Indoor latex paint brushing process for eliminating wall hollowing hidden danger

Abstract

An indoor latex paint brushing process capable of eliminating wall hollowing hidden danger relates to the technical field of buildings and sequentially comprises the steps of construction preparation, modeling by high-precision scanning equipment, acquisition of wall humidity, temperature and roughness data by a multi-parameter detector to plan a mechanical arm path, and construction of the wall hollowing hidden danger. Materials (such as a high-pressure water jet cutter with specific parameters, modified epoxy resin emulsion and the like) in all stages are prepared, and equipment is debugged to be connected with a detection system; the base layer is treated, specifically, a 20-30 MPa high-pressure water jet cutter is matched with a spray head with the specific rotating speed to conduct micro-etching on the wall face, and then a nanoscale silane coupling agent solution is sprayed; and then stress release layer construction, intelligent brushing, quality control, comprehensive acceptance after completion, site cleaning and delivery are performed, and meanwhile after-sales service and return visit are provided. Through the synergistic effect of high-pressure water jet microetching and the nano coupling agent, the interface bonding force is increased to 2.5 MPa or above; construction parameters are adjusted in real time based on environmental parameters, accurate control over the whole process is achieved, and the hollowing rate is reduced to 0.1% or below.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to an indoor latex paint painting process for eliminating the hidden danger of hollowing on wall surfaces. Background Art

[0002] In the current field of indoor latex paint construction, wall hollowing is a long-standing problem that has plagued the industry, seriously affecting the decorative effect and service life of the wall. Insufficient wall base strength is one of the key factors that cause hollowing. During the construction process, the proportion of base materials and the construction process are improperly controlled, resulting in the base being unable to provide stable support for the subsequent latex paint coating. Over time, the coating is easily separated from the base, forming hollows. At the same time, poor interfacial bonding is also an important reason. Traditional construction processes fail to fully optimize the interface between the wall base and the latex paint coating. Impurities and unevenness on the surface of the base hinder the effective bonding between the two and greatly reduce the interfacial bonding strength. In addition, uneven material shrinkage stress cannot be ignored. During the drying and curing process, latex paint and related auxiliary materials shrink to different degrees due to their own characteristics and environmental factors. This uneven shrinkage stress is concentrated in local areas of the wall, gradually leading to the hollowing phenomenon.

[0003] Traditional solutions to the problem of wall hollowing suffer from significant flaws. In most cases, they rely solely on a single interface agent to improve the adhesion between the base layer and the coating. However, this single agent cannot fully address complex issues such as insufficient base layer strength and uneven material shrinkage stress, and cannot fundamentally eliminate the risk of hollowing. Furthermore, the construction process relies excessively on manual judgment, resulting in varying skill levels and experience among construction workers, leading to inconsistent construction quality. Manual judgment lacks precision and comprehensiveness in detecting potential wall hollowing, making it difficult to detect even subtle early signs of hollowing. More significantly, traditional construction techniques lack real-time monitoring and dynamic adjustment mechanisms. During the construction process, wall conditions, such as humidity and temperature, constantly fluctuate, significantly affecting the performance of latex paint. However, traditional processes are unable to detect these environmental changes in real time and dynamically adjust construction parameters accordingly. This results in extremely poor construction quality consistency, leading to frequent wall hollowing problems and numerous quality risks and financial losses for architectural decoration projects. Summary of the Invention

[0004] The purpose of the present invention is to provide an indoor latex paint painting process that eliminates the hidden danger of wall hollowing, so as to solve the technical defects pointed out in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A process for applying indoor latex paint to eliminate the hidden danger of hollowing on walls comprises the following steps in sequence:

[0007] Step S1. Construction preparation: Use high-precision scanning equipment to build a three-dimensional digital model of the wall, use a multi-parameter detector to collect wall data, and plan the robot arm path in combination with the building structure; prepare a variety of materials required for construction, including specific high-pressure water jets and supporting solutions for base layer treatment, specific materials and mixing equipment for stress release layers, standard latex paints and additives, and specific interface enhancers for quality control; debug relevant construction equipment and connect quality inspection equipment to the control system.

[0008] Step S2. Base treatment: honeycomb micro-etching is performed on the wall surface using a high-pressure water jet at a pressure of 20-30 MPa and a nozzle at a rotation speed of 1500-2500 rpm, followed by spraying a nano-scale silane coupling agent solution at a pressure of 0.2-0.3 MPa.

