What is the classification of plastic extruders? – Suzhou Polytime Machinery Co., Ltd.

The application of plastic profiles involves all aspects of daily life and industrial application. It has a good development prospect in the fields of the chemical industry, construction industry, medical and health industry, home, and so on. As the core equipment of plastic profile production, plastic extruder machine produces more and more plastic products such as PC, PE, PET, and PVC in the market. In foreign countries, plastic profiles are constantly replacing metal or other traditional materials, and are developing very rapidly.

Here is the content list:

What is the development situation of plastic extruder?

What is the composition of plastic extruder equipment?

How are plastic extruders classified?

What is the development situation of plastic extruder?
The traditional plastic extrusion control system mostly adopts the control mode of the electric control cabinet. The switches and buttons are distributed on the production line, with decentralized control, complex wiring, and high requirements for manpower. The development of electromagnetic drive or DC drive has a great impact on the maintenance efficiency of the former, but most of the latter have a great impact on the development of electric speed control equipment. With the rapid development of power electronic technology, computer technology, and automatic control technology, electrical transmission technology has also made a qualitative leap. AC variable frequency speed regulation system has become the mainstream of the extruder transmission system because of its high control precision and good speed regulation performance.

What is the composition of plastic extruder equipment?
As one of the three major plastic processing machines, the waste plastic extruder is widely used in the plastic industry. The common plastic extruder consists of a main machine, auxiliary machine, and control system (mainly composed of electrical appliances, instruments, and actuators).

The main function of the host machine is to realize the transportation, heating, and melting of plastic raw materials, including feeding system, extrusion system, museum melting system, and extrusion dies; The main function of the auxiliary machine is to cool the high-temperature Museum body with initial shape and size extruded from the machine head, set it in a certain device, and then further cool it to make it change from high elastic state to glass state at room temperature, to obtain qualified products. Its functions can be summarized as cooling shaping, calendaring, traction, and winding, including calendering traction system, water cooling system, and winding system.

How are plastic extruders classified?
According to the number of screws, plastic extruder machines can be divided into the single screw, twin screw, and multi screw extruders.

Conventional single screw extruder has the advantages of simple structure, stable operation, and long service life. It is widely used in the extrusion production of plastics such as polyolefin, polyamide, polystyrene, polycarbonate, and polyester, and the extrusion production of heat-sensitive resin PVC.

Compared with a single screw extruder, a twin-screw extruder has many advantages, such as easy feeding, good mixing, and plasticizing effect, strong exhaust performance, and so on. According to the screw distribution, it can be divided into cylindrical and conical. Twin-screw extruder plays a more and more important role in plastic processing because of its advantages such as high extrusion speed, stable feed, good mixing and dispersion effect, and good plasticization.

Compared with single and twin-screw extruders, multi screw extruders have the advantages of strong dispersion and mixing characteristics, large extrusion area, and high productivity ratio, which meet the requirements of polymer processing quality and output. A three-screw extruder is a new type of multi screw mixed extrusion equipment, which is suitable for polymer modification processing and extrusion molding.

In recent years, with the gradual improvement of people's living standards, people have put forward higher requirements for plastic products to be high-grade, personalized, color, and weather-resistant, and the demand is also increasing year by year. At present, China has become one of the largest plastic profile production bases and consumer markets in the world. Since its establishment in 2018, Suzhou Polytime Machinery Co., Ltd. has developed into one of China's large extrusion equipment production bases and has established a reputable company brand all over the world through years of experience in the plastic industry. If you have a demand for plastic extruders, you can consider our high-quality products.