Automated production line for standard-length compressed lumber

Abstract

To provide an automatic production line for a compacted wood in a standard size including a transportation chain mechanism and an operation apparatus.SOLUTION: An operation apparatus includes: a first infrared preheating part in which an infrared irradiation passage is arranged so as to perform irradiation temperature rise on progressive wood plates; a water layer attaching part that is arranged so as to coat a water layer on surfaces of the heated-up wood plates from the first infrared preheating part; a second infrared preheating part in which the infrared irradiation passage is arranged so as to perform secondary irradiation temperature rise on the wood plates attached with the progressive water layer; a high frequency wave hot press part in which a high frequency hot press apparatus is arranged so as to perform heat-up compression processing and cure processing on the wood plates processed by preheating; a cooling part in which a coolant temperature drop passage is arranged so as to cool progressive compacted blocks compacted with the high frequency hot press part; and an operation device that is connected to an electric mechanical control system of each part, wherein each part corresponding to a transportation chain mechanism is an independent transportation unit. The production line has merits of low cost in the apparatus, high processing efficiency, and high degree of automation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of wood board processing technology, and in particular to an automated production line for compacted timber to length. [Background technology]

[0002] Compressed wood is a hard, dense, and strong reinforced material made by hot pressing wooden boards. After the wood board is compressed and densified, its structure and physical and mechanical properties all undergo significant changes - its mechanical strength increases, its deformation decreases, and it has excellent wear resistance and durability, which effectively improves the performance of the wood board and increases its utility value.

[0003] Compared with the conventional method of contact heating using heat transfer oil or steam followed by compression, the applicant's researched high frequency application technology for compacted wood boards has an ideal softening time for compacted wood boards, with a short softening time and low energy consumption. The technical solution of the patent CN201910181348.8 high frequency compacted wood board combination production line solves the technical problem of serious springback caused by ultra-short compression using high frequency and the shortcomings of the conventional compacted wood board factory application equipment. However, when using high frequency for preheating, the wood boards enter the preheating station one by one for high frequency preheating, which results in low mass production efficiency. The water-cooled and air-cooled refrigeration equipment used has low operating efficiency and a long production process. The adhesive application and bonding equipment also has technical problems of low production efficiency in application. Therefore, the actual application of the production line still faces technical problems of difficulty in mass production and high costs.

[0004] In addition, hairlines generally exist on the surface of compacted wood boards produced using conventional technology, and when the hairlines are obvious and widely distributed on the surface of the wood board, the surface of the wood board feels uneven to the touch and has a poor aesthetic appearance. Summary of the Invention [Problem to be solved by the invention]

[0005] To solve the above technical problems, the present invention provides an automated production line for sized compressed timber, which is a production system with low equipment costs, high processing efficiency and a high degree of automation. [Means for solving the problem]

[0006] The specific technical solutions of the present invention are as follows:

[0007] The present invention provides an automated production line for compacted timber to length, the production line including a conveyor chain mechanism and operating devices that are sequentially installed on the conveyor chain mechanism according to the wood board processing flow, and the operating devices sequentially: A first infrared preheating unit in which an infrared irradiation passage is arranged to irradiate and heat the traveling wooden board; A water layer application unit arranged to apply a water layer to the surface of the wood board preheated by the first infrared preheating unit by water spraying or a coating roll method; A second infrared preheating unit is arranged so that the infrared irradiation passage performs a secondary irradiation heating on the wooden board having the progressive water layer attached thereto; a high-frequency hot press unit in which a high-frequency heat pressure device is disposed to perform heat compression and hardening treatment on the preheated wood board; a cooling section in which a refrigerant cooling passage is arranged to cool the progressively compacted wood block compacted by the high frequency hot press section; an operating device connected to the electromechanical control system of each section; Each of the sections corresponding to the conveyor chain mechanism is provided with an independent conveyor unit.

[0008] In the first improvement of the production line operating equipment, other conventional preheating methods are replaced with an infrared preheating unit with a long infrared radiation path, which ensures that the wooden boards are still sufficiently preheated during the assembly line.

[0009] Regarding the second improvement of the operating equipment, the water layer attachment part can adopt a sprinkler device that sprays water along the diameter of the wooden board, or a sweeping or roll application device that applies the water layer to the wooden board in a draining manner. The technical solution for applying the water layer by roll application is preferred.

[0010] Regarding the third improvement of the operating device, the high-frequency hot pressing section includes a high-frequency hot pressing device installed at the front and rear along two sets of conveying chains to perform heat compression and hardening treatments on the wooden boards, and an automatic wooden board transport device installed at the inlet side of the high-frequency hot pressing device.

[0011] Regarding the fourth improvement of the operating equipment, the cooling section adopts a rapid cooling method that mainly uses coolant and supplements it with air cooling.

[0012] The fifth improvement of the operating equipment will increase the number of automated vertical and horizontal joints, which will not only greatly simplify production operations but also further improve production efficiency. [Effects of the Invention]

[0013] The automated production line for densified timber to length provided by this invention is a production mode that adopts a fully automatic, highly efficient flow line, and greatly improves production efficiency by lengthening the movement path of the preheating and cooling sections, and by using a preheating and cooling method and multiple sets of high-frequency cross-installation. In the sufficiently long production equipment space, processes such as preheating, heat compression, automatic vertical and horizontal joining, and sizing can be integrated into one regular whole, eliminating the time required for transporting wood boards and improving the scale of production for enterprises. Furthermore, the production line of this invention adds a water layer attachment section to the preheating section, which minimizes hairlines on the surface of the wood boards. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a structural schematic diagram of one embodiment of an automated production line for compacted logs; FIG. [Figure 2] FIG. 10 is a structural schematic diagram of another embodiment of an automated production line for densified logs. [Figure 3]FIG. 2 is a structural schematic diagram of an embodiment of an infrared preheating unit. [Figure 4] FIG. 1 is a structural schematic diagram of an embodiment of a water layer attachment portion. [Figure 5] FIG. 2 is a structural schematic diagram of one embodiment of a high-frequency hot-press unit. [Figure 6] FIG. 10 is a structural schematic diagram of another embodiment of the high-frequency hot-press unit. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 2 is a structural schematic diagram of the inlet end of the cooling section. [Figure 10] FIG. 1 is a structural schematic diagram of some equipment for vertical joints of wooden boards. [Figure 11] FIG. 10 is a structural schematic diagram of another part of the equipment of the longitudinal joint of the wooden board. [Figure 12] FIG. 2 is a schematic diagram of the structure of the ruler section equipment. [Figure 13] FIG. 1 is a structural schematic diagram of one high frequency device driving two high frequency hot pressing machines. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following examples further illustrate the present invention but should not be construed as limiting it. Any modifications or substitutions to the methods, steps, or conditions of the present invention that do not depart from the spirit and substance of the present invention are within the scope of the present invention.

