Multi-composite-layer high-temperature-resistant wooden door and manufacturing method thereof

Abstract

The invention discloses a multi-composite-layer high-temperature-resistant wooden door and a manufacturing method thereof. The multi-composite-layer high-temperature-resistant wooden door comprises a door core plate and a protection frame arranged on the peripheral edge of the door core plate. The door core plate is composed of a base balance layer, a damp-proof sealing layer, a structure strengthening layer, a high-temperature-resistant heat insulation layer and a fireproof decoration layer which are sequentially arranged. The protection frame is composed of a protection layer. According to the invention, multiple protections of high temperature resistance, fire prevention, heat insulation, moisture prevention and deformation prevention can be realized through a composite structure with different materials and functions; high-performance materials such as stainless steel, flame-retardant PVC (polyvinyl chloride) and ceramic fibers are selected, so that the product has excellent high-temperature resistance and fireproof performance; abundant decorative effects are provided through the flame-retardant PVC film, the stainless steel plate endows the product with modern feeling and advanced feeling, and meanwhile, the long-term durability of the product is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of high temperature resistant wooden doors, and in particular to a multi-composite layer high temperature resistant wooden door and a manufacturing method thereof. Background Art

[0002] As an important part of building interior decoration, wooden doors not only serve to separate spaces and protect privacy, but also beautify the environment and improve living quality.

[0003] However, with the diversification of modern lifestyles and the complexity of living environments, traditional wooden doors often show defects such as easy deformation and high temperature resistance when faced with high temperature environments and humidity changes, which seriously affects their service life and safety.

[0004] Specifically, regarding easy deformation: traditional wooden doors mostly use solid wood or solid wood composite panels as the main materials. Although the texture is natural and beautiful, the solid wood material has a high moisture content and the wood fiber is easy to absorb moisture and expand, which makes it easy to deform under long-term humidity changes, especially at the connection between the door frame and the door leaf, where gaps often appear due to different expansion coefficients, affecting the sealing and aesthetics; furthermore, the design of some wooden doors does not fully consider the material properties and force balance. For example, there is a lack of sufficient supporting structure inside the door leaf, or the connection between the door frame and the door leaf is not strong enough, which makes it easy to be affected by external forces and deform during use; in addition, if the wood is not fully dried before processing, or the drying process is improper, too much moisture will remain in the wood, which will easily cause deformation in the future; if the solid wood composite panels are spliced ​​by simple gluing instead of more stable finger-joining, plug-in and other technologies, the risk of deformation will also increase.

[0005] Specifically, with regard to high temperature intolerance: the surface of existing wooden doors undergoes fireproofing treatment, such as spraying fire-retardant paint, but this treatment method can often only provide limited fire protection and cannot fundamentally solve the deformation and safety problems under high temperatures; moreover, the internal fillings of some wooden doors are honeycomb paper, foam plastics, etc., and these materials have limited thermal insulation properties and cannot effectively block the impact of external high temperatures on the door body, causing the internal temperature of the door body to rise, accelerating the thermal decomposition and deformation of the wood; furthermore, the existing wooden doors lack a reasonable insulation layer design, which makes it easy for heat to be conducted through the gaps between the door seam and the door frame and the wall, reducing the overall thermal insulation effect.

[0006] In summary, existing wooden door solutions have problems with easy deformation and high temperature resistance, which are specifically reflected in many aspects such as material selection, structural design, processing technology and thermal insulation performance. Summary of the invention

[0007] The object of the present invention is to provide a multi-composite layer high temperature resistant wooden door and a manufacturing method thereof, thereby solving all or one of the above-mentioned problems existing in the prior art.

[0008] In order to solve the above technical problems, the specific technical solutions of the present invention are as follows: In one aspect, the present invention provides a multi-composite layer high temperature resistant wooden door, comprising: A door core board and a protective frame arranged at the edges around the door core board; The door core board is composed of a base balancing layer, a moisture-proof sealing layer, a structural reinforcement layer, a high-temperature resistant insulation layer and a fireproof decorative layer which are arranged in sequence; and the protection frame is composed of a protective layer.

