Production process of electrostatic coating on wooden doors

Abstract

Disclosed in the present invention is a production process for electro-statically coating a wood door, which comprises the following steps: loading material, removing dust, humidifying, spraying, leveling and preheating, solidifying, and unloading material. The process is characterized in that, in the step of removing dust, a conveying chain is used for conveying a workpiece into a sealed dust-removing chamber, a rotating brush is used for removing dust from the two sides of the workpiece, and an air drafting cover is used for absorbing and collecting the dust swept from the workpiece into a dust collecting box which is filled with water; in the step of spraying, an electro-static spraying mode is adopted for spraying a polyurethane ultraviolet light solidifying coating on the workpiece. The spraying mode can be used for promoting the use ratio of the coating, reducing the VOC emission, and obtaining a more uniformly coated layer.

Description

technical field [0001] The invention relates to a wood production process, in particular to a wooden door coating production process. Background technique [0002] The traditional wooden door spraying method is mainly to use the air spray gun to paint. Due to the high air pressure of the air spraying method, the paint on the surface of the workpiece rebounds seriously, resulting in a low paint rate and uneven coating, which cannot effectively cover the corners of the wooden door leaf. When using air automatic spraying, the workload of re-spraying is heavy, especially for wooden doors, which require thicker paint film coatings, which require multiple sprays, low production efficiency, high operating costs, large paint waste, serious VOC pollution in the coating environment, and wooden doors. The staff density is high and the workload is high. [0003] In addition, the paint used in the traditional wooden door spraying method is PU paint, which has the following disadvantage...

AI Technical Summary

Problems solved by technology

Due to the high air pressure of the air spraying method, the paint on the surface of the workpiece rebounds seriously, resulting in a low paint rate and uneven coating, which cannot effectively cover the corners of the wooden door leaf.

When using air automatic spraying, the workload of re-spraying is heavy, especially for wooden doors, which require thicker paint film coatings, which require multiple sprays, low production efficiency, high operating costs, large paint waste, serious VOC pollution in the coating environment, and wooden doors. High staff density and high workload

[0003] In addition, the paint used in the traditional wooden door spraying method is PU paint, which has the following disadvantages: there are many VOC organic compounds produced, and the solid content is low, generally between 45-50%; the curing time is long, generally 4 to 8 Hour

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