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1) natural rubber: a section of plasticizing: 0.5 ~ 1mm roller pitch will be broken open, thin through the drop plate, so repeat the machine to the specified time or number of times. Generally 10 ~ 15min, depending on the plasticity requirements of the appropriate increase or decrease in the number of times, and then hit the triangle package, parked 4 ~ 8h cooling, to wait for the second section of plasticizing or use.
The second section of the plasticizing: a section of plasticizing the raw rubber pack roll, adjust the roller pitch to 5mm, the raw rubber continuously from left to right and from right to left to cut inverted more than three times or to the specified time.
Time until, if with - - section continuous molding for 5min, separate two sections for 10~15min, then under the piece of cooling, parked for more than 4h, mixing standby. Conventional roll temperature is about 45°C, plasticity requirement is more than 0.45.
Note: low hardness ( below 50 ° ) rubber raw rubber ( including other rubber ) plasticizing need to be divided into two to three plasticizing, if the two plasticizing, then two - paragraph plasticizing; if the three plasticizing, then two one and one two plasticizing. Between each section of the rubber needs to be parked for more than 4h cooling, to ensure the plasticity of raw rubber and mixing with the dispersion of the agent. Dispersion.
2) Nitrile rubber: low temperature, small roller distance, low volume of the plasticizing method. The roller distance is 2~3mm, the molding time is 20~30min, and the operation is basically the same as that of natural rubber.
3) Butyl, butyl rubber: no plasticizing before mixing, if special needs are thin through a few times, butyl rubber should pay attention to clean, prevent other rubber mixing, affecting the quality.
4) Suntory: Suntory plasticizing plasticity changes are not big, plasticizing only to facilitate the operation, can be appropriate over the thin pass.
5) neoprene: neoprene should not be a long time plasticizing, it is better to short time, low-temperature plasticizing, roller pitch 5 ~ 6mm over rubber 3 ~ 4 times, small roller pitch thin pass 10 ~ 15min, 5 ~ 6mm Rolling distance is 5~6mm,roll temperature is 40~50℃.
The second section of the plasticizing: a section of plasticizing the raw rubber pack roll, adjust the roller pitch to 5mm, the raw rubber continuously from left to right and from right to left to cut inverted more than three times or to the specified time.
Time until, if with - - section continuous molding for 5min, separate two sections for 10~15min, then under the piece of cooling, parked for more than 4h, mixing standby. Conventional roll temperature is about 45°C, plasticity requirement is more than 0.45.
Note: low hardness ( below 50 ° ) rubber raw rubber ( including other rubber ) plasticizing need to be divided into two to three plasticizing, if the two plasticizing, then two - paragraph plasticizing; if the three plasticizing, then two one and one two plasticizing. Between each section of the rubber needs to be parked for more than 4h cooling, to ensure the plasticity of raw rubber and mixing with the dispersion of the agent. Dispersion.
2) Nitrile rubber: low temperature, small roller distance, low volume of the plasticizing method. The roller distance is 2~3mm, the molding time is 20~30min, and the operation is basically the same as that of natural rubber.
3) Butyl, butyl rubber: no plasticizing before mixing, if special needs are thin through a few times, butyl rubber should pay attention to clean, prevent other rubber mixing, affecting the quality.
4) Suntory: Suntory plasticizing plasticity changes are not big, plasticizing only to facilitate the operation, can be appropriate over the thin pass.
5) neoprene: neoprene should not be a long time plasticizing, it is better to short time, low-temperature plasticizing, roller pitch 5 ~ 6mm over rubber 3 ~ 4 times, small roller pitch thin pass 10 ~ 15min, 5 ~ 6mm Rolling distance is 5~6mm,roll temperature is 40~50℃.
