Advanced UV and transfer printing combined automobile panel process

Abstract

The invention relates to the technical field of automobile panel transfer printing construction, in particular to an advanced UV and transfer printing combined automobile panel process which comprises an injection molding part, primer, printing ink and varnish, the primer is arranged on the surface of the injection molding part, the printing ink is arranged on the surface of the primer, and the varnish is arranged on the surface of the printing ink, S1, the injection molding part is subjected to self-inspection, and it is inspected that the injection molding part is free of burrs, shrinkage, scratches and smudginess; s2, paint spraying pretreatment is conducted, and the air cleanliness of the workpiece feeding environment is set to be hundred thousand levels; s3, carrying out electrostatic dust collection on the injection molding part in an environment with the air cleanliness of hundred thousand levels; the transfer printing fonts are placed under the varnish, so that the original paint protective layer (varnish) can play a role in protecting the transfer printing layer, the transfer printing fonts are prevented from being abraded, the service life of the transfer printing fonts is longer, the problem that the compact varnish does not react with other solvents is solved, the transfer printing process is favorably realized, and the production efficiency is improved. And varnish is attached to the surface of the transfer printing font, so that the attractiveness can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile panel pad printing construction, in particular to an advanced automobile panel process combining UV and pad printing. Background Art

[0002] The current process of combining automotive interior paint and pad printing is to paint the paint before applying the pad printing layer. Although the paint spraying process with relatively mature technology is adopted, and the pad printing ink has the advantages of good durability and wide application range;

[0003] The original process is to directly print on the varnish layer after the varnish layer of the painted product is formed, which can play the role of annotation / decoration of the pad printing layer. However, during use, the pad printing layer is exposed to the outside. Long-term use of the product will cause the pad printing layer to wear and reduce the annotation and decoration effects. Moreover, the varnish layer is formed first, and then the pad printing process is performed. On the paint with high density, it is difficult for the pad printing layer to meet the adhesion requirements with the varnish layer, and the requirements for mixing primer and varnish are very high. If the temperature, humidity and stirring pressure are not properly controlled, it will affect the mixing quality of the primer and varnish, resulting in poor pad printing effect. Summary of the invention

[0004] The present invention provides an advanced automobile panel process combining UV and pad printing, which is beneficial to effectively protect the pad printing layer and to ensure the mixing quality of the primer and the varnish.

[0005] In order to solve the problems of the prior art, the present invention discloses an advanced automobile panel process combining UV and pad printing, including an injection molded part, a primer, ink, a varnish and a mixing device, wherein the primer is arranged on the surface of the injection molded part, the ink is arranged on the surface of the primer, and the varnish is arranged on the surface of the ink;

[0006] S1. Self-inspection of injection molded parts to ensure they are free of burrs, shrinkage, scratches and dirt;

[0007] S2, pre-painting treatment, set the air cleanliness of the loading environment to 100,000 grade;

[0008] S3, then electrostatically precipitate the injection molded parts in an environment with an air cleanliness level of 100,000;

[0009] S4, then pick up the paint to prepare for spraying the injection molded parts, and after picking up the paint, mix the primer and varnish through the mixing device;

[0010] S5. After the primer is prepared, spray paint and level the surface of the injection molded part, and then bake and dry the leveled primer;

[0011] S6. Prepare the ink raw materials by pad printing, transfer the ink raw materials to the primer surface for baking and drying, and then conduct pad printing inspection to ensure that the ink raw materials are qualified;

[0012] S7. After the varnish is prepared, spray the varnish onto the surface of the pad-printed ink, then level it, and finally bake it to dry.

[0013] Furthermore, the mixing device includes a mixing tank, a temperature controller and a booster pump. Two temperature controllers are provided and are respectively installed on the left and right ends of the mixing tank. A left mixing chamber and a right mixing chamber are respectively opened on the left and right sides of the upper end of the mixing tank. The lower ends of the inner walls of the left and right mixing chambers are connected to temperature control rods, temperature sensors and humidity sensors.

[0014] Furthermore, the boosting pumps are provided with two and are respectively arranged at the left and right ends of the mixing tank. The upper ends of the left and right sides of the mixing tank are connected with boosting valves. The left mixing chamber and the right mixing chamber are connected to the adjacent boosting pumps through the boosting valves on the same side.

[0015] Furthermore, feed valves are connected to the left and right sides of the upper end of the mixing tank, one of the feed valves is connected to the left mixing chamber, and the other feed valve is connected to the right mixing chamber.

