A hot press and hot pressing method for producing fiberboard

Abstract

This invention relates to a hot press and hot pressing method for producing fiberboard; it relates to the field of fiberboard production technology. The hot press for producing fiberboard includes a cleaning roller, to which a rotary motor is connected. An air blowing roller is provided on one side of the cleaning roller, and both ends of the air blowing roller are slidably connected to a bracket. A fixing arm is snapped below one end of the air blowing roller, and the fixing arm is fixed to the cylinder rod of a reciprocating cylinder. The reciprocating cylinder is fixedly connected to a mounting frame. When the steel strip rotates to the residue scraper, the residue scraper will scrape against the outer surface of the steel strip, and the residue will fall into the residue collection box along the residue collection box. After the residue collection box is pulled out, it is convenient for unified treatment and recycling of the residue. When the steel strip rotates to the cleaning roller, the inner surface of the steel strip can be simply cleaned, improving the transmission effect of the steel strip. When the steel strip rotates to the cleaning roller, the rotary motor drives the cleaning roller to clean the outer surface of the steel strip, greatly improving the cleaning effect of the steel strip.

Description

Technical Field

[0001] This invention relates to the field of fiberboard production technology, and more specifically to a hot press for producing fiberboard. Background Technology

[0002] Wood fiberboard (WFPC) is a three- or multi-layered sheet material made by rotary cutting wood logs into veneers or slicing wood squares into thin sheets, and then gluing them together with adhesives. It typically uses an odd number of veneer layers, with the fiber directions of adjacent veneers glued together perpendicular to each other. In WFPC production, the hot press is one of the main pieces of equipment in the process, used to hot-press the glued and assembled board blanks.

[0003] Chinese Patent Publication No. CN 212312282 U discloses a fiberboard hot pressing device, including a workbench and a fixed box located above the workbench. Vertical support rods are fixedly connected to both sides of the bottom of the fixed box, and the bottom of the support rods is fixedly installed on the top of the workbench. A hot pressing support platform is fixedly installed on the workbench located inside the support rods. A horizontal plate is provided above the hot pressing support platform. Sliding sleeves are fixedly connected to both sides of the horizontal plate and are slidably mounted on the support rods. A hot pressing plate is movably installed below the horizontal plate.

[0004] When using the aforementioned fiberboard hot press, the board blank is placed directly onto the hot press manually. It cannot be used with a board density testing device. Moreover, a large amount of residue and glue will remain on the hot press support table after hot pressing, requiring manual cleaning at regular intervals. It cannot achieve online automatic cleaning, resulting in a significant waste of waiting time during cleaning and greatly reducing work efficiency. Summary of the Invention

[0005] Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a hot press for producing fiberboard. This solves the problems of the above-mentioned fiberboard hot press, which requires manual placement of the board blank directly onto the hot press and cannot be used with a density testing device for the board blank. Furthermore, a large amount of residue and glue remain on the hot press support table after hot pressing, requiring manual cleaning at regular intervals. Online automatic cleaning cannot be achieved, resulting in a significant waste of waiting time during cleaning and greatly reducing work efficiency.

[0007] Technical solution

[0008] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0009] A hot press for producing fiberboard includes a base, a frame body fixedly mounted on the base, a hot press cylinder inside the frame body, and a hot press plate fixed on the cylinder rod of the hot press cylinder; a steel strip is provided below the hot press plate, the steel strip is wrapped between the base and the frame body, and a support platform fixed to the base is also provided on the steel strip.

[0010] The steel strip has its two ends wrapped around the edge roller and the end roller, and its lower part is wound around the drive roller, the mating roller, the intermediate roller, the pressure roller and the transition roller. A cleaning roller that is in contact with the inner side of the steel strip is provided above the intermediate roller; a cleaning component that is in contact with the outer side of the steel strip is provided on the outer side of the mating roller.

[0011] As a further technical solution of the present invention, the transmission roller is arranged above the mating roller and close to the cleaning roller, and the steel belt is arranged in an "S" shape when it passes over the transmission roller and the mating roller.

