Multi-color coating method for railway vehicles and passenger cars

Abstract

The invention discloses a multi-color coating method for railway vehicles and passenger cars. The multi-color coating method mainly comprises the following steps that S1, a standard car body is manufactured; s2, a pattern color separation standard template device is manufactured, a transparent PET protective film is used as a carrier of the template device, the template device is flatly laid on a vehicle body and fixed through a cloth-based adhesive tape, pattern lines are engraved through a ruler and a stroking pen, and the drawing size is marked on the pattern lines; s3, constructing and calibrating by utilizing the manufactured pattern color separation standard template device; and S4, vehicle spraying and local construction are conducted. The coating method can ensure that the sizes of all colors and patterns outside the vehicle body are uniform, so that the method better adapts to the surface contour change of the railway vehicle body, then all color and pattern coatings are naturally coordinated, protection construction is simple, unit operation can be carried out according to the patterns, and the cost is reduced. And the requirement of spraying finish paint in various colors at the same time can be met only through one-time protection, the operation time can be remarkably shortened on the premise that the product quality is guaranteed, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle color ribbon painting, and in particular to a method for painting rail vehicle passenger cars with multiple colors. Background Art

[0002] As rail vehicles and EMUs enter the era of intelligence, the exterior art ribbon schemes increasingly use multi-line curves to reflect design concepts and national characteristics. The "Dragon and Phoenix" art scheme of the CR400BF intelligent EMU is a typical case. It uses a black blind window strip as the central axis, and the winding curves run through it to achieve the "Dragon and Phoenix" art effect. This complex and long curve with a variety of color matching patterns brings great difficulties and challenges to the painting process. To ensure the consistency, continuity, and beauty of the graphics of batch vehicles and the naturalness and smoothness of the curves, while improving the construction efficiency of personnel, reducing labor intensity, and ensuring the adhesion requirements of the coating are the main problems faced.

[0003] Therefore, based on the above technical problems, technicians in this field urgently need to develop a method for painting railway vehicles and coaches in multiple colors. Summary of the invention

[0004] The purpose of the present invention is to provide a method for painting a railway vehicle coach in multiple colors. The painting method is suitable for painting complex curves and multiple color strips on the exterior of a railway vehicle body. It can ensure the uniformity, continuity, and aesthetics of batch vehicle graphics and the naturalness and smoothness of the curve curvature while improving the construction efficiency of personnel, reducing labor intensity, and also meeting the requirements for coating adhesion.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A method for painting a railway vehicle with multiple colors according to the present invention comprises the following steps:

[0007] Step S1, making a standard car body, firstly, making the large surface color paint of the car body according to the art plan, and spraying the reference color band according to the area of ​​the curve observed in the drawing;

[0008] Step S2, making a standard template device for color separation of graphics, using a transparent PET protective film as a carrier of the template device, laying the template device flat on the vehicle body, fixing it with a cloth-based tape, and using a ruler and a tracing pen to carve graphic lines on the PET film, and marking the drawing size on it, then removing it and laying it flat on the ground, using a wallpaper knife to scrape out hollow parts along the graphic lines at intervals, and using a pencil to draw lines at the hollow part position through the hollow part, and finally sticking transparent tape to complete the production of the standard template device for color separation of graphics;

[0009] Step S3, using the manufactured graphic color separation standard template device for construction and calibration, unfold the template device, paste it on the surface of the vehicle body according to the reference graphic, use a tape measure to measure and move the position of the template device according to the size on the template device, and after the position is fixed, measure the size again; then use a 2B pencil to draw a line along the hollow part of the ribbon, then remove the template device, use a 4mm*4mm square tape to paste it at the drawn line to form a curve trend, and finally use TESA4104 tape to paste the tape along the corner of the square tape;

[0010] Step S4, vehicle spraying and local construction, after the overall color separation and marking of the whole vehicle is completed, spraying construction is carried out according to the set principles; finally, drying or natural drying is carried out to complete the painting construction of multiple colors of the vehicle body.

[0011] Furthermore, the specific operation steps of step S1 are:

[0012] Print the word hole in the complex line ribbon area. If multiple ribbons are combined together, they need to be regarded as a whole word hole. The length of each word hole shall not exceed 2.5m, and they are cut and spliced ​​into a whole ribbon.

