CN114654556A - Environment-friendly medium density fiberboard fiber preheating combination process and production equipment thereof - Google Patents
Environment-friendly medium density fiberboard fiber preheating combination process and production equipment thereof Download PDFInfo
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- CN114654556A CN114654556A CN202210266315.5A CN202210266315A CN114654556A CN 114654556 A CN114654556 A CN 114654556A CN 202210266315 A CN202210266315 A CN 202210266315A CN 114654556 A CN114654556 A CN 114654556A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/08—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/16—Transporting the material from mat moulding stations to presses; Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
- B27N3/183—Forming the mat-edges, e.g. by cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses an environment-friendly medium density fiberboard fiber preheating combined process and production equipment thereof, belonging to the field of medium density fiberboard processing, and the environment-friendly medium density fiberboard fiber preheating combined process and the production equipment thereof comprise a bottom plate, wherein the top surface of the bottom plate is symmetrically and respectively and fixedly connected with two vertical plates, a conveyor belt is arranged between the vertical plates, a plurality of shells are fixedly connected onto the side walls of the conveyor belt, the top surfaces of the shells are fixedly connected with a fixed plate, a leakage net is arranged in a cavity of the fixed plate, the top surface of the leakage net is movably connected with a cover plate, the side walls of the fixed plate are provided with a driving mechanism, the front side wall and the rear side wall of the cover plate are respectively provided with two fixing mechanisms, the top surface of the bottom plate is fixedly connected with four support plates, the top surfaces of the support plates are fixedly connected with the same microwave heating box, and a steam injection heater is arranged on the top surface of the bottom plate, which is close to the left side, the invention can uniformly preheat the fiber board blank, so that the performance of the fiber board blank is better.
Description
Technical Field
The invention relates to the field of medium-density fiberboard processing, in particular to an environment-friendly medium-density fiberboard fiber preheating combination process and production equipment thereof.
Background
The medium density fiberboard is an artificial board made by using wood fibers or other plant fibers as raw materials, applying urea-formaldehyde resin or other suitable adhesives after smashing, fiber separation and drying, and then performing hot pressing.
Wherein, in the course of working the fibreboard, need carry out preheating treatment to the slab, thereby ensure the quality of finished plate, and preheating equipment among the prior art generally utilizes dry pipeline or cyclone to carry out the drying, when carrying out the preloading, the error appears easily in inside humidity, and when preheating, the slab can only be heated simultaneously, because the slab can not remove, so there is inhomogeneous scheduling problem of being heated, and traditional heating equipment is not convenient for carry out the multilayer heating to the slab, the inside and the surface property of slab can not obtain best effect, easily reduce the life of panel.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an environment-friendly fiber board fiber preheating combination process and production equipment thereof.
In order to solve the above problems, the present invention adopts the following technical solutions.
Fiber board fibre preheats combination technology and production facility in environmental protection, comprising a base plate, two risers of fixedly connected with are distinguished to bottom plate top surface front and back symmetry, install the conveyer belt between the riser, fixedly connected with a plurality of casing on the conveyer belt lateral wall, casing top surface fixedly connected with fixed plate, be provided with the hourglass net in the fixed plate cavity, leak net top surface swing joint and have the apron, be provided with actuating mechanism on the fixed plate lateral wall, the lateral wall is provided with two fixed establishment respectively around the apron, four backup pads of bottom plate top surface fixedly connected with, the same microwave heating case of backup pad top surface fixedly connected with, the bottom plate top surface is close to left side department and installs the jet-steam heater, lateral wall is provided with drive assembly before the jet-steam heater, jet-steam heater inner chamber top surface is provided with swing mechanism.
Further, actuating mechanism includes the pivot, pivot and casing front side wall swing joint, pivot front end fixedly connected with circular gear, the front side is two fixedly connected with rack between the riser, circular gear meshes with the rack mutually, the pivot rear end runs through the first bevel gear of casing and fixedly connected with, the meshing of first bevel gear right side has second bevel gear, second bevel gear right side wall fixedly connected with transmission shaft, the transmission shaft runs through the first sheave of casing and fixedly connected with, lateral wall fixedly connected with round axle respectively about the screen leakage, the round axle other end all with fixed plate swing joint, the right side the round axle runs through fixed plate and fixedly connected with second sheave, swing joint has same belt between first sheave and the second sheave.
