Plywood circulating thickening production line, gluing pre-curing device and control method of gluing pre-curing device

Abstract

The invention discloses a plywood circulating thickening production line, a gluing and pre-curing device and a control method of the gluing and pre-curing device. The gluing and pre-curing device comprises a gluing and pre-curing station plate conveying device, a gluing and pre-curing station first detection device, a gluing and pre-curing station second detection device, a gluing gantry device, a flexible single-face gluing device and a pre-curing unit. The plywood circulating thickening production line comprises a veneer feeding device, a gluing pre-curing device, an assembling device and a hot pressing device which are connected in sequence. The flexible single-face gluing device in the gluing pre-curing device adopts a flexible material gluing roller and is combined with an electric cylinder driving and optical axis-linear bearing guiding system, automatic height adjustment of the gluing device is achieved, the control method is combined, the device can automatically adapt to plates with different thicknesses, the cyclic thickening process requirement is met, glue waste is reduced, and the production efficiency is improved. The special process of layer-by-layer thickening of the multi-layer plywood is adapted, and the process matching degree is improved; according to the plywood circulating thickening production line, through efficient linkage of the veneer feeding device, the gluing pre-curing device and the assembly device, plywood circulating thickening can be achieved, and then plywood of different thicknesses can be produced according to the preset standard.

Description

Technical Field

[0001] This invention relates to a plywood circulating thickening production line, a glue application and pre-curing device and its control method, belonging to the field of plywood production technology. Background Technology

[0002] Plywood, as a type of engineered wood product, is generally a three- or multi-layered sheet material made by gluing together veneers with adhesives. It is mainly used in furniture manufacturing and other fields.

[0003] In traditional plywood production, each process relies heavily on manual operation, which restricts the efficiency and quality stability of large-scale production. Furthermore, plywood production lines often produce only one type of product per line, making them unsuitable for continuous production of thick plywood. For example, the feeding process currently relies primarily on manual handling, resulting in high labor intensity and low efficiency. Existing mechanical feeding devices generally lack precise limiting structures, leading to easy deviation or tilting during veneer transport. In addition, most equipment is difficult to adapt to veneers of different thicknesses, requiring cumbersome adjustments, and some use rigid clamping or pushing mechanisms, which can easily damage the veneer surface and even cause detachment due to insufficient support under vibration, posing safety hazards. Traditional adhesive application methods use manual brushing or rolling, resulting in poor uniformity and low efficiency, often leading to excessively thick or thin adhesive layers, directly affecting the bonding strength and finished product quality of the plywood. Existing pre-curing technologies often use a single heating device to heat stacked boards, resulting in low heat transfer efficiency and slow adhesive moisture evaporation, extending the production cycle and increasing the risk of board bursting during subsequent hot pressing. The billet assembly process is still mainly manual, which suffers from low efficiency and high labor intensity, making it difficult to meet the needs of large-scale production. Traditional multi-layer hot pressing or continuous flat pressing methods have problems such as low efficiency, large footprint, and high investment costs.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] This invention provides a plywood cyclic thickening production line, an adhesive pre-curing device, and a control method thereof. Through the efficient linkage of a veneer loading device, an adhesive pre-curing device, a blank assembly device, and a hot pressing device, plywood can be cyclically thickened by "loading, adhesive application, pre-curing, blank assembly, and hot pressing curing" or "loading, adhesive application, pre-curing, blank assembly, and hot pressing curing," thereby enabling the production of plywood of different thicknesses according to preset standards.

[0006] The technical solution of the present invention is as follows: According to a first aspect of the present invention, a pre-curing device for adhesive application in a plywood circulating thickening production line is provided, comprising a board conveying device for the pre-curing station, a first detection device for the pre-curing station, a second detection device for the pre-curing station, an adhesive gantry device, a flexible single-sided adhesive application device, and a pre-curing unit; the board conveying device for the pre-curing station is used to convey boards; the first detection device for the pre-curing station, the adhesive gantry device, the second detection device for the pre-curing station, and the pre-curing unit are sequentially installed along the conveying direction on the board conveying device for the pre-curing station; the first detection device for the pre-curing station... The second detection device at the glue application pre-curing station cooperates with the device to drive the end effector component in the glue application gantry to be movably positioned along the height direction. The movable positioning of the end effector component along the height direction ensures that the flexible single-sided glue application device connected to the end effector component has at least a first initial position and a glue application working position. When the flexible single-sided glue application device is in the first initial position, the board conveyed on the board conveying device at the glue application pre-curing station passes directly through. When the flexible single-sided glue application device is in the glue application working position, the flexible single-sided glue application device applies glue to the board conveyed by the board conveying device at the glue application pre-curing station.

[0007] Furthermore, the first detection device at the adhesive pre-curing station includes a first laser sensor for detecting the board material being conveyed on the board conveying device at the adhesive pre-curing station and located on the feed side of the flexible single-sided adhesive applicator; the second detection device at the adhesive pre-curing station includes a second laser sensor for detecting the board material being conveyed on the board conveying device at the adhesive pre-curing station and located on the discharge side of the flexible single-sided adhesive applicator.

[0008] Further, the flexible single-sided adhesive application device includes an adhesive application stepper motor, a middle layer plate, an adhesive application device chain, a feeding shaft, a feeding roller, an adhesive application drive sprocket, a replenishing roller gear, an adhesive application driven sprocket, a coating roller gear, an adhesive storage tank, a replenishing shaft, a coating shaft, a replenishing roller, a coating roller, and an adhesive hopper; a slot is cut into the middle layer plate located above the adhesive pre-curing station board conveying device, and the adhesive hopper is arranged in communication with the slot; the feeding shaft and the adhesive hopper are installed at intervals along the conveying direction on the side of the middle layer plate near the adhesive pre-curing station board conveying device. The system includes a glue storage tank, a glue application shaft, a feeding roller mounted on the feeding shaft, a glue replenishing shaft mounted on the glue storage tank, a glue replenishing roller mounted on the glue replenishing shaft, and a glue application roller mounted on the glue application shaft. One end of the glue application stepper motor is connected to one end of the feeding shaft, and the other end of the feeding shaft is equipped with a glue application drive sprocket. One end of the glue replenishing shaft is equipped with a glue replenishing roller gear, and one end of the glue application shaft is equipped with a glue application driven sprocket and a glue application roller gear. The glue application drive sprocket and the glue application driven sprocket are connected by a glue application device chain, and the glue replenishing roller gear and the glue application driven sprocket mesh with each other.

[0009] According to a second aspect of the present invention, a control method for a glue application pre-curing device in a plywood cyclic thickening production line is provided, comprising: obtaining the total number O of plywood to be produced by the cyclic thickening production line and the number M of veneer layers in a single plywood; wherein M is an odd integer and is 3 or more; and determining the total number of cycles of the plywood cyclic thickening production line based on the number M of veneer layers in a single plywood. The total quantity of plywood to be produced is used as the number of production groups per cycle in the plywood cyclic thickening production line. Each group of boards includes a first-end board, a middle-end board, and a last-end board. The first-end board, middle-end board, and last-end board are conveyed sequentially along the conveying direction. For the p-th cycle, the first-end board and the last-end board each consist of a single veneer. The number of veneers in the middle-end board increases according to the law of 2p–1 as the cycle number p increases. Wherein, 1≤p≤ And p is an integer; when the first detection device of the glue application pre-curing station detects that the first end board, the middle end board, and the last end board of the i-th group of boards have been delivered in sequence, it counts; when the count of the i-th group of boards is less than 3, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device connected to the end execution component is in the glue application working position; when the second detection device of the glue application pre-curing station detects that the board has been delivered, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device is in the first original position; when the count of the i-th group of boards is equal to 3, it resets the count of the first detection device of the glue application pre-curing station to zero, and keeps the flexible single-sided glue application device in the first original position; where 1≤i≤0 and i is an integer.

[0010] Furthermore, a plywood circulating thickening production line includes an adhesive pre-curing device, wherein the adhesive pre-curing device is the adhesive pre-curing device described in any one of the above descriptions.

[0011] Furthermore, the plywood circulation thickening production line also includes a veneer loading device, which serves as the next station above the glue application and pre-curing device.

[0012] Furthermore, the plywood circulating thickening production line also includes a blank assembly device as the next station after the glue application and pre-curing device.

[0013] Furthermore, the plywood circulating thickening production line also includes a hot pressing device as the next station after the billet assembly device.

[0014] The beneficial effects of this invention are as follows: The flexible single-sided gluing device in the gluing pre-curing device of this invention adopts a flexible material gluing roller, combined with an electric cylinder drive + optical axis-linear bearing guiding system, to realize automatic height adjustment of the gluing device. Combined with the control method of this invention, it can automatically adapt to different thickness boards (such as 2mm, 6mm, 10mm, etc.), meet the requirements of cyclic thickening process, reduce glue waste, adapt to the special process of multi-layer plywood thickening layer by layer, and improve process matching degree; This invention is equipped with a dual laser detection device (inlet / outlet), which judges the position of the board by the intensity of reflected laser, accurately controls the descent / ascent of the gluing device, avoids mis-coating and missed coating, realizes intelligent control of coating as soon as the board is in place and stopping as soon as it leaves, and improves glue consistency and equipment response speed. The plywood cyclic thickening production line is equipped with a veneer loading device, an adhesive pre-curing device, and a plywood assembly device. The efficient linkage of these devices enables the plywood to be cyclically thickened through loading, adhesive application, pre-curing, assembly, hot-press curing, loading, adhesive application, pre-curing, assembly, and hot-press curing, thereby producing plywood of different thicknesses according to preset standards. The entire production line has the advantages of reasonable structural design, high degree of automation, high execution efficiency, ease of operation, strong practicality, and small size. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the plywood circulating thickening production line of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the single-layer board feeding device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the single-layer board feeding device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 1 .

[0018] Figure 4 This is a schematic diagram of the single-layer board feeding device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 1 .

[0019] Figure 5 This is an assembly diagram of the motor of the feeding module in the material handling mechanism of the single-board feeding device.

[0020] Figure 6 This is a partial schematic diagram of the single-board loading device in this invention. Figure 1 .

[0021] Figure 7 This is a partial schematic diagram of the single-board loading device in this invention. Figure 2 .

[0022] Figure 8This is a partial schematic diagram of the first detection unit in the single-board loading device.

[0023] Figure 9 This is a schematic diagram of the material storage mechanism in a single-board loading device. Figure 1 .

[0024] Figure 10 This is a schematic diagram of the material storage mechanism in a single-board loading device. Figure 2 .

[0025] Figure 11 This is an exploded view of the pallet receiving frame, material pallet, and pallet fixing seat in the single-board loading device.

[0026] Figure 12 This is a partial schematic diagram of the single-board loading device in this invention. Figure 3 .

[0027] Figure 13 This is a schematic diagram of the adhesive pre-curing device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 1 .

[0028] Figure 14 This is a schematic diagram of the adhesive pre-curing device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 2 .

[0029] Figure 15 This is a schematic diagram of the adhesive pre-curing device on a plywood circulating thickening production line according to an embodiment of the present invention. Figure 3 .

