A high-frequency compaction assembly line that sequentially lays wood

Abstract

To provide a sequential wood-laying high frequency consolidation assembly line with simplified support members and sequential compression technology. The system includes an operating device and a supporting member, the operating device including a preheating section 2, a high frequency hot pressing section 3 and a water-cooled cold pressing wood laying section 4, the high frequency hot pressing section includes several high frequency hot pressing machines, the movable roller table of each high frequency hot pressing machine extends from the internal hot pressing work station to both side entrances and is exposed to the outside, adjacent movable roller tables exposed to the outside are butted together, the water-cooled cold pressing wood laying section includes several water-cooled cold pressing machines, the movable roller table of each water-cooled cold pressing machine extends from the internal pressure welding work station to both side entrances and is exposed to the outside, adjacent movable roller tables exposed to the outside are butted together, and the supporting member is a tray placed under the wooden board to support the wooden board. The flow line is used for the supporting member by the high frequency hot pressing section and the water-cooled cold pressing wood laying section to solve the problem of the thickness of the wooden board springing back.

Description

[Technical field]

[0001] The present invention relates to the field of wood board consolidation technology, and more particularly to a sequential wood-laying high-frequency consolidation assembly line. [Background technology]

[0002] Conventional high frequency technology is widely used in wood board compaction, and high frequency is ideal for softening compacted wood boards, which requires short time and low power consumption, but high frequency pressing technology requires high pressure compression of wood boards in a very short time, so that the wood boards will have serious springback when the pressure is removed. Patent document 1, filed on March 11, 2019, describes a combination production line for high frequency compacted wood. The operating equipment of the production line adopts a "sandwich-type flow structure" in which the auxiliary high frequency softening unit, the main high frequency pressing unit and the cooling unit are closely engaged with each other, and the upper and lower pressing plates sandwich the wood board, so that the wood is always kept under high pressure during the heating and cooling stage, thereby avoiding serious springback caused by the decompression of the wood. Meanwhile, the sandwiching of the upper and lower pressing plates with a perforated plate structure reduces the moisture content of compacted wood, solving the problem of springback. Patent Document 2, filed on February 18, 2020, discloses that an apparatus for evenly discharging compressed water vapor from the surface of densified wood employs a "sandwich-type flow structure" that clamps a wooden board between an upper and lower pressure plate to maintain pressure (thickness), and increases the clamping of the perforated board to reduce the moisture content of the densified wood, thereby resolving the springback problem.

[0003] In addition, the technical solutions of Patent Document 2 (filed on February 18, 2020), Patent Document 3 (filed on December 21, 2018), and Patent Document 4 (filed on March 11, 2019) all use a "sandwich-type flow structure", which maintains the pressure of the wood board during processing and solves the problem of the wood board springing back through the structure. Although the above technical solutions solve the problem of wood board springing back to a certain extent, these devices require the wood board to always maintain pressure during the operation process, so the "sandwich-type flow structure" used in the process flow is complicated in the process operations such as pressurization and heating. For example, in the high-frequency heating process, the electrodes in the upper and lower pressure plates need to be connected to each other and current needs to be applied, and in the cooling step, a cooling medium needs to be poured into the upper and lower pressure plates to lower the temperature. When the template is grasped, the upper pressure plate needs to be grasped first, which makes the supply and discharge steps complicated, which affects production efficiency and is disadvantageous to realizing industrially efficient production.

[0004] Based on the above technical problems, the applicant is committed to developing a simpler auxiliary equipment and process technology to solve the springback of wooden boards and maintain the excellent physical properties of wooden boards. The present invention provides for simplifying the traditional support members and reducing the number of compression plates, thereby simplifying the equipment and process flow and expanding the practicality of the equipment. Under the premise of simplifying the support members, the technical problem of how to use the equipment and equipment process to maintain the mechanical properties of the compacted wooden board and avoid springback is particularly important. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Chinese patent application number 201910181348.8 [Patent Document 2] Chinese patent application number 202010100409.6 [Patent Document 3] Chinese patent application number 201811573895.2 [Patent Document 4] Chinese patent application number 201910181346.9 Summary of the Invention [Problem to be solved by the invention]

[0006] The purpose of the present invention is to solve the problems existing in the prior art, and the present invention provides a sequential wood-laying high frequency consolidation assembly line with simplified support members and sequential compaction technology. [Means for solving the problem]

[0007] The present invention is realized by the following technical solutions: A sequential wood-laying high-frequency consolidation assembly line, the operating equipment including a preheating section, a high-frequency hot-pressing section and a water-cooling cold-pressing wood-laying section connected in sequence; The high frequency hot pressing unit includes several high frequency hot pressing machines, the second movable roller table of each of the high frequency hot pressing machines extends from the internal hot pressing work station toward the entrances on both sides and is exposed to the outside, and the second movable roller tables of the adjacent high frequency hot pressing machines exposed to the outside are butted against each other, The water-cooled cold pressing wood laying section includes several water-cooled cold pressing machines, the third moving roller table of each water-cooled cold pressing machine extends from the internal pressing work station toward the entrances on both sides and is exposed to the outside, and the third moving roller tables of the adjacent water-cooled cold pressing machines exposed to the outside are butted against each other, The support member includes a tray and a wooden board supported by the tray, and a shallow groove whose shape matches the shape of the wooden board is provided on the surface of the tray facing the wooden board, and when the support member is supported and moved by the second movable roller table or the third movable roller table, the thickness direction of the wooden board is not restricted by the operating device.

