A method for drying density board

Abstract

The present invention provides a density board drying method applied to the field of density board drying. The density board drying method scatters hygroscopic particles evenly on the left and right sides of the density board from top to bottom, so that the hygroscopic particles are in the same relatively closed space as the density board for a long time. With the help of the efficient hygroscopic characteristics of the hygroscopic particles, the moisture contained in the density board is actively absorbed, and the efficiency of discharging moisture in the density board to the outside is effectively improved. The hygroscopic particles dropped on the bottom of the drying chamber are recovered by the extractor b into the hot air drying box for re-drying, so that the drying operation of the density board by the hygroscopic particles is cyclically performed. While ensuring the drying efficiency of the density board, the stability of the internal drying of the density board can also be effectively guaranteed, and the density board can be prevented from being damaged and cracked due to uneven drying during the drying process.

Description

Technical Field

[0001] The present application relates to the field of density board drying, and in particular to a density board drying method. Background Art

[0002] The full name of density board is density fiberboard. It is a board made of wood fiber or other plant fiber as raw materials. After fiber preparation, synthetic resin is applied, and then pressed under heating and pressure conditions. In the existing technology, density board has the advantages of uniform structure, fine material, stable performance, impact resistance, easy processing, and affordable price. It is widely used in domestic furniture, decoration, musical instruments and packaging.

[0003] When density boards are processed and produced, the moisture content in the density boards has the greatest impact on the adhesion of the coating on the surface of the density boards. Too high moisture content in the density boards will cause poor adhesion of the coating, blistering, cracking and falling off. Therefore, during the processing of density boards, its internal moisture content must be strictly controlled. Therefore, before painting, excess moisture in the density boards is usually removed by drying. In the prior art, density boards are usually dried naturally or placed in a low-temperature drying room for forced drying. The moisture in the density boards is only discharged through the flow of air, resulting in low drying efficiency of the density boards, which leads to a long processing cycle of the density boards.

[0004] Therefore, a density board drying method is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present application is to solve the problem of low drying efficiency caused by using only cold air to dry density boards in the prior art. Compared with the prior art, a density board drying method is provided. The method relates to a density board drying device, which specifically includes the following steps:

[0006] S1. Hang the density boards to be dried neatly and evenly inside the drying room so that the distance between two adjacent density boards is kept at 5 cm to 10 cm;

[0007] S2, drying the hygroscopic particles stored in the hot air drying oven, wherein the temperature in the hot air drying oven is controlled at 60°C to 80°C;

[0008] S3, the hygroscopic particles dried in the hot air drying box are continuously pumped into the discharge pipe installed above the drying chamber through the discharge pipe, and the hygroscopic particles are poured into the drying chamber through the discharge pipe, and the discharge pipe is controlled to move back and forth so that the hygroscopic particles are evenly interspersed and dropped between two adjacent density boards;

[0009] S4, recover the hygroscopic particles that fall at the bottom of the drying chamber, and draw them back into the hot air drying box through the extractor b;

[0010] S5. Repeat the operations in S2-S4 for 2-4 days until the moisture content in the density board drops to 5% to 14%.

[0011] When this method is used to dry the density board, the hygroscopic particles are evenly scattered on the left and right sides of the density board from top to bottom. The hygroscopic particles are in the same relatively closed space with the density board for a long time. With the help of the efficient hygroscopic characteristics of the hygroscopic particles, the moisture contained in the density board can be actively absorbed, and the efficiency of moisture discharge from the density board can be effectively improved. While ensuring the drying efficiency of the density board, it can also effectively ensure the stability of the internal drying of the density board, and avoid damage and cracking of the density board due to uneven drying during the drying process.

