Slab processing equipment

Abstract

The invention discloses slab processing equipment. The slab processing equipment comprises a preheating device and a compression roller device, the preheating device is configured to perform heat treatment on the plate blank; and the compression roller device is arranged at an outlet of the preheating device and is configured to compress the plate blank output from the preheating device. By additionally arranging the compression roller device at the rear end of the preheating device, the compression roller device can compress the heated plate blank, so that the thickness of the plate blank is reduced, the density of the plate blank is improved, the internal bonding strength of the plate blank is improved, meanwhile, the internal quality of the plate blank is improved, and therefore sufficient technological conditions are created for the subsequent technological processes such as high-speed hot pressing of the plate blank.

Description

Technical Field

[0001] An embodiment of the present disclosure relates to a slab processing device. Background Art

[0002] The production process of medium density fiberboard (MDF), such as ultra-thin fiberboard, is an important technology in the field of wood fiberboard manufacturing. The finished boards can be used to make furniture, etc. The production process of the board mainly includes feeding, laying, heating and pressing, and different preparation processes have an important impact on the quality of the finished board. Summary of the invention

[0003] At least one embodiment of the present disclosure provides a slab processing equipment, which includes a preheating device and a pressing roller device; the preheating device is configured to perform heat treatment on the slab; the pressing roller device is arranged at the outlet of the preheating device and is configured to compress the slab output from the preheating device.

[0004] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the preheating device is configured to perform heat treatment on the slab, including: the preheating device is configured to perform wet heat treatment on the slab using a mixture of steam and hot air.

[0005] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the preheating device includes a preheating plate assembly and a hot plate assembly; the preheating plate assembly includes at least one preheating plate, configured to preheat the slab, and the hot plate assembly is arranged downstream of the preheating plate assembly, includes at least one hot plate and at least one heat pipe for conveying the mixture, configured to perform wet heat treatment on the slab.

[0006] For example, in the slab processing equipment provided by at least one embodiment of the present disclosure, the hot plate assembly includes: a first hot plate and a second hot plate arranged opposite to each other, a first heat pipe and a second heat pipe; the first heat pipe is arranged on a side of the first hot plate away from the second hot plate, and is configured to blow air toward the first hot plate, and the second heat pipe is arranged on a side of the second hot plate away from the first hot plate, and is configured to draw air in a direction away from the second hot plate, wherein a slab conveying device is arranged between the first hot plate and the second hot plate, and is configured to convey the slab.

[0007] For example, in the slab processing equipment provided by at least one embodiment of the present disclosure, there are multiple hot plate assemblies, and on the same side of the slab conveying device, the first heat pipes and the second heat pipes of the multiple hot plate assemblies are arranged alternately.

[0008] For example, the slab processing equipment provided by at least one embodiment of the present disclosure further includes: a press device, which is arranged downstream of the pressing roller device and is configured to press the slab output from the pressing roller device.

[0009] For example, the slab processing equipment provided by at least one embodiment of the present disclosure further includes: a pre-pressing device, which is arranged upstream of the preheating device and is configured to perform pre-pressing treatment on the slab.

[0010] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the pressing roller device has a first compression speed for the slab, and the pre-pressing device has a second compression speed for the slab, and the first compression speed is greater than the second compression speed.

[0011] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the pressing roller device includes a frame and a first pressing roller and a second pressing roller; the first pressing roller and the second pressing roller are arranged on the frame, wherein at least one of the first pressing roller and the second pressing roller is movable to adjust the gap between the first pressing roller and the second pressing roller.

[0012] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the first pressing roller includes a first roller, the second pressing roller includes a second roller, and the diameter of the first roller and / or the second roller is 500mm-800mm.

[0013] For example, in the slab processing equipment provided by at least one embodiment of the present disclosure, the pressure roller device also includes a first lifting device, a mounting plate and a slide rail; the first lifting device is arranged on the frame, including a first lifting end; the mounting plate is connected to the first lifting end, wherein the first pressure roller is connected to the mounting plate; the slide rail is arranged on the frame, wherein the mounting plate is slidably connected to the slide rail.

[0014] For example, in the slab processing equipment provided by at least one embodiment of the present disclosure, the first lifting device includes a displacement sensor, and the displacement sensor is configured to detect the lifting distance of the first lifting end.

[0015] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the pressing roller device also includes: a limiting device, which is arranged on the side of the slide rail close to the second pressing roller and is configured to limit the minimum gap between the first roller and the second roller.

[0016] For example, in the slab processing equipment provided in at least one embodiment of the present disclosure, the pressing roller device also includes: a first pressing roller limit monitoring device, which is arranged on the side of the first pressing roller away from the second pressing roller and is configured to monitor the displacement of the first pressing roller on the side away from the second pressing roller.