[0008] Preferably, the preheating section includes several preheaters, the first movable roller table of each preheater extends from an internal preheating work station toward entrances on both sides and is exposed to the outside, and the first movable roller tables exposed to the outside of adjacent preheaters are butted against each other.

[0009] Preferably, the operating device further includes a supply unit and a saturated water-cooled pressure welding unit, and the supply unit, preheating unit, high-frequency hot pressing unit, water-cooled cold pressing unit and saturated water-cooled pressure welding unit are sequentially arranged in a first straight line in a forward direction.

[0010] Preferably, the operating device further includes a first conveying stage, a second conveying stage, and an air-cooled roller table section, a curing roller table section and a discharge section, which are installed in a second straight line in the opposite direction, the first straight line and the second straight line are two parallel lines of the same length, one side of the first conveying stage is installed downstream of the saturated water-cooled pressure welding section and the other side is installed upstream of the air-cooled roller table section, and one side of the second conveying stage is installed downstream of the discharge section and the other side is installed upstream of the supply section.

[0011] Preferably, the supply section includes a wooden board supply stage, a moving roller table stage, and a wooden board pick-up mechanism; One side of the wooden board supply stage is abutted against the movable roller table stage, the wooden board supply stage is a translation roller table, and is used to transport the wooden board to the movable roller table stage side. The wooden board pick-up mechanism is installed on the top of the movable roller table stage and extends above the abutting side of the wooden board supply stage on the upstream side of the movable roller table stage, and the wooden board pick-up mechanism adopts a suction cylinder and a gas nozzle.

[0012] Preferably, the first conveying stage is installed vertically downstream of the saturated water-cooled pressure welding section of the multiple lines, and the side edge of the other end of the saturated water-cooled pressure welding section is abutted against the upstream roller table of the air-cooled roller table section, and a mechanical pusher is installed at this end to push the wooden board to the air-cooled roller table section, and the first conveying stage is a stage that moves vertically and is used to move the water-cooled wooden board vertically to one end that abuts against the air-cooled roller rail section.

[0013] Preferably, the discharge section includes a discharge movable roller table stage and a discharge pick-up mechanism, the discharge pick-up mechanism is installed on the top of the discharge movable roller table stage and extends above the movable roller table near the downstream side of the curing roller table section on the upstream side of the movable roller table stage, the downstream end of the curing roller table section abuts against the second conveying stage, and the discharge pick-up mechanism adopts a suction cylinder and a gas nozzle.

[0014] Preferably, the second conveying stage is installed vertically and one side of the second conveying stage abuts against the downstream end of the curing roller rail section and the side edge of the supply section offset from the preheating section, respectively, and a mechanical pusher is installed at the point abutting against the side of the supply section to push the tray onto the movable roller table stage of the supply section.

[0015] Preferably, several first straight lines arranged in parallel may be installed between the supply section and the first conveying stage, and the preheating section, the high frequency hot pressing section, the water-cooled cold pressing wood laying section and the saturated water-cooled pressure welding section are installed in order in each of the first straight lines.

[0016] Preferably, the high frequency hot pressing machine of the high frequency hot pressing section is an equipment with an operating pressure of 2300T, the water-cooled cold pressing machine of the water-cooled cold pressing wood laying section is an equipment with an operating pressure of 2300T, and the pressure welding machine of the saturated water-cooled pressure welding section is an equipment with an operating pressure of 60T. Effect of the Invention

[0017] Compared with the prior art, the beneficial effects of the present invention include:

[0018] 1. The sequential wood-laying high-frequency consolidation assembly line of this invention is a production mode that adopts a fully automatic and efficient assembly line. Its unique sequential compression equipment--high-frequency hot pressing unit and water-cooled cold pressing wood laying unit are combined with simple supporting members and are used on the premise that the springback of the thickness of the wood board is allowed. This solves the technical difficulties that the previous technology required the upper and lower pressing plates to be clamped and held, which resulted in complex operations during the flow process of the production line and limited adjustment of process steps, and thus greatly improves production efficiency and truly realizes large-scale, highly automated dark factory-style factory production.

[0019] 2. The assembly line of this invention can be used for consolidating logs and non-logs, which is very versatile. The timing and method of heating and pressing the high-frequency hot pressing equipment in this assembly line can be adjusted more flexibly, which greatly improves the practicality of the assembly line.

[0020] 3. The "sequential" technology of the present invention's sequential wood-resting high-frequency consolidation assembly line is as follows: the wood board is sequentially hot-pressed and consolidated by the high-frequency hot-pressing machine with the high-frequency hot-pressing section connected in series with intervals, and the wood board gradually increases the compression ratio, thereby gradually increasing the temperature and compression rate of the wood, maximizing the evaporation and discharge of moisture in the wood cell walls, increasing the density and hardness of the wood and decreasing the springback rate. After the high-frequency hot-pressing, the wood board enters the water-cooled cold-pressing wood-resting section connected in series with intervals for sequential pressurized water cooling, which does not require pressure to be maintained between the high-pressure water coolers, making the processing method more flexible.