[0012] Furthermore, the density board drying device includes a drying chamber, and a transversely arranged electric slide rail is fixedly installed on the top inner end wall of the drying chamber, and a longitudinally arranged discharge pipe is fixedly connected to the sliding end of the electric slide rail, and a hot air drying box is fixedly installed on the outside of the drying chamber, and a feeder a is fixedly installed on the outer end wall of the hot air drying box, and a feed inlet of the feeder a is fixedly connected to the interior of the hot air drying box, and a telescopic hose is fixedly connected between the discharge port of the feeder a and the discharge pipe, and a feeder b is also fixedly installed on the outer end wall of the drying chamber, and the feed inlet of the feeder b is connected to the right bottom of the drying chamber, and the discharge port of the feeder b is fixedly connected to the interior of the hot air drying box.

[0013] Furthermore, both left and right sides of the bottom of the drying chamber are rotatably connected with longitudinally arranged conveying rollers, a conveying belt is movably sleeved between the two conveying rollers, and a servo motor is externally connected to one of the conveying rollers.

[0014] Furthermore, the middle positions of the two conveying rollers are both configured as an inwardly concave structure, and the conveying belt, supported by the two conveying rollers, also forms an inwardly concave structure in the middle position.

[0015] Optionally, the density board is suspended in the drying room in the form of upper, middle and lower layers, and symmetrically arranged side panels are fixedly installed on the front and rear sides of the drying room. A suspension assembly is connected to the top of the density board, and the suspension assembly includes a longitudinally arranged round rod, on which a plurality of straps tied to the density board are evenly distributed, and between the two side panels are installed upper, middle and lower conveying assemblies for suspending and conveying the suspension assembly.

[0016] Furthermore, the conveying assembly includes a fixed frame fixedly installed on the end wall of one side of the front and rear side plates close to each other, and the left and right ends of each fixed frame are rotatably connected to symmetrically arranged rollers, and the rollers are externally connected to a servo motor, and a belt is movably sleeved between the two symmetrical rollers on the left and right, and grooves a that are compatible with the outer diameter of the end of the round rod are equidistantly opened on the outer end wall of the belt, and the front and rear ends of the round rod are respectively placed in the two corresponding grooves a at the front and rear, and a through groove that is compatible with the moving trajectory of the round rod is opened on the side plate, and the end of the round rod is inserted in the through groove.

[0017] Furthermore, a transfer assembly is installed between the left ends of the middle and lower conveying assemblies, and between the right ends of the middle and upper conveying assemblies. The transfer assembly includes circular grooves symmetrically opened on the front and rear side panels, and the circular grooves are connected to two through grooves in the upper and lower directions. A turntable is rotatably installed inside the circular groove, and n (n≥2) grooves b with the same size as the groove a are equidistantly opened on the outer end wall of the turntable. A servo motor is externally connected to the turntable.

[0018] Furthermore, a limit strip is fixedly installed on the inner end wall of the circular groove away from the through groove, and the distance between the inner end wall of the limit strip and the outer end wall of the turntable is equal to the radius of the end of the round rod.

[0019] Furthermore, the time taken by groove b to rotate 180° around the turntable is equal to the time taken by groove a to move one grid.

[0020] Furthermore, a door opening is provided at the lower position of the left end wall of the drying room, the left end of the conveying assembly located below passes through the door opening and extends to the outside of the drying room, and a rolling shutter door located above the door opening is fixedly installed on the left end wall of the drying room.

[0021] Compared with the prior art, the advantages of this application are:

[0022] (1) During the implementation of this application, the hygroscopic particles are evenly scattered on the left and right sides of the density board from top to bottom. The hygroscopic particles are in the same relatively closed space with the density board for a long time. With the help of the efficient hygroscopic characteristics of the hygroscopic particles, the moisture contained in the density board can be actively absorbed, and the efficiency of moisture discharge from the density board to the outside can be effectively improved. While ensuring the drying efficiency of the density board, it can also effectively ensure the stability of the internal drying of the density board, thereby avoiding damage and cracking of the density board due to uneven drying during the drying process.

