Injection molding machine barrel screw has excellent mixing and plasticizing ability, the material in the extruder in the short stay time, suitable for powder processing. The screw of injection molding machine has the characteristics of large output value, fast extrusion speed and low energy consumption of output value. However, the use of injection molding machine barrel screw often appear in the process of small episodes, such as screw fracture. Let's analyze why this happens to the barrel screw of the injection molding machine.
Under the action of the barrel screw of the injection molding machine, the granular plastic stored in the hopper moves continuously along the screw groove. Due to the combined effect of heating outside the barrel and shearing of the screw of the injection molding machine barrel, the plastic is continuously heated and softened to form a viscous flow state of the melt, and the melting force of the screw head pushes the screw back. By changing the screw back pressure (working oil return resistance) to adjust the screw oil return speed, change the plastic flow state in the screw groove of the injection molding machine barrel, to control the plastic plasticizing performance.
Cone twin barrel screw is operated under high temperature, certain corrosion, strong wear and high torque. Therefore, it is necessary for cone twin barrel screw to meet high temperature resistance and no deformation under high temperature. Wear resistance, long life; Corrosion resistance, corrosive materials; High strength, acceptable large torque and high speed; Good cutting function; Small residual stress after heat treatment, small thermal deformation, etc.
The cone twin-barrel screw has a certain mechanical strength of ordinary metal material as the base metal, and in its inner hole working surface in addition to the composite layer of special alloy material protective layer of the pipe composition. This layer has a certain thickness and a certain hardness of the alloy protective layer according to the different conditions of its use or have both wear and corrosion resistance. This layer of protective layer is evenly attached to the base metal, and interlocked with the base metal on the metallographic phase without falling off, forming a solid whole.
The technology of cone twin-barrel screw is one of the more commonly used in recent years. The cone twin-barrel screw is a combination product with excellent corrosion resistance and wear resistance. High-speed spraying equipment is used to spray the surface of the screw to obtain a compact cone twin-barrel screw. The cone twin-barrel screw adopts the method of melting and casting, the alloy of high carbide composition and the barrel are cast into one body, and the special technology is used for precision molding.
The cone twin-barrel screw is an important part of the injection molding machine and the core of the injection molding machine. It can be said that the correct use and maintenance of the cone twin-barrel screw play a decisive role in the production efficiency and service life of the injection molding machine. Want to effectively extend the service life of the cone double barrel screw, the correct cleaning and use is the key.