Rubber kneader affects the quality of pigments

The rubber kneader is a pair of paddles that work together and rotate to produce a strong shearing effect and make the semi-dry state or rubber-like viscous plastic material can make the material react to obtain a uniform mixing and stirring. The next section will focus on the reasons why rubber kneader affects the quality of pigments.

Here is the catalog：

• What are the usual heat exchange methods of rubber kneaders according to the demand?
• Why does the rubber kneader affect the quality of pigments?

What are the usual heat exchange methods of rubber kneaders according to the demand?

The rubber kneader can be designed as heated or unheated according to the demand, and the heat exchange methods are usually: electric heating, steam heating, circulating thermal oil heating, circulating water cooling, etc. Rubber kneader discharge methods include hydraulic tipping cylinder dumping, ball valve discharge, screw extrusion, etc. Rubber kneader cylinder body and pulp leaves and material contact parts are made of 304 stainless steel, product quality.

Why does the rubber kneader affect the quality of pigments?

1. The shape of the rubber kneader stirring paddle

Σ type is a general-purpose stirring paddle, is currently the main form of domestic rubber kneader. In the production of pigments, foreign countries have developed a special stirring paddle, which is a twisted long rectangle, the above also increased the anti-impact blade, which is characterized by high strength, low kneading noise. After process adjustment, Σ-type paddle applied to the pigment production can also be satisfactory, but the kneading time is longer kneading efficiency is low. This form of paddle its length-diameter ratio, cross-sectional size, the form of the working surface, and the degree of rotation of the pigment kneading effect has a great impact.

2. Stirring paddle center distance and the gap between the stirring paddle and the tank wall

This is a very important factor that affects the quality of pigment. For organic pigment 3-6mm gap is the most suitable, too small and too big is not good. The gap is too small, the material layer on the tank wall is very thin, the internal mixer stirring paddle every rotation week between the stirring paddle and the tank wall by the grinding of less material; the gap is too large, the tank wall is easy to accumulate too thick, paddle rotation due to the buffering effect of the material in the material layer of sheer, grinding strength is not enough, these have affected the effect of kneading. In addition, the gap is too large to cause the material layer on the wall of the tank to be too thick, but also affects the heat transfer effect of the machine.

3. The speed of the two stirring paddles

General rubber kneader two stirring speed is not the same. Paddle speed can not be too fast, too fast need to be equipped with high power, the structural strength of the components required high, the transmission mechanism increases. At the same time, the rotation speed is too fast to cause the material in the kneader to be thrown up, impact, the work consumed on the pigment grinding effect is not very high, the efficiency is not high. Rubber kneader stirring speed can not be too low, otherwise, the kneading time is bound to extend, the daily output of pigment is reduced.

Rubber kneader as indispensable machinery and equipment for the production of pigments, has a direct role in determining the quality of pigments, to have good pigment quality, the choice of quality kneader is a necessary prerequisite.

Qingdao Huicai Machine Manufacture Co., Ltd has strong technical force, accumulate many years of experience in the manufacture of rubber kneaders, and take advantage of the length of the domestic and foreign kneading machine manufacturing, product development, innovation, replacement, technology, and manufacturing process ahead of the development of the current domestic advanced, high technology content of rubber kneader series products, choose us no problem!