China Drying News has produced more than 25,000 sets of extruders made in China, which is one of the major products exported from China. China has a complete set of cost-effective solutions from extruder mainframe manufacturing to complete production line supply. Different from the host and its plastic products, the extruders that China can manufacture include single-screw extruders, which are suitable for processing various materials and various structures such as plates, sheets, films, wires, rods, etc. Screw extruder and conical counter-rotating twin-screw extruder, suitable for processing temperature-sensitive materials such as PVC plates, tubes, profiles, etc.; parallel co-rotating twin screw extruders, suitable for raw material blending, Filling, devolatilization, modification and building materials, adding certain devices such as melt pump, can be used for direct molding; suitable for high-fill material production of the disc extruder, reciprocating screw extruder. In recent years, with the continuous maturation and development of auxiliary equipment and mold technology, the extrusion production line has gradually become the main force of China's extruder field. PVC profile and its subsequent processing equipment, film and pipe production technology and equipment, and various cable coating technologies are all available in China. China has been able to provide 3-7 layers of multi-functional composite film production lines, 3 layers of composite chemical packaging structural film production lines, various agricultural film and film production lines, and geomembrane production lines to domestic and foreign markets. . In addition, a variety of cast film and unidirectional, biaxially stretched film production technology has also been developed, and can provide five layers of extrusion or width of more than 5 meters of extruded cast film production line. Plastic pipe can meet the demand of construction and civil engineering projects such as plastic substitute steel and plastic substitute cement. China's pipe production technology has attracted global attention, and it can supply various solid core pipes, bellows, aluminum-plastic composite pipes, polyethylene cross-linked (PEX) pipes, and cold and hot water transfer (PPR) pipes to domestic and foreign markets. Various types of production lines such as drainage pipes, wire and cable jackets, ultra-high molecular weight pipes, porous pipes, and sound-absorbing pipes. China Extrusion Technology Innovation In recent years, China's conventional extruders and production lines have gradually become popular in international markets with excellent price/performance ratio. At the same time, China continues to innovate in the field of advanced extrusion technology and has pioneered a variety of new extrusion products. Precision extrusion technology to meet the needs of high-precision machining Precision extrusion molding can eliminate the follow-up processing means, to better meet the needs of product applications, while achieving the purpose of reducing material costs and improving product quality. Today, to meet the needs of precision direct extrusion of plastic products, a variety of mature technologies have been promoted to the field. Polymer melt gear pumps are one of the important means. This technology has been widely used in chemical fiber, film, profiles, pipes, plates, cables, composite extrusion, granulation and Other production lines. After many years of systematic research on the melt gear pump, the Institute of Rubber and Plastic Machinery of Beijing University of Chemical Technology has successfully completed the series development and development of plastic melt gear pumps. Now it has been able to design and manufacture plastic melt gear pumps such as 28/28 (center Distance/tooth width), 56/56, 70/70, 90/90, etc. The maximum inlet/outlet pressure difference can reach 30MPa, which can meet the requirements of different production, and has been applied in practice to achieve good results. The Institute of Rubber and Plastic Machinery of Beijing University of Chemical Technology conducted an in-depth study on the integrated gear pump extruder and designed and developed a 115-type gear pump extruder. Gear pumps are also very useful for precision molding in the rubber industry. In order to meet the domestic demand for rubber melt gear pumps, Beijing University of Chemical Technology cooperates with Beijing Aviation Manufacturing Engineering Research Institute and Hangzhou Chaoyang Rubber Co., Ltd. to jointly develop and develop XCP150/100 and XCP120/90 rubber melt gear pumping models. The crew. This unit has ideal working characteristics to ensure a linear relationship between the extrusion volume and the rotational speed of the gear pump, which can achieve precise control of the output and improve the dimensional accuracy of the product. Multi-layer co-extrusion technology matures The multi-layered composite technology utilizes materials with medium and high barrier properties in combination with other packaging materials to achieve specific functional requirements by combining the high barrier properties of the barrier materials with other materials such as low cost or special mechanical, thermal, and other properties. The structural design of the coextruded composite film gradually requires the ability to systematically achieve the desired state of integration of function, technology, cost, environmental protection, safety, and secondary processing, so that the possibility of maximizing the number of composite layers becomes the technology pursued by suppliers. one. Seven-layer composite film co-extrusion blow molding technology of Guangdong Jinming Plastic Equipment Co., Ltd. can be described as a typical example of China's development in this field. The key technologies used in the seven-layer composite film co-extrusion blow molding machine include two short and one-pitch screw pitch plastic extrusion systems, an engineering analysis software optimized design of the vibration-induced plasticizing device, and a planar valve plus forming die And oblique valve plus molding die, internal cooling technology and dual-tuyere negative pressure cooling technology, multi-component loss-weight metering feeding, on-line film thickness precise control system, computer centralized automatic control system and bus control (CANOPEN) technology. As the number of layers increases, film production technology that adapts to special functions is also one of the hot topics in the development of the field. Recently, Guangdong Shicheng Company designed and manufactured a PP green wood grain film casting line with a width of 3150mm. The production line capacity exceeds 800kg/h. The screw is designed for high-speed shearing, mixing, and high-efficiency plasticizing screw. Customers can directly use high-filled calcium carbonate powder and inorganic pigment toner, thereby saving expensive raw material costs. In addition to the production of PP environmental protection grain film production, the entire line can also be flexibly converted to produce other products and broaden the customer product range. In the Shicheng company's trial production process, not only produced a beautiful PP wood grain film, but also produced CPP film, PP stationery film and PP stationery sheet. Auto Switches,Switches For Auto,Automotive Switches,Car Switches NINGBO BOWENTE AUTO PARTS CO., LTD , https://www.autorefrigerationparts.com