A method and system for double-sided synchronous atomization glue spraying of a composite board

Abstract

The present application belongs to the field of composite board spraying processing technology, and discloses a composite board double-side synchronous atomization glue spraying method and system, which comprises a rack, a board conveying mechanism, an upper-side atomization glue spraying module, a lower-side atomization glue spraying module, a glue solution supply and metering unit, a synchronous control unit and a negative pressure mist collection and recovery unit; the board conveying mechanism is used for continuously conveying the composite board; the upper-side and lower-side atomization glue spraying modules can be self-adaptively vertically adjusted in distance; the glue solution supply and metering unit is provided as a double-path independent glue supply structure, and independently supplies glue to the upper-side and lower-side atomization glue spraying modules in a stable pressure and a constant quantity; the synchronous control unit is used for realizing linkage and synchronous closed-loop control of the board conveying speed, the upper and lower nozzle spraying actions and the double-path glue supply parameters; and the negative pressure mist collection and recovery unit covers the glue spraying station, is used for collecting the sprayed escaping glue mist and recycling and utilizing the glue mist, and solves the problems of the traditional composite board glue spraying process, such as the need for board overturning, low production efficiency, poor consistency of double-side glue layers, glue waste and workshop pollution.

Description

Technical Field

[0001] This invention relates to the field of composite board spraying technology, and in particular to a method and system for simultaneous double-sided atomized adhesive spraying of composite boards. Background Technology

[0002] Composite panels are mainly formed by bonding a surface panel and a core material together. Before bonding, adhesive needs to be evenly sprayed onto both the upper and lower bonding surfaces to ensure the bonding strength, flatness, and overall service life of the composite. In existing industrial production lines, the adhesive spraying process for composite panels generally adopts a single-sided, multi-stage spraying process. That is, the upper surface of the panel is sprayed with adhesive first, then the panel is flipped over by a special flipping mechanism, and then the lower surface is sprayed with adhesive.

[0003] This traditional processing technology has several unavoidable technical drawbacks: First, the production line must be equipped with a board flipping mechanism, resulting in a large overall footprint and a lengthy production line process. Furthermore, the board flipping process is prone to collisions, deformation, and misalignment, directly affecting the appearance quality and processing precision of the finished board. Second, the board is sprayed on both the upper and lower surfaces in stages, with significant differences in the time interval between sprays and the evaporation time of the adhesive. This leads to uneven adhesive layer thickness and inconsistent bonding performance, making the finished composite board prone to delamination, peeling, and localized bonding failure after long-term use. Third, the multi-stage spraying process is cumbersome, limiting the production cycle and making it unsuitable for high-speed, continuous composite board production lines, resulting in low production efficiency. Fourth, traditional open-type adhesive spraying lacks a dedicated adhesive mist recovery structure, causing a large amount of adhesive mist to disperse in the workshop air. This not only results in significant adhesive waste and increased production costs but also generates VOC emissions that pollute the working environment, failing to meet green and environmentally friendly production requirements.

[0004] Currently, most of the limited number of double-sided spraying equipment on the market adopts a fixed nozzle fixed-point spraying structure, which cannot adapt to the processing of standardized composite boards of different thicknesses and widths. At the same time, it lacks a synchronous linkage control structure for the upper and lower nozzles, and the upper and lower spraying trajectories are prone to misalignment during the spraying process, resulting in extremely poor consistency of double-sided spraying. Furthermore, there is no closed-loop control mechanism that links flow rate, pressure, and conveying speed. When the board conveying speed fluctuates, defects such as missed spraying, glue accumulation, and uneven glue layer thickness are very likely to occur. The equipment has poor versatility and processing accuracy, and cannot meet the needs of large-scale production of high-quality composite boards.

[0005] Therefore, an automated glue spraying method and system is proposed that does not require board flipping, can adapt to different board specifications, performs double-sided synchronous and precise atomization glue spraying, and has glue mist recycling function. Summary of the Invention

