The experiments of cold pressing of cottonseed and castor bean were carried out to study the stress-strain relationship and the stress-compression ratio relationship. The effects of rate of applied pressure on the stress-strain relationship and the stress-compression ratio relationship were investigated. The methods of identification of critical pressing pressure were proposed. Hyperbolic stress-strain model and calculative model of compression ratio of oil plant were developed on the basis of the Kawakita's Equation. The results of the experiments indicate that effects of rate of applied pres...
