A pressurizing mechanism for high-strength rock wool fiber board, a production line and a production method

Abstract

The application discloses a kind of high-strength rock wool fiberboard pressurizing mechanism, production line and production method, the pressurizing mechanism includes pre-pressing unit and hot-pressing unit, the pre-pressing unit uses two-stage exhaust, can in the air of plate blank is discharged quickly while guarantee the quality of plate blank, avoid the impact of gas on plate blank when fast exhaust, cause the local defect of plate blank;The hot-pressing unit uses hot air to heat plate blank, improves heat transfer efficiency, improves production efficiency, reduces the power consumption of product, reduces production cost;And the sealing structure arranged therein, not only can prevent most hot gas from leaking, guarantee heat transfer efficiency, but also can carry out dehumidification treatment;The production line is high in degree of automation, rock wool fiberboard is produced using the production line, greatly improves production efficiency, reduces production cost, and is friendly to environment;Rock wool fiberboard prepared from rock wool fiber in the application has high mechanical strength, and bending strength is greater than or equal to 30MPa.

Description

[Technical Field]

[0001] This invention relates to the field of rock wool production technology, specifically to a pressure mechanism, production line, and production method for high-strength rock wool fiberboard. [Background Technology]

[0002] Rock wool fiber refers to cotton-like, discontinuous inorganic fibers produced by melting and centrifugation from industrial waste or natural rock minerals. Rock wool fibers exhibit good chemical stability, resulting in excellent dimensional stability, very low expansion, and good mechanical properties. Its pressed boards also possess good waterproof and water-repellent properties. Furthermore, rock wool fiber products do not contain toxic or carcinogenic components such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs), or asbestos, and their radioactivity and free aldehyde content meet relevant standards. Unlike organic insulation materials, rock wool fibers have a predominantly open-pore structure, providing excellent air permeability and sound absorption. These properties make rock wool fiberboard widely used in building exterior wall insulation, sound absorption, and fireproofing. In the event of a fire, it does not spread flames, release toxic gases, or produce burning droplets, posing no fire hazard. The high melting temperature of rock wool fibers prevents cracking and shrinkage during a fire, effectively inhibiting the spread of fire.

[0003] Currently, rock wool fiberboard requires pre-compression and hot-pressing during production. In existing technologies, air cannot be effectively expelled from the board during pre-compression, causing deformation during transportation and hot-pressing. During hot-pressing, most existing hot-pressing devices use thermal oil furnaces, which transfer the heat from natural gas combustion to the thermal oil before entering the equipment for heating. The heat transfer efficiency is only 60-80%, resulting in low heat utilization, high production costs, and low production efficiency.

[0004] The strength parameters of rock wool boards used for external wall insulation mainly assess tensile strength and compressive strength to ensure stable anchoring during use. However, no requirements are made for bending strength. If the bending strength is poor, the flatness of the wall decoration after renovation cannot be guaranteed.

[0005] For example, the published patent "A Method for Preparing Composite Reinforced Rock Wool Board" (application number: CN202210913198.7) uses an online curing and drying process, where the rock wool is dried and cured under pressure and ventilation airflow from the upper and lower chain plates of a curing furnace to obtain a composite reinforced rock wool board. However, the existing chain plate structure does not allow for smooth hot air entry, resulting in uneven heating of the rock wool between the upper and lower chain plates. Furthermore, the rock wool is prone to slipping during transport, causing local wrinkles, which affects product quality. In addition, the chain plate structure limits the upper limit of the applied pressure, preventing further improvement in the strength of the rock wool fiber board. Moreover, the current production process for rock wool fiber boards is relatively outdated, with low production efficiency and a lack of comprehensive dust collection and flue gas treatment facilities, easily leading to fugitive emissions of flue gas and VOCs, polluting the environment. In addition, the mechanical strength of the rock wool fiber boards prepared by the current process is relatively poor. Therefore, it is urgent to provide a new production solution for rock wool fiber boards. [Summary of the Invention]

[0006] To overcome the shortcomings of existing technologies, this invention provides a pressure mechanism, production line, and production method for rock wool fiberboard. This equipment and method offer high production efficiency and low cost, resulting in smaller fiber diameters and rock wool fiberboard products with higher flexural strength and elastic modulus, exhibiting performance far superior to existing products. To achieve the above objectives, this invention adopts the following technical solution:

[0007] A first aspect of the present invention is to provide a pressurizing mechanism for rock wool fiberboard, comprising a pre-pressing unit and a hot-pressing unit connected to each other;

