There are many benefits to using vacuum in a rolling mill: 1、 It is to roll and knead the product in a vacuum state, which will increase the physical volume of the product and make it soft. Make the resulting product taste better. 2、 Rolling and kneading the product in a vacuum state will reduce the generation of heat during friction and impact. And the product will not oxidize in a vacuum state. Therefore, it will not cause the product to deteriorate during the rolling process. Thirdly, the physical structure of the product swells under vacuum, which is beneficial for the absorption of auxiliary materials