Vacuum defoaming device and foam removal method adopting device

Abstract

The invention discloses a vacuum defoaming device and a foam removal method adopting the device. The device comprises a tank body, a stirring shaft and a control device, wherein the tank body is usedfor containing a liquid material, and the liquid material performs centrifugal motion when the tank body rotates; the stirring shaft is arranged in the tank body and stirs the liquid material when thestirring shaft rotates, so that the liquid material does centrifugal motion; the control device is respectively connected with the tank body and the stirring shaft and is used for controlling the tank body and the stirring shaft to rotate; when the control device controls the stirring shaft and the tank body to alternately rotate, the liquid material has a downward extruding tendency under the self-weight of the liquid material and the centrifugal forces produced by the rotation of the tank body and the stirring shaft, so that a foam existing in the liquid material is extruded and separated from the liquid material.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display panels, in particular to a vacuum defoaming device and a defoaming method using the vacuum defoaming device. Background technique [0002] With the development of the display panel industry, flexible display panels have more market advantages and wider application fields. Bubbles may exist in high-viscosity materials (such as PI polyimide materials, etc.) that are flexible substrates. During the product manufacturing process, if there are air bubbles in the flexible substrate, they will be impacted by high energy during the (Excimer Laser Annealcrystallization, ELA) process, and the air bubbles will expand when heated, and will rupture, burn or collapse, which will cause Defective or scrapped products. Therefore, it is necessary to remove the air bubbles that may exist in the high viscosity material. [0003] At present, defoaming of materials generally adopts adding defoaming ag...

AI Technical Summary

Problems solved by technology

If the chemical method is used, it is necessary to add a defoamer to eliminate the foam formed by the material during the production process, but the defoamer may have adverse reactions to the raw material

Vacuum stirring defoaming is to put certain materials in a closed container, and use a vacuum pump to vacuumize while stirring, but it is difficult to achieve continuous defoaming on-line, and there are problems such as incomplete defoaming of high-viscosity materials

Film degassing is a fully automatic degassing machine rotating at high speed to form a film from the material, supplemented by a vacuum to eliminate the air bubbles, but it has the matching problem of feeding and discharging, and it is difficult to truly realize the degassing effect of the material. continuous

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