Novel energy-saving and environment-friendly wooden door UV roller coating method with heat preservation and insulation functions

Abstract

The invention relates to the technical field of wooden door manufacturing, and discloses a thermal insulation novel energy-saving environment-friendly wooden door UV roller coating method which comprises the steps of wooden door base material preparation, primer coating, UV curing, thermal insulation material coating, UV paint coating, preheating treatment, secondary UV curing and inspection. According to the novel energy-saving environment-friendly wooden door UV roller coating method with the heat preservation and insulation functions, the UV roller coating machine and the UV curing equipment are adopted, rapid and uniform coating and curing of the coating are achieved, the production period is greatly shortened, the production efficiency is improved, the fluidity of the coating is further promoted through the preheating treatment step, the coating can be combined with a wooden door base material and a heat preservation and insulation material more easily, and the service life of the wooden door is prolonged. The waiting time in the coating process is shortened, the heat preservation and insulation performance of the wooden door is remarkably improved by adding the heat preservation and insulation layer, the wooden door can keep the indoor temperature in winter, and energy consumption is reduced; in summer, external heat can be effectively prevented from entering a room, and the living comfort is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wooden door manufacturing, in particular to a thermal insulation, novel energy-saving and environment-friendly UV roller coating method for wooden doors. Background Art

[0002] Ultraviolet light (UV) curing utilizes the photosensitivity of photoinitiators to form excited ecological molecules under ultraviolet light, decompose them into free radicals or ions, and cause unsaturated organic matter to undergo chemical reactions such as polymerization, contact, and cross-linking to achieve the purpose of curing. This technology is widely used in the painting process of wooden doors due to its significant advantages such as fast drying speed, low operating cost, and high product quality.

[0003] Traditional wooden doors are usually treated with solvent-based paints during the manufacturing process, which not only pollutes the environment, but also has problems such as high energy consumption and low production efficiency. With the increasing awareness of environmental protection and the rise in energy costs, it is particularly important to develop an efficient and environmentally friendly surface treatment method for wooden doors. UV roller coating technology is increasingly used in wooden door manufacturing due to its advantages such as fast curing, low VOC emissions, environmental protection and energy saving. However, how to achieve efficient and environmentally friendly UV roller coating while ensuring the thermal insulation performance of wooden doors is still a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of thermal insulation, energy-saving and environmentally friendly UV roller coating method for wooden doors, which can not only improve the thermal insulation performance of the wooden doors, but also significantly reduce energy consumption and environmental pollution.

[0005] The present invention provides the following technical solution: a thermal insulation, new energy-saving and environmentally friendly UV roller coating method for wooden doors, comprising the following steps:

[0006] S1: Prepare the wooden door substrate, clean, dust and sand the surface of the wooden door to ensure that the surface of the wooden door is flat and free of impurities;

[0007] S2: Primer coating: Use environmentally friendly UV primer and apply it evenly on the surface of the wooden door through a UV roller coater to form a uniform primer film;

[0008] S3: UV curing, the wooden door coated with primer is sent into the UV curing equipment for rapid curing treatment to make the primer film dry quickly;

[0009] S4: Apply thermal insulation material. After the primer film is dry, spray the thermal insulation layer on the surface of the wooden door. After the thermal insulation layer is cured, cover it with a thin plate to form a thermal insulation layer.

[0010] S5: UV coating: after the thermal insulation layer is formed, UV coating is used to evenly coat the surface of the wooden door again by UV roller coating machine;

[0011] S6: Preheating treatment, sending the wooden door substrate coated with UV coating into the preheating device to improve the fluidity of the UV coating and promote its combination with the thermal insulation material;

[0012] S7: UV curing again, sending the wooden door coated with UV coating into the UV curing equipment for secondary curing treatment, so that the environmentally friendly UV coating is completely dry and has excellent weather resistance and decorative properties;

[0013] S8: Inspection: inspect the quality of the wooden door after curing to ensure that its thermal insulation performance and surface quality meet the requirements.