[0012] As a further technical solution of the present invention, the transmission roller, the mating roller, the intermediate roller and the lower pressure roller are mounted on the inner side of the mounting frame at both ends by bearings with seats, wherein the outer side of one end of the transmission roller is also connected to the output shaft of the transmission motor through a coupling; the transmission motor is fixed on the outer side of the mounting frame.

[0013] As a further technical solution of the present invention, eight hot-pressing cylinders are provided, of which four hot-pressing cylinders form a group, and two groups of hot-pressing cylinders are respectively fixed on both sides inside the frame body; the top of the hot-pressing cylinder is movably connected to the frame body through a rotating shaft.

[0014] As a further technical solution of the present invention, all of the aforementioned hot-press cylinders are connected to the hydraulic station via hydraulic pipes; the hydraulic station is fixed on the top of the frame, and side guardrails are welded on both sides of the top of the hydraulic station frame.

[0015] As a further technical solution of the present invention, a slag removal component is provided on the side of the base away from the mounting frame; the slag removal component includes a slag collection box, and a slag scraper is inclinedly provided on the top of the slag collection box, the slag scraper being attached to and connected to the steel strip; a slag collection box is also provided inside the slag collection box.

[0016] As a further technical solution of the present invention, the cleaning component includes a cleaning roller, and a rotary motor is connected to the outside of the cleaning roller; an air blowing roller is provided on one side of the cleaning roller, and the two ends of the air blowing roller are slidably connected to the bracket; a fixing arm is snapped into the lower part of one end of the air blowing roller, and the fixing arm is fixed to the cylinder rod of the reciprocating cylinder; the reciprocating cylinder is fixedly connected to the mounting bracket.

[0017] As a further technical solution of the present invention, one end of the air blowing roller is connected to a compressed air source through an air pipe, and a plurality of air blowing holes are provided on the air blowing roller, with the air outlet openings facing the cleaning roller.

[0018] A hot pressing method for producing fiberboard using a hot press includes the following steps:

[0019] Step 1: Feeding the fiberboard blank. The steel strip at the top of the mounting frame is the feeding area. After the flattened blank is placed on the steel strip, the drive motor drives the drive roller to rotate. With the cooperation of the mating roller, intermediate roller, lower pressure roller, transition roller and edge roller, the steel strip is driven to rotate. As the steel strip rotates, it transports the blank to the bottom of the hot press plate; thus realizing the feeding of the blank.

[0020] Step two, hot pressing of the slab: When the slab is below the hot press plate, multiple hot press cylinders simultaneously push the hot press plate to press the slab. The hot press plate also dries and heats the colloid inside the slab, ensuring that the slab is pressed into a sheet with a certain hardness. Since there are eight hot press cylinders, four of them form a group, and the two groups of hot press cylinders are fixed on both sides inside the frame body. During pressing, first adjust the pressure of one group of hot press cylinders to be greater than the pressure of the other group, so that the gas in the slab can be vented, ensuring that the slab can be compacted as a whole. Then, the pressure parameters of each hot press cylinder can be adjusted individually to achieve localized pressurization, ensuring that the density of the slab can be compacted. After all the hot press cylinders are raised, the drive roller drives the steel belt to rotate, thereby removing the hot-pressed slab.

[0021] Step 3: Cleaning the steel strip. Since the slab is made of a mixture of fiber powder and glue, a lot of glue and residue will adhere to the steel strip during hot pressing. It is difficult to clean over time. Therefore, when the steel strip rotates to the residue scraper, the residue scraper will scrape against the outer surface of the steel strip. The residue will fall into the residue collection box along the slag collection box. After the residue collection box is pulled out, it is convenient for the unified treatment and recycling of the residue.

[0022] Step four, cleaning the steel belt: Since the scraper only removes a large amount of residue, some fine impurities still adhere to the outer surface of the steel belt, and there is fine dust on the inner side of the steel belt. To prevent slippage during transmission, the inner surface of the steel belt is briefly cleaned when it rotates to the cleaning roller, improving the transmission efficiency of the steel belt. When the steel belt rotates to the cleaning roller, the rotating motor drives the cleaning roller to clean the outer surface of the steel belt, greatly improving the cleaning effect of the steel belt.