[0016] The present invention is an automated production line for compacted lumber, which is used to carry out at least the steps of preheating, high frequency, pressurizing and cooling of cut wood boards as they are conveyed through a conveyor chain, and the automated operation efficiency of the assembly line is extremely high. In the design means of the production line of the present invention, the production line includes at least various operating devices installed according to the wood board processing process and a conveyor chain mechanism that runs from front to back based on the characteristics and mechanical structure of each operating device.

[0017] As shown in FIG. 1, the operating device includes: A first infrared preheating unit 1 in which an infrared irradiation passage is arranged to irradiate and heat a traveling wooden board; a water layer applying unit (2) arranged to apply a water layer to the surface of the wooden board preheated by the first infrared preheating unit (1); A second infrared preheating unit 3 is arranged so that the infrared irradiation passage performs a secondary irradiation heating on the wooden board having the advancing water layer attached thereto; a high-frequency hot press unit 4 in which a high-frequency heat pressure device is arranged to perform heat compression and hardening treatment on the preheated wood board; a cooling section 5 in which a refrigerant cooling passage is arranged to cool the advancing wooden board compressed by the high frequency hot press section 4; an operating device connected to the electromechanical control system of each section; Each part corresponding to the conveyor chain mechanism is an independent conveyor unit.

[0018] In one refinement, as shown in FIG. 2, after the cooling section 5: a longitudinal joint 6 arranged to saw the end of the advancing compacted wood block into a sawtooth shape, and then roll adhesive onto the sawtooth end to join adjacent compacted wood blocks along the longitudinal direction; A horizontal joint 7 is arranged to roll-apply adhesive to the side edges of the compacted wooden strips that have been joined in the vertical direction, and to join adjacent compacted wooden strips along the width direction; It further includes a ruler portion arranged to cut the joined compacted wood strips or compacted wood boards to a specified length.

[0019] The production line employs a structural design incorporating a first and second infrared preheating section and a water layer deposition section, which offers the advantages of lower cost and higher production capacity than conventional high-frequency preheating designs, while also reducing the occurrence of hairlines. The refrigerant-based cooling section effectively improves the cooling efficiency of the production line, ensuring that the entire preheating, compaction, and cooling process of the wooden boards is completed as they travel along the conveying chain, with a high degree of automation throughout the entire process. To provide a detailed explanation of the automated production line, the following describes each operating device.

[0020] The technical improvement for the first aspect of each operating device is an improvement to the infrared preheating unit. The first infrared preheating unit 1 and the second infrared preheating unit 3 in the embodiment of the present invention have the same technical solution (except for their different lengths). Here, the infrared preheating unit will be collectively referred to as the infrared preheating unit to describe its specific structure. The infrared preheating unit is equipped with an infrared radiation passage 10. As shown in FIG. 3, the conveying unit corresponding to the infrared preheating unit is installed below the infrared radiation passage 10. Power-adjustable infrared lamp tubes 11 are uniformly installed along the direction of travel within the infrared radiation passage 10 above the infrared radiation passage 10. The spatial temperature of the infrared radiation passage 10 is adjusted based on the actual operating conditions and processing process. The corresponding conveying unit carries the wooden board and passes through the interior of the infrared radiation passage 10 below.

[0021] The infrared radiation passage 10 is a passage surrounded by a frame and a corresponding conveying unit, and the front and rear ends of the passage form an inlet and an outlet, respectively. The cross section of the passage may be rectangular, square, semicircular, edge-milled semi-elliptical, or other regular or irregular structures. Considering specific practicality, a passage with a rectangular cross section is generally adopted, as it has a simple structure and low manufacturing costs. A passage with an upper cross section having an arc-shaped structure may also be adopted, and several inclined infrared lamp tubes are installed inside the arc-shaped surface, so that the infrared lamp tubes can irradiate toward the wood board advancing station and better improve the preheating aging.

[0022] In one example of improvement to the infrared preheating section, temperature detectors are installed at the inlet and outlet ends of the infrared radiation passage 10 to detect the temperature of the wooden board, and the temperature value of the wooden board is detected immediately. The infrared preheating section control system calculates the lamp tube power and the conveying speed of the conveying unit required for the wooden board to reach the preheating standard temperature based on the temperature value, so that the temperature of the wooden board when it reaches the outlet reaches the preheating standard temperature.

[0023] In another example of an improvement to the infrared preheating section, a cover opening 13 with a cover plate 12 is installed on one or both side walls of the infrared radiation passage 10, and the cover plate 12 can be opened or removed. For example, as shown in Figure 3, this can be achieved by connecting the bottom of the cover plate 12 to the cover opening 13 with a hinge, and a handle is installed on the surface of the cover plate 12, which can be pulled to observe the preheating state of the internal wooden board. This structure makes it more convenient to perform maintenance and other operations on the long infrared radiation passage of the present invention.

[0024] In another example of improvement to the infrared preheating section, a reflector is installed on the inner wall of the infrared irradiation passage 10 to radiate the infrared radiation heat generated by the infrared lamp tube 11 in a predetermined direction. During use, the infrared rays are reflected and collected on the surface of the wooden board, making full use of the infrared radiation energy and further improving the preheating efficiency.

[0025] In yet another modification to the infrared preheating section, a light shielding plate 14 is installed above the entrance end of the infrared radiation passage 10.

[0026] The length of the infrared radiation path 10 of the infrared preheating unit of the present invention can be set according to the needs of the process, for example, the length of the infrared radiation path 10 is set to 5-15 cm. If the length of the infrared radiation path in the production line is constant, the speed of the conveying unit can be further adjusted to maintain the preheating temperature of the wooden board between 60°C and 100°C. For example, if the preheating temperature is 100°C, the speed rate is slowed, and if the preheating temperature is 60°C, the speed rate is fasted.

