A composite structure cabinet door based on a same-color backboard substrate and a preparation method thereof

Abstract

The application discloses a composite structure modeling cabinet door based on a same-color backboard substrate and a preparation method thereof. The composite structure modeling cabinet door comprises a same-color backboard layer, an intermediate stabilizing layer and an inner layer plate layer arranged in sequence. The same-color backboard layer, the intermediate stabilizing layer and the inner layer plate layer are cold-pressed into an integral substrate through formaldehyde-free glue. The edge of the integral substrate is provided with an edge sealing processed by PUR glue. The preparation method comprises the following steps: pretreatment and cold-pressing of the integral substrate; opening, slitting and numerical control engraving; edge sealing treatment; precise assembly and cold-pressing curing. The same-color backboard layer with the same color and material as the cabinet body is directly used as the core surface substrate, the stability is enhanced through a composite cold-pressing structure, the formaldehyde-free glue cold-pressing process is used throughout the process, the three-dimensional modeling cabinet door is integrally formed, the glass door, the rattan door and other categories can be expanded and matched, the color of the cabinet door and the cabinet body is naturally unified, and the cost, the efficiency, the environmental protection and the product performance are considered.

Description

Technical Field

[0001] This invention relates to the field of customized home furnishing manufacturing technology, specifically to the structural design and production process of shaped cabinet doors for customized wardrobes, cabinets, bookcases, wine cabinets, etc., especially for low-cost, integrated processing technology for cabinet doors with three-dimensional shapes such as solid wood frames and simple European style. Background Technology

[0002] In the current custom home furnishing industry, cabinet doors with solid wood frames and simple European styles, featuring three-dimensional designs, are the mainstream high-end products. Existing production and surface color matching processes are mainly divided into three categories: Painted cabinet doors: using solid wood or MDF as the base material, after being shaped and carved, the surface effect and cabinet color are achieved through multiple layers of primer spraying, sanding, and topcoat baking. The process includes base material treatment, shaping, multiple coats of paint, constant temperature baking, fine sanding, etc., which rely on manual operation and special paint baking equipment.

[0003] PVC-coated cabinet doors: MDF or plywood are used as the base material. After shaping and processing, PVC film is hot-pressed over the door to achieve surface color matching and edge sealing. Specialized coating film and hot-pressing equipment are required, and the corresponding coating film model must be selected according to different cabinet colors.

[0004] Eco-board color matching frame cabinet doors: Eco-board is used as the frame material, and solid wood strips are spliced ​​together to form the cabinet. The cabinet body is matched with the color of the eco-board itself. The frame strips need to be processed separately and spliced ​​together. The complexity of the shape is limited by the characteristics of the board.

[0005] The existing technology has the following defects and shortcomings: 1. The color matching process is complicated and the color difference problem is prominent: the paint requires manual color matching, which is easily affected by the spraying thickness and baking temperature, resulting in color difference; PVC covering requires precise matching of film material color, with many inventory models and a high failure rate of color matching; the ecological board splicing frame is limited by the color of the board material, making it difficult to achieve perfect color matching between complex shapes and cabinets.

[0006] 2. High production costs and high material loss rate: Baking paint process consumes a lot of materials, and requires a large investment in labor and equipment. PVC coating requires the purchase of special film materials and auxiliary materials. Solid wood frame relies on solid wood raw materials, which are subject to large price fluctuations and high processing losses. At the same time, the inventory of multiple types of base materials ties up capital.

[0007] 3. Long production cycle and poor adaptability to large scale: Baking paint requires waiting for the paint to dry and cure, and the production cycle of a single cabinet door can be as long as several days; PVC coating and solid wood frame assembly processes are scattered, with a high degree of non-standardization and high requirements for workers' technical skills, making it difficult to adapt to the large-scale production needs of small batches and multiple styles of customized furniture.

[0008] 4. Insufficient product stability, prone to deformation and cracking: Solid wood framed cabinet doors are greatly affected by temperature and humidity, and are prone to warping, deformation and cracking; MDF substrate cabinet doors have weaker moisture resistance and structural strength, and are prone to problems such as broken lines and expansion of substrate after long-term use.

