Presses – Methods – Forcing through constricted passage
Patent
1992-06-29
1993-10-12
Coe, Philip R.
Presses
Methods
Forcing through constricted passage
100 35, 100 45, 100 47, 100905, 100157, 100 99, 425DIG230, B30B 1122
Patent
active
052515451
ABSTRACT:
A pellet mill (1) is provided with a control unit with the help of which a desired value of press roll slippage, e.g. zero or a pre-selectable peak value can be maintained. For this purpose, the pellet mill (1) comprises a first measuring unit (27, 28) for measuring the circumferential speed of the perforated die (8) as well as a second measuring unit (23, 24) for measuring the circumferential speed of the press rolls (11, 12). In a comparator (30, 31), the two circumferential speeds are compared and on exceeding a pre-selectable peak value for the difference of the two measured values, a slip signal is created by means of which the mill drive, and/or the supply of basic material to be formed is influenced in such a manner that the slippage will be prevented.
REFERENCES:
patent: 3932736 (1976-01-01), Zarow et al.
patent: 4238432 (1980-12-01), Henderson et al.
patent: 4463430 (1984-07-01), Volk, Jr. et al.
patent: 4711622 (1987-12-01), Schaffner
patent: 4770621 (1988-09-01), Groebli et al.
patent: 4838779 (1989-06-01), Vries
patent: 4861529 (1989-08-01), Groebli et al.
Journal "Electronic" 24/18 Nov. 1986 p. 112.
Alexander Reginald L.
Buhler AG
Coe Philip R.
Farber Martin A.
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