How Do We Get Oil From Seeds And Nuts?

Do you want to make oil? Do you have seeds? Getting oil can be hard.

Getting oil from seeds and nuts involves steps. We first clean the material. Then we press it. Sometimes we clean the oil more. This makes food oil.

Let me tell you how we do this. The whole process has different parts. Each part is important. We start with raw material. We end with finished oil.

What Happens Before We Press The Oil?

You have seeds or nuts. They are not ready yet. You need to prepare them first.

Before pressing, we clean and prepare the material. This helps get more oil. It makes the oil better. This step is called preprocessing.

This part is very important. If the seeds are dirty, the oil will be dirty. If they are not ready, you get less oil. We do different things here. It depends on what seed or nut you have.

Cleaning Is First

Seeds from farms have dirt. They have stones. They have pieces of plants. We must take these out. We use cleaning machines. These machines shake. They blow air. They pick out bad things. Clean seeds work better.

Then We Might Change Them

Some materials need more work. Nuts need shells taken off. This is hulling. Machines do this. Some seeds are hard. We crush them. This breaks them into smaller pieces. This helps the oil come out later.

Heating And Flaking Can Help

Some seeds have the best effect after heating. This makes the oil flow better and helps to separate proteins from the oil. A frying machine can do this. Some seeds have been roasted. This will damage the cells inside. When pressed, more oil will flow out.

Preprocessing makes sure the material is clean. It makes sure the material is ready for pressing. This step needs different machines. We connect these machines. They work together.

How Does The Machine Get The Oil Out?

You have the prepared material now. It is clean. It is ready. Now you get the oil out.

Machines press the material. They use force. The oil comes out. This is the pressing step.

This is the main part. We use strong machines. These machines push the material hard. The oil flows away. The solid part stays. This solid part is called cake. We use different types of presses.

Screw Presses Are Common

Many people use screw presses. A screw turns inside a barrel. The screw pushes the material forward. The space gets smaller. This builds pressure. The pressure squeezes the oil out. The oil comes out through small gaps. The cake comes out the end.

Hydraulic Presses Use Force

Some materials work better with hydraulic presses. This machine uses a piston. The piston pushes on the material. It squeezes it in a cage. This uses very high pressure. It is good for some special oils. It is often a batch process.

Making Pressing Efficient

We control the temperature in screw presses. Heating the barrel helps oil flow. Automatic systems can do this. We control how fast the screw turns. We control the gap where the cake comes out. All these things help get more oil. They make the machine work well.

We build presses that work non-stop. They can press many tons per day. We use good materials for the screw. This makes it last long. We use simple controls. Workers can run the machines easily.

Why Do We Need To Clean The Oil More?

You have oil now. But it might not look good. It might not smell good. It might have things in it.

After pressing, the oil is crude. It has impurities. We clean the oil more. This is called refining.

Crude oil from the press is not finished. It has small pieces of seed. It has gums. It has fatty acids. It has color. It has smell. Refining equipment can remove all these things. It makes the oil clear. It makes it taste good. It makes it last longer.

Removing Gums And Acids

First, we often remove gums. This is called degumming. We add water or acid. The gums become solid. Then we separate them. Next, we remove fatty acids. This is called deacidification. We can use alkali. The alkali reacts with acids. They form soap. We wash the soap away. Or we can heat the oil very high. This makes the acids evaporate. This is physical refining.

Taking Out Color And Smell

Crude oil has color. We take this out. This is decolorization. We add special clay. The clay absorbs the color. Then we filter the clay out. Crude oil can have a strong smell. We take this out too. This is deodorization. We heat the oil under vacuum. We inject steam. The steam carries away things that smell.

Zhengzhou Fude Machinery offer machines for all these steps. We have tanks and vessels. We have filters. We have heating systems. We can build small refining lines. We can build big ones. They can be simple or automatic. They make the oil food grade. Or they make it ready for other uses.

Getting oil needs steps: prepare, press, then clean. Each step is important for good oil.