[0009] Step S3. Construction of stress release layer: first spray the modified epoxy resin emulsion at a pressure of 0.3-0.4 MPa, then scrape on the evenly stirred two-component phase change wet putty and polish.

[0010] Step S4. Intelligent painting: The multi-spectral detector at the end of the robotic arm collects wall data, and the control system adjusts the latex paint formula and the pressure of the spraying device accordingly. The robotic arm sprays according to the planned path.

[0011] Step S5. Quality control: Before the coating cures, the wall coating is inspected using laser-induced breakdown spectroscopy equipment. Suspicious areas are re-coated with an interface enhancer, and quality data throughout the construction process is recorded and analyzed.

[0012] Step S6. Finishing work: After the construction is completed, conduct a comprehensive inspection of the wall surface, clean up the construction site, deliver the wall surface, and provide after-sales service and return visits.

[0013] Furthermore, in step S1, the high-precision scanning device is a three-dimensional laser scanner with millimeter-level accuracy, and the multi-parameter detector is a multi-spectral detector with a humidity measurement accuracy of ±1% RH, a temperature measurement accuracy of ±0.5°C, and the ability to accurately obtain Ra values ​​to measure roughness.

[0014] Furthermore, in step S1, the high-pressure water jet used for base treatment is equipped with a rotating nozzle, and its spray angle and aperture are set according to preset settings, which can form a uniform honeycomb micro-etching effect on the wall surface, and the high-pressure water jet pressure is ≥20MPa.

[0015] Furthermore, in step S2, the nano-scale silane coupling agent solution contains γ-aminopropyltriethoxysilane and nano-silicon dioxide dispersion, and has a solid content of 3-5%.

[0016] Furthermore, in step S3, the elastic modulus of the modified epoxy resin emulsion is ≤150 MPa, and the elongation at break is ≥800%.

[0017] Furthermore, in step S3, the two-component phase change moisture-adjusting putty contains phase change material particles with a particle size of 10-20 μm and a proportion of 5-10%, and corresponding mixing equipment.

[0018] Furthermore, in step S4, the multi-spectral detector and the spraying device carried by the end of the robotic arm can collaboratively realize real-time data collection of the wall and precise spraying of latex paint, and the pressure of the spraying device can be accurately adjusted between 0.3-0.6MPa.

[0019] Furthermore, in step S5, the laser induced breakdown spectroscopy equipment can accurately detect the diffusion of interface elements before the coating is cured, providing data support for quality control.

[0020] Furthermore, in step S5, the interface enhancer contains 0.1-0.3% graphene nanosheets.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention uses the synergistic effect of high-pressure water jet micro-etching and nano-coupling agents to increase the interfacial bonding strength to above 2.5 MPa; the construction parameters are adjusted in real time based on environmental parameters to achieve precise control of the entire process, reducing the hollowing rate to below 0.1%; the stress release layer is combined with the phase change material to effectively alleviate the problem of internal stress concentration caused by changes in temperature and humidity; LIBS technology realizes non-destructive testing of the interface bonding quality, breaking through the limitations of traditional manual tapping detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 these drawings without paying any creative work.

[0024] Figure 1 It is a logic block diagram of the present invention. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of 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 making creative efforts are within the scope of protection of the present invention.

[0026] Step S1: Construction preparation

[0027] Wall Data Collection: A 3D laser scanner capable of millimeter-level scanning is used to perform a comprehensive and detailed scan of the interior walls. Data collection for the entire house can be completed in approximately two hours. A multispectral detector with humidity, temperature, and roughness detection capabilities is used to collect comprehensive wall data at a rate of one scan per 10 square meters. This process takes approximately three hours. The collected data is then imported into professional data analysis software for in-depth analysis of the wall condition and, based on this information, the movement path of the six-axis robotic arm is planned.

[0028] Material preparation: Use a high-pressure water jet with a pressure of 25MPa, a spray angle of 30 degrees, and a pore size of 2mm, which can create a uniform honeycomb micro-etching effect on the wall surface. Prepare a nano-scale silane coupling agent solution containing γ-aminopropyltriethoxysilane and nano-silica dispersion, with the solid content precisely controlled at 4%. Prepare a modified epoxy resin emulsion with an elastic modulus of 120MPa and an elongation at break of 900%, as well as a two-component phase change wet-adjusting putty containing 15μm particle size and 8% phase change material particles, and equip it with the corresponding mixing equipment. At the same time, prepare latex paint that meets national standards and the corresponding film-forming agents, rheological agents, and an interface enhancer containing 0.2% graphene nanosheets.