[0017] For example, in the slab processing equipment provided by at least one embodiment of the present disclosure, the pressure roller device also includes a first reducer fixing frame, a first reducer and a second lifting device; the first reducer fixing frame is arranged on the mounting plate; the first reducer is arranged on the first reducer fixing frame and is configured to be connected to the first pressure roller; the second lifting device is arranged on the frame and includes a second lifting end, wherein the first reducer fixing frame is connected to the second lifting end.

[0018] For example, the slab processing equipment provided in at least one embodiment of the present disclosure also includes an encoder and a controller; the encoder is configured to obtain the rotational speed of the first pressure roller; and the controller is configured to adjust the rotational speed of the first reducer according to the rotational speed of the first pressure roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0020] Figure 1 A partial structural schematic diagram of a slab processing device provided in at least one embodiment of the present disclosure;

[0021] Figure 2 A schematic structural diagram of a preheating device for a slab processing device provided in at least one embodiment of the present disclosure;

[0022] Figure 3 A schematic structural diagram of a preheating plate assembly and a hot plate assembly of a preheating device for a slab processing device provided in at least one embodiment of the present disclosure;

[0023] Figure 4 A schematic diagram of another part of the structure of the slab processing equipment provided by at least one embodiment of the present disclosure;

[0024] Figure 5 A three-dimensional schematic diagram of a pressing roller device of a slab processing equipment provided by at least one embodiment of the present disclosure;

[0025] Figure 6 A schematic structural diagram of a first pressing roller of a pressing roller device of a slab processing equipment provided in at least one embodiment of the present disclosure;

[0026] Figure 7 A schematic structural diagram of a second pressing roller of a pressing roller device of a slab processing equipment provided in at least one embodiment of the present disclosure; and

[0027] Figure 8 A schematic diagram of another portion of the structure of the slab processing equipment provided in at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] In the MDF production process, the slab is usually preheated before entering the continuous press / flat press to preheat the slab, increase the temperature of the slab, increase the hot pressing efficiency of the subsequent continuous press / flat press, and thus improve the production efficiency and production quality of the slab.

[0031] The inventors of the present disclosure have discovered that conventional preheating devices can preheat the slabs, increase the temperature of the slabs, and increase the hot pressing efficiency of subsequent continuous presses / flat presses, but these devices still have some shortcomings. For example, they cannot effectively solve the problems of microscopic defects inside the slabs (such as fiber balls or rubber blocks) and slab thickness, resulting in room for improvement in the quality and output of the panels.

[0032] At least one embodiment of the present disclosure provides a slab processing equipment, which includes a preheating device and a pressing roller device; the preheating device is configured to perform heat treatment on the slab; the pressing roller device is arranged at the outlet of the preheating device and is configured to compress the slab output from the preheating device.

[0033] In the embodiments of the present disclosure, by adding a pressing roller device at the rear end of the preheating device, that is, adding a pressing roller device at the outlet of the preheating device, the slab is compressed by the pressing roller device, which can further reduce the thickness of the slab, increase the density of the slab, and increase the internal bonding strength of the slab. At the same time, the intrinsic quality of the slab (such as crushing intrinsic defects such as fiber balls or rubber blocks) is improved, thereby creating sufficient process conditions for subsequent high-speed hot pressing and other process flows of the slab, avoiding damage to the steel belt of the subsequent continuous press / flat press (this effect is very important for the production of ultra-thin plates), improving the safety and production efficiency of the subsequent continuous press / flat press operation, and improving the quality of the finished product.

[0034] The slab processing equipment provided by the embodiments of the present disclosure is described below through several specific embodiments.

[0035] At least one embodiment of the present disclosure provides a slab processing device, Figure 1 FIG. 2 shows a partial structural schematic diagram of the slab processing equipment. Figure 1 As shown, the slab processing equipment includes a preheating device 10 and a pressing roller device 20; the preheating device 10 is configured to perform heat treatment on the slab; the pressing roller device 20 is arranged at the outlet of the preheating device 10 and is configured to compress the slab output from the preheating device 10.

[0036] In the embodiment of the present disclosure, the pressing roller device 20 is arranged at the outlet of the preheating device 10 and can directly compress the slab output by the preheating device 10. There is no other device for processing the slab between the preheating device 10 and the pressing roller device 20.

[0037] For example, in some embodiments, the preheating device 10 is configured to perform a wet heat treatment on the slab using a mixture of steam and hot air, so that the slab has good thermoplasticity.

[0038] For example, Figure 2 The schematic diagram of the structure of the preheating device is shown in FIG. Figure 2 As shown, in some embodiments, the preheating device 10 includes a preheating plate assembly 11 and a hot plate assembly, and three hot plate assemblies 12 - 14 are shown in the figure as examples.

