Demetdent Dental milling machines were built for reliable, precise and error-free milling. Requiring no machine expertise to operate them, they are simple to set-up and feature a host of automated features. Choose from a range of dry-milling and wet-milling devices and create high-quality bridges, crowns and other restorations. Steel Milling Machine,Cnc Milling Aluminum,Cnc Metal Milling Machine,Mini Metal Milling Machine Shandong Carved Intelligent Technology Group Co.,Ltd , https://www.demetdent.com
Commonly used mixers are divided into four categories: gas and low viscosity liquid mixers, medium and high viscosity liquid and paste mixing machines, thermoplastic material mixers, and powdered and granular solid materials mixing machines.
The mixed mechanical gas and low viscosity liquid mixer is characterized by simple structure and no rotating parts, small maintenance and repair, and low energy consumption. This type of mixing machine is divided into four types: airflow mixing, pipe mixing, jet mixing and forced circulation mixing.
Mixing machines for paste mixing machines, high viscosity liquids and pastes generally have strong shearing action.
Thermoplastic material mixing mechanical thermoplastic material mixing machine is mainly used for mixing thermoplastic materials (such as rubber and plastic) with additives; powdered, granular solid material mixing machinery is mostly intermittent operation, including machinery with mixing and grinding effects, such as Rim machine, etc.
All materials involved in the mixing are required to be evenly distributed during mixing. The degree of mixing is divided into three states: ideal mixing, random mixing, and completely unmixed. The degree of mixing of the various materials in the mixing machine depends on factors such as the proportion of the material to be mixed, the physical state and characteristics, and the type of mixing machine used and the duration of the mixing operation.
The mixing of the liquid mainly relies on a mechanical agitator, a gas stream and a jet of the liquid to be mixed, etc., so that the material to be mixed is agitated to achieve uniform mixing. The agitation causes a portion of the liquid to flow, which in turn pushes the liquid around it, with the result that a circulating liquid flow is formed within the solution, and the resulting diffusion between the liquids is referred to as bulk convection diffusion. When the flow rate of the liquid caused by the agitation is high, shear occurs at the interface between the high-speed liquid stream and the surrounding low-speed liquid stream, thereby generating a large number of local vortices. These vortices rapidly spread around, and more liquid is drawn into the vortex. The turbulent convection diffusion formed in a small range is called eddy diffusion.
The moving parts of the mechanical agitator also shear the liquid when it is rotated. The liquid is also subjected to shearing action when flowing through the wall and various fixing members installed in the container. These shearing actions will cause many Local eddy current diffusion.
For liquids of different density, composition, and incompatibility, the shearing action caused by the agitation and the strong turbulence shred the dense liquid into small droplets and uniformly disperse it into the main liquid. The flow rate of the liquid produced by the agitation must be greater than the settling velocity of the droplets.
The mixing mechanism of a small amount of insoluble powdery solid and liquid in the solid material mixing machine is different from the density component, and the mixing mechanism of the mutually incompatible liquid is the same, except that the stirring cannot change the particle size of the powdery solid. If the solid particles before mixing cannot be made to have a sedimentation rate lower than the flow rate of the liquid, a uniform suspension cannot be formed regardless of the stirring method.
The mixing of different pastes mainly involves repeatedly dividing the materials to be mixed and subjecting them to strong shearing action caused by pressing, squeezing, squeezing, etc., and then repeatedly combining and kneading to achieve the desired degree of mixing. This kind of mixing is difficult to achieve the ideal mix, only to achieve random mixing. The powdery solid is mixed with a small amount of liquid to form a paste, and the mixing mechanism is the same as that of the paste material.
Different thermoplastic materials and the mixing of thermoplastic materials with a small amount of powdery solids need to rely on strong shearing, repeated kneading and kneading to achieve random mixing.
Common mixers are: horizontal pear knife mixer, double ribbon ribbon mixer, double planetary mixer, horizontal gravityless mixer, V-type mixer, double spiral cone mixer, dry powder mixer, planet Power mixers, etc.
Type and introduction of mixer
Changzhou Chuangke Dry Granulation Equipment Co., Ltd. is a key enterprise in China's drying industry, specializing in the production of dryers; granulators; chemical equipment; famous factories of pharmaceutical equipment, the first in the industry to pass ISO9001 international quality system certification, China's drying industry Members, Chinese pharmaceutical equipment members, contract-honoring and trustworthy enterprises. The factory covers an area of ​​more than 20,000 square meters, construction area of ​​more than 10,000 square meters, fixed assets of more than 12 million yuan, strong technical force, CAD design, modern large-scale workshops, in strict accordance with the modern enterprise system management. With an annual output of more than 1,500 sets of drying equipment, granulators, mixers, etc., currently has 28 categories of system drying equipment, more than 280 specifications and varieties, widely used in pharmaceutical, chemical, food and other industries. It is equipped with drying equipment for many major projects and research institutes in the country. Liu Jianwei, the founder of the company, has been committed to the research and development of drying equipment and granulating equipment and business management for nearly ten years. The company attaches importance to technological innovation and always believes that: science and technology are *productivity. Cooperate with relevant domestic research institutes to develop new products, absorb and digest advanced drying and granulating equipment at home and abroad to meet the needs of modern enterprise production. The factory has a complete laboratory, and welcomes overseas customers to take samples and inspect orders. The company's products are well-known in the country for their excellent production, complete range and high technical content. "Chuangke" brand drying equipment has become the preferred brand of many users, and the products sell well in China. We sincerely cooperate with new and old customers at home and abroad to create brilliance in the new century!
Next Article
Eat a good way of diet
Prev Article
The difference between glutinous rice and rice