What is an Open Mill and What Are Its Functions?

An open mill, short for open plastic mill, is commonly referred to as a two-roll mill in plastic product factories. It stands as one of the earliest plastic mixing equipment utilized in plastic product manufacturing plants. In a calender production line, the open mill is positioned after the mixer and before the calender. Its primary function is to mix and plasticize uniformly blended raw materials, supplying a more homogenously mixed and plasticized melt for the subsequent calendering process of plastic products.

When it comes to cable material production, the open mill can directly melt and plasticize powdered materials formulated according to specific recipes into molten substances. These molten materials are then pressed and shaped into sheet-like tapes, which can be cut into pellets by a pelletizer. On the floor leather production line, the open mill serves to directly provide a uniformly mixed and plasticized primer coating for cloth leather. Additionally, recycled waste plastic films or sheets can be re-plasticized on an open mill, enabling material recycling.

The open mill boasts a simple structure, making it easy to manufacture, operate, maintain, and disassemble. These advantages contribute to its widespread application in plastic product companies. However, it also has drawbacks. Workers often have to perform physically demanding tasks, manually mixing materials in a high-temperature environment. The frequency and quality of manual mixing of plastic sheets significantly influence the overall mixing quality of raw materials.

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What is an Open Mill and What Are Its Functions?

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