Character coating method for part with lettering on paint spraying surface and cleaning solution formula

Abstract

The invention belongs to the technical field of electronic product printing, and particularly relates to a character coating method for a part with a character carved on a paint spraying surface and a cleaning solution. The character coating method comprises the following steps that a character coating tool is used for dipping nitrolacquer to conduct blade coating on the interior of a character groove, then degreased cotton is used for dipping a paint-surface-friendly rapid cleaning solution to conduct a looping type erasing action on a character carving surface, and redundant paint on the periphery of the interior of the character groove is removed. The character coating tool is a tool which is made of a rubber cushion, wood, soft metal or a composite material and is used for blade coating. The paint-surface-friendly rapid cleaning solution comprises an X-1 nitrolacquer diluent, gasoline and absolute ethyl alcohol. The method and the operation process are simple, the construction efficiency is high, the character is full after being coated, a coating in a character groove forms a complete protection embodiment, the corrosion resistance of the character carving position in long-term use is guaranteed, and the delivery progress is accelerated. The paint-surface-friendly cleaning solution is high in cleaning efficiency and small in paint surface damage, and the production cost is indirectly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic product printing, and specifically relates to a method for painting characters on a painted surface engraved part and a formula for a cleaning solution. Background Art

[0002] There are many connectors and buttons installed on the outer surface of electronic products. In order to facilitate user use and manufacturer maintenance, labels, missing fonts or engraved fonts are usually used on the outer surface to mark the connectors and buttons. In the case of harsh operating environment, labels and missing fonts are easy to fall off, and engraved fonts refer to the use of laser engraving machines or computer engraving machines to carve deep font grooves (to ensure the permanence of the logo, the depth of the engraving will be embedded in the metal substrate, but this method destroys the protective properties of the coating) and then paint the logo. The durability is better, but the integrity of the coating is destroyed during the engraving process, which reduces the environmental adaptability of the coating. In order to avoid damage to the coating during the long-term use of electronic products, it is necessary to fill the engraving position with paint to ensure that the coating has complete protective properties after engraving, so as to meet the protective properties of the product for long-term use and increase recognition.

[0003] The grooves of the logo fonts (usually Chinese characters, letters, numbers, lines, symbols, etc.) are filled with nitrocellulose lacquer. The traditional method is to use a syringe to inject nitrocellulose lacquer into the gap, or to trace with a brush. The excess nitrocellulose lacquer inside and outside the font grooves is removed by wiping with cotton wool dipped in nitrocellulose lacquer thinner (X-1) on the engraved surface in a circular motion.

[0004] The traditional method of painting characters has low construction efficiency and is difficult to operate. When using nitro lacquer thinner (X-1) to clean the excess nitro lacquer inside and outside the font grooves, since nitro lacquer thinner (X-1) is an inherent thinner for nitro lacquer and has a strong solubility in nitro lacquer, it is very easy to dilute and remove the paint in the font groove while removing the excess nitro lacquer outside the font, resulting in incomplete paint in the font groove and reduced protective performance of the coating at the engraving site. In order to ensure that the paint in the font groove is full, it is necessary to carefully remove the excess paint around the font during the painting process, resulting in a serious reduction in the painting efficiency. Generally, it takes many times to ensure the fullness of the paint in the font groove. This takes a long time to paint, which can easily damage the surrounding paint surface, reduce the gloss of the paint surface, and thus reduce the overall protective performance of the coating, seriously affecting product delivery. Summary of the invention

[0005] The purpose of the invention is to solve the problems of low process efficiency and great difficulty in operation when cleaning painted and engraved parts, and to provide a method for painting painted and engraved parts, which can quickly fill the groove of the logo font, effectively ensure the fullness of the coating in the font groove, and meet the protective performance of the product for long-term use.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] A method for painting characters on a painted surface engraved part, comprising the following steps:

[0008] Use a painting tool dipped in nitrocellulose lacquer to scrape the inside of the font groove, then use absorbent cotton dipped in a paint-friendly cleaning solution to wipe the engraved surface in a circular motion to remove excess paint outside the font groove, so that the coating inside the groove forms a complete protective embodiment, ensuring the corrosion resistance of the engraved position during long-term use.

[0009] Preferably, the writing tool is a tool for scraping made of a rubber pad, wood, soft metal or composite material; further preferably, the writing tool is a tool for scraping made of a rubber pad.