[0009] As an improved solution, the protective layer includes: a 304 stainless steel plate; the 304 stainless steel plate is made of a composite material mixed with chromium, nickel and iron; The mass proportion of chromium in the composite material is: 18%-20%: The mass proportion of nickel in the composite material is: 8%-12%: The mass proportion of the iron in the composite material is 68%-74%.

[0010] As an improved solution, the fireproof decorative layer includes: a flame-retardant PVC coating; the flame-retardant PVC coating is made of aluminum oxide nanoparticles, antimony trioxide and polyvinyl chloride; The mass proportion of the aluminum oxide nanoparticles is: 5%-10%; The mass proportion of antimony trioxide is: 10%-8%; The mass proportion of the polyvinyl chloride is: 80%-87%.

[0011] As an improved solution, the high temperature resistant heat insulation layer includes: a rock wool board, a second high temperature resistant heat insulation layer, a first high temperature resistant heat insulation layer, a second high temperature resistant heat insulation layer and a third high temperature resistant heat insulation layer arranged in sequence.

[0012] As an improved solution, the first high temperature resistant heat insulation layer is composed of ceramic fiber felt and aluminum silicate fiber blanket; The ceramic fiber felt is made of alumina and silicon dioxide; The aluminum silicate fiber is made of aluminum silicate.

[0013] As an improved solution, the third high temperature resistant heat insulation layer is made of carbon fiber cloth; The second high temperature resistant heat insulation layer is made of zirconium oxide refractory fiber.

[0014] As an improved solution, the structural reinforcement layer includes: a plurality of layers of solid wood composite boards; The several layers of solid wood composite boards are respectively composed of several layers of log chips, and phenolic resin is bonded between the several layers of log chips; the mass ratio of the log chips to the phenolic resin is 9:1.

[0015] As an improved solution, the moisture-proof sealing layer comprises: a composite polyethylene waterproof membrane layer and an aluminum foil composite layer; The thickness ratio of the polyethylene waterproof membrane layer to the aluminum foil composite layer is 8:2.

[0016] As an improved solution, the base balancing layer comprises: a high-density fiberboard; the high-density fiberboard is made of wood fiber, urea-formaldehyde resin and moisture-proof agent; The mass proportion of the wood fiber is 85%-90%; The mass proportion of the urea-formaldehyde resin is 5%-8%; The mass proportion of the moisture-proofing agent is 5%-7%.

[0017] On the other hand, the present invention also provides a method for manufacturing a multi-composite layer high temperature resistant wooden door, comprising the following steps: Pre-processing steps: Preparation of protective layer: pickling the 304 stainless steel plate to remove the oxide scale, then electrolytic polishing, and then passivation treatment to obtain the protective layer; Preparation of fireproof decorative layer: PVC film is melted and extruded at high temperature, then aluminum oxide nanoparticles and antimony trioxide flame retardant are added, and then calendared and cooled to set the shape, and then decorative patterns are printed on the surface to obtain the fireproof decorative layer; Preparation of high temperature resistant thermal insulation layer: pre-treat ceramic fiber and aluminum silicate fiber at high temperature respectively, then mix them in proportion, and form a felt or blanket structure through needle punching or lamination process to obtain a first high temperature resistant thermal insulation layer; use zirconium oxide refractory fiber to make a second high temperature resistant thermal insulation layer; use carbon fiber cloth to make a third high temperature resistant thermal insulation layer; place the first high temperature resistant thermal insulation layer as the middle layer, and symmetrically attach the two second high temperature resistant thermal insulation layers to both sides of the second high temperature resistant thermal insulation layer, and then attach the third high temperature resistant thermal insulation layer to the second high temperature resistant thermal insulation layer on one side, and attach a rock wool board to the second high temperature resistant thermal insulation layer on the other side; align and attach the rock wool board, the second high temperature resistant thermal insulation layer, the first high temperature resistant thermal insulation layer, the second high temperature resistant thermal insulation layer and the third high temperature resistant thermal insulation layer to obtain a final high temperature resistant thermal insulation layer; Preparation of the structural strengthening layer: drying, degreasing and screening a number of logs, and then laminating and bonding them in sequence using phenolic resin glue to obtain the structural strengthening layer; Preparation of moisture-proof sealing layer: biaxially stretching the PE film, and compounding the stretched PE film with the aluminum foil by hot pressing to obtain a waterproof and moisture-proof composite layer as the moisture-proof sealing layer; Preparation of the base balancing layer: After the wood fibers are crushed, screened and dried in sequence, urea-formaldehyde resin and moisture-proof agent are added, and a HDF board is made by high-pressure molding, and the HDF board is sanded to obtain the base balancing layer; Door core lamination steps: The moisture-proof sealing layer is pasted on one side of the structural strengthening layer, and then the high-temperature resistant heat-insulating layer is evenly laid on the structural strengthening layer; thereafter, the fireproof decorative layer is pasted on the high-temperature resistant heat-insulating layer with the front side of the decorative pattern facing outward; finally, the base balancing layer is pasted on the other side of the structural strengthening layer to obtain a door core board; Steps for installing the protective layer: Cut the protective layer according to the size of the door core board; perform edge bending processing on the cut protective layer according to the size of the door core board to obtain a protective frame; fix the protective frame around the door core board to obtain a multi-composite layer high temperature resistant wooden door finished product; Post-processing steps: The finished multi-composite layer high temperature resistant wooden door is ground and polished.

