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Development of sand mill |
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| Announcer:Jiangyin Yongwei Machinery Co., Ltd Release time:2017-01-04 15:37:38 Hits:366 Close |
| 1 Overview The sand mill belongs to the wet ultrafine grinding equipment. Widely used in the production process of ink pigment dispersion and grinding. There are different types of sand mill: * can be divided into static and dynamic separation sand mill according to the medium separation mode Production of different types of ink, the use of sand mill structure is also different. Follow the following rules: * the general use of gravure printing ink production pin (5-50 L) or disc sander (10-100 L). * rotary offset ink generally use vertical rod type (5-130 L) or horizontal agitator mill (60-500 L), and the high viscosity sheetfed ink production often use tapered sand mill with high energy density or three roller machine. * (ink printing ink and paint solvent) generally use the pin high energy density type (horizontal or vertical) and centrifugal turbine rotor (patent products). 2 the development history of sand mill Sand mill is developed on the basis of ball mill, a lot of domestic users still will sand mill is called ball mill! In foreign countries, it is called stirred ball mill (stirring shaft + ball mill). What are the essential differences between the three kinds of ball mill, stirred mill and sand mill! From the principle of fragmentation to understand, the three common ground is the use of grinding media collision, extrusion, friction and other principles of broken materials. Therefore, the three can be classified into the media mill family! The three points can be described in the following table. In a word, the development of the sand mill has gone through the following stages (Figure 1): Confucianism 1.jpg
The second stage: to vertical disc sander (disc + top screen separator) The third stage: vertical rod sand mill (stick type + top slot separator) The fourth stage: horizontal disc sander (disc + dynamic rotor centrifugal separator) The fifth stage: horizontal pin rod cycle sand mill (rod type + super filter area separator) 3 Summary * ball mill is not the same as the grinding machine, whether it is grinding principle, grinding fineness and application fields. The vertical stirred mill, after all, with the help of the earth's gravity and has an independent energy input, can be considered a technical revolution grinding equipment! * because of the low speed and large size of the medium, the stirring mill has a large change in the radial velocity gradient along the pin, so the grinding efficiency is low and the product size distribution is wide. Therefore, the mixer is gradually being squeezed out of the market by the sand mill, which is only used for hard alloy, ferrite grinding or pre grinding. * the sand mill can be divided into vertical and horizontal according to the original grinding type. The structure parameters and operation parameters of sand mill 3 aid sand mill is the first function of material grinding, and the grinding medium separation material second. The structural parameters are determined by the manufacturer (which is determined by the manufacturer) and the operating parameters are determined by the operator in the actual production. The material selection of sand mill is very important to the quality of the products. (1) the structural parameters of sand mill A: grinding original structure type: disc / pin rod / bump type B: cylinder arrangement: horizontal / vertical C: media separator type: static / dynamic D: shaft seal: lip seal / mechanical seal E: Material: stainless steel tube and disc / centrifugal casting steel / ceramic / polymer materials (PU) |
