Surface coating method for 3D workpieces

A technology for surface coating and workpiece surface, which is applied to the device for coating liquid on the surface, pretreatment surface, coating, etc. It can solve the problems of uneven coating thickness, low production efficiency, etc., to speed up the drying speed, improve the Coating efficiency, the effect of promoting the leveling effect

Inactive Publication Date: 2017-02-22
SHENZHEN KUNQI XINHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of uneven coating thickness and low production efficiency in existing surface coating methods for 3D workpieces, the present invention provides a surface coating method for 3D workpieces, which can effectively ensure the consistency of coating thickness , improve the coating effect and coating efficiency, especially suitable for 3D workpieces with uneven surfaces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for surface coating of a 3D workpiece, comprising the following steps:

[0029] Paint application: apply paint to the surface of the 3D workpiece;

[0030] Paint leveling: Use high-pressure airflow to blow the paint on the surface of the 3D workpiece from multiple directions to form a coating;

[0031] Coating surface drying: Use high-pressure and high-temperature airflow to blow the coating on the surface of the 3D workpiece from multiple directions to make the coating surface dry;

[0032] Coating curing: perform dry film operation on the surface-dried coating to cure the coating.

[0033] In this embodiment, the 3D workpiece refers to a workpiece with a certain three-dimensional structure. The surface of the 3D workpiece that needs to be coated with paint is a non-planar structure, and the present invention does not limit the specific structure of the 3D workpiece. The existing structure, For example, curved screens of mobile phone...

Embodiment 2

[0055] This embodiment discloses a surface coating method for a 3D workpiece, including most of the technical features in Embodiment 1, the difference being:

[0056] In the coating application process, the coating is applied on the surface of the 3D workpiece by dipping, including the following steps: the surface of the 3D workpiece that does not need to be coated with the coating is covered by a mask, and the 3D workpiece is dipped below the liquid level of the coating, so that The coating completely covers the surface of the 3D workpiece, and the immersion time is controlled within 3-240s to ensure that the fluid coating fully wets the surface of the 3D workpiece. The immersion time should be adjusted according to the thickness of the coating required and the properties of the coating used. Take out the workpiece before the surface film is formed to prevent the paint film from adhering to the surface to be coated and affect the quality of the coating film. After dipping, tak...

Embodiment 3

[0058] This embodiment discloses a surface coating method for a 3D workpiece.

[0059] In this embodiment, the curved screen of the mobile phone is used to analyze the implementation effect, which specifically includes the following steps:

[0060] S1: Turn the curved screen upside down and fix it on the conveying device. The conveying device covers the bottom of the curved screen, and the top surface of the curved screen is a concave surface; the UV-curable ink is sprayed out in a curtain shape through multiple nozzles, and the conveying device drives the curved surface The screen passes through the bottom of the nozzle in the horizontal direction, and the UV-curable ink covers the top surface of the curved screen. It should be noted that the top surface of the curved screen is only for this process, and the top surface of the curved screen here refers to It is the surface of the curved screen facing the inside of the mobile phone when it is installed on the mobile phone;

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PUM

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Abstract

In order to overcome the problems, such as uneven coating thickness and low production efficiency, of the existing surface coating method for 3D workpieces, the invention provides a surface coating method for 3D workpieces. The surface coating method comprises the following procedures: applying a paint, to be specific, applying the paint on the surfaces of the 3D workpieces; leveling the paint, to be specific, utilizing high-pressure air flow to blow the paint on the surfaces of the 3D workpieces from a plurality of directions so as to form coatings; drying the surfaces of the coatings, to be specific, utilizing high-pressure and high-temperature air flow to blow the coatings on the surfaces of the 3D workpieces from a plurality of directions and enabling the surfaces of the coatings to be dry; and curing the coatings, to be specific, carrying out film drying operation on the coatings with the dry surfaces and curing and shaping the coatings. The coating method provided by the invention can effectively ensure the thickness consistency of the coatings, improve coating effect and coating efficiency, and is particularly suitable for the 3D workpieces with uneven surfaces.

Description

technical field [0001] The invention belongs to the technical field of workpiece coating, and in particular relates to a method for surface coating of 3D workpieces. Background technique [0002] Surface coating is to form a protective, functional or decorative coating on the surface of the workpiece. The existing coating methods include air spraying, airless spraying, electrostatic spraying, powder spraying, electrophoretic coating, and flow coating. , impregnation, etc., are applicable to different coating objects. In the existing process, when coating the surface of some 3D workpieces with a certain three-dimensional structure, such as the curved screen of a mobile phone, screen printing and spraying are often used, and the screen printing is difficult to adapt to the coating of the concave part of the 3D workpiece. Layer printing makes it difficult to control the quality of the coating, and spraying can easily cause uneven coating thickness, especially for some workpiec...

Claims

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Application Information

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IPC IPC(8): B05D1/02B05D3/00B05D3/04
CPCB05D1/02B05D3/007B05D3/0413
Inventor严永农谌清林严长城
OwnerSHENZHEN KUNQI XINHUA