[0023] (2) By setting a conveyor roller to drive the conveyor belt to rotate, the hygroscopic particles that fall on the bottom of the drying chamber are transported to the right for concentration, and by setting the middle position of the conveyor belt to be concave inward and the front and rear sides to be tilted outward, it is beneficial to concentrate the hygroscopic particles to the middle position during the conveying process, further enhance the concentration of the hygroscopic particles during the recovery process, and help to ensure the stability of the extractor b in sucking back the hygroscopic particles.

[0024] (3) The density board is suspended by the upper, middle and lower conveying components to increase the internal height of the drying room and make full use of the upper space, which is conducive to reducing the occupation of the workshop space during the implementation of the method.

[0025] (4) By installing transfer components at the ends of the two conveying components and constructing an S-shaped conveying track, the round rods can be continuously transferred and conveyed, so that the suspension component carries the density board and moves on the upper, middle and lower conveying components, which is conducive to the continuous suspension operation of the density board and effectively improves the convenience of operation for the staff.

[0026] (5) By setting the time taken by groove a to move a unit distance to be equal to the time taken by groove b to rotate 180° around the turntable, it is prevented that when the turntable is transporting a suspension component, other suspension components enter the transport component, and it is prevented that two adjacent density boards collide during the transport process, which is conducive to ensuring the stability of the method during implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the workflow diagram of this application;

[0028] Figure 2 This is a three-dimensional diagram of the internal structure of the density board drying device of this application;

[0029] Figure 3 This is a three-dimensional diagram of the density board drying device from the front view of this application;

[0030] Figure 4 This is a three-dimensional diagram of the density board drying device from the back view of this application;

[0031] Figure 5 for Figure 3 A cross-sectional view of the structure;

[0032] Figure 6 A structural stereogram of the density board and the suspension assembly of this application;

[0033] Figure 7 This is a schematic diagram of the outer structure of the side panel of this application;

[0034] Figure 8 This is a schematic diagram of the inner structure of the side panel of this application;

[0035] Fig. 9 This is a three-dimensional diagram of the structure inside the density board drying device when the density board is hung in this application;

[0036] Fig.10 This is a cross-sectional view of a density board drying device when the density board is hung in this application.

[0037] Description of the numbers in the figure:

[0038] 1. Drying room; 101. Electric slide rail; 102. Feeding pipe; 103. Hot air drying box; 104. Feeder a; 105. Telescopic hose; 106. Feeder b; 2. Conveyor roller; 201. Conveyor belt; 3. Side panel; 4. Suspension assembly; 401. Round rod; 402. Strap; 5. Conveying assembly; 501. Fixed frame; 502. Roller; 503. Belt; 504. Groove a; 505. Through groove; 6. Transfer assembly; 601. Round groove; 602. Turntable; 603. Groove b; 604. Limit strip; 7. Door opening; 701. Rolling door. DETAILED DESCRIPTION

[0039] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0040] Embodiment 1:

[0041] The present invention provides a method for drying a density board. Figure 1 - Fig.10 The method relates to a density board drying device, which specifically comprises the following steps:

[0042] S1, the density boards to be dried are hung neatly and evenly inside the drying chamber 1, so that the distance between two adjacent density boards is kept at 8 cm;

[0043] S2, drying the hygroscopic particles stored in the hot air drying box 103, and controlling the temperature in the hot air drying box 103 at 65° C.;

[0044] S3, the hygroscopic particles dried in the hot air drying box 103 are continuously pumped into the discharge pipe 102 installed above the drying chamber 1 through the pumping machine a104, and the hygroscopic particles are poured into the drying chamber 1 through the discharge pipe 102, and the discharge pipe 102 is controlled to move back and forth so that the hygroscopic particles are evenly interspersed and dropped between two adjacent density boards;

[0045] S4, recover the hygroscopic particles dropped at the bottom of the drying chamber 1, and draw them back to the hot air drying box 103 through the extractor b106;

[0046] S5. Repeat the operations in S2-S4 for 2-4 days until the moisture content in the density board drops to 10%.