[0030] Figure 16 This is a schematic diagram of the adhesive application gantry device and the flexible single-sided adhesive application device in the adhesive application pre-curing device.

[0031] Figure 17 This is a schematic diagram of the flexible single-sided adhesive applicator in the adhesive pre-curing device.

[0032] Figure 18 This is a schematic diagram of a partial structure of the flexible single-sided adhesive applicator in the adhesive pre-curing device. Figure 1 .

[0033] Figure 19 This is a schematic diagram of a partial structure of the flexible single-sided adhesive applicator in the adhesive pre-curing device. Figure 2 .

[0034] Figure 20 This is a schematic diagram of a partial structure of the flexible single-sided adhesive applicator in the adhesive pre-curing device. Figure 3 .

[0035] Figure 21 This is a schematic diagram of the rectangular cavity structure in the adhesive pre-curing device.

[0036] Figure 22 This is a schematic diagram of the internal structure of the rectangular cavity in the adhesive pre-curing device.

[0037] Figure 23 This is a schematic diagram of the electrical control box in the adhesive pre-curing device.

[0038] Figure 24 This is a schematic diagram of the plywood assembling device on a plywood circulating thickening production line according to an embodiment of the present invention.

[0039] Figure 25 This is a first-view structural schematic diagram of the billet assembly device.

[0040] Figure 26 This is a second-view structural schematic diagram of the billet assembly device.

[0041] Figure 27 This is a third-view structural diagram of the billet assembly device.

[0042] Figure 28 This is a schematic diagram of the support claw module in the billet assembly device.

[0043] Figure 29 This is a partial structural diagram of the claw module in the billet assembly device.

[0044] Figure 30 This is a schematic diagram of the baffle module and guide module in the billet assembly device.

[0045] Figure 31 This is a schematic diagram of the hot pressing device structure on a plywood circulating thickening production line according to an embodiment of the present invention.

[0046] Figure 32 This is a schematic diagram of the frame of the billet assembly device (automatic feeding module in the hot pressing device).

[0047] Figure 33 This is a structural diagram of the billet discharge module in the billet assembly device (automatic feeding module in the hot pressing device).

[0048] Figure 34 This is a schematic diagram of the lifting module structure in the hot pressing device.

[0049] Figure 35 This is a schematic diagram of the automatic ejection module structure in the hot pressing device.

[0050] Figure 36 This is a schematic diagram of the hydraulic module structure in the hot pressing device.

[0051] Figure 37 This is a schematic diagram of the electrical control box in the hot pressing device.

[0052] The components in the diagram are labeled as follows: 1. Loading telescopic cylinder; 2. Loading vacuum suction cup; 3. Loading vacuum suction cup base; 4. Loading cylinder seat; 5. Proximity switch mounting base; 6. Round flange linear bearing; 7. Bearing retaining ring; 8. Proximity switch; 9. Probe; 10. Compression spring; 11. Loading side stop; 12. Loading cable chain; 13. Loading cable chain bracket; 14. Slider; 15. First coupling; 16. Second motor base; 17. Loading module motor; 18. Limit sensor; 19. Single output shaft; 19-1 belt; 20. Pallet receiving frame; 21. Material pallet; 22. Pallet fixing seat; 23. Pallet servo motor; 24. First negative pressure conveyor belt; 25. Loading station conveyor motor; 26. First reducer; 27. Storage side baffle; 28. Storage front baffle; 29. ​​Side baffle photoelectric sensor; 20. Channel photoelectric sensor. Sensor 30, Feeding limit plate 31, 60 profile 32, 60 profile support 33, First corner code 34, First negative pressure fan 35, First foot cup 36, Negative pressure fan interface 37, Pallet lifting guide rail 38, Glue application pre-curing station conveyor motor 39, Glue application pre-curing station motor bracket 40, Aluminum profile 41, Transmission roller 42, Ground corner 43, Conveyor device power sprocket 44, Conveyor device chain 45, Roller cover 46, Glue application pre-curing station first sensor bracket 47, Glue application pre-curing station first laser sensor 48, Glue application pre-curing station second laser bracket 49, Glue application pre-curing station second laser sensor 50, Feeding guide plate 51, Gantry electric cylinder 52, First connecting plate 53, Top plate reinforcing plate 54, Glue application stepper motor 55. Machine, 56. Optical shaft, 57. Bottom guide shaft support, 58. Bottom plate, 59. Third reducer, 60. Middle plate, 61. Linear bearing, 62. Top plate, 63. Plug bolt, 64. Graphite copper sleeve, 65. Connecting plate spring, 66. Top guide shaft support, 67. Glue application device chain, 68. Stepper motor mounting plate, 69. Second coupling, 70. Feeding shaft, 71. Feeding roller, 72. Glue replenishing roller bearing, 73. Feeding roller flat key, 74. Glue application drive sprocket, 75. Glue replenishing roller gear, 76. Glue application driven sprocket, 77. Glue application roller gear, 78. Glue application roller fine adjustment bolt, 79. Glue application roller spring, 80. Glue storage tank, 81. Glue replenishing shaft, 82. Glue application shaft, 83. Glue application roller bearing, 84. Round nut, 85. Baffle plate, 86. Fixing ring, 87. Glue replenishing roller, 88. 89. Glue application roller, 90. Fixing nut, 91. Glue application roller key, 92. Glue replenishing roller key, 93. Glue feeding hopper, 94. Glue storage tank, 95. Metering pump, 96. Glue feeding hose, 97. Fan, 98. Air inlet duct, 99. Pre-curing chamber, 100. Air outlet duct, 101. Rectangular cavity, 102. Heating element, 103. Second electrical control box, 104. Start button, 105. Stop button, 106. Emergency stop button, 107. Power knob, 108. Touch screen, 109. Blank loading guard, 110. Second negative pressure conveyor belt, 111. Blank assembly station conveyor motor, 112. Second reducer, 113. Second negative pressure fan, 114. Hose, 115. Linear drive device, 116. Clamping bracket, 117. First cylinder, 118. Second connecting plate, 119. First glue-coating screw.Second rubber-coated screw 120, extension 121, first profile 122, second angle bracket 123, billet assembly frame foot cup 124, first motor 125, first motor base 126, profile base 127, profile mounting base 128, cable chain bracket 129, cable chain 130, second cylinder 131, stop bracket 132, first alignment base 134, third cylinder 135, first alignment baffle 136, second alignment base 137, fourth cylinder 138, second alignment baffle 139, first bracket 140, second bracket 141, first shaft 142, guide wheel 143, feeding transverse movement cylinder 144, feeding transverse movement cylinder fixing plate 145, feeding push rod 146, cylinder limit sensor 147, pull rope displacement sensor 148, lifting telescopic cylinder 149. Pressure sensor 150, fixing rod 151, lifting push rod 152, base plate 153, push-out lateral movement cylinder 154, push-out lateral movement cylinder fixing plate 155, T-shaped push rod 156, support frame 157, lower oil tank 158, heating element 159, dipstick 160, hot press module motor 161, oil pump 162, solenoid valve 163, hydraulic cylinder 164, protective net 165, hydraulic oil pipe 166, upper heating plate 167, lower heating plate 168, upper fixed platform 169-1, moving platform 169-2, lower fixed platform 169-3, guide column 170, upper oil tank 171, filling valve 172, temperature sensor 173, fourth electrical control box 174, temperature controller 175, HMI fixing plate 176, HMI 177, transplanter 178. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0054] Example 1: As Figures 13-23As shown, according to a first aspect of the present invention, a pre-curing device for applying adhesive to a plywood circulating thickening production line is provided, comprising a board conveying device for a pre-curing station, a first detection device for a pre-curing station, a second detection device for a pre-curing station, a gantry device for applying adhesive, a flexible single-sided adhesive application device, and a pre-curing unit; the board conveying device for the pre-curing station is used to convey boards; the first detection device for the pre-curing station, the gantry device for applying adhesive, the second detection device for the pre-curing station, and the pre-curing unit are sequentially installed along the conveying direction on the board conveying device for the pre-curing station; the first detection device for the pre-curing station, the first detection device for the pre-curing station, the gantry device for applying adhesive, the second detection device for the pre-curing station, and the pre-curing unit; the first detection device for the pre-curing station, the first detection device for the pre-curing station, the first detection device for the pre-curing station, the second detection device for the pre-curing station, and the pre-curing unit are sequentially installed along the conveying direction; the first detection device for the pre-curing station, the first detection device for the pre-curing station, the second detection device for the pre-curing station, and the pre-curing unit are... The second detection device at the glue application pre-curing station is used to drive the end effector in the glue application gantry device to be movably arranged along the height direction; by movably arranging the end effector along the height direction, the flexible single-sided glue application device connected to the end effector has at least a first initial position and a glue application working position; when the flexible single-sided glue application device is in the first initial position, the board conveyed on the board conveying device of the glue application pre-curing station passes directly through; when the flexible single-sided glue application device is in the glue application working position, the flexible single-sided glue application device applies glue to the board conveyed by the board conveying device of the glue application pre-curing station.

[0055] According to a second aspect of the present invention, a control method for a glue application pre-curing device in a plywood cyclic thickening production line is provided, comprising: obtaining the total number O of plywood to be produced by the cyclic thickening production line and the number M of veneer layers in a single plywood; wherein M is an odd integer and is 3 or more; and determining the total number of cycles of the plywood cyclic thickening production line based on the number M of veneer layers in a single plywood. The total quantity of plywood to be produced is used as the number of production groups per cycle in the plywood cyclic thickening production line. Each group of boards includes a first-end board, a middle-end board, and a last-end board. The first-end board, middle-end board, and last-end board are conveyed sequentially along the conveying direction. For the p-th cycle, the first-end board and the last-end board each consist of a single veneer. The number of veneers in the middle-end board increases according to the law of 2p–1 as the cycle number p increases. Wherein, 1≤p≤ And p is an integer; when the first detection device of the glue application pre-curing station detects that the first end board, the middle end board, and the last end board of the i-th group of boards have been delivered in sequence, it counts; when the count of the i-th group of boards is less than 3, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device connected to the end execution component is in the glue application working position; when the second detection device of the glue application pre-curing station detects that the board has been delivered, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device is in the first original position; when the count of the i-th group of boards is equal to 3, it resets the count of the first detection device of the glue application pre-curing station to zero, and keeps the flexible single-sided glue application device in the first original position; where 1≤i≤0 and i is an integer; the board delivered by the second detection device of the glue application pre-curing station is transported to the pre-curing device for pre-curing by the board conveying device of the glue application pre-curing station.

[0056] According to a third aspect of the present invention, a plywood circulating thickening production line is provided, including an adhesive pre-curing device, wherein the adhesive pre-curing device is any one of the adhesive pre-curing devices described above. Further, the plywood circulating thickening production line further includes a veneer loading device for the previous station of the adhesive pre-curing device. Further, the plywood circulating thickening production line further includes a blanking assembly device for the next station of the adhesive pre-curing device. Further, the plywood circulating thickening production line further includes a hot pressing device for the next station of the blanking assembly device.

[0057] Example 2: Figures 1-37 As shown, a plywood circulating thickening production line includes a veneer loading device, an adhesive pre-curing device, a blank assembly device, and a hot pressing device connected in sequence.