[0008] The pre-compression unit includes a lower fixed frame and, from front to back, equipment for a primary exhaust section, equipment for a secondary exhaust section, and equipment for a heavy pre-compression section, all arranged sequentially on the lower fixed frame. The lower fixed frame is equipped with a conveying structure. The equipment for the primary exhaust section includes a front exhaust frame and a front transmission structure positioned above the lower fixed frame, with a front exhaust mesh belt mounted on the front transmission structure. The equipment for the secondary exhaust section and the heavy pre-compression section includes a rear exhaust pre-compression frame positioned above the lower fixed frame, with an upper conveyor mesh belt mounted on the rear exhaust pre-compression frame and a lower conveyor mesh belt positioned below the upper conveyor mesh belt. Both the upper and lower conveyor mesh belts contain several sets of rollers, and the spacing between the rollers in the secondary exhaust section is greater than the spacing between the rollers in the heavy pre-compression section.

[0009] The hot pressing unit includes a chassis and a heating mechanism located below the chassis. A feed inlet and a discharge outlet are respectively provided at both ends of the chassis along its length. An air inlet connected to hot air is provided at the bottom of the chassis, and an air outlet is provided on the side. A feeding structure and a flat pressing structure are provided inside the chassis. The feeding structure includes an upper conveyor plate located above the chassis and a lower conveyor plate located below it. The upper and lower conveyor plates are driven to rotate and tensioned at both ends along their length by a drive wheel and a driven wheel, respectively. The flat pressing structure includes an upper pressure plate located within the upper conveyor plate and a lower pressure plate located within the lower conveyor plate. A pressure cylinder is provided below the lower pressure plate. Hot air passages are evenly distributed on both the upper and lower pressure plates.

[0010] Preferably, a telescopic structure is provided at the end of the front exhaust frame away from the secondary exhaust section, and the end closer to the secondary exhaust section is rotatably connected to the rear exhaust pre-compression frame. The distance between the end of the front exhaust frame away from the secondary exhaust section and the lower fixed frame is adjusted by the telescopic structure.

[0011] Preferably, the front drive structure includes a drive roller and a driven roller disposed at the bottom of the front exhaust frame, and two guide rollers disposed above and between the drive roller and the driven roller; the front exhaust mesh belt is disposed on the drive roller, the driven roller and the guide roller of the front drive structure.

[0012] Preferably, the front exhaust frame is further provided with a tensioning structure, which includes a tensioning roller disposed between two guide rollers. The tensioning roller is movably connected to the front exhaust frame through a second telescopic structure and is used to adjust the tension of the front exhaust mesh belt.

[0013] Preferably, a lifting structure is provided on the pre-compression frame body at the corresponding rear exhaust pre-compression frame body. The extension and retraction of the lifting structure is used to drive the lifting and retraction of the rear exhaust pre-compression frame body, thereby adjusting the distance between the upper conveyor belt and the lower conveyor belt.

[0014] Preferably, the upper conveyor mesh plate and the upper pressure plate are inclined upward at the ends near the feed inlet, and the lower conveyor mesh plate and the lower pressure plate are inclined downward at the ends near the feed inlet, so that the upper conveyor mesh plate and the lower conveyor mesh plate, as well as the upper pressure plate and the lower pressure plate, form a funnel shape near the feed inlet, which facilitates feeding.

[0015] Preferably, rolling structures are provided between the upper and lower pressure plates and the adjacent conveyor mesh plates on their opposite surfaces, preferably a plurality of bearing roller structures, so that they roll into contact with the mesh plates during the pressurization process, thereby reducing friction.

[0016] Preferably, the chassis is further provided with a sealing structure, which is vertically arranged at both ends of the upper and lower pressure plates along their length to concentrate hot air at the pressurization mechanism and reduce heat loss.

[0017] Preferably, the sealing structure includes a fixing plate fixedly connected to the inner side wall of the chassis, and a flexible structure is provided at one end of the fixing plate near the conveyor mesh plate. The flexible structure contacts the conveyor mesh plate to reduce wear.

[0018] Preferably, the flexible structure is connected to the fixed plate via a connecting plate, and the flexible structure is selected from steel wire bundles, copper wire bundles, etc.

[0019] Preferably, the fixing plate is provided with an elongated hole, and the connecting plate is connected to the elongated hole by bolts, so that its relative position with the fixing plate is adjustable. When the flexible structure is worn, its relative position with the fixing plate can be adjusted to ensure close contact with the conveyor mesh and ensure a sealing effect.

[0020] Preferably, the top of both ends of the chassis is provided with a gas collection hood. The gas collection hood is connected to the flue gas treatment device through a pipe. The hot gas with high humidity discharged through the flexible structure or material slab is collected by the gas collection hood and then enters the flue gas treatment device for treatment under the centrifugal action of the fan before being discharged.

