages 53 to axial passages 55 subjacent surface 56, the fluid passing out through further radial passages and a manifold 39. The roller 20 is positioned in a mill along with a roll 28 (which may be the same as roll 20), these forming a nip 29. If a great enough pressure is experienced in the nip it will be wider in the middle, at 29<SP>1</SP>, than at the ends, 2911, and if heat is supplied from heater 22 the roll will be slightly crowned, and these effects can be made to cancel one another out substantially, by means of controller 24. The mill can roll dough, or plastics material. The roll 20 may be used as a calender roll.