[0013] According to the drawing, measure the starting point of the color strip on the car body, temporarily fix the letter hole on the car body and adjust the effect. After the effect is confirmed, use a 2B pencil to outline the color strip area on the car body, use TESA4104 tape to stick the tape along the pencil line, use 320-400# sandpaper to grind the surface and spray a layer of color strip paint. This method is used to complete all the color strips of the vehicle.

[0014] Furthermore, in step S2, the template device has a length of 30000 mm, a width of 1270 mm, and a thickness of 0.175 mm to 0.2 mm.

[0015] Furthermore, in step S2, a wallpaper knife is used to process a hollow portion every 50 mm along the pattern line;

[0016] The length of the hollow portion is 50 mm to 100 mm.

[0017] Furthermore, the setting principle in step S4 is:

[0018] If two color bands are adjacent to each other, spray the light color band first and then the dark color band;

[0019] When spraying light-colored bands, a transition spraying method needs to be used, using dark-colored bands to cover the light-colored bands.

[0020] Furthermore, in step S4, 320-400# sandpaper is used to polish the paint surface, and a scouring pad is used to polish the "step" between the tape and the coating at the edge of the ribbon. For small-angle acute-angle graphics, the acute-angle top corners are chamfered.

[0021] Furthermore, the chamfer size is 1 mm to 2 mm.

[0022] Furthermore, in step S4, the basecoat is continuously sprayed wet-on-wet, and after flash drying for 15 minutes, the clearcoat is sprayed wet-on-wet, and then dried at 60° C. to 80° C. for 2 h to 2.5 h or dried naturally for at least 24 h.

[0023] In the above technical solution, the method for painting a railway vehicle with multiple colors provided by the present invention has the following beneficial effects:

[0024] The coating method of the present invention can ensure that the sizes of the various color patterns on the exterior of the vehicle body are uniform, so as to better adapt to the changes in the surface contour of the rail passenger vehicle body, thereby making the coatings of various color patterns naturally coordinated, and the protective construction is simple. Unit operations can be performed according to the patterns, and only one protection is required to meet the needs of spraying multiple color topcoats at the same time. Under the premise of ensuring product quality, the operation time can be significantly shortened and the operation efficiency can be improved, and the dimensional error after the coating construction is eliminated, the production cycle is effectively guaranteed, and the labor intensity is reduced, so that the multi-color coating of the entire EMU body exterior is simplified and easy to operate.

[0025] The coating method of the present invention fills the gap in the domestic new EMU multi-color coating construction process technology, and can be widely used in products such as the "Fuxing" high-speed EMU related projects, intelligent high-speed EMU projects, and 400-kilometer EMU projects. The benefits that can be achieved by the present invention include economic benefits, reduced recovery benefits of defective products, and reduced benefits of man-hour savings: from the perspective of economic benefits, a large amount of material and labor costs are saved, specifically: reducing the total amount of material use by 6%-10%, and reducing the construction time and later repair construction time by 20%-40%. At the same time, the product quality is improved. After the exterior of the car body is painted, the conflict problem that occurs in the construction of each color of the paint coating on the surface of the EMU body is solved, and the size error of the dislocation of the adjacent two colors and the same color pattern on both sides is eliminated, so as to obtain a good, perfect and natural coating effect, so that the multi-color pattern can be sprayed normally, and the high-precision requirements of the color pattern coating on the surface of the car body can be effectively controlled and a bright and full paint film can be obtained.

[0026] The coating method of the present invention achieves economic benefits = (original price of a single product - current price of a single product) × monthly sales × 12 months = (10-8.5) × 100 × 12 = 18 million / year; the recovery benefits of reducing defective products = (monthly number of defective products before improvement - monthly number of defective products after improvement) × unit price of each product × 12 months = (15-5) × 5.5 × 12 = 6.6 million / year; the benefits of reducing labor hours saved = monthly saved labor hours × hourly wages × 12 months = (20X30) × 50 × 12 = 360,000 / year. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 A schematic diagram of the color ribbon painting sequence numbers and the matching positions of the color ribbons of each sequence number in a method for painting a railway vehicle coach in multiple colors disclosed in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] Serial numbers 1 to 5 are all ribbon numbers. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 As shown;

[0033] A method for painting a railway vehicle with multiple colors in this embodiment comprises the following steps:

[0034] Step S1, making a standard car body, firstly, making the large surface color paint of the car body according to the art plan, and spraying the reference color band according to the area of ​​the curve observed in the drawing;

