A production line for processing wood-plastic acoustic panels

Abstract

This invention discloses a production line for processing wood-plastic composite sound-absorbing panels, comprising: a raw material pretreatment system, a plasticizing extrusion system, a cooling and shaping system, a cutting system, and a testing system, sequentially connected and controlled by a central control system. The testing system includes: an appearance inspection module, a size inspection module, a physical performance testing module, an automatic rejection device, and a data traceability system. The friction and wear testing device includes: a base shell, a cover shell, a sub-controller, a friction testing mechanism, a first vision sensor, a handling robotic arm, a mounting groove, and a scratch testing mechanism. This production line for processing wood-plastic composite sound-absorbing panels, through optimized collaboration between production and testing, enables long-term continuous batch production and solves the problems of low accuracy, strong subjectivity, and low efficiency in testing the physical performance of wood-plastic composite sound-absorbing panels. It can accurately capture the wear rate, scratch resistance durability, and coating peeling of samples.

Description

Technical Field

[0001] This invention relates to the field of wood-plastic composite sound-absorbing board processing technology, specifically to a production line for processing wood-plastic composite sound-absorbing boards. Background Technology

[0002] Currently, the existing technologies in the production and testing of wood-plastic composite sound-absorbing panels have a low level of automation. Existing technologies rely heavily on manual labor for core processes such as raw material proportioning, sample transfer, and testing. The lack of automated coordination mechanisms in process integration makes it difficult to achieve long-term continuous mass production, limiting production efficiency. Furthermore, the accuracy and comprehensiveness of testing are insufficient. Existing testing technologies mainly rely on manual visual inspection of appearance and measurement of dimensions using simple tools. For the testing of core physical properties such as friction and wear, scratch resistance, etc., single and extensive testing methods are often used, lacking quantitative testing capabilities, resulting in low testing accuracy, high subjectivity, and an inability to accurately capture subtle defects and performance deviations. Moreover, the testing dimensions are limited, making it difficult to achieve comprehensive quality control, which can easily lead to unqualified products entering the market and posing potential quality risks. Summary of the Invention

[0003] The purpose of this invention is to provide a production line for processing wood-plastic acoustic panels, so as to at least solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a production line for processing wood-plastic composite sound-absorbing panels, comprising: a raw material pretreatment system, a plasticizing extrusion system, a cooling and shaping system, a cutting system, and a detection system, which are sequentially connected and controlled by a central control system. Each system works in concert to achieve automated processing and quality control of the wood-plastic composite sound-absorbing panels, specifically including: The detection system is connected to the output end of the cutting system and is used to realize full-dimensional quality inspection and rejection of defective products of wood-plastic acoustic panels. It includes: an appearance inspection module, a size inspection module, a physical performance inspection module, an automatic rejection device, and a data traceability system. The appearance inspection module includes multiple industrial cameras and a color difference detector. The size inspection module includes a laser thickness gauge and a laser displacement sensor. The physical performance inspection module includes a water absorption rate tester, a standing wave tube sound absorption coefficient tester, and a friction and wear testing device. The automatic rejection device is linked with each inspection module and is used to automatically separate defective products. The data traceability system is used to record production and inspection data and supports querying and exporting. The friction and wear testing device includes: Base casing; The outer casing is installed on the top outer side of the base casing; The sub-controller is mounted on the top front side of the outer shell of the enclosure via a bracket; The friction testing mechanism is located on the top right side of the base housing; The first visual sensor is mounted on the top of the base housing and located outside the friction testing mechanism. The first visual sensor is electrically connected to the sub-controller. A handling robotic arm is mounted on the top of the base housing and located on the outer left side of the friction testing mechanism. The handling robotic arm is electrically connected to the sub-controller. The mounting slot is formed on the top left side of the base housing in a reverse direction along the left and right sides; The scratch testing mechanism is located inside the mounting slot.

[0005] Preferably, the friction testing mechanism includes: a base frame, a horizontal moving module, a first linear moving module, a dual-station workpiece tray, a second linear moving module, and an electric lifting frame; the base frame is fixedly installed on the top right side of the base housing in the front-to-back direction, and the base frame is L-shaped; the horizontal moving module is fixedly installed on the top of the base frame in the front-to-back direction, and the horizontal moving module is electrically connected to a sub-controller; the first linear moving module is fixedly installed on the top of the moving end of the horizontal moving module in the left-to-right direction, and the first linear moving module is electrically connected to a sub-controller; the dual-station workpiece tray is installed on the top of the moving end of the first linear moving module; the second linear moving module is installed in the middle of the front top of the base frame in the up-down direction, and the second linear moving module is electrically connected to a sub-controller; the electric lifting frame is installed on the front side of the moving end of the second linear moving module, and the electric lifting frame is electrically connected to a sub-controller.

[0006] Preferably, the friction testing mechanism further includes: a tank shell, a mounting frame, a double-headed crank seat, a first connecting rod, a single-headed crank seat, a second connecting rod, a first motor, and a worm gear assembly; the tank shell is fixedly installed at the bottom of the lifting end of the electric lifting frame; the mounting frame is installed in the middle of the inner top of the tank shell; there are two double-headed crank seats, which are respectively rotatably installed on the front and rear sides of the bottom end of the mounting frame via a rotating shaft; the front and rear ends of the first connecting rod are respectively rotatably installed above the front and rear double-headed crank seats via a rotating shaft; the single-headed crank seat is rotatably installed on the left side of the bottom end of the mounting frame via a rotating shaft, and the single-headed crank seat and the two front and rear double-headed crank seats on the right side are arranged in a triangular orientation; the two ends of the second connecting rod are respectively rotatably installed above the single-headed crank seat and the front double-headed crank seat via a rotating shaft; the first motor is fixedly installed on the left side of the bottom end of the mounting frame, and the first motor is electrically connected to the sub-controller; in the worm gear assembly, the worm wheel is installed on the outer side of the top of the shaft of the single-headed crank seat, and the worm of the worm gear assembly is installed on the rotating end of the first motor.

[0007] Preferably, the friction testing mechanism further includes: a grinding disc, a driven gear, a transmission gear, a second motor, and a drive gear; the grinding disc has three parts, which are rotatably mounted on the outer bottom of the front and rear double-headed crank seats and the single-headed crank seat via rotating shafts; the driven gear has three parts, which are keyed to the top outer side of the shaft of the three grinding discs; the transmission gear has three parts, which are rotatably mounted on the bottom outer side of the shaft of the front and rear double-headed crank seats and the single-headed crank seat at the connection position with the mounting frame via bearings, and the three transmission gears mesh with the three driven gears on the three sides; the second motor is fixedly mounted on the inner top of the mounting frame, the rotating end of the second motor extends to the lower surface of the mounting frame, and the second motor is electrically connected to the sub-controller; the drive gear is fixedly mounted on the bottom of the rotating end of the second motor, and the outer side of the drive gear meshes with the inner side of the three transmission gears.

[0008] Preferably, the scratch testing mechanism includes: a third linear movement module, a single-station workpiece tray, scratch simulation components, a second vision sensor, a dual-axis movement module, and an adhesive tape applicator; the third linear movement module is fixedly installed at the bottom of the inner cavity of the mounting slot in the left-right direction, and the third linear movement module is electrically connected to the sub-controller; the single-station workpiece tray is installed on the top of the moving end of the third linear movement module; there are two scratch simulation components, which are respectively installed on the top of the base shell and located at the upper right left and right ends of the third linear movement module; the second vision sensor is installed on the top of the base shell via a bracket and located at the front left of the mounting slot, and the second vision sensor is electrically connected to the sub-controller; the dual-axis movement module is installed on the top of the base shell via a bracket and located at the rear left of the mounting slot, and the dual-axis movement module is electrically connected to the sub-controller; the adhesive tape applicator is installed on the right side of the moving end of the dual-axis movement module and is electrically connected to the sub-controller.

[0009] Preferably, the scratch simulation component includes: an arc-shaped slide rail, a pulley seat, a rotating seat, a housing, and a third motor; the arc-shaped slide rail is fixedly installed on the top of the housing of the base in the left-right direction and is located outside the mounting groove on the right rear side; the pulley seat is installed on the top of the inner cavity of the arc-shaped slide rail; the rotating seat is installed on the top of the housing of the base and is located outside the mounting groove on the right front side, and is symmetrically arranged with the arc-shaped slide rail in the front and back direction; the housing is installed on the top of the rotating end of the rotating seat in the front-back direction, and the rear side of the housing is fixedly connected to the top of the front side of the pulley seat; the third motor is installed on the front end of the housing, the rotating end of the third motor is fixedly connected to the axis of the rotating seat, and the third motor is electrically connected to the sub-controller.

