Hydraulic coating process

Abstract

The invention provides a hydraulic coating process. The hydraulic coating process comprises the following steps: S1, taking a coating material for coating an automobile; s2, glue is sprayed on the coating material for coating the automobile in the step 1; s3, positioning and laminating the coating material for the automobile, which is sprayed with the glue in the step S2, with a framework; and S4, the automobile coating material which is positioned and attached in the step S3 and the framework are pressed in a constant-temperature and constant-pressure liquid pool of the skin and then taken out, and coating is completed. In the process, the constant-temperature and constant-pressure liquid pool is used for providing uniform and stable coating pressure, and due to the fact that fluid has high flexibility and filling performance, the coating operation of the turned-over edge of the back face of the product can be achieved; meanwhile, due to the high latent heat of the liquid pool, a uniform temperature field can be stabilized, sufficient latent heat is ensured to heat the fabric, obvious temperature fluctuation is avoided, glue activation and curing temperature are ensured to be more accurate, and the binding force of a framework and a coating material is improved.

Description

Technical Field

[0001] The invention relates to the field of automobile coating, in particular to a hydraulic coating process. Background Art

[0002] The traditional automatic coating process mainly uses a vacuum adsorption machine to heat the silicone film through a heat source. The film then completes the coating of the fabric and the frame under the action of vacuum adsorption. It can only complete the coating of large flat surfaces and low curvature surfaces. It is also limited by the inability to complete the flanging coating and the small latent heat of the adsorption film. It cannot ensure the uniformity of the fabric heating, resulting in unstable glue activation and uneven bonding, which affects the bonding between the fabric and the frame.

[0003] The localized covering requires the use of special yin and yang membranes and clamps. Dedicated membranes and clamps must be designed for each product, which requires a large one-time investment and is not compatible with other products. The flexibility is low and cannot meet the future trend of small-batch flexibility in the automotive industry. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a hydraulic coating process.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a hydraulic coating process, comprising the following steps: step S1, taking a coating material for automobile coating; step S2, spraying glue on the coating material for automobile coating in step 1; step S3, positioning and bonding the automobile coating material after spraying glue in step S2 to a skeleton; step S4, pressing the automobile coating material and the skeleton that have been positioned and bonded in step S3 in a constant temperature and pressure liquid pool of the skin and then taking them out to complete the coating. In the above process, a constant temperature and pressure liquid pool is used to provide a uniform and stable coating pressure, and since the fluid has high flexibility and filling properties, the coating operation of the back flanging of the product can be achieved; at the same time, since the high latent heat of the liquid pool can stabilize the uniform temperature field, sufficient latent heat is ensured to heat the fabric without obvious temperature fluctuations, ensuring that the glue activation and curing temperatures are more accurate. In this way, since the glue activation and curing temperatures are more accurate, the adhesion between the skeleton and the coating material is better in the products produced by the hydraulic coating process provided by the present invention. At the same time, by adopting the method of hydraulic coating, the force on the coating material is more uniform, the protection of the coating material is better, and the surface appearance will not be damaged. Due to the flexibility of the liquid pool, the hydraulic coating method of the present invention can also adapt to the coating of products of all shapes and has strong versatility.

[0006] Furthermore, in the hydraulic coating process, before step S1 or between step S1 and step S2 or between step S2 and step S3, step S1-1 is also included, and step S1-1 is to grind or apply putty to the skeleton to make the surface of the skeleton smooth.

[0007] Furthermore, in the hydraulic coating process, the hydraulic coating process also includes step S5, and the step S5 includes visually inspecting the product obtained after the coating in step S4 is completed.

[0008] Furthermore, in the hydraulic coating process, a step S6 is provided after the step S5, and the step S6 includes removing excess coating material contained in the product after visual inspection in the step S5.

[0009] Furthermore, in the hydraulic coating process, in step S4, the automobile coating material and the frame that have completed positioning and bonding are pressed in the constant temperature and constant pressure liquid pool of the skin for 10 seconds to 30 seconds and then taken out to complete the coating.