[0016] Furthermore, a motor is fixed in the middle of the upper end of the mixing tank, a main gear is connected to the power end of the motor, sub-gears meshing with the main gear are provided on both sides of the upper end of the mixing tank, upper shafts are fixed to the lower ends of the sub-gears, the upper shafts are rotated and penetrate into the mixing tank, and one of the upper shafts extends into the left mixing chamber, and the other upper shafts extend into the right mixing chamber, the left mixing chamber and the right mixing chamber are both provided with lower shafts, and a number of stirring blades are fixed on both sides of the lower shafts.

[0017] Furthermore, two L-shaped support plates are fixed to the top of the left and right mixing chambers, semicircular protrusions are fixed to the bottom ends of the L-shaped support plates, lifting plates are fixed to the upper ends of the lower shafts, semicircular impact blocks are fixed to the lower ends of the lifting plates, and the semicircular impact blocks correspond to the arc surfaces of the semicircular protrusions, and fixed plates are fixed to the lower ends of the upper shafts, and a number of spring telescopic rods are connected between the fixed plates and the lifting plates on the same side.

[0018] Furthermore, a left filter chamber and a right filter chamber are respectively opened on the left and right sides of the lower end of the mixing tank, and the tops of the left filter chamber and the right filter chamber are connected to solenoid valves, one of which is communicated with the left mixing chamber, and the other is communicated with the right mixing chamber. Filter nets are fixed in the left filter chamber and the right filter chamber, and the lower ends of both sides of the mixing tank are connected to discharge valves, one of which is communicated with the left filter chamber, and the other is communicated with the right filter chamber.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By placing the pad printing font under the varnish, the original paint protective layer (varnish) can protect the pad printing layer to prevent the pad printing font from being worn and make the pad printing font have a longer service life;

[0021] 2. By placing the pad-printed font under the varnish, the problem of the varnish not reacting with other solvents after being dense is eliminated, which is conducive to the realization of the pad printing process, and the varnish attached to the surface of the pad-printed font can improve the aesthetics;

[0022] 3. Through the cooperation of the thermostat, temperature sensor and temperature control rod, it is convenient to accurately control the ambient temperature in the left mixing room and the right mixing room, and the humidity sensor is convenient to monitor the humidity conditions in the left mixing room and the right mixing room in real time. In addition, in the process of stirring the paint by the stirring blade, combined with the work of the booster pump and the booster valve, it is convenient to control the stirring pressure, and finally the primer or varnish is filtered through the filter net to be qualified. In summary, it is convenient to effectively ensure the quality of the primer or varnish after mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the pad printing structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the pad printing process of the present invention;

[0025] Figure 3 It is a schematic diagram of the mixing device of the present invention;

[0026] Figure 4 Schematic diagram of the internal structure of the mixing tank of the present invention

[0027] Figure 5 A local enlarged structural schematic diagram of the present invention

[0028] Figure 6 It is a schematic diagram of the enlarged structure of the B part of the present invention.

[0029] Figure 1-6 In the figure: injection molding part 1, primer 2, ink 3, varnish 4, mixing box 5, left mixing chamber 6, right mixing chamber 7, temperature controller 8, motor 9, main gear 10, sub-gear 11, feed valve 12, upper shaft 13, lower shaft 14, stirring blade 15, temperature control rod 16, temperature sensor 17, humidity sensor 18, solenoid valve 19, left filter chamber 20, right filter chamber 21, booster pump 22, booster valve 23, filter screen 24, discharge valve 26, fixed plate 27, spring telescopic rod 28, lifting plate 29, L-shaped support plate 30, semicircular protrusion 31, semicircular impact block 32. DETAILED DESCRIPTION

[0030] Advanced UV and pad printing combined automotive panel technology:

[0031] like Figure 1-2As shown, in this embodiment, it includes an injection molded part 1, a primer 2, an ink 3, a varnish 4 and a mixing device, wherein the primer 2 is disposed on the surface of the injection molded part 1, the ink 3 is disposed on the surface of the primer 2, and the varnish 4 is disposed on the surface of the ink 3;

[0032] S1. Injection molded parts 1 are inspected for burrs, shrinkage, scratches and dirt;

[0033] S2, pre-painting treatment, set the air cleanliness of the loading environment to 100,000 grade;