[0021] 4. The present invention transfers the supporting member (i.e. the log board is placed in the hot pressing tray) to the assembly line, not the upper pressing plate, which makes it easy to feed and unload, simplifies the structural complexity of the pressing plate, and eliminates the step of butting the upper metal pressing plate with the heating unit or refrigeration unit of the pressing machine, thereby simplifying the operating equipment and process steps. Moreover, in terms of springback prevention effect, the wood compressed by the sequential device of the present invention, combined with the transferring supporting member of the present application and the "sequential" technology, can achieve the same or even better technical effect as the "sandwich-type transferring structure" and "conventional high frequency conditions" in the prior art. [Brief description of the drawings]

[0022] [Figure 1] 1 is a schematic diagram of the overall structure of a sequential wood-laying high-frequency consolidation assembly line according to the present invention; FIG. [Diagram 2] FIG. 2 is a structural schematic diagram of a supply unit of the present invention; [Diagram 3] FIG. 2 is a schematic diagram of the preheating section of the present invention; [Figure 4] 2 is a schematic diagram of the structure of the high-frequency hot pressing part of the present invention; [Diagram 5] FIG. 2 is a schematic diagram of the structure of the water-cooled cold pressing wood laying part of the present invention; [Figure 6] 1 is a schematic diagram of the structure of a saturated water-cooled pressure weld of the present invention; [Figure 7] 2 is a structural schematic diagram of the first conveying stage of the present invention; FIG. [Figure 8] FIG. 2 is a schematic diagram of the structure of the exhaust part of the present invention; [Figure 9] 2 is a schematic diagram of the structure of the moisture content detector of the present invention; [Figure 10] FIG. 2 is a structural schematic diagram of a support member according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The present invention will now be described in more detail with reference to the drawings.

[0024] The sequential wood-laying high frequency consolidation assembly line of the present invention includes a handling device and a support member.

[0025] The present invention is a unique sequential compression equipment designed in an assembly line, which divides a high frequency heating step completed in one go into multiple high frequency heating sub-steps with a fixed time interval and completes them sequentially, divides a compression consolidation step completed in one go into multiple compression consolidation sub-steps with a fixed time interval and completes them sequentially, or divides a rapid cooling step completed in one go into multiple rapid cooling steps operating at fixed time intervals and completes them sequentially.

[0026] In one specific example, the operating equipment includes a preheating section, a high frequency hot pressing section and a water-cooled cold pressing wood laying section, which are connected in series.

[0027] The high frequency hot pressing section includes several high frequency hot pressing machines, the second movable roller table of each of the high frequency hot pressing machines extends from an internal hot pressing work station toward entrances on both sides and is exposed to the outside, and the second movable roller tables exposed to the outside of adjacent high frequency hot pressing machines are butted against each other.

[0028] The water-cooled cold pressing wood laying section includes several water-cooled cold pressing machines, and the third movable roller table of each of the water-cooled cold pressing machines extends from the internal pressing work station toward the entrances on both sides and is exposed to the outside, and the third movable roller tables exposed to the outside of adjacent water-cooled cold pressing machines are butted against each other.

[0029] The supporting member includes a tray and a wooden board supported by the tray, and when the supporting member is supported and moved by the movable roller table, the thickness direction of the wooden board is not restricted by the operating device. Here, the fact that the thickness direction of the wooden board is not restricted by other operating devices means that, compared with the technical solution in the prior art in which the wooden board needs to be sandwiched between upper and lower pressure plates to maintain the thickness of the wooden board in a compressed state, the wooden board does not need to have an upper pressure plate added during the moving process and does not need to be constantly held down in the thickness direction.

[0030] In another example of a complete assembly line, as shown in FIG. 1, the operating equipment includes a supply section 1, a preheating section 2, a high-frequency hot pressing section 3, a water-cooled cold pressing wood laying section 4, a saturated water-cooled pressure welding section 5, a first conveying stage 6, an air-cooled roller table section 7, a curing roller table section 8, a discharge section 9 and a second conveying stage 10, which are installed in sequence according to the wood board consolidation steps of the present invention to form a complete assembly line.

[0031] In the example of FIG. 1, the technical solution for more rationally installing each operation device while ensuring the automation of the process operation is as follows: The material supply section 1, preheating section 2, high frequency hot pressing section 3, water-cooled cold pressing wood laying section 4 and saturated water-cooled pressure welding section 5 are installed in the first straight line in the forward direction, and the air-cooled roller table section 7, curing roller table section 8 and discharge section 9 are installed in the second straight line on one side of the first straight line in the reverse direction, and the first straight line and the second straight line are two parallel lines of the same length. The first conveying stage 6 is a guiding and turning device, one side of which is installed downstream of the saturated water-cooled pressure welding section 5 and the other side of which is installed upstream of the air-cooled roller table section 7. The second conveying stage 10 is another guiding and turning device, one side of which is installed downstream of the discharge section 9 and the other side of which is installed upstream of the supplying section 1.

