阅读说明：本技术 一种喷涂方法、喷涂设备及采用此喷涂方法所得喷涂产品 (Spraying method, spraying equipment and spraying product obtained by adopting spraying method ) 是由 杨照 于 2019-11-19 设计创作，主要内容包括：本发明提供了一种喷涂方法,包括以下步骤：第一步、将待喷涂工件的喷涂区域根据灰阶值大小划分为包含不同喷涂厚度的多个喷涂区间,得到带有不同灰阶值的设计图纸；第二步、采用喷涂设备根据带有不同灰阶值的设计图纸对待喷涂工件的喷涂区域进行喷涂,得到喷涂工件；第三步、对喷涂工件进行后处理,即得喷涂产品。应用本发明的喷涂方法,先将待喷涂工件的喷涂区域采用大小不同的灰阶值与不同喷涂厚度对应设计喷涂区间,再结合喷涂设备进行不同喷涂厚度的喷涂施工,能够精准控制喷涂区域的喷涂厚度,有效解决喷涂产品的橘皮、彩虹纹不良,喷涂产品良率高。(The invention provides a spraying method, which comprises the following steps: firstly, dividing a spraying area of a workpiece to be sprayed into a plurality of spraying intervals containing different spraying thicknesses according to the size of a gray scale value to obtain design drawings with different gray scale values; secondly, spraying a spraying area of the workpiece to be sprayed by adopting spraying equipment according to design drawings with different gray scale values to obtain a sprayed workpiece; and thirdly, carrying out post-treatment on the sprayed workpiece to obtain a sprayed product. By applying the spraying method, the spraying areas of the workpiece to be sprayed are designed with spraying intervals corresponding to different spraying thicknesses by adopting different gray scale values, and then spraying construction with different spraying thicknesses is carried out by combining spraying equipment, so that the spraying thickness of the spraying areas can be accurately controlled, the problems of poor orange peel and rainbow lines of the sprayed product are effectively solved, and the yield of the sprayed product is high.)

1. A method of spraying, comprising the steps of:

firstly, dividing a spraying area of a workpiece to be sprayed into a plurality of spraying intervals containing different spraying thicknesses according to the size of a gray scale value to obtain design drawings with different gray scale values;

secondly, spraying a spraying area of the workpiece to be sprayed by adopting spraying equipment according to design drawings with different gray scale values to obtain a sprayed workpiece; a plurality of spraying intervals with spraying thicknesses decreasing from far to near are arranged from the holes and/or edges on the workpiece to be sprayed;

and thirdly, carrying out post-treatment on the sprayed workpiece to obtain a sprayed product.

2. A spraying method according to claim 1, characterized in that in the first step: setting a plurality of gray scale values from far to near to the holes and/or edges on the workpiece to be sprayed; setting a spraying thickness corresponding to one gray scale value; the width of the single spraying interval in the second step is 0.01-180 mm.

3. The spraying method according to claim 2, characterized in that a spraying area of the workpiece to be sprayed is divided according to the size of the gray scale value by using drawing software; the drawing software adopts CAD software.

4. The spray coating method according to any one of claims 1 to 3, wherein the gray level is adjusted according to the color brightness and the concentration of the three primary colors R/G/B by: the larger the grayscale value, the lower the luminance value, and the lower the corresponding RGB value.

5. The spraying method according to claim 4, wherein the gray scale values are set from small to large as DPD1-DPD7, the film thickness corresponding to the gray scale value DPD1 is 0.3-0.6um, the film thickness corresponding to the gray scale value DPD2 is 0.7-0.9um, the film thickness corresponding to the gray scale value DPD3 is 1.0-1.3um, and the film thickness corresponding to the gray scale value DPD4 is 1.4-1.7 um; the film thickness corresponding to the gray-scale value DPD5 is 1.8-2.1 um; the film thickness corresponding to the gray-scale value DPD6 is 2.2-2.5 um; the film thickness corresponding to the gray-scale DPD7 is 2.6-2.9 um.

