• What is an oil expeller press?
  • French custom designs, manufactures and supports oilseed preparation equipment and screw presses, sometimes referred to as oil expeller presses. These oil extraction machines gather vegetable oil from oil-bearing seeds and nuts for food and industrial uses, including biodiesel and other fuels.
  • How does expeller pressing work?
  • The oil seeps through small openings that do not allow seed fiber solids to pass. Afterward, the seeds are formed into a hardened press cake, which is removed from the machine. Pressure involved in expeller pressing creates heat in the range of 140¨C210 ¡ãF (60¨C99 ¡ãC).
  • What temperature can an expeller press be used for?
  • In the case of harder nuts (which require higher pressures) the material can exceed temperatures of 120 ¡ãF (49 ¡ãC). An expeller press is a screw-type machine that mainly presses oil seeds through a caged barrel-like cavity. Some other materials used with an expeller press include meat by-products, synthetic rubber and animal feeds.
  • Why is mechanical seed preparation important?
  • The mechanical seed preparation is primarily important to gain access to the oil droplets within the cellular structure of the seed. However, total destruction of the cell walls leads to a ground product which lacks sufficient structure to allow for pressure buildup and oil separation.
  • What is the difference between expander and expeller?
  • The expander is a unit assigned to seed or product preparation, whereas the expeller is the machine for mechanical oil separation from plant material or similar solid-liquid separation tasks.
  • Who invented the oil expeller?
  • The name of the expeller and the expelling process go back to an invention of Anderson International Corp. It has been patented by Mr. Anderson and protected by the corresponding trademark. Through early licensee agreements the expeller soon became the standard machine in the modern oil milling industry worldwide.