Four major trends in the development of plastic extruders

After more than 100 years of development, plastic extruders have been derived from the original single-screw, twin-screw, multi-screw, and even no-screw models. Plastic extrusion molding machinery is one of the most widely used models in the plastics processing industry, no matter now or in the future. The following is a brief introduction to the development trend of plastic extruders:

(1) The extruder is developing in the direction of large-scale, high-speed and high-efficiency. Foreign extruders with screw diameters of 200-250mm are very common, and special extruders with screw diameters greater than 400mm are not uncommon. Increasing the screw diameter can improve the production capacity of the extruder. When the screw diameter is doubled, the production capacity of the extruder can be increased several times.

(2) The auxiliary equipment of the extruder has also been perfected and standardized to meet the requirements of different plastic products.

(3) Extrusion automation, microcomputer is used to detect and control the process parameters of the extruder, and the temperature difference can be controlled within ±1 °C. The extrusion equipment adopts microelectronic technology, which makes the plastic extrusion molding process develop in the direction of accuracy, precision, energy saving and automation.

(4) In order to meet the requirements of new materials and new processes, new or special extruders appear constantly. Such as three-screw extruder and planetary multi-screw, no-screw extruder, reactive extruder, two-color extruder, foaming extruder, etc.

Today, modern plastic extruders have generally adopted modern electronic and computer control technology, online detection of the entire extrusion process, and the use of microcomputer closed-loop control. In order to meet the diversified needs of production development, plastic molding technology has developed towards modern high-efficiency mass production and intelligent control.