PVC powder mixing device and PVC powder mixing method

Abstract

The invention discloses a PVC powder mixing device and a PVC powder mixing method. The mixing device comprises a high-speed mixing mechanism, a low-speed cooling mechanism, a discharging mechanism and a first communicating channel which are arranged from top to bottom in a stepped mode, whereinthe first communicating channel communicates thehigh-speed mixing mechanism with the low-speed cooling mechanism. The PVC powder mixing method comprises the following steps of conveying powder into the high-speed mixing mechanism for mixing powder at high speed; conveying the mixed powder rapidly into the low-speed cooling mechanism via a first conveying channel, and releasing air intensity generated by the powder entering the low-speed cooling mechanism instantly through the first communicating channel communicated with the high-speed mixing mechanism; and conveying powder cooled by thelow-speed cooling mechanism to the discharging mechanism via a second conveying channel. According to the invention, the mechanism is simple; the production cost is low; a dedusting device is not required to be arranged additionally; the dedusting effect is good; environment pollution is prevented; the working environment and the air quality are improved.

Description

technical field [0001] The invention relates to the field of PVC powder mixing, in particular to a PVC powder mixing device and method. Background technique [0002] PVC raw materials are cheap, strong and sturdy, with good chemical resistance and a shrinkage rate of 0.2%-0.6%. The products are widely used in electrical appliances, machinery, construction, daily necessities, toys, and packaging. However, the thermal stability of PVC raw materials is poor, the molding temperature is close to the decomposition temperature, the fluidity is not good, and the appearance is easy to form bad defects. Plasticizers increase its fluidity, and additives are generally required to enhance its strength, electrical insulation, chemical resistance, etc. Therefore, PVC powder needs to be heated and mixed for pretreatment. Generally speaking, the PVC powder mixing process produces more dust and the production environment is harsh. In the prior art, the dust content in the air is generally r...

AI Technical Summary

Problems solved by technology

In the prior art, the dust content in the air is generally reduced by adding a dust removal device. The dust removal device is mainly connected to each production link of the mixing device through a pipeline, and the dust is recovered through a fan. However, during the mixing process, the powder is mixed by a high speed. When the material mechanism enters the low-speed cooling mechanism, the pressure increases instantaneously, causing the dust to be unable to be sucked away by the vacuum device in time, causing the powder to easily leak out

In addition, the dust collection device not only has high cost, takes up a lot of space, and consumes a lot of power, but also needs to recycle the dust collected by the dust collection device, causing secondary pollution to the production environment

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