[0058] Furthermore, such as Figures 2-12As shown, the single-board loading device includes: multiple storage mechanisms, each with an inlet and an outlet, the cavity between the inlet and outlet being a storage area; the storage area is used to store single boards matching the conveying direction of the transport mechanism along the height direction; and a picking mechanism, which includes a loading telescopic cylinder 1, a loading vacuum suction cup 2, and a loading module motor 17. The loading telescopic cylinder 1 drives the loading vacuum suction cup 2 to move along the height direction; the loading module motor 17 drives the loading telescopic cylinder 1 and the loading vacuum suction cup 2 to move together along a first direction; the loading vacuum suction cup 2 is used to pick up... The storage mechanism stores veneers and releases the veneers it has picked up. Applying the above technology, the movement of the feeding telescopic cylinder 1 and the feeding module motor 17 transports the picked-up veneers to the upper end of the transport mechanism, and the feeding vacuum suction cup 2 releases the picked-up veneers / intermediate plywood, achieving orderly picking of veneers / intermediate plywood (the intermediate plywood is the core of the target plywood; assuming the target plywood has five layers and the core is three layers of already glued veneers); the transport mechanism is used to transport the veneers along the conveying direction to the next station; wherein the first direction, the height direction, and the conveying direction are mutually perpendicular.

[0059] Furthermore, the single-board loading device also includes a frame constructed from 60 profiles 32 and first corner brackets 34. First foot cups 36 are installed at the four corners of the bottom of the frame. The profile frame of the material handling mechanism is fixed to the top of the frame by 60 profile support seats 33.

[0060] Furthermore, such as Figures 2-7 As shown, the material handling mechanism also includes a feeding vacuum suction cup base 3, a feeding cylinder base 4, a slider 14, a first coupling 15, a second motor base 16, a limit sensor 18, a single output shaft 19, and a belt 19-1; the cylinder of the feeding telescopic cylinder 1 is fixed to one end of the feeding cylinder base 4 by bolts and a key, and the free end of the piston rod of the feeding telescopic cylinder 1 is connected to the upper side of the feeding vacuum suction cup base 3 by bolts, and the feeding vacuum suction cup 2 is fixed to the bottom of the feeding vacuum suction cup base 3 by bolts; the other end of the feeding cylinder base 4 is equipped with a slider 14 that cooperates with the belt 19-1; the material handling mechanism... One end of the profile frame of the mechanism is fixed with a second motor base 16. A feeding module motor 17 mounted on the second motor base 16 is connected to a single output shaft 19 via a first coupling 15. The two single output shafts 19 are connected by a belt 19-1. The feeding module motor 17 rotates, driving the belt 19-1 to transmit force to the material handling mechanism, achieving translational movement. The number of rotations of the feeding module motor 17 controls the movement position of the material handling mechanism, determining the center position of each storage area for material handling operations. Two limit sensors 18 are installed on the 60 profile to limit the movement of the material handling mechanism along a first direction. The belt 19-1 is a toothed V-belt.

[0061] Furthermore, such as Figure 8 As shown, the material handling mechanism also includes a first detection unit, which includes a proximity switch mounting base 5, a circular flange linear bearing 6, a bearing retaining ring 7, a proximity switch 8, a probe 9, and a compression spring 10. The feeding vacuum suction cup base 3 is connected to one side of the feeding telescopic cylinder 1 and the proximity switch mounting base 5 is fixed by bolts. The proximity switch mounting base 5 has a probe mounting hole and a proximity switch mounting base mounting hole. The proximity switch 8 passes through the proximity switch mounting base mounting hole and is arranged horizontally on the proximity switch mounting base 5. One end of the probe 9, which is arranged along the height direction, extends out of the proximity switch mounting base 5, and the other end of the probe 9 extends out of the feeding vacuum suction cup base 3. The probe 9, located between the proximity switch mounting base 5 and the feeding vacuum suction cup base 3, is sequentially equipped with a compression spring 10, a circular flange linear bearing 6, and a bearing retaining ring 7 that passes through and is fixed on the feeding vacuum suction cup base 3. When the probe 9 is not in contact with the single board, the end of the probe 9 extending out of the feeding vacuum suction cup base 3 is lower than the bottom surface of the feeding vacuum suction cup 2 in the height direction. In practice, the vertical distance between the end face of the probe 9 extending from the base 3 of the loading vacuum suction cup and the bottom surface of the loading vacuum suction cup 2 is set within 5mm. The horizontal arrangement described above can be either a first direction or a conveying direction; the accompanying drawings show an arrangement along the first direction.

[0062] Furthermore, such as Figure 6 As shown, the feeding vacuum suction cup 2 consists of two sets, arranged in a parallel and a perpendicular manner facing the conveying direction, and the two sets of feeding vacuum suction cups 2 are arranged at intervals.

[0063] The specific principle is as follows: When the feeding telescopic cylinder 1 in the storage area drives the feeding vacuum suction cup 2, the feeding vacuum suction cup base 3 and the first detection unit to descend, the single plate in the storage area presses against the probe 9, causing the probe 9 to move upward. During the upward movement of the probe 9, the spring is compressed by force, and the circular flange linear bearing 6 moves upward accordingly. When the signal of the circular flange linear bearing 6 being in position is confirmed by the proximity switch 8, the feeding telescopic cylinder 1 is triggered to drive the lifting action. In addition, the extension and retraction of the feeding telescopic cylinder 1 ensures that it does not interfere with the conveyor belt and can pick up the material board above the negative pressure conveyor belt. It remains in the retracted state before moving to the storage area. When it moves to the discharge port of the storage area, the feeding module motor 17 stops, the feeding telescopic cylinder 1 extends, and the feeding vacuum suction cup 2 is lowered and pressed to the surface of the board. At this time, the feeding vacuum suction cup 2 works to pick up the board. After a certain period of time, the feeding telescopic cylinder 1 retracts. After the material picking mechanism completes the material picking operation, it moves to the top of the first negative pressure conveyor belt 24 to release the board material. The feeding baffle 11 on the first negative pressure conveyor belt 24 adjusts the posture of the material board as it enters the conveyor belt to ensure that the board material enters the circulation posture to meet the requirements of subsequent processes. The negative pressure provided by the first negative pressure fan 35 is sufficient to adsorb the material board after the posture adjustment onto the first negative pressure conveyor belt 24 and convey it to the next process.

[0064] As can be seen from the above technical solution, the feeding vacuum suction cup 2 adopts an integrated vacuum sponge suction cup, with a total of two sets. They are arranged in a parallel and a vertical configuration facing the horizontal conveying direction. The parallel arrangement ensures that the vacuum sponge suction cup 2 can provide better adsorption force along the longitudinal grain when picking up longitudinally textured veneers. At this time, the vertically arranged integrated vacuum sponge suction cup plays an auxiliary adsorption role. The vertical arrangement ensures that the feeding vacuum suction cup 2 can provide better adsorption force along the transverse grain when picking up transversely textured veneers. At this time, the horizontally arranged integrated vacuum sponge suction cup plays an auxiliary adsorption role. The parallel and vertical arrangement prevents the veneer from falling off due to unstable adsorption or the veneer from being deformed after successful adsorption. The deformed veneer includes, but is not limited to: the small adsorption area of ​​the veneer surface causing one of the integrated vacuum suction cups to not be effectively adsorbed, and the edge falling off due to the small adsorption area of ​​the veneer surface causing the veneer to be blocked and damaged by the feeding guard 11 during transportation.

[0065] Furthermore, such as Figure 5As shown, the material handling mechanism also includes a feeding cable chain 12 and a feeding cable chain bracket 13. The feeding cable chain bracket 13 is fixed to the 60 profile 32 by bolts. The feeding cable chain 12 is placed on the feeding cable chain bracket 13, with one end of the feeding cable chain 12 fixed to the feeding cable chain bracket 13 and the other end of the feeding cable chain 12 fixed to the end of the feeding cylinder seat 4 near the slider 14. Furthermore, the feeding cable chain 12 is made of engineering PA66 material and has a hollow internal design to serve as a cable chain for protecting electrical wires and cables. The hollow portion allows the electrical and pneumatic connection lines of the material handling mechanism to pass through, preventing the lines from becoming entangled and obstructing the movement of the material handling mechanism during operation.

[0066] Furthermore, such as Figures 2-4 , Figures 9-12 As shown, the storage mechanism includes a pallet receiving frame 20, a material pallet 21, a pallet fixing seat 22, a pallet servo motor 23, a storage side baffle 27, a storage front baffle 28, and a pallet lifting guide rail 38. Two storage side baffles 27 are arranged opposite each other in the first direction. Two storage front baffles 28 are provided at the end of the two storage side baffles 27 near the forward end of the conveying direction. The pallet lifting guide rail 38 is installed between the two storage front baffles 28. The storage side baffles 27, storage front baffles 28, and pallet lifting guide rail 38 together form a storage area with an inlet and an outlet. A slidingly fitted pallet fixing seat 22 is installed on the pallet lifting guide rail 38 and is powered by the pallet servo motor 23. The pallet receiving frame 20 is fixed on the pallet fixing seat 22. The material pallet 21, which is used to store single boards along the height direction, is placed on the pallet receiving frame 20. Furthermore, the pallet servo motor 23, pallet lifting guide rail 38, and pallet fixing base 22 are integrated to form a linear module, which respectively correspond to the module's drive unit, transmission unit, and guide unit.

[0067] Furthermore, such as Figure 10 As shown, the storage side baffle 27 is provided with a bevel near the inlet and outlet, and the bevel makes the inlet / outlet smaller towards the storage area.

[0068] Furthermore, such as Figure 11 As shown, the material pallet 21 includes a support portion and two limiting portions installed on one side of the support portion. The two limiting portions are arranged at intervals to cooperate with the pallet receiving frame 20 for limiting.

[0069] In practical use, the pallet servo motor 23 installed on the upper end of the pallet lifting guide rail 38 is used to drive the pallet fixing seat 22, which is slidably engaged with the pallet lifting guide rail 38, to move along the height direction, thereby driving the pallet receiving frame 20 and the material pallet 21 placed on the pallet receiving frame 20 to follow the movement.

[0070] As can be seen from the above technical solution, the storage side baffle 27 provides lateral centering for the single-board material stack facing the horizontal transportation direction, and the storage front baffle 28 provides front-end blocking for the single-board material stack facing the transportation direction. The storage front baffle 28 and the storage side baffle 27 ensure that the single-board material stack is neatly stacked in the storage area. The inlet and outlet of the storage side baffle 27 are provided with bevels. The bevel of the inlet prevents the single-board material stack from rigidly colliding with the storage side baffle 27 due to positioning errors during material replenishment. The micro-adjustment design of the bevel of the inlet ensures that the single-board material stack enters the storage area in a relatively flexible contact manner, further reducing the posture error of the single-board material stack. The bevel of the outlet ensures that the material picking mechanism can pick up single boards in a relatively flexible contact manner when the centering is inaccurate. The bevel allows the feeding vacuum suction cup 2 to enter the storage area to pick up single boards in a relatively flexible contact manner, preventing the feeding vacuum suction cup 2 on the material picking mechanism from rigidly colliding with the storage side baffle 27 when it descends into the storage area to pick up single boards.