[0027] To ensure that the temperature of the wood board with the water layer attached is within the required standard range before entering the high-frequency hot pressing equipment, the specific production line of the present invention is equipped with at least two infrared preheating units, namely, a first infrared preheating unit 1 installed at the rear end of the water layer attachment unit and a second infrared preheating unit 3 installed at the front end of the water layer attachment unit. After the first infrared preheating unit 1 heats the wood board to the standard preheating temperature range, the wood board will lose some of its temperature after passing through the water layer attachment unit due to the flowing water. Therefore, the wood board with the water layer attached needs to enter the second infrared preheating unit 3 again to be irradiated and heated twice. The lengths of the first infrared preheating section 1 and the second infrared preheating section 3 are set according to the actual situation, as the initial temperatures of the first preheating and the second preheating are different. In one example, the length of the infrared radiation passage of the first infrared preheating section 1 is 13-15 m, and the length of the infrared radiation passage of the second infrared preheating section 3 is 5-8 m.

[0028] The second aspect of each operating device is an improvement to the water layer application unit. The water layer application unit 2 disclosed in the embodiment of the present invention includes several water layer application devices installed on the corresponding conveying unit of the water layer application unit 2. These devices can be sprinkler devices that spray water along the diameter of the wooden board, or sweeping or roll application devices that apply the water layer to the wooden board in a draining manner. In one example of the present invention, a water layer roll application device is selected to apply the water layer to the wooden board surface. As shown in FIG. 4, each water layer roll application device includes a case 20 installed above the corresponding conveying unit, a water injection mechanism and applicator roll member installed within the case 20, a water injection pump and applicator roll power mechanism installed on the side of the corresponding conveying unit, and a water tank installed on the side or bottom of the corresponding conveying unit.

[0029] The water injection mechanism is a water injection pipe 22 with at least one water injection nozzle 21, which is connected to the water tank. The spreader roll member includes a resin roller 23 installed at the front end in the direction of travel and a steel roller 24 installed at the rear end. The water injection nozzle 21 is installed above the steel roller 24 and sprays water above the steel roller 24. The water flows along the surface of the steel roller 24 and, as the steel roller 24 rotates, guides the water downward through the gaps between the two rollers onto a wooden board placed on the conveying unit below. In this technical solution, a spreader roll power mechanism is connected to the roller shaft of the steel roller 24, and an independent spreader roll power mechanism is connected to the roller shaft of the resin roller 23, or the same spreader roll power mechanism as the steel roller 24 may be shared by a transmission gear module. Alternatively, the resin roller may not be connected to the spreader roll power mechanism and may be installed in front of the resin roller 23 as a driven gear.

[0030] In one improvement of the water layer roll coating device, the gap between the resin roller 23 and the steel roller 24 is adjustable, and by adjusting the gap, the thickness of the water layer to be coated can be controlled.

[0031] In one modification of the water layer roll coating device, the top of the case 20 is open and is installed using a hinged cover plate 25 structure. The edge of the cover plate 25 is provided with a notch 26 into which the water injection pipe 22 is inserted. A water injection pump and a coating roll power mechanism are installed on the side of the housing 20.

[0032] For further improvement of the water layer roller coating device, drain grooves 28 connected to the housing 20 are installed below both ends of the roller coating member, and a drain port 27 sloping downward is installed at the bottom of one end of the drain groove 28. When two water layer roll coating devices are installed, the drain grooves 28 of the two water layer roll coating devices extend toward opposite sides and are close to each other, so that the drain ports 27 of the two drain grooves 28 on the same axis are close to each other and opposite each other, and drain ducts are installed on the conveying unit bracket below the two drain ports 27.

[0033] In another improvement of the water layer roller coating device, the water tank is further connected to a drain pipe, so that the water injection pipe pumps water from the water tank and then drains it onto the steel roller surface, and the excess water on the steel roller surface flows through the drain groove into the drain pipe and then returns to the water tank, forming a closed loop.

[0034] The technical solution for the water layer roll coating device in this invention allows the installation of multiple water layer roll coating devices or multiple coating roll members in the same housing depending on the process needs. For example, as shown in Figure 1, two water layer roll coating devices can be installed on a conveyor chain. Of course, one set of coating roll bodies can be installed per water layer roll coating device, or two sets of coating roll bodies can be installed per water layer roll coating device. Obviously, if two coatings are required, two of the former and one of the latter are required. The coating speed (the rotation speed of the roll members) usually matches the traveling speed of the conveying means. Furthermore, to achieve a compact machine configuration, a single water tank can be shared by multiple water layer roll coating devices.

[0035] The third improvement of each operating device is the improvement of the high-frequency hot press unit. The high-frequency hot press unit 4 disclosed in the embodiment of the present invention includes two high-frequency hot press devices installed in front and behind along two transmission chains, respectively, for performing heat compression and hardening treatment on the wooden board, and an automatic wooden board transmission device installed at the inlet of the high-frequency hot press devices.

[0036] 5, the high frequency hot pressing apparatus includes a vertically movable upper pressing plate 40, a hydraulic power mechanism 41 for driving the vertical movement of the upper pressing plate 40, a lower pressing plate 42 installed below, and a heating device for heating the upper pressing plate 40 and the lower pressing plate 42, the heating device being connected to the upper pressing plate 40 via an upper electrode and to the lower pressing plate 42 via a lower electrode. The high frequency hot pressing apparatus used in the present invention employs a conventional apparatus, and its specific structure will not be described here; those skilled in the art are familiar with the relevant techniques for high frequency hot pressing wood boards.

[0037] To automatically transport the preheated wooden board to the hot pressing position of the lower press plate, the present invention adds an automatic wooden board transport device, which can adopt a flexible robot arm structure to grasp the wooden board from the initial position to the target position, and can also be realized by adopting a combined structure of translational transmission and manual push.

[0038] In one specific embodiment, the automated wooden board transport device includes a moving conveying module and a mechanical pusher module, the moving conveying module including a fixed bracket 43, a translation mechanism 44, a moving plate frame 45 installed above the fixed bracket 43, a conveyor belt 46, and a conveying drive mechanism, a main sliding rail 47 and a sub-sliding rail 48 are installed on both sides above the fixed bracket 43, and sliders 49 that move on the sub-sliding rails 48 are installed on both ends of the moving plate frame 45. The translation mechanism 44 is installed on the side of the moving rack and includes a power mechanism and a sliding member that engages with the main sliding rail 47, the output shaft of the power mechanism is connected to the sliding member and moves the sliding member along the main sliding rail 47, thereby driving and translating the moving rack 45, wherein the sliding mechanism between the main sliding rail 47 and the sliding member may be a screw-nut structure, a sawtooth screw-nut structure, etc. In order to ensure smooth sliding of the movable rack 45, the bottom position of the movable rack 45 is higher than the upper surface of the lower pressure plate 42, the conveyor belt 46 rotates around the movable rack 45, and the conveyor driving force mechanism is arranged in a power mechanism that drives the rotation of the conveyor belt.