[0035] Step S2, making a standard template device for color separation of graphics, using a transparent PET protective film as a carrier of the template device, laying the template device flat on the vehicle body, fixing it with a cloth-based tape, and using a ruler and a tracing pen to carve graphic lines on the PET film, and marking the drawing size on it, then removing it and laying it flat on the ground, using a wallpaper knife to scrape out hollow parts along the graphic lines at intervals, and using a pencil to draw lines at the hollow part position through the hollow part, and finally sticking transparent tape to complete the production of the standard template device for color separation of graphics;

[0036] Step S3, using the manufactured graphic color separation standard template device for construction and calibration, unfold the template device, paste it on the surface of the vehicle body according to the reference graphic, use a tape measure to measure and move the position of the template device according to the size on the template device, and after the position is fixed, measure the size again; then use a 2B pencil to draw a line along the hollow part of the ribbon, then remove the template device, use a 4mm*4mm square tape to paste it at the drawn line to form a curve trend, and finally use TESA4104 tape to paste the tape along the corner of the square tape;

[0037] Step S4, vehicle spraying and local construction, after the overall color separation and marking of the whole vehicle is completed, spraying construction is carried out according to the set principles; finally, drying or natural drying is carried out to complete the painting construction of multiple colors of the vehicle body.

[0038] More specifically, the specific operation steps of step S1 in this embodiment are:

[0039] Print the word hole in the complex line ribbon area. If multiple ribbons are combined together, they need to be regarded as a whole word hole. The length of each word hole shall not exceed 2.5m, and they are cut and spliced ​​into a whole ribbon.

[0040] According to the drawing, measure the starting point of the color strip on the car body, temporarily fix the letter hole on the car body and adjust the effect. After the effect is confirmed, use a 2B pencil to outline the color strip area on the car body, use TESA4104 tape to stick the tape along the pencil line, use 320-400# sandpaper to grind the surface and spray a layer of color strip paint. This method is used to complete all the color strips of the vehicle.

[0041] Preferably, in step S2 of this embodiment, the template device has a length of 30000 mm, a width of 1270 mm, and a thickness of 0.175 mm to 0.2 mm.

[0042] Preferably, in step S2 of this embodiment, a wallpaper knife is used to process a hollow portion along the graphic line every 50 mm; wherein the length of the hollow portion of this embodiment is 50 mm to 100 mm.

[0043] Preferably, the setting principle in step S4 of this embodiment is:

[0044] If two color bands are adjacent to each other, spray the light color band first and then the dark color band;

[0045] When spraying light-colored bands, a transition spraying method needs to be used, using dark-colored bands to cover the light-colored bands.

[0046] Secondly, in step S4 of this embodiment, 320-400# sandpaper is used to polish the paint surface, and the edge of the ribbon is polished with a scouring pad to polish the "step" between the tape and the coating. For small-angle acute-angle graphics, the acute-angle vertex position is chamfered. Among them, the chamfer size of this embodiment is 1mm to 2mm.

[0047] Finally, in step S4 of this embodiment, the basecoat is sprayed wet-on-wet continuously, and after flash drying for 15 minutes, the clearcoat is sprayed wet-on-wet again, and then the mixture is dried at 60° C. to 80° C. for 2 h to 2.5 h or dried naturally for at least 24 h.

[0048] See also Figure 1 As shown, Figure 1 In the figure, each serial number represents a ribbon serial number, not a component serial number. The construction and painting are carried out according to the sequence of the ribbon serial numbers in the following embodiment. This embodiment takes the painting of the side wall of the vehicle body as an example for further explanation:

[0049] Step S1, making a standard vehicle body;

[0050] First, according to Figure 1 Art plan, the whole car body is painted with color No. 1; spray No. 2 according to the drawing; print No. 3, 4, 5 word leaks, where No. 3 and No. 4 are connected with two color ribbons, and No. 3 and 4 are printed as one color ribbon. At the same time, print a copy of No. 4 separately, and the length of each word leak shall not exceed 2500mm. Cut the color ribbon and splice it into a whole color ribbon with tape; measure the starting point of the color ribbon on the car body according to the drawing, temporarily fix the word leak on the car body, and adjust the effect by the designer. After the effect is confirmed, use 2B pencil to outline the color ribbon area on the car body, and use TESA4104 tape to stick the tape along the pencil line; use 320-400# sandpaper to polish the surface and spray the color ribbon paint method to spray No. 3 first, then spray No. 4 and 5.

