Large-scale production method for SPC cellular board based on longitudinal structure

Abstract

The invention relates to a method for large-scale production of SPC cellular boards based on a longitudinal structure, and belongs to the technical field of composite material processing, and the method comprises the following steps: step 1, preparing raw materials; step 2, manufacturing a skin and a honeycomb core layer: melting and extruding the prepared raw materials through a double-screw extruder, obtaining the honeycomb core layer and the skin through a skin and honeycomb integrated mold, covering the upper surface and the lower surface of the honeycomb core layer with the skin, and axially parallel to the honeycomb core layer; and step 3, cooling and vacuum shaping: putting the skin and the honeycomb core layer into a vacuum cavity for extrusion shaping and cooling. The honeycomb core layer and the skin are integrally produced through the skin and honeycomb integrated mold and directly enter the vacuum cavity to be extruded, shaped and cooled, and synchronous matching of production lines of the honeycomb core layer and the skin is achieved; the double-screw extruder used for honeycomb structure forming and skin manufacturing is the same double-screw extruder, and the whole process is simple and suitable for large-scale continuous production.

Description

Technical Field

[0001] This invention belongs to the field of composite material processing technology, and specifically relates to a method for large-scale production of longitudinally structured SPC honeycomb panels. Background Technology

[0002] With the rapid development of prefabricated buildings and green building materials industries, and the increasing demand for environmentally friendly, lightweight, and multifunctional panels in interior decoration, traditional decorative panels can no longer meet the market's comprehensive requirements for product performance, cost, and large-scale production. Existing longitudinally structured SPC (stone-plastic composite) honeycomb panels have comprehensive advantages such as environmental friendliness, waterproofing, fire resistance, lightweight, and high strength. However, the composite of SPC panels and honeycomb cores often involves manual or semi-automatic glue application, combined with cold-press curing processes. This results in defects such as low precision in glue quantity control (deviation ≥0.3g / ㎡), high bubble rate at the bonding interface (≥5%), and a high risk of delamination (peel strength ≤0.5MPa). Furthermore, the preparation method lacks the capability for large-scale, continuous production.

[0003] Therefore, to address the issue that existing technologies for fabricating longitudinally structured SPC honeycomb panels lack the capacity for large-scale, continuous production, a method for large-scale production of longitudinally structured SPC honeycomb panels is needed. Summary of the Invention

[0004] This invention provides a method for large-scale production of longitudinal structure SPC honeycomb panels, which solves the problem that the existing longitudinal structure SPC honeycomb panel manufacturing process does not have the capability to form large-scale, continuous production.

[0005] This invention is achieved through the following technical solution: a method for large-scale production of longitudinally structured SPC honeycomb panels, comprising at least the following steps:

[0006] Step 1: Prepare the raw materials; Step 2, Fabrication of the outer skin and honeycomb core layer: The prepared raw materials are melt-extruded through a twin-screw extruder and then passed through an integrated mold for the outer skin and honeycomb to obtain the honeycomb core layer and the outer skin. The outer skin covers the upper and lower surfaces of the honeycomb core layer, and the axial directions of the outer skin and the honeycomb core layer are parallel to each other. Step 3, Cooling and Vacuum Shaping: The skin and honeycomb core layer are placed in a vacuum chamber for compression shaping and cooling.

[0007] To better realize the present invention, further optimizations are made to the above structure. In step one, the raw materials for preparation include: Mix and heat the raw materials; The heated raw materials are then cooled and mixed.

[0008] To better realize the present invention, further optimization is made to the above structure. In step one, the raw materials include PVC powder and calcium carbonate, and the weight ratio of PVC powder and calcium carbonate is 1:2-1:3.

[0009] To better realize the present invention, the above structure is further optimized by heating the raw material to 110℃-125℃, then adding stabilizer, lubricant, toughening agent and colorant to the raw material, and then stirring at a speed of 900-1450 r / min until uniformly dried.

