The homogeneity of the rubber mixture is achieved by mixing it. After finishing the preparation of the mixture, it is removed in the form of a sheet with a thickness of 3-5 mm, put on the desktop and measures its temperature with a needle thermocouple. The rollers shut off and close the valves. A sample is cut from the mixture sheet for analysis, and then the sheet and sample are labelled with a wax pencil. They indicate the date of mixing, the cypher of the mixture, and the mode of mixing.
After marking the mixture is cooled in a bath and placed on a rack. The use of taical masterbatches, pastes and compositions in rubber mixtures does not fundamentally change the order of mixing. The masterbatch is developed at the beginning of the process at a minimum gap, then the gap is increased, and ingredients are introduced into it. Pastes and compositions are administered in the same sequence as the ingredients, which are their main part.
- However, in this case, one can use the same principles of construction of mixing modes, only by increasing the duration of the mixing cycle in proportion to the reduction of the rotor speed. In some factories, vulcanising agents are not introduced as masterbatches but are added in the second mixing stage on a roll mill. There are some arguments in favour of such a regime, but provides additional considerations confirming the feasibility of using masterbatches with accelerators.
- Economic calculations showed that the