[0010] Preferably, the scratch simulation component further includes: a slide rail, a slider, a scribing blade, a lead screw assembly, and a fourth motor; the slide rail is fixedly installed at the top of the housing in the front-to-back direction, and the bottom end of the inner cavity of the slide rail communicates with the top of the inner cavity of the housing; the slider is installed in the inner cavity of the slide rail, and the bottom end of the slider extends into the inner cavity of the housing; the scribing blade is installed on the left side of the top of the slider in the vertical direction; the lead screw of the lead screw assembly is installed in the inner cavity of the housing in the front-to-back direction, and the lead screw nut of the lead screw assembly is fixedly connected to the bottom end of the slider; the fourth motor is installed on the rear side of the outer surface of the housing, the rotating end of the fourth motor extends into the inner cavity of the housing, and is fixedly connected to the rear end of the lead screw shaft of the lead screw assembly; the fourth motor is electrically connected to the sub-controller.

[0011] Compared with the prior art, the beneficial effects of the present invention are: 1. Wood flour is pre-treated and crushed. PVC resin and composite additives are stored separately in dedicated storage silos. An automatic feeding device precisely feeds the materials according to a preset ratio. After the raw materials are dried to the required moisture content in a dryer, they are fed into a high-speed mixer for uniform mixing. The mixture is then stored in a constant-temperature, anti-caking storage tank for pre-treatment. The mixture in the storage tank is then fed into a twin-screw extruder via an automatic feeder. The extruder uses segmented temperature control to melt and plasticize the raw materials. After the molten material is filtered to remove minute impurities, it is fed into a dedicated gradient flow die to extrude a continuous wood-plastic sound-absorbing board substrate, which is then directly fed into… In the cooling and shaping system, the high-temperature substrate first enters the vacuum shaping table, where it is initially shaped under vacuum adsorption and constant temperature to ensure a smooth surface. Then, it enters the cooling water tank for secondary water cooling to quickly lock in the dimensions. After being synchronously pulled by the sheet traction machine, the surface moisture is dried by the air dryer and sent to the cutting system. The continuously cooled and dried substrate is smoothly fed by the automatic feeding device, and the deviation correction device prevents deviation. The length positioning device detects the feeding length in real time. When the preset finished product length is reached, the CNC cutting saw is triggered for precise cutting. The cutting debris is collected and recycled by the dust removal device. The cut finished sheet is sent to the inspection system via the conveyor.

[0012] 2. Staff members place two samples to be tested into the dual-station workpiece tray through the inlet of the outer shell. The first linear movement module drives the dual-station workpiece tray to move under the transport robot arm. The transport robot arm picks up one sample and places it into the single-station workpiece tray. At the same time, the third motor of the scratch simulation component on the left and right sides drives the outer shell, which is arranged in a V-shape with the cooperation of the pulley seat and the arc-shaped slide rail. The third linear movement module drives the single-station workpiece tray to move the sample from right to left. The fourth motor drives the scribing knife to move back and forth, cutting a grid-like scratch on the sample surface. The sample is moved to the underside of the dual-axis movement module, and the tape pasting module completes the tape pasting of the grid area. Then it is moved to the underside of the second vision sensor to collect images. The sub-controller uses image algorithms to detect whether the coating has peeled off or cracked.

[0013] 3. The dual-station workpiece tray (containing another sample) is moved below the electric lifting frame via a horizontal movement module. The electric lifting frame lowers the tank shell and three grinding discs to fit against the sample surface. The second motor drives the drive gear, which in turn rotates the three grinding discs through the transmission gear and driven gear, rubbing and grinding the sample surface. If the grinding area needs to be adjusted, the first motor drives the three grinding discs radially through the worm gear assembly, crank seat, and connecting rod, maintaining their meshing to adjust the grinding range. After grinding, the sample is moved below the first vision sensor to acquire images. The sub-controller analyzes the sample's wear rate and scratch resistance durability curve using image algorithms. After the inspection, the dual-station workpiece tray is moved to the entrance of the housing shell for easy sample removal by staff.

[0014] By optimizing the entire production and testing process, core processes can be completed without human intervention. From raw material pretreatment, continuous extrusion, cooling and cutting to full-dimensional testing, all processes can be automatically and collaboratively operated through preset programs, significantly reducing labor costs and enabling long-term continuous batch production. This effectively breaks through the efficiency bottleneck of traditional production and solves the problems of low accuracy, strong subjectivity, and low efficiency in the physical performance testing of wood-plastic acoustic panels. It achieves automated and quantitative testing of physical performance, accurately capturing sample wear rate, scratch resistance durability, and coating peeling, avoiding subjective judgment bias in manual testing. At the same time, testing and production can be carried out simultaneously, solving the problems of traditional testing methods being unable to adapt to batch production, having long testing cycles, and being unable to provide timely feedback on potential quality issues. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the friction and wear testing device; Figure 3 for Figure 2 Internal structure diagram; Figure 4 for Figure 3 Exploded view of the friction testing mechanism; Figure 5 for Figure 4 Enlarged view of point A; Figure 6 for Figure 3 Exploded view of the scratch testing facility; Figure 7 for Figure 6 Exploded view of the scratch testing facility.

