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Application of weightless feeder in plastic modification operation
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In the processing of special plastic materials, it is often necessary to mix synthetic resins and other basic materials with necessary auxiliary materials (such as mineral powder, glass fiber) and additives (such as plasticizers, flame retardants, antioxidants, nucleating agents, etc.) according to a certain proportion and enter the blending extruder. This formula mixing process is called plastic mixing (Plasticscompounding). Plastic mixing can be traced back to the birth of celluloid in 1870. Since then, with the development of plastic coloring, blending, filling, reinforcing and other modification technology, a variety of general plastics and engineering plastics blending technology has been improved. By the late 1970s, 60% of the thermoplastic plastics in the world had to be blended and then processed with special materials or even one-time molding products. Meanwhile, the research and development of various blending equipment (co-rotating twin screw, reciprocating single screw, continuous mixer, etc.) had also made great progress.

At present, with the increasing demand for product quality, working conditions and automation, the application of weightlessness is becoming more and more widespread. It is estimated that there are about 20,000 twin-screw extruder production lines in the domestic market, of which less than 8% are equipped with weightlessness scales. In the past year, the proportion of 2,000 new production lines equipped with weightlessness scales is gradually increasing, the proportion is about 10-20%, but the overall proportion is still very low, and the proportion of developed countries in 60-70% or higher. It is predicted that market demand for weightlessness will be explosive in the next few years.

In large-scale, continuous plastic processing, the basic need for weightlessness scale with auxiliary peripheral equipment, such as storage system, automatic feeding to achieve a complete feeding function.

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