[0023] Step 5: Cleaning the cleaning roller. Since the cleaning roller has several bristles on the outside, the residue will remain inside the bristles. Therefore, compressed air is used to blow and clean the cleaning roller. External compressed air enters the air roller and blows and cleans the cleaning roller through the air holes on its surface. During blowing, the reciprocating cylinder drives the air roller to move back and forth along the bracket through the fixed arm, which makes it easier to blow off the residue on the cleaning roller.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In this invention, when the steel strip rotates to the residue scraper, the residue scraper will scrape against the outer surface of the steel strip, and the residue will fall into the residue collection box along the slag collection box. After the residue collection box is pulled out, it is convenient for the unified treatment and recycling of the residue.

[0026] 2. In this invention, when the steel belt rotates to the cleaning roller, the inner surface of the steel belt can be simply cleaned, improving the transmission effect of the steel belt; when the steel belt rotates to the cleaning roller, the rotating motor drives the cleaning roller to clean the outer surface of the steel belt; thus greatly improving the cleaning effect of the steel belt.

[0027] 3. In this invention, since the cleaning roller is provided with several bristles on the outside, the residue that is cleaned will remain in the bristles. Therefore, compressed air is used to blow clean the cleaning roller. External compressed air enters into the air-blowing roller and blows clean the cleaning roller through the air-blowing holes on its surface. During blowing, the reciprocating cylinder drives the air-blowing roller to move back and forth along the bracket through the fixed arm, thereby making it easier to blow off the residue on the cleaning roller.

[0028] 4. This invention operates online during both sweeping and cleaning, without interrupting the transfer of slabs or the normal hot pressing operation of the hot press. There is no waiting time, enabling continuous operation of the equipment, which greatly improves the hot pressing efficiency of the hot press. Moreover, no manual intervention is required when cleaning the steel strip, greatly reducing the intensity of manual labor. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 In this invention Figure 1 A schematic diagram of the bottom structure;

[0031] Figure 3 In this invention Figure 1 The right view;

[0032] Figure 4 In this invention Figure 3 AA section view;

[0033] Figure 5 This is a schematic diagram of the steel strip installation method in this invention;

[0034] Figure 6 This is a cross-sectional view of the slag removal component in this invention;

[0035] Figure 7 This is a schematic diagram of the cleaning component structure in this invention;

[0036] Figure 8 In this invention Figure 2 A magnified view of a portion of the image.

[0037] In the diagram: 1-Base, 2-Frame, 3-Hot press cylinder, 4-Hydraulic station, 5-Steel belt, 6-Slag removal assembly, 7-Drive roller, 8-Matching roller, 9-Intermediate roller, 10-Lower pressure roller, 11-Transition roller, 12-Edge roller, 13-End roller, 14-Cleaning roller, 15-Cleaning assembly, 16-Drive motor, 17-Bearing platform, 18-Hot press plate, 19-Mounting frame;

[0038] 61-Slag collection box; 62-Slag scraper; 63-Slag collection box;

[0039] 151-Cleaning roller, 152-Blowing roller, 153-Fixed arm, 154-Reciprocating cylinder, 155-Bracket. Detailed Implementation

[0040] Please see Figure 1-8 A hot press for producing fiberboard includes a base 1, a frame 2 fixedly mounted on the base 1, a hot press cylinder 3 disposed inside the frame 2, and a hot press plate 18 fixed on the cylinder rod of the hot press cylinder 3; a steel strip 5 disposed below the hot press plate 18, the steel strip 5 being wrapped between the base 1 and the frame 2, and a support platform 17 fixed to the base 1 being disposed on the steel strip 5;

[0041] The steel strip 5 has its two ends wrapped around the edge roller 12 and the end roller 13, and the steel strip 5 is wound around the transmission roller 7, the mating roller 8, the intermediate roller 9, the pressure roller 10 and the transition roller 11. A cleaning roller 14 that is in contact with the inner side of the steel strip 5 is provided above the intermediate roller 9. A cleaning component 15 that is in contact with the outer side of the steel strip 5 is provided on the outer side of the mating roller 8.