[0016] In the diagram: 1. Base housing, 2. Cover housing, 3. Sub-controller, 4. Friction testing mechanism, 41. Base frame, 42. Horizontal movement module, 43. First linear movement module, 44. Dual-station workpiece tray, 45. Second linear movement module, 46. Electric lifting frame, 47. Tank housing, 48. Mounting bracket, 49. Double-headed crank seat, 410. First connecting rod, 411. Single-headed crank seat, 412. Second connecting rod, 413. First motor, 414. Worm gear assembly, 415. Grinding disc, 416. Driven gear, 417. Transmission. 418. Gear, 419. Second motor, 410. Drive gear, 5. First vision sensor, 6. Handling robotic arm, 7. Mounting slot, 8. Scratch testing mechanism, 81. Third linear movement module, 82. Single-station workpiece tray, 83. Second vision sensor, 84. Dual-axis movement module, 85. Tape pasting module, 96. Scratch simulation component, 97. Arc slide rail, 98. Pulley seat, 99. Rotating seat, 90. Housing, 910. Third motor, 92. Slide rail, 93. Sliding knife, 94. Lead screw assembly, 95. Fourth motor. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7 This invention provides a technical solution: a production line for processing wood-plastic composite sound-absorbing panels, comprising: a raw material pretreatment system, a plasticizing extrusion system, a cooling and shaping system, a cutting system, and a detection system, which are sequentially connected and controlled by a central control system. Each system works together to achieve automated processing and quality control of the wood-plastic composite sound-absorbing panels, specifically including: The raw material pretreatment system is used to remove impurities, dry, accurately proportion, and uniformly mix wood-plastic raw materials. It includes: a wood powder pretreatment device, multiple raw material storage silos, an automatic feeding device, a raw material dryer, a high-speed mixer, and a mixed material storage tank connected in sequence. The wood powder pretreatment device is equipped with a vibrating screen and a magnetic separator to remove impurities from the wood powder and pulverize it to a preset particle size. The wood powder pretreatment device is standardly equipped with a three-layer vibrating screen, a strong magnetic roller separator, a hammer mill, an online particle size analyzer, a pulse dust collector, and a non-conforming material return channel. The three-layer vibrating screen can grade and remove large particles such as stones and sawdust clumps from the wood powder, while the strong magnetic roller separator adsorbs iron filings, etc. Metal impurities are eliminated. The hammer mill crusher precisely crushes wood flour to a preset particle size. An online particle size analyzer monitors the particle size of the crushed wood flour in real time. Wood flour that does not meet the standard is re-crushed through a return channel. A pulse dust collector collects the wood flour flying during processing, improving the production environment. Multiple raw material storage silos are configured with multiple independent silos according to the type of raw material. Each silo is equipped with a high-sensitivity level sensor, an electric anti-bridging agitator, and sealed inlet and outlet electromagnetic control valves. The level sensor collects the remaining material in the silo in real time. When the remaining material is lower than the preset value, it sends a material shortage alarm to the central control system. The electric anti-bridging agitator operates at low speed to prevent the raw material from arching and clogging. The sealed inlet prevents the raw material from getting damp and dusty. The electromagnetic control valve at the feed inlet is linked with the subsequent automatic feeding device to achieve precise quantitative feeding of raw materials. The automatic feeding device is equipped with a weight sensor to control the accuracy of the raw material ratio. The automatic feeding device uses a multi-path automatic feeder, configured with multiple independent stainless steel conveying pipelines, a high-precision weight sensor, a variable frequency speed-regulating motor, an electromagnetic vibrating feeder, a pipeline anti-blocking sensor, and a feeding quantity calibration module. Multiple conveying pipelines can simultaneously convey wood powder, PVC resin, and composite additives. The weight sensor accurately measures the feeding quantity of each raw material in real time, strictly matching the preset ratio. The variable frequency speed-regulating motor can adjust the feeding speed according to the requirements of subsequent processes. The electromagnetic vibrating feeder prevents raw materials from accumulating at the pipeline inlet end, and the anti-blocking sensor... The system monitors the material conveying status within the pipeline in real time, immediately alarming and initiating vibration to clear blockages. The feeding quantity calibration module can automatically calibrate the metering accuracy periodically to ensure long-term accurate feeding ratios. The high-speed mixer uses a dual-propeller structure to achieve uniform mixing of raw materials. The raw material dryer is a horizontal hot air circulating raw material dryer, equipped with a double-layer stainless steel drying chamber, a variable frequency hot air circulating fan, a high-precision humidity detector, and an automatic temperature control system. The double-layer drying chamber can dry wood powder and PVC resin simultaneously. The raw material distribution scraper ensures that the raw material is evenly spread within the drying chamber, avoiding local accumulation that could lead to uneven drying. The variable frequency hot air circulating fan provides a stable airflow, and the automatic temperature control system precisely controls the drying temperature at the specified temperature.The high-speed mixer is equipped with a stainless steel twin-propeller stirring structure, a jacketed temperature control device, a high-precision timer switch, a pneumatic discharge valve, a dustproof sealing cover, a cleaning scraper for the mixing chamber wall, and an online mixing uniformity detection module. The stainless steel twin propellers feature a double-layered rotation design; the inner propeller lifts the raw materials upwards, while the outer propeller pushes them downwards, achieving three-dimensional mixing. The jacketed temperature control device adjusts the mixing temperature according to the raw material characteristics, preventing additives from failing due to excessive temperature. The timer switch precisely controls the mixing time, the pneumatic discharge valve delivers materials quickly and without residue, and the cleaning scraper prevents raw materials from adhering to the mixing chamber wall. The online mixing uniformity detection module monitors the mixing status in real time and automatically extends the mixing time if the target is not met. The mixed material storage tank is equipped with a heat-insulating and anti-caking stirring device. The material storage tank is equipped with a polyurethane insulation layer, a low-speed anti-caking stirring device, a high-temperature resistant material level sensor, a temperature sensor, a constant temperature control module, an in-tank moisture-proof breather valve, and a discharge buffer device. The polyurethane insulation layer, together with the constant temperature control module, keeps the temperature of the mixture in the tank stable at the specified temperature, preventing temperature fluctuations from causing the mixture to clump. The low-speed anti-caking stirring device adopts a paddle-type structure to gently stir the mixture, preventing clumping without damaging the uniformity of the raw material mixture. The high-temperature resistant material level sensor monitors the remaining amount of the mixture in the tank in real time, providing a material quantity signal for the connection between the raw material pretreatment system and the plasticizing extrusion system. The moisture-proof breather valve balances the air pressure in the tank and prevents external moisture from entering. The discharge buffer device ensures that the mixture falls smoothly into the subsequent automatic feeder, avoiding raw material bridging and metering deviation caused by excessively fast discharge. The plasticizing extrusion system, connected to the discharge end of the mixed material storage tank of the raw material pretreatment system, is used to melt and plasticize the mixed raw materials and extrude them into a continuous wood-plastic sound-absorbing board substrate. It includes: an automatic feeder, a twin-screw extruder, a melt filter, a special mold for wood-plastic sound-absorbing boards, and a temperature control system. The automatic feeder is a screw-type automatic feeder, standardly equipped with a variable frequency speed control motor, a material flow stabilizer, an anti-clogging sensor, and a material level linkage module. The variable frequency speed control motor can accurately match the speed of the twin-screw extruder to achieve quantitative and stable material supply. The anti-clogging sensor monitors the material status in the material channel in real time; when clogging occurs, it triggers vibration to clear the blockage and sends an alarm signal to the central control system. The material level linkage module is linked with the material level sensor of the mixed material storage tank, which can automatically adjust the feeding rate according to the material quantity in the tank. The twin-screw extruder adopts a segmented temperature control structure. The twin-screw extruder is a conical twin-screw extruder with a three-stage temperature control structure consisting of a feeding section, a melting section, and a homogenization section. It is equipped with a high-power servo drive motor, torque sensor, melt pressure sensor, and barrel cooling water circuit as standard. The torque and melt pressure sensors can collect the internal operating data of the extruder in real time and feed it back to the central control system. When the parameters are abnormal, the system automatically adjusts the screw speed. The barrel cooling water circuit and the electric heating system work together to achieve precise temperature control of each section. The screw is made of wear-resistant alloy material. The material is suitable for processing wood flour with high filler content, ensuring stable extrusion volume and no unmelted particles in the molten material. The melt filter is used to filter out minute impurities in the molten material. The melt filter is a hydraulic melt filter, specifically designed for filtering minute impurities in wood-plastic composite molten materials. It comes standard with an 80-mesh double-layer stainless steel filter screen, a pressure differential detection sensor, a bypass pipeline, and an online screen replacement mechanism. The double-layer filter screen improves the impurity filtration effect. The pressure differential detection sensor monitors the pressure difference before and after the filter screen in real time. When the pressure difference exceeds the standard, it issues a filter screen replacement alarm signal. The bypass pipeline, in conjunction with the online screen replacement mechanism, allows the filter screen to be replaced without stopping the production line, avoiding interruptions during production. The special mold adopts a replaceable die lip design, and the die opening flow channel is set as a gradient to achieve uniform melt distribution. The special mold for wood-plastic sound-absorbing board uses a customized wood-plastic sound-absorbing board extrusion mold. The quick-release die lip can be quickly disassembled and replaced. The gradient die opening flow channel is streamlined to reduce melt flow resistance and make the wood-plastic molten material evenly distributed in the die opening. The mold has regular sound-absorbing pore forming ribs reserved in the mold, which can directly extrude wood-plastic substrate with sound-absorbing pores. The mold is equipped with a constant temperature heating coil, a mold temperature sensor and a die opening fine adjustment device. The heating coil provides uniform heating for the mold body, the mold temperature sensor monitors the mold body temperature in real time, and the die opening fine adjustment device can accurately adjust the forming thickness of the board.The temperature control system adopts an intelligent segmented temperature control system, which is equipped with a multi-channel intelligent temperature controller, high-temperature resistant electric heating coil, stainless steel cooling water pipe, temperature monitoring module and automatic temperature control actuator as standard. Independent temperature control loops are configured for the feeding section, melting section, homogenization section of the twin-screw extruder and the special mold for wood-plastic sound-absorbing board. The temperature monitoring module can collect the temperature data of each temperature control point in real time and upload it to the central control system. The automatic temperature control actuator automatically adjusts the heating power of the electric heating coil or the water flow rate of the cooling water pipe according to the temperature deviation value to achieve precise segmented temperature control. At the same time, it provides constant temperature control for the special mold to avoid the molten material cooling down and solidifying in the mold, which would affect the extrusion molding effect. The cooling and shaping system, connected to the die outlet of the plasticizing extrusion system, is used to cool and shape the extruded high-temperature wood-plastic composite board and remove surface moisture. It includes: a vacuum shaping table, a cooling water tank, a board traction machine, and a dryer connected in sequence. The vacuum shaping table is equipped with a vacuum sensor and a silicone sealing gasket. The standard configuration of the vacuum shaping table includes an integrated vacuum tank, a high-precision vacuum sensor, a high-temperature resistant and wear-resistant food-grade silicone sealing gasket, a constant-temperature shaping table surface, multi-zone vacuum adsorption chambers, and an automatic vacuum adjustment module. The silicone sealing gasket tightly adheres to the contact edge between the table body and the board to ensure the vacuum chamber is sealed. The constant-temperature shaping table surface allows for precise temperature control. At a specified temperature, the multi-zone vacuum adsorption chamber can be flexibly opened according to the width of the sheet material. The automatic vacuum adjustment module is linked to the extruder speed to adjust the vacuum level in real time. The cooling water tank is equipped with a water circulation chiller unit to stably control the water temperature. The cooling water tank is equipped with a fully enclosed water circulation chiller unit, multi-stage water temperature monitoring sensors, a variable frequency speed control water pump, an automatic water level replenishment device, and a polyurethane-based guide roller assembly. The water circulation chiller unit can stably control the water temperature at the specified temperature, the variable frequency water pump can achieve stepless adjustment of the water flow speed, the multi-stage water temperature sensors monitor the water temperature in different areas of the tank in real time, the guide plate ensures uniform water flow without dead zones in the tank, and the polyurethane guide rollers... The assembly reduces friction during substrate transport and prevents scratches on the substrate surface. The sheet metal traction machine is equipped with a speed sensor and tension adjustment device to ensure synchronization between traction and extrusion speeds. The sheet metal traction machine is a double-roller type, standardly equipped with a servo drive motor, high-precision incremental speed sensor, hydraulic tension adjustment device, wear-resistant rubber-coated traction rollers, and a double-roller synchronous transmission structure. The speed sensor collects the traction speed in real time and feeds it back to the central control system. The hydraulic tension adjustment device can flexibly adjust the traction force. The wear-resistant rubber-coated traction rollers increase friction with the substrate to prevent slippage and deviation. The air dryer is a double-sided sheet metal air dryer, standardly equipped with a centrifugal high-pressure blower. It features multiple sets of symmetrical adjustable air outlets, a constant temperature hot air heating module, a wind speed adjustment module, and a substrate air curtain positioning device. Additional dustproof nets and residue-blowing vents are added to the air outlets. A centrifugal high-pressure blower provides adjustable wind speed. The constant temperature hot air heating module controls the air outlet temperature to a specified level. The symmetrical air outlets allow for simultaneous drying of both sides of the wood-plastic substrate. The adjustable design adapts to boards of different thicknesses and widths. The air curtain positioning device limits the substrate's position during drying to prevent conveying deviation. The dustproof net prevents airborne dust from being blown onto the substrate surface. The residue-blowing vents blow away fine wood-plastic debris adhering to the substrate surface, ensuring surface cleanliness. The cutting system, connected to the air dryer outlet of the cooling and shaping system, is used to cut the continuously shaped sheet metal into finished products of a preset length. It includes: an automatic feeding device, a length positioning device, a CNC cutting saw, a cutting dust removal device, and a finished product conveyor. The automatic feeding device is standardly equipped with a variable frequency servo motor, a high-precision photoelectric correction sensor, wear-resistant polyurethane feeding rollers, and a feeding speed synchronization module. It also includes an adjustable limit guide plate to prevent sheet metal deviation, a roller surface residual material cleaning scraper, and a sheet metal buffer support. The variable frequency servo motor enables precise synchronization of the feeding speed with the traction machine. The photoelectric correction sensor... The device monitors and adjusts the board conveying position in real time. Polyurethane feeding rollers prevent scratching the substrate surface. Adjustable limit guides adapt to different widths of wood-plastic composite boards. Cleaning scrapers remove wood-plastic residue adhering to the roller surface in real time. A buffer platform prevents warping during board conveying, ensuring smooth and uninterrupted feeding throughout the process. The length positioning device is equipped with a photoelectric sensor and a length counter to trigger the CNC cutting saw for precise automatic cutting. The length positioning device uses a laser length positioning device and comes standard with a high-precision laser photoelectric sensor, electronic length counter, CNC positioning signal trigger module, and multiple sets of length parameter presets. The system includes a storage module, a board placement sensor, a signal delay compensation module, and an anti-reflective detection lens. A laser photoelectric sensor accurately detects the board's conveying displacement. The preset storage module can save various finished product length parameters. The placement sensor ensures the board is fully positioned before sending the cutting signal. The delay compensation module compensates for positioning errors caused by the board's conveying inertia, accurately triggering the CNC cutting saw for automatic fixed-length cutting. The anti-reflective lens prevents surface reflection from affecting detection accuracy. The CNC cutting saw is equipped with an anti-chipping saw blade and a saw blade cooling device. The CNC cutting saw comes standard with a servo drive motor and a wood-plastic composite-specific... Anti-chipping alloy saw blade, saw blade high-pressure water cooling device, CNC cutting stroke adjustment module, saw blade speed real-time monitoring sensor, pneumatic plate clamping device, cutting depth fine adjustment mechanism and emergency stop braking module. Servo drive motor drives the saw blade to maintain a stable speed. The anti-chipping alloy saw blade effectively avoids edge burrs and chipping problems when cutting wood-plastic composite boards. The high-pressure water cooling device continuously cools and lowers the temperature of the saw blade, extending its service life. The pneumatic clamping device firmly fixes the board during cutting to prevent movement from affecting cutting accuracy. The cutting depth fine adjustment mechanism is adapted to wood-plastic sound-absorbing boards of different thicknesses.The cutting dust removal device is used to collect the debris generated during the cutting process. The cutting dust removal device adopts an industrial cutting-specific dust removal device, which is equipped with a high negative pressure centrifugal fan, a large-diameter arc-shaped dust suction hood, a sealed dust collection box, a dust filter, a height-adjustable dust suction hood mechanism, a filter clogging alarm sensor, a wood-plastic composite debris recycling and conveying channel, and a dust removal airflow adjustment module. The arc-shaped dust suction hood fits tightly against the cutting station to achieve seamless collection of cutting debris. The high negative pressure centrifugal fan provides strong suction. The height-adjustable dust suction hood mechanism is adapted to wood-plastic composite boards of different thicknesses. The filter clogging alarm sensor monitors the filter status in real time and issues a cleaning reminder in time. The debris recycling and conveying channel can directly transport the collected wood-plastic composite debris to the wood powder pretreatment device to realize the secondary utilization of raw materials. The airflow adjustment module can adjust the suction power according to the cutting conditions to avoid energy waste. The finished product conveyor is equipped with a frequency-controlled polyurethane conveyor roller, a pneumatic positioning baffle, a seamless connection guide module for the inspection station, anti-slip limit blocks for the sheet metal, a finished product arrival sensor, a conveyor speed matching module, a tabletop residual cleaning brush, and a sheet metal anti-collision buffer pad. The polyurethane conveyor roller prevents scratches on the surface of the cut finished sheet metal. The frequency conversion speed control function can adjust the conveyor speed to precisely match the feeding speed of the inspection system. The pneumatic positioning baffle can automatically and neatly arrange the cut finished sheet metal to prevent chaotic accumulation. The connection guide module ensures that the sheet metal is accurately conveyed to the corresponding station of the inspection system. The anti-slip limit blocks prevent the sheet metal from shifting during the conveying process. The finished product arrival sensor feeds back the sheet metal position signal to the central control system in real time. The cleaning brush removes residual material from the tabletop in real time. The buffer pad prevents the sheet metal from hard contacting the equipment and causing collision damage. The detection system, connected to the finished product conveyor output end of the cutting system, is used to realize full-dimensional quality inspection of wood-plastic acoustic panels and rejection of defective products. It includes: an appearance inspection module, a size inspection module, a physical performance inspection module, an automatic rejection device, and a data traceability system. The appearance inspection module includes multiple industrial cameras and a color difference detector. The size inspection module includes a laser thickness gauge and a laser displacement sensor. The physical performance inspection module includes a water absorption rate tester, a standing wave tube sound absorption coefficient tester, and a friction and wear testing device. The automatic rejection device is linked with each inspection module to automatically separate defective products. The data traceability system is used to record production and inspection data and supports querying and exporting. The central control system is controlled by a PLC and is electrically connected to the raw material pretreatment system, plasticizing extrusion system, cooling and shaping system, cutting system and detection system respectively. It is used to control the operating parameters of each system, realize the coordinated linkage of each system, and is equipped with abnormal alarm and emergency shutdown functions to ensure the stable operation of the production line. The friction and wear testing device includes: a base shell 1, a cover shell 2, a sub-controller 3, a friction testing mechanism 4, a first vision sensor 5, a handling robotic arm 6, a mounting slot 7, and a scratch testing mechanism 8. The base shell 1 has pre-reserved integrated wiring channels and equipment mounting holes. The bottom is equipped with four adjustable shock-absorbing feet to effectively buffer vibrations during operation, preventing vibrations from affecting testing accuracy. The feet are also height-adjustable to ensure the base is placed stably and adaptable to workshop floors with varying flatness. The top of the base is divided into pre-defined installation areas for each component, precisely matching the installation dimensions of the cover shell 2, friction testing mechanism 4, and handling robotic arm 6. To ensure the coaxiality and positional accuracy of all components after assembly, the outer casing 2 is installed on the top outer side of the base casing 1. The outer casing 2 is a matching casing, constructed from transparent PC sheet and a stainless steel frame. A dedicated sample inlet is located at the front of the casing, equipped with a grating sensor. The sub-controller 3 is mounted on the top front side of the outer casing 2 via a bracket. The sub-controller 3 is equipped with a color touchscreen, supporting manual setting of test parameters, starting and stopping of test programs, viewing test data and fault alarm information. It has built-in pre-programmed tests and can automatically control the coordinated movement of components. The built-in image analysis module can receive image data and quickly analyze and process it to generate test reports; it is equipped with an RS485 communication interface, which can be linked with the central control system of the production line to upload test data in real time; the friction testing mechanism 4 is located on the top right side of the base shell 1; the first vision sensor 5 is installed on the top of the base shell 1 and located outside the friction testing mechanism 4. The first vision sensor 5 is electrically connected to the sub-controller 3. The first vision sensor 5 is a high-definition industrial vision sensor, which is fixed by an adjustable bracket. The bracket can be adjusted up and down, left and right to ensure that the lens of the first vision sensor 5 is accurately aligned with the test area of ​​the dual-station workpiece tray 44. The system can collect image data of the sample surface after friction and wear testing in real time and quickly transmit it to the sub-controller 3; the handling robotic arm 6 is installed on the top of the base shell 1 and located on the outer left side of the friction testing mechanism 4. The handling robotic arm 6 and the sub-controller 3 are electrically connected. The handling robotic arm 6 is a multi-axis linkage handling robotic arm equipped with a mechanical gripper. The gripper has a pressure sensor and can adjust the clamping force to avoid damaging the sample due to excessive suction or causing the sample to fall off due to excessive suction. It can accurately complete the gripping, transfer and placement of the sample according to the pre-made program; the mounting groove 7 is opened on the top left side of the base shell 1 in both left and right directions; the scratch testing mechanism 8 is set inside the mounting groove 7.