[0006] The present invention aims to provide a method and system for simultaneous atomized adhesive spraying on both sides of composite boards to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A composite board double-sided synchronous atomized adhesive spraying system is characterized by comprising a frame, a board conveying mechanism, an upper atomized adhesive spraying module, a lower atomized adhesive spraying module, an adhesive supply and metering unit, a synchronous control unit, and a negative pressure mist collection and recovery unit; the board conveying mechanism is connected to the frame and is used for continuously conveying composite boards; the upper atomized adhesive spraying module and the lower atomized adhesive spraying module are symmetrically arranged on both sides of the conveying path of the board conveying mechanism, and both the upper and lower atomized adhesive spraying modules can adaptively rotate vertically. The system includes adjustable distance adjustment; the adhesive supply metering unit is configured with a dual-path independent adhesive supply structure, which independently stabilizes the pressure and quantitatively supplies adhesive to the upper atomizing adhesive spraying module and the lower atomizing adhesive spraying module respectively; the synchronization control unit is connected to the board conveying mechanism, the upper and lower atomizing adhesive spraying modules and the adhesive supply metering unit respectively, and the synchronization control unit is used to realize the linkage and synchronous closed-loop control of the board conveying speed, the spraying action of the upper and lower nozzles and the dual-path adhesive supply parameters; the negative pressure mist collection and recovery unit covers the adhesive spraying station and is used to collect and recycle the sprayed adhesive mist.

[0008] Preferably, both the upper atomizing adhesive spraying module and the lower atomizing adhesive spraying module are equipped with a vertical lifting drive mechanism. The vertical lifting drive mechanism is electrically connected to the synchronous control unit and is used to automatically adjust the spraying distance between the upper and lower nozzles and the surface of the board according to the detected composite board thickness.

[0009] Preferably, the adhesive supply metering unit includes an adhesive storage tank, two sets of independent precision metering pumps, a pressure stabilizing valve, a pressure sensor, and a flow sensor; the two sets of precision metering pumps are respectively connected to the upper and lower atomizing spray adhesive modules, so that the adhesive supply flow and pressure on the upper and lower surfaces can be independently adjusted.

[0010] Preferably, the sheet material conveying mechanism includes multiple sets of conveying rollers, a servo drive motor, a photoelectric position sensor, and a thickness detection sensor; the photoelectric position sensor is used to detect the position of the sheet material and trigger the spraying start and stop action, and the thickness detection sensor is used to collect the sheet material thickness parameters and transmit them to the synchronization control unit.

[0011] Preferably, the negative pressure mist collection and recovery unit includes a sealed spray hood, a negative pressure fan, a multi-layer condenser filter, and a recovery storage tank; the sealed spray hood only has a channel for the board to enter and exit, and the condenser filter is set in the air duct inside the spray hood to intercept the adhesive mist and condense it into liquid adhesive that flows into the recovery storage tank.

[0012] A method for simultaneous double-sided atomized adhesive spraying on composite boards, characterized by the following steps: S1. Feeding and conveying: The composite board to be processed is continuously conveyed to the glue spraying station via the board conveying mechanism. The photoelectric position sensor and thickness detection sensor collect the board position and thickness signals in real time and transmit them to the synchronous control unit. S2, Module Adaptive Distance Adjustment: The synchronous control unit drives the vertical lifting drive mechanism of the upper and lower atomizing spray adhesive modules according to the thickness data of the board, and adjusts the spray distance between the upper and lower air atomizing nozzles and the upper and lower surfaces of the composite board. S3. Process parameter pre-matching: The synchronous control unit retrieves preset process parameters based on the real-time conveying speed of the board and matches and sets the glue supply flow rate, atomizing air pressure and nozzle lateral movement speed. S4. Double-sided synchronous atomized glue spraying: When the composite board moves to the spraying area, the synchronous control unit synchronously starts the upper and lower atomized glue spraying modules, controls the upper and lower air atomizing nozzles to move synchronously back and forth along the width direction of the composite board, and synchronously turns on the glue supply and atomized air jet to complete the atomized glue spraying operation on the upper and lower surfaces of the composite board simultaneously. S5. Adhesive mist negative pressure recovery: During the adhesive spraying process, the negative pressure mist collection and recovery unit works continuously to capture the suspended adhesive mist that is not attached to the board in the work station. After condensation and filtration, the adhesive liquid is recovered. S6. Parameter closed-loop correction: The system collects data on glue supply flow rate, atomization pressure, and board conveying speed in real time, and dynamically fine-tunes the glue supply of the upper and lower channels and the nozzle moving speed to ensure that the glue coating on the upper and lower surfaces of the composite board is uniform. S7. Material Discharge and Transfer: After the adhesive spraying is completed, the composite board leaves the adhesive spraying station with the conveyor mechanism and is transported to the subsequent pressing and laminating process.

[0013] Preferably, in step S4, the reciprocating motion, moving speed, and start / stop times of the upper and lower air atomizing nozzles are electrically synchronized, and the upper and lower spraying actions are opened and closed synchronously, with the spraying trajectories completely corresponding.

[0014] Preferably, the adhesive liquid recovered in step S5 is filtered to remove impurities and allowed to stand for degassing before being recycled back into the adhesive liquid supply metering unit.

