A method for manufacturing an insulating decorative plate based on a real wood forming process

Abstract

This invention relates to the field of automotive interior parts manufacturing technology, and discloses a method for preparing INS trim panels based on a real wood molding process, comprising the following steps: Step S1: punching and forming an INS film to obtain a pre-formed film blank; Step S2: placing the film blank in a hot pressing fixture for real wood hot pressing molding for hot pressing to obtain a pre-formed film shell; Step S3: placing the pre-formed film shell in an injection mold for real wood injection molding, injecting plastic into the mold for injection molding, so that the plastic and the film shell are integrated to obtain an injection-molded semi-finished product; Step S4: placing the injection-molded semi-finished product in a milling fixture for CNC machining of real wood trim panels for CNC machining to obtain the finished INS trim panel. This invention prepares INS trim panels by using the hot pressing fixture, injection mold, and milling fixture of the real wood trim panel production line, without the need to develop new special molds, effectively saving economic, labor, and time costs, and realizing the efficient utilization of existing assets.

Description

Technical Field

[0001] This application relates to the field of automotive interior parts manufacturing technology, and in particular to a method for preparing INS trim panels based on a real wood molding process. Background Technology

[0002] With the development of the automotive industry and the upgrading of consumption, consumers have increasingly higher requirements for the personalization of car interiors. Decorative trim panels have become an important means to enhance the sense of quality of cars and are widely used in areas such as dashboards, door panels, and center consoles.

[0003] Currently, there are multiple technical routes for manufacturing automotive interior trim panels, mainly including real wood molding and INS (instrument panel) injection molding. Each of these different routes requires independent tooling and mold investment. Taking real wood molding and INS molding as examples, real wood molding requires wood veneer hot pressing tooling and real wood injection molds; INS molding requires diaphragm punching molds, high-pressure molding tooling, and INS injection molds. When manufacturers require INS-specific parts, conventional practice necessitates reinvesting in the development of a complete set of dedicated INS tooling and molds, resulting in high development costs, long development cycles, significant manpower investment, and a lack of competitive product pricing.

[0004] Therefore, it is necessary to develop a method for preparing INS decorative panels, which can ensure the quality of INS decorative panels while solving the problems of high cost, long cycle and large manpower input caused by the need to reinvest in the development of a complete set of special molds for INS decorative panels. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this application provides a method for preparing INS decorative panels based on real wood molding process.

[0006] A method for preparing INS decorative panels based on real wood molding technology includes the following steps: Step S1: The INS membrane is punched and shaped to obtain a pre-formed membrane blank; Step S2: Place the diaphragm blank from step S1 into a hot pressing fixture for hot pressing real wood to obtain a pre-formed diaphragm shell. Step S3: Place the pre-formed diaphragm shell obtained in step S2 into an injection mold for real wood injection molding, inject plastic into the mold for injection molding, so that the plastic and the diaphragm shell are integrated into one piece to obtain an injection-molded semi-finished product. Step S4: Place the injection-molded semi-finished product obtained in step S3 into a milling fixture for CNC machining of real wood veneer panels to obtain the finished INS veneer panel.

[0007] By adopting the above technical solution, this invention utilizes existing hot-pressing tooling, injection molds, and CNC milling tooling in the real wood veneer production line to achieve efficient preparation of INS veneer panels. This method eliminates the need to redevelop a complete set of dedicated INS molds; only adaptive adjustments to existing tooling are required to complete the entire production process from film punching to the final product. Specifically, firstly, this method significantly reduces economic costs. By directly using the hot-pressing tooling, injection molds, and milling tooling from the real wood forming process, it is estimated that a total of 1.1 million yuan in tooling and mold costs have been saved, increasing the profit per unit by 10 yuan, effectively enhancing the product's market competitiveness. Secondly, this method drastically shortens the production cycle, eliminating the design and manufacturing time required for dedicated INS tooling molds, reducing the delivery cycle by more than 50 days. Finally, this method significantly reduces labor input; operators only need basic real wood processing skills to quickly transition to their positions, reducing labor costs. In summary, this process method has good replicability, effectively saving economic, labor, and time costs while ensuring the quality of INS veneer panels, achieving efficient utilization of existing assets.