[0042] As a further optimization, the cleaning component 15 includes a cleaning roller 151, which is externally connected to a rotary motor; an air blowing roller 152 is provided on one side of the cleaning roller 151, and the two ends of the air blowing roller 152 are slidably connected to the bracket 155; a fixing arm 153 is snapped into the lower part of one end of the air blowing roller 152, and the fixing arm 153 is fixed to the cylinder rod of the reciprocating cylinder 154; the reciprocating cylinder 154 is fixedly connected to the mounting bracket 19.

[0043] More specifically, one end of the air blowing roller 152 is connected to a compressed air source through an air pipe, and several air blowing holes are opened on the air blowing roller 152, with the air outlet opening facing the cleaning roller 151.

[0044] By adopting the above technical solution, since the cleaning roller 151 has several bristles on its outside, the residue that is cleaned will remain in the bristles. Therefore, compressed air is used to blow clean the cleaning roller 151. External compressed air enters the air blowing roller 152 and blows clean the cleaning roller 151 through the air blowing holes on its surface. During blowing, the reciprocating cylinder 154 drives the air blowing roller 152 to move back and forth along the bracket 155 through the fixed arm 153, which facilitates the blowing off of the residue on the cleaning roller 151.

[0045] In this embodiment, the drive roller 7 is positioned above the mating roller 8 and close to the cleaning roller 14, and the steel belt 5 is arranged in an "S" shape when it passes over the drive roller 7 and the mating roller 8.

[0046] In this embodiment, the transmission roller 7, the mating roller 8, the intermediate roller 9, and the lower pressure roller 10 are mounted on the inner side of the mounting frame 19 at both ends via bearing seats. The outer side of one end of the transmission roller 7 is also connected to the output shaft of the transmission motor 16 via a coupling. The transmission motor 16 is fixed on the outer side of the mounting frame 19.

[0047] In this embodiment, eight hot-pressing cylinders 3 are provided, of which four hot-pressing cylinders 3 form a group, and two groups of hot-pressing cylinders 3 are respectively fixed on both sides inside the frame body 2; the top of the hot-pressing cylinder 3 is movably connected to the frame body 2 through a rotating shaft.

[0048] By adopting the above technical solution, during pressing, the pressure of one set of hot pressing cylinders 3 is first adjusted to be greater than the pressure of the other set of hot pressing cylinders 3, so that the gas in the slab can be vented and the slab as a whole can be compacted; then the pressure parameters of each hot pressing cylinder 3 can be adjusted individually to achieve local pressurization and ensure that the density of the slab can be compacted.

[0049] In this embodiment, all of the aforementioned hot-press cylinders 3 are connected to the hydraulic station 4 via hydraulic pipes; the hydraulic station 4 is fixed to the top of the frame 2, and side guardrails are welded to both sides of the top of the hydraulic station 4 frame 2.

[0050] In this embodiment, a slag removal component 6 is provided on the side of the base 1 away from the mounting frame 19; the slag removal component 6 includes a slag collection box 61, and a slag scraper 62 is inclinedly provided on the top of the slag collection box 61, and the slag scraper 62 is attached to the steel strip 5; a slag collection box 63 is also provided inside the slag collection box 61.

[0051] A hot pressing method for producing fiberboard using a hot press includes the following steps:

[0052] Step 1: Feeding the fiberboard blank. The steel strip 5 at the upper end of the mounting frame 19 is the feeding area. After the flattened blank is placed on the steel strip 5, the drive motor 16 drives the drive roller 7 to rotate. With the cooperation of the mating roller 8, intermediate roller 9, lower pressure roller 10, transition roller 11 and edge roller 12, the steel strip 5 is driven to rotate. As the steel strip 5 rotates, the blank is transported to the bottom of the hot press plate 18; thus, the feeding of the blank is realized.

[0053] Step two, hot pressing of the slab: When the slab is below the hot pressing plate 18, multiple hot pressing cylinders 3 simultaneously push the hot pressing plate 18 to press the slab. The hot pressing plate 18 also dries and heats the colloid inside the slab to ensure that the slab is pressed into a sheet with a certain hardness. Since there are eight hot pressing cylinders 3, four of them form a group, and the two groups of hot pressing cylinders 3 are fixed on both sides inside the frame body 2, during pressing, the pressure of one group of hot pressing cylinders 3 is first adjusted to be greater than the pressure of the other group of hot pressing cylinders 3. This allows the gas in the slab to be vented, ensuring that the slab as a whole can be compacted. Then, the pressure parameters of each hot pressing cylinder 3 can be adjusted individually to achieve localized pressurization, ensuring that the density of the slab can be compacted. After all the hot pressing cylinders 3 are lifted, the transmission roller 7 drives the steel belt 5 to rotate, thereby removing the hot-pressed slab.

