The Screw and Barrel for Vertical Injection Molding Machine manufacturer tells you that the screw is located inside the barrel of the injection molding machine, so it cannot be seen from the outside. The manufacturer of Screw and Barrel for Vertical Injection Molding Machine tells you that its main functions are conveying, melting, mixing, compressing and metering, so it plays a very important role in plasticizing quality, and it can be said to be the heart component of injection molding , which is closely related to the quality of molding.
The whole screw is divided into three sections:
1. Feeding section
The manufacturer of Screw and Barrel for Vertical Injection Molding Machine tells you that the solid particles are fed into the screw groove by the barrel. Due to the rotation of the screw, a shearing effect is formed, and the temperature conduction of the rubber barrel begins to melt, that is to say, through this section, the The granular rubber is plasticized into a liquid form.
2. Compression segment
The manufacturer of Screw and Barrel for Vertical Injection Molding Machine tells you that the main function is to continue to melt, knead, shear, compress, pressurize, exhaust, and the plastic will be completely dissolved and the volume will be reduced in this section. The design of the degree of compression of the screw (compression ratio) is very important.
3. Metering section
The manufacturer of Screw and Barrel for Vertical Injection Molding Machine tells you that the main functions are mixing, melting and conveying, and it also provides enough pressure to maintain a uniform temperature of the melt and stabilize the flow of molten plastic. If the metering section is long, the mixing effect is good. , but too long will make the melt stay in the melt for too long to cause thermal decomposition, while too short will make the temperature uneven and the plasticizing and melting effect is poor.