Mixing process of open mill: adding sulphur! Factory Suppliers Manufacturers Quotes

Mixing process of open mill: adding sulphur!

After weighing the amount of the mixture and vulcanizing agent, the next thing to do is to add the vulcanizing agent, it is recommended to follow the following steps.


1, first of all, clean the mixer and ensure its cleanliness to prevent mixing other impurities. Then the roller spacing of the mixer is adjusted to the minimum, and the mixing glue is put into the mixer for thin connection. After the thin finish, the roll spacing of the mixer is appropriately enlarged, so that the mixing compound is evenly wrapped on the roller. The surface temperature of rubber compound should be around 80oC.


2. By adjusting the roller spacing and properly cooling water, the temperature of the rubber mixture can be controlled at about 60-80 degrees C. At this time, vulcanizing agent is put into the rubber mixture.


Attention should be paid to:


A, put the vulcanizer evenly in the mixing rubber instead of concentrating in one place.


B, not too fast. It is easy to drop the vulcanizate down to the bottom and not easy to disperse into the blend. This will affect the performance of the blend.


C, put the vulcanizer under the drum into the mixing compound.


3. When we do not see the curing agent and vulcanization accelerator, we will start cutting around two times. In order to disperse the vulcanizate and vulcanization accelerator into the rubber mix, we can confirm that if the vulcanizate and vulcanization accelerator change from solid to viscous silk, and then mix them into rubber, the mixing effect is good.


4. Take out the mixture to make thin pass. In the case of thin pass, the roller spacing should be adjusted to the minimum and the number of thin passes should be 4~5 times.

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When making the film, we must follow the thickness required by the product. The whole process should be noted that the completion time should not be too long, otherwise it will reduce the Mooney viscosity and physical properties.


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