The word rubber comes from the Indian language and means "tree that weeps". Rubber is native to the western region of Mara Yue in the Brazilian Amazon. The open mill is a product of the times. After understanding many characteristics of rubber, the emergence of the open mill is inevitable. The open mill is the earliest and most basic rubber machinery in the rubber industry with a relatively simple structure. As early as 1820, human-driven single-roll trough rubber mixers appeared. With the continuous development of rubber technology, open mills are also constantly updated and replaced. Gradually evolved into an indispensable machine in rubber craftsmanship. The times are progressing all the time, and people are also progressing with the times. The mill has changed from manual at first to automatic today, but we may not know how much sweat of scientists and laborers has been paid, but the fruits of labor we enjoy today The reason why we can see higher and farther places now is because we stand on the shoulders of giants, predecessors planted trees, and future generations enjoyed the shade. Today, the use of open mills has been significantly reduced. Even if it is perfect and beautiful, we cannot guarantee that the mill will not be eliminated. Will the training opportunity be eliminated? We don't know it now, but it existed, and it stirred up turbulent waves in the long river of history. We dare not predict the future, but we can grasp the present, and the mill is always irreplaceable.

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The open mixer was born earlier than the internal mixer. When the internal mixer just came out, people's recognition of the internal mixer was not high, until it took a long time, and the world recognized it. The advantages of the internal mixer are, to a certain extent, more convenient, safer, more efficient, and more hygienic than the open mixer. At present, the open mill cannot be replaced, and the production of tablets requires an open mill, rubber, silica gel, special rubber, etc. with high temperature control requirements. These must use open mills. Therefore, the application of open mills still has great value. Although 88% of all rubber products in the world come from internal mixers, I estimate that there are still 20%. Left and right from the mill.