Further, fixed establishment includes the connecting plate, the connecting plate all with apron fixed connection, the connecting plate is the U-shaped setting, equal swing joint has the inserted bar on the connecting plate lateral wall, the jack has all been seted up on the hourglass net lateral wall, the inserted bar runs through connecting plate and apron in proper order and rather than swing joint, inserted bar and jack swing joint, the equal fixedly connected with pull ring of the inserted bar other end, equal swing joint has the spring on the inserted bar lateral wall, the spring both ends respectively with connecting plate and inserted bar lateral wall fixed connection.
Further, transmission assembly includes the mounting panel, mounting panel and jet-steam heater lateral wall fixed connection, mounting panel top surface fixedly connected with motor, the reciprocal lead screw of fixedly connected with on the motor output shaft, swing joint has the swivel nut on the reciprocal lead screw lateral wall, swivel nut right side wall fixedly connected with drum, jet-steam heater lateral wall set up with drum assorted through-hole.
Further, the swing mechanism includes the diaphragm, drum and diaphragm fixed connection, a plurality of fly leaf of fixedly connected with on the diaphragm lateral wall, a plurality of logical groove has all been seted up to the fly leaf top surface, it all is provided with the standpipe to lead to the inslot, equal two round bars of symmetry fixedly connected with around the standpipe lateral wall, the round bar other end all with lead to groove lateral wall swing joint, the equal fixedly connected with nozzle in standpipe bottom, a plurality of locating plate of steam injection heater inner chamber top surface fixedly connected with, the standpipe lateral wall is close to the equal fixedly connected with horizontal pole of bottom department, the horizontal pole other end all with locating plate swing joint, the equal fixedly connected with hose in standpipe top, the multi-ported pipe is installed to steam injection heater top surface, the hose other end runs through the steam injection heater and is linked together with the multi-ported pipe.
Furthermore, the bottom surface of the fixed plate is fixedly connected with a limiting plate, and the transmission shaft penetrates through the limiting plate and is movably connected with the limiting plate.
Furthermore, the fixing plate is arranged in a U shape.
Furthermore, the nozzles are provided with a plurality of nozzles which are uniformly distributed.
Further, the length of the steam injection heater and the length of the microwave heating box are larger than that of the filter screen.
The environment-friendly medium density fiberboard fiber preheating combined process comprises the following steps of:
s1: the wood chips are washed by water, cooked and softened under pressure, and then separated into wood fibers through a hot grinding process;
s2: after the wood fiber is discharged from the opening of the hot mill, the wood fiber enters a drying link, and the sizing of the fiber is completed while the wood fiber is dried;
s3: paving the glued fibers into a plate blank by paving equipment according to the process requirement, wherein the water content of the formed plate blank is only 10-20%;
s4: according to the step S3, preheating the plate blank after the plate blank is manufactured, firstly preheating a microwave heating box for 100 seconds until the temperature reaches about 80 ℃, then heating the plate blank, wherein the microwave energy penetrates into the material and is instantly converted into heat energy to integrally heat the material, the pressure of the water vapor in the inner layer is suddenly increased to drive the water vapor to be discharged to the surface layer of the material, the migration direction of the vapor is from inside to outside, so that the plate blank is uniformly heated, and the water content of the plate blank heated by the microwave is about 8-14%;
s5: according to the step S5, the board blank heated by the microwave enters a steam-jet heater to steam and heat the board blank, so that the pre-cured layer is reduced, the surface density and pores of the board blank are better sealed, the coating performance of the board blank can be improved, and the water content of the board blank passing through the steam-jet heater can be reduced to about 7%;
s6: the formed plate blank enters a hot press for hot pressing, and becomes an MDF product after the technological processes of edge sawing, sanding and the like;
compared with the prior art, the invention has the advantages that:
(1) this technical scheme is through mutually supporting between steam injection heater, microwave heating case and the conveyer belt etc. and after the slab process steam injection heater, microwave heating case, the moisture content of slab can reduce to about 8% for panel performance after the shaping reaches the best, and panel inside has certain moisture content simultaneously, can avoid long-term use back panel to appear fracture, crooked scheduling problem.
(2) This technical scheme passes through mutually supporting between conveyer belt, casing, fixed plate and the actuating mechanism etc, and the conveyer belt is in the transport slab, and usable circular rack and pinion drives the slab rotation as a whole, when the slab moves to the steam injection heater, when the microwave heating incasement, steerable conveyer belt reciprocating motion for the slab stops to overturn the heating in steam injection heater, the microwave heating case, reaches slab even heating's effect, prevents that the slab local appearance from being heated inhomogeneous phenomenon.