[0015] Preferably, in step S2, the spraying distance between the nozzle and the surface of the board is controlled at 80-180 mm, the atomizing pressure is 0.3-0.7 MPa, and the particle size of the adhesive mist is controlled at 20-80 μm.

[0016] The beneficial effects of this technical solution compared to existing technologies are as follows: (1) By adopting a double-sided synchronous spraying structure, the composite board can complete the synchronous spraying of glue on the upper and lower surfaces in a single pass through the spraying station. The traditional flipping spraying process is not used, which simplifies the production line structure, reduces equipment footprint, and eliminates the problems of bumping and deformation during the flipping process of the board, thus greatly improving the finished product qualification rate and production line operating efficiency.

[0017] (2) This solution achieves electrical synchronization of the upper and lower nozzle displacement, speed, and start-stop sequence through a synchronous control unit. Combined with a dual-path independent pressure-stabilized quantitative glue supply structure, the glue supply parameters of the upper and lower surfaces can be independently adjusted according to the working conditions of the board. With the real-time closed-loop correction mechanism, it can solve the problems of uneven thickness of double-sided adhesive layer and large differences in bonding performance in traditional processes, and ensure stable and reliable bonding quality of composite board.

[0018] (3) This solution can capture all the suspended adhesive mist escaping in the workstation by setting up a closed negative pressure mist collection and recovery structure. The recovered adhesive liquid can be recycled after filtration and degassing treatment, which greatly reduces the loss of adhesive and effectively prevents VOC pollution in the workshop caused by adhesive mist drift, improves the working environment, and meets the industrial environmental protection production standards.

[0019] (4) This solution can adaptively adjust the nozzle spacing, atomizing air pressure, glue supply flow rate and nozzle lateral movement speed according to the thickness of the board and the conveying speed. It can be adapted to various composite boards of different thicknesses and widths, and is compatible with a variety of commonly used adhesives. Process parameters can be stored and recalled. The whole process is automatically closed-loop controlled with little manual intervention, and is suitable for large-scale continuous industrial production. Attached Figure Description

[0020] Figure 1 This is a flowchart of the present invention; Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Example 1 like Figure 1 As shown, the present invention discloses a composite board double-sided synchronous atomized adhesive spraying system, comprising a frame, a board conveying mechanism, an upper atomized adhesive spraying module, a lower atomized adhesive spraying module, an adhesive supply metering unit, a synchronization control unit, and a negative pressure mist collection and recovery unit. The board conveying mechanism is fixedly mounted on the frame and is driven by a servo drive motor to drive multiple sets of conveying rollers to achieve continuous board conveying. The conveying mechanism is equipped with photoelectric position sensors and thickness detection sensors, which can collect board position and thickness data in real time and transmit them to the synchronization control unit.

[0021] The upper and lower atomizing glue spraying modules are symmetrically arranged on both sides of the board conveying path. Both modules are equipped with a vertical lifting drive mechanism, which can adaptively adjust the vertical distance according to the board thickness. The glue supply metering unit is equipped with two independent precision metering pumps, pressure stabilizing valves, pressure sensors and flow sensors, forming a dual-path independent glue supply structure, which independently stabilizes the pressure and provides quantitative glue supply to the upper and lower atomizing glue spraying modules, realizing independent adjustment of the glue supply parameters on both sides.

[0022] The synchronous control unit adopts PLC main control and is electrically connected to each mechanism to realize the linkage synchronous closed-loop control of the board conveying speed, the reciprocating spraying action of the nozzle, and the flow rate and pressure of the dual-path glue supply; the negative pressure mist collection and recovery unit consists of a sealed spraying hood, a negative pressure fan, a multi-layer condenser filter, and a recovery storage tank. The sealed spraying hood only has a reserved passage for the board to enter and exit, and can cover the glue spraying station in all directions to effectively capture and condense the suspended glue mist for recovery.