[0071] Furthermore, such as Figures 9-10 , Figure 12 As shown, the material storage mechanism also includes a second detection unit, which includes a side baffle photoelectric sensor 29, a slotted photoelectric sensor 30, and a feeding limit plate 31. The side baffle photoelectric sensor 29 is installed on the material storage side baffle 27 near the discharge port. The feeding limit plate 31 is installed on the side of the pallet fixing seat 22 near the pallet lifting guide rail 38. The upper and lower limits of the outer frame of the pallet lifting guide rail 38 are equipped with slotted photoelectric sensors 30.

[0072] As can be seen from the above technical solution, the side baffle photoelectric sensor 29 above the storage area is responsible for detecting the height of the single board material stack. When a single board is removed, the side baffle photoelectric sensor 29 detects a no-material signal and controls the tray servo motor to drive the material tray 21 to rise. When the side baffle photoelectric sensor 29 detects a material signal, the tray servo motor 23 stops working and waits for the next material removal. Each storage area is equipped with a slotted photoelectric sensor 30 at the upper and lower limits. When the feeding limit plate 31 triggers the upper limit slotted photoelectric sensor 30 and simultaneously receives an upward signal from the side baffle photoelectric sensor 29, a single-board material shortage signal is sent, the upward signal sent by the side baffle photoelectric sensor 29 is canceled, and the pallet servo motor 23 is triggered to control the material pallet 21 to move downward along the pallet lifting guide rail 38. The material supply in this storage area stops. At this time, the pallet servo motor 23 drives the pallet 21 to descend, and the lower limit slotted photoelectric sensor 30 is triggered and reset to indicate that it is waiting for material replenishment. After a certain period of time, the material replenishment is completed, and the pallet servo motor 23 drives the material pallet 21 to move upward a certain distance away from the lower limit. The side baffle photoelectric sensor 29 is triggered to send a material presence signal, and the material supply in this storage area resumes.

[0073] Furthermore, such as Figures 2-4As shown, the transport mechanism includes a loading guard 11, a first negative pressure conveyor belt 24, a loading station conveyor motor 25, a first reducer 26, a first negative pressure fan 35, and a negative pressure fan interface 37. The first negative pressure fan 35 is connected to the negative pressure fan interface on one side of the first negative pressure conveyor belt 24 via a hose. The loading station conveyor motor 25 drives the first negative pressure conveyor belt 24 to move via the first reducer 26. Loading guards 11 are installed on both sides of the upper part of the first negative pressure conveyor belt 24 away from the conveying direction.

[0074] For example, four material handling mechanisms are provided. When four material handling mechanisms are used, according to the above technical solution of the present invention, an optional working process is provided as follows:

[0075] After powering on, the feeding equipment enters the initial power-on state. Internally, it has four storage areas consisting of a front storage baffle 28 and side storage baffles 27, which center the individual boards to ensure accurate positioning of the feeding vacuum suction cup 2. Each storage area is equipped with slotted photoelectric sensors 30 at the top and bottom to ensure sufficient material for each board, allowing for timely replenishment. The upper feeding vacuum suction cup 2 can move horizontally and vertically without interfering with the conveyor belt and can correctly pick up the material boards above the first negative pressure conveyor belt 24. The side baffle photoelectric sensors 29 above each storage area are used to detect the top of the material. If no material is detected, a command is sent to the tray servo motor 23 to control the material tray 21 to rise to the detection position of the side baffle photoelectric sensor 29. This works in conjunction with the slotted photoelectric sensors 30 installed above and below the storage area to achieve automatic tracking and replenishment. The conveyor belt feeding baffle 11 adjusts the posture of the material board as it enters the conveyor belt. The negative pressure provided by the first negative pressure fan 35 is sufficient to adsorb the material board onto the first negative pressure conveyor belt 24, ensuring that the material posture remains unchanged and proceeds to the glue application and pre-curing process as required. The speeds of the feeding station conveyor motor 25 and the feeding vacuum suction cup 2 are adjustable.

[0076] As can be seen from the above technical solution, the material picking mechanism can be driven to the corresponding discharge port to pick up the material, the material storage mechanism can ensure sufficient single board material, and the built-in adaptive height adjustment ensures neat process, so that the material picking mechanism can pick up the material smoothly, and then the single board can be transported to the next station through the transportation mechanism.

[0077] Furthermore, such as Figures 13-23As shown, the adhesive pre-curing device includes an adhesive pre-curing station board conveying device, an adhesive pre-curing station first detection device, an adhesive pre-curing station second detection device, an adhesive gantry device, a flexible single-sided adhesive applicator, and a pre-curing unit; the adhesive pre-curing station board conveying device is used to convey boards; the adhesive pre-curing station board conveying device is sequentially equipped with the adhesive pre-curing station first detection device, the adhesive gantry device, the adhesive pre-curing station second detection device, and the pre-curing unit along the conveying direction; the adhesive pre-curing station first detection device and the adhesive pre-curing station second detection device are equipped with... The flexible single-sided adhesive applicator is configured to move along the height direction to drive the end effector component in the adhesive applicator gantry. The end effector component is moved along the height direction, so that the flexible single-sided adhesive applicator connected to the end effector component has at least a first initial position and an adhesive application working position. When the flexible single-sided adhesive applicator is in the first initial position, the board conveyed on the adhesive pre-curing station board conveyor passes directly through it. When the flexible single-sided adhesive applicator is in the adhesive application working position, adhesive is applied to the board conveyed by the adhesive pre-curing station board conveyor via the flexible single-sided adhesive applicator.

[0078] Furthermore, such as Figures 13-14 As shown, the pre-curing station board conveying device includes a pre-curing station conveying motor 39, a pre-curing station motor bracket 40, an aluminum profile 41, a transmission roller 42, a base 43, a conveying device drive sprocket 44, a conveying device drive chain 45, and a roller cover 46. The pre-curing station conveying motor 39 is mounted on the pre-curing station motor bracket 40 to provide power. The pre-curing station motor bracket 40 is fixed to a frame composed of the aluminum profile 41 and the base 43. The conveying device drive sprocket... 44 is installed on the shaft of the conveyor motor 39 at the adhesive pre-curing station. Multiple drive rollers 42 are mounted on the frame via bearings. The power chain 45 of the conveyor device is used to connect the first sprocket on the first drive roller 42 and the power sprocket 44 of the conveyor device. Any adjacent drive rollers 42 transmit power through the chain and sprocket to realize the transmission of power from the conveyor motor 39 at the adhesive pre-curing station to all drive rollers 42. The roller cover 46 is installed on the aluminum profile 41 to encapsulate the chain and sprocket installed on the drive rollers 42.

[0079] Furthermore, such as Figures 13-14As shown, the first detection device for the adhesive pre-curing station includes a first sensor bracket 47 and a first laser sensor 48 for the adhesive pre-curing station. The first sensor bracket 47 is fixed on the frame at the front end of the adhesive pre-curing station board conveying device and is located on the opposite side of the roller cover 46. The first laser sensor 48 is mounted on the first sensor bracket 47. The second detection device for the adhesive pre-curing station includes a second sensor bracket 49 and a second laser sensor 50 for the adhesive pre-curing station. The second sensor bracket 49 is fixed on the frame at the rear end of the adhesive pre-curing station board conveying device and is located on the opposite side of the roller cover 46. The second laser sensor 50 is mounted on the second sensor bracket 49.

[0080] Furthermore, such as Figures 15-16 As shown, the adhesive application gantry device includes a gantry electric cylinder 52, a top plate reinforcing plate 54, a light shaft 56, a bottom guide shaft support 57, a bottom plate 58, a top plate 62, and a top guide shaft support 66. The entire adhesive application gantry device is installed on the adhesive pre-curing station board conveying device through the mounting holes of the bottom plate 58. The top plate 62 has the gantry electric cylinder 52 installed in the middle according to the designed mounting holes. The top plate reinforcing plates 54 are installed on both sides above the gantry electric cylinder 52. The top guide shaft support 66 is installed at the bottom of both ends of the top plate 62. A guide shaft support 66 is provided; bottom guide shaft supports 57 are installed on the upper part of both ends of the bottom plate 58; the upper end of the optical shaft 56 is connected to the top guide shaft support 66, and the lower end of the optical shaft 56 is connected to the bottom guide shaft support 57; the optical shaft 56 passes through the linear bearing 61 of the flexible single-sided adhesive applicator and guides the up and down movement of the flexible single-sided adhesive applicator along the height direction; the output shaft of the gantry electric cylinder 52 serves as the end execution component of the adhesive applicator gantry device, and the first connecting plate 53 of the flexible single-sided adhesive applicator is connected to the output shaft of the gantry electric cylinder 52.

[0081] Furthermore, such as Figures 15-20As shown, the flexible single-sided adhesive application device includes a feeding guide plate 51, a first connecting plate 53, an adhesive application stepper motor 55, a third reducer 59, a middle layer plate 60, a linear bearing 61, a plug bolt 63, a graphite copper sleeve 64, a connecting plate spring 65, an adhesive application device chain 67, a stepper motor mounting plate 68, a second coupling 69, a feeding shaft 70, a feeding roller 71, a replenishing roller bearing 72, a feeding roller bearing 73, a feeding roller flat key 74, an adhesive application drive sprocket 75, a replenishing roller gear 76, an adhesive application driven sprocket 77, a coating roller gear 78, a coating roller fine-tuning bolt 79, a coating roller spring 80, an adhesive storage tank 81, a replenishing shaft 82, a coating shaft 83, a coating roller bearing 84, a round nut 85, a glue-blocking plate 86, a fixing ring 87, a replenishing roller 88, and a coating roller... Components include: glue roller 89, fixing nut 90, glue application roller key 91, glue replenishment roller key 92, glue feeding hopper 93, glue storage tank 94, metering pump 95, and glue delivery hose 96. A graphite copper sleeve 64 is placed above the first connecting plate 53. A bolt 63 passes through the graphite copper sleeve 64, the first connecting plate 53, and the connecting plate spring 65 to connect with the middle layer plate 60, thus applying pressure to the board during glue application. The first connecting plate 53 is also connected to the output shaft of the gantry electric cylinder 52 in the glue application gantry device. Linear bearings 61 are installed at both ends of the middle layer plate 60. A slot is opened in the middle of the middle layer plate 60. The glue feeding hopper 93 is installed on the side of the middle layer plate 60 near the glue application device chain 67 and communicates with the slot. The feeding roller 71 is located near the inlet side and is connected to the middle layer plate. A fixed feeding guide plate 51 is provided; a stepper motor mounting plate 68, a feeding roller bearing 73, and a glue storage tank 81 are installed below the middle layer plate 60 according to the designed mounting holes and fixed by bolts and fixing nuts 90; the glue application roller bearing 84 is installed below the middle layer plate 60 by glue application roller fine adjustment bolts 79 and glue application roller springs 80 to achieve fine adjustment of the glue application amount; the glue application roller 89 is axially fixed on the glue application shaft 83 on both sides by round nuts 85, the glue application roller bearings 84 are installed at both ends of the glue application shaft 83, and the glue application roller gear 78 and the glue application driven sprocket 77 are fixed in sequence on one side of the glue application shaft 83 by glue application roller flat key 91; glue replenishment roller bearings 72 are installed at both ends of the glue storage tank 81, and glue baffles 86 are placed at both ends of the glue replenishment roller 88 and installed by fixing rings 87. The glue shaft 82 is axially fixed, and both ends of the glue shaft 82 are fixed to the glue roller bearing 72. A glue roller gear 76 is also fixed to one side of the glue shaft 82 via a glue roller key 92 and meshes with the glue application roller gear 78. The feeding roller 71 is integrally formed with the feeding shaft 70. One end of the feeding shaft 70 passes through the feeding roller bearing 73 and is fixed to the glue application drive sprocket 75 via the feeding roller key 74. The other end of the feeding shaft 70 is connected to the output shaft of the third reducer 59 via a second coupling 69. One end of the third reducer 59 is connected to the stepper motor mounting plate 68 via a mounting hole, and the other end of the third reducer 59 is connected to the glue application stepper motor 55. The glue application device chain 67 meshes with the glue application drive sprocket 75 and the glue application driven sprocket 77 respectively.The metering pump 95 is mounted on the sheet metal conveying device through a mounting hole. Its inlet is connected to a glue storage tank 94 placed on the ground via a flexible hose. Its outlet is connected to one end of a glue delivery hose 96. The other end of the glue delivery hose 96 is fixed to a mounting hole in a glue delivery hopper 93 by a wire, and the other end of the hose 96 communicates with the glue delivery hopper 93. The aforementioned bearing is a mounted bearing.