[0021] A second aspect of the present invention is to provide a rock wool fiberboard production line containing the above-mentioned pressurizing mechanism.

[0022] Furthermore, the rock wool fiberboard production line includes an unpacking mechanism, a fiber unwinding mechanism, an air separation mechanism, an automatic weighing mechanism, a glue spraying mechanism, a laying mechanism, a pressurizing mechanism, a cutting mechanism, a cooling mechanism, a surface treatment mechanism, a stacking mechanism, and an edge trimming mechanism, which are connected in sequence by a conveying mechanism.

[0023] Preferably, both the fiber unwinding mechanism and the paving mechanism are equipped with a gas collection structure. The gas collection structure is connected to the flue gas treatment system through a pipeline to treat the flue gas generated at the fiber unwinding mechanism and the paving mechanism before discharging it, thus avoiding direct emission and environmental pollution.

[0024] Preferably, a purification mechanism is provided between the air separation mechanism and the automatic weighing mechanism. The purification mechanism is selected from a bag filter dust collector and is used to remove the air volume during the air separation process.

[0025] Preferably, an edge trimming mechanism is also provided between the paving mechanism and the pressurizing mechanism to trim the uneven parts on both sides.

[0026] Preferably, the automatic weighing mechanism is a sealed belt scale.

[0027] Preferably, a dust collection pipe is provided at the cutting mechanism and the surface treatment mechanism, and the dust collection pipe is connected to a bag filter to collect and treat the dust generated during surface treatment.

[0028] National standards stipulate that the average fiber diameter should not exceed 6μm. The inventors discovered in their research that conventional fiberboard uses fibers with a diameter of 5μm, resulting in a flexural strength of 15–25 MPa. This invention improves equipment, production lines, and processes by adding air classifiers and baghouse dust collectors to select 3–4μm fibers. Furthermore, a new structural design for the subsequent air-heat curing equipment allows for increased applied pressure, thereby achieving a flexural strength of the fiberboard exceeding 30 MPa.

[0029] In the pressurizing mechanism, the pressurizing process and the mesh conveying are carried out simultaneously. Because this product is a high-strength rock wool fiberboard with a bending strength of 30MPa, the product cannot achieve such high strength when directly pressurized with a mesh. For example, the strength of normal rock wool boards pressurized with a mesh is around 100KPa. External force must be applied to the mesh. Numerous bearing rollers are installed at the contact points between the upper and lower pressure plates of the hot press plate and the conveying mesh to prevent the hot press plate from squeezing the mesh during pressurization, thus ensuring smooth movement of the mesh.

[0030] A third aspect of the present invention is to provide a method for producing rock wool fiberboard using the above-mentioned production line, specifically comprising the following steps:

[0031] (1) Unpacking and fiber removal: The prepared rock wool boards are unpacked using an unpacking machine. The unpacked rock wool boards are then crushed and de-fired to obtain rock wool fibers.

[0032] (2) Air separation: Rock wool fibers enter the air separation mechanism to remove heavy fiber bundles and impurities from the rock wool fibers. The unqualified rock wool fibers are sent to the furnace for recycling, while the qualified rock wool fibers are collected by the bag dust collector and sent to the automatic weighing mechanism.

[0033] (3) Automatic weighing: Adjust the speed of the belt scale according to the production line output so that the rock wool fiber forms a uniform cotton layer on the belt scale.

[0034] (5) Spraying adhesive and laying: After spraying adhesive on the uniform cotton layer, it is laid in the laying machine to form a fiber layer of a certain thickness on the laying machine.

[0035] (6) Edge trimming: The fiber layer enters the edge trimming mechanism to trim the uneven parts on both sides;

[0036] (7) Pressurization treatment: Pre-pressurization is carried out using a pre-pressurization unit to form a rock wool fiber board blank of a certain thickness, and then it enters the hot pressing device for heating and pressurization treatment;

[0037] (8) Cutting, cooling and surface treatment: The fiberboard enters the edge cutting machine to remove the uneven parts on both sides; then it enters the cross-cutting saw to cut the board into the length required by the customer; then the board enters the cooling machine to cool the board by the fan; after cooling, the board is sanded and coated with a cross-section agent to improve its appearance. The main processes in this process are cutting and surface sanding. The dust generated in the process is treated by a bag dust collector and the fiber dust is recycled.

[0038] (9) Stacking and trimming: The surface-treated fiberboard enters the stacking mechanism for initial stacking and then enters the trimming mechanism for further trimming to form a board with uniform size.

[0039] (10) Inspection and packaging: Products that pass manual inspection are packaged in a packaging machine, and unqualified products are recycled.

[0040] Preferably, the rock wool fiber diameter in the rock wool board is 3-4 μm.