[0039] For example, Figure 3 The schematic diagram of the structure of the preheating plate assembly and the hot plate assembly is shown, combining 2 and Figure 3The preheating plate assembly 11 includes at least one preheating plate, for example, two preheating plates 11A and 11B, which are respectively arranged on opposite sides of the slab conveying device 15 and configured to preheat the slabs transported on the slab conveying device 15. For example, the slab conveying device 15 can be a conveying structure such as a conveyor belt, and the two preheating plates 11A and 11B are respectively arranged on opposite sides of the slab conveying device 15 so that the two preheating plates 11A and 11B can preheat the slabs at the upper and lower sides of the slabs, so as to fully increase the temperature of the slabs and improve the uniformity of the temperature of the slabs.

[0040] For example, combining 2 and Figure 3 The hot plate assemblies 12-14 are arranged downstream of the preheating plate assembly 11, and each hot plate assembly includes at least one hot plate and at least one heat pipe for conveying a mixture of steam and hot air, and is configured to perform wet heat treatment on the slab.

[0041] In the embodiments of the present disclosure, “downstream” of A relative to B means along the direction of the slab’s travel, e.g. Figure 1 In the first direction R, A is at the rear end of B, that is, the slab passes through B first and then passes through A.

[0042] For example, combining 2 and Figure 3 Taking the hot plate assembly 12 as an example, the hot plate assembly 12 includes a first hot plate 121A and a second hot plate 121B that are arranged opposite to each other, and a slab conveying device 15 is arranged between the first hot plate 121A and the second hot plate 121B, and the slab conveying device 15 is configured to convey the slab. The hot plate assembly 12 also includes a first heat pipe 122A and a second heat pipe 122B, the first heat pipe 122A is arranged on a side of the first hot plate 121A away from the second hot plate 121B, and is configured to blow air to the first hot plate 121A, thereby conveying a mixture of steam and hot air to the slab, and the second heat pipe 122B is arranged on a side of the second hot plate 121B away from the first hot plate 121A, and is configured to guide air in a direction away from the second hot plate 121B, and the wind direction formed thereby is shown by the arrow in the figure, for example, upward, and the wind blown out of the first heat pipe 122A is a mixture of steam and hot air. Through the above configuration, the wet heat treatment of the slab can be fully realized to improve the plasticity of the slab.

[0043] For example, combining 2 and Figure 3 The number of the hot plate assemblies is multiple, and three are shown as an example. On the same side of the slab conveying device 15, the first heat pipes and the second heat pipes of the multiple hot plate assemblies 12-14 are arranged alternately. That is, the wind directions of adjacent hot plate assemblies are opposite, thereby improving the uniformity of the wet heat treatment of the slab, and performing substantially the same and uniform treatment on both sides of the slab.

[0044] For example, combining 2 and Figure 3The hot plate assembly 13 includes a first hot plate 131A and a second hot plate 131B that are arranged opposite to each other, and a slab conveying device 15 is arranged between the first hot plate 131A and the second hot plate 131B. The hot plate assembly 13 also includes a first heat pipe 132A and a second heat pipe 132B. The first heat pipe 132A is arranged on a side of the first hot plate 131A away from the second hot plate 121B, and is configured to blow air toward the first hot plate 131A, thereby conveying a mixture of steam and hot air to the slab. The second heat pipe 132B is arranged on a side of the second hot plate 131B away from the first hot plate 131A, and is configured to guide air in a direction away from the second hot plate 131B. The wind direction formed thereby is downward as shown by the arrow in the figure.

[0045] For example, combining 2 and Figure 3 The hot plate assembly 14 includes a first hot plate 141A and a second hot plate 141B that are arranged opposite to each other, and a slab conveying device 15 is arranged between the first hot plate 141A and the second hot plate 141B. The hot plate assembly 14 also includes a first heat pipe 142A and a second heat pipe 142B. The first heat pipe 142A is arranged on a side of the first hot plate 141A away from the second hot plate 121B, and is configured to blow air toward the first hot plate 141A. The second heat pipe 142B is arranged on a side of the second hot plate 141B away from the first hot plate 141A, and is configured to guide air in a direction away from the second hot plate 141B. The wind direction formed thereby is upward as shown by the arrow in the figure.

[0046] Therefore, if Figure 3 As shown, above the slab conveying device 15, the second heat pipe 122B, the first heat pipe 132A and the second heat pipe 142B are arranged in sequence, and below the slab conveying device 15, the first heat pipe 122A, the second heat pipe 132B and the first heat pipe 142A are arranged in sequence, so that on the same side of the slab conveying device 15, the first heat pipes and the second heat pipes of the plurality of hot plate assemblies 12-14 are arranged alternately, so that the wind directions of the adjacent hot plate assemblies are opposite, Figure 3 In the embodiment, the wind directions formed by the hot plate assemblies 12-14 are upward, downward, and upward, respectively, so as to fully improve the uniformity of the wet heat treatment of the slab and perform substantially the same and uniform treatment on both sides of the slab.

