3D printing fair-faced breast board formwork structure and forming construction process

Abstract

The invention discloses a 3D printing fair-faced breast board formwork structure and a forming construction process, and relates to the technical field of building construction, the 3D printing fair-faced breast board formwork structure comprises an inner side formwork assembly, the formwork structure is composed of the inner side formwork assembly, an outer side formwork assembly and a wood formwork, and the inner side formwork assembly, the outer side formwork assembly and the wood formwork define a closed pouring cavity used for pouring a fair-faced breast board. The fair-faced breast board formwork is manufactured through the 3D printing technology, parametric modeling and block design are combined, high-precision forming of the formwork is achieved, especially accurate matching of the inner side formwork assembly and the outer side formwork assembly and the connecting modes of mortise and tenon joints, bolts and the like are achieved, the number of joints is effectively reduced, the formwork assembling precision is improved, and the production efficiency is improved. For special-shaped breast boards such as arc-shaped breast boards and hollowed-out breast boards, templates with complex shapes can be directly generated by means of 3D printing, customized manual processing is not needed, the processing cost is reduced, the manufacturing period is shortened, the template turnover rate is high, thermoplastic plastic materials can be recycled 10-15 times, wood consumption is reduced by 70% or above, and the requirement for green construction is met.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a 3D printed fair-faced concrete balustrade template structure and its molding and construction process. Background Technology

[0002] In building construction, wooden or steel molds are often used to form fair-faced concrete parapets. However, existing technologies have many problems. Wooden and steel molds have defects such as many joints and low precision, which can easily lead to quality problems such as honeycomb surface and misaligned joints on the concrete surface. For parapets with complex shapes, customized templates are required, which not only has high labor processing costs but also a long production cycle, seriously affecting the construction progress. At the same time, traditional templates have low turnover rates and consume a lot of wood, which does not meet the requirements of green construction. In addition, the smoothness of the concrete surface depends on the later grinding, which not only increases labor costs but also damages the concrete structure itself.

[0003] Existing solutions also have obvious shortcomings. Traditional templates cannot achieve millimeter-level precision control, making it difficult to meet the "no decoration" requirement of fair-faced concrete. For irregularly shaped panels such as curved and hollow ones, construction is difficult, the shape reproduction is low, and the design intent cannot be well reflected. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a 3D printed fair-faced concrete panel template structure and molding construction process to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a 3D printed fair-faced concrete slab template structure, including an inner template assembly, wherein the template structure is composed of an inner template assembly, an outer template assembly and a wooden template, the three of which enclose a closed casting cavity for casting fair-faced concrete slabs;

[0006] The inner template components and the outer template components are set in parallel and opposite directions, with a spacing equal to the design thickness of the parapet. The wooden template covers the top of both to form a closed structure. The inner template components are attached to the bottom surface of the wooden template through the bottom bonding plate, and the outer template components are attached to the top surface of the wooden template through the top bonding plate.

[0007] Specifically, the inner template component includes an inner template body and a bottom bonding plate. The inner template body has an arc-shaped curved surface structure with a curvature radius of 300mm. It is 3D printed as a single piece with the bottom bonding plate, and the verticality error is ≤1mm.

[0008] The laser-engraved micro-convex texture on the inner surface of the inner template component has a depth of 0.3mm and a roughness Ra=1.4μm, which can directly give the concrete surface a wood grain decorative effect. The fluorosilane release agent sprayed on the outer side has a contact angle of 112° to reduce demolding resistance.

[0009] The U-shaped positioning groove inside the casting cavity has a width of 20mm±0.5mm and is used to precisely fix the position of the reinforcing bars.

[0010] The outer template assembly includes a vertical plate and a top bonding plate. The vertical plate is arranged parallel to the inner template assembly. The bottom of the vertical plate is connected to an integrally printed top bonding plate. The edge of the top bonding plate has bolt holes with a diameter of 12mm. It can be detachably fixed to the wooden template by fastening bolts. The distance from the bolt holes to the edge is ≥50mm.

[0011] The rubber strip is embedded in the groove between the top bonding board and the wooden template. The groove depth is 2mm and the rubber strip compression is 12%, which is used to seal the joint.