[0047] When the method is used to dry the density board, the density board is suspended in the drying chamber 1, and a cold air circulation system is also installed inside the drying chamber 1. The cold air circulation accelerates the airflow in the drying chamber 1 to achieve low-temperature forced drying of the density board. This is a commonly used technical means for wood drying in the prior art, so it will not be elaborated on here. When the cold air circulation system is in operation, the hygroscopic particles are evenly scattered from top to bottom on the left and right sides of the density board. During the movement of the hygroscopic particles, the hygroscopic particles are in the same relatively closed space with the density board for a long time. With the help of the efficient hygroscopic characteristics of the hygroscopic particles, the moisture contained in the density board can be actively absorbed, and the efficiency of moisture discharge from the density board is effectively improved. While ensuring the drying efficiency of the density board, the stability of the internal drying of the density board can also be effectively guaranteed, and the density board can be prevented from being damaged and cracked due to uneven drying during the drying process.

[0048] See also Figure 2 - Figure 5 The density board drying device includes a drying chamber 1, and a transversely arranged electric slide rail 101 is fixedly installed on the top inner end wall of the drying chamber 1, and a longitudinally arranged discharge pipe 102 is fixedly connected to the sliding end of the electric slide rail 101, and a hot air drying box 103 is fixedly installed on the outside of the drying chamber 1, and a pumping machine a104 is fixedly installed on the outer end wall of the hot air drying box 103, and the feed port of the pumping machine a104 is fixedly connected to the inside of the hot air drying box 103, and a telescopic hose 105 is fixedly connected between the discharge port of the pumping machine a104 and the discharge pipe 102, and a pumping machine b106 is also fixedly installed on the outer end wall of the drying chamber 1, and the feed port of the pumping machine b106 is connected to the right bottom of the drying chamber 1, and the discharge port of the pumping machine b106 is fixedly connected to the inside of the hot air drying box 103.

[0049] When this method is used in conjunction with relevant drying devices to dry the density board, the hygroscopic particles can be hygroscopic resin particles, which have efficient hygroscopic properties. After absorbing moisture, the absorbed moisture can be quickly removed by heating and drying, which is beneficial to their reuse. The hygroscopic particles that fall on the bottom of the drying chamber 1 are recovered by the extractor b106 and re-dried in the hot air drying box 103, so that the hygroscopic particles can circulate the drying operation of the density board, which is beneficial to ensuring the stable and continuous discharge of moisture from the density board. The hygroscopic particles will fall downward from the upper part of the hot air drying box 103 during the process of being sucked back by the extractor b106, while the extractor a104 extracts the hygroscopic particles in the hot air drying box 103 from the bottom. In this way, it can be ensured that the sucked back hygroscopic particles have sufficient time to be heated and restored to a dry state, which is beneficial to ensuring the stability of the density board drying process using this method.

[0050] See also Figure 5The left and right sides of the bottom of the drying chamber 1 are rotatably connected with longitudinally arranged conveying rollers 2, and a conveyor belt 201 is movably sleeved between the two conveying rollers 2. A servo motor is externally connected to one of the conveying rollers 2. When this method is used in conjunction with a relevant drying device to dry the density board, the servo motor is powered on and started to drive the conveying roller 2 to rotate, and then drive the conveyor belt 201 to rotate right for conveying. The hygroscopic particles scattered from top to bottom in the drying chamber 1 fall on the conveyor belt 201 and are conveyed to the right. By providing a conveying roller 2 to drive the conveyor belt 201 to rotate, the hygroscopic particles that fall on the bottom of the drying chamber 1 are conveyed to the right for concentration, which is beneficial to ensuring the stability of the suction machine b106 in sucking back the hygroscopic particles.