[0047] For example, in other embodiments, the number of heat plate assemblies may be more or less, such as two, four, five, six, etc., which may be selected according to the needs. For example, when the number of heat plate assemblies is four, the wind directions formed by the four heat plate assemblies may be upward, downward, upward, downward, respectively, to achieve alternating distribution.

[0048] For example, in some embodiments, each of the above-mentioned preheating plates and hot plates may include an oil channel, and is heated by hot oil. The first heat pipe blowing air to the first hot plate may be called a blast duct, which can blow hot air to the slab, and the second heat pipe may be called an induced draft duct, which draws air outward, thereby accelerating the flow of hot air. For example, in other embodiments, each of the preheating plates and hot plates may also use heating devices such as electric heating plates and water heating plates, and the embodiments of the present disclosure do not specifically limit this.

[0049] For example, in some embodiments, the wind in the first heat pipe is a mixture of hot air and steam that has been mixed in advance. For example, the front end of the first heat pipe may have a mixing chamber for mixing hot air and steam. After that, the mixture is blown onto the slab through the first heat pipe.

[0050] In the embodiments of the present disclosure, a mixture of hot air and steam is used for preheating. In this process, the dew point temperature and relative humidity can be precisely adjusted to ensure that the mixed hot air penetrates the slab in the preheating device without condensation, so that the overall temperature of the slab is increased, thereby improving the heat transfer efficiency of the slab in the subsequent press device, shortening the residence time of the slab in the press device, and improving the output and product quality of the production line. In addition, during the slab preheating process, the alternating and corresponding arrangement of heat pipes is conducive to the uniform and synchronous increase of the core and surface temperatures of the slab, and the slab preheating temperature can reach above 70°C. Through the above-mentioned wet heat treatment, the slab can have a uniform slab temperature and plasticity before entering the subsequent press device, thereby improving the quality of the final slab.

[0051] In addition, in the embodiments of the present disclosure, by adding a pressing roller device 20 after the preheating device 10, for example, adding a pressing roller device 20 at the outlet of the last group of hot plate assemblies, the heat-treated slab can be further compressed in time to reduce the thickness of the slab, increase the density of the slab, increase the internal bonding strength of the slab, and improve the intrinsic quality of the slab, thereby creating sufficient process conditions for subsequent high-speed hot pressing and other process flows of the slab, avoiding damage to the steel belt of the subsequent continuous press / flat press, improving the pressing efficiency of the subsequent continuous press / flat press, and increasing output; at the same time, improving the internal bonding strength of the slab means that the slab can enter the continuous press more safely and at a higher speed, avoiding the breakage and back-spraying of the slab when the continuous press is fed at a high speed, thereby improving the safety and production efficiency of the subsequent continuous press / flat press, and improving the quality of the finished product.

[0052] For example, in some embodiments, Figure 1 As shown, the slab processing equipment further includes a press device 30, which is disposed downstream of the pressing roller device 20 and is configured to press the slab output from the pressing roller device 20. Figure 1In the figure, the direction of the slab is the first direction R, and the press device 30 is arranged downstream of the roller device 20, indicating that the slab is first processed by the roller device 20 and then processed by the press device 30. For example, the press device 30 is a continuous press, a hot press or a flat press, which is used to perform subsequent pressing on the slab, such as high-speed hot pressing, so that the slab is close to the final product.

[0053] For example, Figure 4 Another partial schematic diagram of the slab processing equipment provided by the embodiment of the present disclosure is shown. In some embodiments, as Figure 4 As shown, the slab processing equipment may also include a pre-pressing device 40, which is arranged upstream of the preheating device 10 and is configured to pre-press the slab. The pre-pressing device 40 is arranged upstream of the preheating device 10, which means that the slab is first processed by the pre-pressing device 40 and then transported to the preheating device 10 for heat treatment. The pre-pressed slab has an initial shape, which may have certain defects and a certain gap with the finished product. By performing subsequent heat treatment on the slab in the initial shape and secondary compression treatment by the pressing roller device 20, the density and internal bonding strength of the slab can be improved, and the intrinsic quality of the slab (such as crushing intrinsic defects such as fiber balls or rubber blocks) can be improved, thereby creating sufficient process conditions for subsequent high-speed hot pressing and other process flows of the slab.

[0054] For example, in some embodiments, the pressing roller device 20 has a first compression speed for the slab, and the pre-pressing device 40 has a second compression speed for the slab, and the first compression speed is greater than the second compression speed. That is, the secondary compression speed of the slab by the pressing roller device 20 is greater than the pre-pressing speed of the pre-pressing device 40, and the pressing roller device 20 can achieve rapid compression, so as to timely compress the slab with better plasticity in a heated state, improve the density and internal bonding strength of the slab, remove the inherent defects of the slab, and improve the quality of the slab.