[0082] Furthermore, such as Figures 21-23 As shown, the pre-curing unit includes a fan 97, an air inlet duct 98, a pre-curing chamber 99, an air outlet duct 100, a rectangular cavity 101, and heating elements 102. The entire pre-curing unit is mounted on the aluminum profile 41 of the adhesive pre-curing station material conveying device through the mounting holes of the pre-curing chamber 99. The fan 97 is mounted on the pre-curing chamber 99, and its outlet is connected to one end of the air inlet duct 98. The air inlet duct 98 extends into the rectangular cavity 101 located inside the pre-curing chamber 99 through a round hole at the top of the pre-curing chamber 99. The heating elements 102 exhibit a differentiated distribution pattern from dense to sparse along the conveying direction and are fixed to the bottom of the rectangular cavity 101 through mounting holes. The rectangular cavity 101 is mounted on the adhesive pre-curing station material conveying device by a bracket composed of aluminum profiles 41. The air outlet duct 100 is installed below the pre-curing chamber 99. The heating elements 102 are carbon fiber quartz heating elements.

[0083] The optional working process of the adhesive pre-curing device is described below: In the initial state, the flexible single-sided adhesive applicator is in the first original position, i.e. Figure 14 , Figure 15As shown in the diagram. First, release the emergency stop button 106 on the second electrical control box 103 (the stop button is used for normal shutdown), press the power button 107 to power on, and then press the start button 104 to start the device. The PLC will send a start signal to the conveyor motor 39 of the adhesive pre-curing station, causing the conveyor motor 39 of the adhesive pre-curing station and the power sprocket 44 of the conveyor device to rotate forward. The rotation of the power sprocket 44 of the conveyor device drives the transmission roller 42 to rotate through the power sprocket 45 of the conveyor device. The PLC sends a start signal to the glue application stepper motor 55, causing it to rotate forward. Its power is transmitted via the third reducer 59 and the second coupling 69 to the feeding shaft 70, driving the feeding roller 71 and the glue application drive sprocket 75 to rotate forward. The rotation of the glue application drive sprocket 75, through the glue application device chain 67, drives the glue application driven sprocket 77 and the glue application shaft 83 to rotate. The rotation of the glue application shaft 83, in turn, causes the glue application roller 89 and the glue application roller gear 78 to rotate. The glue application roller gear 78 transmits power to the touch-up roller gear 76, driving the touch-up roller 82 and the touch-up roller 88 to rotate. At this time, the touch-up roller 88 carries out the adhesive from the glue storage tank 81 and evenly applies it to the glue application roller 89, ready for application. When the first laser sensor 48 at the adhesive pre-curing station detects the board material located on the transmission roller 42 (when the detection device receives a reflected laser beam reaching the set value), until the first laser sensor 48 at the adhesive pre-curing station detects the board material leaving the detection position, the PLC sends a signal to the gantry cylinder 52, causing the gantry cylinder 52 to descend to the set position (adhesive application position). The feeding roller 71 rolls the board material into the flexible single-sided adhesive application device, and the adhesive coating roller 89, in cooperation with the transmission roller 42, evenly applies adhesive to the surface of the board material. When the second laser sensor 50 at the adhesive pre-curing station detects the board material located on the transmission roller 42 leaving the detection position (i.e., the second laser sensor at the adhesive pre-curing station first receives a reflected laser beam reaching the set value, and then stops receiving a reflected laser beam, which is considered as the board material leaving), the PLC sends a signal to the gantry cylinder 52, causing the gantry cylinder 52 to rise to the first initial position, completing the adhesive application action on the board material. The adhesive storage tank is equipped with a liquid level detection device. When the adhesive in the storage tank 81 is insufficient, the motor of the metering pump 95 operates to pump the adhesive in the storage tank 94 out through the adhesive delivery hose 96. The adhesive is then allowed to flow into the storage tank 81 by the adhesive delivery hopper 93. After delivering the set amount of adhesive, the motor of the metering pump 95 stops working. The board material that has left the adhesive application and pre-curing station after being detected by the second laser detection device is sent to the pre-curing unit for pre-curing (the pre-curing unit is in working condition. The fan 97 in this device injects air into the rectangular cavity 101 through the air inlet pipe 98. The injected air flows through the electric heating tube 102 to generate hot air, realizing rapid heating of the board material and accelerating the evaporation of moisture in the adhesive adhering to the board surface). After pre-curing, it is transported to the assembly station.

[0084] In the production of multi-layer plywood, the first, middle, and last plywoods are grouped together and pass through the gluing equipment. The equipment does not apply glue to the last plywood. Each time the first, middle, and last plywoods in a group pass through the first laser sensor 48 at the glue pre-curing station, the first laser sensor 48 counts the plywood (starting from 1). When a plywood with a count less than 3 is detected, the gantry cylinder 52 descends to the set position until the second laser sensor 50 at the glue pre-curing station detects that the plywood on the transmission roller 42 has left the detection position, causing the gantry cylinder 52 to rise to the initial position. When the count is 3, the gantry cylinder 52 stops working and remains in the original position. Then, the first laser sensor 48 at the glue pre-curing station resets its count to zero to wait for the next group.

[0085] A control method for a glue application and pre-curing device in a plywood cyclic thickening production line includes: obtaining the total number O of plywood to be produced by the cyclic thickening production line and the number of veneer layers M of a single plywood; wherein M is an odd integer and is 3 or more; and determining the total number of cycles of the plywood cyclic thickening production line based on the number of veneer layers M of a single plywood. The total quantity of plywood to be produced is used as the number of production groups per cycle in the plywood cyclic thickening production line. Each group of boards includes a first-end board, a middle-end board, and a last-end board. The first-end board, middle-end board, and last-end board are conveyed sequentially along the conveying direction. For the p-th cycle, the first-end board and the last-end board each consist of a single veneer. The number of veneers in the middle-end board increases according to the law of 2p–1 as the cycle number p increases. Wherein, 1≤p≤ And p is an integer; when the first detection device of the glue application pre-curing station detects that the first end board, the middle end board, and the last end board of the i-th group of boards have been delivered in sequence, it counts; when the count of the i-th group of boards is less than 3, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device connected to the end execution component is in the glue application working position; when the second detection device of the glue application pre-curing station detects that the board has been delivered, it drives the end execution component in the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device is in the first original position; when the count of the i-th group of boards is equal to 3, it resets the count of the first detection device of the glue application pre-curing station to zero, and keeps the flexible single-sided glue application device in the first original position; where 1≤i≤0 and i is an integer; the board delivered by the second detection device of the glue application pre-curing station is transported to the pre-curing unit for pre-curing by the board conveying device of the glue application pre-curing station. In the above, for the p-th cycle, the first and last end panels are both single veneers. The number of single veneers in the middle panel increases with the cycle number p according to the rule 2p–1, as explained below: If p=1, then the first, middle, and last end panels are all single veneers; otherwise, if p is greater than 1, then the first and last end panels are both single veneers, and the middle panel is the intermediate plywood formed in the p-1-th cycle. That is, the first and last end panels are single veneers (2mm thick), and the middle panel gradually increases in thickness in an arithmetic progression with the increase of the cycle number (thickness changes to 2mm, 6mm, 10mm, etc.).

[0086] For example, taking a plywood layer count of 5 and the production of 10 plywood sheets as an example, the total number of cycles is... =2. For the first cycle, the first, middle, and last boards in each group of boards are one piece. In the current cycle, 10 intermediate plywoods are produced based on 10 groups of boards (i.e., the intermediate plywood obtained in the first cycle is three-layered). For the second cycle, the first and last boards are one piece each, and the number of veneers in the middle boards is 2*2-1=3, i.e., the three-layered intermediate plywood obtained in the first cycle.

[0087] Single-factor experiments showed that a glue application deviation of ±20g / m² can significantly affect shear strength. The dual-laser detection of this invention can reduce the glue application triggering error, improving process stability and yield. The pre-curing unit of this invention adopts a rectangular cavity + gradient heating tube layout (from dense to sparse), combined with forced convection by a fan, to achieve rapid and uniform pre-curing. This can shorten the pre-curing time, avoid glue layer failure due to local high temperature, reduce subsequent hot pressing energy consumption, and reduce the board explosion rate. Response surface optimization results show that 180g / m² is the optimal glue consumption value, while traditional production lines generally have a high value of 280g / m², indicating serious over-application. This invention reduces glue consumption by more than 35% without affecting structural strength through selective glue application, directly reducing costs. The Box-Behnken model determined that an average board surface temperature of 86.8°C and a pre-curing time of 39.5s are the optimal pre-curing parameters, which can significantly improve shear strength (up to 1.314 MPa) and reduce immersion peel length (2.5 mm). By using gradient heating and convection, the temperature uniformity is controlled within ±5°C, ensuring that the adhesive layer enters the hot pressing process in a bubble-free and over-cured state, reducing the board bursting rate by more than 60%.

[0088] Furthermore, such as Figures 24-30 , Figure 33 As shown, the preform assembly device includes a preform assembly conveying module for conveying the sheet material along the conveying direction (i.e., for continuing to convey the sheet material from the adhesive pre-curing device along the conveying direction); a claw module, installed above the preform assembly conveying module, for clamping the sheet material conveyed by the preform assembly conveying module to the discharge side, and for conveying the clamped sheet material along the conveying direction to the preform assembly discharge module for release; and a preform assembly discharge module, installed below the second negative pressure conveyor belt 110 in the preform assembly conveying module. The preform assembly discharge module includes a feeding push rod 146, which is movably arranged along the conveying direction, such that the feeding push rod 146 has at least a second initial position. First working position; when the feeding push rod 146 is in the second initial position, the feeding push rod 146 is used to place the board released by the claw module and assemble the blank; when the feeding push rod 146 moves from the second initial position to the first working position, it is used to transport the assembled plywood to the next working position; baffle module, the baffle module is movably arranged along the height direction; alignment module, the alignment module includes a first alignment unit and a second alignment unit; the first alignment unit and the second alignment unit are arranged at intervals on both sides of the blank assembly discharge module in the second initial position along the first direction; by the first alignment unit and the second alignment unit moving closer or further away along the first direction, the board on the blank assembly discharge module is aligned.