[0041] Preferably, the diameter of the fibers screened by air separation in step (2) is 3 to 4 μm. Rock wool fiberboard made from rock wool fibers in this range has excellent mechanical properties.

[0042] Preferably, the pre-pressing pressure in step (7) is 0 to 50 bar; the hot-pressing pressure is 50 to 100 bar; and the hot-pressing temperature is 150 to 250°C.

[0043] The pre-compression unit of the rock wool fiberboard pressurization mechanism of the present invention adopts a two-stage exhaust system, which can quickly expel air from the board while ensuring the quality of the board. This avoids the problems of excessively fast exhaust speed in conventional production lines, which can lead to internal air bubbles not being expelled or accumulating and bursting, easily causing defects such as low density or uneven shape of the finished board. The impact of gas on the board during rapid exhaust can also cause local defects in the board. In addition, the heavy-duty pre-compression section can effectively compact the board, expel air from the board, improve the strength of the board, and enable the board to meet the production process requirements of the subsequent hot pressing unit.

[0044] The hot pressing unit in the pressurizing mechanism for rock wool fiberboard of the present invention uses hot air to directly act on the material board blank, which improves heat transfer efficiency, improves production efficiency, reduces the power consumption per unit of the product, and reduces production costs.

[0045] The sealing structure in the hot pressing unit of the present invention can play a good sealing role, prevent most of the hot air from leaking out, and ensure heat transfer efficiency; and the flexible structure can discharge some of the hot air for dehumidification.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The hot pressing unit of the present invention provides a new pressurization mechanism, which uses a conveyor belt, a conveyor plate, and a perforated pressure plate to achieve a ventilation effect, effectively expelling air from the slab and ensuring that the rock wool board inside the hot pressing unit is heated evenly. This not only ensures the uniformity of product quality but also prevents the slab from deforming during transportation and hot pressing.

[0048] 2. The mechanical pressure of the hot pressing unit described in this invention can reach 200 kg, which is a large pressure. The surfaces of the upper and lower pressure plates are in rolling contact with the upper and lower conveyor mesh plates through a rolling structure, which reduces friction and does not affect the transmission of the slab during pressurization.

[0049] 3. The pressurizing mechanism and production line provided by the present invention allow for greater hot pressing pressure. Through mechanical high pressure, the porosity inside the board is reduced and the density of the board is increased, thereby producing rock wool fiberboard with high mechanical strength and bending strength ≥30MPa.

[0050] 4. The production line of the present invention has a high degree of automation. The hot pressing unit uses hot air to heat the slab. The production line produces rock wool fiberboard, which improves heat transfer efficiency, increases production efficiency, reduces the power consumption per unit of the product, reduces production costs, and is environmentally friendly. [Attached Image Description]

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the pre-compression unit described in this invention;

[0053] Figure 2 This is a schematic diagram of the structure of the hot pressing unit described in this invention;

[0054] Figure 3 This is a schematic diagram of a portion of the sealing structure in the hot-pressing unit described in this invention;

[0055] Figure 4 This is a flowchart of the production method described in Embodiment 3 of the present invention;

[0056] Wherein: 1-Pre-compression unit; 101-Lower fixed frame; 102-Front exhaust frame; 1021-Telescopic structure; 103-Front exhaust mesh belt; 1031-Guide roller; 1032-Tension roller; 104-Rear exhaust pre-compression frame; 105-Upper conveyor mesh belt; 106-Lower conveyor mesh belt; 107-Roller; 108-Lifting structure;

[0057] 2-Hot pressing unit; 201-Chassis; 2011-Feed inlet; 2012-Discharge outlet; 2013-Air inlet; 2014-Air outlet; 202-Feeding structure; 2021-Upper conveyor mesh plate; 2022-Lower conveyor mesh plate; 2023-Drive wheel; 2024-Passive wheel; 203-Flat pressing structure; 2031-Upper pressure plate; 2032-Lower pressure plate; 2033-Pressure cylinder; 204-Sealing structure; 2041-Fixing plate; 2042-Flexible structure; 2043-Connecting plate; 205-Air collection hood; 3-Slab.

Detailed Implementation Methods

[0058] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0059] Example 1

[0060] This invention provides a pressure mechanism for rock wool fiberboard, comprising, as follows: Figure 1 The pre-compression unit 1 shown and as follows Figure 2 The hot pressing unit 2 shown is connected to the pre-pressing unit 1 via a conveyor belt.

[0061] like Figure 1 As shown, the pre-compression unit 1 includes a lower fixed frame 101 and equipment arranged sequentially from front to back on the lower fixed frame 101, which are respectively located in the primary exhaust section, the secondary exhaust section and the heavy pre-compression section. The lower fixed frame 101 is provided with a conveying structure such as rollers or belts to facilitate the rearward conveying of the billet.

