Automatic sealant applicator

Abstract

The invention relates to an automatic sealant coating device. The automatic sealant coating device comprises a sealant coating unit, a first control unit, a second control unit, a third control unit and a distance sensing and measuring device, wherein the first control unit is connected with the sealant coating unit; the second control unit is directly or indirectly connected to the sealant coating unit; the sealant coating unit comprises a sealant tank and a sealant jar; the lower end of the sealant jar is communicated with the sealant tank through a delivery pipe; a sealant pipe is arranged at the lower part of a buffer tank; the upper end of the sealant pipe is fixedly communicated with the buffer tank through a communicating pipe. The automatic sealant coating device disclosed by the invention can conveniently control the nozzle to move to a proper position, controls the height of the nozzle according to the distance from the nozzle to a glass substrate, and improves the accuracy and the uniformity for coating the sealant. In the automatic sealant coating device, a timer can be used to set the coating cycle and the coating frequency, so that the device is very convenient to control, stable in feeding for coating, uniform, and good in the effect.

Description

technical field [0001] The invention belongs to the technical field of flat panel display manufacturing, and in particular relates to an automatic sealant coating device. Background technique [0002] In the manufacturing process of liquid crystal displays, after the glass substrate is cleaned, sealant coating is required. The purpose is to bond and fix the upper and lower glass substrates, prevent liquid crystal from flowing out, and prevent moisture and debris from entering. liquid crystal layer. In the existing liquid crystal display manufacturing technology, the screen printing technology is generally used to realize the sealant coating, such as figure 1 As shown, in the screen printing process, the scraper 11 generates pressure to act on the screen 12, and the screen 12 must be in contact with the PI (Polyimide, polyimide) guide layer 14 on the glass substrate 13 to apply the sealant . Through the research on the prior art, the inventor found that: if the process is ...

AI Technical Summary

Problems solved by technology

Through the research on the prior art, the inventor found that: if the process is unreasonable or affected by other fluctuations, when the force between the screen and the PI guide layer reaches a certain level, the screen will crush the PI guide layer, Defects of poor screen printing are generated, and once the defects are formed, it will affect the quality of the liquid crystal display, and even cause most of the defective products to be directly scrapped, and at present, the movement of the glue applicator of the glue applicator is driven by the glue applicator shaft , the gluing is completed every one rotation, and after the rubber roller has been used for a period of time, its wear degree is inconsistent, resulting in uneven thickness of the gluing layer, which seriously affects the quality of gluing

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