[0089] Furthermore, such as Figure 24As shown, the billet conveying module includes billet loading guards 109, a second negative pressure conveyor belt 110, a billet assembly station conveyor motor 111, a second reducer 112, a second negative pressure fan 113, and a hose 114. The second negative pressure fan 113 is connected to a negative pressure fan interface on one side of the second negative pressure conveyor belt 110 via the hose 114. The billet assembly station conveyor motor 111 drives the second negative pressure conveyor belt 110 to move via the second reducer 112. Billet loading guards 109 are installed on both sides of the upper part of the second negative pressure conveyor belt 110 away from the conveying direction. The second negative pressure conveyor belt 110 is a perforated conveyor belt. The second negative pressure fan 113 is connected to the negative pressure fan interface, forming a negative pressure cavity below the conveyor belt. The perforated conveyor belt has a perforation diameter of 0.5–1.5 mm and a porosity of 15%–25%, ensuring uniform airflow distribution and sufficient structural strength. The mesh size matches the plywood specifications.

[0090] Furthermore, such as Figure 28 , 29 As shown, the claw module includes a linear drive device 115, a clamping bracket 116, a first cylinder 117, a second connecting plate 118, a first rubber-coated screw 119, and a second rubber-coated screw 120. One end of the clamping bracket 116 is fixed to the slider of the linear drive device 115, and the other end of the clamping bracket 116 is provided with an extension 121 facing the billet conveying module. The end of the first cylinder 117 mounted on the clamping bracket 116 is equipped with the second connecting plate 118. One end of the second connecting plate 118 is equipped with the first rubber-coated screw 119, and the other end of the second connecting plate 118 is equipped with the second rubber-coated screw 120. The first cylinder 117 drives the first rubber-coated screw 119 and the second rubber-coated screw 120 to move towards or away from the extension 121 along the height direction. Furthermore, the metal screws of the first rubber-coated screw 119 and the second rubber-coated screw 120 are fixed to the second connecting plate 118. The diameter of the rubber-coated end face is 20-30mm, and it is made of high-friction, wear-resistant polyurethane material, which contacts the plywood. The clamping force is adjusted by a pneumatic pressure reducing valve to adapt to different thicknesses and materials of the board. The flexible rubber-coating design prevents surface scratches while increasing friction to achieve precise positioning and anti-slip fixation, ensuring that the board does not slip or deflect during subsequent conveying.

[0091] Furthermore, the baffle module includes a billet assembly frame constructed from the first profile 122 and the corner bracket 123, with a billet assembly frame foot cup 124 installed at the bottom of the billet assembly frame.

[0092] Furthermore, such as Figure 28As shown, the linear drive device 115 includes a first motor 125, a first motor mount 126, a profile base 127, a synchronous belt, and a slider. The profile base 127 is fixed to the billet assembly frame via a profile mounting seat 128. The first motor 125 is mounted on one end of the profile base 127 via the first motor mount 126. The first motor 125 drives the slider that cooperates with the synchronous belt. Further, a first cable chain bracket 129 is mounted on one side of the profile base 127. One end of the first cable chain 130 is fixed to the first cable chain bracket 129, and the other end of the first cable chain 130 is fixed to one end of a clamping bracket 116, which is also fixed to the slider, for following motion. Exemplarily, the linear drive device 115 uses a synchronous belt slide module. The first cable chain 130 is made of engineering PA66 material and has a hollow interior design to serve as a cable chain for protecting electrical and pneumatic cables. The hollow portion allows electrical and pneumatic connection lines to pass through, preventing the lines from tangling and obstructing movement.

[0093] Furthermore, such as Figure 30 As shown, the baffle module is installed on one side of the billet assembly frame and is located away from the billet conveying module when the billet discharge module is in the second initial position. The baffle module includes a second cylinder 131 and a baffle frame 132. The second cylinder 131 is fixed to the billet assembly frame via the baffle module mounting bracket 133. The baffle frame 132 is installed at the end of the second cylinder 131. The second cylinder 131 drives the baffle frame 132 to move along the height direction, so that the baffle frame 132 has a blocking position and a releasing position. When the billet discharge module is in the second initial position, the baffle frame 132 is located in the blocking position. In the blocking position, the upper end surface of the baffle frame 132 is higher than the maximum height of the plywood. When the baffle is in the releasing position, it can be used to move the billet discharge module from the second initial position to the first working position.

[0094] The aforementioned baffle module combines physical obstruction with logical signal feedback, serving as the core node for achieving "positioning-locking-release" closed-loop control. Driven by a pneumatic or electric linear actuator, the baffle 132 normally rises to 50–100 mm above the conveying plane, forming a physical barrier to block the forward path. Simultaneously, its position sensor (such as a magnetic switch) sends a "alignment complete and locked" signal to the PLC, confirming that the billet is stably in the target position and enters the waiting-to-transfer state. Upon receiving the "release permission" command, the baffle smoothly falls below the conveying plane, completely releasing the channel and allowing the aligned plywood to enter the next station.

[0095] Furthermore, such as Figures 26-27As shown, the first and second alignment units have the same structure. The first alignment unit is described here, comprising a first alignment base 134, a third cylinder 135, and a first alignment baffle 136. The first alignment base 134, fixed to the billet assembly frame, is used to mount the third cylinder 135, which drives the first alignment baffle 136 to move along a first direction. The second alignment unit comprises a second alignment base 137, a fourth cylinder 138, and a second alignment baffle 139. The second alignment base 137, fixed to the billet assembly frame, is used to mount the fourth cylinder 138, which drives the second alignment baffle 139 to move along a first direction.

[0096] As can be seen from the above technical solution, the first and second alignment units are arranged at intervals along the first direction on both sides of the second original position of the plywood assembly and discharge module. They are used to perform bidirectional synchronous alignment of the stacked plywood, complete corner alignment and center positioning, eliminate the cumulative offset error generated during the layer-by-layer stacking of single boards, and ensure that the geometric uniformity of the blank meets the stringent requirements of symmetry and thickness uniformity in the subsequent hot pressing process. The alignment baffle, as an execution component that directly acts on the side of the plywood, is perpendicular to the second negative pressure conveyor belt and is used to form a bidirectional constraint boundary for the lateral posture of the plywood. Its working surface is a wear-resistant steel panel that has been precision ground, and the surface can be covered with a polyurethane buffer layer with a thickness of 1-2mm to evenly distribute the contact stress when the pushing force is applied, avoid indentation or damage to the side of the plywood, and provide real-time feedback of its displacement to the PLC control system. The two alignment baffles are arranged strictly symmetrically, and their combined action realizes bidirectional, equidistant alignment of the plywood, ensuring the center positioning accuracy. The aligning base is made of high-strength cast iron or welded steel structure and is rigidly fixed to the billet assembly frame by bolts. The cylinders in the aligning unit are synchronously controlled by the PLC control system through a high-speed bus to perform constant speed, same direction and high synchronization pushing action. The pushing speed (adjustable from 0.1 to 0.5 m / s) and the final stroke (preset according to the plywood specifications) can be dynamically set on the HMI to achieve millimeter-level (±3 mm) positioning accuracy.

[0097] Furthermore, such as Figure 30 As shown, the billet assembly device also includes a guiding module, which is installed on the side of the baffle module away from the billet conveying module to guide the billet to the next station. Specifically, the guiding module includes a first bracket 140, a second bracket 141, a first shaft 142, and a guide wheel 143; one end of the first bracket 140 and the second bracket 141, which are arranged at intervals, is fixed to the billet assembly frame, and the other end of the first bracket 140 and the second bracket 141 is fixedly mounted on the first shaft 142, on which the guide wheel 143 is rotatably fitted.

[0098] Furthermore, such as Figure 33As shown, the billet discharge module includes a feeding transverse cylinder 144, a feeding transverse cylinder fixing plate 145, and a feeding push rod 146. The feeding transverse cylinder 144 is installed below the second negative pressure conveyor belt 110 via a first profile 122. The feeding push rod 146 is fixed to the feeding transverse cylinder 144 via the feeding transverse cylinder fixing plate 145 and bolts. The feeding transverse cylinder 144 drives the feeding push rod 146 to be movably arranged along the conveying direction following the feeding transverse cylinder fixing plate 145.

[0099] The optional working principle of the plywood assembly device is as follows: After the plywood assembly device is powered on, it enters the initial power-on state. The external second negative pressure fan 113 starts to establish a stable negative pressure field, enhance the normal constraint of the "plate-strip" interface, and suppress warping and floating. The plywood assembly conveying module conveys the plate conveyed by the upstream station along the conveying direction. The first cylinder 117 drives the first rubber-coated screw 119 and the second rubber-coated screw 120 to move closer to the extension 121 along the height direction to clamp the plate conveyed by the plywood assembly conveying module to the discharge side. Then, the linear drive device 115 drives the clamped plate to be conveyed along the conveying direction to a preset position above the plywood assembly discharge module. The first cylinder 117 drives the first rubber-coated screw 119 and the second rubber-coated screw 120 to move away from the extension 121 along the height direction to release the plate. The alignment module and the baffle module cooperate to stack multiple layers of plates to achieve plywood assembly. The plywood with completed plywood assembly is conveyed to the next station through the plywood assembly discharge module.

[0100] Furthermore, such as Figures 31-37 As shown, the hot pressing device includes an automatic feeding module, a lifting module, an automatic ejection module, a hydraulic module, a temperature control module, and a support platform. The automatic feeding module is connected to the second negative pressure conveyor belt 110 in the billet assembly device via a first profile 122. The support platform is installed on the upper part of the lower oil tank 158 in the hydraulic module and is located on the side of the automatic feeding module away from the pre-curing device. The automatic ejection module is installed on one side of the support platform. The lifting module is installed via the lower oil tank 158. Further, the lower oil tank 158 has two layers, with the upper layer being a hollow structure and the lower layer serving as an oil storage area.

[0101] Furthermore, such as Figure 31 As shown, the support platform includes a guide post 170, an upper fixed platform 169-1, a movable platform 169-2, and a lower fixed platform 169-3. The guide post 170 is located at the four corners of the upper fixed platform 169-1, the movable platform 169-2, and the lower fixed platform 169-3, which are arranged in parallel and at intervals. The upper fixed platform 169-1 and the lower fixed platform 169-3 are fixed to the guide post 170, and the movable platform 169-2 can slide relative to the guide post 170.