[0062] The equipment for the initial exhaust section includes a front exhaust frame 102 disposed above the lower fixed frame 101 and a front transmission structure. The front transmission structure includes a drive roller and a driven roller disposed at the bottom of the front exhaust frame and two guide rollers 1031 disposed above and between the drive roller and the driven roller. The front exhaust mesh belt 103 is disposed on the drive roller, the driven roller and the guide roller of the front transmission structure.

[0063] In a preferred embodiment, a telescopic structure 1021 is provided at the end of the front exhaust frame 102 away from the secondary exhaust section, and the end near the secondary exhaust section is rotatably connected to the rear exhaust pre-compression frame 104. The lower end of the telescopic structure 1021 is fixed on the lower fixed frame 101, and the upper end is hinged to the front exhaust frame 102. The distance between the end of the front exhaust frame 102 away from the secondary exhaust section and the lower fixed frame 101 is adjusted by the telescopic structure 1021.

[0064] In a preferred embodiment, the front exhaust frame 102 is further provided with a tensioning structure, which includes a tensioning roller 1032 disposed between two guide rollers 1031. The tensioning roller 1032 is movably connected to the front exhaust frame 102 through a second telescopic structure. The upper end of the second telescopic structure is rotatably connected to the end of the tensioning roller 1032, and the lower end is fixedly connected to the front exhaust frame, for adjusting the tension of the front exhaust mesh belt 103.

[0065] The equipment for the secondary exhaust section and the heavy pre-compression section includes a rear exhaust pre-compression frame 104 installed above the lower fixed frame 101. An upper conveyor belt 105 is installed on the rear exhaust pre-compression frame 104, and a lower conveyor belt 106 is installed below the upper conveyor belt 105. Multiple sets of rollers 107 are installed in both the upper conveyor belt 105 and the lower conveyor belt 106. The spacing between the rollers 107 in the secondary exhaust section is greater than the spacing between the rollers in the heavy pre-compression section, which facilitates secondary exhaust and pressure application.

[0066] In a preferred embodiment, a lifting structure 108 is provided on the lower fixed frame 101 at the corresponding position of the rear exhaust pre-pressing frame 104. The lower end of the lifting structure 108 is fixed on the lower fixed frame 101, and the upper end is fixedly connected to the rear exhaust pre-pressing frame 104. The lifting structure 108 is used to extend and retract to drive the lifting and lowering of the rear exhaust pre-pressing frame, thereby adjusting the distance between the upper conveyor belt 105 and the lower conveyor belt 106, so as to ensure the thickness of the slab 3 entering the hot pressing unit and reduce the load on the hot pressing unit.

[0067] In this embodiment, the telescopic structure 1021, the second telescopic structure, and the lifting structure can be telescopic structures such as cylinders, hydraulic cylinders, and electric actuators.

[0068] like Figure 2 As shown, the hot pressing unit 2 includes a housing 201 and a heating mechanism located below the housing 201 (the heating mechanism is not shown in the figure, but a hot air furnace can be used);

[0069] The machine casing 201 has a feed inlet 2011 and a discharge outlet 2012 at both ends along its length. The bottom of the machine casing has an air inlet 2013 connected to the hot air furnace, and the side has an air outlet 2014. The machine casing is equipped with a feeding structure 202 and a flat pressure structure 203. The hot air furnace is connected to a burner that uses natural gas as fuel to provide hot air.

[0070] The feeding structure 202 includes an upper conveying mesh plate 2021 and a lower conveying mesh plate 2022 respectively disposed above the machine housing 201. The two ends of the upper conveying mesh plate 2021 and the lower conveying mesh plate 2022 in the length direction are driven to rotate and tensioned by a drive wheel 2023 and a driven wheel 2024 respectively.

[0071] The flat pressing structure 203 includes an upper pressure plate 2031 located within the upper conveyor mesh plate 2021 and a lower pressure plate 2032 located within the lower conveyor mesh plate 2022. A pressure cylinder 2033 is provided below the lower pressure plate 2032. Multiple pressure cylinders 2033 are vertically arranged, and their bottoms are fixedly connected to the machine housing 201 through a fixed structure. Their movable ends are fixedly connected to the bottom of the lower pressure plate 2032. Small holes are evenly distributed on the upper pressure plate 2031 and the lower pressure plate 2032 to facilitate the passage of hot air. The hot air generated by the heating mechanism enters the machine housing through the air inlet 2013, passes through the lower conveyor mesh plate 2022 and the lower pressure plate 2032 from bottom to top, acts on the material slab 3, and then passes through the upper conveyor mesh plate 2021 and the upper pressure plate 2031 before being discharged from the air outlet 2014 and returning to the heating mechanism for cyclic heating.

