These type of oil Expeller are composed to such components as electric appliances control, hot pressing, adjustment, driving and vacuum oil filter. The squeezing worm is made of alloy steel treated by carburization to improve its surface hardness and wear resistance, the squeezing bars are grinded by surface grinder to ensure the accuracy of oil thread and improve oil extraction rate, the standard components for power distribution, vacuum and heating are famous brands to optimize machine configuration, the surface of machine are treated by stainless steel and chromium plating technology in accordance with the standard of food hygiene.