[0032] The support member is a tray 100 that is placed under the wooden board to support the wooden board. As shown in Fig. 10, in the structure, a shallow groove 113 is provided on the surface of the tray 100 facing the wooden board, and the shape of the shallow groove 113 is adapted to the shape of the wooden board, so that the position of the wooden board can be controlled and the positional deviation of the wooden board can be prevented to some extent. A water guide groove 110 is provided along the horizontal and / or vertical directions on the surface of the shallow groove 113, and a water guide hole 114 that penetrates the entire tray 100 is provided at the position of the water guide groove 110. The pressure supported by the tray 100 is set based on the operating pressure of a pressure welding machine of an assembly line. In one example, the pressure supported by the tray 100 is converted to 2300T (ton) / 1.75 square meters, that is, kg / cm. 2 The material can be calculated based on this, for example, stainless steel, alloy steel, and the present invention is not limited thereto.

[0033] Hereinafter, each operating device will be specifically described along the flow direction of the assembly line.

[0034] 2, the supply unit 1 includes a wooden board supply stage 12, a movable roller table stage 11, and a wooden board pick-up mechanism 13. One side of the wooden board supply stage 12 abuts against the movable roller table stage 11, and the wooden board supply stage 12 is a translational roller table, which is used to transport wooden boards to the movable roller table stage 11 side. The wooden board pick-up mechanism 13 is installed on the top of the movable roller table stage 11, and extends above the abutting side of the wooden board supply stage 12 on the upstream side of the movable roller table stage 11.

[0035] In addition, the wooden board pick-up mechanism 13 can adopt a manipulator or a suction mechanism, and preferably adopts a suction mechanism, which includes a suction cylinder and a suction nozzle installed at the output end of the suction cylinder, and during operation, the suction cylinder controls the suction nozzle to suck and release the wooden board. The moving roller table stage 10 is a translation roller table, a tray 100 is placed on the translation roller table, the wooden board pick-up mechanism 13 moves above the tray 100 after grabbing the wooden board, and releases the wooden board to the tray 100, and the wooden board and the tray 100 form a support member. One side of the moving roller table stage 10 is butted against the preheating section 2, and a mechanical pusher is installed to push the support member to the preheating section 2 to perform the preheating process. In one improvement example, in order to adapt the height of the wooden board to the suction mechanism, a lifting platform is further installed under the supply work station of the wooden board supply stage 10, which is used to raise the wooden board to be sucked to an appropriate height and suck it.

[0036] In order to improve the production efficiency of wood board consolidation, the production line of the present invention adopts multiple lines installed in parallel, and as shown in Figure 1, the upstream side of the multiple lines is arranged in parallel from the moving roller table stage 10 side of the supply section 1. Each line is respectively equipped with the preheating section 2, high frequency hot pressing section 3, water-cooled cold pressing wood laying section 4 and saturated water-cooled pressure welding section 5.

[0037] The preheating section 2 in each line uses several preheaters connected in series. The preheaters can be conventional heat transfer fluid preheaters, steam preheaters or high frequency preheaters, preferably high frequency preheaters. In one improvement, the first moving roller table of the preheater extends from the internal preheating work station to both side entrances and is exposed to the outside, and the first moving roller tables exposed to the outside of the adjacent preheaters are butted against each other, and the first moving roller tables exposed to the outside provide an intermittent decompression passage for the support member during the flow process, so that the support member can better realize the decompression between the current pressurizing device and the next pressurizing device.

[0038] 3 shows a specific example, in which the preheating section 2 includes two high-frequency preheaters 201 and 202 connected in series, and the two high-frequency preheaters 201 and 202 apply a first pressure to the supporting member in turn to preheat the wooden board on the supporting member by high-frequency waves, and then transport the supporting member to the high-frequency hot pressing section 3, and the supporting member releases the first pressure within a first time after either of the high-frequency preheaters 201 and 202 stops applying pressure. The first time is set to the time when the current preheating equipment unit stops applying pressure (providing a compression ratio) and the time when the next equipment unit starts applying pressure (providing a compression ratio). Preferably, the first time is 5-20 seconds.

[0039] The high frequency hot pressing unit 3 in each line adopts a plurality of high frequency hot pressing machines connected in series, the second moving roller table of each high frequency hot pressing machine extends from the internal hot pressing work station toward both side entrances and is exposed to the outside, and the second moving roller table exposed to the outside of the adjacent high frequency hot pressing machines butts against each other. The heating temperature and working pressure parameters in each high frequency hot pressing machine are determined according to the compression ratio of the wood board in the corresponding hot pressing machine, and the compression ratio of the wood board realized by the multiple high frequency hot pressing machines from the upstream side to the downstream side increases stepwise. The number of the high frequency hot pressing machines is set according to the actual situation, and in one example, as shown in Figure 4, it is preferably three, and the working temperature (heating temperature applied to the wood board during operation) of the three high frequency hot pressing machines 301, 302, 303 from the upstream side to the downstream side increases stepwise, and the working pressure of the three high frequency hot pressing machines 301, 302, 303 is the same. The three high frequency hot pressing machines 301, 302, 303 apply the second pressure to the supporting member in sequence to heat the wooden board on the supporting member by high frequency, and then transport it to the water-cooled cold pressing wood laying section 4, and the supporting member releases the second pressure within a second time after any of the high frequency hot pressing machines 301, 302, 303 stops applying pressure. The first time is set to the time when the current hot pressing equipment unit stops applying pressure (compression ratio supply) and the time when the next equipment unit starts applying pressure (compression ratio supply). Preferably, the second time is 10-30 seconds. The operating temperature of the first high frequency hot pressing machine 301 is 200°C, the operating temperature of the second high frequency hot pressing machine 302 is 250°C, and the operating temperature of the third high frequency hot pressing machine 303 is 300°C, and the operating pressure of each of the three high frequency hot pressing machines 301, 302, 303 is 2300T (tons). The operating parameters of each high frequency hot pressing machine are set to realize the sequential compression of the wooden board.