[0055] For example, Figure 5 A three-dimensional schematic diagram of a pressing roller device of a slab processing device provided by at least one embodiment of the present disclosure is shown. In some embodiments, as Figure 5 As shown, the roller device 20 includes a frame 21 and a first roller 22 and a second roller 23; the first roller 22 and the second roller 23 are arranged on the frame 21, and at least one of the first roller 22 and the second roller 23 is movable to adjust the gap between the first roller 22 and the second roller 23, so that the roller device 20 can provide a corresponding pressing force and control the thickness of the output slab. Figure 5 In the embodiment of the present invention, the first pressing roller 22 and the second pressing roller 23 are arranged in an upper and lower position to facilitate receiving the input slab.

[0056] For example, the first pressing roller 22 includes a first roller 221, and the second pressing roller 23 includes a second roller 231. The diameter of the first roller 221 and / or the second roller 231 is 500 mm-800 mm, such as 500 mm, 550 mm, 600 mm, 650 mm, 700 mm, 750 mm or 800 mm. Thus, the pressing roller device 20 can use a large-diameter roller pressing method to quickly compress the slab and improve the pressing force. For example, the pressing roller device 20 is implemented as a heavy pressing roller device.

[0057] For example, Figure 6 The schematic diagram of the structure of the first pressing roller is shown in FIG. Figure 6 As shown, the first pressing roller 22 further includes a first shaft head 222 and a first rib plate 223. One first shaft head 222 is connected to two (as shown in the figure) or more than two first rib plates 223. The first rib plate 223 can support the first roller 221 and the first shaft head 222 to achieve structural stability. For example, the two first shaft heads 222 are respectively arranged on opposite sides of the first roller 221 along the axial direction for easy installation.

[0058] Figure 7 Schematic diagram of the structure of the second pressing roller is shown. Similarly, Figure 7 As shown, the second pressing roller 23 further includes a second shaft head 232 and a second rib plate 233. One second shaft head 232 is connected to two (as shown in the figure) or more than two second rib plates 233. The second rib plate 233 can support the second shaft head 232 and the second rib plate 233 to achieve structural stability. For example, the two second shaft heads 232 are respectively arranged on opposite sides of the second roller 231 along the axial direction for easy installation.

[0059] For example, in some embodiments, the roller device 20 further includes a device for controlling at least one of the first roller 22 and the second roller 23 to move. For example, in some embodiments, the first roller 22 is movable and the second roller 23 is fixed, so that the distance between the first roller 22 and the second roller 23 is controlled by controlling the moving distance of the first roller 22 relative to the second roller 23; or, in other embodiments, the second roller 23 is movable and the first roller 22 is fixed, so that the distance between the first roller 22 and the second roller 23 is controlled by controlling the moving distance of the second roller 23 relative to the first roller 22; or, in other embodiments, both the first roller 22 and the second roller 23 are movable, and the distance between the first roller 22 and the second roller 23 is controlled by controlling the movement of one or both of the first roller 22 and the second roller 23. Below, the roller device 20 is introduced by taking the first roller 22 as an example in which the first roller 22 is movable and the second roller 23 is fixed.

[0060] For example, Figure 5As shown, the roller device 20 further includes a first lifting device 24, a mounting plate 25 and a slide rail 26; the first lifting device 24 is disposed on the frame 21 and includes a first lifting end 24A. The first lifting device 24 can control the extension and retraction of the first lifting end 24A, that is, Figure 5 The first lifting end 24A is controlled to move up and down; the mounting plate 25 is connected to the first lifting end 24A, and the first pressure roller 22 is connected to the mounting plate 25, so that the first lifting device 24 can control the lifting of the mounting plate 25, thereby driving the lifting of the first pressure roller 22; the slide rail 26 is set on the frame 21, and the mounting plate 25 is slidably connected to the slide rail 26, so that the mounting plate 25 can be lifted and lowered on the track defined by the slide rail 26.

[0061] For example, in some embodiments, Figure 5 As shown, the first lifting device 24 includes a displacement sensor 27, and the displacement sensor 27 is configured to detect the lifting distance of the first lifting end 24A. For example, the position of the second pressing roller 23 is fixed, and the gap between the first pressing roller 22 and the second pressing roller 23 can be obtained through the lifting distance detected by the displacement sensor 27, which helps to achieve feedback adjustment, for example, according to the detection data of the displacement sensor 27, the first lifting end 24A is controlled to continue to lift or lower, so as to achieve a preset gap between the first pressing roller 22 and the second pressing roller 23, thereby providing a preset pressing force and controlling the output slab to reach a preset thickness.