[0019] As a preferred option, further, such as Figure 4 and Figure 5As shown, the friction testing mechanism 4 includes: a base frame 41, a horizontal movement module 42, a first linear movement module 43, a dual-station workpiece tray 44, a second linear movement module 45, an electric lifting frame 46, a tank housing 47, a mounting frame 48, a double-headed crank seat 49, a first connecting rod 410, a single-headed crank seat 411, a second connecting rod 412, a first motor 413, a worm gear assembly 414, a grinding disc 415, a driven gear 416, a transmission gear 417, a second motor 418, and a drive gear 419; the base frame 41 is fixedly installed on the top right side of the base housing 1 in the front-back direction, and the base frame 41 is L-shaped; the horizontal movement module 42 is fixedly installed on the top of the base frame 41 in the front-back direction, and the horizontal movement module 43 ... is L-shaped. Block 42 and sub-controller 3 are electrically connected. The horizontal movement module 42 is a linear movement module with a belt drive structure, which can precisely drive the first linear movement module 43 and the dual-station workpiece tray 44 to move back and forth, realizing the switching of samples between the gripping station and the polishing station. The first linear movement module 43 is fixedly installed on the top of the moving end of the horizontal movement module 42 in the left and right direction. The first linear movement module 43 is electrically connected to the sub-controller 3. The first linear movement module 43 is a precision linear module with a ball screw drive, which can drive the dual-station workpiece tray 44 to move left and right, realizing the precise alignment of samples with the handling robot arm 6 and the first vision sensor 5, meeting the requirements of sample transfer and image acquisition. The dual-station workpiece tray 44 is installed on The first linear moving module 43 is located at the top of its moving end; the second linear moving module 45 is installed vertically at the center of the top front of the base frame 41. The second linear moving module 45 is electrically connected to the sub-controller 3. The second linear moving module 45 is a vertical linear module with a ball screw drive structure and is equipped with an anti-fall device. It can stably drive the electric lifting frame 46 to move up and down, precisely adjust the distance between the grinding disc 415 and the sample surface, and link the electric lifting frame 46 to achieve precise alignment, ensuring uniform grinding pressure. The electric lifting frame 46 is installed on the front side of the moving end of the second linear moving module 45. The electric lifting frame 46 is electrically connected to the sub-controller 3. The electric lifting frame 46 is a miniature electric lifting frame with DC servo drive and is equipped with pressure transmission. The sensor can detect the contact pressure between the polishing disc 415 and the sample surface in real time and feed it back to the sub-controller 3 to automatically adjust the lifting height to avoid excessive pressure damaging the sample or insufficient pressure affecting the test accuracy. The bottom is reserved for the fixed installation position of the tank shell 47. The tank shell 47 is fixedly installed at the bottom of the lifting end of the electric lifting frame 46. The mounting frame 48 is installed in the middle of the top of the tank shell 47. There are two double-headed crank seats 49. The two double-headed crank seats 49 are respectively installed on the front and rear sides of the bottom end of the mounting frame 48 through the rotating shaft. Under the linkage of the first connecting rod 410 and the second connecting rod 412, the double-headed crank seats 49 can rotate around the rotating shaft to make a fixed axis, driving the polishing disc 415 to move along the arc trajectory to realize the adjustment of the polishing area.The front and rear ends of the first connecting rod 410 are rotatably mounted above the front and rear double-headed crank seats 49 via rotating shafts. The single-headed crank seat 411 is rotatably mounted on the bottom left side of the mounting bracket 48 via rotating shafts. The single-headed crank seat 411 and the two front and rear double-headed crank seats 49 on the right side are arranged in a triangular orientation. The single-headed crank seat 411 can rotate under the drive of the worm gear assembly 414, driving the second connecting rod 412 to link with the front double-headed crank seat 49. The two ends of the second connecting rod 412 are rotatably mounted above the single-headed crank seat 411 and the front double-headed crank seat 49 via rotating shafts. The second connecting rod 412 can transmit the rotational motion of the single-headed crank seat 411 to the front double-headed crank seat 49, and at the same time cooperate with the first connecting rod 410 to achieve... The synchronous rotation of the three crank seats ensures the synchronous radial movement of the three grinding discs 415, maintaining transmission stability and precision. The first motor 413 is fixedly mounted on the bottom left side of the mounting bracket 48. The first motor 413 is electrically connected to the sub-controller 3. The first motor 413 is a servo motor equipped with an absolute encoder, which can precisely drive the worm gear to rotate according to the instructions of the sub-controller 3, thereby driving the worm wheel and the single-head crank seat 411 to rotate, realizing the adjustment of the grinding area of ​​the grinding disc 415. In the worm gear assembly 414, the worm wheel is mounted on the outer side of the top of the shaft of the single-head crank seat 411, and the worm of the worm gear assembly 414 is mounted on the rotating end of the first motor 413. The worm gear assembly 414 converts the rotational motion of the first motor 413 into... The single-head crank seat 411 rotates on its fixed axis. Three grinding discs 415 are mounted on the outer bottom of the two double-head crank seats 49 and the single-head crank seat 411 via rotating shafts. The grinding discs 415 are wood-plastic composite grinding discs with specially treated surfaces, allowing for uniform friction and grinding of the wood-plastic sound-absorbing panel sample surface, simulating wear conditions during actual use and adapting to the testing needs of samples of different specifications. Three driven gears 416 are keyed to the top outer side of the shaft of each of the three grinding discs 415. Three transmission gears 417 are mounted on the two double-head crank seats via bearings. At the bottom outer side of the shaft where the single-head crank seat 411 connects to the mounting bracket 48, three transmission gears 417 mesh with three driven gears 416 on each side. A second motor 418 is fixedly mounted on the inner top of the mounting bracket 48, with its rotating end extending to the lower surface of the mounting bracket 48. The second motor 418 is electrically connected to the sub-controller 3. The second motor 418 is a servo motor equipped with a high-precision encoder, capable of precisely controlling the rotational speed. It can adjust the rotational speed of the grinding disc 415 according to the instructions of the sub-controller 3, adapting to testing requirements of different wear intensities. A drive gear 419 is fixedly mounted at the bottom of the rotating end of the second motor 418, with its outer side meshing with the inner side of the three transmission gears 417.