[0012] The sides of adjacent inner and outer template components are connected by a male and female groove tenon joint. After the male groove is embedded into the female groove, it is sealed by a silicone sealing sheet. In the male and female groove structure of the sides of adjacent inner and outer template components, the male groove size is 20mm×5mm, the female groove size is 20.3mm×5.2mm, the tolerance is +0.3 / 0.2mm, and the silicone sealing sheet at the joint has a cross section of 8mm×8mm and a compression amount of 12%.

[0013] The outer template assembly and the wooden template are detachably fixed by fastening bolts that penetrate the top bonding plate. Rubber strips are embedded on the contact surface of the two. The outer side of the inner template assembly has an integrally formed reinforcing component, and scaffolding steel pipes are inserted into the reserved groove to achieve overall reinforcement.

[0014] The reinforcing components are symmetrically distributed on the inner side of the inner template body, 150mm from the top and bottom edges, with a cross-sectional size of 50mm×30mm. They are integrally formed with the inner template body by 3D printing. The spacing between adjacent reinforcing components is 250mm, and the reinforcing components are provided with reserved grooves with a width of 50mm for inserting scaffolding steel pipes to achieve overall reinforcement.

[0015] The inner template component has a U-shaped positioning slot on the inside to accurately fix the position of the steel bars. The inner surface is laser-engraved with micro-convex texture to achieve a concrete decorative effect. The outer side is sprayed with fluorosilane release agent to reduce demolding resistance. The template structure is formed by 3D printing to meet the stiffness requirement of elastic modulus ≥1500MPa during pouring, and can realize one-time molding of irregular shaped parapets with curvature radius ≥200mm.

[0016] The template structure is formed using the FDM process in 3D printing. The printing parameters are: nozzle temperature 230℃, printing speed 40mm / s, reinforcing component infill rate 70%, and infill rate of other parts 40%. After printing, it is subjected to hot pressing and leveling treatment at 120℃ and 0.5MPa pressure for 10 minutes. The flatness error of the joint surface between the inner and outer template components is ≤0.2mm.

[0017] A molding and construction process for a 3D-printed fair-faced concrete balustrade template structure includes the following steps:

[0018] S1: Template assembly. After cleaning the base layer, mark the installation positioning lines. Verify the error using a total station to ensure it is ≤2mm. Ensure the bottom bonding plate is in contact with the base layer with a gap of ≤1mm. Connect adjacent inner and outer template components using mortise and tenon joints. Compress the silicone sealant at the joint by 12%. Fix the outer template component to the wooden template with bolts, tightening to a torque of 30N·m. Then, insert Φ48 scaffolding steel pipes into the reserved slots of the reinforcing components at a horizontal spacing of 1.5m. Weld one end of the diagonal brace to the steel pipe and bolt the other end to the embedded parts in the ground. The angle of the diagonal brace is 45°±5°.

[0019] S2: Precise positioning of reinforcing bars: embed the longitudinal reinforcing bars into the U-shaped positioning slots of the inner formwork components. The bottom depth of the slot is 35.5mm and the side depth is 30.5mm. The gap between the reinforcing bars and the inner wall of the slot is ≤0.5mm. The intersection of the stirrups and the longitudinal reinforcing bars is wrapped with 22# galvanized wire in double loops with a wrapping length ≥100mm and the tail end is bent inward to ensure that the thickness deviation of the protective layer is ≤3mm.

[0020] S3: Concrete pouring and monitoring. Self-compacting concrete with a slump expansion of 680mm is poured from the top opening of the pouring cavity. Each layer is ≤400mm high, and the interval between pouring layers is ≤30min. A Φ30mm vibrator is inserted vertically along the preset guide hole of the inner template component at a spacing of 300mm. The vibration depth is 50mm above the bottom of the layer, and the time is 18s / point. At the same time, the pouring pressure (threshold 0.2MPa) and temperature field (temperature difference ≤25℃) are monitored in real time through fiber optic strain sensors embedded at the connection nodes between the reinforcing component and the inner template body.

[0021] S4: Demolding. 48 hours after pouring, when the concrete strength is ≥75%, first loosen the fastening bolts to a torque of 5 N·m, then use a special pry bar to gently pry the disassembly groove of the inner template assembly to separate the male and female grooves.