[0102] Furthermore, such as Figures 32-33As shown, the automatic feeding module includes a feeding transverse cylinder 144, a feeding transverse cylinder fixing plate 145, and a feeding push rod 146. The feeding transverse cylinder 144 is connected to the lower part of the second negative pressure conveyor belt 110 in the billet assembly device via a first profile 122. The feeding push rod 146 is fixed to the feeding transverse cylinder 144 via the feeding transverse cylinder fixing plate 145 and bolts. The feeding transverse cylinder 144 drives the feeding push rod 146 to be movably arranged along the conveying direction following the feeding transverse cylinder fixing plate 145. It should be noted that the automatic feeding module is the billet discharge module in the billet assembly device.

[0103] Furthermore, the feed push rod 146 adopts a fork arm form with a perforated portion; multiple lifting push rods 152 are provided, and when the feed push rod 146 is in the first working position, multiple lifting push rods 152 can pass through the perforation of the feed push rod 146 without interfering with each other; when the lifting push rod 152 is in the second working position, the feed push rod 146 can switch from the first working position to the second original position.

[0104] Furthermore, such as Figure 34 As shown, the lifting module includes a lifting telescopic cylinder 149, a fixing rod 151, a lifting push rod 152, and a base plate 153. The base plate 153 is installed on the upper layer of the lower oil tank 158 via the fixing rod 151. The lifting telescopic cylinder 149 is evenly fixed to the base plate 153 with screws, and the rod end of the lifting telescopic cylinder 149 is connected to one end of the lifting push rod 152 via a thread. The other end of the lifting push rod 152 passes through the lower oil tank 158, the lower fixing platform 169-3, and the lower heating plate 168 in sequence. The initial position of the lifting push rod 152 is set so that the end face of the lifting push rod 152 is flush with the upper end face of the opening of the lower heating plate 168. The lifting telescopic cylinder 149 pushes the lower lifting push rod 152 to be movable along the height direction.

[0105] Furthermore, such as Figure 35 As shown, the automatic ejection module includes an ejection transverse cylinder 154, an ejection transverse cylinder fixing plate 155, a T-shaped ejection push rod 156, and a support frame 157. The support frame 157 is fixed to the side of the lower fixed platform 169-3 by bolts. The ejection transverse cylinder 154 is fixed to the support frame 157 by bolts and is arranged at 90° with the feeding transverse cylinder 144. The T-shaped ejection push rod 156 is fixed to the slider of the ejection transverse cylinder 154 by the ejection transverse cylinder fixing plate 155 and bolts. The bottom surface of the working end of the T-shaped ejection push rod 156 is located on the same plane as the upper surface of the lower heating plate 168. The T-shaped ejection push rod 156 is movably set along the first direction by the pushing of the transverse ejection cylinder 154.

[0106] Furthermore, such as Figure 36As shown, the hydraulic module includes a pull-rope displacement sensor 148, a pressure sensor 150, a lower oil tank 158, an oil dipstick 160, a hot-press module motor 161, an oil pump 162, a solenoid valve 163, a hydraulic cylinder 164, a protective net 165, a hydraulic oil pipe 166, an upper oil tank 171, and a filling valve 172. The oil dipstick 160 is fixed to the lower side window of the lower oil tank 158. The oil pump 162 is connected to the hot-press module motor 161, and both are fixed to the upper layer of the lower oil tank 158. The oil pump 162 is connected to the oil storage area of ​​the lower oil tank 158 through the hydraulic oil pipe 166. The solenoid valve 163 is fixed to the upper layer of the lower oil tank 158 with bolts and is connected to the lower oil tank 158 through the hydraulic oil pipe 166. The system is connected to the oil pump 162 and the hydraulic cylinder 164; the body of the pull rope displacement sensor 148 is fixed to the upper fixed platform 169-1, and the rope end of the pull rope displacement sensor 148 is fixed to the moving platform 169-2; the protective net 165 is fixed around the support platform; the upper oil tank 171, fixed to the upper fixed platform 169-1, is connected to the filling valve 172 on the hydraulic cylinder 164, and is connected to the oil storage area of ​​the lower oil tank 158 through the hydraulic oil pipe 166; the end of the hydraulic cylinder 164 is fixed to the moving platform 169-2 through a flange and high-strength bolts; the pressure sensor 150 is installed on the hydraulic cylinder 164 to measure the pressure applied by the hydraulic cylinder 164.

[0107] Furthermore, such as Figure 36 As shown, the temperature control module includes an upper heating plate 167 and a lower heating plate 168 with internal heating elements 159, and also includes a temperature sensor 173 and a PID temperature controller 175. The upper heating plate 167 is fixed on the side of the moving platform 169-2 away from the hydraulic cylinder 164. The lower heating plate 168 is fixed to the lower fixed platform 169-3 by bolts. The lower heating plate 168 has evenly spaced holes for lifting the push rod 152 to move in and out. The upper heating plate 167 and the lower heating plate 168 are arranged in parallel. Temperature sensors 173 are evenly distributed and fixed inside the upper heating plate 167 and the lower heating plate 168 respectively. The fourth electrical control box 174 is fixed on the side of the box body and faces the feeding push rod 146. The PID temperature controller 175 and the PLC are installed inside the fourth electrical control box 174. The HMI fixing plate 176 fixes the HMI 177, emergency stop button, start button, stop button, and power knob. The upper heating plate 167 and the lower heating plate 168 use nickel-chromium alloy heating rods as heating elements.

[0108] The optional working process of the hot pressing device is described below: After the hot pressing device is powered on, it enters the initial power-on state. The initialization process is as follows: the feeding transverse cylinder 144 drives the feeding push rod 146 back to the initial position of the feeding transverse cylinder 144 (i.e., the billet assembly position of the billet assembly device, i.e., the second original position); the lifting telescopic cylinder 149 drives the lifting push rod 152 back to the initial position of the lifting telescopic cylinder 149 (i.e., the third original position, where the lifting push rod 152 has not extended from the lower heating plate 168); the ejection transverse cylinder 154 drives the T-shaped push rod 156 back to the initial position of the ejection transverse cylinder 154. That is, in the fourth initial position, the T-shaped push rod 156 has not extended to the upper end face of the lower heating plate 168. The hydraulic cylinder 164 drives the upper heating plate 167 back to the initial position of the hot pressing device (that is, in the fifth initial position, the upper heating plate 167 and the lower heating plate 168 are arranged at intervals, which can be used for the position switching of the feeding push rod 146 and the position switching of the lifting push rod 152). After the equipment initialization and the equipment parameters are adjusted, the operator opens the hot pressing device monitoring interface in the production line control interface on the PC, clicks to switch to automatic mode, and synchronizes the start information to the PC. The required process parameters (temperature and pressure) are set on the PC. After receiving the billet assembly completion signal from the billet assembly station, the PLC first drives the feeding transverse cylinder 144 to move the feeding push rod 146. After reaching the limit, the feeding push rod 146 moves to directly above the lower heating plate 168. At this time, the lifting telescopic cylinder 149 drives the lifting push rod 152 to move. After the lifting push rod 152 rises to the limit, it drives the feeding push rod 146 back to the initial position. Then, the lifting push rod 152 returns to the initial position. The temperature sensor 173 in the upper heating plate 167 and the pressure sensor 173 in the lower heating plate 168 are activated. Force sensor 150 and rope displacement sensor 148 feed signals back to the PLC, which displays the real-time status via HMI 177. The PLC drives hydraulic cylinder 164 to lower the upper heating plate 167 until it contacts the plywood and is hot-pressed to the predetermined process parameters for the required time. Then, hydraulic cylinder 164 drives the upper heating plate 167 back to its initial position. Next, lifting telescopic cylinder 149 drives lifting push rod 152 to rise to its upper limit and then lower it back to its initial position to prevent the hot-pressed plywood from sticking to the lower heating plate 168. After this is completed, push-out transverse cylinder 154 drives T-shaped push rod 156 to its limit and push it onto transplanter 178. T-shaped push rod 156 then returns to its initial position. This process continues cyclically as the plywood is fed until the required thickness and number of layers are reached, at which point the PLC stops the equipment.

[0109] The transplanter 178 is a commercially available product. The feeding transverse cylinder 144 and the pushing transverse cylinder 154 are rodless cylinders, and cylinder limit sensors 147 are provided at the start and end positions of their strokes. The lifting and telescopic cylinder 149 is a standard cylinder, and cylinder limit sensors are provided at the start and end positions of its stroke.

[0110] As can be seen from the above technical solution, the automatic feeding module in this invention adopts a combination of cylinder and feeding push rod. The cylinder is a standardized component, making replacement convenient in case of failure. Compared with hydraulic systems, cylinders do not require complex pump stations and oil circuits, resulting in lower procurement, installation, and debugging costs. The pneumatic control logic is simple, and the thrust and speed can be adjusted through a throttle valve, making debugging less challenging and production line modifications more flexible. Cylinders are easily integrated with photoelectric sensors and limit switches to achieve a fully automatic process of "material arrival → pushing → arrival detection → retraction," seamlessly connecting with the working rhythm of the hot press. Profile connections are mostly bolted structures, making disassembly and adjustment of the fork arm position or length more convenient. Compared with suction cups (prone to leaving marks) and single-point push rods (prone to pressure damage), the fork arm type of push rod is more suitable for surface-sensitive materials such as sheet metal and molded parts, avoiding appearance damage. The lifting module employs a jacking mechanism with a unique arrangement of six evenly distributed push rods. This allows the plywood from the assembly station to automatically enter the receiving station when it arrives at the hot pressing station. The six push rods evenly support the plywood surface. Ideally, each push rod bears a force of F / 6 (ignoring eccentricity and installation errors). Compared to fewer push rods, the force on a single point on the plywood surface is significantly reduced, avoiding localized stress concentration. The six push rods form a symmetrical support matrix, which can counteract the torque generated by the plywood's center of gravity shift, preventing the plywood from tilting. This avoids additional stress caused by the plywood tilting during feeding. The lifting push rods in the lifting module provide precise docking and cooperation with the automatic feeding module, allowing the push rods to pass precisely through the gaps in the feeding push rods, enabling the feeding mechanism to operate automatically. Furthermore, this lifting module effectively solves the problem that when excessive glue is applied to the plywood, after hot pressing, the bottom layer of the plywood will stick to the lower heating plate due to excessive glue seepage, preventing the plywood from successfully entering the next station. This design avoids the risks of manual operation and utilizes a pneumatic cylinder structure, resulting in simple pneumatic control logic. The hydraulic module employs a solenoid valve 163 combined with a filling valve 172, with internal valves forming three circuits to achieve the hydraulic cylinder's rising, falling, and rapid falling modes. The filling valve's internal check valve opens under pressure during rising, allowing hydraulic oil in the small chamber of the hydraulic cylinder to return to the upper tank. The overflow valve in the hydraulic circuit allows oil to return to the lower tank when the circuit is not connected, and also provides overpressure protection during startup. The motor uses a servo motor to achieve synchronous pressure holding operation. The servo motor directly drives the pump, adjusting speed / displacement in real time, achieving pressure and flow control accuracy of ±1%. Combined with the millisecond-level switching of the solenoid valve, it achieves a precise process rhythm of "fast advance → slow pressure → stable pressure holding" for the cylinder. The servo motor, in conjunction with the solenoid valve and the overflow valve in the circuit, corrects pressure / flow deviations in real time, making the entire hot pressing process simple and convenient to operate, with precise pressure control. The design is efficient, intelligent, and compact, suitable for miniaturized and automated production lines. The heating element and temperature sensor of the temperature control module are directly embedded inside the upper and lower heating plates.Zero-distance sensor feedback: The sensor is in direct contact with the heating zone, with a temperature sampling delay of <0.1s, 3-5 times faster than external sensors. PID control dynamically adjusts based on real-time temperature differences, keeping temperature fluctuations within ±1℃, perfectly matching the stringent temperature requirements of hot pressing. Heating elements dissipate heat from within the upper and lower heating plates, resulting in more uniform heat distribution. Built-in elements reduce external piping, are resistant to vibration and dust interference, and are suitable for long-term, high-frequency operation of hot presses. PID precise power control reduces energy consumption by 20% compared to traditional control methods and avoids ineffective energy consumption due to temperature oscillations, significantly improving energy efficiency. This solves the problems of uneven temperature, large fluctuations, and slow response. The automatic ejection module also uses a cylinder structure. Its T-shaped push rod has a forklift-like design, and its bottom surface can perfectly fit the lower heating plate, allowing even thin plates to be ejected to the next workstation. Low cost, simple and convenient pneumatic control logic.