[0034] S3, then electrostatically precipitating the injection molded part 1 in an environment with an air cleanliness level of 100,000;

[0035] S4, then pick up the paint to prepare for spraying the injection molded part 1, and after picking up the paint, first mix the primer 2 and the clear coat 4 through the mixing device;

[0036] S5. After the primer 2 is prepared, spray paint and level the surface of the injection molded part, and then bake and dry the leveled primer 2;

[0037] S6, prepare the raw materials of ink 3 by pad printing, transfer the raw materials of ink 3 to the surface of the primer for baking and drying, and then perform pad printing inspection to ensure that the raw materials are qualified;

[0038] S7, after the varnish 4 is prepared, it is sprayed, the varnish 4 is sprayed onto the surface of the pad-printed ink 2, and then leveled, and finally baked and dried.

[0039] The working principle of the above technical solution is as follows:

[0040] like Figure 2-6As shown, in this embodiment, the mixing device includes a mixing tank 5, a temperature controller 8 and a booster pump 22. The temperature controller 8 is provided with two and is respectively installed at the left and right ends of the mixing tank 5. The left and right sides of the upper end of the mixing tank 5 are respectively provided with a left mixing chamber 6 and a right mixing chamber 7. The lower ends of the inner walls of the left mixing chamber 6 and the right mixing chamber 7 are connected with a temperature control rod 16, a temperature sensor 17 and a humidity sensor 18. The booster pump 22 is provided with two and is respectively arranged at the left and right ends of the mixing tank 5. The upper ends of the left and right sides of the mixing tank 5 are connected to boost valves 23, and the left mixing chamber 6 and the right mixing chamber 7 are connected to the adjacent boost pump 22 through the boost valves 23 on the same side. The left and right sides of the upper end of the mixing tank 5 are connected to feed valves 12, one of which is connected to the left mixing chamber 6, and the other is connected to the right mixing chamber 7. A motor 9 is fixed in the middle of the upper end of the mixing tank 5, and the power end of the motor 9 is connected to a main gear 10. The two sides of the upper end of the mixing tank 5 Each of the above-mentioned gears 11 is provided with a secondary gear 11 meshing with the main gear 10, and an upper shaft 13 is fixed at the lower end of each of the secondary gears 11. Each of the upper shafts 13 rotates and penetrates into the mixing tank 5, and one of the upper shafts 13 extends into the left mixing chamber 6, and the other upper shaft 13 extends into the right mixing chamber 7. Each of the left mixing chamber 6 and the right mixing chamber 7 is provided with a lower shaft 14, and a plurality of stirring blades 15 are fixed on both sides of the lower shaft 14. The left and right sides of the lower end of the mixing tank 5 are respectively provided with left and right stirring blades 15. The filter chamber 20 and the right filter chamber 21, the top of the left filter chamber 20 and the right filter chamber 21 are connected with solenoid valves 19, one of which is communicated with the left mixing chamber 6, and the other solenoid valve 19 is communicated with the right mixing chamber 7, and filter screens 24 are fixed in the left filter chamber 20 and the right filter chamber 21, and the lower ends of both sides of the mixing tank 5 are connected with discharge valves 26, one of which is communicated with the left filter chamber 20, and the other is communicated with the right filter chamber 21.

[0041] First, the raw materials of injection molded part 1 are inspected upon purchase. Injection molded part 1 is made of ABS or PC+ABS material. Injection molded part 1 is further inspected for burrs, shrinkage, scratches and dirt. After the raw materials of injection molded part 1 are inspected, pre-painting treatment is carried out. The air cleanliness of the loading environment is set to Class 100,000. Before electrostatic dust removal of injection molded part 1 is started, the electrostatic dust removal device is set to voltage: 0.2KV, air pressure: 0.4-0.6MP5, and then electrostatic dust removal is carried out on injection molded part 1 in an environment with an air cleanliness of Class 100,000. After electrostatic dust removal is completed, injection molded part 1 waits for painting treatment.