[0051] Step S2, making a standard template device for color separation of graphics;

[0052] Lay the transparent PET protective film (30000mmx1270mmx0.175mm) flat on the car body and fix it with cloth-based tape; use a ruler, tracing pen and other tools to draw lines 3, 4, and 5 on the PET film. A reference edge of number 2 and the door, car end and other positions also need to be drawn; mark the size of the drawing and stick transparent tape; remove it and lay it on the ground, use a wallpaper knife to hollow out the lines along the graphic lines every 50mm, with a hollow length of 50mm-100mm. Number 4 needs to be made of another PET protective film. After the process design is signed and confirmed, the graphic color separation standard template device is completed.

[0053] Step S3, spraying and construction using a device for making a standard template for color separation of graphics;

[0054] The device for making color separation graphics standard template is unfolded, and it is pasted on the surface of the vehicle body according to the reference drawing. A tape measure is used to measure and move the template position according to the size on the device for making color separation graphics standard template. After the position is fixed, the size is measured again; a 2B pencil is used to mark the serial numbers 3 and 4 (3 and 4 are regarded as a whole) and serial number 5 along the hollow position of the ribbon; the device for making color separation graphics standard template is removed, and the corner of a 4mmX4MM square tape (the color is clearly distinguished from the vehicle body) is pasted on the marked line to form a curve trend; finally, TESA4104 tape is used to paste the tape along the corner of the square tape, and the arc area is adjusted by visual inspection and slight deformation of the tape. The acute angles at the ends of the serial numbers 3, 4, and 5 are relatively small. In order to increase the adhesion, it is necessary to reverse the sharp angle tip 2mm away and paste the tape, and then use a wallpaper knife to round the corners; after the color separation tape is completed, the graphic color separation standard template device is used for construction and calibration for secondary calibration.

[0055] Protective materials are pasted around the tape to expose only the total area of ​​​​sequence numbers 3 and 4 to be sprayed, and 320-400# sandpaper is used to grind the paint surface. The "step" of the tape and the coating is polished with a fine scouring pad at the edge of the ribbon to enhance the adhesion of the edge of the ribbon; wet-on-wet continuous spraying of sequence number 3 (light color) base paint is used to ensure good hiding power, and after flashing for 15 minutes, wet-on-wet spraying of clear varnish is applied, and it is dried at 60-80℃ for 2-2.5 hours or dried naturally for at least 24 hours; remove the protection of sequence number 5, use the graphic color separation standard template device of sequence number 4 to mark out the spraying area of ​​sequence number 4, and mask the unsprayed area, and use wet-on-wet continuous spraying of sequence numbers 4 and 5 (they can be constructed simultaneously at a long distance) base paint to ensure good hiding power, and after flashing for 15 minutes, wet-on-wet spraying of clear varnish is applied, and it is dried at 60-80℃ for 2-2.5 hours or dried naturally for at least 24 hours, and the protective materials of the entire vehicle are removed.

[0056] In the above technical solution, the method for painting a railway vehicle with multiple colors provided by the present invention has the following beneficial effects:

[0057] The coating method of the present invention can ensure that the sizes of the various color patterns on the exterior of the vehicle body are uniform, so as to better adapt to the changes in the surface contour of the rail passenger vehicle body, thereby making the coatings of various color patterns naturally coordinated, and the protective construction is simple. Unit operations can be performed according to the patterns, and only one protection is required to meet the needs of spraying multiple color topcoats at the same time. Under the premise of ensuring product quality, the operation time can be significantly shortened and the operation efficiency can be improved, and the dimensional error after the coating construction is eliminated, the production cycle is effectively guaranteed, and the labor intensity is reduced, so that the multi-color coating of the entire EMU body exterior is simplified and easy to operate.

[0058] The coating method of the present invention fills the gap in the domestic new EMU multi-color coating construction process technology, and can be widely used in products such as the "Fuxing" high-speed EMU related projects, intelligent high-speed EMU projects, and 400-kilometer EMU projects. The benefits that can be achieved by the present invention include economic benefits, reduced recovery benefits of defective products, and reduced benefits of man-hour savings: from the perspective of economic benefits, a large amount of material and labor costs are saved, specifically: reducing the total amount of material use by 6%-10%, and reducing the construction time and later repair construction time by 20%-40%. At the same time, the product quality is improved. After the exterior of the car body is painted, the conflict problem that occurs in the construction of each color of the paint coating on the surface of the EMU body is solved, and the size error of the dislocation of the adjacent two colors and the same color pattern on both sides is eliminated, so as to obtain a good, perfect and natural coating effect, so that the multi-color pattern can be sprayed normally, and the high-precision requirements of the color pattern coating on the surface of the car body can be effectively controlled and a bright and full paint film can be obtained.