(3) This technical scheme is through mutually supporting between steam injection heater, drive assembly and the swing mechanism etc. when the slab carries to steam injection heater inside, utilizes swing mechanism to make the reciprocal swing of a plurality of nozzle for the slab surface is heated evenly, reaches the heating state of ideal, reduces the pre-cured layer, better seals slab surface density and pore, can improve the coating performance of slab simultaneously.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the steam injection heater of the present invention;
FIG. 3 is a schematic structural view of a fixing mechanism according to the present invention;
FIG. 4 is a schematic view of the internal structure of the housing of the present invention;
FIG. 5 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 6 is an enlarged view of the invention at B in FIG. 2;
fig. 7 is an enlarged view of the invention at C in fig. 2.
The reference numbers in the figures illustrate:
1. a base plate; 2. a vertical plate; 3. a conveyor belt; 4. a housing; 5. a fixing plate; 6. a leakage net; 7. a cover plate; 8. a rotating shaft; 9. a circular gear; 10. a rack; 11. a first bevel gear; 12. a second bevel gear; 13. a drive shaft; 14. a first sheave; 15. a second sheave; 16. a belt; 17. a connecting plate; 18. inserting a rod; 19. a jack; 20. a pull ring; 21. a spring; 22. a support plate; 23. a microwave heating box; 24. a steam injection heater; 25. mounting a plate; 26. a motor; 27. a reciprocating screw rod; 28. a threaded sleeve; 29. a cylinder; 30. a through hole; 31. a transverse plate; 32. a movable plate; 33. a through groove; 34. a vertical tube; 35. a round bar; 36. a nozzle; 37. positioning a plate; 38. a cross bar; 39. a hose; 40. a multiway tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Example 1:
referring to fig. 1-7, the environment-friendly fiber board fiber preheating combination process and the production equipment thereof comprise a bottom plate 1, wherein the front and back of the top surface of the bottom plate 1 are symmetrically and respectively fixedly connected with two vertical plates 2, a conveyor belt 3 is arranged between the vertical plates 2, the side walls of the conveyor belt 3 are fixedly connected with a plurality of shells 4, the top surface of each shell 4 is fixedly connected with a fixing plate 5, the fixing plate 5 is arranged in a U shape, a leakage net 6 is arranged in the cavity of the fixing plate 5, the top surface of the leakage net 6 is movably connected with a cover plate 7, the side walls of the fixing plate 5 are provided with a driving mechanism, the front and back side walls of the cover plate 7 are respectively provided with two fixing mechanisms, the top surface of the bottom plate 1 is fixedly connected with four support plates 22, the top surfaces of the support plates 22 are fixedly connected with a same microwave heating box 23, a steam-spraying heater 24 is arranged at the position close to the left side of the top surface of the bottom plate 1, a transmission assembly is arranged on the front side wall of the steam-spraying heater 24, a swinging mechanism is arranged on the top surface of the inner cavity of the steam-spraying heater 24, the length of the steaming heater 24 and the microwave heating box 23 is greater than that of the sieve 6.
Through mutually supporting between steam injection heater 24, microwave heating case 23 and conveyer belt 3 etc. after the slab process steam injection heater 24, microwave heating case 23, the moisture content of slab can reduce to about 8% for panel performance after the shaping reaches the best, and panel inside has certain moisture content simultaneously, can avoid long-term use back panel to appear fracture, crooked scheduling problem.
Referring to fig. 1 and 5, the driving mechanism includes a rotating shaft 8, the rotating shaft 8 is movably connected with the front side wall of the casing 4, a circular gear 9 is fixedly connected with the front end of the rotating shaft 8, a rack 10 is fixedly connected between two risers 2 at the front side, the circular gear 9 is meshed with the rack 10, the rear end of the rotating shaft 8 penetrates through the casing 4 and is fixedly connected with a first bevel gear 11, a second bevel gear 12 is meshed with the right side of the first bevel gear 11, a transmission shaft 13 is fixedly connected with the right side wall of the second bevel gear 12, the transmission shaft 13 penetrates through the casing 4 and is fixedly connected with a first sheave 14, the left and right side walls of the screen 6 are respectively and fixedly connected with a circular shaft, the other end of the circular shaft is movably connected with the fixing plate 5, the right circular shaft penetrates through the fixing plate 5 and is fixedly connected with a second sheave 15, and a belt 16 is movably connected between the first sheave 14 and the second sheave 15.
Through conveyer belt 3, casing 4, mutually support between fixed plate 5 and the actuating mechanism etc, conveyer belt 3 is in the transport slab, but usable circular gear 9 rack 10 drives the slab rotation entirely, when the slab moves to the steam injection heater 24, when microwave heating case 23 is interior, 3 reciprocating motion of steerable conveyer belt for the slab stops to overturn in steam injection heater 24, microwave heating case 23 and heats, reach the effect of slab even heating, prevent that the local inhomogeneous phenomenon of being heated from appearing of slab.