[0018] The beneficial effects of the technical solution of the present invention are: The present invention achieves multiple protections of high temperature resistance, fire prevention, heat insulation, moisture resistance and deformation resistance through a composite structure of different materials and functions; high-performance materials such as stainless steel, flame-retardant PVC, and ceramic fiber are selected to ensure that the product has excellent high temperature resistance and fire resistance; environmentally friendly resins, moisture-proof agents and other materials are used to reduce the impact on the environment; at the same time, good thermal insulation performance is conducive to energy conservation and emission reduction; furthermore, the flame-retardant PVC coating provides rich decorative effects, and the stainless steel plate gives the product a modern and high-end feel, while ensuring the long-term durability of the product, which is suitable for door control needs in various high-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of the cross-sectional structure of the multi-composite layer high temperature resistant wooden door described in Example 1 of the present invention when viewed from a side perspective; Figure 2 1 is a schematic diagram of the top view of the structure of the multi-composite layer high temperature resistant wooden door according to Example 1 of the present invention; Figure 3 It is a schematic diagram of the combined structure of the high temperature resistant heat insulation layer of the multi-composite layer high temperature resistant wooden door described in Example 1 of the present invention; Figure 4 It is a schematic flow chart of the method for manufacturing a multi-composite layer high temperature resistant wooden door according to Embodiment 1 of the present invention; The symbols in the accompanying drawings are explained as follows: 1. Base balancing layer; 2. Moisture-proof sealing layer; 3. Structural strengthening layer; 4. High-temperature resistant insulation layer; 5. Fireproof decorative layer; 6. Protective layer; 7. Rock wool board; 8. Second high-temperature resistant insulation layer; 9. First high-temperature resistant insulation layer; 10. Third high-temperature resistant insulation layer; 11. Door core board. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0023] The terms "first", "second", etc. in the specification and claims of this article and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of this article described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0024] Embodiment 1, this embodiment provides a multi-composite layer high temperature resistant wooden door, such as Figure 1~Figure 3 As shown, it comprises: a door core board and a protection frame arranged at the edges of the door core board; wherein the door core board comprises a base balancing layer, a moisture-proof sealing layer, a structural strengthening layer, a high-temperature resistant heat-insulating layer and a fireproof decorative layer arranged in sequence; the protection frame is composed of a protective layer; Specifically, the protective layer includes: 304 stainless steel plate; Among them, the 304 stainless steel plate is composed of a composite material that meets the ASTM A240 standard, and the composite material includes: 18%-20% chromium (Cr), 8%-12% nickel (Ni) and 68%-74% iron (Fe); Specifically, the fireproof decorative layer includes: a flame retardant PVC coating; Among them, the flame retardant PVC film is composed of 5%-10% aluminum oxide (Al 2 O 3) nanoparticles, 10%-8% flame retardant (such as antimony trioxide Sb 2 O 3 ) and 80%-87% polyvinyl chloride (PVC); Specifically, the high temperature resistant heat insulation layer comprises: a rock wool board, a second high temperature resistant heat insulation layer, a first high temperature resistant heat insulation layer, a second high temperature resistant heat insulation layer and a third high temperature resistant heat insulation layer arranged in sequence; The first high temperature resistant insulation layer is composed of two ceramic fiber felts and aluminum silicate fiber blankets with a volume ratio of 1:1; the main component of the ceramic fiber felt is aluminum oxide Al 2 O 3 and silicon dioxide SiO 2 ; The main component of aluminum silicate fiber blanket is Al 2 SiO 5 ; Among them, the third high temperature resistant insulation layer is made of carbon fiber cloth; Among them, the second high temperature resistant heat insulation layer is made of zirconia refractory fiber; Specifically, the structural reinforcement layer includes: a multi-layer solid wood composite board; The multi-layer solid wood composite board is composed of several layers of high-quality log chips, and phenolic resin is bonded between the layers of high-quality log chips; wherein the weight ratio of the high-quality log chips to the phenolic resin is 9:1; Specifically, the moisture-proof sealing layer includes: a polyethylene (PE) waterproof membrane layer and an aluminum foil (Al) composite layer; Among them, the thickness ratio of the polyethylene waterproof membrane layer and the aluminum foil composite layer is 8:2; Specifically, the base balancing layer includes: high-density fiberboard (HDF); Among them, high-density fiberboard is made of wood fiber, urea-formaldehyde resin (or other environmentally friendly resin) and moisture-proof agent, wherein the moisture-proof agent can be calcium chloride CaCl 2 ; The weight ratio of wood fiber, urea-formaldehyde resin and moisture-proof agent is: wood fiber 85%-90%, urea-formaldehyde resin 5%-8%, moisture-proof agent 5%-7%; In addition, in order to verify the high temperature resistance and anti-deformation performance of the wooden door of the present application, various index comparison experiments were conducted between the wooden door of the present application and the traditional wooden door. The test followed the relevant industry standards, using professional testing equipment and scientific methods. The specific test results are as follows: It should be noted that the above examples are only for explaining the present invention and cannot limit the protection scope of the present invention.