[0008] Furthermore, the hot pressing process in step S2 includes the following steps: Step S21: Place the membrane blank and the heat insulation film from step S1 into the hot pressing fixture for positioning, and spray water at the inner corner of the membrane blank. Step S22: Place the positioned diaphragm blank together with the hot pressing fixture into a hydraulic hot press for hot pressing; Step S23: After hot pressing is completed, remove the product, remove the heat insulation film, and stack the hot-pressed film shell to set its shape.

[0009] By adopting the above technical solution, in the hot pressing process, step S21, which sequentially positions the diaphragm blank and the heat insulation film and sprays water at the inner corner, effectively prevents the diaphragm from shrinking and shifting during hot pressing. Simultaneously, the water spraying at the corner increases local humidity, avoiding stress concentration that could lead to diaphragm cracking. Step S22 uses a hydraulic hot press for multi-segment speed control, ensuring precise regulation of the mold's downward speed and guaranteeing stable pressure and uniform forming of the diaphragm. Step S23, after hot pressing, promptly removes the heat insulation film and stacks the diaphragm shell for shaping, preventing deformation during cooling. This technical solution significantly improves the yield rate of diaphragm hot pressing and ensures the dimensional stability and surface quality of the diaphragm shell.

[0010] Furthermore, the hydraulic hot press adopts multi-stage speed control. In the first stage, the mold is driven downward at a low speed of 3%-8% of the system's maximum flow rate, so that the mold and the diaphragm blank can make stable contact and prevent the diaphragm blank from being impacted and displaced. In the second stage, the mold is driven downward at a medium speed of 15%-25% of the system's maximum flow rate to apply pressure, so that the diaphragm blank can be fully formed in the hot press fixture, and the pressure is held for 20-30 seconds to solidify and shape the formed diaphragm shell.

[0011] By adopting the above technical solution and using multi-stage speed control of the hydraulic hot press, precise forming and protection of the diaphragm blank is achieved. The first stage drives the mold downwards at a low speed of 3%-8% of the system's maximum flow rate, ensuring flexible contact between the mold core and the diaphragm blank. This effectively avoids diaphragm displacement, wrinkles, or surface scratches caused by rapid pressing in traditional processes. Statistics show that this can reduce the scrap rate due to positioning deviations by approximately 5%. The second stage drives the mold downwards at a medium speed of 15%-25% of the system's maximum flow rate, applying pressure and holding the pressure for 20-30 seconds. This ensures the diaphragm extends uniformly within the cavity, fully replicating the fine texture of the mold surface. Simultaneously, the pressure holding process fully releases and solidifies the internal stress of the formed diaphragm shell, preventing springback deformation after demolding. This segmented speed control strategy significantly improves the dimensional accuracy and yield of hot pressing, ensuring the forming quality of the diaphragm shell in complex curved areas.

[0012] Furthermore, the hot-pressing pressure of the first and second stages is controlled at 80-90 kgf / cm².

[0013] By adopting the above technical solution, the hot pressing pressure of the first and second stages of the hydraulic hot press is precisely controlled within the range of 80-90 kgf / cm². This ensures that the diaphragm blank receives sufficient forming pressure during the hot pressing process, allowing the diaphragm to fully conform to the mold cavity surface and completely replicate the fine texture and complex curved surface structure of the mold. At the same time, it avoids problems such as excessive compression of the diaphragm, uneven thickness, or internal stress concentration caused by excessive pressure. This effectively guarantees the dimensional accuracy, surface quality, and structural stability of the diaphragm shell after hot pressing, laying a good foundation for subsequent injection molding and CNC machining, thereby improving the overall quality and performance of the INS trim panel.