Referring to fig. 1 and 3, the fixing mechanism includes a connecting plate 17, the connecting plate 17 is all fixedly connected with the cover plate 7, the connecting plate 17 is in a U-shaped configuration, all swing joints have inserting rods 18 on the side wall of the connecting plate 17, jacks 19 have all been opened on the side wall of the drain net 6, the inserting rods 18 sequentially penetrate through the connecting plate 17 and the cover plate 7 and are movably connected with the same, the inserting rods 18 are movably connected with the jacks 19, the other ends of the inserting rods 18 are fixedly connected with pull rings 20, the side wall of the inserting rods 18 is movably connected with springs 21, two ends of the springs 21 are respectively fixedly connected with the connecting plate 17 and the side wall of the inserting rods 18, the slab can be prevented from falling in the rotating process, meanwhile, gaps of the drain net 6 are large enough, heat can be rapidly introduced into the slab, and firmness of the slab can be effectively improved.
Referring to fig. 2 and 6, the transmission assembly includes a mounting plate 25, the mounting plate 25 is fixedly connected with the side wall of the steam-injection heater 24, the top surface of the mounting plate 25 is fixedly connected with a motor 26, an output shaft of the motor 26 is fixedly connected with a reciprocating screw rod 27, the side wall of the reciprocating screw rod 27 is movably connected with a threaded sleeve 28, the right side wall of the threaded sleeve 28 is fixedly connected with a cylinder 29, and the side wall of the steam-injection heater 24 is provided with a through hole 30 matched with the cylinder 29.
With reference to figure 2 of the drawings, fig. 7, the swing mechanism includes diaphragm 31, drum 29 and diaphragm 31 fixed connection, a plurality of fly leaf 32 of fixedly connected with on the diaphragm 31 lateral wall, a plurality of logical groove 33 has all been seted up to fly leaf 32 top surface, all be provided with standpipe 34 in leading to the groove 33, two round bars 35 of the equal fixedly connected with of the symmetry around the standpipe 34 lateral wall, the round bar 35 other end all with lead to groove 33 lateral wall swing joint, the equal fixedly connected with nozzle 36 in standpipe 34 bottom, nozzle 36 is provided with a plurality of and is the evenly distributed setting, a plurality of locating plate 37 of spray steaming heater 24 inner chamber top surface fixedly connected with, the standpipe 34 lateral wall is close to equal fixedly connected with horizontal pole 38 in equal bottom department of leading to groove, the horizontal pole 38 other end all with locating plate 37 swing joint, the equal fixedly connected with hose 39 in standpipe 34 top, the multi-pass tube 40 is installed to spray steaming heater 24 top surface, the hose 39 other end runs through spray steaming heater 24 and is linked together with multi-pass through 40.
Through mutually supporting between steam injection heater 24, drive assembly and swing mechanism etc. when the slab carries to steam injection heater 24 inside, utilize swing mechanism to make the reciprocal swing of a plurality of nozzle 36 for the slab surface is heated evenly, reaches the heating state of ideal, reduces the pre-cured layer, better seals slab surface density and pore, can improve the coating performance of slab simultaneously.
Referring to fig. 1 and 5, a limiting plate is fixedly connected to the bottom surface of the fixing plate 5, and the transmission shaft 13 penetrates through the limiting plate and is movably connected to the limiting plate, so that the transmission shaft 13 can be supported to increase stability.
The environment-friendly medium density fiberboard fiber preheating combined process comprises the following steps:
s1: the wood chips are washed by water, cooked and softened under pressure, and then separated into wood fibers through a hot grinding process;
s2: after the wood fiber is discharged from the opening of the hot mill, the wood fiber enters a drying link, and the sizing of the fiber is completed while the wood fiber is dried;
s3: paving the glued fibers into a plate blank by paving equipment according to the process requirement, wherein the water content of the formed plate blank is only 10-20%;
s4: according to the step S3, the slab needs to be preheated after being manufactured into the slab, the microwave heating box 23 is preheated for 100S, the temperature reaches about 80 ℃, then the slab is heated, the microwave energy penetrates into the material and is instantly converted into heat energy to enable the material to be integrally heated, the pressure of the steam in the inner layer rises suddenly to drive the steam to be discharged to the surface layer of the material, the migration direction of the steam is from inside to outside, so that the slab is uniformly heated, and the moisture content of the slab heated by the microwave is about 8% -14%;
s5: according to the step S5, the slab subjected to microwave heating enters the steam-jet heater 24, and is subjected to steam-jet heating, so that the pre-cured layer is reduced, the surface density and pores of the slab are better sealed, the coating performance of the slab can be improved, and the moisture content of the slab subjected to microwave heating by the steam-jet heater 24 can be reduced to about 7%;
s6: the formed plate blank enters a hot press for hot pressing, and becomes an MDF product after the technological processes of edge sawing, sanding and the like;
an important and most direct effect of the treatment of the slabs with microwaves is, among other things, that the temperature of the slab, in particular the core, is increased before entering the press. The direct result is a reduction in the temperature difference between the initial temperature and the curing temperature of the core.