[0042] Then, the paint is collected to prepare for spray painting of the injection molded part 1. After collecting the paint, the primer 2 and the varnish 4 are mixed first. When the paint is added into the left mixing chamber 6 through the feed valve 12 and the primer 2 is mixed in the left mixing chamber 6, the signals of the thermostat 8, the temperature sensor 17 and the temperature control rod 16 on the same side are connected. Therefore, the mixing environment temperature in the left mixing chamber 6 is set to 23±5°C through the cooperation of the thermostat 8, the temperature sensor 17 and the temperature control rod 16. The humidity sensor 18 monitors the ambient humidity to be 65±15%. At the same time, the stirring pressure in the left mixing chamber 6 is set to 0.2-0.5Mpa through the cooperation of the booster pump 22 and the booster valve 23. Then the motor is started to drive the main gear 10, the sub-gear 11, the upper shaft 13, the lower shaft 14 and the stirring blade 15 to rotate. The stirring blade 15 pre-stirs the paint in the left mixing chamber 6 for 20 minutes. Then, the raw materials of the prepared primer 2 are added into the left mixing chamber through the feed valve 12. The paint is mixed in the mixing chamber 6, and the paint ratio is 8:1:4.6-6.4, and then mixed and stirred by the stirring blade 15, and the stirring time is 5-10min. After stirring, the corresponding solenoid valve 19 is opened to discharge the primer 2 in the left mixing chamber 6 into the left filter chamber 20. The filter screen 24 in the left filter chamber 20 is selected as 200 mesh. The filter screen 24 filters the primer 2. The viscosity of the primer 2 after filtration is 10-15 (Iwata 2#). Finally, the primer 2 is stored in the left filter chamber 20, and the activation time is controlled at 1H. The primer 2 is mixed and the mixed primer 2 is discharged through the corresponding discharge valve 26, and the next process is continued. Then the mixed primer 2 is leveled to the surface of the injection molded part 1, and the leveling time is controlled to end at 5-8min. Then the primer 2 is baked, and the baking time is 40±5min, the temperature is controlled at 0-85℃, and the wind speed is 0.3-0.5m / s, until the primer 2 is baked.

[0043] Then, the incoming inspection of the raw materials of ink 3 is carried out. The raw materials of ink 3 are made of resin. Then, the raw materials of ink 3 are pad printed and formulated. In this process, the ambient temperature is set to 23±5, the ambient humidity is 65±15%, the ink 3 ratio is 100:30:6.5, the mixing time is 5-10min, and the activation time is 4H. After the pad printing and formulation of the raw materials of ink 3 are completed, the raw materials of ink 3 are pad printed to the surface of primer 2 for baking and drying. The baking and drying time is 40±5min, and the temperature is 80-85℃, and the wind speed is 0.3-05m / s. After the pad printing of the raw materials of ink 3 is completed, it is inspected again until the color of the inspection surface is uniform, and there are no obvious defects such as missing printing, impurities, scratches, weaving printing, ink overflow, oil accumulation, etc., which is qualified.

[0044] Then, during the preparation of the varnish 4, the paint raw materials are added into the right preparation chamber 7 through the feed valve 12. Therefore, during the preparation of the varnish 4 in the right preparation chamber 7, the preparation environment temperature in the right preparation chamber 7 is set to 23±5 through the cooperation of the thermostat 8, the temperature sensor 17 and the temperature control rod 16, and the humidity sensor 18 monitors the environment humidity to be 65±15%. Then, through the cooperation of the booster pump 22 and the booster valve 23, the stirring pressure in the right preparation chamber 7 is set to 0.2-0.5Mpa. Therefore, the stirring blade 15 is driven by the work of the motor 9 to pre-stir the paint. During the pre-stirring, The time is 20min, and then the raw materials of the prepared varnish 4 are added into the right preparation chamber 7 through the feed valve 12, and the paint ratio is 2:1:0.4-0.8, and then the mixing and stirring is carried out through the stirring blade 15, and the mixing and stirring time is 5-10min. After the stirring is completed, the corresponding electromagnetic valve 19 is opened to discharge the varnish 4 in the right preparation chamber into the right filter chamber 21. The filter screen 24 in the right filter chamber 21 is selected as 300 mesh, so the varnish 4 is filtered through the filter screen 24. The viscosity of the filtered varnish 4 is 12-16 (Iwata 24#), and finally The prepared varnish 4 is stored in the right preparation chamber 21, and the activation time is controlled at 1H. After the varnish 4 is prepared, the prepared varnish 4 is discharged through the corresponding discharge valve 26, and the next process is continued. Then the prepared varnish 4 is sprayed, that is, the varnish 4 is sprayed on the surface of the ink 3. During the spraying process, the ambient temperature is set to 23±5, the ambient humidity is 65±15%, the spray room air supply is 25-43HZ, the spray room exhaust is 30-50HZ, the inlet and outlet wind direction is slightly negative, the air pressure is 05-0.7Mpa, the fan shape is 10-16cm, and the oil volume is 0 -400ML, leveling time is 5-8min, color paint film thickness is 10-15um, varnish 4 film thickness is 25-35u, robot control cabinet pressure is 0.5~0.7Mpa, beat time is controlled at 200±10s, varnish 4 is sprayed onto the surface of ink 3 that has passed the inspection under the above process, after painting, leveling is 5-8min, after leveling, baking is carried out, baking time is 40±5min, temperature is 80-85℃, wind speed is 0.3~0.5m / s, after baking, the final parts are finished, in summary, the whole process is completed.