[0014] Furthermore, the injection molding in step S3 includes the following steps: Step S31: Place the preformed film shell obtained in step S2 into the fixed mold cavity of the injection mold used for real wood injection molding and fix it. Step S32: After the mold is closed, the injection molding machine uses a multi-stage injection process to inject plastic into the mold for injection molding; Step S33: After cooling, open the mold and remove the product to obtain the injection-molded semi-finished product.

[0015] By adopting the above technical solution, in the injection molding process, step S31 precisely fixes the pre-formed diaphragm shell into the fixed mold cavity of the injection mold, ensuring that the diaphragm shell and the mold cavity are completely fitted, providing a stable foundation for subsequent plastic filling; step S32 injects a plastic mixture with a specific ratio after mold closing, utilizing the fluidity of the plastic melt to fully fill the cavity space on the back of the diaphragm shell, so that the plastic and the diaphragm shell form a strong mechanical interlocking structure; step S33, after cooling and solidification, the mold is opened and the injection-molded semi-finished product is removed. At this time, the plastic and the diaphragm shell have achieved an integrated bond through melt bonding and mechanical interlocking. This process effectively solves the problem of insufficient bonding strength between the diaphragm and the plastic in the traditional INS process by precisely controlling the three key links of diaphragm shell positioning, plastic filling, and cooling and shaping.

[0016] Further, the plastic injected in step S32 comprises the following components by weight: 60-80 parts PC resin, 20-40 parts ABS resin, 2-5 parts compatibilizer, 3-8 parts toughening agent, 0.5-1.5 parts antioxidant, and 0.3-1.0 parts lubricant.

[0017] By adopting the above technical solution, the composition of the PC / ABS alloy injection molding compound was optimized. PC resin, as the main substrate, provides excellent high-temperature deformation resistance and rigid support, ensuring the trim panel maintains dimensional stability under long-term heat exposure environments such as automotive interiors. The addition of ABS resin significantly improves melt flowability, enabling it to quickly fill thin-walled cavities at lower injection pressures, effectively avoiding high-pressure damage to the diaphragm caused by excessive flow resistance. The compatibilizer improves the compatibility of the PC and ABS two-phase interface, while enhancing the affinity between the plastic melt and the inner surface of the diaphragm, ensuring a strong chemical bond between the plastic layer and the diaphragm shell after molding, preventing delamination during subsequent use or environmental changes. The toughening agent imparts good impact toughness to the substrate, making the final product less prone to brittleness upon accidental impact. Through the synergistic effect of its components, this formulation significantly reduces the risk of diaphragm damage while ensuring sufficient mechanical properties in the plastic substrate, improving the stability of the injection molding process and the product yield.

[0018] Furthermore, the compatibilizer is a maleic anhydride-grafted ethylene-octene copolymer, and the toughening agent is a methyl methacrylate-butadiene-styrene copolymer.

[0019] By employing the above technical solution, maleic anhydride-grafted ethylene-octene copolymer is used as a compatibilizer. The maleic anhydride groups in its molecular structure can chemically react with the terminal hydroxyl groups of PC resin. Simultaneously, the ethylene-octene copolymer segments have good compatibility with the rubber phase of ABS resin, thus forming a stable chemical bond layer at the PC / ABS alloy interface. This effectively reduces the interfacial tension between the two phases and improves the interfacial bonding strength. Methyl methacrylate-butadiene-styrene copolymer is used as a toughening agent. The butadiene rubber phase in its molecular chain can absorb and disperse impact energy, while the methyl methacrylate and styrene hard segments provide good rigid support. This improves the material's impact resistance while maintaining the mechanical strength of the substrate. This combined use of compatibilizer and toughening agent significantly enhances the bonding force between the PC / ABS alloy and the film during injection molding, effectively improving the quality of the injection-molded semi-finished product.

