Production system capable of increasing coating layer thickness by pre-wetting surface and coating method

A technology of coating thickness and production system, which is applied to the device and coating of the surface coating liquid, and can solve the problems of coating accumulation, fluidity decline, eddy current formation, etc.

Active Publication Date: 2020-10-30
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after increasing the density of the coating, the viscosity of the coating increases, the fluidity decreases, and the surface tension increases, so that the "solid-liquid" contact angle with the solid surface of the product becomes smaller
In such a high-density situation, it is difficult to smoothly "wet" the complex three-dimensional product surface, which causes problems such as premature flow stop and eddy current formation in the flow, which are manifested as "wrinkles" and "tear marks" in the coating macroscopically. , paint "accumulation" and other problems
Therefore, in the original technology, high film thickness and flat three-dimensional product coating are an irreconcilable contradiction

Method used

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  • Production system capable of increasing coating layer thickness by pre-wetting surface and coating method
  • Production system capable of increasing coating layer thickness by pre-wetting surface and coating method
  • Production system capable of increasing coating layer thickness by pre-wetting surface and coating method

Examples

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Effect test

Embodiment 1

[0030] like figure 1 As shown, a production system for increasing coating thickness through surface prewetting includes a loading room for placing coated products on a conveyor belt, a first coating area, a first drip drying area, a second coating area, The second drip dry area, curing area; the above-mentioned areas are sequentially connected by a conveyor belt; the first coating machine and the second coating machine are respectively arranged in the first coating area and the second coating area; the first dripping The dry zone and the second drip dry zone are used for dripping and leveling of the coated product; the curing zone can completely dry the coating on the coated product; the coating product conveyor belt is set in the feeding room.

[0031] In this example, if figure 1 As shown, the curing area includes a heat drying room, an ultraviolet light curing area, and a product cooling area, which are sequentially connected by a conveyor belt, and the heat drying room is...

Embodiment 2

[0038] A kind of coating method that improves coating thickness by surface prewetting, comprises the steps:

[0039] A. Use a density of 0.850g / cm in the first coating area c 3 , in which 30% of photocurable resin and 70% of isopropanol are used to pre-wet the coated products;

[0040] B. Place the coated product that is pre-wet coated in step A in the first drip-drying area d to drip-dry and level the pre-wet coating. The drip-drying and leveling time is 5 minutes, and the temperature in the drip-drying area is set The temperature is 22°C, and the humidity is set to 40% RH to form a uniform and flat pre-wet coating;

[0041] C. In the second coating area e, the coating product obtained in step B has a use density of 0.890g / cm 3 , in which 45% photocurable resin and 55% isopropanol are used for high-thickness coating on the pre-wet coating;

[0042] D. Place the coated product with high-density coating in step C in the second drip-drying zone f to drip-dry and level the hig...

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Abstract

The invention relates to the field of surface coating layer and coating, and discloses a production system capable of increasing coating layer thickness by pre-wetting a surface. The production systemcapable of increasing coating layer thickness by pre-wetting the surface comprises a feeding room used for placing to-be-coated products on a conveying belt, a first coating area, a first drip dryingarea, a second coating area, a second drip drying area, and a solidifying area. The areas above are connected by the conveying belt in order. The first coating area and the second coating area are respectively provided with a first coating machine and a second coating machine. The first drip drying area and the second drip drying area are used for the drip drying and levelling of the to-be-coatedproducts. The solidifying area enables coating layers on the to-be-coated products to dry completely. The feeding room is internally provided with the conveying belt for conveying the to-be-coating products. The production system capable of increasing coating layer thickness by pre-wetting the surface and a coating method can form the coating layers of uniform high thickness and smooth surface without folds on the surface of complex three-dimensional products.

Description

technical field [0001] The invention relates to the field of surface coating coating, more specifically, to a production system and coating method for increasing coating thickness through surface prewetting. Background technique [0002] Curtain coating technology is a surface treatment industrial technology that forms a coating on the surface of a product through curtain coating equipment. Compared with other coating industrial technologies, it has the advantages of high-speed production, efficient use of paint, relatively low cost, less paint waste, and surface cleaning function, especially for some products with low surface complexity and low thickness requirements Coating is often done using this technique. However, since the curtain coating technology is a separate coating, the paint is in a free fall state before it touches the product, and it only flows under the control of gravity after falling on the product surface, so it is often required to use a lower density p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C9/14B05C11/00B05C11/10B05D1/38
CPCB05C9/14B05C11/1036B05C11/1039B05C11/00B05D1/38
Inventor 詹杰民林凯苏炜李熠华罗莹莹路天栋胡文清
Owner SUN YAT SEN UNIV
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