[0072] Preferably, the upper conveyor plate 2021 and the upper pressure plate 2031 are inclined upward at the ends near the feed inlet 2011, and the lower conveyor plate 2022 and the lower pressure plate 2032 are inclined downward at the ends near the feed inlet 2011, so that the upper conveyor plate 2021 and the lower conveyor plate 2022, as well as the upper pressure plate 2031 and the lower pressure plate 2032, form a funnel shape near the feed inlet, which facilitates feeding.

[0073] Preferably, the upper pressure plate 2031 and the lower pressure plate 2032 are respectively provided with a large number of bearing roller structures on their opposite surfaces, so that the pressure plate rolls in contact with the adjacent conveyor mesh plate during the pressurization process, and will not be squeezed with the conveyor mesh plate, thereby making the conveyor mesh plate move smoothly and the material blank is conveyed normally.

[0074] Preferably, the housing 201 is further provided with a sealing structure 204, which is vertically arranged at both ends of the upper pressure plate 2031 and the lower pressure plate 2032 along their length, concentrating hot air near the flat pressure structure 203 and reducing heat loss. In this embodiment, the sealing structure 204 includes a fixing plate 2041 fixedly connected to the inner wall of the housing 201. A flexible structure 2042 is provided at one end of the fixing plate 2041 near the conveyor mesh plate, and the flexible structure 2042 contacts the conveyor mesh plate.

[0075] like Figure 3 As shown, in this embodiment, the flexible structure 2042 is connected to the fixed plate 2041 through the connecting plate 2043. The flexible structure 2042 is selected from steel wire bundles, copper wire bundles, etc., which ensures the sealing effect while having air permeability, so that a small amount of hot air with high humidity can be discharged through the gaps between the steel wire bundles or copper wire bundles.

[0076] In this embodiment, the fixing plate 2041 is provided with an elongated hole, and the connecting plate 2043 is connected to the elongated hole by bolts, so that its relative position with the fixing plate 2041 is adjustable. When the flexible structure 2042 is worn, its relative position with the fixing plate 2041 can be adjusted to ensure close contact with the conveyor mesh and ensure a sealing effect.

[0077] Preferably, the top of both ends of the chassis 1 along its length is provided with a gas collection hood 205. The gas collection hood 205 is connected to a flue gas treatment device (not shown in the figure, in this embodiment selected as a wet electrostatic precipitator) through a pipe. The hot gas with high humidity discharged through the flexible structure or the material slab is collected by the gas collection hood and then enters the flue gas treatment device for treatment under the centrifugal action of the fan before being discharged.

[0078] Example 2

[0079] This embodiment provides a rock wool fiberboard production line containing the pressurizing mechanism described in Embodiment 1, as detailed below:

[0080] The rock wool production line includes, in sequence, a packing mechanism, a fiber unwinding mechanism, an air separation mechanism, an automatic weighing mechanism, a glue spraying mechanism, a laying mechanism, a pressurizing mechanism as described in Example 1, a cutting mechanism, a cooling mechanism, a surface treatment mechanism, a stacking mechanism, and an edge trimming mechanism, all connected by a conveying mechanism.

[0081] Preferably, both the fiber unwinding mechanism and the paving mechanism are equipped with a gas collection structure. The gas collection structure is connected to the flue gas treatment system through a pipeline to treat the flue gas generated at the fiber unwinding mechanism and the paving mechanism before discharging it, thus avoiding direct emission and environmental pollution.

[0082] Preferably, a purification mechanism is provided between the air separation mechanism and the automatic weighing mechanism. The purification mechanism is selected from a bag filter dust collector and is used to remove the air volume during the air separation process to prevent it from affecting the accuracy of the subsequent automatic weighing mechanism.

[0083] Preferably, an edge trimming mechanism is also provided between the paving mechanism and the pre-compression mechanism to trim the uneven parts on both sides.

[0084] Preferably, the automatic weighing mechanism is a sealed belt scale.

[0085] Preferably, the cutting mechanism and the surface treatment mechanism are equipped with bag filters to collect and treat the dust generated during surface treatment.

[0086] Example 3

[0087] like Figure 4 As shown, this embodiment provides a method for producing rock wool fiberboard using the production line described in Embodiment 2, specifically including the following steps:

[0088] (1) Unpacking and fiber removal: The prepared rock wool boards are unpacked using an unpacking mechanism. The unpacked rock wool boards are crushed and fiber removed to obtain rock wool fibers. The crusher and fiber remover are equipped with gas collection hoods, and the gas collection hoods are connected to the flue gas treatment device through pipes.