[0010] To better realize the present invention, further optimizations are made to the above structure. In step one, the cooling and mixing of the heated raw materials includes: The heated raw materials are then discharged into a cold mixer. The raw material temperature is reduced to below 45°C by air cooling or liquid cooling.

[0011] To better realize the present invention, further optimization is made to the above structure. In step two, the melting temperature of the prepared raw material in the twin-screw extruder is 150℃-185℃.

[0012] To better realize the present invention, further optimizations are made to the above structure. The integrated skin and honeycomb mold includes a honeycomb mold and a skin mold. The honeycomb mold is a multi-layered continuous honeycomb structure, and the honeycomb structure is pentagonal or hexagonal. The skin mold is a flat gap, and two skin molds are arranged on both sides of the honeycomb mold.

[0013] To better realize the present invention, further optimizations are made to the above structure. In step five, the step of placing the skin and the honeycomb core layer into a vacuum chamber for extrusion, shaping, and cooling includes: The outer skin and the honeycomb core layer are placed in a vacuum chamber for vacuum adsorption and shaping to obtain a shaped honeycomb panel. The molded honeycomb panel is cooled by liquid cooling.

[0014] To better realize the present invention, further optimization is made to the above structure, including step four, coating: coating the cooled formed honeycomb panel.

[0015] Compared with the prior art, the present invention has the following advantages: The above method integrates the honeycomb core layer and the outer skin into a single mold, directly extruding and cooling them in a vacuum chamber, achieving synchronous matching of the production lines for the honeycomb core layer and the outer skin. The longitudinally structured SPC honeycomb panel is formed through vacuum extrusion, eliminating the need for adhesives and other materials, resulting in excellent adhesion between the honeycomb core layer and the outer skin. The twin-screw extruder used for both honeycomb structure forming and outer skin fabrication is the same, simplifying the overall process and making it suitable for large-scale continuous production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the method for large-scale production of SPC honeycomb panels based on longitudinal structure in this invention; Figure 2 This is a front view of the longitudinally structured SPC honeycomb panel in this invention; Figure 3 This is a front view of the integrated mold for the skin and honeycomb structure in this invention.

[0018] In the picture: 1-Honeycomb core layer; 2-Outer skin; 3-Honeycomb mold; 4-Outer skin mold. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Example 1: This application provides a method for the large-scale production of longitudinally structured SPC honeycomb panels, the specific implementation of which is as follows: like Figure 1 As shown, the first step is to prepare the raw materials. This step aims to prepare the composite material for subsequent extrusion molding. Various polymer powders, fillers, and necessary additives are mixed to form a homogeneous mixture. This mixing process can be performed manually or using mechanical stirring equipment to ensure uniform distribution of the components.

[0023] Next, the honeycomb core layer is prepared. The prepared raw materials are fed into a twin-screw extruder and heated to a molten state inside the extruder. The molten raw materials are then extruded through an integrated skin and honeycomb die to form a structure with continuous strip-shaped honeycomb cells. After extrusion, these strip-shaped honeycomb cells can be cut along their cross-section by a cutting device to obtain a honeycomb core layer of a specific thickness.

[0024] The skin is then prepared. Similar to the preparation of the honeycomb core, the prepared raw materials are fed into a twin-screw extruder and heated to a molten state inside the extruder. The molten raw materials are then extruded through an integrated skin and honeycomb die to form a continuous sheet material, which is the skin.

[0025] After the honeycomb core layer and the outer skin are prepared simultaneously, the outer skin covers the upper and lower surfaces of the honeycomb core layer. During this forming process, the laying direction of the outer skin is set to be parallel to the axis of the honeycomb core layer. This parallel laying method helps to form a longitudinal structure and enhances the overall performance of the board.

[0026] Finally, cooling and vacuum shaping are performed. The composite of the skin and honeycomb core layer, with its longitudinal structure formed, is placed into a vacuum chamber. Inside the vacuum chamber, the composite is compressed and shaped using negative vacuum pressure, ensuring a tight bond between the layers and eliminating any internal voids. Simultaneously, the composite is cooled during the shaping process to solidify it and maintain geometric stability, ultimately forming a longitudinally structured SPC honeycomb panel. Cooling methods can include water cooling and air cooling.

