Do you know which stages the mixing process of the open mill is divided into

The mixing process of the open mill is divided into three stages: rolling, powder feeding, and turning.

The operation process is as follows: Put the raw rubber or plastic rubber, mother rubber, etc. into the gap between the two rollers of the open mill along one side of the large tooth wheel, control the roller spacing at 3-4 millimeters, roll for 3-4 minutes, and wrap it around the front roller to form a smooth and seamless wrapped roller rubber. At this time, remove the rubber, adjust the roller spacing to 10-11 millimeters, and then put the rubber into the kneading machine for about 1 minute. Cut off a portion of the excess glue according to the amount of wrapping roller glue, and keep some accumulated glue at the end of the wrapping roller glue.

Then the mixer is turned on to add the compounding agent in the order of the ingredients, and the compounding agent is rolled into the rubber. This process is called the powder feeding process. When adding the filler, attention should be paid to allowing the powder to naturally enter the rubber and mix thoroughly with the rubber. Do not use the cutting knife too early. At the same time, gradually adjust the roller spacing to keep the amount of accumulated rubber within an appropriate range. After the powder is finished, the remaining rubber is cut off and divided into two ends by the central cutting knife. Then slowly add the liquid softener and continue rolling for 4-5 minutes. After mixing, cut off one roll to reduce the accumulation section.

The purpose of kneading is to further mix the rubber material evenly. There are several methods of kneading, such as the inclined knife method, the eight knife method, the bundling operation method, the triangular wrapping method, and the tamping method (the walking knife method). The effective method is the eight knife method, which involves rolling and cutting at a 45 ° angle parallel to the axis of the roller, four times from left to right, kneading for 3-4 minutes. After kneading is complete, adjust the roller spacing to 4-5 millimeters again, and then use the cutting method to supplement kneading 2-3 times. Finally, park the lower piece. The roller greenhouse is controlled at around 45 ℃. The entire mixing process of the open mill is completed.

According to different material formulas, the details of the steps are also adjusted.