[0010] Preferably, the size of the writing tool is: 10mm to 50mm in length, 1mm to 50mm in width, and 10mm to 1000mm in height.

[0011] Preferably, the paint-friendly quick cleaning solution includes nitrolacquer thinner (X-1), gasoline, and anhydrous ethanol, and the volume ratio of the three is 4-25:1-25:50-95; for example, it can be 4:1:95, 10:1:89, 15:1:84, 20:1:79, 25:1:74, 4:5:91, 4:10:86, 4:15:81, 4:20:76, ​​4:25:71, etc.

[0012] Further preferably, the dimensions of the rubber pad are: 10 mm in length, 5 mm in width, and 50 mm in height.

[0013] Another object of the present invention is to provide a paint-friendly cleaning solution, which can solve the destructiveness of the nitro lacquer thinner (X-1) in the prior art to the inner coating and paint surface of the font groove, achieve rapid cleaning of excess nitro lacquer outside the font groove, and at the same time form a complete protective system for the inner coating of the font groove to ensure the corrosion resistance of the engraving position during long-term use.

[0014] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4-25:1-25:50-95.

[0015] Preferably, the paint-friendly cleaning solution is used for painting lettering on painted parts.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (I) The method for painting characters on a painted surface lettering part of the present invention has a simple operation process and high construction efficiency. The characters are full after painting, so that the coating inside the character groove forms a complete protective embodiment, ensuring the corrosion resistance of the lettering position in long-term use and improving the delivery progress.

[0018] (ii) The paint surface-friendly cleaning solution of the present invention has high cleaning efficiency and little damage to the paint surface, thereby indirectly reducing production costs. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0021] When describing some embodiments, the expression "A and / or B" may be used. It is easy to understand that "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0022] When describing some embodiments, the expressions "at least one of A, B and C" and "at least one of A, B or C" may be used, both of which have the same meaning and include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0023] The experimental methods in the following examples are conventional methods unless otherwise specified, and the experimental materials used in the following examples are commercially available unless otherwise specified.

[0024] Embodiment 1:

[0025] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:1:95.

[0026] The preparation method is as follows: weigh nitro lacquer thinner (X-1), gasoline and anhydrous ethanol in proportion and then directly mix them evenly.

[0027] Embodiment 2:

[0028] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 10:1:89.

[0029] The preparation method is as follows: weigh nitro lacquer thinner (X-1), gasoline and anhydrous ethanol in proportion and then directly mix them evenly.

[0030] Embodiment 3:

[0031] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 15:1:84.

[0032] Embodiment 4:

[0033] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 20:1:79.

[0034] Embodiment 5:

[0035] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 25:1:74.

[0036] Embodiment 6:

[0037] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:5:91.

[0038] Embodiment 7:

[0039] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:10:86.

[0040] Embodiment 8:

[0041] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:15:81.

[0042] Embodiment 9:

[0043] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:20:76.

[0044] Embodiment 10:

[0045] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 4:25:71.

[0046] Example 11: A paint-friendly cleaning solution, comprising nitro lacquer thinner (X-1), gasoline, and anhydrous ethanol, wherein the volume ratio of the three is 10:5:85.

[0047] Embodiment 12:

[0048] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 10:10:80.

[0049] Embodiment 13:

[0050] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 10:15:75.

[0051] Embodiment 14:

[0052] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 10:20:70.

[0053] Embodiment 15:

[0054] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 10:25:65.

[0055] Embodiment 16:

[0056] A paint-friendly cleaning solution includes nitro lacquer thinner (X-1), gasoline, and anhydrous ethanol, wherein the volume ratio of the three is 50:50:0. In this case, due to the absence of ethanol as a regulator, excessive dissolution will occur during the painting process, resulting in the painted words being not full and the font being unclear.

[0057] Embodiment 17:

[0058] A paint-friendly cleaning solution includes nitro lacquer thinner (X-1), gasoline, and anhydrous ethanol, and the volume ratio of the three is 50:0:50. In this case, due to the absence of gasoline as a regulator, the painting process will not be smooth, resulting in an uneven surface of the parts and the inability to wipe off the excess paint.

