压榨法有悠久的历史,它的工艺过程比较简单:把原料蒸熟、炒熟以后,用机械的方法把油从油料中挤压出来。
The pressing method has a long history, and its technological process is relatively simple: after steaming and frying the raw materials, the oil is squeezed out of the oil by mechanical methods.
古老的压榨法,需要操作人员付出繁重的体力劳动。而挤压过的油渣(油饼)中,残油含量相当高,因而浪费了极为宝贵的油料资源。现代的压榨法已是工业化自动化的操作,与老式设备相比，正常出油率可高出2至3个百分点，每加工百斤花生米平均可多出2-6斤，全年经济效益十分可观。
The ancient pressing method requires operators to pay heavy manual labor. In the extruded oil residue (oil cake), the residual oil content is quite high, thus wasting extremely valuable oil resources. The modern pressing method is already an industrialized and automated operation, and the normal oil yield can be 2 to 3 percentage points higher than that of the old equipment.
从压榨的原料的预处理来区分有冷榨法和热榨法，也叫熟榨法。
From the pretreatment of pressed raw materials, there are cold pressing and hot pressing.
冷榨就是原料不经过烘炒或者蒸制直接将原料投入榨油机挤压出油，这种方法油品颜色相对比较浅，色彩更加明亮，但出油率低，而且油料味道不浓厚，香醇。
Cold pressing means that the raw materials are directly put into the oil press to squeeze out the oil without roasting or steaming. This method is relatively light in color and brighter in color.
而熟榨要把油料作物在压榨前经过烘干，目的是降低原料水分，增加油脂分子的活跃性和流动性，从而提高出油率，保证油质味道的香浓。但也破坏了油品的化学组织成分，导致油的颜色更深，更黑。
In cooked pressing, the oil crops are dried before pressing. The purpose is to reduce the moisture of the raw materials and increase the activity and fluidity of the oil molecules, thereby improving the oil yield and ensuring the aroma of the oil.
油料被挤压出油过程：当油料进入榨油机榨膛内，随着榨膛旋转，压力增大。采用多级推进渐进加压的原理，使榨膛压力迅速增大，使油料一次性裂变分离，自动控制压榨温度和水份，使油料直接软化激活油脂分子，压榨稳定，一次榨尽，大大提高了出油率。
The process of the oil being squeezed out of the oil: When the oil enters the press chamber of the oil press, the pressure increases as the press chamber rotates. Using the principle of multi-stage advancement and progressive pressurization, the pressure of the pressing chamber is rapidly increased, the oil is separated by fission at one time, and the pressing temperature and water content are automatically controlled, so that the oil is directly softened and activated. oil yield.
采用高碳钢，经高温淬火、耐热处理而成，硬度高，强度大，耐磨性好，适应高温高压连续作业，提高了榨油机的使用寿命，使用时间可达几十年之久。
螺旋榨油机，一机多用，可榨花生、胡麻、芝麻、菜籽、油葵、棉籽、大豆等30多种油料作物。多级压榨，一次榨净。
Made of high-carbon steel, quenched at high temperature and heat-resistant, it has high hardness, high strength, and good wear resistance. It is suitable for continuous operation at high temperature and high pressure, and improves the service life of the oil press. .
Screw oil press, multi-purpose machine, can squeeze more than 30 kinds of oil crops such as peanut, flax, sesame, rapeseed, oil sunflower, cottonseed, soybean and so on. Multi-stage pressing, one pressing.
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