[0062] For example, the displacement sensor 27 may be an inductive displacement sensor, a capacitive displacement sensor, or other displacement sensors, which is not specifically limited in the embodiments of the present disclosure.

[0063] For example, in some embodiments, Figure 5 As shown, the pressing roller device 20 further includes a limiting device 28, which is arranged on one side of the slide rail 26 close to the second pressing roller 23, that is, Figure 5 The lower side of the first roller and the second roller is configured to limit the minimum gap between the first roller and the second roller. For example, the limiting device 28 can also be a limiting block or other structures. When the mounting plate 25 moves to the limiting device 28, the limiting device 28 can clamp the mounting plate 25, so that the mounting plate 25 cannot continue to move, thereby preventing the first roller and the second roller from being too close and the relative force between the two rollers being too large, thereby preventing the roller from being damaged, the machine from being damaged, and other problems.

[0064] For example, in some embodiments, Figure 5As shown, the roller device 20 further includes a first roller position limit monitoring device 29, which is disposed on a side of the first roller 22 away from the second roller 23 and configured to monitor the displacement of the first roller 22 on the side away from the second roller 23. For example, the first roller 22 has a safe movement displacement, and beyond the displacement, the first roller 22 may cause damage to the device. The first roller position limit monitoring device 29 detects the displacement of the first roller 22 on the side away from the second roller 23, and can give an alarm when the first roller 22 is about to reach the safe movement displacement, and control the first roller 22 to stop moving, so as to ensure the safety of the device.

[0065] For example, in some examples, the first roller limit monitoring device 29 may adopt a photoelectric sensor. When the first roller 22 exceeds the safe movement displacement, the photoelectric sensor will be triggered, thereby realizing the monitoring of the first roller 22.

[0066] For example, in some embodiments, Figure 5 As shown, the roller device 20 also includes a device for changing the speed of the first roller 22. For example, the roller device 20 includes a first reducer fixing frame 201, a first reducer 202, and a second lifting device 203; the first reducer fixing frame 201 is set on the mounting plate 25, so that it can move with the mounting plate 25, thereby synchronizing with the movement of the first roller 22; the first reducer 202 is set on the first reducer fixing frame 201, and is configured to be connected to the first roller 22, for example, connected to the first roller 22 through a coupling, so as to change the speed of the first roller 22; the second lifting device 203 is set on the frame 21, including a second lifting end 203A, and the second lifting device 203 can control the extension and retraction of the second lifting end 203A, that is, when Figure 5 In the embodiment, the second lifting end 203A can be raised and lowered, and the first reducer fixing frame 201 is connected to the second lifting end 203A, so that the second lifting end 203A can provide a certain supporting force for the first reducer fixing frame 201 to maintain the installation balance of the first reducer fixing frame 201.

[0067] For example, the first lifting device 24 and the second lifting device 203 move synchronously, thereby providing a balanced support force to the first reducer fixing frame 201 to ensure the stability of the first reducer fixing frame 201. For example, in some examples, the first lifting device 24 and the second lifting device 203 can use controllable telescopic devices such as oil cylinders and air cylinders. For example, in one example, as the main device for controlling the lifting of the mounting plate, the first lifting device 24 can use an oil cylinder; the second lifting end 203A can use an air cylinder to achieve counterweight, maintain the installation balance of the first reducer fixing frame 201, and assist the first lifting device 24 to complete the lifting work.

[0068] For example, in some embodiments, the slab processing equipment further includes an encoder and a controller; the encoder is configured to obtain the rotation speed of the first pressing roller 22; and the controller is configured to adjust the rotation speed of the first reducer 202 according to the rotation speed of the first pressing roller 22. Therefore, by accurately selecting the reducer and adding the encoder, the rotation speed can be synchronously adjusted and controlled to match the operation of the production line.

[0069] In the embodiment of the present disclosure, the pressure, spacing and speed of the first pressing roller 22 and the second pressing roller 23 can be precisely controlled through the first lifting device 24 and the reducer and other structures.

[0070] For example, in some embodiments, the pressing roller device 20 further includes a device for changing the speed of the second pressing roller 23. Figure 5 As shown, the roller device 20 includes a second reducer fixing frame 204 and a second reducer 205, and the second reducer 205 is connected to the second roller 23 through a coupling 206. For example, the second reducer fixing frame 204 and the second reducer 205 are fixedly arranged, for example, fixedly arranged on a vertical plate 211 (described later). For example, the second roller 23 and the second reducer 205 can also be controlled by an encoder and a controller, for example, the encoder and the controller control the second roller 23 and the second reducer 205 synchronously with the control of the first roller 22 and the first reducer 202, so as to match the rotation speeds of the first roller 22 and the second roller 23.