[0039] The mechanical pushing module includes a first baffle mechanism installed at the end of the movable rack 45, and a mechanical moving or rotating structure is installed in the first baffle mechanism to open or return the corresponding baffle from the blocked displacement. Specifically, the first baffle mechanism includes a first baffle frame 400, a first baffle 401, and a first pneumatic telescopic cylinder module 402. The first baffle frame 400 is a frame surrounded by side plates fixed at both ends to the sides of the movable plate frame 45 and a top plate installed at the top and connected to the side plates. The top of the first baffle 401 is hingedly connected to the top plate of the first baffle frame 400, and the side walls of the first baffle 401 are connected to the side plates by telescopic cylinders. The first baffle 401 is attached to the front surface of the side plates in a vertical state, and the bottom surface of the first baffle 401 is close to or contacts the top surface of the conveyor belt 46 of the movable rack 45. When the telescopic cylinder extends, the piston of the telescopic cylinder extends outward, and the first baffle receives an external thrust, rotating around the top hinge position and flipping upward. When the telescopic cylinder retracts, the piston of the telescopic cylinder retracts into the cylinder tube, and the piston rod drives the first baffle to flip downward and adhere to the end surface of the side panel, thereby reaching a vertical position.

[0040] When the automated wooden board transport device is in use, the first baffle is initially in a vertical position, and the preheated wooden board is transferred from the previous transport unit to the transport belt of the movable rack. The transport belt then starts to operate, bringing the front of the wooden board into contact with the rear of the first baffle. The movable rack then moves forward along the main slide rail, moving forward to the hot pressing station. The first baffle opens, and the transport belt starts to operate. The movable rack then moves backward along the main slide rail, and the wooden board is then thrust forward by the transport belt, dropping it into the hot pressing station of the lower platen. The movable rack then returns to its initial position, and the first baffle returns to its vertical shift position. At the same time, the upper press platen presses down to hot press the wooden board. After the hot pressing is complete, the upper press platen moves up, and the movable rack moves forward, pushing the hot-pressed wooden board forward into the next transport unit. The first baffle then immediately opens and places the next wooden board in the hot pressing station of the lower press platen. This cycle is repeated, greatly improving hot pressing efficiency.

[0041] This is an improvement to an automatic wooden board transport device, in which a second baffle mechanism is installed behind the first baffle mechanism, and the structure of the second baffle mechanism is similar to the first baffle structure, and is specifically as follows. The second baffle mechanism includes a second baffle frame 406, a second baffle 405, and a telescopic cylinder 407. The second baffle frame 406 is a frame surrounded by side panels fixed to the sides of the movable plate frame 45 at both ends and a top panel installed on the top and connected to the side panels. The top of the second baffle 405 is hingedly connected to the end of the piston rod of the second pneumatic telescopic rod module 407. A support mechanism 408 fixed to the top panel of the second baffle frame 405 is installed below the piston rod. The piston rod of the second pneumatic telescopic rod module 407 is connected to the support mechanism 408 so as to be axially movable. For example, the piston rod of 407 is fixed to the support mechanism 408 using a socket. The second baffle 405 is attached vertically to the front surface of the side panel. There is a gap between the bottom of the second baffle 405 and the conveyor belt 46 of the movable plate frame 45, the height of the gap being slightly higher than the height of the wooden board.

[0042] Another improvement of the present invention is to stack multiple wooden boards one on top of the other and then perform high-frequency hot pressing. For example, three wooden boards can be stacked and then hot pressed to form a compacted wooden board strip (three-way compression), which mainly achieves the aligned stacking of multiple wooden boards. Similarly, multiple wooden boards can be stacked and then hot pressed using a robot arm. This can also be improved based on the above-mentioned combined structural solution of translational transport and pushing hands. As shown in Figure 6, a front positioning hole 420 is provided on the front side of the lower pressure plate 42, and a positioning mechanism 421 is provided at a position corresponding to the front positioning hole 420. The positioning mechanism 421 includes a telescopic lever or a rotary lever. Telescopic push rod mechanisms 422 are provided on both sides of the lower platen 42, extending toward the center of the lower platen 42. Positioning plates 423 are attached to the ends of the push rods of the telescopic push rod mechanisms 422, which are used to adjust and position the radial displacement of the multiple stacked corks. In this technical solution, the height of the bottom position of the movable rack 45 and the surface of the lower pressure plate 42 is slightly higher than the height of the three stacked wooden boards, ensuring that the movement of the movable rack 42 is not affected when the three stacked wooden boards are being stacked. In this technical solution, the telescopic push rod mechanisms are located on the sides of the bases 425 on both sides of the lower platen 42, and when their telescopic rods are in a retracted state, the positioning plates are located outside the movement path of the movable plate frame and outside the orthographic projection plane of the upper platen, i.e., when their telescopic rods are in a retracted state, the positioning plates do not interfere with the axial movement of the movable rack and the downward hot-pressing operation of the upper press plate. The height of the positioning plates is equal to or higher than the stacked height of the three stacked wooden boards.

[0043] Based on the above method, the upper, middle and lower wooden boards are sequentially pressed into the hot pressing station, then the positioning mechanism in the front positioning hole extends and positions itself in front of the multi-layer wooden board. At the same time, the first baffle of the rear movable rack positions itself in the vertical shift position and moves forward to press the three wooden boards into the front positioning mechanism, aligning their front ends. The telescopic push rods on both sides extend oppositely to align the radial positions of the three wooden boards. Then the telescopic push rods retract and retract. At the same time, the positioning mechanism moves into the positioning hole to hot press the laminated wooden boards, and the wooden boards are pressed together under direct and indirect pressure. When the hot pressing is completed, the movable rack moves forward, and its first baffle pushes the pressed compacted wood to the next stage of conveying unit.

[0044] The fourth aspect of the improvement of each operating device is an improvement to the high-frequency heating press unit. As shown in Figures 7-9, the cooling unit 5 disclosed in the embodiment of the present invention includes a mobile cooling passage 50 installed above the corresponding conveying unit, a coolant sprinkler module installed above the mobile cooling passage 50, a coolant storage box 51 installed on the side of the mobile cooling passage 50, and its control device 52. The coolant can be liquid nitrogen, and the internal temperature of the liquid nitrogen refrigerator-freezer is approximately -130°C to -150°C. The length of the mobile cooling passage 50 is 10-15 m.

