1. Cooling: after the compound is pressed, the temperature of the compound is about 100℃. If it is not cooled in time, the compound is easy to burn, and it is easy to produce adhesion in the process of parking.

2. Parking: after cooling, the rubber material should be parked for more than 8h to use, the purpose -- (1) to restore the fatigue of the rubber material, relax the mechanical stress when mixing, reduce the shrinkage of the rubber material; (2) In the process of parking, the compound can still continue to spread in the rubber material, improve the uniformity of dispersion, but also can make the rubber and carbon black further generated between the combined rubber, improve the reinforcing effect.

3. Filter rubber: some thin wall, airtight performance requirements of good products of rubber material (such as inner tube), to filter rubber, in order to remove the impurities may be brought into the mixing.