[0054] Step 3, cleaning the steel strip. Since the slab is made of a mixture of fiber powder and glue, a large amount of glue and residue will adhere to the steel strip 5 during hot pressing, which is difficult to clean over time. Therefore, when the steel strip 5 rotates to the residue scraper 62, the residue scraper 62 will scrape against the outer surface of the steel strip 5, and the residue will fall into the residue collection box 63 along the slag collection box 61. After the residue collection box 63 is pulled out, it is convenient for the unified treatment and recycling of the residue.

[0055] Step four, cleaning of the steel belt: Since the residue scraper 62 only scrapes off a large amount of residue, some small impurities will still adhere to the outer surface of the steel belt 5, and there will be fine dust on the inner side of the steel belt 5. To prevent slippage during transmission, when the steel belt 5 rotates to the cleaning roller 14, a simple cleaning can be performed on the inner surface of the steel belt 5, improving the transmission effect of the steel belt 5. When the steel belt 5 rotates to the cleaning roller 151, the rotating motor drives the cleaning roller 151 to clean the outer surface of the steel belt 5, greatly improving the cleaning effect of the steel belt 5.

[0056] Step 5: Cleaning the cleaning roller. Since the cleaning roller 151 has several bristles on its outside, the residue removed will remain inside the bristles. Therefore, compressed air is used to blow and clean the cleaning roller 151. External compressed air enters the air blowing roller 152 and blows and cleans the cleaning roller 151 through the air blowing holes on its surface. During blowing, the reciprocating cylinder 154 drives the air blowing roller 152 to move back and forth along the bracket 155 through the fixed arm 153, so as to facilitate the blowing off of the residue on the cleaning roller 151.

[0057] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A hot press for producing fiberboard, characterized in that: The system includes a base (1), on which a frame body (2) is fixedly installed. A hot press cylinder (3) is installed inside the frame body (2), and a hot press plate (18) is fixed on the cylinder rod of the hot press cylinder (3). A steel strip (5) is installed below the hot press plate (18), which surrounds the base (1) and the frame body (2). A support platform (17) fixed to the base (1) is also installed on the steel strip (5). The steel strip (5) has its two ends wrapped around the edge roller (12) and the end roller (13), and the steel strip (5) is wrapped around the transmission roller (7), the mating roller (8), the intermediate roller (9), the pressure roller (10) and the transition roller (11) below. A cleaning roller (14) is provided above the intermediate roller (9) and is in contact with the inner side of the steel strip (5). A cleaning component (15) is provided on the outer side of the mating roller (8) and is in contact with the outer side of the steel strip (5). The hot press cylinder (3) is provided in eight parts, of which four hot press cylinders (3) are in a group, and the two groups of hot press cylinders (3) are respectively fixed on both sides inside the frame body (2); the top of the hot press cylinder (3) is movably connected to the frame body (2) through a rotating shaft; Multiple hot-press cylinders (3) are connected to the hydraulic station (4) via hydraulic pipes; the hydraulic station (4) is fixed to the top of the frame body (2), and side guardrails are welded on both sides of the top of the hydraulic station (4) and the frame body (2). A slag removal assembly (6) is provided on the side of the base (1) away from the mounting frame (19); the slag removal assembly (6) includes a slag collection box (61), and a slag scraper (62) is inclinedly provided on the top of the slag collection box (61), and the slag scraper (62) is attached to the steel strip (5); a slag collection box (63) is also provided inside the slag collection box (61). The cleaning assembly (15) includes a cleaning roller (151), which is externally connected to a rotary motor; an air blowing roller (152) is provided on one side of the cleaning roller (151), and the two ends of the air blowing roller (152) are slidably connected to the bracket (155); a fixing arm (153) is snapped into the lower part of one end of the air blowing roller (152), and the fixing arm (153) is fixed to the cylinder rod of the reciprocating cylinder (154); the reciprocating cylinder (154) is fixedly connected to the mounting bracket (19); One end of the air blowing roller (152) is connected to a compressed air source through an air pipe, and several air blowing holes are provided on the air blowing roller (152), with the air outlet opening facing the cleaning roller (151).