[0059] The coating method of the present invention achieves economic benefits = (original price of a single product - current price of a single product) × monthly sales × 12 months = (10-8.5) × 100 × 12 = 18 million / year; the recovery benefits of reducing defective products = (monthly number of defective products before improvement - monthly number of defective products after improvement) × unit price of each product × 12 months = (15-5) × 5.5 × 12 = 6.6 million / year; the benefits of reducing labor hours saved = monthly saved labor hours × hourly wages × 12 months = (20X30) × 50 × 12 = 360,000 / year.

[0060] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for painting a railway vehicle with multiple colors. It is characterized in that The method comprises the following steps: Step S1, making a standard car body, firstly, making the large surface color paint of the car body according to the art plan, and spraying the reference color band according to the area of ​​the curve observed in the drawing; Step S2, making a standard template device for color separation of graphics, using a transparent PET protective film as a carrier of the template device, laying the template device flat on the vehicle body, fixing it with a cloth-based tape, and using a ruler and a tracing pen to carve graphic lines on the PET film, and marking the drawing size on it, then removing it and laying it flat on the ground, using a wallpaper knife to scrape out hollow parts along the graphic lines at intervals, and using a pencil to draw lines at the hollow part position through the hollow part, and finally sticking transparent tape to complete the production of the standard template device for color separation of graphics; Step S3, using the manufactured graphic color separation standard template device for construction and calibration, unfold the template device, paste it on the surface of the vehicle body according to the reference graphic, use a tape measure to measure and move the position of the template device according to the size on the template device, and after the position is fixed, measure the size again; then use a 2B pencil to draw a line along the hollow part of the ribbon, then remove the template device, use a 4mm*4mm square tape to paste it at the drawn line to form a curve trend, and finally use TESA4104 tape to paste the tape along the corner of the square tape; Step S4, vehicle spraying and local construction, after the overall color separation and marking of the whole vehicle is completed, spraying construction is carried out according to the set principles; finally, drying or natural drying is carried out to complete the painting construction of multiple colors of the vehicle body.

2. A method for painting a railway vehicle with multiple colors according to claim 1, It is characterized in that The specific operation steps of step S1 are: Print the word hole in the complex line ribbon area. If multiple ribbons are combined together, they need to be regarded as a whole word hole. The length of each word hole shall not exceed 2.5m, and they are cut and spliced ​​into a whole ribbon. According to the drawing, measure the starting point of the color strip on the car body, temporarily fix the letter hole on the car body and adjust the effect. After the effect is confirmed, use a 2B pencil to outline the color strip area on the car body, use TESA4104 tape to stick the tape along the pencil line, use 320-400# sandpaper to grind the surface and spray a layer of color strip paint. This method is used to complete all the color strips of the vehicle.

3. A method for painting a railway vehicle with multiple colors according to claim 1, It is characterized in that In step S2, the template device has a length of 30000 mm, a width of 1270 mm, and a thickness of 0.175 mm to 0.2 mm.

4. A method for painting a railway vehicle with multiple colors according to claim 3, It is characterized in that In step S2, a wallpaper knife is used to process a hollow portion every 50 mm along the pattern line; The length of the hollow portion is 50 mm to 100 mm.

5. A method for painting a railway vehicle with multiple colors according to claim 1, It is characterized in that The setting principle in step S4 is: If two color bands are adjacent to each other, spray the light color band first and then the dark color band; When spraying light-colored bands, a transition spraying method needs to be used, using dark-colored bands to cover the light-colored bands.

6. A method for painting a railway vehicle with multiple colors according to claim 5, It is characterized in that In step S4, 320-400# sandpaper is used to polish the paint surface, and the edge of the ribbon is polished with a scouring pad to form a "step" between the tape and the coating. For small-angle acute-angle graphics, the acute-angle vertex position is chamfered.

7. A method for painting a railway vehicle with multiple colors according to claim 6, It is characterized in that The chamfer size is 1 mm to 2 mm.

8. A method for painting a railway vehicle with multiple colors according to claim 6, It is characterized in that In step S4, the basecoat is continuously sprayed wet-on-wet, and after flash drying for 15 minutes, the clearcoat is sprayed wet-on-wet, and then dried at 60° C. to 80° C. for 2 h to 2.5 h or dried naturally for at least 24 h.

Images