[0025] Embodiment 2, this embodiment is based on the same inventive concept as the multi-composite layer high temperature resistant wooden door described in embodiment 1, and provides a method for manufacturing a multi-composite layer high temperature resistant wooden door, such as Figure 4 As shown, the following steps are included: S100, pre-processing steps, including: S101, preparing a protective layer: pickling the 304 stainless steel plate to remove the oxide scale, then electrolytic polishing to improve the surface finish, and finally passivation treatment to enhance the corrosion resistance to obtain a protective layer; S102, preparing a fireproof decorative layer: extruding a PVC film through high-temperature melt melting, adding aluminum oxide nanoparticles and a flame retardant, calendering and cooling to set the film, and finally printing a decorative pattern on the surface to obtain a fireproof decorative layer; S103, preparing a high temperature resistant thermal insulation layer: pre-treating the ceramic fiber and the aluminum silicate fiber at high temperature to remove impurities respectively, then mixing them in proportion, and forming a felt or blanket structure through a needle punching or lamination process to obtain a first high temperature resistant thermal insulation layer; using zirconium oxide refractory fiber to make a second high temperature resistant thermal insulation layer; using carbon fiber cloth to make a third high temperature resistant thermal insulation layer; placing the first high temperature resistant thermal insulation layer as an intermediate layer, and symmetrically attaching the two second high temperature resistant thermal insulation layers to both sides of the second high temperature resistant thermal insulation layer, and then attaching the third high temperature resistant thermal insulation layer to the second high temperature resistant thermal insulation layer on one side, and attaching a rock wool board to the second high temperature resistant thermal insulation layer on the other side; aligning and attaching the above multi-layer structure to obtain a final high temperature resistant thermal insulation layer; S104, preparing a structural strengthening layer: drying, degreasing and selecting a plurality of logs, and then laminating and bonding them in sequence using phenolic resin glue to form a high-strength, water-resistant and moisture-proof composite board as a structural strengthening layer; S105, preparing a moisture-proof sealing layer: biaxially stretching the PE film to increase its strength, and then laminating the stretched PE film with an aluminum foil by hot pressing to form a waterproof and moisture-proof composite layer as a moisture-proof sealing layer; S106, preparing a base balancing layer: after crushing, screening and drying the wood fibers in sequence, adding urea-formaldehyde resin and moisture-proof agent, forming a HDF board through high-pressure molding, and sanding the HDF board to improve the surface flatness to obtain a base balancing layer.