2. The hot press for producing fiberboard as described in claim 1, characterized in that: The drive roller (7) is positioned above the mating roller (8) and close to the cleaning roller (14). The steel strip (5) is arranged in an "S" shape when it passes over the drive roller (7) and the mating roller (8).

3. The hot press for producing fiberboard as described in claim 1, characterized in that: The drive roller (7), mating roller (8), intermediate roller (9) and lower pressure roller (10) are mounted on the inner side of the mounting frame (19) by bearings with seats at both ends. The outer side of one end of the drive roller (7) is also connected to the output shaft of the drive motor (16) by a coupling. The drive motor (16) is fixed on the outer side of the mounting frame (19).

4. A hot pressing method for producing fiberboard using a hot press, characterized in that: Includes the following steps: Step 1: Loading the fiberboard blank. The steel strip (5) at the top of the mounting frame (19) is the loading area. After the flattened blank is placed on the steel strip (5), the drive motor (16) drives the drive roller (7) to rotate. With the cooperation of the mating roller (8), the intermediate roller (9), the lower pressure roller (10), the transition roller (11), and the edge roller (12), the steel strip (5) is driven to rotate. As the steel strip (5) rotates, the blank is transported to the bottom of the hot press plate (18); thus, the loading of the blank is realized. Step 2, hot pressing of the slab. When the slab is below the hot pressing plate (18), multiple hot pressing cylinders (3) simultaneously push the hot pressing plate (18) to press the slab. The hot pressing plate (18) also dries and heats the colloid in the slab to ensure that the slab is pressed into a plate with a certain hardness. Since there are eight hot pressing cylinders (3), four of them are grouped together. The two groups of hot pressing cylinders (3) are fixed on both sides inside the frame body (2). During pressing, the pressure of one group of hot pressing cylinders (3) is first adjusted to be greater than that of the other group of hot pressing cylinders (3). In this way, the gas in the slab can be vented to ensure that the slab can be compacted. Then, the pressure parameters of each hot pressing cylinder (3) can be adjusted individually to achieve local pressurization and ensure that the density of the slab can be compacted. After all the hot pressing cylinders (3) are lifted, the transmission roller (7) drives the steel belt (5) to rotate, thereby taking out the hot-pressed slab. Step 3, cleaning the steel strip. Since the slab is made of a mixture of fiber powder and glue, a lot of glue and residue will adhere to the steel strip (5) during hot pressing. It is difficult to clean over a long period of time. Therefore, when the steel strip (5) rotates to the residue scraper (62), the residue scraper (62) will scrape against the outer surface of the steel strip (5). The residue will fall into the residue collection box (63) along the slag collection box (61). After the residue collection box (63) is pulled out, it is convenient for the unified treatment and recycling of the residue. Step four, cleaning the steel belt. Since the scraper (62) only scrapes off a large amount of residue, some small impurities will still adhere to the outer surface of the steel belt (5), and there will be fine dust on the inner side of the steel belt (5). In order to prevent slippage during transmission, when the steel belt (5) rotates to the cleaning roller (14), a simple cleaning can be performed on the inner surface of the steel belt (5), which improves the transmission effect of the steel belt (5). When the steel belt (5) rotates to the cleaning roller (151), the rotating motor drives the cleaning roller (151) to clean the outer surface of the steel belt (5), which greatly improves the cleaning effect of the steel belt (5). Step 5, cleaning the cleaning roller. Since the cleaning roller (151) has several bristles on the outside, the residue will remain in the bristles. Therefore, compressed air is used to blow and clean the cleaning roller (151). External compressed air enters the air blowing roller (152) and blows and cleans the cleaning roller (151) through the air blowing holes on its surface. During blowing, the reciprocating cylinder (154) drives the air blowing roller (152) to move back and forth along the bracket (155) through the fixed arm (153), so as to facilitate the blowing off of the residue on the cleaning roller (151).

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