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Why does the compression molding press leak water?

Jun. 17, 2022
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It is difficult for the rubber press to leak water. The main reason for this is the carbon black, because the carbon black will absorb the moisture in the air, and the mixing temperature of about 100 degrees will generate a large amount of moisture, which will accumulate when the vulcanizer is discharged. The water will be mistaken for the leakage of the internal mixer. The way to eliminate the water vapor is to lift the pressure cover several times during each mixing process to discharge the water vapor, so that there will be no water. vulcanization temperature. If the temperature is 10 °C higher, the curing time will be prolonged by about half. In order to ensure a relatively average vulcanization level, individual thick rubber products are gradually heated and vulcanized at high temperature for a long time. amount of sulfur.


   According to the knowledge of the flat vulcanizing machine, the greater the amount of sulfur, the faster the vulcanization speed, and the higher the vulcanization level that can be achieved. The solubility of sulfur in rubber is limited, and an appropriate amount of sulfur will be precipitated from the surface of the rubber compound, commonly known as "sulfur spray". The amount of sulfur in soft rubber is not more than 3%, the amount in semi-rigid rubber is about 20%, and the amount in hard rubber vulcanization can be as high as 40% or more. Determine the working voltage parameters of the vulcanizer according to the power supply conditions in the operating environment of the vulcanizer. This is relatively simple, usually, as long as the same power level as the vulcanizer is used on site can be selected. When there are different requirements, they should be clearly stated to us. Since there is no power supply facility at the use site of the rubber vacuum press, when a generator car is required to provide power, the working voltage of the rubber hydraulic press must be the same as the voltage provided by the generator car. Sometimes the user's vulcanizer uses a power supply with multiple voltage levels on site. At this time, the one with the largest general range should be selected.


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