Weibulen specializes in the production of 10L metal internal mixers and 10-liter metal powder internal mixers. The 10L metal internal mixer is specifically designed for mixing various metal powders in the MIM process, including stainless steel powder mixing, iron powder mixing, titanium alloy mixing, tungsten alloy mixing, copper alloy mixing, and more. The 10L metal internal mixer can process 45 kg per batch, with excellent dispersion effects and a low maintenance rate, earning the favor of numerous MIM customers.


I: Parameters of the 10L Metal Internal Mixer

Mixing Capacity-------------------------------10L

Drive Motor-------------------------------15KW

Tilting Motor-------------------------------0.75KW

Tilting Angle-------------------------------110°

Output----------------------------------45KG (per batch)

Dimensions (Height*Width*Length)-------------------------2.2*1.35*2.15M

Machine Weight-----------------------------------2300KG

II: Working Principle of the 10L Metal Internal Mixer

When the 10L metal internal mixer is in operation, the two rotors rotate relative to each other, gripping the material from the feed port and pulling it into the roll gap, where it is subjected to squeezing and shearing by the rotors. After passing through the roll gap, the material hits the sharp edge of the lower ram and is divided into two parts, which then return to the area above the roll gap along the gaps between the front and rear chamber walls and the rotors. During one cycle of flow around the rotors, the material is subjected to shearing and friction at every point, causing its temperature to rise sharply and its viscosity to decrease. This enhances the wetting of the rubber on the surface of the compounding agents, ensuring full contact between the rubber and the compounding agent surfaces. The agglomerates of compounding agents pass through the gaps between the rotors, between the rotors and the upper and lower rams, and between the rotors and the inner wall of the mixing chamber along with the rubber, where they are sheared and broken apart, enveloped by the stretched and deformed rubber, and stabilized in their broken state. At the same time, the protrusions on the rotors cause the rubber to move axially along the rotors, providing a stirring and mixing effect that ensures uniform distribution of the compounding agents in the rubber. The repeated shearing and breaking of the compounding agents, along with the repeated deformation and recovery of the rubber and the continuous stirring by the rotor protrusions, result in uniform dispersion of the compounding agents in the rubber to a certain degree of dispersion. Due to the significantly higher shearing action and higher mixing temperature in the internal mixer compared to the open mill, the efficiency of mixing in the internal mixer is much higher than that of the open mill.

III: Operating Procedures for the 10L Metal Internal Mixer

1. Calculate the batch mixing quantity and actual formula based on the capacity of the internal mixer's mixing chamber and an appropriate fill factor (0.6–0.7);
2. Accurately weigh the various raw materials according to the actual formula, and arrange the raw rubber, minor ingredients (ZnO, SA, accelerators, antioxidants, solid softeners, etc.), reinforcing agents or fillers, liquid softeners, and sulfur separately in order on the storage rack;
3. Turn on the power switch and heating switch of the internal mixer to preheat it, while checking whether the air pressure, water pressure, and voltage meet the process requirements, and whether the temperature measurement system, timing device, power system indicators, and recording are normal;
4. After preheating the internal mixer, allow it to stabilize for a period before starting the mixing process;
5. Raise the upper ram, feed the raw rubber cut into small pieces into the mixer through the feed port, lower the upper ram, and mix for 1 minute;
6. Raise the upper ram, add the minor ingredients, lower the upper ram, and mix for 1.5 minutes;
7. Raise the upper ram, add carbon black or filler, lower the upper ram, and mix for 3 minutes;
8. Raise the upper ram, add liquid softeners, lower the upper ram, and mix for 1.5 minutes;
9. Discharge the rubber, measure its temperature with a thermocouple thermometer, and record the initial temperature of the mixing chamber, the temperature of the mixing chamber at the end of mixing, the discharge temperature, power consumption, and rotor speed;
10. Adjust the roll gap of the open mill to 3.8 mm, turn on the power switch to start the open mill, open the circulating water valve, then feed the rubber discharged from the internal mixer onto the open mill for banding. When the rubber temperature drops below 110°C, add sulfur, cut the rubber from both sides twice each, wait until all the sulfur is incorporated and the rubber surface is relatively smooth, then cut off the rubber.
11. Adjust the roll gap of the open mill to 0.5 mm, feed the rubber for thin passing, make triangular folds, thin pass five times, adjust the roll gap to about 2.4 mm, feed the rubber for banding, wait until the surface is smooth and free of bubbles, sheet off the rubber, weigh the total mass of the rubber, place it on a flat, clean metal surface to cool to room temperature, attach a label indicating the rubber formula number and mixing date, and allow it to rest for future use.
For each batch mixing process test report of the internal mixer, record: starting mixing temperature, mixing time, rotor speed, upper ram pressure, discharge temperature, power consumption, the difference between the mass of the mixed rubber and the total mass of raw materials, and the type of internal mixer.
Note: When starting mixing experiments, first mix a batch of rubber with the same formula as the test rubber to adjust the working state of the internal mixer before正式 mixing; for the same batch of mixed rubber, the control conditions and mixing time of the internal mixer should remain consistent.