[0009] Limited environmental performance and high pollutant emissions: The baking paint process generates a large amount of volatile pollutants such as VOCs, and the adhesives used for PVC coating pose a risk of releasing formaldehyde and benzene compounds, which does not meet the modern consumer demand for green and environmentally friendly home furnishings. Summary of the Invention

[0010] The purpose of this invention is to provide a composite structure cabinet door based on a substrate with a matching back panel and its preparation method, so as to solve the problems of existing cabinet doors with decorative features in terms of color matching, cost, process, performance, and environmental protection.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a composite structure cabinet door based on a matching back panel substrate includes an intermediate stabilizing layer, a matching back panel layer on the outer side of the intermediate stabilizing layer, and an inner panel layer on the inner side of the intermediate stabilizing layer. The matching back panel layer, the intermediate stabilizing layer, and the inner panel layer are cold-pressed together with formaldehyde-free adhesive to form an integral substrate. The edges of the integral substrate are sealed with PUR adhesive.

[0012] As an improved technical solution, the same-color back panel layer adopts a custom-made home back panel that is completely the same color and material as the cabinet, with a thickness of 4.5-6mm.

[0013] As an improved technical solution, the intermediate stabilizing layer uses a Keding board with a thickness of 5-12mm.

[0014] As an improved technical solution, the inner layer is made of solid wood multilayer board.

[0015] As an improved technical solution, the integral substrate can be CNC engraved and slit to form the structural components of the cabinet door.

[0016] The method for preparing the above-mentioned composite structure cabinet door based on a matching back panel substrate includes the following steps: Step 1: Pre-treatment and cold pressing of the overall substrate; Select the intermediate stabilizing layer, the same color backing layer and the inner layer of the assembled substrate, apply adhesive to the bonding surfaces of the intermediate stabilizing layer, the same color backing layer and the inner layer, and then cold press the same color backing layer, the intermediate stabilizing layer and the inner layer together. Step 2, Slitting and CNC Engraving: According to the cabinet door design dimensions, the composite substrate is slitting into basic components such as frame strips, core boards, and shaped lines using a precision cutting machine. The slitting components are then fed into a CNC engraving machine to process shaped grooves, lines, and tenon / slot structures according to the preset drawings. At the same time, expansion structures such as glass inlay grooves and rattan inlay positions are reserved. Step 3, edge sealing treatment; all edges of the carved and cut parts are sealed with PUR hot melt adhesive.

[0017] Step 4, Precise assembly and cold pressing curing: Assemble and splice the cabinet door according to the cabinet door structure design, send the assembled cabinet door into the cold pressing equipment for cold pressing curing, and trim and finish the cabinet door.

[0018] As an improved technical solution, in step one, a 4.5-6mm thick back panel of the same color and batch as the cabinet is selected as the surface substrate, and matched with solid wood multilayer board and 5-12mm thick PVC board of the corresponding specifications.

[0019] In step one, the bonding surfaces of the same-color backing layer, the intermediate stabilizing layer and the inner layer are uniformly coated with environmentally friendly formaldehyde-free adhesive, with the coating amount controlled at 100-150g / ㎡.

[0020] In step one, the three-layer structure of the same color backing layer + the intermediate stabilizing layer + the inner layer is stacked in sequence and fed into a cold pressing equipment. The cold pressing pressure is 10-15MPa and the cold pressing time is 30-60min. It is cured and formed at room temperature. After cooling to room temperature, an integrated composite substrate is formed. The overall thickness of the substrate is controlled at 14.5-24mm according to the combination of the three materials.

[0021] As an improved technical solution, in step two, the cutting accuracy error of the precision cutting machine is ≤0.05mm, and the cut surface is flat without chipped edges; As an improved technical solution, in step three, the edge sealing pressure is controlled at 3-5 MPa, the edge sealing temperature is 180-200℃, and the edge sealing is cooled and shaped after sealing, and excess edge sealing material is removed.

