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The Cold Oil Press and the Hot Oil Press
2013-01-29

The Cold Oil Press and the Hot Oil Press

In recent years, with the rising living standard of the people, people more and more favor cold oil press in edible oil aspects.

Cold oil press is press raw materials without heating or low temperature condition, directly send them into the oil press. Squeeze out the oil temperature is low, acid value is low, generally do not need refining, after precipitation and filter for petroleum products.

With pure natural characteristics, cold press oil avoids the traditional high temperature oil processing produce adverse effect.

Cold pressing product keep the oil natural flavor and color, complete preserved the oil physiological active substances (vitamin E with anti-aging function, sterol has skin tonic effect and enhance the human body metabolism), cold oil keep its own flavor, it is the choice of healthy life.

But most of the oil is not suitable for cold pressing, for example soybean, high erucic acid rapeseed, cottonseed, peanut, sesame. Soybean oil contains bean smell, high erucic acid rapeseed oil has the pungent taste, cottonseed oil has the gossypol toxin and metamorphic oil has the aspergillus flavus toxin, etc., all of them must pass refining to remove. Besides, the fragrance of sesame oil and superfine fragrant peanut oil must pass through the hot pressing process to get.

oil press

Cold pressed oil raw material must pass a choice, or due to raw materials and raw materials of different maturity contained in the harmful substances (such as: the aspergillus flavus toxin mildew oil and cotton seed of gossypol toxin), will has a serious influence to the quality of the cold pressed oil. General mining said, cold pressed oil’s the smoke point is low, water content is not stable, go against the long-term storage.

In general, cold pressing need to crush the raw material, and then the oil rate will go up, sometimes we also need to press in twice, in three times.

Hot pressing are used for large machine preparing to squeeze, also is the first oil, but there are also some manufacturers improved after model directly used for oil, do not need other equipment, such as our machine is developed using the three sections of mechanical squeezer three cage bar composition, basically material embryo time can have very good yield efficiency.

oil mill

Our daily life edible vegetable oil is mostly hot oil, the oil rate of is high, operation is simple. Most of the oil mill use hot pressing in our country. That is cleaning, broken before high temperature heat treatment and then the oil internal will happen a series of change, failure fuel cells, make protein denaturation, reduce oil viscosity in order to make it suitable for press take oil and improve yield efficiency. But after the high temperature treatment of oil squeeze out hair oil color slants deep, acid value rise, and so hair oil must be refined to eat.

At the same time, that high temperature presses oil makes the biological active substance (vitamin E, sterol, class hu gross BuSu, etc.) of the oil raw materials loss by large in the press process, so it waste resources.

Cold oil machine has the characteristics of natural, and avoid the traditional high temperature oil processing produce adverse effect. Cold pressing product to keep the oil natural flavor and color, complete preserved the oil physiological active substances (vitamin E with anti-aging function, sterol has skin tonic effect and enhance the human body metabolism). Cold oil keeps its flavor, so it is the choice of healthy life.

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