With the continuous development of the current era, science and technology are also advancing day by day, and the development of all walks of life is also changing with each passing day. Today, Plastic Extruder Suppliers are here to introduce you to the development history of plastic extruders and its categories.
The Plastic Extruder originated in the 18th century. The manual piston extruder used to manufacture seamless lead pipes manufactured by Joseh Bramah of England in 1795 is considered the first extruder in the world. Since then, in the first 50 years of the 19th century, extruders were basically only used in the production of lead pipes, the processing of macaroni and other foods, the brick making and ceramic industries.
In the development process as a manufacturing method, the first clearly documented was R. Brooman's patent in 1845 for the production of Goodbo glue wires with an extruder. H. Bewlgy of Goodbo Company subsequently improved the extruder and used it to coat the copper wire of the first submarine cable between Dove and Calais in 1851. In the following 25 years, the extrusion method became more and more important, and the manual extruder was gradually replaced by the electric extruder. The early mechanically operated plunger extruder produced thousands of kilometers of insulated wires and cables, thus firmly establishing the position of extrusion for the production of cables. The early extruders for cable production were all plunger types, whether they were manual, mechanical or hydraulic. In this production process, the plunger presses the hot gutta-percha glue into the die with the copper wire, and the gutta-percha glue is extruded from the die, thus covering the copper wire to form an insulating layer.
Single Screw Extruders
Plastic extruders can be divided into single screw extruders, Twin Screw Extruders and multi-screw extruders according to the number of screws. At present, the single screw extruder is the most widely used and suitable for the extrusion processing of general materials. Due to the fact that the twin-screw extruder has less heat generated by friction, the shearing of the material is relatively uniform, the conveying capacity of the screw is large, the extrusion volume is relatively stable, the material stays long in the barrel, and the mixing is uniform.
Single screw extruder occupies an important position as a plasticizing and granulating machine or forming processing machine. In recent years, single screw extruder has made great progress.
The twin-screw extruder has good feeding characteristics and is suitable for powder processing. It has better mixing, venting, reaction and self-cleaning functions than the single-screw extruder. It is characterized by processing and blending plastics with poor thermal stability. The material time shows its superiority. Based on the twin-screw extruder, in order to make it easier to process blends with poor thermal stability, a multi-screw extruder, such as Guanghua Plastic Extruder, has been developed.
1. According to the number of screws, it is divided into single screw extruder, twin screw extruder and multi-screw extruder;
2. According to whether there is a screw in the extruder, it is divided into screw extruder and plunger extruder;
3. According to the operating speed of the screw: Ordinary extruder: speed is below 100r/min, high-speed extruder: speed is 100~300r/min, ultra-high speed extruder: speed is 300~l500r/min;
4. According to the extruder assembly structure classification: there are integral extruder and separate extruder;
5. According to the spatial position of the screw in the extruder, it can be divided into horizontal extruder and vertical extruder;
6. According to whether the extruder is vented during processing, it can be divided into vented extruder and non-vented extruder.
Through this article, do you have a new understanding of plastic extruders? Plastic extruders are now widely used, and hope to continue to play the role of plastic extruders in future life and production.