[0023] The composite board double-sided synchronous atomized adhesive spraying method based on this system includes the following steps: S1. Feeding and conveying: The composite board is continuously fed into the glue spraying station via the board conveying mechanism. The position and thickness signals of the composite board are collected in real time by photoelectric position sensor and thickness detection sensor and transmitted to the synchronous control unit in real time. S2, Module Adaptive Spacing Adjustment: The synchronous control unit drives the vertical lifting drive mechanism corresponding to the upper and lower atomizing spray adhesive modules to move synchronously according to the collected board thickness data, and precisely adjusts the spraying distance between the upper and lower air atomizing nozzles and the upper and lower surfaces of the composite board, so that the nozzles are in the optimal spraying position. S3. Process parameter pre-matching: The synchronous control unit retrieves the corresponding preset process parameters inside the system according to the real-time conveying speed of the composite board, and matches and sets the dual-path adhesive supply flow rate, atomizing air pressure and nozzle lateral movement speed. S4. Double-sided synchronous atomized adhesive spraying: When the photoelectric sensor detects that the composite board has moved into the spraying area, the synchronous control unit synchronously starts the upper and lower atomized adhesive spraying modules, controls the upper and lower air atomizing nozzles to move back and forth synchronously along the width direction of the composite board, and synchronously starts the adhesive supply and atomizing air jet, so as to complete the uniform atomized adhesive spraying operation on the upper and lower surfaces of the composite board simultaneously; the reciprocating movement, movement speed, start and stop time of the upper and lower nozzles are electrically synchronized, and the spraying trajectory is completely corresponding; S5. Negative pressure glue mist recovery: During the entire glue spraying process, the negative pressure fog collection and recovery unit operates continuously to capture suspended glue mist that is not attached to the board in the spraying station. The glue mist is recovered through condensation and filtration to obtain liquid recovered glue. After filtration to remove impurities and standing to remove bubbles, the recovered glue can be sent back to the glue supply metering unit for recycling. S6. Parameter closed-loop correction: The system collects real-time data on dual-path glue supply flow, atomization pressure, and board conveying speed. Based on real-time working conditions, it dynamically adjusts the glue supply of the upper and lower paths and the nozzle moving speed to ensure uniform glue coating on the upper and lower surfaces of the composite board. S7. Material Discharge and Transfer: The composite board that has completed double-sided synchronous atomized glue spraying is smoothly removed from the glue spraying station by the board conveying mechanism and continuously transported to the subsequent pressing and laminating process.

[0024] Example 2 This embodiment is designed for water-based adhesive spraying of thin honeycomb composite panels. By using a synchronous control unit to preset exclusive process parameters, the spraying distance between the nozzle and the panel surface is adjusted to 90mm, and the atomizing air pressure is adjusted to 0.35MPa. Simultaneously, the dual-path adhesive supply flow rate and the nozzle lateral movement speed are reduced to avoid problems such as excessive adhesive layer, seepage, and overflow on thin panels. This ensures a smooth sprayed panel surface and a uniform adhesive layer, meeting the fine spraying requirements of thin panels.

[0025] The specific implementation process is as follows: In operation, the board conveying mechanism first drives the composite board to feed continuously at a uniform speed. The system detects the board thickness and position in real time, automatically adjusts the spraying spacing of the upper and lower glue spraying modules according to the board specifications, and matches the optimal spraying process parameters with the real-time conveying speed. When the board enters the spraying station, the upper and lower atomizing glue spraying modules operate synchronously, simultaneously completing the width-direction reciprocating atomized glue spraying on the upper and lower surfaces of the composite board. During the spraying process, the suspended glue mist is collected in real time by the negative pressure mist collection and recovery unit and recycled. At the same time, the system monitors the glue supply pressure and flow parameters in real time and dynamically closes the loop to ensure that the double-sided adhesive layer is uniform and consistent. Finally, the glued composite board is continuously discharged and enters the next process.

[0026] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A composite board double-sided synchronous atomized adhesive spraying system, characterized in that: The system includes a frame, a sheet material conveying mechanism, an upper atomizing adhesive spraying module, a lower atomizing adhesive spraying module, an adhesive supply metering unit, a synchronization control unit, and a negative pressure mist collection and recovery unit. The sheet material conveying mechanism is connected to the frame and is used for continuous conveying of composite boards. The upper and lower atomizing adhesive spraying modules are symmetrically arranged on both sides of the conveying path of the sheet material conveying mechanism, and both the upper and lower atomizing adhesive spraying modules can adaptively adjust their vertical distance. The adhesive supply metering unit... The metering unit is configured with a dual-path independent glue supply structure, which independently stabilizes the pressure and provides quantitative glue supply to the upper atomizing glue spraying module and the lower atomizing glue spraying module respectively; the synchronization control unit is connected to the board conveying mechanism, the upper and lower atomizing glue spraying modules and the glue supply metering unit respectively, and the synchronization control unit is used to realize the linkage and synchronous closed-loop control of the board conveying speed, the spraying action of the upper and lower nozzles and the dual-path glue supply parameters; the negative pressure mist collection and recovery unit covers the glue spraying station and is used to collect the glue mist that escapes from the spraying and recycle it.