[0071] For example, in some embodiments, Figure 5 As shown, the frame 21 of the roller device 20 includes structures such as a vertical plate 211, a pull rod 212, a support beam 213 and a base plate assembly 214. Two groups of vertical plates 211 are relatively arranged on both sides of the first roller 22 and the second roller 23 along the axial direction, and are configured to support the first roller 22 and the second roller 23 and other structures; the support beam 213 is connected between the two vertical plates 211 to maintain the relative distance between the two vertical plates 211; a plurality of pull rods 212 are cross-arranged between the two vertical plates 211 to maintain the parallel setting and stability of the two vertical plates 211; the base plate assembly 214 is configured to be fixed to the ground or the setting plane of the roller device 20 to achieve the fixed setting of the frame 21.

[0072] For example, in some embodiments, the slab processing equipment further includes more functional devices, such as, Figure 8 FIG. 2 shows another part of the structural schematic diagram of the slab processing equipment provided by at least one embodiment of the present disclosure; Figure 8 As shown, in some embodiments, upstream of the pressing roller device 20, the slab processing equipment may also include a hopper 51, a buffer silo 52, a fiber silo 53, a lower hopper 54, a paving machine 55, a leveling device 56, a sweeping device 57, an electronic scale 58 and other structures.

[0073] For example, the hopper 51 can swing, and materials (such as particulate matter used to form slabs, such as wood chips, etc.) are added from the top of the hopper 51. The hopper 51 swings back and forth to achieve uniform lateral spreading of the materials. The buffer bin 52 has a buffering effect on materials with a higher drop. The hopper 51 and the buffer bin 52 cooperate to make the materials fall into the fiber bin 53 uniformly laterally. For example, there is an electronic scale in the fiber bin 53. According to the requirements for the slabs, the materials are measured and transported to the paving machine 55. The paving machine 55 evenly spreads the materials horizontally and vertically onto the conveyor belt of the production line, and then the slabs are leveled by the leveling device 56 and the sweeping device 57. The electronic scale 58 detects the quality of the slabs.

[0074] For example, Figure 1 As shown, upstream of the pressing roller device 20 , the slab processing equipment may further include a slab saw 61 , a magnet device 62 , a metal detector 63 , a movable trolley 64 , a recovery device 65 and other structures.

[0075] For example, in Figure 8 The paved material passes through the pre-pressing device 40 for the first compression to obtain the slab in the initial state. The slab in the initial state is trimmed by the slab saw 61 to ensure the width of the slab entering the subsequent equipment. After that, the metal impurities are adsorbed by the magnet device 62 to remove the impurities in the slab. Then, the metal detector 63 is used to detect whether there are metal impurities in the slab. The movable trolley 64 takes corresponding actions according to the detection results. If the slab is unqualified, the bearing part of the movable trolley 64 moves to the right to expose the entrance of the recovery device 65, so that the unqualified slab falls into the recovery device 65. If it is qualified, the movable trolley 64 moves to the right to expose the entrance of the recovery device 65. The bearing part of the trolley 64 moves to the left to carry the slab, and the slab is sent to the preheating device 10 by means of a breathable mesh belt. The preheating device 10 includes, for example, a preheating plate and a hot plate. The hot plate uses a mixture of steam and hot air to perform wet heat treatment on the slab, so that the slab has good thermoplasticity. After that, the slab enters a precision servo-controlled pressing roller device 20, such as a counter-pressing heavy pressing roller device, to be subjected to a rapid and powerful compression force. Thus, the pressing roller device 20 performs a second compression on the heat-treated slab, thereby improving the thickness accuracy of the slab, significantly enhancing the bonding strength inside the slab, and ensuring that the subsequent continuous press / flat press can output the slab efficiently and stably.

[0076] For example, Figure 4 As shown, in some embodiments, downstream of the pressing roller device 20, the slab processing equipment also includes structures such as a transition platform 71 and a cutting device 72.

[0077] For example, Figure 4As shown, the slab after secondary compression by the pressing roller device 20 enters the pressing device 30 for continuous pressing to make the slab close to the finished product. Afterwards, the slab output by the pressing device 30 is transported to the cutting device 72 through the transition platform 71. The cutting device 72 includes cutting equipment such as flying saws, which are used to cut the plate according to the board output requirements to form the final finished product and output the finished product.

