Whether it is necessary to shell peanuts(shelling machine) for peanut oil extraction is a common problem. Generally speaking, shelling is a necessary step for the following reasons:

First of all, the quality of oil squeezed out after shelling is higher. Peanut shells contain some impurities and ingredients that are not conducive to the quality of oil products. Removing these ingredients can improve the purity and taste of oil and make the final product more popular with consumers.

Secondly, shelling can improve the oil yield. Peanut shells occupy a certain volume. If the shells are not shelled, the machine needs to deal with more substances when extracting oil, which may lead to a decrease in oil yield. By shelling, the oil in peanuts can be extracted more effectively and the production efficiency can be improved.

Besides, shelling(shelling machine) can also reduce the wear and tear on the oil press. Peanut shells are hard, which may cause wear and tear to the machine during oil extraction, increasing the maintenance cost and service life of the equipment. After removing the peanut shell, the machine runs more smoothly and reduces the risk of mechanical failure.

Finally, the by-products after shelling are more valuable. Peanut shells can be used as feed, fertilizer or other industrial raw materials, while shelled peanut residues can be used to make other products, which improves the utilization rate of resources.

To sum up, in order to improve oil quality, oil yield, reduce equipment wear and increase the value of by-products, it is a wise choice to shell peanuts before oil extraction.