Type and design principle of injection molding machine barrel screwType and design principle of injection molding machine barrel screw
Type and design principle of injection molding machine screw
Type of injection molding machine barrel screw:
Mutant screw characteristics: the compression section is short, and the energy conversion is severe during plasticization, which is mostly used for crystalline plastics such as polyolefin and PA.
2. Universal type
Universal screw features: The universal screw with strong adaptability can be applied to the processing of a variety of plastics to prevent frequent screw replacement.
3. Gradient type
Gradient screw characteristics: long compression section, smooth energy conversion during plasticization, mostly used for plastics with poor thermal stability such as PVC.
Type and design principle of injection molding machine barrel screw
The design principle of injection molding machine barrel screw:
The main part of the pin screw is a general screw. The pin can be placed in the melting section of the screw or the metering section or the lubricating cylindrical surface without a groove at the end of the metering section. The pins need to be set according to a certain placement method, and the density and density can vary.
Mixed sections are all inwardly slotted structures set at the end of the general screw homogenization section, the outer diameter of which is equal to the outer diameter of the screw. The grooves are divided into several groups, and between each group is a collection area of materials. The material is cut by the groove, and then gathered at the assembly area, and then cut and assembled. The principle is similar to the pin type.