[0027] This application employs a production method combining extrusion molding and vacuum shaping, achieving simultaneous matching of the production lines for the honeycomb core layer and the outer skin. This eliminates the need for traditional adhesive application processes, effectively avoiding problems such as inaccurate adhesive control, air bubbles at the bonding interface, and the risk of delamination. This method simplifies the production process, improves production efficiency and product quality, thereby meeting the large-scale, continuous production needs of the prefabricated building and green building materials industries for environmentally friendly, lightweight, and high-strength panels.

[0028] This application further proposes a process for preparing raw materials, including: mixing and heating the raw materials; and cooling and mixing the heated raw materials. Heating can reduce the viscosity of the materials, improve mixing efficiency, and help remove moisture from the raw materials, preventing the formation of bubbles during subsequent extrusion. This process can be carried out using a high-speed mixer, where a heat source raises the material temperature to a preset mixing and heating temperature, ensuring that the various components reach a relatively uniform state before entering the twin-screw extruder. Subsequently, the heated raw materials are cooled and mixed to lower the material temperature to a suitable range for feeding into the twin-screw extruder. Mixing continues during the cooling process to further improve the uniformity of the materials, prevent powder agglomeration and bridging, and ensure stable feeding. This cooling and mixing process is typically carried out in a cold mixer, where a cooling jacket or a cooling medium (such as cold water or cold air) is used to lower the material temperature, while the agitator continues to mix the materials.

[0029] This application further proposes that in the above-mentioned raw material preparation steps, the raw materials include PVC powder and calcium carbonate, and the weight ratio of PVC powder to calcium carbonate is 1:2 to 1:3. Specifically, PVC powder, as the main polymer substrate of SPC honeycomb panels, provides the material with basic plasticity, toughness, and good processing performance. Limiting the weight ratio of PVC powder to calcium carbonate to the range of 1:2 to 1:3 is based on a comprehensive consideration of the performance and cost of SPC honeycomb panels. When the ratio is 1:2, the filling amount of calcium carbonate is relatively high, which helps to improve the hardness of the panel and reduce costs, while maintaining good processing fluidity. When the ratio is 1:3, the filling amount of calcium carbonate is further increased, which can make the panel obtain higher hardness and density and further reduce costs, but the requirements for the selection of processing aids and the control of process parameters are higher. Within this ratio range, those skilled in the art can optimize and adjust the precise ratio of PVC powder and calcium carbonate according to specific product application requirements, such as the emphasis on compressive strength, flexural modulus, impact toughness, and cost control of the panel.

[0030] This application further proposes a step for configuring the raw materials in step one, which includes: mixing and heating the raw materials; specifically, heating the raw materials to 110℃-125℃, then adding stabilizers, lubricants, toughening agents, and colorants to the raw materials, and then stirring at a speed of 900-1450 r / min until uniformly dried. This heating step aims to pre-treat the initial raw materials. By heating the raw materials to a specific temperature range of 110℃-125℃, trace amounts of moisture that may be present in the raw materials can be effectively removed, avoiding the generation of bubbles or voids during subsequent high-temperature extrusion, thereby ensuring product quality. At the same time, appropriate preheating also helps to improve the flowability of the raw materials, creating favorable conditions for subsequent addition of additives and uniform mixing. This heating process is carried out in a high-speed mixer, and the temperature is precisely controlled to ensure uniform heating of the raw materials.

