An overview of the screw press is to produce oil processed into edible vegetable oil processing machine machinery. The oil can be well retained oil nutrients and original taste. People conform to the traditional diet habits.Its simple process, high applicability, small investment, quick effect, easy operation, widely used in very large rural oil processing industry in China.Screw press at present, the social ownership around 2 million units, 10 billion kg, processing oil every year nearly 300 million farmers for the supply of oil.palm oil millﾧ,Designed a measurement in the bore spiral oil press pressure solution, and a test has been completed in the screw press machine. Using experimental stress analysis, according to the resistance strain gage on the surface of the paste in a squeeze tube appearance output strain data, calculate the pressure in the chamber. Test data is helpful to the study of the machine pressing process, the measurement method can be used for other screw extruder with the determination of the pressure in the chamber.bucket elevatorﾧ，For double low rapeseed dehulling seed kernel exists in the process of cold pressed some of the key technical problem, put forward the double order multi-stage crushing cold pressed structure model, the existing screw press press chamber structure is improved, the design and manufacture a kind of small experimental cold pressing machine.On the machine, the operating parameters affect the performance of peeling seed kernel of cold pressing on the experimental study, the results showed that the oil mill set at low speed (r/min) for oil cold pressed, to moderate conditioning into the oil materials (moisture at 6.4%) can improve oil extraction efficiency, less than 5% of the kernel skin content request is appropriate.Cold pressed peeling rapeseed kernel always wait the aniseed tube temperature below 70 ℃, ensure the need of cold pressed.The research results will provide with cold expeller pave the way for the...