[0014] Preferably, in step S1, before surface cleaning, dust removal and sanding of the wooden door, ensure that the surface of the wooden door substrate is completely dry to avoid residual moisture affecting the adhesion of subsequent coatings, and then use professional equipment to clean, dust and sand the surface.

[0015] Preferably, the UV roller coater in step S2 and step S5 uses a roller made of special material, which has the characteristics of wear resistance, corrosion resistance, and paint resistance, thereby ensuring the coating quality.

[0016] Preferably, the UV curing equipment in steps S3 and S7 adopts an energy-efficient LED UV light source, which has the characteristics of fast curing speed, low energy consumption, environmental protection and no pollution. The power of each lamp tube is 50-300 watts, and the irradiation time is 1 to 5 seconds.

[0017] Preferably, the material of the thermal insulation layer in step S4 is one of polyurethane foam, aluminum silicate fiber or aerogel.

[0018] Preferably, the UV coating in step S5 is a solvent-free UV coating, the main components of which include epoxy acrylate, polyurethane acrylate, a photoinitiator and an auxiliary agent.

[0019] Preferably, in the step S5, the wooden door substrate coated with the thermal insulation layer is fed into a UV roller coater, the line speed is adjusted to 20 m / min, and the coating amount is 140-320 g / m2 to ensure that the UV coating is evenly covered on the surface of the thermal insulation layer.

[0020] Preferably, in step S6, the UV coating needs to be preheated before re-curing, the preheating temperature is 40-60 degrees Celsius, and the preheating time is 1 to 3 minutes.

[0021] Preferably, the quality inspection in step S8 includes a thermal insulation performance test and a surface hardness test to ensure that its various indicators meet the standards.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0023] First, the present invention adopts UV roller coater and UV curing equipment to achieve rapid and uniform coating and curing of the paint, greatly shortening the production cycle and improving production efficiency. The preheating treatment step further promotes the fluidity of the paint, making it easier for the paint to combine with the wooden door substrate and thermal insulation materials, reducing the waiting time during the coating process. The addition of thermal insulation layer significantly improves the thermal insulation performance of the wooden door, allowing the wooden door to maintain indoor temperature in winter and reduce energy consumption; in summer, it can effectively block external heat from entering the room and improve living comfort.

[0024] Second, the UV coating and thermal insulation materials used in the present invention are environmentally friendly materials that meet the requirements of modern green manufacturing. The UV curing equipment adopts an efficient and energy-saving LED UV light source, which has low energy consumption and is environmentally friendly and pollution-free, reducing energy consumption and environmental burden in the production process.

[0025] Second, the surface cleaning, dust removal and sanding steps ensure the flatness and impurity-free surface of the wooden door substrate, laying a good foundation for the subsequent painting and curing process. The special roller material and precise coating amount control ensure the uniform coverage of the paint on the wooden door surface, improving the overall aesthetics and decorativeness of the product. The preheating treatment and secondary curing treatment further enhance the adhesion, hardness and weather resistance of the coating, making the wooden door more durable during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0027] Figure 2 A schematic diagram of the process of preparing a wooden door substrate for the present invention;

[0028] Figure 3 This is a schematic diagram of the primer coating and UV curing process of the present invention;

[0029] Figure 4 This is a schematic diagram of the process of coating thermal insulation materials according to the present invention;

[0030] Figure 5 This is a schematic diagram of the UV coating process of the present invention;

[0031] Figure 6 This is a schematic diagram of the preheating process and re-curing process of the present invention;

[0032] Figure 7 It is a schematic diagram of the inspection process of the present invention. DETAILED DESCRIPTION

[0033] 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.

[0034] The present invention provides the following technical solutions:

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 A new type of thermal insulation, energy-saving and environmentally friendly UV roller coating method for wooden doors comprises the following steps:

[0036] S1: Prepare the wooden door substrate, clean, dust and sand the surface of the wooden door to ensure that the surface of the wooden door is flat and free of impurities;

[0037] In step S1, before cleaning, dusting and sanding the wooden door, ensure that the surface of the wooden door substrate is completely dry to avoid residual moisture affecting the adhesion of subsequent coatings, and then use professional equipment to clean, dust and sand the surface.

