Introduction to the working principle of rubber mixer
2021-08-08
The rubber mixer is a closed rubber mixer, mainly used for rubber mastication and mixing. The rubber internal mixer generally consists of a mixing chamber, two relatively rotating rotors, an upper top bolt, a lower top bolt, a temperature measuring system, a heating and cooling system, an exhaust system, a safety device, a discharge device, and a recording device. Introduction to the working principle of rubber mixer
The rubber mixer is a closed rubber mixer, mainly used for rubber mastication and mixing. The rubber internal mixer generally consists of a mixing chamber, two relatively rotating rotors, an upper top bolt, a lower top bolt, a temperature measuring system, a heating and cooling system, an exhaust system, a safety device, a discharge device, and a recording device.
When the rubber mixer is working, the two rotors rotate relative to each other, and the material from the feeding port is clamped into the roll gap and squeezed and sheared by the rotor. After passing through the roll gap, the lower edge of the top edge is divided into two parts. The gap between the front and rear chamber walls and the rotor is returned to the top of the nip. During the week of the flow around the rotor, the material is sheared and rubbed everywhere, so that the temperature of the rubber compound rises sharply, the viscosity decreases, and the wettability of the rubber on the surface of the compounding agent is increased, so that the rubber is in full contact with the surface of the compounding agent. The compounding agent agglomerates through the gap between the rotor and the rotor, the gap between the rotor and the upper and lower top cymbals, and the inner wall of the mixing chamber with the rubber compound, is sheared and broken, and is surrounded by the rubber which is stretched and deformed, and is stabilized in a broken state. At the same time, the ribs on the rotor cause the rubber to move along the axial direction of the rotor to agitate and mix, so that the compounding agent is uniformly mixed in the rubber compound.
The compounding agent is repeatedly sheared and crushed, the rubber compound repeatedly deforms and recovers deformation, and the rotor ribs are continuously stirred, so that the compounding agent is uniformly dispersed in the rubber compound and reaches a certain degree of dispersion. Since the shearing action of the rubber compound during the mixing of the internal mixer is much larger than that of the open mill, the high temperature of the rubber mixing makes the mixing efficiency of the mixer very much higher than that of the open mill. The quality of the rubber compound mixed in the mixer is mainly determined by the mixing temperature, the charging capacity, the rotor speed, the mixing time, the upper top pressure and the type of the rotor.
In rubber mixer mixing, the order of adding raw rubber, carbon black and liquid softener is particularly important, and the mixing time is usually important. Usually, the raw rubber is added first, then carbon black is added, and the carbon black is mixed into the rubber. After the basic dispersion, a liquid softener is added, which is good for mixing, improves the mixing effect, and shortens the mixing time. Liquid softeners added too early or too late, are unfavorable to refining, easy to cause uneven dispersion, prolonged mixing time, high mixing temperature is conducive to plastic flow and plastic deformation and deformation of rubber, which is conducive to rubber to solid coordination The surface of the agent particles is wetted and mixed to eat powder, but the viscosity of the rubber compound is lowered, which is not conducive to the breakage and dispersion of the compound particles. If the mixing temperature is too high, the thermal oxygen aging of the rubber will be accelerated, and the physical and mechanical properties of the vulcanized rubber will be degraded, that is, the refining phenomenon will occur; and the rubber will be scorched, so the mixer must be effective in the mixing process. Cooling measures; but the temperature should not be too low, otherwise the rubber will be scattered.
Lina Machinery specializes in internal mixers, small internal mixers, production, sales and maintenance. It has achieved remarkable results in the industry for more than ten years.
Received a number of national outstanding achievements awards, was awarded the honorary title of national high-tech enterprises, private technology enterprises, as a leading enterprise in the development of the industry, Li Naqi
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Internal rubber mixer mainly used for rubber molding and mixing of rubber, is a machine equipped with a pair of specific shapes and relative to the rotation of the rotor, adjustable temperature and pressure in the sealed state of the polymer material on the plastic and mixing of the mechanical, mainly composed of the mixing chamber, rotor, rotor seal device, feeding pressure material device, discharge device, transmission and chassis and other components.
This machine is suitable for EVA, rubber,synthetic rubber,hot melt and all kinds of chemistry raw material
to mix ,mediate and disperse, and then put into the mass production.
75L kneader mixer
Hard tooth gear reducer with well-design structure, low noise, high efficiency and long service life. The mixing shaft is made of nickel & chrome alloy steel. The high abrasion part is additional welded with imported anti abrasion welding rod, then electroplating with hard chrome which is more durable.The main mixing chamber is whole set casting by high anti abrasion alloy steel, after special dealing then electroplating with hard chrome.The anti leakage unit of side wall is made of high-tech material which is wear-resisting and easy to maintain. [M" shape of the pressure gland which make the mixing more thorough and even. The main motor ampere meter is installed in the electrical control panel, under normal running, when the pressure of the mixing chamber is too big, the current exceeds the set value, the connector will automatically adjust the gland`s up and down via the magnetic valve to remit the pressure of the mixing chamber. The mixing chamber is bigger, the diameter of the air cylinder is bigger and gear reducer is also bigger, which enhance the mixing effect,save mixing time and also save the cost.
Main parameter
Mixing capacity(L) |
75L |
Motor power |
110KW 6P AC |
Material feeding |
Front/back |
Temperature adjustment |
Steam heating or water cooling |
Mixing capacity per batching |
About 70-80kgs/time |
Mixing time |
4-8mins/batching |
Rotor RPM |
RPM |
Temperature difference |
±5º |
gear reducer |
ZLY375 |
Gear width |
Input 110mm, output 140mm |
Tilting angle |
140° |
Main air cylinder size (mm) |
360×900 |
Piston rod diameter (mm) |
120 |
Mixing chamber size (mm) |
610×600×725 |
Two rotors center to center space (mm) |
355 |
Rotor bearing diameter (mm) |
140 |
Machine size(mm) |
3900x2900x3400 |
Machine weight(kg) |
9500 |
Internal Mixer, Turnover Internal Mixer, Internal Rubber Mixer, Pressure-Type Internal Mixer
Dazhong Valve Group Co., Ltd http://www.longxuanmachines.com