US 12,435,470 B2
Method for optimizing the refining energy during an operation of refining of a fiber composition
Hugues Grossmann, Châlons-en-Champagne (FR); and Alain Lascar, Saint Maurice (FR)
Assigned to KADANT LAMORT, Vitry le Francois (FR)
Appl. No. 18/848,860
Filed by KADANT LAMORT, Vitry le Francois (FR)
PCT Filed May 30, 2023, PCT No. PCT/EP2023/064372
§ 371(c)(1), (2) Date Sep. 19, 2024,
PCT Pub. No. WO2023/232766, PCT Pub. Date Dec. 7, 2023.
Claims priority of application No. 2205115 (FR), filed on May 30, 2022.
Prior Publication US 2025/0207327 A1, Jun. 26, 2025
Int. Cl. D21D 1/20 (2006.01)
CPC D21D 1/20 (2013.01) 18 Claims
OG exemplary drawing
 
1. A method of optimization of the refining energy supplied by a refiner to a fiber composition during a refining operation, the refiner comprising at least two refining disks separated from each other by an adjustable gap, said method comprising the following steps:
a) setting an initial refining energy set point,
b) measuring a vibration of the refiner, to obtain a corresponding vibration signal which depends on the gap,
c) comparing at least one characteristic of the vibration signal with a determined maximum value and a determined minimum value so as to:
c1) if the characteristic of the vibration signal is lower than the maximum value and higher than the minimum value, resume the method from step b),
c2) if the characteristic of the vibration signal is higher than or equal to the maximum value, automatically decrease the initial refining energy set point down to a lower set point value, and automatically increase the gap so that the refining energy tends towards the lower set point value, and
c3) if the characteristic of the vibration signal is lower than or equal to the minimum value, automatically increase the initial refining energy set point up to a higher set point value, and automatically decrease the gap so that the refining energy tends towards the higher set point value,
wherein the lower set point of step c2) or the higher set point of step c3) is kept constant for a time interval of at least 5 seconds, whatever the vibration measured during said time interval, and
wherein the characteristic of the vibration signal comprises an acceleration of the refiner.