Variable frequency low speed mixer and method for mixing materials with different stacking densities

Abstract

The invention provides a variable frequency low speed mixer and a method for mixing materials with different stacking densities. The mixer comprises a main mixing chamber and an auxiliary mixing chamber, wherein the auxiliary mixing chamber is arranged in the main mixing chamber; a material mixing cover of the main mixing chamber is provided with a granular material feed port; the bottom of the main mixing chamber is provided with an impeller mechanism; the top of the auxiliary mixing chamber is provided with a powdery material feed port and a liquid material feed port; the wall of the auxiliary mixing chamber is provided with a liquid material discharge port and a plurality of powdery material discharge ports; the top of the auxiliary mixing chamber is provided with a liquid material temporary storage chamber which is communicated with the liquid material feed port and the liquid material discharge port; and by the method, the granular material or preliminarily mixed material is threw up by using the main mixing chamber and the powdery material or the liquid material is scattered in the main mixing chamber by using the auxiliary mixing chamber, so various materials with large stacking density difference are mixed uniformly. The mixer and the method can effectively prevent the phenomenon of non-uniform mixing of the materials, realize premixing with good effect and reduce the probability of demixing of the granular material and the powdery material while greatly shortening the mixing time.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a variable-frequency low-speed mixer and a method for mixing materials with different bulk densities. Background technique [0002] High-speed mixer is a very widely used plastic mixing equipment, which can be used for color mixing, preparation of masterbatch, batching and premixing of blended materials. The commonly used high-speed mixer is composed of mixing chamber, impeller, baffle, mixing cover, discharge device and transmission device. When the high-speed mixer is working, the high-speed rotating impeller makes the material move tangentially along the impeller with the help of the friction between its surface and the material and the thrust of the side to the material. At the same time, due to the action of centrifugal force, the material is thrown to the inner wall of the mixing chamber and rises along the wall. When it rises to a certain height, it falls back ...

AI Technical Summary

Problems solved by technology

Since the high-speed mixer must throw the material up when mixing materials, and then fall by gravity, this results in the use of a high-speed mixer to mix materials with a large difference in bulk density (such as pellets and powder, pellets and liquid materials, etc.) It is easy to cause uneven mixing, especially in the modified plastics industry. If the raw materials are pre-mixed with plastic particles and filler powder, uneven mixing is more likely to occur, and uneven pre-mixing of raw materials is likely to cause production according to the formula. The performance of the product is unstable, resulting in problems such as low yield of the product

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