[0059] Embodiment 18:

[0060] A paint surface friendly cleaning solution comprises nitro lacquer thinner (X-1), gasoline and anhydrous ethanol, wherein the volume ratio of the three is 0:5:50. In this case, since there is no nitro lacquer thinner (X-1) as a main agent, the painting process cannot be carried out at all.

[0061] We gradually adjusted the proportions and conducted tests in this way, with a total of more than 40 proportions. We selected 2A12 hard aluminum (the corrosion resistance of this metal substrate is relatively weak, and it cannot meet the 48h salt spray test environment according to the GJB150a.11A salt spray test) as the metal substrate, sprayed with fluorocarbon coating with good corrosion resistance, and engraved according to different engraving fonts and height requirements (the metal substrate in the groove is exposed on the surface after engraving), and used the prepared paint-friendly cleaning solution to paint the parts after the painted surface was engraved.

[0062] The specific operation includes the following steps:

[0063] Use a painting tool dipped in nitrocellulose lacquer to scrape the inside of the font groove, then use cotton wool dipped in a paint-friendly cleaning solution to make circular motions on the engraved surface to remove excess paint outside the font groove.

[0064] The writing tool is a tool made of a rubber pad for scraping and painting, with a length of 10 mm, a width of 5 mm, and a height of 50 mm.

[0065] Then, the salt spray test was uniformly carried out according to GJB150a.11A for 192 hours and then compared. We concluded that the solvent with a ratio of (10:15:75) was more effective during use. It can not only quickly remove the excess paint outside the font groove, but also effectively ensure that the coating inside the font groove is full and complete. At the same time, it can meet the requirements that there is no corrosion at the lettering after the salt spray test, and the coating around the lettering position (the surface is wiped when removing the excess paint) has no corrosion after the test, which is the same as the coating at other non-lettering positions (the lettering process does not involve this position). This means that this process method can quickly clean the excess nitro lacquer outside the font groove, and at the same time form a complete protection system for the coating inside the font groove, which can effectively ensure the corrosion resistance of the lettering position in long-term use.

[0066] In summary, this method has a simple operation process, high construction efficiency, and full characters after painting, so that the inner coating of the font groove forms a complete protective embodiment, ensuring the corrosion resistance of the lettering position in long-term use, and improving the delivery schedule. The paint-friendly cleaning solution has high cleaning efficiency, little damage to the paint surface, and indirectly reduces production costs.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for painting characters on painted parts, characterized in that The following steps are involved: Use a graffiti tool dipped in nitrocellulose lacquer to scrape the inside of the font groove, then use cotton wool dipped in a paint-friendly quick-cleaning solution to wipe the engraved surface in a circular motion to remove excess paint around the font groove.

2. The method for painting characters on painted parts as claimed in claim 1, characterized in that: The writing tool is a tool for scraping and writing made of rubber cushion, wood, soft metal or composite material.

3. The method for painting characters on painted parts as claimed in claim 1, characterized in that: The paint-friendly quick cleaning solution includes X-1 nitro lacquer thinner, gasoline, and anhydrous ethanol in a volume ratio of 4-25:1-25:50-95.

4. The method for painting characters on a painted surface part according to any one of claims 1 to 3, characterized in that: The dimensions of the writing tool are: length 10mm ~ 50mm, width 1mm ~ 50mm, height 10mm ~ 1000mm.

5. The method for painting characters on painted parts as claimed in claim 2, characterized in that: The writing tool is a tool made of a rubber cushion and used for scraping.

6. The method for painting characters on painted parts as claimed in claim 5, characterized in that: The dimensions of the rubber pad are: 10 mm long, 5 mm wide, and 50 mm high.

7. A paint-friendly cleaning solution formulation, characterized in that: The cleaning solution comprises X-1 nitro paint thinner, gasoline and anhydrous ethanol, and the volume ratio of the three is 5-25:1-25:50-95.

8. The paint-friendly quick cleaning solution formulation according to claim 7, characterized in that: The volume ratio of X-1 nitro lacquer thinner, gasoline and anhydrous ethanol is 4:1:

95.

9. The paint-friendly quick cleaning solution formulation according to claim 7, characterized in that: The volume ratio of X-1 nitro lacquer thinner, gasoline and anhydrous ethanol is 10:1:

89.

10. The use of the paint-friendly quick cleaning solution formulation according to any one of claims 7 to 9, characterized in that: This cleaning solution is used to remove lettering from painted parts.