[0045] The coolant sprinkling module includes a transport pipe 53 connected to the coolant storage box 51 and liquid spray pipes connected to the transport pipe 53, branching upward within the passage and uniformly distributed, with liquid spray nozzles uniformly distributed at the bottom of the liquid spray pipes. Alternatively, the cooling efficiency can be improved by adding an air-cooling unit within the moving cooling passage 50. The air-cooling unit includes a fan and a fan motor 54 connected to the fan. The fans are installed alternately with the liquid injection pipes within the passage, and the fan motor 54 is installed at the top of the moving cooling passage 50.

[0046] Based on the above technical solutions, as shown in FIG. 2, the sixth improvement of the operating device of the present invention is that a vertical joint 6 and a horizontal joint 7 are sequentially installed after the cooling section.

[0047] The conveying unit corresponding to the vertical joint 6 is a horizontal conveying stage 61 connected to the vertical conveying stage 60 of the cooling section conveying unit, and a push rod at the end of the vertical conveying stage 60 pushes the compacted wood blocks onto the horizontal conveying stage 61. In the solution shown in Figure 10, a plurality of conveying rollers 601 are installed at intervals at the end of the vertical conveying segment 60, horizontal conveying chains 610 are installed in the spaces between the conveying rollers 601, and outwardly protruding push blocks 611 are installed on the chain of the horizontal conveying chain 610, the surface height of the horizontal conveying chain 610 is equal to or lower than the surface height of the conveying rollers 601, and the height of the push blocks 611 of the horizontal conveying chain 610 when rotating to the upper surface is higher than the surface height of the conveying rollers 601, thereby realizing the conversion of the compacted wood blocks from vertical conveying to horizontal conveying. A baffle member 62 is installed on the outside of the end of the vertical conveying segment 60, and when the compacted wood is conveyed from the vertical conveying segment to the horizontal conveying segment, the tip of the compacted wood block abuts against the baffle member 62, which is used to position the position as it moves horizontally.

[0048] The vertical splicing section 6 includes a sawtooth edge-cutting mechanism, a roller application mechanism, a splicing air consolidation mechanism, and a fixed-length air consolidation mechanism. The sawtooth edge-cutting mechanism is located near the beginning of the horizontal conveying stage 61, specifically on the outer side of the vertical conveying stage 60 in the axial plane. The sawtooth edge-cutting mechanism includes a roller bracket 69 installed on the side of the horizontal conveying stage 61, a sawtooth roller 63 installed within the roller bracket 69, a sawtooth roller power mechanism, and a lower positioning mechanism installed above the horizontal conveying stage 61. The sawtooth roller 63 is a roller wheel structure with sawtooth blades on its outer periphery. The sawtooth roller power mechanism provides roller cutting power to the sawtooth roller 63. The sawtooth roller 63 is connected to the roller bracket 69 via an adjustment mechanism, which may be a telescopic mechanism or a sliding mechanism that allows the sawtooth roller 63 to move vertically or radially, thereby positioning it at the station where it saws the end face of the compacted wood block. In the solution shown in Figure 10, slide blocks 630 are installed on both ends of the roller shaft of the sawtooth roller 63, and the slide blocks 630 are placed in slide grooves 631 installed in the roller holder 69. One end of the two roller shaft ends is fixedly connected via an interlocking fixed rod 632, to which a biasing mechanism is connected. The biasing mechanism at least comprises a mechanical mechanism for biasing the interlocking fixed rod forward, and may also comprise a mechanical mechanism for reciprocating forward and backward (such as a telescopic rod, gear engagement transmission, etc.). Another improvement is that the other end facing the other conveying stage is connected to the end face of the chute 631 via an elastic member. The biasing force of the biasing mechanism causes the interlocking fixed lever to bias the sawtooth roller toward the conveying belt, and the sawtooth roller performs sawtooth cutting on the end of the compacted wood block. Once the cutting is completed, the interlocking fixed lever moves the sawtooth roller outward due to the action of the restoring force of the elastic member or the backward movement of the mechanical mechanism.

[0049] According to the processing requirements of wood, the corresponding transmission segment can be provided with corresponding sawtooth edge cutting mechanisms on both sides, and the notched teeth of the sawtooth edge cutting mechanisms on both sides are interlocking and engaging with each other.

[0050] The lower positioning mechanism includes a lower positioning plate and a telescopic power device installed above the lower positioning plate. A telescopic bar 660, such as an air telescopic piston, is installed below the horizontal feed belt at this position. In use, the compacted wood block moves from the vertical conveying stage to the beginning of the horizontal conveying stage. The leading end of the compacted wood block is received by the stopper plate. The block then moves horizontally to the roller cutting station. The columnar stopper extends to receive the block at the roller cutting station. The lower positioning plate then moves downward to hold the compacted wood block. The sawtooth roller saws the end of the compacted wood to produce a splice plate block with a sawtooth end.

[0051] The roller application mechanism is disposed on the next horizontal conveying stage 61 cut by the sawtooth end, and as shown in FIG. 10, the roller application mechanism includes a cavity 65 for accommodating the resin slurry, a stirring rod 66 installed in the cavity 65, an application roll 67, a slurry drain pipe 68, and a roller power mechanism, the slurry drain pipe 68 is installed at a position close to the surface of the application roll 67, the pipe inlet is located in the slurry, and the pipe outlet is located above the surface of the application roll 67, and a small suction pump is connected to the drain pipe 68. The roller shaft of the spreader roll 67 is set vertically, the bottom of the roller shaft is connected to a roller power mechanism, and a number of spreader brushes 670 are set on the roller surface of the spreader roll 67. The spreader brushes 670 are used to evenly spread the resin slurry flowing out from the outlet of the slurry discharge pipe 68 onto the roller surface of the spreader roll 67. When a portion of the spreader roll 67 is exposed and the exposed roller surface faces the horizontal conveying stage 61, the resin slurry on the roller surface is used to spread the resin slurry onto the sawtooth end surfaces of the compacted wood blocks. Since the end surfaces of the compacted wood blocks to be spread are sawtooth, a layer of brush bristles can be provided corresponding to the surface of the spreader roll 47, allowing the slurry to be more effectively spread between the sawtooth edges.

