The full name of the mixer is called "closed rubber mixing machine", which is based on the mixer. In 1820 the creation of mills in the future, so that the rubber industry has a change, but because the mill has many defects, such as high labor intensity, low power, high dust, seriously affecting people's health, so we start considering whether to the processing device with a cover to cover it up, then gradually developed into the mixer. Because it is in the inside of the mixer room, so called closed. Because the operation is open, it is called open rubber mixing machine. All that usually introduces the internal mixer is created by Banbury in 1916, the practice is the first by a Commercial Engineer of German W&P Co. (British) on the basis of the prototype machine plan for the company, because of its rapid development, the output value is widely used, so we always thought that Banbury mixer is the earliest available the.
Since the emergence of the mixer, the mixing process reveals a series of advantages over the mills with, such as the mixing time is short, easy operation, high production efficiency, overcome dust emissions, reduction cooperation agent loss, improve working conditions, reduce labor intensity etc.. Because it is largely carried out by experience, so in the early stages of development have been shown to be low power, can not be used to refine the argument, but has been denied for the production practice. As a result, the mixer is an important effect of the rubber mixing machine, so far it has become a typical equipment in the process of mixing and mixing. According to the calculation of foreign materials, in the rubber industry, 88% of the rubber material is produced by the mixer, plastic, resin industry is also widely used in the mixer. Now - because of the continuous improvement of metal powder, a part of the mixer can also be used to mix.
One of the symbols of modern mixer is high speed, high pressure and high efficiency. The rotor speed of 20rpm is usually referred to as the low-speed mixer, 30 ~ 40rpm is called a medium speed mixer, 60rpm above is called high-speed mixer.
Presents a speed of up to 80rpm or even higher mixer, but also has a wide range of skills and performance and adaptability of the handling of the two speed, three speed, variable speed mixer, but also the rotor speed ratio can be regulated mixer. Its operation time is greatly shortened, from the past slow machine 8 ~ 15min shortened to 1.5 ~ 3.5min, and even some up to 1 ~ 1.5min (including the selection of refining method and make up the mixing process of cooperation skills process, etc.).
The structure of the mixer is also developing. The working process of the mixer and the mechanization and automation level of the whole unit are also progressing, and the program control is selected. In a word, this kind of development is to greatly strengthen the mixing process, improve the efficiency of the machine, reduce manual labor and improve the working environment.
In the intense mixing process, of course, will bring many new problems, therefore, to study mechanical planning, from machine kneading system, cooling system, sealing system, feeding and pressing system, discharging system, transmission system, control system, primary parts, material parameters and resolution skills expected the theory needs to carry out, in order to make the machine function good, for the production process may supply the adaptability and conditioning.
In our country, the development situation of the mixer is: before liberation, it is blank, and the domestic mixer is gradually developed after liberation. The first manufacturer of mixer in our country is a rubber and plastic machine factory in Dalian, which is mainly produced by PC - 2 140/20L mixer, now in 250L, 75/40L mixer. Then Shanghai and other places also gradually produce these machines, such as 250/20/40, 75/30/60, 75/35/70, and 50L mixer. Near - to imitate F series mixer production F080, F160, F270, have been exported. In addition to the Japanese production of flip 50L, 70L mixer. Yiyang rubber machine factory and the introduction of GK series of skills from Germany to produce GK series mixer. F series, GK series is the world's two leading series mixer. Domestic rubber manufacturers have introduced. Division I has been studying the mixer, pin rotor, pin mixing chamber mixer, etc..