[0038] Through the above technical solution, first of all, ensure that the surface of the wooden door substrate is completely dry, which is a crucial step, because any residual moisture may affect the adhesion of subsequent coatings (such as primer, UV coating, etc.), and then affect the firmness and durability of the entire coating. Next, use an industrial vacuum cleaner or a high-pressure air gun to deal with the dust, fine particles and impurities on the surface and gaps of the wooden door, and then use a sander to polish the surface of the wooden door to make it flat, smooth and free of impurities, providing a good foundation for subsequent painting.

[0039] S2: Primer coating: Use environmentally friendly UV primer and apply it evenly on the surface of the wooden door through a UV roller coater to form a uniform primer film;

[0040] The UV roller coating machine in step S2 and step S5 uses a roller made of special material, which has the characteristics of wear resistance, corrosion resistance, and paint resistance, thereby ensuring the coating quality.

[0041] Through the above technical scheme, an environmentally friendly UV primer is adopted and evenly applied to the surface of the wooden door by a UV roller coater to form a uniform and dense primer film. This primer film not only provides a good adhesion basis for subsequent coatings, but also enhances the overall aesthetics and durability of the wooden door. The UV roller coater is used in this step and the subsequent S5 step. Its roller is made of special materials and has the remarkable characteristics of wear resistance, corrosion resistance, and paint resistance. These characteristics ensure the uniform coating and high-quality completion of the primer during the coating process. The wear resistance enables the roller to maintain a good shape and precision after long-term use; the corrosion resistance ensures that the roller can operate stably in various environments and is not affected by corrosion; and the characteristic of paint resistance effectively avoids the paint film defects that may occur during the coating process, such as orange peel, sagging, etc., so that the primer coating is completed with high quality, laying a solid foundation for the quality of subsequent coatings and final products.

[0042] S3: UV curing, the wooden door coated with primer is sent into the UV curing equipment for rapid curing treatment to make the primer film dry quickly;

[0043] The UV curing equipment in steps S3 and S7 uses an energy-efficient LED UV light source, which has the characteristics of fast curing speed, low energy consumption, environmental protection and no pollution. The power of each lamp tube is 50-300 watts, and the irradiation time is 1 to 5 seconds.

[0044] Through the above technical scheme, the wooden door coated with primer is sent to the UV curing equipment for rapid curing treatment. The UV curing equipment is used in this step and the subsequent S7 step, and adopts an efficient and energy-saving LED UV light source. This light source has multiple advantages such as fast curing speed, low energy consumption, environmental protection and pollution-free. The power range of each lamp tube is between 50-300 watts, and the irradiation time is controlled within 1 to 5 seconds. This configuration ensures that the primer film can be quickly dried in a short time, thereby improving production efficiency and reducing energy consumption.

[0045] S4: Apply thermal insulation material. After the primer film is dry, spray the thermal insulation layer on the surface of the wooden door;

[0046] The material of the thermal insulation layer in step S4 is one of polyurethane foam, aluminum silicate fiber or aerogel.

[0047] Through the above technical scheme, after the primer film is dry, a thermal insulation layer is sprayed on the surface of the wooden door to improve the overall thermal insulation performance of the wooden door. Comprehensive consideration can be made based on the purpose of the wooden door, the use environment and the specific needs of the customer to make reasonable material selection. Among them, when polyurethane foam is selected as the thermal insulation material, a 2 mm thick layer of polyurethane foam is evenly coated on the wooden door substrate by spraying; when aluminum silicate fiber is selected as the thermal insulation material, a 3 mm thick layer of aluminum silicate fiber is evenly coated on the wooden door substrate by brushing; when aerogel is selected as the thermal insulation material, a 1.5 mm thick layer of aerogel is evenly coated on the wooden door substrate by spraying; when a thin plate is selected as the surface material as the thermal insulation layer panel, the thin plate is a natural veneer or technological veneer or fiberboard with a thickness of 1 mm.

