Journal of Food, Agriculture and Environment

Vol 7, Issue 1,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

The estimation of grass mat thickness and pressing force in press process


Algirdas Jasinskas *, Egidijus Šarauskis, Dainius Steponavičius, Edvardas Vaiciukevičius, Remigijus Zinkevičius

Recieved Date: 2008-09-07, Accepted Date: 2008-12-09


An attachment to measure up the thickness of grass mats and pressing force by measuring distance between press rolls was developed in Lithuanian University of Agriculture, Institute of Agricultural Engineering. For this purpose resistor sensors of displacement were used. The motion of rolls when the press was in idle running and when it was pressing mats of different thickness of macerated grass layer was registered. It is estimated that with increasing thickness of pressing grass layer from 25 mm to 55 mm the resistance of displacement sensor decreases from 614.6 Ω to 485.6 Ω. It was established, that a 20-60 mm thick macerated grass layer was pressed to produce 2.5-7.2 mm thick mats by roll press (the thickness of grass layer decreased 8 times). Pressing force of 2.2-2.9 kN was used for pressing process. According to the research results, a nomogram was charted which can be used to determine mat thickness and pressing force according to the thickness of the macerated grass layer.


Mats, grass layer, mat thickness, sensor of displacement, pressing force

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 1
Category: Agriculture
Pages: 176-178

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