[0089] (2) Air classification: Rock wool fibers enter the air classification mechanism to remove heavy fiber bundles and impurities from the rock wool fibers. The unqualified rock wool fibers (fiber diameter greater than 4μm) are sent to the furnace for recycling. The qualified rock wool fibers (fiber diameter of 3-4μm) are collected by the bag dust collector. After the bag dust collector removes the air volume in the air classification process, the qualified rock wool fibers are sent to the automatic weighing mechanism.

[0090] (3) Automatic weighing: Adjust the speed of the belt scale according to the production line output so that the rock wool fiber forms a uniform cotton layer on the belt scale.

[0091] (5) Spraying adhesive and laying: The water-repellent agent, adhesive and silane are mixed and sprayed onto the uniform cotton layer before it is laid on the laying machine to form a fiber layer of a certain thickness. During this process, manual inspection is required. If it is qualified, continue to the next step; if it is unqualified, it is re-laid.

[0092] (6) Edge trimming: The laid fiber layer enters the edge trimming mechanism to trim the uneven parts on both sides.

[0093] (7) Pressing treatment: The pre-pressing unit 1 described in Example 1 is used to pre-press the trimmed fiber layer. The pre-pressing pressure is 0 to 50 bar to form a rock wool fiber board blank of a certain thickness. Then it enters the hot pressing unit 2 for flat pressing treatment. The hot pressing temperature is 150 to 250°C and the hot pressing pressure is 50 to 100 bar to form a rock wool fiber board with a certain density.

[0094] (8) Cutting, cooling and surface treatment: Rock wool fiberboard enters the edge cutting machine to remove the uneven parts on both sides; then it enters the cross-cutting saw to cut it into boards of the required length by the customer; then the boards enter the cooling mechanism to cool them down by the fan; after cooling, the boards are sanded and coated with a cross-section agent to improve their appearance. The main processes in this process are cutting and sanding. The dust generated in the process is treated by a bag filter and the fiber dust is recycled.

[0095] (9) Stacking and trimming: The surface-treated fiberboard enters the stacking mechanism for initial stacking and then enters the trimming mechanism for further trimming to form a board with uniform size.

[0096] (10) Inspection and packaging: Products that pass manual inspection are packaged in the packaging machine, and unqualified products are recycled and reused after being crushed a second time by the edge crusher.

[0097] The rock wool fiberboard with a thickness of 6-25 mm produced according to the method described in this embodiment has a fire performance of Class A non-combustible and a linear expansion coefficient of 10.5 × 10⁻⁶. -3 The flexural strength is above 30MPa at / ℃, and the elastic modulus is 3.06-4.74G, which is far superior to existing products. Moreover, this method has high production efficiency and low production cost, and has good application and promotion effects.

[0098] The embodiments described above are merely illustrative of certain implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A pressure mechanism for high-strength rock wool fiberboard, characterized in that, Includes interconnected pre-compression and hot-compression units; The pre-compression unit includes a lower fixed frame and, from front to back, equipment for a primary exhaust section, equipment for a secondary exhaust section, and equipment for a heavy pre-compression section, all arranged sequentially on the lower fixed frame. The lower fixed frame is equipped with a conveying structure. The equipment for the primary exhaust section includes a front exhaust frame and a front transmission structure positioned above the lower fixed frame, with a front exhaust mesh belt mounted on the front transmission structure. A telescopic structure is located at the end of the front exhaust frame furthest from the secondary exhaust section, and the end closest to the secondary exhaust section is rotatably connected to the rear exhaust pre-compression frame. The equipment for the secondary exhaust section and the heavy pre-compression section includes a rear exhaust pre-compression frame positioned above the lower fixed frame, with an upper conveyor mesh belt mounted on the rear exhaust pre-compression frame and a lower conveyor mesh belt positioned below it. Both the upper and lower conveyor mesh belts contain several sets of rollers, and the spacing between the rollers in the secondary exhaust section is greater than the spacing between the rollers in the heavy pre-compression section. The hot pressing unit includes a chassis and a heating mechanism located below the chassis. A feed inlet and a discharge outlet are respectively provided at both ends of the chassis along its length. An air inlet connected to hot air is provided at the bottom of the chassis, and an air outlet is provided on the side. A feeding structure and a flat pressing structure are provided inside the chassis. The feeding structure includes an upper conveyor plate located above the chassis and a lower conveyor plate located below it. The upper and lower conveyor plates are driven and tensioned at both ends along their length by a drive wheel and a driven wheel, respectively. The flat pressing structure includes an upper pressure plate located within the upper conveyor plate and a lower pressure plate located within the lower conveyor plate. A pressure cylinder is provided below the lower pressure plate. Hot air passages are evenly distributed on both the upper and lower pressure plates. Rolling structures are respectively provided between the upper and lower pressure plates and adjacent conveyor plates on their opposite surfaces.