[0020] Furthermore, in step S32, the injection molding adopts a multi-stage injection process, including: the first stage injection speed is 45%-60% of the maximum speed, the injection pressure is 110bar-130bar, and the injection reaches a position 70mm-90mm away from the top of the mold cavity; the second stage injection speed is 75%-90% of the maximum speed, the injection pressure is 135bar-155bar, and the injection reaches a position 14mm-34mm away from the top of the mold cavity; the third stage injection speed is 35%±10% of the maximum speed, the injection pressure is 105bar±10%, and the injection reaches a position until the mold cavity is completely filled.

[0021] By adopting the above technical solution, the multi-stage injection molding process achieves progressive filling of the plastic melt into the mold cavity through phased control of injection speed and pressure. The first stage uses medium-low speed injection to ensure the melt smoothly enters the mold cavity and establishes basic pressure, avoiding diaphragm displacement or surface scratches caused by high-speed impact. The second stage increases injection speed and pressure to ensure the melt quickly fills the central area of ​​the mold cavity, preventing cold material formed by cooling and solidification from affecting the surface quality of the product. The third stage reduces injection speed to complete the filling at the end of the mold cavity with low speed and low pressure, avoiding excessive shearing of the melt and generating internal stress, while also preventing shrinkage cavities or bubbles from appearing at the top of the mold cavity due to insufficient pressure. Through the coordinated operation of the three injection stages, this process ensures that the melt maintains a stable and orderly flow state throughout the filling process, with uniform stress on the diaphragm shell and no local overload, guaranteeing the consistency of the injection molded semi-finished product quality.

[0022] Furthermore, after the multi-segment injection is completed, the system switches to the pressure holding stage, with a pressure of 20-40 bar, a holding time of 1.5-3.5 seconds, and a cooling time of 15-25 seconds.

[0023] By adopting the above technical solution, the holding pressure and cooling parameters after injection molding were specifically optimized. Specifically, a holding pressure of 20-40 bar for 1.5-3.5 seconds allows for appropriate shrinkage compensation during melt cooling and contraction, preventing shrinkage marks or depressions on the product surface. Simultaneously, it avoids excessive internal stress caused by high-pressure holding, effectively reducing the risk of product warping and diaphragm cracking. A cooling time of 15-25 seconds ensures complete shaping of the plastic substrate, preventing warping due to residual stress during mold opening. Precise control of pressure and time parameters during the holding pressure stage ensures good dimensional stability and appearance integrity of the injection-molded semi-finished product after demolding, providing high-quality injection-molded semi-finished products for subsequent CNC machining.

[0024] Furthermore, the INS film is a plastic film printed with a decorative pattern, which may be a wood grain pattern, a brushed metal pattern, or a carbon fiber pattern, and the film thickness is 0.4-0.6 mm.

[0025] By adopting the above technical solution, the INS film uses a plastic film printed with decorative patterns. It can be customized with diverse patterns such as wood grain, brushed metal, or carbon fiber to meet the interior style requirements of different car models, achieving personalized decorative effects. The 0.4-0.6mm film thickness design ensures pattern clarity while also taking into account the ductility and tear resistance during the hot pressing process. This allows for the complete replication of the fine textures on the mold surface while avoiding injection molding damage caused by an excessively thin film or weak bonding caused by an excessively thick film. This film selection scheme, by balancing decorativeness, processability, and reliability, provides a stable quality foundation for the final trim panel product.

[0026] In summary, this application includes at least the following beneficial technical effects: 1. The method for preparing INS decorative panels based on real wood molding process of the present invention utilizes the existing tooling of real wood decorative panel production line, without the need to redevelop a complete set of INS-specific molds, and only makes adaptive adjustments, to realize the complete production process of INS decorative panels from film punching to finished products. While ensuring the quality of INS decorative panels, it significantly reduces economic costs, shortens the production cycle, and reduces manpower input.