[0078] The slab processing equipment and the above-mentioned process flow provided by the embodiments of the present disclosure can be used, for example, for medium density fiberboard (MDF), such as the preparation of ultra-thin fiberboard slabs, and of course can also be used for the preparation of other man-made boards. By adding a post-compression device, that is, a pressure roller device 20, to the outlet end of the preheating device 10, the heated plate can be subjected to a high-pressure treatment device, thereby improving the density and strength of the slab, while improving the intrinsic quality of the slab (such as an ultra-thin fiberboard slab), such as crushing or thinning the colloids, lumps and other substances in the slab to prevent hard objects from damaging the steel belt of the subsequent continuous press; at the same time, the thickness of the compressed slab is thinner, for example, the compression rate is greater than 30%, thereby reducing the wedge angle of the continuous press inlet, which is beneficial for the slab to enter the continuous press inlet at a high speed, thereby improving the safety and production efficiency of the continuous press operation, while avoiding defects such as backspray and surface cracks on the slab at the continuous press inlet, thereby improving the quality of the final slab.

[0079] There are a few points to note:

[0080] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0081] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale.

[0082] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0083] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A slab processing device, comprising: a preheating device configured to heat treat the slab, and The pressing roller device is arranged at the outlet of the preheating device and is configured to compress the slab output from the preheating device.

2. The slab processing equipment according to claim 1, wherein: The preheating device is configured to perform heat treatment on the slab, comprising: The preheating device is configured to perform wet heat treatment on the slab using a mixture of steam and hot air.

3. The slab processing equipment according to claim 1 or 2, wherein: The preheating device comprises: A preheating plate assembly, comprising at least one preheating plate, configured to preheat the slab, The hot plate assembly is arranged downstream of the preheating plate assembly, comprises at least one hot plate and at least one heat pipe for conveying the mixture, and is configured to perform wet heat treatment on the slab.

4. The slab processing equipment according to claim 3, wherein: The hot plate assembly comprises: The first hot plate and the second hot plate are arranged opposite to each other, a first heat pipe, disposed on a side of the first heat plate away from the second heat plate, and configured to blow air toward the first heat plate; The second heat pipe is disposed on a side of the second heat plate away from the first heat plate and is configured to guide air in a direction away from the second heat plate. Wherein, a slab conveying device is arranged between the first hot plate and the second hot plate, and is configured to convey the slab.

5. The slab processing equipment according to claim 4, wherein: The number of the heat plate assemblies is multiple, On the same side of the slab conveying device, first heat pipes and second heat pipes of a plurality of hot plate assemblies are alternately arranged.

6. The slab processing equipment according to claim 1 or 2, further comprising: The press device is arranged downstream of the pressing roller device and is configured to press the slab output from the pressing roller device.

7. The slab processing equipment according to claim 1 or 2, further comprising: The pre-pressing device is arranged upstream of the preheating device and is configured to perform pre-pressing treatment on the slab.

8. The slab processing equipment according to claim 7, wherein: The pressing roller device has a first compression speed for the slab, and the pre-pressing device has a second compression speed for the slab. The first compression speed is greater than the second compression speed.

9. The slab processing equipment according to claim 1 or 2, wherein: The pressing roller device comprises: framework, and A first pressing roller and a second pressing roller are disposed on the frame, wherein at least one of the first pressing roller and the second pressing roller is movable to adjust a gap between the first pressing roller and the second pressing roller.

10. The slab processing equipment according to claim 9, wherein: The first pressing roller comprises a first roller, and the second pressing roller comprises a second roller. The diameter of the first roller and / or the second roller is 500 mm-800 mm.

11. The slab processing equipment according to claim 9, wherein: The pressing roller device also includes: A first lifting device, disposed on the frame, comprises a first lifting end, A mounting plate connected to the first lifting end, wherein the first pressing roller is connected to the mounting plate; and A slide rail is arranged on the frame, wherein the mounting plate is slidably connected to the slide rail.

12. The slab processing equipment according to claim 11, wherein: The first lifting device includes a displacement sensor, and the displacement sensor is configured to detect a lifting distance of the first lifting end.

13. The slab processing equipment according to claim 9, wherein: The pressing roller device also includes: The limiting device is arranged on a side of the slide rail close to the second pressure roller and is configured to limit a minimum gap between the first roller and the second roller.

14. The slab processing equipment according to claim 9, wherein: The pressing roller device also includes: The first pressing roller position limit monitoring device is arranged on a side of the first pressing roller away from the second pressing roller, and is configured to monitor the displacement of the first pressing roller on the side away from the second pressing roller.

15. The slab processing equipment according to claim 9, wherein: The pressing roller device also includes: The first reducer fixing frame is arranged on the mounting plate, a first reducer, disposed on the first reducer fixing frame and configured to be connected to the first pressing roller, and The second lifting device is arranged on the frame and comprises a second lifting end, wherein the first reducer fixing frame is connected to the second lifting end.

16. The slab processing equipment according to claim 15, further comprising: an encoder configured to obtain a rotation speed of the first pressing roller, and The controller is configured to adjust the rotation speed of the first reducer according to the rotation speed of the first pressure roller.

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