2. The pressure mechanism for high-strength rock wool fiberboard according to claim 1, characterized in that, A lifting structure is provided on the pre-compression frame and at the corresponding rear exhaust pre-compression frame.

3. The pressure mechanism for high-strength rock wool fiberboard according to claim 1, characterized in that, The upper conveyor mesh plate and the upper pressure plate are inclined upward at the ends near the feed inlet, while the lower conveyor mesh plate and the lower pressure plate are inclined downward at the ends near the feed inlet, so that the upper conveyor mesh plate and the lower conveyor mesh plate, as well as the upper pressure plate and the lower pressure plate, form a funnel shape at the ends near the feed inlet.

4. The pressure mechanism for high-strength rock wool fiberboard according to claim 1, characterized in that, The chassis is also equipped with a sealing structure, which is vertically installed at both ends of the upper and lower pressure plates along their length. It also includes a fixing plate that is fixedly connected to the inner side wall of the chassis, and the end of the fixing plate near the conveyor mesh plate is provided with a flexible structure.

5. The pressure mechanism for high-strength rock wool fiberboard according to claim 4, characterized in that, The flexible structure is connected to the fixed plate via a connecting plate. The fixed plate is provided with an elongated hole, and the connecting plate is connected to the elongated hole via bolts. The flexible structure is selected from steel wire bundles and copper wire bundles.

6. The pressure mechanism for high-strength rock wool fiberboard according to claim 4, characterized in that, The top of both ends of the chassis is equipped with a gas collection hood, which is connected to the flue gas treatment device through pipes.

7. A rock wool fiberboard production line, characterized in that, The device includes an unpacking mechanism, a fiber-removing mechanism, an air-separating mechanism, an automatic weighing mechanism, a glue-spraying mechanism, a laying mechanism, an edge-trimming mechanism, a pressurizing mechanism, a purification mechanism, a cutting mechanism, a cooling mechanism, a surface treatment mechanism, a stacking mechanism, and an edge-trimming mechanism, which are connected in sequence via a conveying mechanism. The pressurizing mechanism is the pressurizing mechanism for high-strength rock wool fiberboard as described in any one of claims 1 to 6.

8. The rock wool fiberboard production line according to claim 7, characterized in that, Both the fiber unwinding mechanism and the laying mechanism are equipped with air collection structures, which are connected to the flue gas treatment system via pipes; the cutting mechanism and the surface treatment mechanism are equipped with dust collection pipes, which are connected to bag filters.

9. A method for producing rock wool fiberboard using the rock wool fiberboard production line of claim 8, characterized in that, Includes the following steps: (1) Unpacking and fiber removal: The prepared rock wool boards are unpacked using an unpacking mechanism. The unpacked rock wool boards are then crushed and fiber removed to obtain rock wool fibers. (2) Air separation: Rock wool fibers enter the air separation mechanism to remove heavy fiber bundles and impurities from the rock wool fibers. The unqualified rock wool fibers screened out are sent to the furnace for recycling. Rock wool fibers with a fiber diameter of 3~4μm are collected by a bag dust collector and sent to an automatic weighing mechanism. (3) Automatic weighing: Adjust the speed of the belt scale according to the production line output so that the rock wool fiber forms a uniform cotton layer on the belt scale; (5) Spraying adhesive and laying: After spraying adhesive on the uniform cotton layer, it is laid in the laying machine to form a fiber layer of a certain thickness on the laying machine. During this process, manual inspection is required. If it is qualified, continue to the next step; if it is unqualified, it is re-laid. (6) Edge trimming: The fiber layer enters the edge trimming mechanism to trim the uneven parts on both sides; (7) Pressurization treatment: The pre-pressing unit is used to pre-press the rock wool fiber board blank of a certain thickness, and then it enters the hot pressing unit for heating and pressurization treatment; (8) Cutting, cooling and surface treatment: The fiberboard enters the edge cutting machine to remove the uneven parts on both sides; then it enters the cross-cutting saw to cut the board into the length required by the customer; then the board enters the cooling machine to cool the board by the fan; after cooling, the board is sanded and coated with a cross-section agent to beautify the appearance. The dust generated in the process is treated by a bag dust collector and the fiber dust is recycled. (9) Stacking and trimming: The surface-treated fiberboard enters the stacking mechanism for initial stacking and then enters the trimming mechanism for further trimming to form a board with uniform size. (10) Inspection and packaging: Products that pass manual inspection are packaged in the packaging machine, and unqualified products are recycled.

Images