6. The spray coating method according to claim 4, wherein the viscosity of the resist used in the second step is 5 to 9 Mpa-s; and the post-treatment in the third step comprises standing, pre-baking, UV exposure and solid baking, wherein the standing time is 2-5min, the pre-baking temperature is 100-130 ℃, the UV exposure energy is 300-700mj, and the solid baking temperature is 170-240 ℃.

7. A spray coating device characterized by: comprises a PLC control system and a spray head connected with the PLC control system; the PLC control system is internally embedded with drawing software, the drawing software is used for dividing a spraying area of a workpiece to be sprayed into a plurality of spraying intervals containing different spraying thicknesses according to the gray scale value, and the PLC control system controls the spray nozzle to spray the spraying area of the workpiece to be sprayed according to design drawings with different gray scale values.

8. A spray product characterized by: prepared by the spray coating method according to any one of claims 1 to 6; the spray product is a glass cover plate.

Technical Field

The invention relates to the technical field of spraying, in particular to a novel spraying method, spraying equipment and a product obtained by adopting the spraying method.

Background

The spray coating is a coating method in which the coating is applied to the surface of an object to be coated by dispersing the coating into uniform and fine droplets by means of a spray gun or a disc atomizer by means of pressure or centrifugal force. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivatives of the above basic spraying forms, such as high flow low pressure atomized spraying, thermal spraying, automatic spraying, multiple spray groups, etc.

In the existing liquid spraying process, a voltage uniform spraying technology is adopted, because a liquid material is a transparent material, the viscosity is 6.1-6.6 Mpa.s, the liquid material is in a liquid state, the liquid material is sprayed on a workpiece and has certain liquid fluidity, and because the main component comprises resin, the resin has a shrinkage phenomenon, the upper surface part can shrink and accumulate to form poor (orange peel and rainbow texture phenomenon) when the liquid surface tension is greater than the leveling force of the liquid after the spraying of the hole edge is finished.

Therefore, it is of great significance to design a spraying method which is convenient to operate and can effectively solve the defects.

Disclosure of Invention

The first purpose of the invention is to provide a spraying method which is convenient to operate and can effectively solve the problems of orange peel and rainbow texture, and the specific technical scheme is as follows:

a method of spray coating comprising the steps of:

firstly, dividing a spraying area of a workpiece to be sprayed into a plurality of spraying intervals containing different spraying thicknesses according to the size of a gray scale value to obtain design drawings with different gray scale values;

secondly, spraying a spraying area of the workpiece to be sprayed by adopting spraying equipment according to design drawings with different gray scale values to obtain a sprayed workpiece; a plurality of spraying intervals with spraying thicknesses decreasing from far to near are arranged from the holes and/or edges on the workpiece to be sprayed;

and thirdly, carrying out post-treatment on the sprayed workpiece to obtain a sprayed product.

Preferably, in the above technical solution, in the first step: setting a plurality of gray scale values from far to near to the holes and/or edges on the workpiece to be sprayed; setting a spraying thickness corresponding to one gray scale value; the width of the single spraying interval in the second step is 0.01-180 mm.

Preferably, in the technical scheme, the spraying area of the workpiece to be sprayed is divided according to the size of the gray scale value by adopting drawing software; the drawing software is drawing software with consistent pixels in all directions; preferably, the drawing software is CAD software.

Preferably, in the above technical solution, the gray level is adjusted according to the color brightness and the R/G/B three primary color density, and the adjustment mode is as follows: the larger the grayscale value, the lower the luminance value, and the lower the corresponding RGB value.

