First, the causation and treatment of the mixing glue

1. Improper coordination
Such as curing agent, accelerator dosage is too much;

2. Improper operation of rubber mixing
Such as mixing machine temperature is too high, the cooling device is not good, or premature addition of sulfur, or uneven dispersion caused by curing agent and accelerator local high concentration, or without heat dissipation on the early roll, or roll is too large, or not enough cooling after the next piece;

3. Improper parking
Including the glue parking too long, the temperature of the parking place is too high, or the air is not circulating, or the hot smelting sheet piled up for too long.

Two, to prevent burning

The scorch of mixer is more common at the beginning of the plum rain season. Because of the Mooney viscometer and vulcanization instrument, whether it is new mixing or mixing compound can be measured at any time, so as to prevent the coke of the compound. In the mass production of rubber mixing machine factory, there is no need to carry out a comprehensive measurement, only for the specified to pay attention to the rubber can be used a method of measurement.

Three. Methods to prevent burning

First of all, to reduce the amount of vulcanization accelerator, but this will lead to the physical properties of rubber products decreased, it is very important to understand this, vulcanization accelerator is rarely used alone, most of the two, three kinds of accelerator and the way. Once there is a problem with the coordination, it can not prevent the glue from burning. Generally speaking, the main accelerator used for general rubber is the exposure pill or secondary sulfonylamine accelerator. The main promoter DM is a universal promoter. Accelerant M has high coke, secondary sulfonylamine accelerant although it has coke resistance, but because of the slow starting speed of vulcanization, so it should be selected according to the requirements of the use of rubber.

10 to 20 mass portions of recycled rubber are added to general rubber, and the compound is made after blending, which has the function of preventing coke. In addition, we should consider the design of additive formula for the blend, and make some necessary corrections on the basis of studying the scorch property and the physical properties of vulcanized rubber. In the compound of white carbon black, diethylene glycol, polyethylene glycol, organic amine to promote SL and so on.