[0029] Equipment debugging: The high-pressure water jet was debugged for two hours to ensure the nozzle speed could be maintained at a stable 2000rpm. The six-axis robotic arm was calibrated to achieve a motion accuracy of ±0.5mm. The spraying device was also debugged to ensure that the spray pressure could be precisely adjusted within the range of 0.3-0.6MPa. The laser-induced breakdown spectroscopy (LIBS) equipment was debugged and connected to the control system. This debugging process took approximately 1.5 hours.

[0030] Step S2: Base layer processing

[0031] High-pressure water jet micro-etching: Construction workers hold a high-pressure water jet gun, maintain a distance of 12 cm from the wall, and perform micro-etching on the wall in strict accordance with a pre-planned path. After approximately 8 hours of continuous operation, the entire wall is micro-etched, forming a micro-anchor structure with a depth of 70 μm and a density of 250 per cm².

[0032] Nano-silane coupling agent solution spraying: After the micro-etching work is completed, the nano-silane coupling agent solution is evenly sprayed onto the wall surface using a dedicated spraying device at a pressure of 0.25 MPa. The solution fully penetrates to a depth of up to 2.5 mm. The spraying process takes about three hours.

[0033] Step S3: Construction of stress relief layer

[0034] Modified Epoxy Resin Emulsion Spraying: Pour the modified epoxy resin emulsion into the spray barrel of the spray equipment. Adjust the spray pressure to 0.35 MPa. Move the spray gun perpendicular to the wall at a constant speed to ensure that the coating thickness is uniformly controlled at 0.2 mm. After spraying, let the coating dry naturally for 3 hours.

[0035] Phase-change moisture-adjusting putty: Mix the two-component phase-change moisture-adjusting putty according to the specified ratio and stir for 5 minutes to achieve a thorough uniformity. Then, use a scraper to evenly apply the putty to the dried modified epoxy resin emulsion coating to a thickness of 1.8mm. After application, sandpaper is used to polish the putty layer to achieve the required smoothness. The entire house construction took approximately 10 hours.

[0036] Step S4: Smart painting

[0037] Real-time data collection and transmission: The six-axis robotic arm starts working, and the multi-spectral detector at its end collects real-time humidity, temperature, and roughness data of the wall at a frequency of 120Hz, and transmits the data to the control system in real time through a wireless transmission module.

[0038] Latex paint formula adjustment: The control system accurately adjusts the ratio of additives in the latex paint based on real-time data collected from the wall. The film-forming agent is adjusted to 0.5%, and the rheological agent to 0.3%. After these adjustments are made, the paint is thoroughly mixed using a mixing device.

[0039] Spraying Pressure Adjustment and Application: The control system adjusts the spraying pressure to 0.4 MPa based on the actual wall surface conditions. The robotic arm sprays along a pre-planned path, adjusting its movement speed and spraying angle in real time based on the wall's shape and curvature to ensure coating thickness uniformity within a ±3% tolerance. After spraying, the wall undergoes a preliminary inspection, a process that takes approximately 12 hours.

[0040] Step S5: Quality Control

[0041] Laser-induced breakdown spectroscopy (LIBS): Before the latex paint cures, the LIBS device performs a comprehensive scan of the wall coating. The device scans at a speed of 1 square meter per minute, covering the entire wall surface.

[0042] Marking and treating suspicious areas: If the LIBS system detects a suspicious area, the control system automatically marks it. The operator then uses a specialized tool to reapply a 0.08mm thick layer of interface enhancer to the suspicious area. After reapplying, the area is retested using the LIBS system to ensure that the interface quality meets standard requirements.

[0043] Quality Data Recording and Analysis: Record quality inspection data from the entire construction process, including initial wall surface data, real-time data during construction, and quality inspection results. This data is then analyzed and summarized using data analysis software, providing valuable experience for subsequent construction. This process takes approximately four hours.

[0044] Step S6: Finishing work

[0045] Overall acceptance: Professional testing tools were used to conduct a comprehensive inspection of the wall surface's smoothness, coating thickness uniformity, color consistency, and bonding strength. All indicators were found to meet relevant standards.

[0046] Cleaning up the construction site: Removing any remaining materials, equipment, and tools from the construction site, sorting and collecting any waste generated during the construction process, and properly disposing of it. Cleaning and maintaining construction equipment, as well as thoroughly cleaning the construction area to restore it to its pre-construction state, takes approximately 5 hours.