[0027] 2. In the hot pressing process, this invention improves the yield of diaphragm hot pressing by controlling reasonable steps and parameters, such as positioning water spray, multi-segment speed control, and precise pressure control, ensuring the dimensional stability and surface quality of the diaphragm shell, and laying a good foundation for subsequent processes.

[0028] 3. In the injection molding process, this invention effectively solves the problem of insufficient bonding strength between the film and plastic in the traditional INS process by optimizing the plastic formula, implementing multi-stage injection technology, and precisely controlling the holding pressure and cooling parameters. This improves the stability of the injection molding process and the yield of the finished product, ensuring the quality of the injection-molded semi-finished product, and thus guaranteeing the quality of the finished INS decorative panel. Attached Figure Description

[0029] Figure 1 This is a process flow diagram of a method for preparing INS decorative panels based on real wood molding technology provided in an embodiment of the present invention; Figure 2 This is a process flow diagram of step S2 of a method for preparing INS decorative panels based on real wood molding process provided in an embodiment of the present invention; Figure 3 This is a process flow diagram of step S3 of a method for preparing INS decorative panels based on real wood molding process provided in an embodiment of the present invention; Detailed Implementation

[0030] The following combination Figure 1-3 The technical solutions in the embodiments of the present invention will be described in detail.

[0031] See Figure 1-3 This embodiment provides a method for preparing INS decorative panels based on real wood molding technology, including the following steps: Step S1: The INS membrane is punched and shaped to obtain a pre-formed membrane blank; Step S2: Place the diaphragm blank from step S1 into a hot pressing fixture for hot pressing real wood to obtain a pre-formed diaphragm shell. Step S3: Place the pre-formed diaphragm shell obtained in step S2 into an injection mold for real wood injection molding, inject plastic into the mold for injection molding, so that the plastic and the diaphragm shell are integrated into one piece to obtain an injection-molded semi-finished product. Step S4: Place the injection-molded semi-finished product obtained in step S3 into a milling fixture for CNC machining of real wood veneer panels to obtain the finished INS veneer panel.

[0032] As an optional implementation, the INS film is a plastic film printed with decorative patterns such as wood grain, brushed metal, or carbon fiber patterns, and the film thickness is 0.4-0.6 mm.

[0033] Specifically, in step S1, an INS film with a wood grain pattern printed on it is selected. The film thickness is 0.4-0.6mm. The film is placed in a laser cutting machine to punch the INS film. After punching, the surface of the film blank is cleaned to remove dust, oil and other impurities, so as to obtain a pre-formed film blank to ensure good adhesion between the film and the mold during hot pressing.

[0034] Furthermore, the hot pressing process in step S2 includes the following steps: Step S21: Place the membrane blank and the heat insulation film from step S1 into the hot pressing fixture for positioning, and spray water at the inner corner of the membrane blank. Step S22: Place the positioned diaphragm blank together with the hot pressing fixture into a hydraulic hot press for hot pressing. The hydraulic hot press adopts multi-stage speed control. Step S23: After hot pressing is completed, remove the product, remove the heat insulation film, and stack the hot-pressed film shell to set its shape.

[0035] To improve the quality of the hot pressing of the diaphragm blank, in step S22, the hydraulic hot press adopts multi-stage speed control. In the first stage, the mold is driven downward at a low speed of 3%-8% of the system's maximum flow rate to ensure smooth contact between the mold and the diaphragm blank and prevent the diaphragm blank from being impacted and displaced. In the second stage, the mold is driven downward at a medium speed of 15%-25% of the system's maximum flow rate to apply pressure, so that the diaphragm blank is fully formed in the hot pressing fixture, and the pressure is held for 20-30 seconds to solidify and set the formed diaphragm shell. The hot pressing pressure in the first and second stages is controlled at 80-90 kgf / cm².

