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Low-temperature electrostatic powder spraying method

An electrostatic powder, low temperature technology, applied in the direction of coating, liquid coating device on the surface, surface pretreatment, etc., can solve the problem of poor conductivity of wood, high temperature resistance, electrostatic powder spraying method can not be applied to the production and processing of wooden workpieces, etc. problems, to achieve the effect of increasing water content, enhancing strength, and facilitating adsorption

Inactive Publication Date: 2020-09-25
北京傲威环亚家具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the poor electrical conductivity and high temperature resistance of wood, the traditional electrostatic powder spraying method cannot be applied to the production and processing of wooden workpieces.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of low-temperature electrostatic powder spraying method that the present invention proposes, comprises the following steps:

[0028] S1, the first pretreatment: remove the ash layer, oil stain and other dirt on the surface of the wooden workpiece, and form a "phosphating layer" on the surface of the wooden workpiece that is corrosion-resistant and can increase the adhesion of the spray coating;

[0029] S2, the second pretreatment: place the wooden workpiece after the first pretreatment in a low-temperature environment, and freeze it; the freezing temperature is -5°--10°, and the freezing time is 2h-10h;

[0030] S3, preparation of low-temperature electrostatic powder, standby;

[0031] S4, hang the wooden workpiece after S2 treatment in the spraying room; the temperature in the spraying room is 20°-25°, and the humidity is 60%-70%;

[0032] S5, evenly spraying the low-temperature electrostatic powder prepared in S3 on the surface of the wooden workpiece;

[00...

Embodiment 2

[0041] A kind of low-temperature electrostatic powder spraying method that the present invention proposes, comprises the following steps:

[0042] S1, the first pretreatment: remove the ash layer, oil stain and other dirt on the surface of the wooden workpiece, and form a "phosphating layer" on the surface of the wooden workpiece that is corrosion-resistant and can increase the adhesion of the spray coating;

[0043] S2, the second pretreatment: place the wooden workpiece after the first pretreatment in a low-temperature environment, and freeze it; the freezing temperature is -5°--10°, and the freezing time is 2h-10h;

[0044] S3, preparation of low-temperature electrostatic powder, standby;

[0045] S4, hang the wooden workpiece after S2 treatment in the spraying room; the temperature in the spraying room is 20°-25°, and the humidity is 60%-70%;

[0046] S5, evenly spraying the low-temperature electrostatic powder prepared in S3 on the surface of the wooden workpiece;

[00...

Embodiment 3

[0055] A kind of low-temperature electrostatic powder spraying method that the present invention proposes, comprises the following steps:

[0056] S1, the first pretreatment: remove the ash layer, oil stain and other dirt on the surface of the wooden workpiece, and form a "phosphating layer" on the surface of the wooden workpiece that is corrosion-resistant and can increase the adhesion of the spray coating;

[0057] S2, the second pretreatment: place the wooden workpiece after the first pretreatment in a low-temperature environment, and freeze it; the freezing temperature is -5°--10°, and the freezing time is 2h-10h;

[0058] S3, preparation of low-temperature electrostatic powder, standby;

[0059] S4, hang the wooden workpiece after S2 treatment in the spraying room; the temperature in the spraying room is 20°-25°, and the humidity is 60%-70%;

[0060] S5, evenly spraying the low-temperature electrostatic powder prepared in S3 on the surface of the wooden workpiece;

[0061...

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Abstract

The invention discloses a low-temperature electrostatic powder spraying method. The low-temperature electrostatic powder spraying method comprises the steps of first pretreatment, second treatment, electrostatic spraying and heating curing. According to the invention, by performing low-temperature treatment on a wooden workpiece, on the one hand, the moisture content of the workpiece is increased,and on the other hand, the strength of the workpiece is enhanced; after the frozen wooden workpiece enters a normal temperature environment, the surface can form mist, and then the wooden workpiece changes from an insulator to a conductor, which facilitates subsequent adsorption of electrostatic powders; and in addition, the formulated low-temperature electrostatic powder can be melted into a film without excessively high temperature, which avoids long-time processing of wood at high temperature and damage to the workpiece.

Description

technical field [0001] The invention relates to the field of electrostatic powder spraying, in particular to a low-temperature electrostatic powder spraying method. Background technique [0002] Electrostatic spraying refers to the coating method that uses the principle of corona discharge to make the atomized paint negatively charged under the action of a high-voltage direct current electric field, and adsorbed on the surface of the positively charged substrate to discharge. Electrostatic spraying equipment consists of a spray gun, a spray cup, and a high-voltage power supply for electrostatic spraying. The scope of application is expanding day by day, from large railway passenger cars, automobiles, tractors, to small workpieces, toys and household appliances and other industries, electrostatic spraying technology can be used. [0003] Due to the poor conductivity and high temperature resistance of wood, the traditional electrostatic powder spraying method cannot be applie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/06B05D5/00B05D3/04B05D3/00B05D1/06B05D3/02
CPCB05D1/06B05D3/002B05D3/0254B05D3/0426B05D5/00B05D7/06
Inventor 潘跃凌潘朝起安然
Owner 北京傲威环亚家具有限公司