[0040] The key points of the sequential technique of the present invention are as follows: In the prior art, each equipment unit is tightly engaged, and upper and lower positioning rollers are installed to maintain pressure and engage to connect the pressure during the wooden board movement process. On the other hand, the equipment units of the present invention are provided with butting roller tables exposed to the outside, and there is no need to install positioning rollers at the intervals. After the previous equipment stops applying pressure, the wood pulp cellulose in the wooden board is allowed to perform an appropriate amount of springback, and then the next pressure is applied. Through the sequential operation of repeating multiple pressure and depressurization in the high frequency hot pressing section, the wood pulp cellulose in the template is allowed to destroy its wood pulp cellulose structure multiple times, thereby achieving the effect of weakening its recovery ability (i.e., springback).

[0041] The main chemical components of wood are cellulose, hemicellulose and lignin (three celluloses). If the cellulose, hemicellulose and lignin in the compressed wood form a large amount of hydrogen bonds, the compressed wood is less resilient than the original wood. In the sequential wood-resting high-frequency consolidation flow line of the present invention, since it includes multiple high-frequency heating sub-steps, multiple compression consolidation sub-steps and / or multiple rapid cooling steps, the cellulose molecules, hemicellulose molecules and lignin molecules can be woven and stretched multiple times, and more hydrogen bonds can be formed with each other. In addition, the microstructure of the three celluloses is more tightly woven, and can better lock water molecules, so that when the high-frequency compressed wood absorbs moisture, it can better resist the destruction of the hydrogen bonds caused by moisture, and achieve the technical effect of avoiding the rebound problem of wood without the need for an upper compression plate.

[0042] On the other hand, the sequential compression technology of the present invention uses a high frequency hot pressing machine with high frequency hot pressing units connected in series at intervals to sequentially compress the wood board, so that the compression ratio of the wood board increases step by step, and the temperature and compression rate of the wood gradually increase, maximizing the evaporation and discharge of moisture in the wood cell walls, increasing the wood density and hardness and decreasing the springback rate. Moreover, the support member eliminates the clamping restriction of the upper pressing plate, providing conditions for flexible adjustment of the hot pressing process, for example, the high frequency hot pressing machine can be heated or not heated simultaneously with high frequency pressing according to the process requirements.

[0043] The high frequency preheating machine of the preheating section 2 and the high frequency hot pressing machine of the high frequency hot pressing section 3 each have a pressure welding mechanism and a heating mechanism, the pressure welding mechanism includes an upper template and a lower template installed at the preheating working station and the hot pressing working station, the pressure welding mechanism and the heating mechanism of the hot pressing machine are conventional means in this field, so detailed description of the drawings is omitted. For the specific structure, reference can be made to the relevant technical solution disclosed in the applicant's previous patent application No. 201811592197.7.

[0044] The water-cooled cold pressing wood laying section 4 in each line adopts several water-cooled cold pressing machines, the third moving roller table of each water-cooled cold pressing machine extends from the internal pressure welding work station to both side entrances and is exposed to the outside, the third moving roller table exposed to the outside of the adjacent water-cooled cold pressing machines is butted against each other, and similarly, the pressure is intermittently reduced on the third moving roller table exposed to the outside where the wooden boards are butted against each other. The heating temperature and operating pressure parameters in each water-cooled cold pressing machine are determined according to the compression ratio of the wooden boards in the corresponding water-cooled cold pressing machine, and the compression ratio of the wooden boards realized by the multiple water-cooled cold pressing machines from the upstream side to the downstream side increases step by step. The high frequency pressure welding work station of each water-cooled cold pressing machine in this work step is equipped with a low-temperature water cooling device to cool the supporting member. 5 adopts four water-cooled cold pressing machines 401, 402, 403, 404, low-temperature water cooling equipment is installed corresponding to the four water-cooled cold pressing machines 401, 402, 403, 404, the operating pressure of the four water-cooled cold pressing machines 401, 402, 403, 404 is the same, and the operating pressure of the three high-frequency hot pressing machines 301, 302, 303 is the same. In one preferred embodiment, the operating pressure of the four water-cooled cold pressing machines 401, 402, 403, 404 is 2300T (tons).

[0045] The saturated water-cooled pressure welding section 5 in each line is connected in series with several water-cooled pressure welding machines, and the water-cooled pressure welding machines may be water-cooled machines commonly used in the field. Figure 6 shows a specific example, in which the saturated water-cooled pressure welding section 5 is connected in series with eight water-cooled pressure welding machines, the same crimping power source is externally connected to adjacent water-cooled pressure welding machines, and each of the four water-cooled pressure welding machines uses the same water-cooler to supply water. In one preferred technical solution, the operating pressure of the eight water-cooled pressure welding machines is 60T (tons).