[0022] As an improved technical solution, in step four, an environmentally friendly formaldehyde-free adhesive is applied to the splicing area, and a positioning clamp is used to fix it during the splicing process. If it is a glass door or a rattan door, the glass installation and rattan inlay processes are completed simultaneously. In step four, the cold pressing pressure is 8-12 MPa, and the cold pressing time is 40-70 min; In step four, the positioning fixture is removed, and the edges and joints of the cabinet door are finely trimmed to remove excess glue residue and edge burrs. The surface is then sanded smooth to complete the preparation of the overall cabinet door.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. Solve the color matching problem between cabinet doors and cabinet body from the source, completely eliminate color difference, and simplify the color matching process; 2. Reuse the cabinet's back panel of the same color as the core material to replace solid wood and special painted / wrapped materials, thereby reducing raw material and inventory costs; 3. Adopting a full cold-pressing process and a formaldehyde-free adhesive system simplifies the production process, shortens the production cycle, reduces labor and equipment investment, and is suitable for large-scale and flexible production of customized home furnishings; 4. The three-layer composite structure design enhances the cabinet door's resistance to deformation and cracking, thereby improving product stability and durability; 5. The PUR adhesive edge sealing process is adopted to improve the edge sealing and moisture resistance, while reducing high-pollution processes such as baking paint and PVC coating, thus improving the product's environmental performance and meeting household environmental protection standards. 6. Expand the product application scope to accommodate various customization needs, including glass doors, rattan doors, and decorative doors. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cabinet door structure from the main view direction of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-section structure at point AA; Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at point BB; In the diagram: 1. Backing layer of the same color, 2. Middle stabilizing layer, 3. Inner layer, 4. Edge sealing. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Reference Figures 1-3 As shown, a composite structure cabinet door based on a matching back panel substrate includes an intermediate stabilizing layer made of 5-12mm thick Keding board; a matching back panel layer is provided on the outer side of the intermediate stabilizing layer, which is a custom-made furniture back panel with the same color and material as the cabinet body and has a thickness of 4.5-6mm; an inner layer is provided on the inner side of the intermediate stabilizing layer, which is made of multi-layer solid wood board. The same-color back panel layer, the intermediate stabilizing layer, and the inner layer are cold-pressed together with formaldehyde-free adhesive to form a single substrate. The edges of the single substrate are sealed with PUR adhesive. The single substrate can be CNC engraved and slit to form the structural components of the cabinet door.

[0027] The method for preparing the above-mentioned composite structure cabinet door based on a matching back panel substrate includes the following steps: Step 1: Substrate pretreatment and composite cold pressing; (1) Material selection: Select a 4.5-6mm thick back panel of the same color and batch as the cabinet as the surface substrate, match the corresponding specifications of solid wood multilayer board and 5-12mm thick Keding board, remove dust and impurities from the substrate surface, and ensure that the surface is flat, without scratches or oil stains; (2) Applying adhesive: Apply environmentally friendly formaldehyde-free adhesive evenly to the bonding surfaces of the solid wood multilayer board and the Keding board, and the bonding surfaces of the back board and the solid wood multilayer board. The amount of adhesive applied should be controlled at 100-150g / ㎡ to ensure that the adhesive layer is uniform, without any missed areas or accumulation. (3) Cold pressing composite: The three-layer structure of “surface layer with the same color backing board + solid wood multilayer board + Keding board” is stacked in sequence and sent into the cold pressing equipment. The cold pressing pressure is 10-15MPa and the cold pressing time is 30-60min. It is cured and formed at room temperature. After cooling to room temperature, it forms an integrated composite substrate. The overall thickness of the substrate is controlled at 14.5-24mm according to the combination of the three-layer materials.

[0028] Step two: slitting and CNC engraving; (1) Slitting: According to the cabinet door design dimensions (width, height, frame width), the composite substrate is slitting into basic components such as frame strips, core boards, and shaped lines using a precision cutting machine. The slitting accuracy error is ≤0.05mm, and the cut surface is flat without chipped edges. (2) CNC engraving: The cut parts are fed into the CNC engraving machine. According to the preset solid wood frame, simple European style and other design drawings, the surface and side of the parts are engraved in three dimensions to process the shape groove, lines, tenon / slot structure, and reserve the glass inlay groove, rattan inlay position and other expansion structure. The engraving depth and curvature are precisely controllable, without burrs or defects.

[0029] Step 3: Edge sealing; All edges of the carved and cut components are sealed with PUR hot melt adhesive. The sealing strip is tightly attached to the edge of the substrate. The sealing pressure is controlled at 3-5MPa and the sealing temperature is 180-200℃. After sealing, the edges are cooled and shaped, and excess sealing material is removed to ensure smooth and flat edges, strong sealing performance, and improved moisture resistance and deformation resistance.