[0052] Furthermore, to prevent displacement during application of the roller, a number of positioning rollers are arranged at intervals in the vertical direction above the horizontal conveying stage 61 corresponding to the position of the roller application mechanism. The positioning rollers are connected to the upper fixed brackets by pneumatic cylinders, which adjust the position of the positioning rollers to achieve positioning of the compacted wood blocks during application of the roller. After application of the roller is completed, the compacted wood blocks continue to be transported together with the conveying belt below.

[0053] Another improvement of the roller coating mechanism is to install a resin heating mechanism in the cavity, which allows resin powder, resin slurry or 20-40 mesh resin particles to be directly added and hot-melt stirred directly into the cavity to obtain a paste-like hot-melt resin.

[0054] The air consolidation mechanism is installed at the end of the horizontal conveying stage 61. As shown in FIG. 11, the air consolidation mechanism includes an upper consolidation plate 690 and a lower pallet 691, which are controlled by an air mechanism. A gap is formed between the upper consolidation plate 690 and the lower pallet 691 to hold the compacted wooden blocks. The conveying surface of the horizontal conveying stage 61 corresponding to the end is higher than the upper surface of the lower support plate 691. An upper push rod mechanism 692 is installed above the horizontal conveying stage 61, and a lower push rod mechanism 693 is installed below it. The push rods of the upper push rod mechanism 692 and the lower push rod mechanism 693 move toward the air consolidation mechanism. When the push rods move, they do not come into contact with the conveying surface of the horizontal conveying stage 61, that is, there is a certain gap between them, which avoids interfering with the operation of the conveying belt. The upper push rod mechanism 692 is used to drop the compacted wood blocks from the conveyor belt of the horizontal conveying stage 60 onto the entrance ends of the upper compacting plate 690 and the lower support plate 691. The lower push rod mechanism 693 then pushes the compacted wood blocks that have entered the end between the upper compacting plate 690 and the lower support plate 691 to form a compaction gap. The compressed wood blocks then advance and pressurize the wooden boards, transferring the compacted wood blocks with the sawtooth connections to the fixed-length pneumatic compacting mechanism. To ensure better alignment of the wooden board connections, it is necessary to ensure the accuracy of the end positioning. In one improved solution, eight-shaped stoppers 694 are installed on both sides of the entrance ends of the upper compacting plate 690 and the lower support pallet 691. The openings of the stoppers 694 face the conveyor belt, allowing the compacted wood to gradually move to the same position.

[0055] Based on the above technical solution, the present invention further improves the operating device in a seventh aspect, which is to carry out a ruler operation on the spliced ​​wooden boards through the pneumatic compression mechanism of the splice section after the splice section.

[0056] The ruler includes a push-down stopper mechanism 695, a cutting device 696, and a wooden board sensor 697. The wooden board sensor 697 is located on the transmission unit side of the corresponding marking position and is used to sense when the tip of the spliced ​​wooden block reaches the marking position. The lower part of the transmission unit chain protrudes from a blocking post 698 to block the tip of the spliced ​​wooden block. This blocking can also be achieved by using a pneumatic telescopic piston structure. The push-down stopper mechanism 695 is an air telescopic platen installed above the conveying unit chain. The cutting device 695 is located at the cutting position and is movable radially and vertically. 12, the downward stop mechanism includes a fixed beam 699, two downward stop mechanisms 695 installed on both sides of the fixed beam 699, and a cutting device 696 connected to the fixed beam 699. A radial slide rail 670 is installed on the fixed beam 699, and the cutting device 696 includes an air cutting saw 671, a vertically telescopic connecting mechanism 672 installed above the air cutting saw 671, and a slide rod 673 installed above the vertically telescopic connecting mechanism 672. Both ends of the slide rod 673 are engaged with the slide rail 670, and the vertically telescopic connecting mechanism 672 can drive the lower air cutting saw 671 to move up and down to adjust its position, which is used to bring the saw blade into contact with the compacted wood block during cutting and to separate the saw blade from the compacted wood block after cutting is completed. The saw blade of the air cut-off saw 671 is a circular saw blade, and a protective cover 674 is installed on the outside thereof, and the protective cover 674 is fixedly connected to a fixed beam 699 above.

[0057] The structure of the horizontal joint is basically the same as that of the vertical joint, except that the position of the application roll is on the side of the wooden board. Other processing methods can be adjusted by changing the corresponding wooden board traveling direction and joining direction based on the above technical solutions.

[0058] After the horizontal joining is complete, the compacted wood block becomes a compacted wooden board structure, which is then cut to a fixed length using a woodworking breaker, i.e., cut into compacted boards of the desired size. The woodworking breaker described in this section is similar to the cutting device described above, and both cut off the excess board material after fixing its position. The fixed length of the horizontal joining part includes fixed lengths in the horizontal and vertical directions, and in actual use, the position and angle of each mechanism of the ruler part can be adjusted based on the angle to be cut.

[0059] It should be noted that the production line of the present invention is assembled using a flexible and cost-saving assembly method. Specifically, the high-frequency device in the high-frequency hot pressing section of each production line simultaneously supplies high-frequency power to the hot pressing machines of both production lines. That is, when two production lines are installed side by side, the two production lines share the same high-frequency device in the high-frequency hot pressing sections positioned in opposite directions. See Figure 13, which realizes one-to-two, two-to-four, four-to-eight, etc., thereby saving machine costs. Furthermore, to improve the production efficiency of the production line, multiple sets of high-frequency hot pressing sections can be installed on one production line. For example, two sets of high-frequency hot pressing sections can be installed, i.e., four high-frequency hot pressing machines, the first two of which are used to simultaneously press and heat two wooden boards, and the last two are used to simultaneously harden two wooden boards. The operation method is as follows: After the first wooden board passes through the first table, it moves to the second table and simultaneously enters the first table with the second wooden board. The two machines press simultaneously, and after pressing, it enters the third and fourth machines, respectively, for hardening. In this way, each high frequency hot press machine alternates between one place and one press, which greatly improves production efficiency.

[0060] The conveying units corresponding to the above-mentioned operating devices of the present invention are equipped with conveying machinery of different types according to the actual situation, and include multiple types of conveying belts, flat or non-flat, continuous or discontinuous, and specific types include rubber, roller type, chain type, etc.

[0061] It should be noted that, based on the technical solution of the above production line of the present invention, the subsequent line can further be equipped with a transmission unit and an operating device installed in the transmission unit according to processing requirements. For example, a moisture content measuring unit can be further added, and a moisture content measuring instrument can be arranged to measure the moisture content of the wood board, and the conveying unit can further include a conveying chain installed in the moisture content measuring unit. In this way, a sanding unit can be further connected, and the sanding unit can be equipped with a conveying chain connected to the last ring conveying unit and a sanding machine for sanding the compacted wood, and the sanding machine can be a sanding machine of the prior art.

