Automobile coating silk-screen printing process

Abstract

The invention provides an automobile coating silk-screen printing technology. The automobile coating silk-screen printing technology comprises the following steps that S1, an automobile coating material is taken; s2, injecting glue on the silk screen so as to print the glue on the coating material; and S3, the silk screen is adopted to print glue between the two adjacent coating materials, and continuous and automatic glue supplementing is conducted on the silk screen. According to the automobile coating silk-screen printing technology, the glue is printed on the automobile coating material through the silk screen in the step S2, compared with a traditional automobile coating technology, the glue is printed on the automobile coating material through the silk screen and cannot be sprayed everywhere, the use efficiency of the glue is improved, and pollution to the environment is reduced. The silk screen is adopted to print glue between the two adjacent coating materials, and the reasonable glue storage amount of the glue can be kept on the silk screen by continuously and automatically supplementing the glue on the silk screen, so that the common use and the new use of the glue are ensured, and the problems of glue shortage and printing leakage caused by the blockage of the silk screen can be avoided.

Description

Technical Field

[0001] The invention relates to the field of automobile covering, in particular to a silk screen printing process for automobile covering. Background Art

[0002] The glue coating process of the traditional coating industry is mainly the glue spraying process. The spraying process (whether manual or robot) has problems such as low glue utilization, poor working environment with glue mist, and the generation of glue-containing wastewater. When encountering products that require local glue spraying, traditional manual spraying requires tooling to be shielded, which will lead to more serious glue waste. The flying glue mist of the spray glue often contaminates the surface of the product, causing residual glue defects, reducing the first-time pass rate, and generating a large amount of quality cost waste. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a screen printing process for automobile wrapping.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a car wrapping screen printing process, comprising the following steps: step S1, taking car wrapping material; step S2, adding glue on the screen to print glue on the wrapping material; step S3, using the screen to print glue on two adjacent wrapping materials, and continuously and automatically filling the screen with glue. In the above car wrapping screen printing process, in step S2, the screen is used to print glue on the car wrapping material. Compared with the traditional manual or robot spraying glue on the car wrapping material, the screen is used to print glue on the car wrapping material. The glue will not be sprayed everywhere, which improves the use efficiency of glue and reduces the pollution to the environment or the wrapping material. The screen is used to print glue on two adjacent wrapping materials, and the screen is continuously and automatically filled with glue. The glue to be printed is dripped on the screen between the two wrapping materials that need to be printed with glue, and a reasonable amount of glue is maintained on the screen to ensure that the glue is always used and fresh, which can avoid the problem of glue shortage and missed printing caused by clogging the screen.

[0005] Furthermore, in the automobile wrapping screen printing process, step S4 is further included after step S3, and step S4 includes positioning and bonding the wrapping material on which the printed glue is completed in step S3 to the frame.

[0006] Furthermore, in the automobile covering screen printing process, step S5 is included after step S4, and step S5 includes pressing the covering material and the skeleton that have completed positioning and bonding in a constant temperature and pressure liquid pool of the skin and then taking them out to complete the covering.

[0007] Furthermore, in the automotive wrapping screen printing process, before step S1, it also includes a printing preparation stage, and the printing preparation stage includes the following steps: step S0, installing the screen; step S0-1, adjusting the scraper height; step S0-2, aligning the screen with the printed material.

[0008] Furthermore, in the automobile covering screen printing process, the automobile covering material and the frame that have been positioned and bonded are pressed in the constant temperature and constant pressure liquid pool of the skin for 10 seconds to 60 seconds and then taken out to complete the covering.

[0009] Furthermore, in the automotive wrapping screen printing process, an intelligent visual inspection system is used to perform visual inspection on the product obtained after the wrapping in step S4, and the intelligent visual inspection system includes a high-definition camera and visual analysis software.

[0010] Furthermore, in the automobile covering screen printing process, the automobile covering material is PVC skin, PU skin, genuine leather or knitted fabric.

[0011] Furthermore, in the automobile wrapping screen printing process, the speed of printing glue on the automobile wrapping material using the screen is: 0.1 m / s-2 m / s.

[0012] Furthermore, in the automobile wrapping screen printing process, the screen is a PU / PVC back foam material, and the PU / PVC back foam material is 500-700 mesh.

[0013] Furthermore, in the automobile wrapping screen printing process, the screen is PU / PVC thin fabric / non-woven fabric, and the PU / PVC thin fabric / non-woven fabric is 100-400 mesh.