[0031] After preheating the raw materials, stabilizers, lubricants, toughening agents, and colorants are added. The addition of stabilizers improves the thermal stability of the SPC material during high-temperature processing, prevents polymer chain degradation, and thus ensures the product's mechanical properties and service life. Commonly used stabilizers include calcium-zinc composite stabilizers and organotin stabilizers. Lubricants reduce friction between polymer molecular chains and between the polymer melt and the metal surfaces of the processing equipment, improving material flowability, reducing energy consumption during extrusion, and preventing material adhesion to the screw and die, thereby improving production efficiency and product surface finish. Common lubricants include stearic acid and paraffin wax. Toughening agents are added to improve the impact strength and toughness of the SPC honeycomb panel, making it less prone to cracking under external impact, thus enhancing the product's durability and application range. Chlorinated polyethylene (CPE) or acrylate impact modifiers are commonly used toughening agents. Colorants are used to give the SPC honeycomb panel the desired color and appearance to meet different market demands and decorative effects. Colorants can be various inorganic or organic pigments.

[0032] After adding various additives, high-speed stirring at 900-1450 r / min ensures that all components are fully and uniformly mixed in a short time. The shear force generated by high-speed stirring helps to evenly disperse the additives into the matrix resin, avoiding local enrichment or uneven dispersion. At the same time, the frictional heat generated during stirring also helps to further remove residual moisture from the raw materials, making the mixture reach a "uniformly dry" state, that is, the powder is loose, has good flowability, is free of lumps, and has extremely low moisture content. This uniformly dry mixture is a key guarantee for the stability and product quality of subsequent extrusion molding.

[0033] For step one, this application further proposes that the above-mentioned raw material preparation steps include: cooling and mixing the mixed and heated raw materials; specifically, discharging the mixed and heated raw materials into a cold mixer; and reducing the raw material temperature to below 45°C by air cooling or liquid cooling.

[0034] After the raw materials undergo preliminary mixing and heating, in order to effectively control their temperature and ensure the stability of subsequent processing, this application precisely discharges the mixed and heated raw materials into a cold mixer. By transferring the raw materials from the hot mixer or heating zone to the cold mixer, the raw materials can be prevented from remaining at high temperatures for extended periods, thereby preventing thermal degradation or uneven agglomeration. The stirring action within the cold mixer also helps maintain the homogeneity of the raw materials during the cooling process, ensuring that heat is dissipated evenly and preventing localized overheating or overcooling.

[0035] Lowering the raw material temperature to below 45°C is based on a comprehensive consideration of the characteristics of SPC materials and the requirements of subsequent extrusion processes. This temperature range can effectively inhibit the activity of the raw material, prevent it from being pre-plasticized or degraded before extrusion, and at the same time ensure that the raw material has good flowability and plasticity, laying the foundation for the stable operation of the subsequent twin-screw extruder and the molding of high-quality products.

[0036] This application further proposes that in step two, the melt temperature of the configured raw material in the twin-screw extruder is precisely controlled between 150°C and 185°C. Melt temperature refers to the temperature at which the polymer material reaches a plastic flow state within the extruder. Setting the melt temperature within this specific range aims to ensure that the raw material (e.g., PVC powder, calcium carbonate, etc.) can be fully plasticized to form a uniform melt, while avoiding thermal degradation due to excessively high temperatures or poor plasticization and extrusion difficulties due to excessively low temperatures. Specifically, twin-screw extruders typically have multiple independent heating zones. By precisely controlling the temperature of each heating zone and combining it with the shearing action of the screw, the material reaches and is maintained in a molten state of 150°C-185°C before entering the honeycomb mold.

[0037] like Figure 2 and Figure 3 As shown, this application further proposes that the integrated mold for the skin and honeycomb includes a honeycomb mold and a skin mold. The honeycomb mold is a multi-layered continuous honeycomb structure, and the honeycomb structure is pentagonal or hexagonal. The skin mold has flat gaps, and two skin molds are located on both sides of the honeycomb mold. Specifically, the prepared raw material is melt-extruded through a twin-screw extruder and then passes through the honeycomb mold to obtain strip-shaped honeycomb holes. The internal extrusion channel of the honeycomb mold is designed to have a pentagonal or hexagonal cross-sectional shape. Simultaneously, the prepared raw material is melt-extruded through a twin-screw extruder and then passes through the skin mold to obtain the upper and lower skins. Because the integrated mold for the skin and honeycomb is an integrated structure, the honeycomb core layer and the upper and lower skins are formed simultaneously, thereby realizing the ability to produce the honeycomb board on a large scale and continuously.