[0020] As a preferred option, further, such as Figure 6 As shown, the scratch testing mechanism 8 includes: a third linear movement module 81, a single-station workpiece tray 82, a scratch simulation component 9, a second vision sensor 83, a dual-axis movement module 84, and a tape-adhesive module 85. The third linear movement module 81 is fixedly installed at the bottom of the inner cavity of the mounting groove 7 in the left-right direction. The third linear movement module 81 is electrically connected to the sub-controller 3. The third linear movement module 81 uses a precision linear movement module with a ball screw transmission structure, equipped with a home reset function and front and rear limit switches, which can accurately drive the single-station workpiece tray 82 to move smoothly left and right, realizing the switching of the sample between the scratch, tape-adhesive, and image acquisition stations. The tray 82 is mounted on top of the moving end of the third linear moving module 81; there are two scratch simulation components 9, which are respectively mounted on the top of the base housing 1 and located on the upper right side of the exterior of the third linear moving module 81; the second vision sensor 83 is mounted on the top of the base housing 1 via a bracket and is located on the front left side of the exterior of the mounting slot 7. The second vision sensor 83 is electrically connected to the sub-controller 3. The second vision sensor 83 is a high-definition industrial vision sensor, mounted on the top of the base housing 1 via an adjustable stainless steel bracket, and equipped with a ring light to provide uniform lighting in the shadow areas inside the equipment, avoiding light affecting the image. For high-precision data acquisition, the bracket can be adjusted vertically and horizontally to ensure the lens is precisely aligned with the sample testing area of ​​the single-station workpiece tray 82. Real-time data transmission of collected image data of sample scratches and tape-adhesive areas is transmitted to the sub-controller 3 for determining coating peeling and cracking. The dual-axis movement module 84 is mounted on the top of the base housing 1 via a bracket, located on the outer left rear of the mounting slot 7. The dual-axis movement module 84 is electrically connected to the sub-controller 3. The module is mounted on the top of the base housing 1 via an L-shaped stainless steel bracket. The module adopts an X / Y dual-axis ball screw drive structure, equipped with limit switches and overload protection devices, and can precisely drive the tape-adhesive module 85. The tape application module 85 can be adjusted vertically and horizontally to ensure precise alignment with the sample surface, adapting to the tape application needs of samples with different thicknesses and widths. The tape application module 85 is installed on the right side of the moving end of the dual-axis moving module 84. The tape application module 85 is electrically connected to the sub-controller 3. The tape application module 85 has a built-in replaceable tape roll, equipped with a precision pressure roller and a tape cutting mechanism, which can automatically complete the stretching, application, and cutting of the tape. The pressure of the pressure roller can be adjusted by the sub-controller 3 to ensure that the tape adheres tightly to the grid scratch area of ​​the sample surface without air bubbles, avoiding poor adhesion that may affect the test results. After application, it can automatically reset to wait for the next application task.