[0062] The following is a further test of the production line of the present invention using a compacted cork board block to demonstrate its effectiveness. The test below examines the effects of preheating, hot pressing, and cooling processes on the performance of the wood board product, and therefore does not involve subsequent splicing and sizing processes.

[0063] 1. Select several standard-length poplar strips (also known as cork strips) with a length of 100cm-120cm and a width of 22cm, with a moisture content of 15±3%, and divide them into two groups, with six samples in each group.

[0064] (1) The first set of test cork strips is passed through the conveyor chain mechanism of the production line and sequentially through the first infrared preheating section, the high frequency hot pressing section, and the cooling section operating devices to undergo the preheating, hot pressing, and cooling processes, each of which is operated using the following parameters: First infrared preheating section: The length of the infrared radiation passage is 15m, the temperature of the infrared radiation space is 130℃, and the first set of test cork strips is heated to an average temperature of 85±5℃ by infrared radiation. High-frequency hot pressing section: The first group of test corks were heated to an average temperature of 105±5°C by the first high-frequency wave and kept at that temperature for 6 minutes. The second group of test corks were heated to an average temperature of 205±5°C by the second high-frequency wave and kept at that temperature for 6 minutes.

[0065] Cooling section: The first set of test cork strips are cooled to an average temperature of 70-90°C on the wooden board through a liquid nitrogen cooling channel.

[0066] (2) The second set of test cork strips was passed through the conveyor chain mechanism of the production line, and the first infrared preheating section, water layer deposition section, second infrared preheating section, high-frequency hot pressing section, and cooling section were operated by the operating devices to undergo preheating, hot pressing, and cooling processes. The operating parameters of each piece of equipment were the same as those of the first set, except for the addition of the water layer deposition section and the second infrared preheating section. The water layer deposition section used two water layer coating roll devices to coat the cork strips with a water layer twice, and the second infrared preheating section had an infrared radiation path length of 5 m and an infrared radiation space temperature of 130°C. The first set of test cork strips were heated to an average temperature of 85±5°C by infrared radiation.

[0067] 2. Using the two sets of compacted wood, cut and remove a 3 mm thick surface layer (the surface layer exposed to infrared radiation) along the thickness direction to expose the inner layer, measure the density and moisture content, and then cut out a total of six test pieces: four at the four corners and two at the center.

[0068] Test piece size: length 150±1mm, width 50±0.5mm, Test method: Inspect the hairline on the sample surface with normal vision (or corrected to normal vision) and a 6x magnifying glass at an illumination of 800lx to 1000lx.

[0069] Hairline level: Level 5: no hairline, Level 4: hairline can be seen only with a 6x magnifying glass, Level: hairline can be seen with the naked eye, and the hairline of one wooden board is the arithmetic average value of all test piece hairline levels, which is approximated to an integer, and the results are shown in Table 1.

[0070] [Table 1]

[0071] As can be seen from the test results, the hairlines of the second set of samples are obviously less than those of the first set of samples. The water-layer-attached cork strips will generate hot steam during high-frequency hot pressing, which may further change the wood properties.

[0072] The above-described embodiments do not limit this technical solution, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments are included within the protection scope of the technical solution.

Claims

1. The conveyor chain mechanism and the operation devices are sequentially installed on the conveyor chain mechanism according to the wood board processing flow, and the operation devices are sequentially: A first infrared preheating unit in which an infrared radiation passage is arranged to irradiate and heat the traveling wooden board; a water layer applying section arranged to apply a water layer to the surface of the wood board preheated by the first infrared preheating section by a water sprinkling or application roll method; a second infrared preheating unit, the second infrared preheating unit being arranged so that the infrared radiation passage can perform a secondary radiation heating on the wooden board having the progressive water layer attached thereto; a high-frequency hot press unit in which a high-frequency heat pressure device is disposed to perform heat compression and hardening treatment on the preheated wood board; a cooling section in which a refrigerant cooling passage is arranged to cool the progressively compacted wood block compacted by the high frequency hot press section; an operating device connected to the electromechanical control system of each section; Each of the sections corresponding to the conveyor chain mechanism is provided with an independent conveyor unit. This automated production line for compacted timber is characterized by the following characteristics:

2. The conveying unit corresponding to the infrared preheating unit is provided below the infrared irradiation passage, and infrared lamp tubes whose power can be adjusted are uniformly provided inside the infrared irradiation passage along the direction of travel, above the infrared irradiation passage; The length of the infrared radiation path of the first infrared preheating unit is 13-15 m, and the length of the infrared radiation path of the second infrared preheating unit is 5-8 m.

2. The automated production line for compacted logs of fixed length according to claim 1.

3. Temperature detectors for detecting the temperature of the wooden board are provided at the entrance and exit ends of the infrared radiation passage, a reflector is provided on the inner wall of the infrared radiation passage to radiate the infrared radiation heat generated from the infrared lamp tube in a predetermined direction, a light-shielding plate is provided above the entrance end of the infrared radiation passage, and a cover with a cover plate is provided on one or both sides of the wall of the infrared radiation passage.

2. The automated production line for compacted logs of fixed length according to claim 1.

4. The water layer attachment section includes a plurality of water layer roll coating devices, each of which includes a downwardly opening casing arranged above a corresponding transport unit, a water injection mechanism and a coating roll component arranged in the casing, a water injection pump and a coating roll power mechanism arranged on the side of the corresponding transport unit, and a water tank arranged on the side or bottom of the corresponding transport unit; The water injection mechanism is at least one water injection pipe structure equipped with a water injection nozzle, the water injection pipe is connected to a water tank via the water injection pump, the spreader roll component includes a resin roll and a steel roll arranged in the direction of travel, the water injection nozzle is disposed above the steel roll, water flows from above the steel roll along the surface, and when the steel roll rotates, the water is guided downward through the gap between the two rolls to a wooden board with a conveying unit disposed below, the spreader roll power mechanism supplies power to the steel roll, Water guide grooves are provided below both ends of the applicator roll component, and a downwardly inclined water leakage port is provided at the bottom of one end of the water guide groove. When two water layer roll applicators are provided, the water guide grooves of the two water layer roll applicators extend toward opposite sides and approach each other, so that the water leakage ports of the two coaxial water guide grooves approach each other. A water guide pipe connected to a water tank is provided on the transport unit bracket below the water leakage port.

