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In plastic extrusion molding equipment, the plastic extruder is usually referred to as the main machine, while the subsequent equipment that is matched with it, the plastic extrusion molding machine, is called the auxiliary machine. After more than 100 years of development, plastic extruders have evolved from single screw to various models such as twin-screw, multi screw, and even no screw. The plastic extruder (host) can be matched with various plastic molding auxiliary machines such as pipes, films, rods, monofilaments, flat wires, packing belts, extruded nets, plates (sheets), profiles, granulation, cable wrapping, etc., to form various plastic extrusion molding production lines and produce various plastic products. Therefore, plastic extrusion molding machinery is one of the widely used models in the plastic processing industry, both now and in the future.

Plastic extruders can be divided into single screw extruders, twin-screw extruders, and multi screw extruders based on the number of screws. At present, single screw extruders are widely used and suitable for extrusion processing of general materials. The twin-screw extruder has the advantages of less heat generated by friction, more uniform material shear, greater screw conveying capacity, stable extrusion volume, longer material retention in the barrel, and uniform mixing.
Laizhou Longjun Machinery Co., Ltd. produces various large, medium and small plastic granulator production lines, PVC plastic granulators, dry film plastic granulators, water ring cutting plastic granulators, polypropylene plastic granulators, film plastic granulators, plastic crushers, plastic cutters, as well as feeding machines, spin dryers, automatic hydraulic molds, new flue gas processors, stainless steel mixing tanks, electromagnetic heating equipment and various peripheral supporting equipment. The plastic pelletizer production line, which has been developed for many years, is suitable for more than 10 types of materials, such as waste greenhouse film, woven bags, waste drip irrigation belts, mineral water bottles, etc. The pelletizing production line realizes fully automatic integrated operation of waste plastic sorting, crushing, drying, pelletizing, and bagging, which greatly saves labor costs. The products are exported to Thailand, Vietnam, Japan, Russia, Georgia, Senegal, Southeast Asia, Africa, Europe, America and other regions.