[0021] As a preferred option, further, such as Figure 7As shown, the scratch simulation component 9 includes: an arc-shaped slide rail 91, a pulley seat 92, a rotating seat 93, a housing 94, a third motor 95, a slide rail 96, a slider 97, a scribing blade 98, a lead screw assembly 99, and a fourth motor 910. The arc-shaped slide rail 91 is fixedly installed on the top of the base housing 1 in the left-right direction and is located outside the mounting groove 7 on the right rear. The pulley seat 92 is installed on the top of the inner cavity of the arc-shaped slide rail 91. The pulley seat 92 can slide smoothly along the arc-shaped slide rail 91 with the housing 94, assisting the housing 94 in angle adjustment and supporting the housing 94 to ensure that the housing 94 does not shift or shake during rotation. The rotating seat 93 is installed on the top of the base housing 1 and is located outside the mounting groove 7 on the right front, and is connected to the arc-shaped slide rail 91. The rotating base 93, symmetrically arranged front and rear, can drive the outer shell 94 to rotate around its own axis under the drive of the third motor 95. The outer shell 94 is mounted on the top of the rotating end of the rotating base 93 along the front-rear direction, and the rear side of the outer shell 94 is fixedly connected to the top of the front side of the pulley seat 92. The third motor 95 is mounted on the front end of the outer shell 94, and the rotating end of the third motor 95 is fixedly connected to the axis of the rotating base 93. The third motor 95 is electrically connected to the sub-controller 3. The third motor 95 is a micro servo motor equipped with a high-precision absolute encoder, which can accurately control the rotation angle and drive the rotating base 93 to rotate the outer shell 94 around the arc-shaped slide rail 91, thereby adjusting the angle of the outer shell 94 and thus adjusting the scratching angle of the scribing knife 98 to adapt to the scribing of different specifications of wood-plastic sound-absorbing panels. The test requires a grooving track 96, which is fixedly installed on the top of the outer shell 94 in the front-to-back direction. The bottom of the inner cavity of the grooving track 96 is connected to the top of the inner cavity of the outer shell 94. A slider 97 is installed in the inner cavity of the grooving track 96, with its bottom end extending into the inner cavity of the outer shell 94. A scribing blade 98 is installed on the top left side of the slider 97 in the vertical direction. The scribing blade 98 is a diamond scribing blade specifically for wood-plastic composites, with an adjustable blade angle to accommodate scribing tests of different depths. The blade shank is made of stainless steel, and its length is adapted to the installation height of the slider 97. The blade extension length can be adjusted according to the test requirements to precisely control the scribing depth. The scribing blade 98 and the slider 97 are fixed with locking bolts, ensuring a secure installation. The scribing blade 98 can move back and forth with the slider 97. The surface is cut with uniform scratches to meet the requirements of making grid-like scratches; the lead screw of the lead screw assembly 99 is installed in the inner cavity of the housing 94 along the front-to-back direction, and the lead screw nut of the lead screw assembly 99 is fixedly connected to the bottom end of the slider 97; the fourth motor 910 is installed on the rear side of the outer surface of the housing 94, and the rotating end of the fourth motor 910 extends into the inner cavity of the housing 94 and is fixedly connected to the rear end of the lead screw shaft of the lead screw assembly 99. The fourth motor 910 is electrically connected to the sub-controller 3. The fourth motor 910 is a micro servo motor equipped with a high-precision encoder, which can accurately control the rotation speed and number of revolutions, and can drive the lead screw of the lead screw assembly 99 to rotate intermittently clockwise or counterclockwise, thereby driving the slider 97 and the scribing knife 98 to move back and forth.

