Slot coating unit, coating head, and coating equipment
A technology of slit coating and coating head, which is applied in the field of coating head, coating equipment and slit coating unit, which can solve the problems of uneven film coating and unstable feed flow rate, etc. uneven coverage effect
Active Publication Date: 2018-04-24
SOUTH CHINA NORMAL UNIVERSITY +2
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a slit coating unit, coating head and coating equipment, which can solve the problem of uneven film coating caused by unstable feed flow rate
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[0025] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the present invention can be combined interactively on the premise of not co...
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The invention provides a slit coating unit, a coating head and a coating device. The slit coating unit includes a shell, in which a feed channel, a discharge channel, a partial pressure channel and a slit nozzle are arranged, and the width of the feed channel decreases step by step along the direction toward the slit nozzle. The coating head includes a plurality of slit coating units as described above arranged side by side. The coating apparatus comprises a slot coating unit or a coating head as described above. The slit coating unit of the present invention divides the fluid by adopting the method of increasing the partial pressure channel between the feed channel and the slit nozzle, and at the same time the feed channel is gradually narrowed, even if the flow rate of the feed fluid at the inlet changes, in the narrow The liquid extrusion speed at the slit nozzle is basically not affected, which can solve the problem of uneven film coating caused by unstable feed flow rate. Both the coating head and the coating equipment of the present invention adopt the above-mentioned slit coating unit, which can solve the problem of uneven film coating caused by unstable feed flow rate.
Description
technical field [0001] The invention relates to the technical field of liquid coating, in particular to a slit coating unit, a coating head and coating equipment. Background technique [0002] Slit coating has become one of the most representative thin film coating methods in the existing thin film coating field, mainly reflected in the photosensitive adhesive coating in the pixel preparation process in the liquid crystal display field. At present, there are two main methods for controlling the film thickness and uniformity of slit coating: the first is to control the amount of extrusion by adding clips in the slit, so as to further control the thickness of the coated film. Thickness, while ensuring the uniformity of the thickness; the second is through the design of the feeding system, try to ensure the stability of the feeding flow rate of the coating head, so as to help better controllability of the extruded material. Both of these methods require the flow rate of the fe...
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IPC IPC(8): B05C5/00B05C11/10
Inventor 金名亮王丹水玲玲周国富
Owner SOUTH CHINA NORMAL UNIVERSITY