[0111] Furthermore, a circulating station is provided to connect the hot pressing station and the single-board loading work. The circulating station is operated manually or by a circulating device. The circulating device can be an automated guided vehicle, an industrial robot with a robotic arm, etc. (For example, in the case of a long production line, the industrial robot can be mounted on a linear conveyor to work). The robotic arm of the industrial robot transfers the intermediate plywood output from the hot pressing station to the storage area of ​​the single-board loading device to complete the closed-loop cycle of the production line.

[0112] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pre-curing device for applying adhesive in a plywood circulating thickening production line, characterized in that, It includes a board conveying device for the glue application and pre-curing station, a first inspection device for the glue application and pre-curing station, a second inspection device for the glue application and pre-curing station, a glue application gantry device, a flexible single-sided glue application device, and a pre-curing unit; The adhesive pre-curing station board conveying device is used to convey boards; the adhesive pre-curing station board conveying device is sequentially equipped with an adhesive pre-curing station first detection device, an adhesive gantry device, an adhesive pre-curing station second detection device, and a pre-curing unit along the conveying direction. The first detection device and the second detection device of the adhesive pre-curing station cooperate to drive the end effector in the adhesive gantry device to be movably arranged in the height direction; by movably arranging the end effector in the height direction, the flexible single-sided adhesive applicator connected to the end effector has at least a first initial position and an adhesive working position; When the flexible single-sided adhesive applicator is in the first initial position, the board conveyed on the adhesive pre-curing station board conveying device passes directly through; When the flexible single-sided adhesive applicator is in the adhesive application position, adhesive is applied to the board conveyed by the adhesive pre-curing station board conveying device.

2. The adhesive pre-curing device for the plywood circulating thickening production line according to claim 1, characterized in that, The first detection device of the glue application pre-curing station includes a first laser sensor (48) for the glue application pre-curing station, which is used to detect the board material conveyed on the board material conveying device of the glue application pre-curing station located on the feed side of the flexible single-sided glue application device. The second detection device at the glue application pre-curing station includes a second laser sensor (50) for detecting the board material being conveyed on the board material conveying device at the glue application pre-curing station and located on the discharge side of the flexible single-sided glue application device.

3. The adhesive pre-curing device for the plywood circulating thickening production line according to claim 1, characterized in that, The flexible single-sided adhesive application device includes an adhesive application stepper motor (55), a middle layer plate (60), an adhesive application device chain (67), a feeding shaft (70), a feeding roller (71), an adhesive application drive sprocket (75), a glue replenishing roller gear (76), an adhesive application driven sprocket (77), a glue coating roller gear (78), a glue storage tank (81), a glue replenishing shaft (82), a glue coating shaft (83), a glue replenishing roller (88), a glue coating roller (89), and a glue feeding hopper (93). A slot is cut into the middle layer plate (60) located above the adhesive application pre-curing station board conveying device, and the glue feeding hopper (93) is arranged in communication with the slot. The feeding shaft (70), the glue storage tank (81), and the glue coating hopper are installed at intervals along the conveying direction on the side of the middle layer plate (60) near the adhesive application pre-curing station board conveying device. A feeding roller (71) is installed on the feeding shaft (70), a glue replenishing shaft (82) is installed on the glue storage tank (81), a glue replenishing roller (88) is installed on the glue replenishing shaft (82), and a glue coating roller (89) is installed on the glue coating shaft (83). One end of the glue application stepper motor (55) is connected to one end of the feeding shaft (70), and the other end of the feeding shaft (70) is equipped with a glue application drive sprocket (75). One end of the glue replenishing shaft (82) is equipped with a glue replenishing roller gear (76), and one end of the glue coating shaft (83) is equipped with a glue application driven sprocket (77) and a glue coating roller gear (78). The glue application drive sprocket (75) and the glue application driven sprocket (77) are connected by a glue application device chain (67), and the glue replenishing roller gear (76) and the glue application driven sprocket (77) mesh.

4. A control method for a glue application and pre-curing device in a plywood circulating thickening production line, characterized in that, include: Obtain the total number of plywoods O to be produced by the cyclic thickening production line and the number of veneer layers M in a single plywood; where M is an odd integer and is 3 or more. Based on the number of veneer layers M in a single plywood piece, determine the total number of cycles for the plywood cyclic thickening production line. ; The total quantity of plywood to be produced is used as the number of production groups per cycle of the plywood cyclic thickening production line. Each group of boards includes a first-end board, a middle-end board, and a last-end board. The first-end board, middle-end board, and last-end board are conveyed sequentially along the conveying direction. For the p-th cycle, the first-end board and the last-end board each consist of a single veneer. The number of veneers in the middle-end board increases with the cycle number p according to the law of 2p–1. Where 1≤p≤ And p is an integer; When the first detection device at the glue application pre-curing station detects that the first, middle, and last boards in the i-th group of boards have been sequentially delivered, it counts them. When the count for the i-th group of boards is less than 3, it drives the end-effector of the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device connected to the end-effector is in the glue application working position. When the second detection device at the glue application pre-curing station detects that the board has been delivered, it drives the end-effector of the glue application gantry device to move along the height direction, so that the flexible single-sided glue application device is in the first original position. When the count for the i-th group of boards is equal to 3, it resets the count of the first detection device at the glue application pre-curing station to zero, keeping the flexible single-sided glue application device in the first original position. Wherein, 1≤i≤0 and i is an integer.

5. A plywood circulating thickening production line, characterized in that, It includes an adhesive pre-curing device, wherein the adhesive pre-curing device is the adhesive pre-curing device according to any one of claims 1-3.

6. The plywood circulating thickening production line according to claim 5, characterized in that, The plywood circulating thickening production line also includes a veneer loading device as the next station above the glue application and pre-curing device; the veneer loading device includes: Multiple material storage mechanisms are provided, each of which has an inlet and an outlet. The cavity between the inlet and outlet is a material storage area. The material storage area is used to store single boards that match the conveying direction of the transport mechanism along the height direction. The material handling mechanism includes a loading telescopic cylinder (1), a loading vacuum suction cup (2), and a loading module motor (17). The loading telescopic cylinder (1) is used to drive the loading vacuum suction cup (2) to move along the height direction. The loading module motor (17) is used to drive the loading telescopic cylinder (1) and the loading vacuum suction cup (2) to move together along a first direction. The loading vacuum suction cup (2) is used to pick up any single board stored on the storage mechanism and to release the picked-up single board. The transport mechanism is used to transport the veneer to the next workstation along the conveying direction.

7. The plywood circulating thickening production line according to claim 5, characterized in that, The plywood circulating thickening production line also includes a blank assembly device, which is the next station after the glue application and pre-curing device.

8. The plywood circulating thickening production line according to claim 7, characterized in that, The billet assembly device includes: A billet conveying module, which is used to convey sheet metal along the conveying direction; The claw module is installed above the billet conveying module and is used to clamp the billet conveyed by the billet conveying module to the discharge side, and to convey the clamped billet along the conveying direction to the top of the billet discharge module for release; A billet discharge module is installed below the negative pressure conveyor belt (110) in the billet conveying module; the billet discharge module includes a feeding push rod (146), which is movably arranged along the conveying direction, such that the feeding push rod (146) has at least a second initial position and a first working position; when the feeding push rod (146) is in the second initial position, the feeding push rod (146) is used to place the board released by the claw module and perform billet assembly; when the feeding push rod (146) moves from the second initial position to the first working position, the assembled plywood is conveyed to the next working position; A baffle module, wherein the baffle module is movably disposed along the height direction; The alignment module includes a first alignment unit and a second alignment unit. The first alignment unit and the second alignment unit are arranged at intervals along a first direction on both sides of the second original position of the billet discharge module. The first alignment unit and the second alignment unit move closer or further away along the first direction to align the plates on the billet discharge module.

9. The plywood circulating thickening production line according to claim 7, characterized in that, The plywood circulation thickening production line also includes a hot pressing device as the next station after the billet assembly device.

10. The plywood circulating thickening production line according to claim 9, characterized in that, The hot pressing device includes: an automatic feeding module, a lifting module, an automatic ejection module, a hydraulic module, and a temperature control module. The temperature control module includes an upper heating plate (167) and a lower heating plate (168). The feeding push rod (146) of the automatic feeding module is movably arranged along the conveying direction, so that the feeding push rod (146) has at least a second initial position and a first working position; the lifting push rod (152) of the lifting module is movably arranged along the height direction, so that the lifting push rod (152) has at least a third initial position and a second working position; the ejection push rod (156) of the automatic ejection module is movably arranged along the first direction, so that the ejection push rod (156) has at least a fourth initial position and a third working position; the hydraulic module drives the upper heating plate (167) of the temperature control module to be movably arranged along the height direction, so that the upper heating plate (167) has at least a fifth initial position and a fourth working position; When the lifting push rod (152) is in the third original position, the pushing push rod (156) is in the fourth original position, and the upper heating plate (167) is in the fifth original position, the feeding push rod (146) is switched from the second original position to the first working position; when the feeding push rod (146) is in the first working position, the pushing push rod (156) is in the fourth original position, and the upper heating plate (167) is in the fifth original position, the lifting push rod (152) is switched from the third original position to the second working position; when the lifting push rod (152) is in the second working position, the pushing push rod (156) is in the fourth original position, and the upper heating plate (167) is in the fifth original position, the feeding push rod (146) is switched from the first working position to the fifth working position. Second initial position; when the feeding push rod (146) is in the second initial position, the lifting push rod (152) is in the third initial position, and the pushing push rod (156) is in the fourth initial position, the hydraulic module drives the upper heating plate (167) in the temperature control module to move from the fifth initial position to the lower heating plate (168) along the height direction to the fourth working position of the preset position, so that the upper heating plate (167) and the lower heating plate (168) cooperate to heat press the plate between them; when the feeding push rod (146) is in the second initial position, the lifting push rod (152) is in the third initial position, and the upper heating plate (167) is in the fifth initial position, the pushing push rod (156) is switched from the fourth initial position to the third working position.

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