[0026] S200, door core board lamination step, including: S201, first, affix a moisture-proof sealing layer to one side of the structural strengthening layer, and then evenly lay a high-temperature resistant heat-insulating layer on the structural strengthening layer; S202, then, attach the fireproof decorative layer to the thermal insulation layer, ensuring that the front of the decorative pattern faces outward; finally, attach the base balancing layer to the other side of the structural reinforcement layer to obtain a complete door core board.

[0027] S300, protective layer installation steps, including: S301. According to the size of the door core board, the protective layer is cut into a suitable size, and the edges are bent to increase the strength to obtain a protective frame; the protective frame is fixed to the door core board by screws or nails to obtain a multi-composite layer high temperature resistant wooden door product.

[0028] S400, post-processing step, including: S401. First, finely grind and polish the entire multi-layer high-temperature resistant wooden door to ensure that each layer is tightly bonded and the surface is smooth and flawless; S402. After the above treatment, the multi-composite layer high temperature resistant wooden door is subjected to performance tests such as high temperature resistance, fire resistance, and moisture resistance to ensure that the product meets relevant standards.

[0029] Different from the prior art, the multi-composite layer high-temperature resistant wooden door and its manufacturing method of the present application can make the manufactured wooden door have better high-temperature resistance, fire prevention, heat insulation, moisture resistance and anti-deformation performance, while maintaining excellent aesthetics and durability, and is suitable for kitchens, boiler rooms, industrial workshops and other places with high temperature or potential fire risks.

[0030] It should be understood that in the various embodiments of this document, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this document.

[0031] It should also be understood that in the embodiments of this article, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this article.

[0033] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0034] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this article.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-composite layer high temperature resistant wooden door, characterized in that: include: A door core board and a protective frame arranged at the edges around the door core board; The door core board is composed of a base balancing layer, a moisture-proof sealing layer, a structural reinforcement layer, a high-temperature resistant insulation layer and a fireproof decorative layer which are arranged in sequence; and the protection frame is composed of a protective layer.

2. The multi-composite layer high temperature resistant wooden door according to claim 1, characterized in that: The protective layer comprises: a 304 stainless steel plate; the 304 stainless steel plate is made of a composite material mixed with chromium, nickel and iron; The mass proportion of chromium in the composite material is: 18%-20%: The mass proportion of nickel in the composite material is: 8%-12%: The mass proportion of the iron in the composite material is 68%-74%.

3. The multi-composite layer high temperature resistant wooden door according to claim 1, characterized in that: The fireproof decorative layer comprises: a flame-retardant PVC coating; the flame-retardant PVC coating is made of aluminum oxide nanoparticles, antimony trioxide and polyvinyl chloride; The mass proportion of the aluminum oxide nanoparticles is: 5%-10%; The mass proportion of antimony trioxide is: 10%-8%; The mass proportion of the polyvinyl chloride is: 80%-87%.

4. The multi-composite layer high temperature resistant wooden door according to claim 1, characterized in that: The high temperature resistant heat insulation layer comprises: a rock wool board, a second high temperature resistant heat insulation layer, a first high temperature resistant heat insulation layer, a second high temperature resistant heat insulation layer and a third high temperature resistant heat insulation layer which are arranged in sequence.

5. The multi-composite layer high temperature resistant wooden door according to claim 4, characterized in that: The first high temperature resistant heat insulation layer is composed of ceramic fiber felt and aluminum silicate fiber blanket; The ceramic fiber felt is made of alumina and silicon dioxide; The aluminum silicate fiber is made of aluminum silicate.

6. The multi-composite layer high temperature resistant wooden door according to claim 5, characterized in that: The third high temperature resistant heat insulation layer is made of carbon fiber cloth; The second high temperature resistant heat insulation layer is made of zirconium oxide refractory fiber.