[0022] The working principle is as follows: Step 1: The working process of the raw material pretreatment system: After the raw material pretreatment system is started, impurities are removed and particle size is met through classification and pretreatment of wood-plastic raw materials. Wood powder raw materials are fed into the wood powder pretreatment device. The vibrating screen in this device screens the wood powder to remove large particles of impurities. At the same time, the magnetic separator adsorbs metal impurities in the wood powder to avoid subsequent equipment wear and product defects. The screened and magnetically separated wood powder is crushed to the preset particle size, completing the wood powder pretreatment. PVC resin and composite additives are loaded into the corresponding raw material storage bins. Each storage bin feeds back the material level information to the central control system in real time to ensure sufficient raw materials. The automatic feeding device accurately controls the conveying amount of each raw material according to the raw material ratio preset by the central control system through weight sensors. The raw materials are smoothly conveyed to the raw material dryer via an electromagnetic vibrating feeder. The raw material dryer starts the hot air circulation system and adjusts the temperature to the specified temperature to achieve simultaneous drying of wood flour and PVC resin. The humidity detector monitors the moisture content of the raw materials in real time until the moisture content drops to the threshold. After drying, the raw materials are conveyed to the high-speed mixer. The high-speed mixer stirs and mixes the raw materials to ensure that the composite additives are evenly dispersed in the wood flour and PVC resin. After mixing, the mixture is sent to the mixture storage tank through the discharge valve. The mixture storage tank stores the mixture at a constant temperature. At the same time, the internal anti-caking stirring device runs continuously at low speed to prevent the mixture from clumping. The material level sensor of the mixture storage tank provides real-time feedback on the material quantity information to ensure a stable supply for the subsequent plasticizing extrusion system. Step 2, Working process of the plasticizing extrusion system: After the raw material pretreatment system is completed, the central control system triggers the start of the plasticizing extrusion system. The mixture in the mixture storage tank is smoothly fed into the feeding section of the twin-screw extruder through the automatic feeder. Under the control of the central control system, the twin-screw extruder achieves segmented temperature control through the temperature control system and operates at a preset speed to extrude, melt, and plasticize the fed mixture. After plasticization, the molten material passes through the melt filter, which filters out tiny impurities in the molten material to prevent impurities from clogging the mold or affecting the surface quality of the product. The filtered molten material is sent into a special mold for wood-plastic sound-absorbing panels. The molten material is extruded through the die orifice of the mold to form a continuous wood-plastic sound-absorbing panel substrate. The extruded continuous substrate is directly sent to the subsequent cooling and shaping system. Step 3: Working process of the cooling and shaping system: The continuous wood-plastic composite substrate extruded from the plasticizing extrusion system is fed into the vacuum shaping table of the cooling and shaping system. After the vacuum shaping table is started, the vacuum tank adjusts the vacuum level inside the table to the specified value. The silicone sealing gasket ensures the airtightness inside the table. Through vacuum adsorption, the high-temperature wood-plastic composite substrate is tightly adhered to the shaping table surface. The temperature of the shaping table surface is controlled at the specified temperature, achieving the initial cooling and shaping of the substrate. The vacuum sensor monitors the vacuum level inside the table in real time to ensure the shaping effect. After the initial shaping, the substrate is sent to the cooling water tank. The cooling water tank stably controls the water temperature at the specified temperature and achieves uniform water temperature distribution through the water circulation system, performing a secondary shaping of the substrate. Cooling rapidly reduces the internal temperature of the substrate to prevent deformation during subsequent cutting and inspection. After cooling, the substrate is fed into the sheet traction machine. The speed sensor of the traction machine detects the traction speed and links it with the extrusion speed of the extruder fed back by the central control system. The traction force is adjusted by the tension adjustment device to ensure that the traction speed and the extrusion speed are synchronized, so as to prevent the substrate from being stretched or twisted and deformed. The traction substrate is then sent to the air dryer. The air dryer blows air on the surface of the substrate through multiple sets of air outlets to quickly dry the residual moisture on the surface of the substrate, so as to prevent the sheet from slipping or the surface from oxidizing during subsequent cutting. The continuous substrate with a dry and flat surface after air drying is directly sent into the cutting system. Step 4: The working process of the cutting system: After cooling and shaping, the continuous substrate is fed into the cutting system through an automatic feeding device. The feeding speed of the automatic feeding device is synchronized with the speed of the traction machine. The correction device adjusts the conveying position of the substrate in real time to avoid substrate deviation affecting the cutting accuracy. The photoelectric sensor of the length positioning device detects the conveying length of the substrate in real time, and the length counter records the conveying distance synchronously. When the conveying length of the substrate reaches the finished product length preset by the central control system, the length positioning device immediately sends a signal to the central control system to trigger the CNC cutting saw to start. The CNC cutting saw operates at a specified speed, and its equipped anti-chipping saw blade accurately cuts the continuous substrate. The saw blade cooling device cools the saw blade in real time. The wood-plastic debris generated during the cutting process is collected by the cutting dust removal device. This device sucks the debris into the dust collection box through a dust hood and dust removal pipe. After the cutting is completed, the finished board is sent into the finished product conveying table. The finished product conveying table is transported smoothly at a specified speed. The connecting device of the finished product conveying table accurately transports the finished board to the detection station of the detection system. Step 5: The working process of the inspection system: After the cut finished boards are sent into the inspection system, the central control system triggers each inspection module to start synchronously, realizing full-dimensional quality inspection of the finished boards. The specific working process is as follows: Step 1, Appearance Inspection: The finished board first passes through the appearance inspection module. Multiple sets of industrial cameras scan the surface of the board comprehensively. The AI ​​recognition algorithm automatically identifies defects such as scratches, bubbles, impurity protrusions, chipped edges, and burrs on the surface of the board. At the same time, the color difference detector detects the color of the board surface and compares the detection results with the standard color plate. The appearance inspection data is uploaded to the central control system in real time. Step 2, Dimension Inspection: After passing the appearance inspection, the board material enters the dimension inspection module. The laser thickness gauge detects the thickness of the board material in real time at a specified sampling frequency, the laser displacement sensor detects the width and length of the board material, and at the same time detects the flatness of the board material surface. The dimension inspection data is fed back to the central control system in real time. Step 3, Physical Performance Testing: After the dimensions of the boards pass inspection, samples are sent to the physical performance testing module according to a preset ratio. The water absorption rate tester tests the water absorption rate of the boards using the vacuum saturation method, and the standing wave tube sound absorption coefficient tester tests the sound absorption coefficient of the boards. The friction and wear testing machine is used to test the scratch resistance of the sheet material. The specific steps are as follows: Step a: The staff places two wood-plastic acoustic panel samples to be tested smoothly into the dual-station workpiece tray 44 of the friction testing mechanism 4 through the dedicated inlet of the outer shell 2. The staff operates the sub-controller 3 to start its internal preset scratch test program. The sub-controller 3 starts the first linear movement module 43, the transport robot arm 6, the third motor 95, the third linear movement module 81, the fourth motor 910, the dual-axis movement module 84, the tape pasting module 85, and the second vision sensor 83 according to the preset logic. The first linear movement module 43 drives the dual-station workpiece tray 44 to move to the left until it is directly below the gripping station of the transport robot arm 6. The transport robot arm 6 grabs one of the samples in the dual-station workpiece tray 44, transfers it, and places it in the tray. Within the single-station workpiece tray 82 of the scratch testing mechanism 8, the third motors 95 inside the scratch simulation components 9 on the left and right sides drive the corresponding rotating seats 93 to rotate. The rotating seats 93 then drive the outer shells 94 to move. Under the constraint of the pulley seat 92 and the arc-shaped slide rail 91, the outer shells 94 on the left and right sides rotate in opposite directions, ultimately making the outer shells 94 of the two scratch simulation components 9 arranged in a V-shape symmetrical arrangement. The third linear movement module 81 drives the single-station workpiece tray 82 to move the sample from right to left at a uniform speed. The fourth motors 910 inside the scratch simulation components 9 on the left and right sides drive the screws of the corresponding lead screw assemblies 99 to rotate intermittently clockwise or counterclockwise. The lead screw nut of the lead screw assembly drives the slider 97 to reciprocate back and forth along the slide rail 96. The slider 97 moves synchronously, driving the top scribing blade 98 to reciprocate. As the single-station workpiece tray 82 drives the sample to pass under the two scribing simulation components 9 in sequence, the scribing blades 98 on both sides will cross-cut the sample surface, ultimately creating uniform grid-like scribing on the sample surface. After the scribing is completed, the third linear movement module 81 continues to drive the single-station workpiece tray 82, moving the sample with grid scribing to below the dual-axis movement module 84. The dual-axis movement module 84 is activated, precisely adjusting the up-down and back-and-forth positions of the tape pasting module 85, bringing the tape pasting module 85 close to the sample surface, and controlling the internal tape to automatically paste onto the grid scribing area of ​​the sample. After pasting, the third linear movement module 81 drives the single-station workpiece tray 97 to reciprocate. The sample tray 82 moves the sample to a position below the second vision sensor 83. The second vision sensor 83 is activated, acquiring omnidirectional image data of the grid scratches and tape-attached areas on the sample surface. The acquired image data is sent to the sub-controller 3 in real time. The sub-controller 3 uses a built-in image recognition algorithm to compare and analyze the image data, detecting whether there is peeling or cracking of the coating on the sample surface, thereby completing the quantitative judgment of the sample's scratch resistance and coating adhesion. After the detection is completed, the third linear movement module 81 drives the single-station workpiece tray 82 back to the gripping station of the transport robot arm 6. The transport robot arm 6 is activated again, removing the detected sample from the single-station workpiece tray 82 and placing it back in the corresponding position on the double-station workpiece tray 44.The first linear movement module 43 drives the dual-station workpiece tray 44 to the entrance position of the outer shell 2, whereby the operator can retrieve the sample that has completed the scratch test and await further processing. Step b: Simultaneously with the start of step a, the pre-programmed control module 3 synchronously controls the start of the horizontal movement module 42, the second linear movement module 45, the electric lifting frame 46, the second motor 418, and the first motor 413. The horizontal movement module 42 starts, driving the first linear movement module 43 and the upper double-station workpiece tray 44 to move backward until the other sample in the double-station workpiece tray 44 that has not been transferred moves to below the electric lifting frame 46, ensuring that the polishing disc 415 can be accurately aligned with the sample surface. The second linear movement module 45 starts, driving the electric lifting frame 46 to move downward, gradually approaching the sample in the double-station workpiece tray 44. When the electric lifting frame 46 descends to the preset height, it drives the lower tank shell 47 and the three polishing discs 415 inside to descend synchronously until the three polishing discs 415 are stably attached to the sample surface. After the polishing discs are attached, the second motor 418 starts, driving the drive gear 419 at its bottom to rotate at a constant speed.Because the drive gear 419 meshes with the three transmission gears 417, the rotational power is synchronously transmitted to the three transmission gears 417 through the inter-tooth force. The three transmission gears 417 then drive the three driven gears 416 meshing with them to rotate, ultimately driving the three grinding discs 415 to rotate uniformly around their own axes, performing uniform friction and grinding operations on the sample surface. If it is necessary to adjust the grinding area according to the sample specifications to adapt to different sizes of wood-plastic acoustic panel samples, the first motor 413 starts, driving the worm in the worm gear assembly 414 to rotate. Through the spatial meshing transmission of the worm gear assembly, the rotational motion of the worm is converted into the fixed-axis rotation of the worm wheel, and then... The single-head crank seat 411, connected to the worm gear, rotates around its own axis. As the single-head crank seat 411 rotates, it drives one end of the second connecting rod 412 to move synchronously. The other end of the second connecting rod 412 pushes and pulls the front double-head crank seat 49. Simultaneously with the movement of the front double-head crank seat 49, through the transmission action of the first connecting rod 410, the rear double-head crank seat 49 rotates along a fixed axis with the same rotation angle as the single-head crank seat 411. During this process, the single-head crank seat 411 and the two double-head crank seats 49 respectively drive the bottom grinding disc 415 and the driven gear 416 to move radially along a preset arc trajectory towards the axis of the driving gear 419. As the grinding discs move towards the center, the driven gear 416 moves circumferentially along the outer tooth surface of the corresponding transmission gear 417, ensuring constant engagement with the transmission gear 417. This achieves synchronous adjustment of the positions of the three grinding discs 415, changing the grinding area. After the grinding operation is completed, the second motor 418 stops working, the grinding discs 415 stop rotating, and the electric lifting frame 46 starts, driving the tank housing 47 and the grinding discs 415 upwards, detaching them from the sample surface. The horizontal movement module 42 drives the first linear movement module 43, moving the dual-station workpiece tray 44 and the ground sample below the first vision sensor 5. The first vision sensor 5 then starts. The system acquires omnidirectional image data of the worn surface of the sample and sends the acquired image data to the sub-controller 3 in real time. The sub-controller 3 processes the image data of the worn surface of the sample through the built-in image analysis algorithm, accurately analyzes the wear rate and wear degree of the sample, and generates a scratch resistance durability curve, thereby completing the quantitative judgment of the wear resistance performance of the sample surface. After the test is completed, the horizontal moving module 42 continues to drive the first linear moving module 43 and the dual-station workpiece tray 44 to move to the entrance position of the outer shell 2, so that the staff can take out the sample that has completed the friction and wear test and carry it out together with the sample that has completed the scratch test for subsequent processing or re-inspection. Step 4: Non-conforming Product Removal and Data Traceability: When each detection module detects a non-conforming product, it immediately sends a signal to the central control system. The automatic removal device is activated, removing the non-conforming product from the conveyor belt and sending it to the non-conforming product collection box. The data traceability system synchronously records the production parameters and detection data of each batch of products. If a batch of non-conforming products is detected, the central control system automatically issues an audible and visual alarm and stops the machine. It automatically retrieves the working parameters of the preceding raw material pretreatment system, plasticizing extrusion system, cooling and shaping system, and cutting system to automatically troubleshoot the problem. The qualified finished sheets are sent to the subsequent packaging and warehousing stage.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production line for processing wood-plastic acoustic panels, characterized in that, include: The raw material pretreatment system, plasticizing and extrusion system, cooling and shaping system, cutting system, and detection system are sequentially connected and controlled by a central control system. These systems work together to achieve automated processing and quality control of wood-plastic composite sound-absorbing panels. Specifically, this includes: The detection system is connected to the output end of the cutting system and is used to realize full-dimensional quality inspection and rejection of defective products of wood-plastic acoustic panels. It includes: an appearance inspection module, a size inspection module, a physical performance inspection module, an automatic rejection device, and a data traceability system. The appearance inspection module includes multiple industrial cameras and a color difference detector. The size inspection module includes a laser thickness gauge and a laser displacement sensor. The physical performance inspection module includes a water absorption rate tester, a standing wave tube sound absorption coefficient tester, and a friction and wear testing device. The automatic rejection device is linked with each inspection module and is used to automatically separate defective products. The data traceability system is used to record production and inspection data and supports querying and exporting. The friction and wear testing device includes: Base shell (1); The outer casing (2) is installed on the top outer side of the base casing (1); The sub-controller (3) is mounted on the front top of the outer shell (2) via a bracket; Friction testing mechanism (4) is located on the top right side of the base housing (1); The first visual sensor (5) is installed on the top of the base housing (1) and located outside the friction testing mechanism (4). The first visual sensor (5) and the sub-controller (3) are electrically connected. A handling robotic arm (6) is installed on the top of the base housing (1) and located on the outside left side of the friction testing mechanism (4). The handling robotic arm (6) and the sub-controller (3) are electrically connected. The mounting slot (7) is opened on the top left side of the base housing (1) in a left-right reverse direction; The scratch testing mechanism (8) is located inside the mounting slot (7).