[0010] Furthermore, in the hydraulic coating process, the Newtonian fluid may be water, and the non-Newtonian fluid may be a concentrated solution or suspension of a high molecular polymer. The Newtonian fluid or non-Newtonian fluid is wrapped by the skin, so that the automobile coating material and the frame that have been positioned and bonded are pressed on the Newtonian fluid or non-Newtonian fluid.

[0011] Furthermore, in the hydraulic coating process, in step S4, an automatic loading device is used to take out the coating material and the skeleton that have been positioned and bonded in step S3, and then the automotive coating material and the skeleton that have been positioned and bonded are pressed in a constant temperature and pressure liquid pool of the skin.

[0012] Furthermore, in the hydraulic coating process, the coating material is PVC skin, PU skin, genuine leather or knitted fabric.

[0013] Furthermore, in the hydraulic coating process, the constant temperature and pressure liquid pool 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 coating force for the automobile coating material and the frame that have been positioned and bonded. 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 bonded coating material and the frame. The skin here is a material that can be a leather fabric.

[0014] Compared with the coating process of the prior art, the present invention provides a hydraulic coating process, and the pressure coating process includes: step S1, taking the coating material for automobile coating; step S2, spraying glue on the coating material for automobile coating in step 1; step S3, positioning and bonding the automobile coating material after spraying glue in step S2 with the skeleton; step S4, pressing the automobile coating material and the skeleton that have been positioned and bonded in step S3 in a constant temperature and pressure liquid pool of the skin, and then taking them out to complete the coating. In the above process, after the coating material and the skeleton are positioned and bonded, the skeleton and the coating material are pressed in a constant temperature and pressure liquid pool. In this way, due to the high flexibility and filling capacity of the fluid, the coating operation of the back flange of the product can be realized; at the same time, due to the high latent heat of the liquid pool, the uniform temperature field can be stabilized, ensuring sufficient latent heat to heat the fabric without obvious temperature fluctuations, ensuring that the glue activation and curing temperature are more accurate. In this way, since the activation and curing temperature of the glue is more precise, the bonding force between the skeleton and the coating material is better in the product produced by the hydraulic coating process provided by the present invention. At the same time, the hydraulic coating method is used to make the coating material more uniformly stressed, better protect the coating material, and prevent surface appearance damage. 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 A schematic diagram of the process flow of the hydraulic coating 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 car wrapping, in order to improve the perceived quality of car interior, the car interior needs to be wrapped. In the traditional wrapping process, a vacuum adsorption machine is mainly used to heat the silicone film through a heat source, and then the film completes the wrapping action of the fabric and the frame under the action of vacuum adsorption. However, this process can only complete the wrapping of large flat surfaces and low curvature surfaces, and is limited by the inability to complete the flanging wrapping and the small latent heat of the adsorption film, and the uniformity of the fabric temperature rise cannot be guaranteed, which will cause the glue activation degree to be unstable, and then cause uneven adhesion between the fabric and the frame, affecting the bonding strength between the frame and the fabric. At the same time, because the force on the fabric is not uniform in the traditional wrapping process, the surface of the fabric will be damaged, which also affects the quality of the wrapped product. In the actual wrapping production, the inventor observed the above phenomenon, so he proposed the hydraulic wrapping process claimed to be protected by the present invention. As Figure 1As shown, the hydraulic coating process includes the following steps: first, take the coating material for automobile coating, usually PVC skin, PU skin, leather or knitted fabric. Then, the coating material is sprayed with glue using the existing glue spraying device on the market. The glue sprayed can be automobile glue. The viscosity of the automobile glue can be 10cps-300cps, and the solid content can be 5%-20%. The automobile glue of this viscosity has greater fluidity. It can be sprayed on the coating material quickly, which can greatly improve production efficiency. After that, the coating material and the skeleton completed by spraying glue are preliminarily positioned and bonded to prevent the laminated coating material and skeleton from being misaligned in the subsequent lamination stage, resulting in product scrapping. After the skeleton and the coating material are preliminarily positioned, the preliminarily positioned and bonded skeleton and the coating material are placed in a constant temperature and pressure tank for lamination. Since the fluid has high flexibility and filling properties, the coating operation of the back flange of the product can be realized. At the same time, the high latent heat of the liquid pool can stabilize the uniform temperature field, ensuring sufficient latent heat to heat the coating material without significant temperature fluctuations, ensuring that the glue activation and curing temperatures are more accurate. In this way, since the glue activation and curing temperatures are more accurate, the bonding force between the skeleton and the coating material is better in the products produced by the hydraulic coating process provided by the present invention. At the same time, by using the hydraulic coating method, the coating material is subjected to more uniform force, the coating material is better protected, and no surface appearance damage occurs.

