No matter what type of extruder, they must include the following 5 main components: feeding mechanism, screw and its transmission mechanism, inner groove shell sleeve (commonly known as screw sleeve), material flow stopper (commonly known as die head), and material flow cutoff device (also known as cutting mechanism). Feeding mechanism The feeding parts of an extruder come in two forms, horizontal and vertical, each equipped with a hopper to receive and hold the material to be extruded and transport it to the screw. Screw can usually be said that the screw is the most important part of the extruder, it not only determines the curing and gelatinization function strength of the extruder, but also determines the quality of the finished product. The screw jacket enclosed outside the screw can be made into an integral structure, but is usually equipped with a jacket for use as a circulating heating of steam or superheated oil, or as a circulating cooling of water, the purpose of which is to enable the extrusion machine to accurately regulate the temperature of the various working areas. Die head in the end of the screw sleeve, usually equipped with a variety of shapes of holes in the die plate, generally known as the die head. The die head has dual functions: to mold the extruded material into the desired shape; Used as a choke to increase the pressure in the curing area of the extruder. Cutting mechanism, after the molding of extrusion material, must be assembled cutting mechanism. Cutting mechanism required to have the function of the requirements are: can be pressed after the extrusion material, according to the specified length requirements, evenly cut into a neat surface of the product.