[0014] Compared with the automobile wrapping process in the prior art, the present invention provides an automobile wrapping screen printing process, comprising the following steps: step S1, taking automobile wrapping material; step S2, adding glue to the screen to print glue on the wrapping material; step S3, using the screen to print glue on two adjacent wrapping materials, and continuously and automatically filling the screen with glue. In the above automobile wrapping screen printing process, in step S2, the screen is used to print glue on the automobile wrapping material. Compared with the traditional manual or robot spraying of glue on the automobile wrapping material, the screen is used to print glue on the automobile wrapping material without spraying glue everywhere, thereby improving the use efficiency of glue and reducing pollution to the environment or the wrapping material. The screen is used to print glue on two adjacent coating materials, and the screen is continuously and automatically filled with glue. The glue to be printed is dripped on the screen between the two coating materials that need to be printed with glue. A reasonable amount of glue is maintained on the screen to ensure that the glue is always used and fresh, which can avoid clogging the screen and causing glue shortage and missing printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the automotive wrapping screen printing process provided by the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0020] In the process of car wrapping, glue is needed to bond the car wrapping material and the frame. The traditional method of applying glue on the car wrapping material is to use the spraying method. Spraying glue on the wrapping material using this method will cause the sprayed glue to form glue microparticles in the air. These glue microparticles will adhere to the wrapped product, causing product contamination and reducing the product's qualified rate. At the same time, if the wrapping material needs to be locally sprayed with glue, traditional manual spraying requires tooling to be shielded, which will lead to more serious waste of glue. Therefore, the inventor proposed a car wrapping screen printing process. Figure 1 As shown, the automobile wrapping screen printing process comprises the following steps: step S1, taking automobile wrapping material; step S2, adding glue to the screen to print glue on the wrapping material; step S3, using the screen to print glue on two adjacent wrapping materials, and continuously and automatically filling the screen with glue. The use of screen printing glue can greatly improve the production efficiency of automobile wrapping, reduce glue consumption, and reduce production costs because of the high printing efficiency. At the same time, because there is no glue mist / man-made secondary pollution, the problem of residual glue contaminating the fabric generated in the traditional glue spraying operation is completely eliminated, and the first-time qualified rate is greatly improved. At the same time, because in the automobile wrapping screen printing process of the present invention, the screen is also continuously and automatically filled with glue between printing glue on two automobile wrapping materials, that is, during the interval of screen printing, which can avoid the problem of glue solidification causing glue to clog the screen and cause glue shortage and missed printing.

[0021] Furthermore, after printing the glue on the coating material, the on-site staff can take out the skeleton. The on-site staff will first complete the preliminary positioning and bonding of the skeleton and the coating material after printing the glue to prevent the laminated coating material and skeleton from being misaligned in the subsequent lamination stage, which will cause the product to be scrapped. The coating material and the skeleton after positioning and bonding are laminated in the constant temperature and pressure liquid pool of the skin and then taken out to complete the coating. In this way, since a constant temperature and pressure liquid pool is used in the production process of the automobile coating product, the quality of the automobile coating product produced by the automobile coating process of the present invention is also higher, because the high flexibility of the liquid pool will not damage the surface of the automobile coating product. Moreover, the automobile wrapping products produced by the automobile wrapping process of the present invention have a longer service life. This is because the liquid pool is flexible and can fully wrap the automobile wrapping products. Under the condition of constant temperature and pressure of the liquid pool, the glue inside the automobile wrapping products can be heated more evenly and accurately, so that the degree of activation of the glue inside the automobile wrapping products is consistent, and the bonding force of the glue is stronger, thereby increasing the service life of the automobile wrapping products. In the present invention, the Newtonian fluid or non-Newtonian fluid is located in the constant temperature and pressure pool and is wrapped by a skin to isolate the Newtonian fluid or non-Newtonian fluid from the completed wrapping material and skeleton. The skin here is a material that can be a leather fabric.

[0022] Furthermore, in the automotive wrapping screen printing process, before step S1, a printing preparation stage can also be included. Before the on-site staff uses the screen to print glue on the wrapping material, they need to install the screen first. After installing the screen, they need to adjust the scraper height. The purpose of adjusting the scraper height is to adjust the force of scraping the glue. After adjusting the scraper height, the screen needs to be aligned with the printed material, and then glue is added to the screen, so that printing can begin. Furthermore, if it is necessary to ensure that the screen is accurately delivered to the right place each time, the position of the feeding tooling can be adjusted, and then glue can be added to the screen.