[0038] When the honeycomb mold is set to a pentagonal honeycomb structure, its internal channels form continuous pentagonal holes. When the honeycomb mold is set to a hexagonal honeycomb structure, its internal channels form continuous hexagonal holes. The hexagonal honeycomb structure is widely recognized for its excellent mechanical properties. It can achieve maximum strength and stiffness with minimal material, has high specific strength and specific stiffness, and exhibits good isotropy in a plane.

[0039] This application further proposes that step five, which involves placing the skin and the honeycomb core layer into a vacuum chamber for extrusion shaping and cooling, includes: placing the skin and the honeycomb core layer into a vacuum chamber for vacuum adsorption shaping to obtain a shaped honeycomb panel; and cooling the shaped honeycomb panel by liquid cooling.

[0040] Specifically, after the longitudinal structure is formed, the honeycomb core layer, already covered with the outer skin, is entirely placed into a vacuum chamber. Vacuum adsorption shaping refers to creating a negative pressure environment inside the vacuum chamber by drawing a vacuum, allowing external atmospheric pressure to evenly press the outer skin against the honeycomb core layer. This process utilizes the internal and external pressure difference to ensure a tight, seamless fit between the outer skin and the honeycomb core layer, effectively eliminating any air present at the interface and thus avoiding defects such as bubbles and voids. To achieve precise vacuum adsorption, a vacuum pump is typically used, and the vacuum chamber is well-sealed. Furthermore, the vacuum level and adsorption time can be precisely controlled according to material characteristics and product requirements to ensure optimal bonding. In this way, a structurally stable and firmly bonded formed honeycomb panel can be obtained.

[0041] Building upon this, to efficiently and uniformly cool the formed honeycomb panels, this application employs liquid cooling. Liquid cooling refers to using a coolant as a heat transfer medium, exchanging heat with the formed honeycomb panels to remove heat. This can be achieved by setting up coolant circulation channels inside the vacuum chamber wall, or by immediately immersing the formed honeycomb panels in a coolant bath after they leave the vacuum chamber. Compared to traditional air cooling, liquid cooling has higher heat transfer efficiency and stronger cooling capacity, enabling it to rapidly and uniformly reduce the temperature of the formed honeycomb panels, quickly bringing them to the required temperature range for shaping. The type of coolant (such as water, oil, etc.) and temperature can be adjusted according to specific production needs to optimize the cooling effect and speed.

[0042] This application further proposes a sixth step after cooling and vacuum shaping: applying a coating to the cooled, molded honeycomb panel. Specifically, coating is a process for functionally or decoratively treating the surface of an SPC honeycomb panel. Coating refers to attaching a thin film with a specific pattern, color, or function, such as PVC decorative film, PET high-gloss film, or wear-resistant film, to the surface of the panel. This process is achieved through hot or cold pressing. Hot pressing coating uses heating and pressure to fully fuse the film material with the adhesive layer on the panel surface, forming a strong bond; cold pressing coating utilizes pressure-sensitive adhesive film to achieve bonding through roller pressing at room temperature. Coating refers to applying a layer of liquid paint to the panel surface, which cures to form a protective or decorative layer. Various types of paints can be used, such as UV-cured paints, polyurethane paints, or water-based paints, to provide different hardness, gloss, chemical resistance, or environmental performance. Coating processes can employ spraying, roller coating, or curtain coating methods. Before applying the coating, ensure that the surface of the cooled honeycomb panel is clean, dry, and free of oil to ensure good adhesion between the coating and the panel, thereby avoiding defects such as bubbles, delamination, or peeling.