[0030] Step four: Precise assembly and cold pressing curing; (1) Assembly and splicing: According to the cabinet door structure design, the frame strip, core board and shaped lines are precisely aligned through the mortise and tenon / slot structure. Environmentally friendly formaldehyde-free adhesive is applied to the splicing point. Positioning clamps are used to fix the splicing during the splicing process to ensure that the splicing gap is uniform and without misalignment. If it is a glass door or rattan door, the glass inlay and rattan inlay process are completed simultaneously. (2) Cold pressing curing: The assembled cabinet door is sent into the cold pressing equipment. The cold pressing pressure is 8-12MPa and the cold pressing time is 40-70min. The adhesive is fully cured at room temperature, the structure is firmly bonded, and there is no delamination or deformation. (3) Trimming and finishing: Remove the positioning clamps, perform fine trimming on the edges and joints of the cabinet door, remove excess glue marks and edge burrs, polish smooth, and complete the preparation of the overall cabinet door.

[0031] The following is a method for preparing the product based on the above content; Example 1: Simple European Style Wardrobe Door Design 1. Substrate preparation: Select a 5mm thick back panel in the same color as the cabinet, and match it with a suitable solid wood multilayer board or an 8mm thick Keding board; 2. Composite cold pressing: The bonding surfaces of the three-layer substrate are evenly coated with 120g / ㎡ formaldehyde-free adhesive, and then stacked in the order of "back board + solid wood multilayer board + Keding board", and cold pressed at 12MPa for 40min to form an integrated composite substrate; 3. Processing and shaping: Cut into strips according to the dimensions of the wardrobe doors (600mm wide and 2400mm high), CNC engrave simple European-style curved lines and mortise and tenon structures, and seal all parts with PUR glue at 190°C and 4MPa. 4. Assembly and curing: Splice the frame and core board, cold press at 10MPa for 50 minutes to cure, and complete the cabinet door preparation after trimming. The finished cabinet door is the same color and seamless with the cabinet body, with smooth lines, tight edge sealing, and no deformation or cracking.

[0032] Example 2: Solid wood frame style cabinet with glass doors 1. Base material preparation: Select a 4.5mm thick back panel in the same color as the cabinet body, and match it with a suitable solid wood multilayer board or a 6mm thick Keding board; 2. Composite cold pressing: Coat with 110g / ㎡ formaldehyde-free adhesive, cold press at 11MPa for 35min to form a three-layer composite substrate; 3. Processing and shaping: Cut according to the cabinet door size (450mm wide, 700mm high), carve solid wood frame square lines and slot structure, and reserve glass mounting grooves. Seal the edges of the parts with PUR glue at 185°C and 3.5MPa. 4. Assembly and curing: Precisely splice each component and embed tempered glass, then cold press at 9MPa for 45 minutes to cure. After trimming, the finished cabinet door has the texture of a solid wood frame, the color scheme is completely consistent with the cabinet body, the glass is firmly embedded, and the edges are moisture-proof and sealed.

[0033] Example 3: Rattan-style entryway cabinet with rattan cabinet doors 1. Substrate preparation: Select a 6mm thick back panel in the same color as the entryway cabinet, and match it with a suitable solid wood multilayer board and a 10mm thick Keding board; 2. Composite cold pressing: Coat with 130g / ㎡ formaldehyde-free adhesive, cold press at 13MPa for 45min to form a three-layer composite substrate; 3. Processing and shaping: Cut according to the dimensions of the entryway cabinet door (500mm wide, 800mm high), carve simple design lines and reserve positions for rattan inlay, and seal the edges of the components with PUR glue at 195°C and 4.5MPa; Assembly and curing: The frame is spliced ​​and inlaid with natural rattan materials, then cold-pressed at 11MPa for 60 minutes to cure. After trimming, the finished cabinet doors have a uniform color scheme, the rattan inlay is flat, and the structure is stable and moisture-proof.

[0034] The following is a comparison table between the cabinet door of this patent and the prior art, as shown below.

[0035] (a) Zero color difference in color matching, extremely simple and efficient process. This invention directly uses a back panel of the same color and material as the cabinet body as the cabinet door surface, achieving complete uniformity in color and pattern between the cabinet door and the cabinet body from the source of the base material. It eliminates the need for cumbersome processes such as paint color matching, PVC wrapping color selection, and eco-board color matching, completely eliminating color difference problems and simplifying the color matching process by more than 90%, significantly reducing the color matching failure rate and rework costs.