[0036] Preferably, in this embodiment, during the first stage of hot pressing, the mold descends at a low speed of 5% of the system's maximum flow rate to ensure smooth contact between the mold and the diaphragm blank, preventing the diaphragm blank from being impacted and displaced. In the second stage of hot pressing, the mold descends at a medium speed of 20% of the system's maximum flow rate to apply pressure, allowing the diaphragm blank to be fully formed within the hot pressing fixture. Pressure is maintained for 20-30 seconds to solidify and set the formed diaphragm shell. The hydraulic hot press has a rated maximum flow rate of 50 L / min, and the hot pressing pressure in both the first and second stages is controlled at 80 kgf / cm².

[0037] Furthermore, the injection molding in step S3 includes the following steps: Step S31: Place the preformed film shell obtained in step S2 into the fixed mold cavity of the injection mold used for real wood injection molding and fix it. Step S32: After the mold is closed, the injection molding machine uses a multi-stage injection process to inject plastic into the mold for injection molding; Step S33: After cooling, open the mold and remove the product to obtain the injection-molded semi-finished product.

[0038] To further optimize the injection molding effect, the plastic injected in step S32 includes the following components by weight: 60-80 parts PC resin, 20-40 parts ABS resin, 2-5 parts compatibilizer, 3-8 parts toughening agent, 0.5-1.5 parts antioxidant, and 0.3-1.0 parts lubricant.

[0039] The compatibilizer is maleic anhydride-grafted ethylene-octene copolymer, and the toughening agent is methyl methacrylate-butadiene-styrene copolymer.

[0040] Preferably, the injected plastic comprises the following components by weight: 70 parts PC resin, 30 parts ABS resin, 3 parts compatibilizer, 5 parts toughening agent, 1 part antioxidant, and 0.5 parts lubricant. The INS trim panel prepared using the formula of this embodiment has a strong bond between the film and the plastic substrate. The adhesion test by cross-cut test shows a grade of 0 with no delamination or peeling. The product shows no change in appearance after a thermal cycling test from -30°C to 80°C, meeting the requirements for use in automotive interior parts.

[0041] To ensure the effectiveness of injection molding and the quality of the injection-molded semi-finished products, step S32 employs a multi-stage injection process, including: a first stage injection speed of 55% of the maximum speed and an injection pressure of 120 bar, injecting to a position 70mm-90mm from the top of the mold cavity; a second stage injection speed of 85% of the maximum speed and an injection pressure of 145 bar, injecting to a position 14mm-34mm from the top of the mold cavity; and a third stage injection speed of 35% of the maximum speed and an injection pressure of 105 bar, injecting until the mold cavity is completely filled. In this embodiment, the maximum speed of the injection molding machine is 150mm / s. Through the speed and pressure control of the above multi-stage injection, the filling of the plastic melt in the mold cavity can be more stable and orderly, further ensuring the consistency of the injection-molded semi-finished product quality.

[0042] Furthermore, after the multi-stage injection is completed, the process switches to the holding pressure stage, with a holding pressure of 30 bar, a holding time of 1.5 seconds, and a cooling time of 20 seconds. This ensures that the injection-molded semi-finished product maintains good dimensional stability and appearance integrity after demolding, providing a better foundation for subsequent CNC machining.

[0043] Further, in step S4, the injection-molded semi-finished product obtained in step S3 is placed in a milling fixture for CNC machining of real wood veneer panels. The machining program of the five-axis CNC machining center is set according to the product drawing requirements. The injection-molded semi-finished product is milled, hole-making and edge finishing are performed, injection flash and gate residue are removed, and functional structures such as installation buckle holes are machined. After machining, surface debris is removed to obtain INS veneer panel finished products with accurate dimensions and smooth edges.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for preparing INS decorative panels based on real wood molding process, characterized in that... This includes the following steps: Step S1: The INS membrane is punched and shaped to obtain a pre-formed membrane blank; Step S2: Place the diaphragm blank from step S1 into a hot pressing fixture for hot pressing real wood to obtain a pre-formed diaphragm shell. Step S3: Place the pre-formed diaphragm shell obtained in step S2 into an injection mold for real wood injection molding, inject plastic into the mold for injection molding, so that the plastic and the diaphragm shell are integrated into one piece to obtain an injection-molded semi-finished product. Step S4: Place the injection-molded semi-finished product obtained in step S3 into a milling fixture for CNC machining of real wood veneer panels to obtain the finished INS veneer panel.