[0051] See also Figure 2 The middle positions of the two conveying rollers 2 are set to an inwardly concave structure. The conveyor belt 201 also forms an inwardly concave structure in the middle position under the support of the two conveying rollers 2. When this method is used in conjunction with the relevant drying device to dry the density board, the outer diameter of the middle part of the conveying roller 2 is smaller than the outer diameter of the front and rear ends. The conveyor belt 201 is supported by the conveying rollers 2, so that the middle position of the conveyor belt 201 is concave inward, and the front and rear sides are warped outward, which is beneficial to concentrate the hygroscopic particles to the middle position during the conveying process, further enhance the concentration of the hygroscopic particles in the recovery process, and facilitate the pumping machine b106 to perform a more convenient and comprehensive retraction operation on it.

[0052] Embodiment 2:

[0053] The present invention provides a density board drying device, please refer to Figure 1 - Fig.10 The density board is suspended in the drying chamber 1 in the form of upper, middle and lower layers. Symmetrically arranged side panels 3 are fixedly installed on the front and rear sides of the drying chamber 1. A suspension component 4 is connected to the top of the density board, and the suspension component 4 includes a longitudinally arranged round rod 401. A plurality of straps 402 tied to the density board are evenly distributed on the round rod 401, and an upper, middle and lower conveying component 5 for suspending and conveying the suspension component 4 is installed between the two side panels 3. When the method is used in conjunction with the relevant drying device to dry the density board, the density board is suspended by the upper, middle and lower conveying components 5, so as to increase the internal height of the drying chamber 1 and make full use of the upper space, which is beneficial to reducing the occupation of the workshop site during the implementation of the method and improving the rationality of the implementation of the method for drying the density board.

[0054] See also Figure 2 , Figure 7 and Figure 8The conveying assembly 5 includes a fixing frame 501 fixedly mounted on the end wall of the front and rear side panels 3 close to each other on one side, and the left and right ends of each fixing frame 501 are rotatably connected with symmetrically arranged rollers 502, and the rollers 502 are externally connected to a servo motor, and a belt 503 is movably sleeved between the two symmetrical rollers 502 on the left and right, and grooves a504 that are compatible with the outer diameter of the end of the round rod 401 are equidistantly opened on the outer end wall of the belt 503, and the front and rear ends of the round rod 401 are respectively placed in the two corresponding grooves a504 on the front and rear, and a through groove 505 that is compatible with the moving trajectory of the round rod 401 is opened on the side panel 3, and the end of the round rod 401 is inserted in the through groove 505.

[0055] When this method is used in conjunction with the relevant drying device to dry the density board, the servo motor is powered on to start and drive the roller 502 to rotate, which in turn drives the belt 503 movably sleeved on its outer side to rotate, and drives the groove a504 to move. When the round rod 401 is placed in the groove a504, its position can be flexibly adjusted only by rotating the servo motor. This allows the staff to evenly distribute the density board to each layer by only placing a hanging assembly 4 with the density board mounted on one end during actual operation, which effectively improves the convenience of mounting the density board on each layer in the drying chamber 1.

[0056] See also Figure 7 and Figure 8 A transfer assembly 6 is installed between the left ends of the middle and lower conveying assemblies 5, and between the right ends of the middle and upper conveying assemblies 5. The transfer assembly 6 includes a circular groove 601 symmetrically opened on the front and rear side panels 3, and the circular groove 601 is connected with two through grooves 505 in the upper and lower directions thereof. A turntable 602 is rotatably installed inside the circular groove 601, and two grooves b603 of the same size as the groove a504 are equidistantly opened on the outer end wall of the turntable 602. A servo motor is externally connected to the turntable 602.

[0057] When this method is used in conjunction with the relevant drying device to dry the density board, the servo motor is powered on to start and drive the turntable 602 to rotate. During the rotation of the turntable 602, the groove b603 opened on its outer end wall is driven to rotate and move. During this process, the round rod 401 transported to the end of the conveying component 5 is introduced into the groove b603, and is transported to the previous conveying component 5 through the rotation of the turntable 602. By installing a transfer component 6 between the ends of the two adjacent conveying components 5 above and below, an S-shaped conveying trajectory is constructed, which can realize the continuous transfer and transportation of the round rod 401, so that the suspension component 4 carries the density board to move on the upper, middle and lower conveying components 5, which is conducive to the continuous suspension operation of the density board and effectively improves the convenience of operation of the staff.