Preferably, the gray scale values are set from small to large to seven of DPD1-DPD7, the film thickness corresponding to the gray scale value DPD1 is 0.3-0.6um, the film thickness corresponding to the gray scale value DPD2 is 0.7-0.9um, the film thickness corresponding to the gray scale value DPD3 is 1.0-1.3um, and the film thickness corresponding to the gray scale value DPD4 is 1.4-1.7 um; the film thickness corresponding to the gray-scale value DPD5 is 1.8-2.1 um; the film thickness corresponding to the gray-scale value DPD6 is 2.2-2.5 um; the film thickness corresponding to the gray-scale DPD7 is 2.6-2.9 um.

Preferably, in the above technical scheme, the photoresist used in the second step is a negative photoresist, the viscosity of which is 5-9Mpa · s; the spraying equipment comprises: the spraying speed is 50-200 mm/s; the liquid supply system is used for pumping and negative pressure circulating liquid supply, and the pressure is between-4 Kpa and-10 Kpa; the spraying mode is voltage spraying. The post-treatment comprises standing, pre-baking UV exposure and curing, wherein the standing time is 2-5min, the pre-baking temperature is 100-130 ℃, the pre-baking time is 2-6min, the UV exposure energy is 700mj, the curing temperature is 170-240 ℃, and the curing time is 2000-4000 min.

By applying the spraying method, the spraying area of the workpiece to be sprayed is divided into a plurality of spraying intervals containing different spraying thicknesses according to the gray scale value, so that design drawings with different gray scale values are obtained; spraying the spraying area of the workpiece to be sprayed by adopting spraying equipment according to the design drawings with different gray scale values to obtain a sprayed workpiece; and finally, carrying out post-treatment on the sprayed workpiece to obtain a sprayed product. According to the method, the spraying areas of the workpiece to be sprayed are designed with the corresponding spraying intervals of different gray scale values and different spraying thicknesses, and then spraying construction with different spraying thicknesses is carried out by combining spraying equipment, so that the spraying thickness of the spraying areas can be accurately controlled, the problems of poor orange peel and rainbow patterns of the sprayed product are effectively solved, and the yield of the sprayed product is high. After the light resistance is selected, the spraying equipment sets the spraying speed and the nozzle voltage, and the fast spraying of the workpiece can be realized by changing the gray scale values of different workpieces to be sprayed, and the process steps and the process parameters are convenient to control; preferably, the viscosity of the photoresist is 5-9 Mpa.s, the viscosity is too high, the fluidity is poor, and the spraying operation is not easy to carry out; the viscosity is too small, the fluidity is strong, and spraying intervals with different spraying thicknesses are not easy to form (the leveling is easy); the standing time is not too short easily, the sprayed layer is unstable, and orange peel and rainbow patterns are easy to form; the standing time is too long, and the whole process period is prolonged; the pre-baking temperature, the UV exposure energy and the curing temperature are reasonable, and the adhesive force and the strength of the sprayed product meet the requirements. The spraying method can be used for spraying glass cover plates (such as a rear cover plate, a front cover plate, a side cover plate and the like), glass panels and other common panels.

The invention also discloses spraying equipment which comprises a PLC control system and a spray head connected with the PLC control system; the PLC control system is internally embedded with drawing software, the drawing software is used for dividing a spraying area of a workpiece to be sprayed into a plurality of spraying intervals with different spraying thicknesses according to the gray scale value, and the PLC control system controls the spray head to spray the spraying area of the workpiece to be sprayed according to the design drawing with different gray scale values. Through drawing software, shower nozzle and PLC control system's combination, can realize accurate control spraying thickness, effectively solve orange peel, rainbow line harmfully.

The invention also discloses a spraying product which is prepared by the spraying method and has high yield.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic drawing of a design paper with different gray scale values in preferred embodiment 1 of the present invention;

FIG. 2 is a schematic representation of the spray product of example 1 under a 3D laser microscope;

FIG. 3 is a schematic view of a spray-coated product under a 3D laser microscope in a comparative example;

wherein, 1, glass cover plate, 2, hole.

Detailed Description

Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.