[0036] (II) Cold pressing throughout the process + formaldehyde-free adhesive: a dual improvement in environmental protection and efficiency. 1. Upgraded environmental protection process: Abandoning traditional high-energy-consuming and high-polluting processes such as hot pressing, baking paint, and coating, the entire process adopts room temperature cold pressing process, without high-temperature heating links, and no large-scale emission of pollutants such as VOCs and formaldehyde, making the production process green and low-carbon. 2. Higher environmental standards: Formaldehyde-free adhesives are used throughout the process, combined with PUR adhesive for edge sealing, resulting in formaldehyde emissions of finished cabinet doors ≤0.02mg / m³. 3 It surpasses the highest national ENF environmental protection standard, meeting the core needs of modern consumers for green and healthy homes; 3. Improved production efficiency: The cold pressing process eliminates the need to wait for the hot pressing process to heat up and cool down, saving the preheating and energy costs of the hot pressing equipment. The total time for cold pressing composite and assembly curing of a single cabinet door can be controlled within 2 hours, which improves production efficiency by more than 30% compared to the hot pressing process.

[0037] (III) Three-layer composite structure with industry-leading resistance to deformation. It adopts a three-layer composite structure of "matching back panel + solid wood multilayer board + Keding board", with the 5-12mm thick Keding board in the middle serving as the core anti-deformation layer. This effectively offsets the internal stress of the solid wood multilayer board, solving the industry pain points of traditional cabinet doors being prone to warping, deformation, and cracking. It can maintain flatness under different temperature and humidity environments, extending the product's service life by 2-3 times. At the same time, the composite substrate structure has superior strength compared to pure solid wood and MDF, with stronger impact and wear resistance, and the design lines are less prone to damage.

[0038] (iv) PUR adhesive edge sealing core technology, comprehensively optimizing edge performance. All component edges are sealed with PUR adhesive, which increases bonding strength by more than 50% compared to traditional EVA adhesive. It also significantly enhances moisture resistance, temperature resistance, and anti-delamination ability, eliminating problems such as moisture swelling, edge curling, and chipping of cabinet door edges. It is especially suitable for use in humid environments, further improving the product's durability and aesthetics.

[0039] (v) Material reuse reduces costs, resulting in significant cost advantages. 1. Reuse of base materials: The cabinet back panel is used directly as the core decorative base material, eliminating the need to purchase special materials such as solid wood frame materials, painted boards, and PVC wrapping film, reducing the inventory of multiple types of base materials and lowering raw material procurement costs by 30%-50%; 2. Cost reduction in processes: High-cost processes such as hot pressing, baking paint, and coating are eliminated, reducing manual operation and investment in special equipment. The number of processing steps is reduced by more than 60%, and the labor and energy costs per unit product are reduced by more than 40%. 3. Reduced waste: The composite structure has high processing precision, with a carving and cutting waste rate of ≤3%, which is far lower than the 10%-15% waste rate of solid wood frames, greatly improving material utilization.

[0040] (vi) Standardized processes to adapt to large-scale production. 1. Simplified process: The core processes are cold pressing, strip cutting, engraving, PUR edge sealing, and assembly cold pressing, all of which are standardized mechanical processing procedures. They do not require highly skilled workers and the production operation is simple and easy to replicate. 2. Shorter cycle time: With no time-consuming steps such as hot pressing and paint drying, the production cycle of a single cabinet door is shortened from the traditional 3-7 days to 3-6 hours, and the order delivery efficiency is improved by more than 6 times; 3. Flexible adaptation: The carving program can be adjusted to quickly switch between various styles such as solid wood frame, simple European style, and modern minimalist style. At the same time, it can reserve glass and rattan inlay structure without changing the base material and equipment, perfectly adapting to the production needs of small batches and multiple styles of customized furniture.