[0023] Furthermore, after the automobile covering material and the frame that have been positioned and bonded are pressed together in the constant temperature and pressure liquid pool of the skin for 10 seconds to 60 seconds, they are taken out to complete the covering. The purpose of pressing together for 10 seconds to 60 seconds is, on the one hand, to allow the temperature in the constant temperature and pressure liquid pool to have enough time to be transferred to the glue between the frame and the covering material. On the other hand, the efficiency of the covering work can be improved. Preferably, in the present invention, the covering material can be a PVC skin, a PU skin, genuine leather or a knitted fabric.

[0024] Further, in the automobile wrapping screen printing process, the screen used for screen printing is a PU / PVC back foam material, and the PU / PVC back foam material is 500-700 mesh. Since the PU / PVC back foam material has the characteristics of good compressibility and high elasticity, the better the compressibility, the greater the amount of glue output, and combined with the PU / PVC back foam material of 500-700 mesh, the screen using the PU / PVC back foam material can produce glue faster and more evenly, and the faster glue output increases the production speed of automobile wrapping products and improves efficiency. The more even glue output makes the glue between the automobile wrapping material and the skeleton more even, improves the bonding force between the automobile wrapping material and the skeleton, and reduces glue waste. In an embodiment, preferably, the speed of printing glue on the automobile wrapping material using the screen is 0.1 m / s-2 m / s. At this speed, the amount of glue (thickness of the glue layer) printed once can achieve the required bonding strength.

[0025] Further, in the automobile wrapping screen printing process, the screen is a PU / PVC thin fabric / non-woven fabric, and the PU / PVC thin fabric / non-woven fabric is 100-400 mesh. The PU / PVC thin fabric / non-woven fabric has the characteristics of poor compressibility and low elasticity. The worse the compressibility, the stronger its water absorption, and the more it needs to increase the amount of glue. In addition, the PU / PVC thin fabric / non-woven fabric is 100-400 mesh, which can also make the glue output faster and more uniform. In addition, the production speed of automobile wrapping products is also accelerated and the efficiency is improved. Similarly, more uniform glue output makes the glue between the automobile wrapping material and the skeleton more uniform, improves the bonding force between the automobile wrapping material and the skeleton, and reduces glue waste. Preferably, in this embodiment, the speed of printing glue on the automobile wrapping material using the screen is 0.1 m / s-2 m / s. At this speed, the amount of glue (thickness of the glue layer) printed once can achieve the required bonding strength.

[0026] Further, in the automobile wrapping screen printing process, in the automobile wrapping screen printing process provided by the present invention, it is necessary to first detect the raw materials constituting the automobile wrapping product, and the automobile wrapping raw materials include automobile wrapping materials and skeletons. Because there may be defects such as breakage, depression, and particles on the surface of the skeleton, and there may also be indentations, damage, and other phenomena on the surface of the automobile wrapping material. Since the glue cannot be torn off the skin from the skeleton intact once it is solidified, part of the back bubble and glue will stick to the skeleton when the skin is torn off and cannot be cleaned, so workers are required to carefully check the skeleton and the wrapping material before wrapping to reduce the defective rate. When there are defects such as breakage, depression, and particles on the surface of the skeleton, sandpaper can be used to polish the surface of the skeleton, and if necessary, it is necessary to apply putty appropriately to make the surface of the skeleton flat. When the coating material has appearance defects such as indentations and damage, it is only necessary not to use the defective coating material. In the present invention, the step of inspecting and polishing the skeleton can occur before step S1, that is, before taking the coating material for automobile wrapping. It can also occur before the step S2 of applying glue by screen printing on the covering material for automobile covering. Of course, the steps of testing and polishing the frame must occur before positioning and laminating the covering material for automobile and the frame. And the testing of the covering material should of course occur before using the covering material.

[0027] Furthermore, in the automotive wrapping screen printing process, the wrapped product obtained after the wrapping can be inspected by an intelligent visual defect detection system. The purpose of the inspection is to quickly discover product defects and improve work efficiency. The intelligent visual inspection system may include a high-definition camera and visual analysis software. The high-definition camera is used to take photos and record the products to be inspected. The visual analysis software is used to analyze the surface of the product recorded in the photos. When the visual analysis software finds defects on the product, it can issue a reminder or mark it to let the on-site staff know. Preferably, the qualified products inspected by the intelligent visual inspection system may also contain excess wrapping materials. At this time, the on-site staff can remove the excess materials.