[0045] like Figure 4 As shown, in this embodiment, two L-shaped support plates 30 are fixed to the top of the left mixing chamber 6 and the right mixing chamber 7, and semicircular protrusions 31 are fixed to the bottom ends of the L-shaped support plates 30. A lifting plate 29 is fixed to the upper end of the lower shaft rod 14, and a semicircular impact block 32 is fixed to the lower end of the lifting plate 29. The semicircular impact block 32 corresponds to the arc surface of the semicircular protrusion 31. A fixing plate 27 is fixed to the lower end of the upper shaft rod 13, and a plurality of spring telescopic rods 28 are connected between the fixing plate 27 and the lifting plate 29 on the same side.

[0046] The upper shaft 13 drives the fixing plate 17, the spring telescopic rod 28, the lifting plate 29 and the semicircular impact block 32 to rotate during the stirring process of the paint, and the semicircular impact block 32 hits the semicircular projection 31 along the arc surface of the semicircular projection 31. At the same time, the semicircular projection 31 pushes the lifting plate 29 upward along the arc surface of the semicircular impact block 32, and the lifting plate 29 compresses the spring telescopic rod 28. At this time, the lifting plate 29 drives the lower shaft 14 and the stirring blade 15 to move upward, and then the elastic force of the spring telescopic rod 28 drives the lifting plate 29 and the semicircular impact block 32 to move down and reset, and the lifting plate 29 drives the lower shaft 14 and the stirring blade 15 to move down, and so on. Therefore, through the continuous collision between the semicircular impact block 32 and the semicircular projection 31, combined with the expansion and contraction of the spring telescopic rod 28, the stirring blade 15 will continuously move up and down to stir, which is beneficial to effectively ensure the uniformity of the paint stirring and mixing, and better ensure the mixing quality of the primer 2 or the varnish 4.

[0047] In summary, by placing the pad-printed font under the varnish 4 through the above process, the original paint protective layer (varnish 4) can play a role in protecting the pad-printed layer to prevent the pad-printed font from being worn, and the pad-printed font has a longer service life; by placing the pad-printed font under the varnish 4, the problem that the varnish 4 does not react with other solvents after being dense is eliminated, which is conducive to the realization of the pad printing process, and the varnish 4 attached to the surface of the pad-printed font can improve the aesthetics, and the new technology of the "new pad printing decoration process" is used, the primer 2 spraying process is adopted before the pad printing process, and the paint-protective layer (varnish 4) is organically combined, which fully and effectively combines the advantages of the pad printing technology and the paint spraying technology. A "new type of pad printing decoration process" that can meet the requirements of adhesion, scratch resistance, light resistance and condensation water under the automotive interior paint test standards has been successfully manufactured, and the cooperation of the thermostat 8, the temperature sensor 17 and the temperature control rod 16 is conducive to accurately controlling the ambient temperature in the left mixing chamber 6 and the right mixing chamber 7, and the humidity sensor 18 is conducive to real-time monitoring of the humidity conditions in the left mixing chamber 6 and the right mixing chamber 7, and in the process of stirring the paint by the stirring blade 15, combined with the work of the booster pump 22 and the booster valve 23, it is conducive to controlling the stirring pressure, and finally the primer 2 or varnish 4 is filtered through the filter net 24 to be qualified. In summary, it is conducive to effectively ensuring the quality of the primer 2 or varnish 4 after mixing.