[0046] In the example of FIG. 6, the saturated water-cooled pressure welding section 5 has a pressure welding mechanism and a water cooler, and the technical means of the pressure welding mechanism and the water cooler are conventional means in this field, so detailed drawing description is omitted.

[0047] As shown in Fig. 7, the first conveying stage 6 is installed on the downstream side of the saturated water-cooled butt-welding parts 5 in a plurality of lines in the vertical direction. Also, the upstream roller table of the air-cooled roller table part 7 abuts against the side of the other end of the saturated water-cooled butt-welding part 5, and a mechanical pusher is installed at this end to push the wooden board onto the air-cooled roller table part 7. The first conveying stage 6 is a vertically moving stage and is used to move vertically at one end that abuts the air-cooled wooden board against the air-cooled roller rail part 7.

[0048] The air-cooled roller table part 7 is composed of an air-cooling mechanism connected in series and attached to a plurality of air-cooled moving roller tables, preferably 10 units.

[0049] As shown in Fig. 8, the discharging part 9 includes a discharging moving roller table stage 90 and a discharging pickup mechanism. The discharging pickup mechanism is installed on the top of the discharging moving roller table stage 90 and extends above the moving roller table near the downstream side of the curing roller table part 8 on the upstream side of the moving roller table stage. The discharging pickup mechanism can adopt a manipulator or an adsorption mechanism, and the specific structure of the adsorption mechanism is as described above. The end of the downstream side of the curing roller rail part 8 abuts against the second conveying stage 10 and is used to convey the tray after discharging to the upstream side of the production line.

[0050] The second conveying stage 10 is installed in the vertical direction, and one side of it abuts against the end of the downstream side of the curing roller table part 8 and the side that is offset from the preheating part 2 of the supply part 1 respectively. A mechanical pusher is installed at the location where it abuts against the side of the supply part 1 to push the tray onto the moving roller table stage of the supply part 1 and is used to wait for the supply of the wooden board in the next cycle.

[0051] All the moving roller tables of each part in the entire production flow work line are conveyed in the way of conveying rollers.

[0052] According to the above-mentioned flow line equipment, the first time interval between each of the high frequency preheaters in the preheating section is 5-10 seconds by the roller table exposed to the outside, the second time interval between each of the high frequency hot pressing machines in the high frequency hot pressing section is 20-30 seconds, and the second time interval between each of the water-cooled cold pressing machines in the water-cooled cold pressing wood laying section is 20-30 seconds. The high frequency hot pressing section includes three high frequency hot pressing machines, each hot pressing interval time is equal, and the temperature and compression rate of the wood board are progressive, and the present invention does not specifically limit the range of progression of the temperature and compression rate. The water-cooled cold pressing wood laying section includes four water-cooled cold pressing machines, each cold pressing interval time is equal, and the compression rate of the wood board is progressive. During the compression process of the wooden boards in the above-mentioned equipment, the compression ratio is increased stepwise to realize a gradual increase in the temperature and compression rate of the wood, and the moisture in the wood cell walls can be evaporated and discharged to the maximum extent without the clamping of the upper compression plate, thereby preventing springback.

[0053] The present invention's production line is not rotated by the upper pressing plate but by the support member (i.e., the raw wood board is placed in the hot pressing tray). The advantage of this design is that it is easy to feed and discharge, while simplifying the structural complexity of the pressing plate, and there is no need to butt against the heating unit or refrigeration unit of the pressing machine. Because there is no upper pressing plate, based on the general understanding of the prior art over many years, it is not possible to "hold pressure" between the equipment units (the upper surface of the wood board cannot pass directly through the "conveyor group"), which is disadvantageous in preventing springback. Surprisingly, even if there is no upper pressing plate, due to the sequential equipment compaction step of the present invention, in terms of the rebound prevention effect, the present invention's rotating support member can be combined with the "sequential" compaction technology to achieve the same or even better technical effect as the "sandwich-type rotating structure" in the prior art (wood board sandwiched between the upper and lower pressing plates, the hot pressing tray corresponds to the upper and lower pressing plates) and the "traditional high frequency condition" in the prior art.

[0054] In addition, since the "hot-pressing tray flow structure" of the present invention is not limited to the upper pressing plate, its production adaptability is wider and it can be applied to various kinds of wood such as logs, e.g. poplar, birch, etc., and can also be applied to non-logs.

[0055] In the sequential compaction technique of the present invention, the compression ratio of each stage of the wooden board is strictly limited, so that a thickness measuring sensor is installed at each equipment unit of the preheating section, the high frequency hot pressing section and the water-cooled cold pressing wood laying section to measure the thickness of the wooden board. In addition, it is also important to measure the thickness of the wooden board before preheating. In some improved examples, as shown in FIG. 9, a moisture content measuring section 80 is further installed upstream of the supply section of the flow line, which is for installing a moisture content measuring device to test the moisture content of the wood and installing a thickness measuring sensor to measure the thickness of the template. The moisture content testing section 80 is a roller conveying stage module and a measuring device installed in the roller conveying stage module, and the roller conveying stage module includes a test stage 82, a sorting stage 83, an output stage 84 for NG products and an output stage 85 for OK products.