[0043] SPC honeycomb panels have become a key research and development area due to their combination of the environmental friendliness of SPC materials and the lightweight characteristics of honeycomb structures. Their core advantages are significant, including: 1. Excellent environmental performance: SPC panels are made from calcium powder, PVC resin, and environmentally friendly additives, combined with formaldehyde-free composite adhesives, achieving zero formaldehyde release and meeting ENF environmental standards, making them suitable for hospitals, residences, schools, and other scenarios with high environmental requirements; 2. Outstanding waterproof, moisture-proof, and fire-resistant performance: SPC materials themselves have excellent waterproof and moisture-proof properties, allowing for long-term use in kitchens, bathrooms, damp basements, and other environments without deformation or mold. They also achieve a fire rating of B1 or higher, effectively improving safety; 3. Lightweight, high-strength, and dimensionally stable: The sandwich composite structure gives the panels excellent rigidity and bending resistance, with a bending deflection ≤1mm / m. Even in large-size applications (width ≥1500mm), there is no warping or deformation, and the flatness deviation is ≤0.5mm / m; 4. Excellent sound and heat insulation: The closed-cell structure of the honeycomb core can effectively block sound transmission and heat conduction, with a sound insulation of ≥30dB and a low thermal conductivity, which can improve the comfort of indoor living and use.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for large-scale production of longitudinally structured SPC honeycomb panels, characterized in that: At least the following steps are included: Step 1: Prepare the raw materials; Step 2, Fabrication of the outer skin and honeycomb core layer: The prepared raw materials are melt-extruded through a twin-screw extruder and then passed through an integrated mold for the outer skin and honeycomb to obtain the honeycomb core layer and the outer skin. The outer skin covers the upper and lower surfaces of the honeycomb core layer, and the axial directions of the outer skin and the honeycomb core layer are parallel to each other. Step 3, Cooling and Vacuum Shaping: The skin and honeycomb core layer are placed in a vacuum chamber for compression shaping and cooling.

2. The method for large-scale production of SPC honeycomb panels based on a longitudinal structure according to claim 1, characterized in that: In step one, the raw materials for preparation include: Mix and heat the raw materials; The heated raw materials are then cooled and mixed.

3. The method for large-scale production of SPC honeycomb panels based on a longitudinal structure according to claim 1, characterized in that: In step one, the raw materials include PVC powder and calcium carbonate, and the weight ratio of PVC powder and calcium carbonate is 1:2-1:

3.

4. The method for large-scale production of SPC honeycomb panels based on a longitudinal structure according to claim 2, characterized in that: In step one, the mixing and heating of the raw materials includes: The raw material is heated to 110℃-125℃, and then stabilizers, lubricants, toughening agents and colorants are added to the raw material. Then, the mixture is stirred at a speed of 900-1450 r / min until it is uniformly dried.

5. The method for large-scale production of SPC honeycomb panels based on a longitudinal structure according to claim 2, characterized in that: In step one, the cooling and mixing of the heated raw materials includes: The heated raw materials are then discharged into a cold mixer. The raw material temperature is reduced to below 45°C by air cooling or liquid cooling.

6. The process for large-scale production of longitudinally structured SPC honeycomb panels according to claim 1, characterized in that: In step two: the melting temperature of the prepared raw material in the twin-screw extruder is 150℃-185℃.

7. The process for large-scale production of longitudinally structured SPC honeycomb panels according to claim 1, characterized in that: The integrated mold for the skin and honeycomb includes a honeycomb mold and a skin mold. The honeycomb mold is a multi-layered continuous honeycomb structure, and the honeycomb structure is pentagonal or hexagonal. The skin mold is a flat gap, and two skin molds are located on both sides of the honeycomb mold.

8. The process for large-scale production of longitudinally structured SPC honeycomb panels according to claim 1, characterized in that: Step five, which involves placing the skin and honeycomb core layer into a vacuum chamber for extrusion shaping and cooling, includes: The outer skin and the honeycomb core layer are placed in a vacuum chamber for vacuum adsorption and shaping to obtain a shaped honeycomb panel. The molded honeycomb panel is cooled by liquid cooling.

9. The process for large-scale production of longitudinally structured SPC honeycomb panels according to claim 1, characterized in that: It also includes step four, coating: coating the cooled formed honeycomb panel.

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