2. The production line for processing wood-plastic acoustic panels according to claim 1, characterized in that, The friction testing mechanism (4) includes: The base frame (41) is fixedly installed on the top right side of the base housing (1) in the front-back direction, and the base frame (41) is L-shaped; A horizontal moving module (42) is fixedly installed on the top of the base frame (41) in the front-back direction, and the horizontal moving module (42) is electrically connected to the sub-controller (3); The first linear moving module (43) is fixedly installed on the top of the moving end of the horizontal moving module (42) in the left-right direction, and the first linear moving module (43) is electrically connected to the sub-controller (3); A dual-station workpiece tray (44) is installed on top of the moving end of the first linear moving module (43); The second linear movement module (45) is installed in the middle of the front top of the base frame (41) in the vertical direction. The second linear movement module (45) and the sub-controller (3) are electrically connected. An electric lifting frame (46) is installed on the front side of the moving end of the second linear moving module (45), and the electric lifting frame (46) is electrically connected to the sub-controller (3).

3. The production line for processing wood-plastic acoustic panels according to claim 2, characterized in that, The friction testing mechanism (4) also includes: The tank shell (47) is fixedly installed at the bottom of the lifting end of the electric lifting frame (46); Mounting bracket (48) is installed in the middle of the top of the inner part of the outer shell (47) of the tank; Two double-headed crank seats (49) are provided, and the two double-headed crank seats (49) are respectively mounted on the front and rear sides of the bottom end of the mounting bracket (48) via a rotating shaft. The first connecting rod (410) is mounted on the front and rear ends of the first connecting rod (410) respectively above the front and rear double-headed crank seats (49) via a rotating shaft; A single-head crank seat (411) is rotatably mounted on the left side of the bottom end of the mounting bracket (48) via a rotating shaft. The single-head crank seat (411) and the two double-head crank seats (49) on the right side are arranged in a triangular orientation. The second connecting rod (412) is mounted on the top of the single-head crank seat (411) and the front double-head crank seat (49) respectively via a rotating shaft.

4. The production line for processing wood-plastic acoustic panels according to claim 3, characterized in that, The friction testing mechanism (4) also includes: The first motor (413) is fixedly installed on the bottom left side of the mounting bracket (48), and the first motor (413) is electrically connected to the sub-controller (3); The worm gear assembly (414) has a worm wheel mounted on the outer side of the top of the shaft of the single-start crank seat (411), and the worm of the worm gear assembly (414) is mounted on the rotating end of the first motor (413).

5. A production line for processing wood-plastic acoustic panels according to claim 4, characterized in that, The friction testing mechanism (4) also includes: The number of grinding discs (415) is three, and the three grinding discs (415) are respectively mounted on the outer side of the bottom end of the two double-headed crank seats (49) and the single-headed crank seat (411) via rotating shafts; Driven gears (416), there are three driven gears (416), and the three driven gears (416) are respectively keyed to the top of the outer side of the shaft of the three grinding discs (415); The transmission gear (417) has three parts. The three transmission gears (417) are respectively mounted on the bottom outer side of the shaft at the connection position between the front and rear double-headed crank seats (49) and the single-headed crank seat (411) and the mounting bracket (48) via bearings. The three transmission gears (417) mesh with the three driven gears (416) on the sides respectively. The second motor (418) is fixedly installed on the inner side of the top of the mounting bracket (48). The rotating end of the second motor (418) extends to the lower surface of the mounting bracket (48). The second motor (418) and the sub-controller (3) are electrically connected. The drive gear (419) is fixedly installed at the bottom of the rotating end of the second motor (418), and the outer side of the drive gear (419) meshes with the inner side of the three transmission gears (417).

6. A production line for processing wood-plastic acoustic panels according to claim 5, characterized in that, The scratch testing mechanism (8) includes: The third linear movement module (81) is fixedly installed at the bottom of the inner cavity of the mounting slot (7) in the left-right direction. The third linear movement module (81) and the sub-controller (3) are electrically connected. A single-station workpiece tray (82) is installed on top of the moving end of the third linear moving module (81); Scratch simulation component (9), there are two scratch simulation components (9), the two scratch simulation components (9) are respectively installed on the top of the base shell (1) and located on the upper right side of the third linear moving module (81); The second vision sensor (83) is mounted on the top of the base housing (1) by a bracket and is located on the outside left front of the mounting slot (7). The second vision sensor (83) and the sub-controller (3) are electrically connected. The dual-axis moving module (84) is mounted on the top of the base housing (1) by a bracket and is located on the left rear side of the mounting slot (7). The dual-axis moving module (84) and the sub-controller (3) are electrically connected. The tape applicator (85) is installed on the right side of the moving end of the dual-axis moving module (84), and the tape applicator (85) is electrically connected to the sub-controller (3).

7. A production line for processing wood-plastic acoustic panels according to claim 6, characterized in that, The scratch simulation component (9) includes: The arc-shaped slide rail (91) is fixedly installed on the top of the base housing (1) in the left-right direction and is located outside the mounting groove (7) on the right rear side; A pulley seat (92) is installed on the top of the inner cavity of the arc-shaped slide rail (91); The rotating seat (93) is installed at the top of the base housing (1) and is located on the outside right front of the mounting groove (7), and is symmetrically arranged with the arc-shaped slide rail (91) in front and behind. The outer casing (94) is installed on the top of the rotating end of the rotating seat (93) in the front-rear direction, and the rear side of the outer casing (94) is fixedly connected to the top front side of the pulley seat (92); The third motor (95) is installed at the front end of the housing (94). The rotating end of the third motor (95) is fixedly connected to the axis of the rotating seat (93). The third motor (95) is electrically connected to the sub-controller (3).

8. A production line for processing wood-plastic acoustic panels according to claim 7, characterized in that, The scratch simulation component (9) also includes: The slide rail (96) is fixedly installed on the top of the outer shell (94) in the front-back direction, and the bottom end of the inner cavity of the slide rail (96) communicates with the top of the inner cavity of the outer shell (94); A slider (97) is installed in the inner cavity of the slide rail (96), and the bottom end of the slider (97) extends into the inner cavity of the outer shell (94); A scribing blade (98) is mounted on the top left side of the slider (97) in the vertical direction; A lead screw assembly (99) is provided, wherein the lead screw of the lead screw assembly (99) is installed in the inner cavity of the housing (94) in the front-back direction, and the lead screw nut of the lead screw assembly (99) is fixedly connected to the bottom end of the slider (97). The fourth motor (910) is installed on the rear side of the outer surface of the housing (94). The rotating end of the fourth motor (910) extends into the inner cavity of the housing (94) and is fixedly connected to the rear end of the lead screw shaft of the lead screw assembly (99). The fourth motor (910) is electrically connected to the sub-controller (3).

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