[0056] The test stage 82 is a vertical roller conveyor, which is installed on the upstream side of the sorting stage 83, and a microwave moisture content meter antenna 86, a thickness measuring sensor 87, and a width measuring encoder 88 are attached to the roll side of the test stage 82 via measuring brackets. The sorting section 83 is a horizontal roller conveyor, and the output stage 84 of NG products and the output stage 85 of OK products are both vertical roller conveyors, and the downstream side of the sorting stage 83 is connected to a preheating section. A length measuring encoder 89 is attached to the end of the sorting stage 83 corresponding to the upstream of the test stage 82, and is used to measure the length of the passed wood. An elevation type pinch roller is further installed at the upstream end of the sorting stage 83, and is used to pinch the wooden boards upstream of the sorting stage 83 to the midstream. An output stage 84 for the NG products is installed on the midstream side of the sorting stage 83, and an output stage 85 for the OK products is installed on the downstream side of the sorting stage 83. A lifting pusher is installed at a position corresponding to the output stage 84 for the NG products and the output stage 85 for the OK products in the sorting stage 83, and is used to push wooden boards of a corresponding quality to the corresponding output stage.

[0057] The measurement flow of the moisture content measuring unit 80 includes the steps of: 1. measuring the moisture content; 2. measuring the thickness with a thickness measuring sensor; 3. measuring the width using a width measuring encoder as the product passes the thickness measuring sensor; 4. measuring the length at the position of the liftable pinch roller; 5. calculating the moisture content using the numerical values ​​from steps 2-4; and 6. classifying the product into NG and OK products based on the moisture content value.

[0058] It is necessary to add that the "high frequency consolidation method" of this invention is a wood reinforcement treatment method that uses high frequency voltage to heat wood, compresses and consolidates the wood as a whole at a certain compression ratio, and rapidly cools the wood under certain low temperature conditions, and the wood after compression and reinforcement is called high frequency consolidation wood. The "high frequency consolidation method" heats and treats wood with a high frequency medium heating device (applies high frequency voltage), compresses and consolidates the wood as a whole with a hydraulic press (applies compression ratio), and rapidly cools the wood with a cooling device (supplies a temperature medium such as water) (natural cooling using air as a temperature medium is also possible). In this flow line equipment structure, the steps of heating, consolidation, and cooling can be performed simultaneously or separately according to the situation. When the high frequency heating step and the compression compaction step are performed simultaneously, the same high frequency medium hot pressing machine can be used to perform the work; when the high frequency heating step and the compression compaction step are not performed simultaneously, the compression compaction step can be performed independently by a cold pressing machine; when the compression compaction step and the rapid cooling step are performed simultaneously, the same water-cooled cold pressing machine can be used to perform the work; when the compression compaction step and the rapid cooling step are not performed simultaneously, the rapid cooling step can be performed independently by a water cooling device. Here, the high frequency heating step includes heating softening, heating temperature increase or heating hardening, etc., and is determined according to the specific high frequency compaction process of wood. Softening is generally for increasing the plasticity of wood, and hardening and rapid cooling (quenching) are generally for increasing the physical properties of high frequency compacted wood.

[0059] In the technical solution of the above-mentioned sequential construction based on the assembly line, the third aspect of the present invention discloses a sequential wood-laying high-frequency consolidation method, which includes at least: In the high frequency hot pressing process, the supporting member after preheating enters into several hot pressing machines in sequence to carry out multiple hot pressings, and the compression ratio of the wooden board after hot pressing of each hot pressing machine increases step by step according to the hot pressing sequence, and the second time from the end of hot pressing of the previous hot pressing machine to the start of hot pressing of the next hot pressing machine is 20-30 seconds; In the water-cooled cold pressing wood resting process, the supporting member after hot pressing process enters into several water-cooled cold pressing machines in sequence to undergo multiple water-cooled cold pressing processes, the temperature of the wooden board after cold pressing of each water-cooled cold pressing machine is gradually decreased according to the cold pressing sequence, the compression rate of the wooden board after cold pressing of each water-cooled cold pressing machine is gradually increased according to the water-cooled cold pressing sequence, and the interval between the end of cold pressing of the previous water-cooled cold pressing machine and the start of cold pressing of the next water-cooled cold pressing machine for the supporting member is 20-30 seconds.

[0060] In one improvement, a preheating process is further included before the high-frequency hot pressing step, the support member enters several preheaters in sequence to be preheated multiple times, and the first time from the end of preheating in the previous preheater to the start of preheating in the next preheater is 5 to 20 seconds.

[0061] In one refinement, the wood board is subjected to a water-cooled cold pressing wood aging treatment, followed by a saturated water-cooled pressing, air cooling and curing step.

[0062] In addition, the compression ratio of the present invention refers to the percentage of the raw wood after compression processing, i.e., compression ratio = (thickness of raw wood - thickness of wood after compression) / thickness of raw wood x 100%, and the raw wood subject to the compression ratio in this application is based on the raw wood cut before preheating processing. The compression ratio of the present invention refers to the percentage of the raw wood after compression processing, i.e., compression ratio = (thickness of raw wood - thickness of wood after compression) / thickness of raw wood, and the raw wood subject to the compression ratio in this application is based on the raw wood cut before preheating processing.