[0041] (vii) Wide range of applications, compatible with multiple product categories. This technical solution is not only applicable to cabinet doors with solid wood frames and simple European style, but can also be directly expanded to glass-mounted cabinet doors and rattan-inlaid cabinet doors through structural reservations and process adjustments. It covers the cabinet door needs of various customized home cabinets such as wardrobes, kitchen cabinets, bookcases, wine cabinets, and entryway cabinets, greatly improving product versatility and market coverage, and meeting the diversified customization needs of different customers.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite structure cabinet door based on a matching back panel substrate, characterized in that, It includes an intermediate stabilizing layer, a back panel layer of the same color on the outer side of the intermediate stabilizing layer, and an inner layer on the inner side of the intermediate stabilizing layer. The back panel layer, the intermediate stabilizing layer and the inner layer are cold-pressed together with formaldehyde-free adhesive to form an integral substrate. The edges of the integral substrate are sealed with PUR adhesive.

2. The composite structure cabinet door according to claim 1, characterized in that: The matching back panel layer uses a custom-made home back panel that is completely the same color and material as the cabinet, with a thickness of 4.5-6mm.

3. The composite structure cabinet door according to claim 1, characterized in that: The intermediate stabilizing layer is made of Keding board with a thickness of 5-12mm.

4. The composite structure cabinet door according to claim 1, characterized in that: The inner layer is made of solid wood multilayer board.

5. The composite structure cabinet door according to claim 1, characterized in that: The integral substrate can be CNC engraved and slit to form the structural components of the cabinet door.

6. A method for preparing the composite structure cabinet door according to any one of claims 1-5, characterized in that, Includes the following steps, Step 1: Pre-treatment and cold pressing of the overall substrate; Select the intermediate stabilizing layer, the same color backing layer and the inner layer of the assembled substrate, apply adhesive to the bonding surfaces of the intermediate stabilizing layer, the same color backing layer and the inner layer, and then cold press the same color backing layer, the intermediate stabilizing layer and the inner layer together. Step 2, Slitting and CNC Engraving: According to the cabinet door design dimensions, the composite substrate is slitting into basic components such as frame strips, core boards, and shaped lines using a precision cutting machine. The slitting components are then fed into a CNC engraving machine to process shaped grooves, lines, and tenon / slot structures according to the preset drawings. At the same time, expansion structures such as glass inlay grooves and rattan inlay positions are reserved. Step 3, edge sealing treatment; all edges of the carved and cut parts are sealed with PUR hot melt adhesive; Step 4, Precise assembly and cold pressing curing: Assemble and splice the cabinet door according to the cabinet door structure design, send the assembled cabinet door into the cold pressing equipment for cold pressing curing, and trim and finish the cabinet door.

7. The method for preparing a composite structure cabinet door according to claim 6, characterized in that, In step one, select a 4.5-6mm thick back panel of the same color and batch as the cabinet as the surface substrate, and match it with solid wood multilayer board and 5-12mm thick Keding board of the corresponding specifications. In step one, the bonding surfaces of the same-color backing layer, the intermediate stabilizing layer and the inner layer are uniformly coated with environmentally friendly formaldehyde-free adhesive, and the coating amount is controlled at 100-150g / ㎡. In step one, the three-layer structure of the same color backing layer + the intermediate stabilizing layer + the inner layer is stacked in sequence and fed into a cold pressing equipment. The cold pressing pressure is 10-15MPa and the cold pressing time is 30-60min. It is cured and formed at room temperature. After cooling to room temperature, an integrated composite substrate is formed. The overall thickness of the substrate is controlled at 14.5-24mm according to the combination of the three materials.

8. In the method for preparing a composite structure cabinet door according to claim 6, in step two, the cutting accuracy error of the precision cutting machine is ≤0.05mm, and the cut surface is flat and without chipped edges.

9. In the method for preparing a composite structure cabinet door according to claim 6, in step three, the edge sealing pressure is controlled at 3-5 MPa, the edge sealing temperature is 180-200℃, and the edge sealing is cooled and shaped after cooling, and excess edge sealing material is removed.

10. The method for preparing a composite structure cabinet door according to claim 6, in step four, an environmentally friendly formaldehyde-free adhesive is applied to the splicing area, and a positioning clamp is used for fixing during the splicing process. If it is a glass door or a rattan door, the glass inlay and rattan inlay processes are completed simultaneously. In step four, the cold pressing pressure is 8-12 MPa, and the cold pressing time is 40-70 min; In step four, the positioning fixture is removed, and the edges and joints of the cabinet door are finely trimmed to remove excess glue residue and edge burrs. The surface is then sanded smooth to complete the preparation of the overall cabinet door.

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