[0048] S5: UV coating: after the thermal insulation layer is added and cured, UV coating is applied evenly to the surface of the wooden door again by a UV roller coater;

[0049] The UV coating in step S5 is a solvent-free UV coating, and its main components include epoxy acrylate, polyurethane acrylate, photoinitiator and additives.

[0050] In step S5, the wooden door substrate coated with the thermal insulation layer is fed into the UV roller coater, the line speed is adjusted to 20 m / min, and the coating amount is 200 g / m2 to ensure that the UV coating is evenly covered on the surface of the thermal insulation layer.

[0051] Through the above technical scheme, this step and step S2 use the same UV roller coater. When the thermal insulation layer is completely added and cured, a layer of beautiful, durable and protective coating is formed on the surface of the wooden door through the UV coating step. The UV coating is a solvent-free UV coating. This coating is environmentally friendly, efficient and energy-saving. Its main ingredients include epoxy acrylate, polyurethane acrylate, photoinitiator and additives. These ingredients can quickly undergo cross-linking reaction under UV light to form a hard and wear-resistant coating. During the coating process, the wooden door substrate coated with the thermal insulation layer is fed into the UV roller coater. By adjusting the line speed of the UV roller coater to 20 m / min and setting the coating amount to 140-320 g / m2, it is ensured that the UV coating can evenly cover the surface of the thermal insulation layer, while ensuring the uniformity and thickness of the coating, and also improving production efficiency; through the uniform coating of the UV roller coater, the UV coating can be tightly adhered to the surface of the thermal insulation layer to form a smooth and flat coating. This coating not only enhances the overall aesthetics of the wooden door, but also improves its physical properties such as wear resistance and scratch resistance. At the same time, due to the use of solvent-free UV coating, the entire coating process is more environmentally friendly and pollution-free.

[0052] S6: Preheating treatment, sending the wooden door substrate coated with UV coating into the preheating device to improve the fluidity of the UV coating and promote its combination with the thermal insulation material;

[0053] In step S6, the UV coating needs to be preheated before re-curing, the preheating temperature is 40-60 degrees Celsius, and the preheating time is 1 to 3 minutes.

[0054] Through the above technical scheme, before the wooden door substrate coated with UV paint is sent to the UV curing equipment, the fluidity of the UV paint is improved through preheating treatment, so that it can better penetrate into the tiny pores of the thermal insulation layer, thereby enhancing the bonding force between the paint and the thermal insulation material; the preheating treatment is achieved by sending the wooden door substrate coated with UV paint into a preheating device, wherein the preheating device can use infrared heating equipment or hot air circulation heating equipment according to specific circumstances. By setting the preheating temperature to 40-60 degrees Celsius, this temperature range will not cause the paint to cure prematurely, and can effectively improve Its fluidity, at the same time, the preheating time is controlled within 1 to 3 minutes to ensure that the paint is fully fluid and penetrated during the preheating process, but it will not cause drying or cracking on the coating surface due to too long a time. After preheating treatment, the bonding force between UV paint and thermal insulation material has been significantly improved, and the paint can adhere more closely to the surface of the thermal insulation layer to form a more solid and durable coating, which not only improves the overall performance of the wooden door, such as wear resistance, scratch resistance and aging resistance, but also ensures that the coating can maintain a good appearance and protective effect during long-term use.

[0055] S7: UV curing again, the wooden door coated with UV paint is sent to the UV curing equipment for secondary curing treatment, so that the environmentally friendly UV paint is completely dry and has excellent weather resistance and decorative properties.

[0056] Through the above technical scheme, this step uses the same UV curing equipment as S3 to perform secondary curing on the wooden door coated with UV paint after preheating, so that the paint is completely dry and endowed with excellent weather resistance and decorative properties. The photoinitiator in the paint is activated through the efficient and energy-saving LED UV light source. The photoinitiator undergoes a chemical reaction under the action of ultraviolet rays, initiating the cross-linking and curing of the paint molecules. During the curing process, the paint gradually changes from liquid to solid to form a hard, wear-resistant coating. The coating surface becomes smooth and flat, ensuring that the wooden door can be used for a long time in outdoor environments without fading or deformation, and has excellent weather resistance and decorative properties.