[0028] Furthermore, in the automotive wrapping screen printing process, the constant temperature and pressure liquid contains a non-Newtonian fluid or a Newtonian fluid, and the constant temperature and pressure liquid pool is used to provide a stable temperature field and a stable wrapping force for the automotive wrapping material and the frame that have been positioned and bonded. In the present invention, the Newtonian fluid can be water, and the non-Newtonian fluid can be petroleum, mud, coal-water slurry, ceramic slurry, pulp, etc.

[0029] Furthermore, in the automobile wrapping screen printing process, the automobile wrapping process may also include a step of cleaning the screen for printing glue on the wrapping material. Specifically, the glue-containing wastewater left by cleaning the screen may be collected. It can be seen that the automobile wrapping process provided by the present invention can generate very little wastewater compared to the production process of the prior art, because the screen needs to be cleaned only when production is not required. Preferably, a medicament may be used to clean the collected wastewater. The medicament may be a solution containing PAM polyacrylamide and a solution containing PAC polyaluminium chloride. Preferably, the ionicity of PAM polyacrylamide in the solution containing PAM polyacrylamide is 20%-60%, and the concentration of PAC polyaluminium chloride in the solution containing PAC polyaluminium chloride is 26%-30%.

[0030] In summary, in the automobile wrapping screen printing process, first, the worker takes the automobile wrapping material, and then uses the screen to print glue between two adjacent wrapping materials, and continuously and automatically fills the screen with glue. In the above automobile wrapping screen printing process, in step S2, the screen is used to print glue on the automobile wrapping material. Compared with the traditional manual or robot spraying glue on the automobile wrapping material, the screen is used to print glue on the automobile wrapping material. The glue will not be sprayed everywhere, which improves the efficiency of glue use and reduces pollution to the environment or wrapping materials. The screen is used to print glue between two adjacent wrapping materials, and the screen is continuously and automatically filled with glue. The glue to be printed is dripped on the screen between the two wrapping materials that need to be printed with glue. A reasonable amount of glue is maintained on the screen to ensure that the glue is always used and fresh, which can avoid the problem of glue shortage and missed printing caused by clogging the screen.

[0031] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A screen printing process for automobile wrapping, characterized in that: include, Step S1, taking automobile covering materials; Step S2, adding glue to the screen to print the glue on the coating material; Step S3, using the screen to print glue between two adjacent coating materials, and continuously and automatically filling the screen with glue.

2. The automotive wrapping screen printing process according to claim 1, characterized in that: After step S3, step S4 is also included, and step S4 includes the following steps: positioning and bonding the coating material with the printed glue in step S3 to the frame.

3. The automotive wrapping screen printing process according to claim 2, characterized in that: After step S4, step S5 is also included. Step S5 includes the following steps: pressing the positioned and bonded covering material and the frame in a constant temperature and pressure liquid pool of the skin and then taking them out to complete the covering.

4. The automotive wrapping screen printing process according to claim 1, characterized in that: Before step S1, a printing preparation stage is also included, and the printing preparation stage includes the following steps: Step S0, installing the screen; Step S0-1, adjusting the scraper height; Step S0-2, aligning the screen with the printed material.

5. The automotive wrapping screen printing process according to claim 3, characterized in that: The automobile covering material and the frame that have been positioned and bonded are pressed in a constant temperature and constant pressure liquid pool of the skin for 10 seconds to 60 seconds, and then taken out to complete the covering.

6. The automotive wrapping screen printing process according to claim 1, characterized in that: An intelligent visual inspection system is used to perform visual inspection on the product obtained after the coating in step S4, and the intelligent visual inspection system includes a high-definition camera and visual analysis software.

7. The automobile covering process according to claim 1 is characterized in that the automobile covering material is PVC skin, PU skin, genuine leather or knitted fabric.

8. The automotive wrapping screen printing process according to claim 1, characterized in that: The wire mesh is a PU / PVC back foam material, and the PU / PVC back foam material has a mesh size of 500-700.

9. The automotive wrapping screen printing process according to claim 1, characterized in that: The silk screen is PU / PVC thin fabric / non-woven fabric, and the PU / PVC thin fabric / non-woven fabric has a mesh size of 100-400.

10. The automobile wrapping process according to claim 8 or 9, characterized in that: The speed of printing glue on the automobile covering material using the silk screen is: 0.1 m / s to 2 m / s.

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