[0022] S5: Maintenance. Install the automatic spray nozzles on the top bracket of the outer template assembly with a nozzle spacing of 500mm and a distance of 300mm from the surface of the railing. Use intermittent spraying mode, starting for 15 minutes and stopping for 45 minutes. Monitor the humidity sensor to ensure that the surface humidity of the railing is ≥92%. Continue maintenance for 14 days.

[0023] In summary, the present invention has the following main advantages: By using 3D printing technology to produce fair-faced concrete balustrade templates, combined with parametric modeling and block design, the present invention achieves high-precision molding of the templates. In particular, the precise matching of the inner and outer template components and the connection methods such as mortise and tenon joints and bolts effectively reduce the number of joints and improve the assembly accuracy of the templates. It solves the problems of honeycomb surface and misaligned joints on the concrete surface caused by the large number of joints and low precision of traditional wooden and steel templates. For irregularly shaped balustrades such as arcs and hollows, complex shape templates can be directly generated with the help of 3D printing, without the need for customized manual processing, reducing processing costs and shortening the production cycle. Moreover, the template has a high turnover rate, and the thermoplastic material can be recycled 10-15 times, reducing wood consumption by more than 70%, which meets the requirements of green construction. The pre-set micro-convex texture on the inner side of the template can directly give the concrete surface a decorative effect, eliminating the need for later plastering and painting processes, reducing costs by more than 30%, and avoiding the damage to the concrete structure caused by later grinding, meeting the "decoration-free" requirement of fair-faced concrete. It is superior to traditional template technology in terms of quality, efficiency, economy and environmental protection. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the overall assembled state of the present invention;

[0025] Figure 2 For the present invention Figure 1 Enlarged view of point A;

[0026] Figure 3 This is an enlarged exploded view of part of the structure of the present invention;

[0027] Figure 4 This is an enlarged schematic diagram of the structure of a single component of the present invention.

[0028] In the diagram: 1. Inner template assembly; 101. Inner template body; 102. Bottom bonding plate; 103. Pouring cavity; 104. Reinforcing component; 2. Outer template assembly; 201. Vertical plate; 202. Top bonding plate; 203. Rubber strip; 204. Fastening bolt; 3. Wooden template. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of the present invention will now be described.

[0031] Example 1

[0032] like Figure 1-4As shown, taking the construction of a fair-faced concrete barrier on a ramp of a traffic center garage as an example, the specific implementation method of the present invention is described in detail:

[0033] I. Template Design and Preparation

[0034] Step 1: Parametric Modeling and Modular Design

[0035] Based on the BIM model of the ramp (slope 12°, parapet height 900mm), 3D contour data was extracted. The template structure consists of an inner template component 1, an outer template component 2, and a wooden template 3, forming a spiral upward extending structure. The positions and connections of each component are as follows:

[0036] Inner formwork assembly 1: includes inner formwork body 101, bottom bonding plate 102 and pouring cavity 103. The inner formwork body 101 is an arc-shaped curved surface structure (curvature radius 300mm) and is vertically welded and fixed to the bottom bonding plate 102 (verticality error ≤1mm). The inner side of the pouring cavity 103 is provided with a U-shaped positioning groove (width 20mm±0.5mm) for precise positioning of the reinforcing bars.

[0037] Reinforcing component 104: Symmetrically distributed on the inner side of the inner template body 101 (150mm from the upper and lower edges), with a cross-sectional size of 50mm×30mm, and integrally formed with the inner template body 101 by 3D printing, with a spacing of 250mm between adjacent reinforcing components;

[0038] Outer template assembly 2: includes a vertical plate 201, a top bonding plate 202 and fastening bolts 204. The vertical plate 201 is set parallel to the inner template assembly 1 (the spacing is equal to the thickness of the parapet). The bottom of the vertical plate 201 is connected to an integrally printed top bonding plate 202. Bolt holes (12mm in diameter) are opened on the edge of the top bonding plate 202, and it is fixed to the wooden template 3 by fastening bolts 204.

