In the plastic extrusion equipment, the plastic extruder is usually referred to as the main machine, while its supporting follow-up equipment, the plastic extrusion machine, is referred to as the auxiliary machine. After more than 100 years of development, plastic extruders have been derived from the original single screw into twin-screw, multi screw and even non screw models. The plastic extruder (main machine) can be matched with various plastic forming auxiliary machines, such as pipe, film, holding material, monofilament, flat wire, packing belt, extrusion net, plate (sheet) material, profile, granulation, cable coating, etc., to form various plastic extrusion forming production lines and produce various plastic products. Therefore, no matter now or in the future, plastic extrusion molding machines are widely used in the plastic processing industry,.
The extrusion method of plastic pipe extruder generally refers to melting the plastic at a high temperature of about 200 degrees, and the melted plastic will form the required shape when passing through the mold. Extrusion molding requires a deep understanding of plastic properties and rich experience in mold design. It is a molding method with high technical requirements. Extrusion molding is a method in which materials are heated and pressurized in an extruder to continuously pass through the die in a flowing state, also known as "extrusion". Compared with other forming methods, it has the advantages of high efficiency and low unit cost. Extrusion method is mainly used for the molding of thermoplastics, and it can also be used for some thermosetting plastics. The extruded products are all continuous profiles, such as tubes, rods, wires, plates, films, wire and cable coatings, etc. In addition, it can also be used for mixing, plasticizing granulation, coloring, blending and so on. The extruded product can be called "profile". Because the cross-section shape is mostly irregular, it is also called "profile".
As a common basic equipment, extruder is often used in the plastic processing industry. However, since China is mainly based on high power, if it is not energy-saving, it will consume a lot of resources.
In the process of starting and heating the pipe extruder, the temperatures of several sections are turned on at the same time to start heating. Of course, this method is also commonly used. However, after the screw temperature reaches a certain index, the temperature of the die head often does not reach the steel in the die head, which is thick and has a large area). Therefore, in this case, the screw is generally insulated, Then start the operation after the temperature of the die head slowly rises to the set temperature. This method is the first power on.
Of course, there is another thing to pay attention to. In the process of heating and starting up, a simple sequential heating can help you save a lot of electric energy. When several heating sections are heated at the same time When the temperature of the screw of the plastic extruder reaches the set temperature, you start to record the time, and then record the time when the die temperature reaches the set temperature. There is a time difference, that is, how many minutes is the time difference between the screw reaching the set temperature and the die reaching the set temperature? Find out the time difference. The next time you start the machine, you should heat up the die head so long in advance of the time difference. When the time difference is reached, you can turn on the screw heating. This can also save power.