[0021] Furthermore, in the hydraulic coating process provided by the invention, the skeleton can be inspected and polished first. This is because once the glue is cured, the skin can no longer be torn off the skeleton intact. Part of the back bubble and glue will stick to the skeleton when the skin is torn off and cannot be cleaned. Therefore, before coating, workers are required to carefully inspect the skeleton and the coated skin to reduce the defective rate. In particular, when there are defects such as discontinuities, depressions, and particles on the surface of the skeleton, sandpaper can be used to polish the surface of the skeleton. If necessary, putty needs to be appropriately applied to make the surface of the skeleton smooth. In the present invention, the steps of inspecting and polishing the skeleton can occur before step S1, that is, before taking the coating material for automobile coating. It can also occur before step S2 of spraying glue on the coating material for automobile coating. Of course, the steps of inspecting and polishing the skeleton must occur before positioning and fitting the automobile coating material to the skeleton.

[0022] Furthermore, in the hydraulic coating process of the present invention, after the automobile coating material and the skeleton that have been positioned and bonded are pressed together in the constant temperature and constant pressure liquid pool of the skin and then taken out, an intelligent visual defect detection system can be set. The purpose is to quickly discover product defects and improve work efficiency. The intelligent visual inspection system can include a high-definition camera and visual analysis software. The high-definition camera is used to take pictures and record the products that need to be inspected. The visual analysis software is used to analyze the surface of the product recorded in the picture. 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.

[0023] Furthermore, in the hydraulic coating process of the present invention, after visual inspection of the coated product, if excess coating material is found on the coated product, on-site workers can use scissors or wallpaper cutters to cut off the excess coating material after reverse coating.

[0024] Further, in the hydraulic coating process of the present invention, an automatic loading device can be used to take out the coating material and the skeleton that have been bonded. The automatic loading device here can be a manipulator, and the automatic loading device can also include a pressure head, so that the manipulator can take out the coating material and the skeleton that have been bonded, and the pressure head presses the coating material and the skeleton that have been bonded into a constant temperature and constant pressure liquid pool. The pressure head pressed into the liquid pool needs to be kept for a period of time, because the temperature in the constant temperature and constant pressure liquid pool needs to be conducted to the coating material and the skeleton that have been bonded to activate the glue between the skeleton and the coating material. This time can be called the pressing time, and here, the pressing time can be 10 seconds to 60 seconds. Setting this time can, on the one hand, allow the temperature in the constant temperature and constant pressure liquid pool to have enough time to be conducted to the glue between the skeleton and the coating material. On the other hand, the efficiency of the coating work can be improved.

[0025] Preferably, in a hydraulic coating process of the present invention, a Newtonian fluid or a non-Newtonian fluid is contained in the constant temperature and pressure tank. When the liquid in the constant temperature and pressure tank is a Newtonian fluid, it can be water. When the liquid in the constant temperature and pressure tank is a non-Newtonian fluid, it can be a concentrated solution or suspension of a polymer. The concentrated solution or suspension of the polymer can specifically be polyethylene, polyacrylamide, polyvinyl chloride, nylon 6, PVS, celluloid, polyester, rubber solution, various engineering plastics, melts, solutions of chemical fibers, etc. Or it can be a material such as starch liquid. As long as the liquid in the constant temperature and pressure tank has flexibility and high latent heat performance. Constant temperature and pressure can provide a stable coating pressure for coating. And flexibility can realize the coating operation of the back flange of the product without causing damage to the product. High latent heat can stabilize the uniform temperature field, ensure sufficient latent heat to heat the fabric without obvious temperature fluctuations, and ensure that the glue activation and curing temperature are more accurate.