2. The composite board double-sided synchronous atomized adhesive spraying system according to claim 1, characterized in that: Both the upper atomizing adhesive spraying module and the lower atomizing adhesive spraying module are equipped with a vertical lifting drive mechanism. The vertical lifting drive mechanism is electrically connected to the synchronous control unit and is used to automatically adjust the spraying distance between the upper and lower nozzles and the surface of the board according to the detected thickness of the composite board.

3. The composite board double-sided synchronous atomized adhesive spraying system according to claim 1, characterized in that: The adhesive supply metering unit includes an adhesive storage tank, two sets of independent precision metering pumps, a pressure stabilizing valve, a pressure sensor, and a flow sensor. The two sets of precision metering pumps are respectively connected to the upper and lower atomizing spray adhesive modules, so that the adhesive supply flow and pressure on the upper and lower surfaces can be independently adjusted.

4. The composite board double-sided synchronous atomized adhesive spraying system according to claim 1, characterized in that: The sheet material conveying mechanism includes multiple sets of conveying rollers, a servo drive motor, a photoelectric position sensor, and a thickness detection sensor; the photoelectric position sensor is used to detect the position of the sheet material and trigger the spraying start and stop actions, and the thickness detection sensor is used to collect the sheet material thickness parameters and transmit them to the synchronization control unit.

5. The composite board double-sided synchronous atomized adhesive spraying system according to claim 1, characterized in that: The negative pressure mist collection and recovery unit includes a sealed spray hood, a negative pressure fan, a multi-layer condenser filter, and a recovery storage tank. The sealed spray hood only has a channel for the board to enter and exit. The condenser filter is set in the air duct inside the spray hood to intercept the adhesive mist and condense it into liquid adhesive that flows into the recovery storage tank.

6. A method for simultaneous double-sided atomized adhesive spraying on composite panels, characterized in that: Includes the following steps: S1. Feeding and conveying: The composite board to be processed is continuously conveyed to the glue spraying station via the board conveying mechanism. The photoelectric position sensor and thickness detection sensor collect the board position and thickness signals in real time and transmit them to the synchronous control unit. S2, Module Adaptive Distance Adjustment: The synchronous control unit drives the vertical lifting drive mechanism of the upper and lower atomizing spray adhesive modules according to the thickness data of the board, and adjusts the spray distance between the upper and lower air atomizing nozzles and the upper and lower surfaces of the composite board. S3. Process parameter pre-matching: The synchronous control unit retrieves preset process parameters based on the real-time conveying speed of the board and matches and sets the glue supply flow rate, atomizing air pressure and nozzle lateral movement speed. S4. Double-sided synchronous atomized glue spraying: When the composite board moves to the spraying area, the synchronous control unit synchronously starts the upper and lower atomized glue spraying modules, controls the upper and lower air atomizing nozzles to move synchronously back and forth along the width direction of the composite board, and synchronously turns on the glue supply and atomized air jet to complete the atomized glue spraying operation on the upper and lower surfaces of the composite board simultaneously. S5. Adhesive mist negative pressure recovery: During the adhesive spraying process, the negative pressure mist collection and recovery unit works continuously to capture the suspended adhesive mist that is not attached to the board in the work station. After condensation and filtration, the adhesive liquid is recovered. S6. Parameter closed-loop correction: The system collects data on glue supply flow rate, atomization pressure, and board conveying speed in real time, and dynamically fine-tunes the glue supply of the upper and lower channels and the nozzle moving speed to ensure that the glue coating on the upper and lower surfaces of the composite board is uniform. S7. Material Discharge and Transfer: After the adhesive spraying is completed, the composite board leaves the adhesive spraying station with the conveyor mechanism and is transported to the subsequent pressing and laminating process.

7. The method for simultaneous double-sided atomized adhesive spraying of composite panels according to claim 6, characterized in that: In step S4, the reciprocating motion, moving speed, and start / stop times of the upper and lower air atomizing nozzles are electrically synchronized, and the upper and lower spraying actions are opened and closed synchronously, with the spraying trajectories completely corresponding.

8. The method for simultaneous double-sided atomized adhesive spraying of composite panels according to claim 6, characterized in that: The recovered adhesive solution in step S5 is filtered to remove impurities and allowed to stand for degassing before being recycled back into the adhesive solution supply metering unit.

9. The method for simultaneous double-sided atomized adhesive spraying of composite panels according to claim 6, characterized in that: In step S2, the spraying distance between the nozzle and the surface of the board is controlled at 80-180 mm, the atomizing air pressure is 0.3-0.7 MPa, and the atomizing particle size is controlled at 20-80 μm.

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