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expeller pressing : ウィキペディア英語版
expeller pressing

Expeller pressing (also called oil pressing) is a mechanical method for extracting oil from raw materials. The raw materials are squeezed under high pressure in a single step. When used for the extraction of food oils, typical raw materials are nuts, seeds and algae, which are supplied to the press in a continuous feed. As the raw material is pressed, friction causes it to heat up; in the case of harder nuts (which require higher pressures) the material can exceed temperatures of .
==Overview==
An expeller press is a screw-type machine that presses oil seeds through a caged barrel-like cavity. Raw materials enter one side of the press and waste products exit the other side. The machine uses friction and continuous pressure from the screw drives to move and compress the seed material. The oil seeps through small openings that do not allow seed fiber solids to pass through. Afterward, the pressed seeds are formed into a hardened cake, which is removed from the machine. Pressure involved in expeller pressing creates heat in the range of . Some companies claim that they use a cooling apparatus to reduce this temperature to protect certain properties of the oils being extracted.〔(Spectrum Expeller Pressed vs. Cold Pressed )〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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