2. The method for preparing INS decorative panels based on real wood molding process according to claim 1, characterized in that: The hot pressing process in step S2 includes the following steps: Step S21: Place the membrane blank and the heat insulation film from step S1 into the hot pressing fixture for positioning, and spray water at the inner corner of the membrane blank. Step S22: Place the positioned diaphragm blank together with the hot pressing fixture into a hydraulic hot press for hot pressing; Step S23: After hot pressing is completed, remove the product, remove the heat insulation film, and stack the hot-pressed film shell to set its shape.

3. The method for preparing INS decorative panels based on real wood molding process according to claim 2, characterized in that: The hydraulic hot press adopts multi-stage speed control. In the first stage, the mold is driven downward at a low speed of 3%-8% of the system's maximum flow rate to ensure smooth contact between the mold and the diaphragm blank and prevent the diaphragm blank from being impacted and displaced. In the second stage, the mold is driven downward at a medium speed of 15%-25% of the system's maximum flow rate to apply pressure, so that the diaphragm blank is fully formed in the hot press fixture, and the pressure is held for 20-30 seconds to solidify and shape the formed diaphragm shell.

4. The method for preparing INS decorative panels based on real wood molding process according to claim 3, characterized in that: The hot-pressing pressure for the first and second stages is controlled at 80-90 kgf / cm².

5. The method for preparing INS decorative panels based on real wood molding process according to claim 1, characterized in that: The injection molding process in step S3 includes the following steps: Step S31: Place the preformed film shell obtained in step S2 into the fixed mold cavity of the injection mold used for real wood injection molding and fix it. Step S32: After the mold is closed, the injection molding machine uses a multi-stage injection process to inject plastic into the mold for injection molding; Step S33: After cooling, open the mold and remove the product to obtain the injection-molded semi-finished product.

6. A method for preparing INS decorative panels based on real wood molding process according to claim 5, characterized in that: The plastic injected in step S32 comprises the following components by weight: 60-80 parts PC resin, 20-40 parts ABS resin, 2-5 parts compatibilizer, 3-8 parts toughening agent, 0.5-1.5 parts antioxidant, and 0.3-1.0 parts lubricant.

7. The method for preparing INS decorative panels based on real wood molding process according to claim 6, characterized in that: The compatibilizer is a maleic anhydride-grafted ethylene-octene copolymer, and the toughening agent is a methyl methacrylate-butadiene-styrene copolymer.

8. The method for preparing INS decorative panels based on real wood molding process according to claim 5, characterized in that: In step S32, the injection molding process employs a multi-stage injection process, including: the first stage injection speed is 45%-60% of the maximum speed, the injection pressure is 110-130 bar, and the injection reaches a position 70mm-90mm from the top of the mold cavity; the second stage injection speed is 75%-90% of the maximum speed, the injection pressure is 135-155 bar, and the injection reaches a position 14mm-34mm from the top of the mold cavity; the third stage injection speed is 35%±10% of the maximum speed, the injection pressure is 105bar±10%, and the injection reaches a position until the mold cavity is completely filled.

9. The method for preparing INS decorative panels based on real wood molding process according to claim 1, characterized in that: After the multi-stage injection is completed, the system switches to the pressure holding stage, with a pressure of 20-40 bar, a holding time of 1.5-3.5 seconds, and a cooling time of 15-25 seconds.

10. The method for preparing INS decorative panels based on real wood molding process according to claim 1, characterized in that: The INS film is a plastic film printed with decorative patterns, such as wood grain patterns, brushed metal patterns, or carbon fiber patterns, and the film thickness is 0.4-0.6 mm.

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