[0026] In summary, in the hydraulic coating process of the present invention, first, the worker takes the coating material for automobile coating, and then sprays glue on the coating material for automobile coating. After that, the worker or the machine fits and positions the coating material sprayed with glue with the skeleton. After fitting and positioning, the robot takes the parts, and the robot after taking the parts puts the coating material and skeleton bonded together into a constant temperature and constant pressure liquid pool, and uses a pressure head to press the coating material and skeleton bonded together into the constant temperature and constant pressure pool and keep them pressed for a period of time, so that the temperature of the Newtonian or non-Newtonian fluid in the constant temperature and constant pressure liquid pool is fully transferred to the glue between the coating material and the skeleton. After completion, the pressure head is raised, and the coating material and skeleton bonded together are taken out by the robot. Finally, the coating material and skeleton bonded together are inspected by the automatic visual inspection system for product defects. Through the above method, since the high latent heat of the constant temperature and pressure liquid pool can stabilize the uniform temperature field, it can ensure sufficient latent heat to heat the fabric without obvious temperature fluctuations, ensure the consistency of glue activation, and thus improve the bonding strength between the skeleton and the coating material. After the coating is completed, by setting automatic feeding and the intelligent visual defect inspection technology in the back stage, the automatic operation of the coating can be realized, and the production efficiency can be improved.

[0027] 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 hydraulic coating process, characterized in that: include, Step S1, taking a coating material for automobile coating; Step S2, spraying glue on the covering material for automobile covering in step S1; Step S3, positioning and bonding the automobile covering material after the glue spraying in step S2 to the frame; Step S4, the automobile covering material and the frame which have been positioned and bonded in step S3 are pressed together in a constant temperature and constant pressure liquid pool of the skin and then taken out to complete the covering.

2. The hydraulic coating process according to claim 1, characterized in that: Before step S1 or between step S1 and step S2 or between step S2 and step S3, step S1-1 is also included. Step S1-1 includes grinding or applying putty to the skeleton to make the surface of the skeleton smooth.

3. The hydraulic coating process according to claim 1, characterized in that: The hydraulic coating process further includes step S5, which includes visually inspecting the product obtained after the coating in step S4.

4. The hydraulic coating process according to claim 3, characterized in that: After step S5, step S6 is further provided, and step S6 includes removing excess coating material contained in the product after visual inspection in step S5.

5. The hydraulic coating process according to claim 1, characterized in that: In step S4, 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 hydraulic coating process according to claim 3, 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 software includes a high-definition camera and visual analysis software.

7. The hydraulic coating process according to claim 1, characterized in that: The constant temperature and constant pressure liquid pool contains non-Newtonian fluid or Newtonian fluid, and is used to provide a stable temperature field and a stable covering force for the automobile covering material and the frame that have been positioned and bonded.

8. The hydraulic coating process according to claim 1, characterized in that: In step S4, the covering material and the frame that have been positioned and bonded in step S3 are taken out by an automatic loading device, and then the automobile covering material and the frame that have been positioned and bonded are pressed in a constant temperature and pressure liquid pool of the skin.

9. The hydraulic coating process according to claim 7, characterized in that: The Newtonian fluid may be water, and the non-Newtonian fluid may be a concentrated solution or suspension of a high molecular polymer. The Newtonian fluid or non-Newtonian fluid is wrapped by the skin, so that the automobile covering material and the skeleton that have been positioned and fitted are pressed onto the Newtonian fluid or non-Newtonian fluid.

10. The hydraulic coating process according to claims 1-9, characterized in that: The coating material is one of PVC skin, PU skin, genuine leather or knitted fabric.

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