150L rear projection pressurized internal mixer factory direct sale

Closed rubber mixer, referred to as internal mixer, is mainly used for plasticizing and mixing of rubber. An internal mixer is a machine equipped with a pair of relatively rotating rotors of a specific shape, which can intermittently mold and knead polymer materials in a closed state with adjustable temperature and pressure. It is mainly composed of an internal mixing chamber, a rotor and a rotor. , rotor sealing device, feeding and pressing device, unloading device, transmission device and machine base.
Since the emergence of the real (Bunbury) type internal mixer in 2008, the power of the internal mixer has gradually been recognized by people. It has shown a series of advantages over the open mixer in the rubber mixing process. Features such as: large mixing capacity, short time and high production efficiency can better overcome dust flying, reduce the loss of compounding agents, improve product quality and working environment, safe and convenient operation, reduce labor intensity and are beneficial to the realization of mechanical and automated operations, etc. Therefore, the emergence of the internal mixer is an important achievement of rubber machinery. It is still a typical important equipment in mastication and mixing, and is still being developed and improved. Basic knowledge and structure of internal mixers
Internal mixers generally consist of an internal mixing chamber, two relatively rotating rotors, an upper ejector bolt, a lower ejector bolt, a temperature measurement system, a heating and cooling system, an exhaust system, and a safety device. , discharging device and recording device. The surface of the rotor has spiral ridges, and the number of ridges is two, four, six, etc. The cross-sectional geometry of the rotor is triangular, cylindrical or elliptical, and there are two types: tangential type and meshing type. . The temperature measurement system is composed of thermocouples, which are mainly used to measure the temperature changes in the mixing chamber during the mixing process. The heating and cooling systems are mainly used to control the temperature of the rotor and the surface of the mixing chamber chamber wall.
Working Principle
When the internal mixer is working, the two rotors rotate relative to each other, and the material from the feeding port is clamped and brought into the roller gap, where it is squeezed and sheared by the rotor. After passing through the roller gap, it hits the lower The top bolt sharp edge is divided into two parts, which are along the gap between the front and rear chamber walls and the rotor and then return to the top of the roller gap. During the flow around the rotor, the material is subjected to shear and friction everywhere, causing the temperature of the rubber to rise sharply and the viscosity to decrease, which increases the wettability of the rubber on the surface of the compound and makes the rubber and compound surface fully in contact. The compound clumps along with the rubber material pass through the gap between the rotor and the rotor, the gap between the rotor and the upper and lower top bolts, and the inner wall of the mixing chamber. They are sheared and broken, surrounded by the stretched and deformed rubber, and stabilized in the broken state. At the same time, the convex ribs on the rotor make the rubber material move along the axial direction of the rotor, which plays a stirring and mixing role, so that the compounding agent is evenly mixed in the rubber material. The compounding agent is sheared and broken repeatedly in this way, and the rubber material repeatedly deforms and recovers from deformation. The continuous stirring of the ridges of the rotor makes the compounding agent evenly dispersed in the rubber material and reaches a certain degree of dispersion. Since the shearing effect on the rubber material during mixing in the internal mixer is much greater than that of the open mixer, and the rubber mixing temperature is high, the rubber mixing efficiency of the internal mixer is much higher than that of the open mixer.