[0057] S8: Inspection: inspect the quality of the wooden door after curing to ensure that its thermal insulation performance and surface quality meet the requirements.

[0058] The quality inspection in step S8 includes thermal insulation performance test and surface hardness test to ensure that its various indicators meet the standards.

[0059] Through the above technical solution, the wooden doors are inspected after secondary curing. According to industry standards and customer needs, the qualified standards for thermal insulation performance are set, and professional thermal insulation performance testing instruments are used, such as thermal conductivity testers, thermal resistance testers, etc.; according to industry standards and customer needs, the qualified standards for surface hardness are set, and the thermal insulation performance of wooden doors is tested. The surface hardness of the wooden doors is tested using surface hardness testing instruments such as pencil hardness testers or scratch testers. Through strict thermal insulation performance tests and surface hardness tests, it can be ensured that the quality indicators of wooden doors meet the standards and requirements after UV coating and curing.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of thermal insulation, energy-saving and environmentally friendly UV roller coating method for wooden doors, characterized in that: The following steps are involved: S1: Prepare the wooden door substrate, clean, dust and sand the surface of the wooden door to ensure that the surface of the wooden door is flat and free of impurities; S2: Primer coating: Use environmentally friendly UV primer and apply it evenly on the surface of the wooden door through a UV roller coater to form a uniform primer film; S3: UV curing, the wooden door coated with primer is sent into the UV curing equipment for rapid curing treatment to make the primer film dry quickly; S4: Apply thermal insulation material. After the primer film is dry, spray the thermal insulation layer on the surface of the wooden door. After the thermal insulation layer is cured, cover it with a thin plate to form a thermal insulation layer. S5: UV coating: after the thermal insulation layer is formed, UV coating is used to evenly coat the surface of the wooden door again by UV roller coating machine; S6: Preheating treatment, sending the wooden door substrate coated with UV coating into the preheating device to improve the fluidity of the UV coating and promote its combination with the thermal insulation material; S7: UV curing again, sending the wooden door coated with UV coating into the UV curing equipment for secondary curing treatment, so that the environmentally friendly UV coating is completely dry and has excellent weather resistance and decorative properties; S8: Inspection: inspect the quality of the wooden door after curing to ensure that its thermal insulation performance and surface quality meet the requirements.

2. A thermal insulation, energy-saving and environmentally friendly UV roller coating method for wooden doors according to claim 1, characterized in that: In the step S1, before performing surface cleaning, dust removal and sanding on the wooden door, ensure that the surface of the wooden door substrate is completely dry to avoid residual moisture affecting the adhesion of the subsequent coating, and then perform surface cleaning, dust removal and sanding with professional equipment.

3. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: The UV roller coating machine in step S2 and step S5 uses rollers made of special materials, which have the characteristics of wear resistance, corrosion resistance, and paint resistance, thereby ensuring the coating quality.

4. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: The UV curing equipment in steps S3 and S7 adopts an energy-efficient LED UV light source, which has the characteristics of fast curing speed, low energy consumption, environmental protection and no pollution. The power of each lamp tube is 50-300 watts, and the irradiation time is 1 to 5 seconds.

5. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: The material of the thermal insulation layer in step S4 is one of polyurethane foam, aluminum silicate fiber or aerogel.

6. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: The UV coating in step S5 is a solvent-free UV coating, and its main components include epoxy acrylate, polyurethane acrylate, photoinitiator and auxiliary agent.

7. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: In the step S5, the wooden door substrate coated with the thermal insulation layer is fed into the UV roller coater, the line speed is adjusted to 20 m / min, and the coating amount is 140-320 g / m2 to ensure that the UV coating is evenly covered on the surface of the thermal insulation layer.

8. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: In step S6, the UV coating needs to be preheated before re-curing, the preheating temperature is 40-60 degrees Celsius, and the preheating time is 1-3 minutes.

9. The method for UV roller coating of a thermal insulation, new energy-saving and environmentally friendly wooden door according to claim 1 is characterized by: The quality inspection in step S8 includes thermal insulation performance test and surface hardness test to ensure that its various indicators meet the standards.

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