2. The automated production line for compacted logs of fixed length according to claim 1.

5. The high-frequency hot press unit includes two sets of high-frequency hot press devices that perform heat compression and hardening treatments on the wooden boards arranged along the front and rear of the conveyor chain, and an automatic wooden board conveying device that is arranged on the entrance side of the high-frequency hot press devices, The high-frequency hot press device compresses and heats the upper and lower platens to form a compaction. The automatic wooden board conveying device includes a moving conveying component and a mechanical pusher component. The moving conveying component includes a fixed bracket, a translation mechanism, a moving plate rack (4) conveying belt arranged above the fixed bracket, and a conveying belt power mechanism. Main and secondary slide rails are provided on both sides above the fixed bracket. Sliders that move on the secondary slide rails are provided at both ends of the moving plate rack. The translation mechanism is provided on the side of the moving plate rack and is configured to slide against the main slide rail. The bottom surface of the moving plate rack is higher than the upper surface of the lower platen. The conveying belt revolves around the moving plate rack. The conveying belt power mechanism is configured as a power mechanism for rotating the conveying belt. The mechanical pusher component includes a first baffle mechanism disposed at a front end of the moving plate rack, and a mechanical moving or rotating structure is provided for moving or returning a baffle corresponding to the first baffle mechanism from a blocking position.

2. The automated production line for compacted logs of fixed length according to claim 1.

6. a front positioning hole is provided on the front side of the lower platen, a positioning mechanism is provided corresponding to the position of the front positioning hole, the positioning mechanism is an extendable rod or a rotating rod, extendable push rod mechanisms are provided on both sides of the lower platen that extend and contract toward the middle part of the lower platen, and a positioning plate is provided at the tip of the push rod of the extendable push rod mechanism to adjust the radial displacement of and position the stacked wooden boards, The height from the bottom surface of the moving plate rack to the surface of the lower platen is higher than the stacking height of the three-ply wooden boards, the telescopic push rod mechanisms are arranged on both sides of the lower platen, and when the retractable rods are in a retracted state, the positioning plates are arranged outside the moving path of the moving plate rack and outside the orthographic projection plane of the upper platen.

6. The automated production line for compacted logs of fixed length according to claim 5.

7. The cooling unit includes a movable cooling passage arranged above the transport unit at the corresponding position, a cooling water sprinkling component arranged above the movable cooling passage, a cooling water storage tank arranged on the side of the movable cooling passage, and a control device thereof; The cooling water sprinkler component includes a transport pipe connected to the cooling water storage tank, and sprinkler pipes connected to the transport pipe and branching at an upper part of the passage and evenly arranged, and sprinkler nozzles are evenly arranged at the bottom of the sprinkler pipes; The length of the moving cooling passage is 10-15 m; 2. The automated production line for compacted logs of fixed length according to claim 1.

8. a joining section is provided after the cooling section, the joining section including a roll coating mechanism and a splice pneumatic compaction mechanism; the roll coating mechanism includes a cavity for accommodating resin slurry, an agitating rod disposed within the cavity, a coating roll, a slurry conduit, and a roll power mechanism, the slurry conduit being disposed near the surface of the coating roll, the inlet of the slurry conduit being disposed within the slurry, and the outlet of the slurry conduit being disposed above the surface of the coating roll, the slurry conduit being connected to a small liquid pump, the roll axis of the coating roll being disposed vertically, the bottom of the roll axis being connected to the roll power mechanism, a plurality of coating brushes being disposed on the surface of the coating roll, the coating brushes being used to uniformly coat the resin slurry flowing out from the outlet of the slurry conduit onto the surface of the coating roll, and a portion of the coating roll being exposed, the exposed surface facing a conveying unit; The splice pneumatic compaction mechanism includes an upper compaction plate and a lower support plate controlled and adjusted by a pneumatic mechanism, and a gap is formed between the upper compaction plate and the lower support plate for sandwiching the compacted wood block. A corresponding conveying unit is installed on the side of the lower support plate, and the conveying surface of the conveying unit is higher than the upper surface of the lower support plate. The conveying unit is installed with an upper push rod mechanism above the conveying surface connected to the front conveying belt, and a passage connecting to the lower support plate is formed below. A lower push rod mechanism is installed, and the push rods of the upper push rod mechanism and the lower push rod mechanism extend and retract toward the pneumatic compaction mechanism, and the push rods do not come into contact with the conveying unit during movement.

2. The automated production line for compacted logs of fixed length according to claim 1.

9. The joints are vertical joints and horizontal joints, and the cooled compacted wood block passes through the vertical joints and then the horizontal joints, and the vertical joints include sawtooth end cutting mechanisms; The sawtooth end cutting mechanism includes a roll bracket installed on the side of the conveying unit, a sawtooth roll installed in the roll bracket, a sawtooth roll power mechanism, and a lower positioning mechanism installed above the conveying unit, the sawtooth roll is a roll wheel structure with a sawtooth knife on its outer periphery, the sawtooth roll power mechanism provides roll cutting power to the sawtooth roll, the sawtooth roll is connected to the roll bracket via an adjustment mechanism, and the adjustment mechanism is an extension mechanism or a sliding mechanism that moves the sawtooth roll vertically or radially. The automated production line for compacted logs of fixed length according to claim 8.

10. A ruler unit is provided behind each of the joints, and the ruler unit includes a position limiting mechanism, a cutting device, and a wooden board detection device; The wooden board detection device is disposed on the conveying unit side of the corresponding marking position, and a blocking post is provided in front of the wooden board detection device, which is upright and telescopic or inverted, and the position limiting mechanism includes a fixed beam, two pressing position limiting mechanisms provided on both sides of the fixed beam, and a cutting device connected to the fixed beam, and the fixed beam is provided with radial slide rails, and the cutting device includes a pneumatic cut-off saw, a vertical telescopic connection mechanism arranged above the pneumatic cut-off saw, and a slide rod arranged above the vertical telescopic connection mechanism, both ends of the slide rod are fitted into the slide rails, and a slide power mechanism is provided for moving the slide rod, and the vertical telescopic connection mechanism can move the lower pneumatic cut-off saw up and down to adjust its position, and the saw blade of the pneumatic cut-off saw is a circular saw blade, and a protective cover is provided on the outside of the circular saw, and the protective cover is fixedly connected to the upper fixed beam. The automated production line for compacted logs of fixed length according to claim 8.

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