[0039] Rubber strip 203: It is embedded in the groove between the top bonding plate 202 and the wooden template 3 (groove depth 2mm), with a compression of 12%, to achieve joint sealing;

[0040] Surface treatment: The inner side of the inner template body 101 is laser-engraved with micro-raised wood grain texture (depth 0.3mm, Ra=1.4μm), and the outer side is sprayed with fluorosilane release agent (contact angle 112°); the curvature compensation coefficient k=1.03 is applied to generate the printing model to eliminate 0.5mm shrinkage error;

[0041] Step 2: 3D Printing and Post-processing

[0042] A large-format FDM industrial printer (model: CreatBotD600Pro) was used, with the following printing parameters: nozzle temperature 230℃, printing speed 40mm / s, 70% fill rate for reinforcing component 104, and 40% fill rate for the remaining parts; post-processing involved hot pressing at 120℃ (pressure 0.5MPa for 10 minutes) to ensure that the flatness error of the mating surface between the inner template component 1 and the outer template component 2 was ≤0.2mm.

[0043] II. On-site construction process

[0044] Step 1: Template assembly (double control of tenon and bolt)

[0045] Basic positioning: After cleaning the base layer, mark the installation positioning line. Verify the error with a total station to be ≤2mm. The bottom bonding plate 102 should be in contact with the base layer (gap ≤1mm).

[0046] Mortise and tenon connection: The sides of adjacent inner template components 1 are provided with male and female groove structures (male groove size 20mm×5mm, female groove size 20.3mm×5.2mm, tolerance +0.3 / 0.2mm). After the male groove is inserted into the female groove, the silicone sealing sheet (section 8mm×8mm) at the joint is compressed by 12%.

[0047] Bolt fixing: The top bonding plate 202 of the outer template assembly 2 is connected to the wooden template 3 by M10 fastening bolts 204 (the distance between the bolt hole and the edge is 50mm to prevent edge cracking), and the tightening torque is 30N·m;

[0048] Overall reinforcement: Φ48 scaffolding steel pipes are inserted into the reserved slots of reinforcing component 104 (slot width 50mm) with a horizontal spacing of 1.5m. One end of the diagonal brace is welded to the steel pipe, and the other end is bolted to the ground embedded part (diagonal brace angle 45°±5°).

[0049] Step 2: Precise positioning of reinforcing bars

[0050] The longitudinal reinforcing bars are embedded in the U-shaped positioning slots in the pouring cavity 103 of the inner template assembly 1 (slot depth: 35.5mm at the bottom and 30.5mm on the side, including a 0.5mm allowance), and the gap between the reinforcing bars and the inner wall of the slot is ≤0.5mm;

[0051] At the intersection of the stirrups and longitudinal reinforcement bars, double-loop 22# galvanized wire is used (winding length ≥ 100mm), with the tail end bent inward (to avoid puncturing the formwork), and the protective layer thickness deviation is ≤ 3mm.

[0052] Step 3: Concrete Pouring and Monitoring

[0053] Sealing of the pouring cavity: The bottom structure of the inner template assembly 1 is U-shaped and integrally printed. A rubber strip 203 is set between the top bonding plate 202 and the wooden template 3 to ensure that the pouring cavity 103 is leak-free.

[0054] Layered pouring: Self-compacting concrete (slump spread 680mm) is poured in from the top opening of the pouring cavity 103, with each layer ≤400mm in height and the interval between pouring layers ≤30min;

[0055] Vibration control: Insert a Φ30mm vibrator vertically along the preset guide hole (300mm spacing) of the inner template assembly 1, and vibrate to a depth of 50mm above the bottom of the layer, for a time of 18s / point;

[0056] Sensor arrangement: Fiber optic strain sensors (model: FBGSF01) are pre-embedded at the connection node between the reinforcing component 104 and the inner template body 101. The sampling line is laid along the outer groove of the template (groove depth 10mm) to monitor the pouring pressure (threshold 0.2MPa) and temperature field (temperature difference ≤25℃) in real time.

[0057] Step 4: Demolding and Curing

[0058] Demolding sequence: First loosen the fastening bolt 204 (torque reduced to 5 N·m), then insert a special pry bar into the disassembly groove (20 mm wide) of the inner template assembly 1 and gently pry to separate the male and female grooves (it is strictly forbidden to pry the surface of the inner template body 101).