[0063] The above technical solutions are only one embodiment of the present invention. Those skilled in the art can easily make various improvements or modifications based on the disclosure of the principles of the present invention. The present invention is not limited to the technical solutions described in the above specific examples. Therefore, the above descriptions are preferred and not limiting.

Claims

1. The operating device includes an operating device and a supporting member, the operating device including a preheating unit, a high-frequency hot pressing unit, and a water-cooled cold pressing wood laying unit connected in sequence; The high frequency hot pressing unit includes several high frequency hot pressing machines, the second movable roller table of each of the high frequency hot pressing machines extends from an internal hot pressing work station toward both side entrances and is exposed to the outside, and the second movable roller tables of the adjacent high frequency hot pressing machines exposed to the outside are butted against each other, The water-cooled cold pressing wood laying section includes several water-cooled cold pressing machines, the third moving roller table of each water-cooled cold pressing machine extends from the internal pressing work station toward the entrances on both sides and is exposed to the outside, and the third moving roller tables of the adjacent water-cooled cold pressing machines exposed to the outside are butted against each other, The support member includes a tray and a wooden board supported by the tray, and a shallow groove is provided on a surface of the tray facing the wooden board, the shape of the shallow groove being adapted to the shape of the wooden board. When the support member is supported and moved by the second movable roller table or the third movable roller table, the thickness direction of the wooden board is not restricted by the operating device. This is a sequential wood-laying type high-frequency consolidation assembly line.

2. The preheating section includes several preheaters, and the first movable roller table of each preheater extends from an internal preheating work station toward both side entrances and is exposed to the outside, and the first movable roller tables of adjacent preheaters exposed to the outside are butted against each other.

2. The sequential wood-laying radio frequency consolidation assembly line of claim 1.

3. The operating device further includes a supply section and a saturated water-cooled pressure welding section, and the supply section, preheating section, high-frequency hot pressing section, water-cooled cold pressing section and saturated water-cooled pressure welding section are sequentially arranged in a first straight line in a forward direction.

2. The sequential wood-laying radio frequency consolidation assembly line of claim 1.

4. The operating device further includes a first conveying stage, a second conveying stage, and an air-cooling roller table unit, a curing roller table unit, and a discharge unit, which are arranged in a second straight line in the reverse direction; The first straight line and the second straight line are two parallel lines having the same length, one side of the first conveying stage is installed downstream of the saturated water-cooled pressure welding section and the other side is installed upstream of the air-cooled roller table section, and one side of the second conveying stage is installed downstream of the discharge section and the other side is installed upstream of the supply section.

4. The sequential wood-laying radio frequency consolidation assembly line of claim 3.

5. The supply unit includes a wooden board supply stage, a moving roller table stage, and a wooden board pick-up mechanism; One side of the wooden board supply stage is abutted against the moving roller table stage, the wooden board supply stage is a translation roller table, and is used to transport the wooden board to the moving roller table stage side. The wooden board pick-up mechanism is installed on the top of the moving roller table stage and extends above the abutting side of the wooden board supply stage on the upstream side of the moving roller table stage, and the wooden board pick-up mechanism adopts a suction cylinder and a gas nozzle.

4. The sequential wood-laying radio frequency consolidation assembly line of claim 3.

6. The first conveying stage is installed in the vertical direction downstream of the saturated water-cooled pressure welding section of the multiple lines, and the side of the other end of the saturated water-cooled pressure welding section is abutted against the upstream roller table of the air-cooled roller table section, and a mechanical pusher is installed at this end to push the wooden board to the air-cooled roller table section. The first conveying stage is a stage that moves vertically and is used to move the water-cooled wooden board vertically to one end that abuts against the air-cooled roller rail section.

5. The sequential wood-laying radio frequency consolidation assembly line of claim 4.

7. The discharge section includes a discharge movable roller table stage and a discharge pick-up mechanism, the discharge pick-up mechanism is installed on the top of the discharge movable roller table stage and extends above the movable roller table near the downstream side of the curing roller table section on the upstream side of the movable roller table stage, the downstream end of the curing roller table section abuts against the second conveying stage, and the discharge pick-up mechanism adopts a suction cylinder and a gas nozzle.

5. The sequential wood-laying radio frequency consolidation assembly line of claim 4.

8. The second conveying stage is installed vertically, and one side of the second conveying stage abuts against the downstream end of the curing roller rail section and the side of the supply section that is offset from the preheating section, respectively, and a mechanical pusher is installed at the point where the second conveying stage abuts against the side of the supply section to push the tray onto the movable roller table stage of the supply section.

5. The sequential wood-laying radio frequency consolidation assembly line of claim 4.

9. A number of first straight lines arranged in parallel may be installed between the supply section and the first conveying stage, and the preheating section, the high frequency hot pressing section, the water-cooled cold pressing wood laying section, and the saturated water-cooled pressure welding section are installed in order on each of the first straight lines.

5. The sequential wood-laying radio frequency consolidation assembly line of claim 4.

10. The high frequency hot compression machine of the high frequency hot compression bonding section is an equipment with an operating pressure of 2300T, the water-cooled cold compression machine of the water-cooled cold compression wood laying section is an equipment with an operating pressure of 2300T, and the pressure welding machine of the saturated water-cooled pressure welding section is an equipment with an operating pressure of 60T.

4. The sequential wood-laying radio frequency consolidation assembly line of claim 3.

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