Silicon carbide micro-powder mixed material screening device

Abstract

The invention discloses a silicon carbide micro-powder mixed material screening device comprising a left base, a right base, a driving motor, a deceleration device and screening cylinders. Two left supporting seats are symmetrically arranged on the left base; two right supporting seats are symmetrically arranged on the right base; two rotating shafts are supported between the two left supporting seats and the two right supporting seats; the screening cylinders comprise the first-stage screening cylinder and the second-stage screening cylinder which are mounted on the two rotating shafts correspondingly; the ends of the two rotating shafts are connected with first elliptical gears; two output shafts are arranged on the deceleration device and connected with two second elliptical gears correspondingly; and the first elliptical gears and the second elliptical gears are matched to form a non-circular transmission mechanism. By additionally arranging the non-circular transmission mechanismin a transmission system of a traditional cylindrical screening device, the screening cylinders of the mixed material screening device continuously and periodically rotate at the variable speed, and thus the phenomena of sieve pasting and plugging of silicon carbide micro-powder are avoided; and meanwhile, the two stages of screening cylinders are arranged, and the mixed material screening accuracy and efficiency are improved.

Description

Technical field [0001] The invention relates to a device for adjusting silicon carbide powder, in particular to a device for mixing and screening silicon carbide powder. Background technique [0002] Silicon carbide powder is an important material for making solar silicon wafers, semiconductor silicon wafers, engineering ceramics, heating elements, advanced refractory materials and other products. With the vigorous development of new material science, the quality requirements for silicon carbide powder are getting higher and higher. After the silicon carbide powder is processed, in order to meet certain size distribution characteristics and adjust the level, it is often necessary to mix and screen the dried silicon carbide powder, divide it into powders of different specifications, and then put them into the finished product packaging bag sell. [0003] There are many types of existing silicon carbide powder mixing and screening devices. Among them, the cylindrical screening devic...

AI Technical Summary

Problems solved by technology

This cylindrical screening device for silicon carbide micropowder mixing has the following disadvantages: First, due to the limitation of the critical speed, the cylinder of the screening device can only rotate at a very slow speed, and the utilization rate of the screen surface is low. The surface is only 1 / 6 to 1 / 8 of the entire screen surface, and the screening efficiency is low. Its screening efficiency is limited within a limit range and cannot be further improved; The sieve is different, there is no vibration and variable speed on the sieve surface, the automatic cleaning effect of the sieve surface is poor, and it is easy to cause the silicon carbide powder to stick to the sieve and block the sieve

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