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Factors affecting mixing effect of internal mixer.
The number and type of edge 1. rotors, edge number shear speed, but the heat is high, shorten the mixing time, mixing quality influence. Influence of rotor type, shear type dispersion zone between the rotor edge and the mixing chamber, the stress range is large and wide, large shearing force, high efficiency, good mixing quality. Mesh type is dispersed in between two rotors, shear strength, low heat, long mixing time better dispersion effect.
2. pressure
Thrombolytic effect of glue on the top is kept in the mixing chamber for mixing in the work area,
The pressure caused by a lack of rubber in the mixing chamber and the rotor surface sliding
The appropriate pressure can reduce the gap in material, increase the contact force
The pressure can make the rubber temperature, mixing power increase
Loading capacity is insufficient, the pressure is not fully play the role of rubber are unevenly distributed
3. temperature
Each kind of rubber has its best mixing temperature range
The type and amount of rubber reinforcing agent, softening agent, mixing temperature rise situation decision
At the same temperature, mixing time and better dispersion
4. filling amount
/P>The type of rubber formulation, reinforcing filler and plasticizer
Rubber plasticity large load should be bigger
Filling coefficient (weight) between 0.65~0.75, the load of insufficient mixing cannot obtain the necessary shear force
5. feeding order, the order of different effect
In the automatic mixing system I choose the basic (using multistage mixing, according to material requirements)
Rubber - provided Tuo - plus filler / compounding agent - pressure - provided: Tuo Tuo Tuo put pressure, softener -- pressure - discharging provided Tuo Tuo
6. speed
Speed and proportional to the shear rate, shear rate, uniform mixing speed
To improve the speed causes the glue temperature, cause the viscosity and shear stress decreased
7. time
How many, formula of temperature mixing time and filling amount rise of various mixing temperature influence time, speed, density of mixer pressure will affect the mixing time, so in the mixing process to shorten the auxiliary time and feeding time.
8. cooling water
The cooling water temperature is generally set at 15 degrees, low viscosity glue is not easy to use hot water cooling, sticky rotor, high viscosity glue feed water cooling, improve the cooling water temperature can shorten the mixing time, reduce energy consumption, improve production efficiency.