Claims

1. An advanced automobile panel process combining UV and pad printing, comprising an injection molded part (1), a primer (2), ink (3), a varnish (4) and a mixing device, wherein the primer (2) is disposed on the surface of the injection molded part (1), the ink (3) is disposed on the surface of the primer (2), and the varnish (4) is disposed on the surface of the ink (3), and is characterized in that: S1. Injection molded parts (1) are inspected for burrs, shrinkage, scratches, and dirt; S2, pre-painting treatment, set the air cleanliness of the loading environment to 100,000 grade; S3, then electrostatically precipitating the injection molded part (1) in an environment with an air cleanliness level of 100,000; S4, then receiving paint to prepare for spraying the injection molded part (1), after receiving the paint, firstly mixing the primer (2) and the clear varnish (4) through the mixing device; S5. After the primer (2) is prepared, spraying and leveling are performed on the surface of the injection molded part, and then the leveled primer (2) is baked and dried; S6, performing pad printing of the raw materials of ink (3), pad printing the raw materials of ink (3) onto the surface of the primer, baking and drying, and then pad printing inspection to ensure that the raw materials are qualified; S7, after the varnish (4) is prepared, spraying is performed. The varnish (4) is sprayed onto the surface of the pad-printed ink (2), and then leveled, and finally baked and dried.

2. The advanced UV and pad printing combined automotive panel process according to claim 1 is characterized by: The mixing device comprises a mixing tank (5), a temperature controller (8) and a booster pump (22). Two temperature controllers (8) are provided and are respectively installed at the left and right ends of the mixing tank (5). The left and right sides of the upper end of the mixing tank (5) are respectively provided with a left mixing chamber (6) and a right mixing chamber (7). The lower ends of the inner walls of the left mixing chamber (6) and the right mixing chamber (7) are connected to a temperature control rod (16), a temperature sensor (17) and a humidity sensor (18).

3. The advanced UV and pad printing combined automotive panel process according to claim 2 is characterized by: Two booster pumps (22) are provided and are respectively arranged at the left and right ends of the mixing tank (5). The upper ends of the left and right sides of the mixing tank (5) are connected to booster valves (23). The left mixing chamber (6) and the right mixing chamber (7) are both connected to adjacent booster pumps (22) through the booster valves (23) on the same side.

4. The advanced UV and pad printing combined automotive panel process according to claim 2 is characterized by: Feed valves (12) are connected to the left and right sides of the upper end of the mixing tank (5), one of the feed valves (12) is connected to the left mixing chamber (6), and the other feed valve (12) is connected to the right mixing chamber (7).

5. The advanced UV and pad printing combined automotive panel process according to claim 2 is characterized by: A motor (9) is fixed in the middle of the upper end of the mixing tank (5), and a main gear (10) is connected to the power end of the motor (9). Sub gears (11) meshing with the main gear (10) are provided on both sides of the upper end of the mixing tank (5). Upper shafts (13) are fixed to the lower ends of the sub gears (11). The upper shafts (13) are rotated to penetrate into the mixing tank (5), and one of the upper shafts (13) extends into the left mixing chamber (6), and the other upper shaft (13) extends into the right mixing chamber (7). Lower shafts (14) are provided in the left mixing chamber (6) and the right mixing chamber (7), and a plurality of stirring blades (15) are fixed on both sides of the lower shaft (14).

6. The advanced UV and pad printing combined automotive panel process according to claim 5 is characterized by: Two L-shaped support plates (30) are fixed at the top of the left mixing chamber (6) and the right mixing chamber (7), and a semicircular convex block (31) is fixed at the bottom of the L-shaped support plate (30). A lifting plate (29) is fixed at the upper end of the lower shaft rod (14), and a semicircular impact block (32) is fixed at the lower end of the lifting plate (29). The semicircular impact block (32) corresponds to the arc surface of the semicircular convex block (31). A fixing plate (27) is fixed at the lower end of the upper shaft rod (13), and a plurality of spring telescopic rods (28) are connected between the fixing plate (27) and the lifting plate (29) on the same side.

7. The advanced UV and pad printing combined automotive panel process according to claim 2 is characterized by: A left filter chamber (20) and a right filter chamber (21) are respectively provided on the left and right sides of the lower end of the mixing tank (5). The tops of the left filter chamber (20) and the right filter chamber (21) are both connected to electromagnetic valves (19), one of which is in communication with the left mixing chamber (6), and the other electromagnetic valve (19) is in communication with the right mixing chamber (7). Filter nets (24) are fixed in the left filter chamber (20) and the right filter chamber (21). Discharge valves (26) are connected to the lower ends of both sides of the mixing tank (5), one of which is in communication with the left filter chamber (20), and the other is in communication with the right filter chamber (21).

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