7. The multi-composite layer high temperature resistant wooden door according to claim 5, characterized in that: The structural reinforcement layer includes: a plurality of layers of solid wood composite panels; The several layers of solid wood composite boards are respectively composed of several layers of log chips, and phenolic resin is bonded between the several layers of log chips; the mass ratio of the log chips to the phenolic resin is 9:

1.

8. The multi-composite layer high temperature resistant wooden door according to claim 1, characterized in that: The moisture-proof sealing layer comprises: a composite polyethylene waterproof film layer and an aluminum foil composite layer; The thickness ratio of the polyethylene waterproof membrane layer to the aluminum foil composite layer is 8:

2.

9. The multi-composite layer high temperature resistant wooden door according to claim 1, characterized in that: The base balancing layer comprises: a high-density fiberboard; the high-density fiberboard is made of wood fiber, urea-formaldehyde resin and moisture-proof agent; The mass proportion of the wood fiber is 85%-90%; The mass proportion of the urea-formaldehyde resin is 5%-8%; The mass proportion of the moisture-proofing agent is 5%-7%.

10. The method for manufacturing the multi-composite layer high temperature resistant wooden door as claimed in claim 1, characterized in that: The method comprises the following steps: Pre-processing steps: Preparation of protective layer: pickling the 304 stainless steel plate to remove the oxide scale, then electrolytic polishing, and then passivation treatment to obtain the protective layer; Preparation of fireproof decorative layer: PVC film is melted and extruded at high temperature, then aluminum oxide nanoparticles and antimony trioxide flame retardant are added, and then calendared and cooled to set the shape, and then decorative patterns are printed on the surface to obtain the fireproof decorative layer; Preparation of high temperature resistant thermal insulation layer: pre-treat ceramic fiber and aluminum silicate fiber at high temperature respectively, then mix them in proportion, and form a felt or blanket structure through needle punching or lamination process to obtain a first high temperature resistant thermal insulation layer; use zirconium oxide refractory fiber to make a second high temperature resistant thermal insulation layer; use carbon fiber cloth to make a third high temperature resistant thermal insulation layer; place the first high temperature resistant thermal insulation layer as the middle layer, and symmetrically attach the two second high temperature resistant thermal insulation layers to both sides of the second high temperature resistant thermal insulation layer, and then attach the third high temperature resistant thermal insulation layer to the second high temperature resistant thermal insulation layer on one side, and attach a rock wool board to the second high temperature resistant thermal insulation layer on the other side; align and attach the rock wool board, the second high temperature resistant thermal insulation layer, the first high temperature resistant thermal insulation layer, the second high temperature resistant thermal insulation layer and the third high temperature resistant thermal insulation layer to obtain a final high temperature resistant thermal insulation layer; Preparation of the structural strengthening layer: drying, degreasing and screening a number of logs, and then laminating and bonding them in sequence using phenolic resin glue to obtain the structural strengthening layer; Preparation of moisture-proof sealing layer: biaxially stretching the PE film, and compounding the stretched PE film with the aluminum foil by hot pressing to obtain a waterproof and moisture-proof composite layer as the moisture-proof sealing layer; Preparation of the base balancing layer: After the wood fibers are crushed, screened and dried in sequence, urea-formaldehyde resin and moisture-proof agent are added, and a HDF board is made by high-pressure molding, and the HDF board is sanded to obtain the base balancing layer; Door core lamination steps: The moisture-proof sealing layer is pasted on one side of the structural strengthening layer, and then the high-temperature resistant heat-insulating layer is evenly laid on the structural strengthening layer; thereafter, the fireproof decorative layer is pasted on the high-temperature resistant heat-insulating layer with the front side of the decorative pattern facing outward; finally, the base balancing layer is pasted on the other side of the structural strengthening layer to obtain a door core board; Steps for installing the protective layer: Cut the protective layer according to the size of the door core board; perform edge bending processing on the cut protective layer according to the size of the door core board to obtain a protective frame; fix the protective frame around the door core board to obtain a multi-composite layer high temperature resistant wooden door finished product; Post-processing steps: The finished multi-composite layer high temperature resistant wooden door is ground and polished.

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