[0058] See also Figure 8A limit strip 604 is fixedly installed on the inner end wall of the circular groove 601 away from the through groove 505, and the distance between the inner end wall of the limit strip 604 and the outer end wall of the turntable 602 is equal to the radius of the end of the round rod 401. When this method is used in conjunction with the relevant drying device to dry the density board, by setting the limit strip 604 on the outside of the turntable 602, the round rod 401 can be restricted when the turntable 602 transports it, preventing the round rod 401 from falling off from the groove b603, which is beneficial to ensuring the stability of the density board during the up and down transfer process.

[0059] The time taken for groove b603 to rotate 180° around the turntable 602 is equal to the time taken for groove a504 to move one grid. When this method is used in conjunction with the relevant drying device to dry the density board, the movement of groove a504 one grid refers to the movement of groove a504 from its position to the next groove a504 position. Taking the distance between two adjacent grooves a504 as the unit distance, the time taken for groove a504 to move a unit distance is equal to the time taken for groove b603 to rotate 180° around the turntable 602. This ensures that when the turntable 602 is transporting a suspension component 4, no other suspension components 4 will enter the transport component 6, thereby avoiding collision between two adjacent density boards during transportation, which is conducive to ensuring the stability during the implementation of the method.

[0060] See also Figure 3 , Fig. 9 and Fig.10 A door opening 7 is provided at the lower position of the left end wall of the drying chamber 1, and the left end of the conveying assembly 5 located below passes through the door opening 7 and extends to the outside of the drying chamber 1. A rolling door 701 located above the door opening 7 is fixedly installed on the left end wall of the drying chamber 1. When this method is used in conjunction with the relevant drying device to dry the density board, since the left end of the side panel 3 located below extends to the outside of the drying chamber 1, the staff can carry out orderly hanging operations of the density board through this position, which is conducive to ensuring the convenience of hanging the density board. At the same time, the door opening 7 is closed by the rolling door 701, which is conducive to ensuring the relative sealing of the interior of the drying chamber 1, thereby ensuring the stability of the density board during the drying process.

[0061] This embodiment 2 refers to embodiment 1 and forms differences based on embodiment 1. Only the differences are described here.

[0062] The above are only the best implementation methods adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A density board drying method, characterized in that: The method relates to a density board drying device, and specifically comprises the following steps: S1. Hang the density boards to be dried neatly and evenly inside the drying chamber (1), so that the distance between two adjacent density boards is kept at 5 cm to 10 cm; S2, drying the hygroscopic particles stored in the hot air drying box (103), wherein the temperature in the hot air drying box (103) is controlled at 60° C. to 80° C.; S3, continuously pumping the hygroscopic particles dried in the hot air drying box (103) into a discharge pipe (102) installed above the drying chamber (1) through a pumping machine a (104), pouring the hygroscopic particles into the drying chamber (1) through the discharge pipe (102), and controlling the discharge pipe (102) to move back and forth so that the hygroscopic particles are evenly interspersed and dropped between two adjacent density boards; S4, recovering the hygroscopic particles that have fallen to the bottom of the drying chamber (1), and pumping them back into the hot air drying box (103) through the pumping machine b (106); S5, repeat the operations in S2-S4 for 2-4 days until the moisture content in the density board drops to 5%-14%; The density board drying device comprises a drying chamber (1), and a transversely arranged electric slide rail (101) is fixedly installed on the top inner end wall of the drying chamber (1), and a longitudinally arranged feed pipe (102) is fixedly connected to the sliding end of the electric slide rail (101), and a hot air drying box (103) is fixedly installed on the outer side of the drying chamber (1), and a feed extractor a (104) is fixedly installed on the outer end wall of the hot air drying box (103), and the feed inlet of the feed extractor a (104) is fixedly connected to the inside of the hot air drying box (103), and a telescopic hose (105) is fixedly connected between the discharge port of the feed extractor a (104) and the feed pipe (102), and the drying chamber (1) is fixedly connected to the outer wall of the hot air drying box (103). A material extraction machine b (106) is also fixedly mounted on the outer end wall, and a material inlet of the material extraction machine b (106) is connected to the right bottom of the drying chamber (1), and a material outlet of the material extraction machine b (106) is fixedly connected to the inside of the hot air drying box (103). Both left and right sides of the bottom of the drying chamber (1) are rotatably connected with longitudinally arranged conveying rollers (2), and a conveying belt (201) is movably sleeved between the two conveying rollers (2), one of the conveying rollers (2) is externally connected to a servo motor, and the middle positions of the two conveying rollers (2) are both arranged to be an inwardly concave structure, and the conveying belt (201) also forms an inwardly concave structure in the middle position under the support of the two conveying rollers (2).