[0059] Maintenance system: Automatic spray nozzles (500mm spacing) are installed on the top bracket of the outer template assembly 2, with the nozzles facing the surface of the fence (300mm distance), spraying intermittently (15min on / 45min off), and humidity sensors are attached to the surface of the fence (2m spacing between monitoring points) to ensure humidity ≥92%;

[0060] III. Quality Acceptance and Benefit Analysis

[0061] After the parapet is formed, the inner template component 1 has a fit of ≥99% with the concrete surface, a surface texture reproduction of 96%, a flatness of 2.5mm / 2m, and a verticality of 1.8mm / 2m.

[0062] Compared with traditional steel formwork, the formwork installation efficiency is increased by 2.5 times, timber consumption is reduced by 72%, and the overall cost is reduced by 32%.

[0063] This invention achieves integrated molding of clear water panels through precise positioning and reliable connection of components, solving the problems of joint defects and insufficient precision in traditional processes.

[0064] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A 3D printed fair-faced concrete panel template structure, comprising an inner template assembly (1), characterized in that: The template structure consists of an inner template assembly (1), an outer template assembly (2), and a wooden template (3), which together form a closed pouring cavity (103) for pouring clear water parapets. The inner template assembly (1) and the outer template assembly (2) are set in parallel opposite directions with a spacing equal to the design thickness of the parapet. The wooden template (3) covers the top of both to form a closed structure. The inner template assembly (1) is attached to the bottom surface of the wooden template (3) through the bottom bonding plate (102), and the outer template assembly (2) is attached to the top surface of the wooden template (3) through the top bonding plate (202). The sides of the adjacent inner template assembly (1) and outer template assembly (2) are connected by male and female groove tenon and mortise. After the male groove is embedded in the female groove, it is sealed by silicone sealing sheet. The outer template assembly (2) and the wooden template (3) are detachably fixed by fastening bolts (204) that penetrate the top bonding plate (202). Rubber strips (203) are embedded on the contact surface of the two. The outer side of the inner template assembly (1) is integrally formed with a reinforcing component (104), and scaffolding steel pipes are inserted in the reserved groove to achieve overall reinforcement. The inner template component (1) has a U-shaped positioning slot on the inner side to accurately fix the position of the steel bar. The inner surface is laser-engraved with micro-convex texture to achieve the effect of concrete decoration. The outer side is sprayed with fluorosilane release agent to reduce demolding resistance. The template structure is formed by 3D printing to meet the stiffness requirement of elastic modulus ≥1500MPa during pouring, and can realize the one-time molding of irregular balustrade with curvature radius ≥200mm.

2. The 3D printed clear water panel template structure according to claim 1, characterized in that: The inner template assembly (1) includes an inner template body (101) and a bottom bonding plate (102). The inner template body (101) is an arc-shaped curved surface structure with a radius of curvature of 300mm. It is 3D printed integrally with the bottom bonding plate (102) and the verticality error is ≤1mm. The U-shaped positioning groove inside the casting cavity (103) has a width of 20mm±0.5mm and is used to precisely fix the position of the reinforcing bars.

3. The 3D printed clear water panel template structure according to claim 1, characterized in that: The reinforcing components (104) are symmetrically distributed on the inner side of the inner template body (101), 150mm from the upper and lower edges, with a cross-sectional size of 50mm×30mm. They are integrally formed with the inner template body (101) by 3D printing. The spacing between adjacent reinforcing components (104) is 250mm, and the reinforcing components (104) are provided with reserved grooves with a width of 50mm for inserting scaffolding steel pipes to achieve overall reinforcement.

4. The 3D printed clear water panel template structure according to claim 1, characterized in that: The outer template assembly (2) includes a vertical plate (201) and a top bonding plate (202). The vertical plate (201) is arranged parallel to the inner template assembly (1). The bottom of the vertical plate (201) is connected to an integrally printed top bonding plate (202). The edge of the top bonding plate (202) is provided with bolt holes with a diameter of 12mm. It can be detachably fixed to the wooden template (3) by fastening bolts (204). The distance from the bolt hole to the edge is ≥50mm.