[0047] Delivery and After-Sales Service: The completed and qualified wall panels will be delivered to the customer, and a one-year after-sales service will be provided. During the after-sales service period, regular visits will be made to the wall panels to keep abreast of their usage and ensure the long-term stability of their quality.

[0048] The present invention uses the synergistic effect of high-pressure water jet micro-etching and nano-coupling agents to increase the interfacial bonding strength to above 2.5 MPa (about 1.2 MPa in traditional processes); adjusts construction parameters in real time based on environmental parameters to achieve precise control of the entire process, reducing the hollowing rate to below 0.1%; combines the stress release layer with the phase change material to effectively alleviate the internal stress concentration problem caused by changes in temperature and humidity; and uses LIBS technology to achieve non-destructive testing of interfacial bonding quality, breaking through the limitations of traditional manual tapping testing.

[0049] According to third-party testing, the bonding strength of the wall constructed using this process reaches 2.8MPa, it can withstand 50 temperature cycles (-20℃~80℃) without hollowing, and it can withstand 3000 hours of heat and humidity aging (temperature 50℃, humidity 95%) without cracking. The comprehensive performance is significantly better than the existing national standard (GB / T9756-2018).

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0051] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A process for applying indoor latex paint to eliminate the hidden danger of hollowing on wall surfaces, characterized in that: The following steps are included in sequence: Step S1. Construction preparation: Use high-precision scanning equipment to build a three-dimensional digital model of the wall, use a multi-parameter detector to collect wall data, and plan the robot arm path in combination with the building structure; prepare a variety of materials required for construction, including specific high-pressure water jets and supporting solutions for base layer treatment, specific materials and mixing equipment for stress release layers, standard latex paints and additives, and specific interface enhancers for quality control; debug relevant construction equipment and connect quality inspection equipment to the control system. Step S2. Base treatment: honeycomb micro-etching is performed on the wall surface using a high-pressure water jet at a pressure of 20-30 MPa and a nozzle at a rotation speed of 1500-2500 rpm, followed by spraying a nano-scale silane coupling agent solution at a pressure of 0.2-0.3 MPa. Step S3. Construction of stress release layer: first spray the modified epoxy resin emulsion at a pressure of 0.3-0.4 MPa, then scrape on the evenly stirred two-component phase change wet putty and polish. Step S4. Intelligent painting: The multi-spectral detector at the end of the robotic arm collects wall data, and the control system adjusts the latex paint formula and the pressure of the spraying device accordingly. The robotic arm sprays according to the planned path. Step S5. Quality control: Before the coating cures, the wall coating is inspected using laser-induced breakdown spectroscopy equipment. Suspicious areas are re-coated with an interface enhancer, and quality data throughout the construction process is recorded and analyzed. Step S6. Finishing work: After the construction is completed, conduct a comprehensive inspection of the wall surface, clean up the construction site, deliver the wall surface, and provide after-sales service and return visits.

2. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S1, the high-precision scanning equipment is a three-dimensional laser scanner with millimeter-level accuracy, and the multi-parameter detector is a multi-spectral detector with a humidity measurement accuracy of ±1% RH, a temperature measurement accuracy of ±0.5°C, and the ability to accurately obtain Ra values ​​to measure roughness.

3. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S1, the high-pressure water jet used for base treatment is equipped with a rotating nozzle, and its spray angle and aperture are set according to preset settings, which can form a uniform honeycomb micro-etching effect on the wall surface, and the high-pressure water jet pressure is ≥20MPa.

4. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S2, the nano-scale silane coupling agent solution contains γ-aminopropyltriethoxysilane and nano-silicon dioxide dispersion, and has a solid content of 3-5%.

5. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S3, the elastic modulus of the modified epoxy resin emulsion is ≤150 MPa and the elongation at break is ≥800%.

6. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S3, the two-component phase change moisture-adjusting putty contains phase change material particles with a particle size between 10-20 μm and a proportion of 5-10%, and corresponding mixing equipment.

7. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S4, the multi-spectral detector and spraying device carried by the end of the robotic arm can work together to realize real-time data collection of the wall and precise spraying of latex paint, and the pressure of the spraying device can be accurately adjusted between 0.3-0.6MPa.

8. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S5, the laser-induced breakdown spectroscopy equipment can accurately detect the diffusion of interface elements before the coating is cured, providing data support for quality control.

9. The indoor latex paint painting process for eliminating the hidden danger of wall hollowing according to claim 1, characterized in that: In step S5, the interface enhancer contains 0.1-0.3% graphene nanosheets.

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