2. A density board drying method according to claim 1, characterized in that: The density board is suspended in the drying chamber (1) in the form of upper, middle and lower layers. Side panels (3) arranged symmetrically are fixedly installed on the front and rear sides of the drying chamber (1). A suspension component (4) is connected above the density board, and the suspension component (4) comprises a longitudinally arranged round rod (401). A plurality of straps (402) tied to the density board are evenly distributed on the round rod (401). Three conveying components (5) (upper, middle and lower) for suspending and conveying the suspension component (4) are installed between the two side panels (3).

3. A density board drying method according to claim 2, characterized in that: The conveying assembly (5) comprises a fixing frame (501) fixedly mounted on the end wall of the front and rear side plates (3) close to each other on one side, the left and right ends of each fixing frame (501) are rotatably connected to rollers (502) arranged symmetrically, the rollers (502) are externally connected to a servo motor, a belt (503) is movably sleeved between the two symmetrical rollers (502) on the left and right, and grooves a (504) matching the outer diameter of the end of the round rod (401) are equidistantly formed on the outer end wall of the belt (503), the front and rear ends of the round rod (401) are respectively placed in the two corresponding grooves a (504) on the front and rear, the side plates (3) are provided with a through groove (505) matching the moving trajectory of the round rod (401), and the end of the round rod (401) is inserted into the through groove (505).

4. A density board drying method according to claim 3, characterized in that: A transfer assembly (6) is installed between the left ends of the two middle and lower conveying assemblies (5) and between the right ends of the two middle and upper conveying assemblies (5). The transfer assembly (6) includes a circular groove (601) symmetrically opened on the front and rear side plates (3), and the circular groove (601) is connected to two through grooves (505) in the upper and lower directions thereof. A turntable (602) is rotatably installed inside the circular groove (601), and n (n≥2) grooves b (603) of the same size as the groove a (504) are equidistantly opened on the outer end wall of the turntable (602). A servo motor is externally connected to the turntable (602).

5. A density board drying method according to claim 4, characterized in that: A limit strip (604) is fixedly mounted on the inner end wall of the circular groove (601) away from the through groove (505), and the distance between the inner end wall of the limit strip (604) and the outer end wall of the rotating disk (602) is equal to the radius of the end of the round rod (401).

6. A density board drying method according to claim 4, characterized in that: The time taken by the groove b (603) to rotate 180° around the turntable (602) is equal to the time taken by the groove a (504) to move one grid.

7. A density board drying method according to claim 4, characterized in that: A door opening (7) is provided at a lower position of the left end wall of the drying chamber (1); the left end of the conveying assembly (5) located below passes through the door opening (7) and extends to the outside of the drying chamber (1); and a rolling door (701) located above the door opening (7) is fixedly mounted on the left end wall of the drying chamber (1).

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