5. The 3D printed clear water panel template structure according to claim 1, characterized in that: The rubber strip (203) is embedded in the groove between the top bonding plate (202) and the wooden template (3). The groove depth is 2mm, and the compression of the rubber strip (203) is 12%, which is used to achieve joint sealing.

6. The 3D printed clear water panel template structure according to claim 1, characterized in that: The inner surface of the inner template assembly (1) is laser-engraved with a micro-convex texture depth of 0.3 mm and a roughness Ra = 1.4 μm, which can directly give the concrete surface a wood grain decorative effect. The fluorosilane release agent sprayed on the outer side has a contact angle of 112° to reduce the demolding resistance.

7. The 3D printed clear water panel template structure according to claim 1, characterized in that: The template structure is formed by FDM process in 3D printing. The printing parameters are nozzle temperature 230℃, printing speed 40mm / s, filling rate of reinforcing component (104) 70%, filling rate of other parts 40%, and after printing, it is subjected to hot pressing and leveling treatment at 120℃ and 0.5MPa pressure for 10min. The flatness error of the joint surface between the inner template component (1) and the outer template component (2) is ≤0.2mm.

8. The 3D printed clear water panel template structure according to claim 1, characterized in that: In the male and female groove structures on the sides of the adjacent inner template assembly (1) and outer template assembly (2), the male groove size is 20mm×5mm, the female groove size is 20.3mm×5.2mm, the tolerance is +0.3 / 0.2mm, the cross section of the silicone sealing sheet at the joint is 8mm×8mm, and the compression amount is 12%.

9. A molding and construction process for a 3D-printed fair-faced concrete balustrade template structure, characterized in that... Construction using the 3D-printed fair-faced concrete slab template structure described in any one of claims 1-8 includes the following steps: S1: Template assembly, after cleaning the base layer, mark the installation positioning line, and verify the error ≤2mm with a total station to make the bottom bonding plate (102) fit with the base layer with a gap ≤1mm. Connect the adjacent inner template components (1) and outer template components (2) with male and female groove tenon and mortise joints. Compress the silicone sealing sheet at the joint by 12%. Fix the outer template components (2) and wooden templates (3) with fastening bolts (204) with a tightening torque of 30N·m. Then insert Φ48 scaffold steel pipes into the reserved grooves of the reinforcing components (104) with a horizontal spacing of 1.5m. Weld one end of the diagonal brace to the steel pipe and the other end to the ground embedded parts with bolts. The angle of the diagonal brace is 45°±5°. S2: Reinforcing bar precise positioning, embed the longitudinal reinforcing bar into the U-shaped positioning slot of the inner template component (1), the bottom depth of the slot is 35.5mm and the side depth is 30.5mm, the gap between the reinforcing bar and the inner wall of the slot is ≤0.5mm, the intersection of the stirrup and the longitudinal reinforcing bar is wrapped with 22# galvanized wire in double loops, the wrapping length is ≥100mm, and the tail end is bent inward to ensure that the thickness deviation of the protective layer is ≤3mm; S3: Concrete pouring and monitoring. Self-compacting concrete with a slump expansion of 680mm is poured from the top opening of the pouring cavity (103). The height of each layer is ≤400mm, and the pouring interval between upper and lower layers is ≤30min. A Φ30mm vibrator is inserted vertically along the preset guide hole of the inner template assembly (1) at a spacing of 300mm. The vibration depth is 50mm above the bottom of the layer, and the time is 18s / point. At the same time, the pouring pressure (threshold 0.2MPa) and temperature field (temperature difference ≤25℃) are monitored in real time through the fiber optic strain sensor embedded at the connection node between the reinforcing component (104) and the inner template body (101). S4: Demolding. 48 hours after pouring, when the concrete strength is ≥75%, first loosen the fastening bolts (204) to a torque of 5 N·m, then use a special pry bar to insert into the disassembly groove of the inner template assembly (1) and gently pry to separate the male and female grooves. S5: Maintenance, install the automatic spray nozzles on the top bracket of the outer template assembly (2), with a nozzle spacing of 500mm and a distance of 300mm from the surface of the railing. Use intermittent spraying, start for 15min / stop for 45min, and monitor the surface humidity of the railing with a humidity sensor to ensure that the humidity is ≥92%. Continue maintenance for 14 days.

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