When in use: firstly, an external pipeline is connected onto a multi-way pipe 40, then pre-pressed slabs are sequentially placed in a leakage net 6, then a pull ring 20 is pulled outwards to drive an insert rod 18 to move, a spring 21 is compressed, then a cover plate 7 is covered and the pull ring 20 is loosened, meanwhile, the insert rod 18 rebounds to be inserted into an insert hole 19, the cover plate 7 is fixed, the slabs are prevented from falling off when rotating, then a microwave heating box 23 is preheated for 100S to enable the internal temperature to reach about 80 degrees, then a conveyor belt 3 is started through an external power supply, the conveyor belt 3 drives a fixing plate 5 to move through a shell 4, the fixing plate 5 drives the slabs to move through the leakage net 6, the shell 4 simultaneously drives a circular gear 9 to move, the circular gear 9 is meshed with a rack 10 and drives a rotating shaft 8 to rotate, the rotating shaft 8 drives a first bevel gear 11 to rotate, the first bevel gear 11 is meshed with a second bevel gear 12 and drives a transmission shaft 13 to rotate, the transmission shaft 13 drives the first grooved pulley 14 to rotate, the first grooved pulley 14 drives the second grooved pulley 15 to rotate through the belt 16, the second grooved pulley 15 drives the slab to rotate through the round shaft, when the slab moves into the microwave heating box 23, the slab can be preheated, and the slab can be uniformly heated along with the rotation of the slab, when the slab moves into the steam-jet heater 24, the motor 26 is started through the external power supply, the output shaft of the motor 26 drives the reciprocating screw 27 to rotate, the reciprocating screw 27 drives the cylinder 29 to reciprocate through the screw sleeve 28, the cylinder 29 drives the movable plate 32 to move through the transverse plate 31, the movable plate 32 drives the nozzle 36 to swing through the transverse rod 38, the slab can be uniformly steam-jet operated, when the slab moves into the steam-jet heater 24 or the microwave heating box 23, the conveyor belt 3 can be controlled to rotate forward and backward, so that the slab stays in the steam-jet heater 24 or the microwave heating box 23 to be rotatably heated, the water content of the heated plate blank is controlled to be about 8 percent, thereby achieving the best use effect.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. Fine board fibre preheats combination production facility in environmental protection, including bottom plate (1), its characterized in that: the front and back of the top surface of the bottom plate (1) are respectively and fixedly connected with two vertical plates (2) symmetrically, a conveyor belt (3) is arranged between the vertical plates (2), the side wall of the conveyor belt (3) is fixedly connected with a plurality of shells (4), the top surface of each shell (4) is fixedly connected with a fixing plate (5), a leakage net (6) is arranged in a cavity of the fixing plate (5), the top surface of the leakage net (6) is movably connected with a cover plate (7), the side wall of the fixing plate (5) is provided with a driving mechanism, the front side wall and the back side wall of the cover plate (7) are respectively provided with two fixing mechanisms, the top surface of the bottom plate (1) is fixedly connected with four supporting plates (22), the top surfaces of the supporting plates (22) are fixedly connected with the same microwave heating box (23), the position, close to the left side, of the top surface of the bottom plate (1) is provided with a steam injection heater (24), and the front side wall of the steam injection heater (24) is provided with a transmission component, and a swinging mechanism is arranged on the top surface of the inner cavity of the steam-injection heater (24).
2. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 1, wherein: the driving mechanism comprises a rotating shaft (8), the rotating shaft (8) is movably connected with the front side wall of the shell (4), a circular gear (9) is fixedly connected with the front end of the rotating shaft (8), a rack (10) is fixedly connected between the two vertical plates (2) on the front side, the circular gear (9) is meshed with the rack (10), the rear end of the rotating shaft (8) penetrates through the shell (4) and is fixedly connected with a first bevel gear (11), a second bevel gear (12) is meshed on the right side of the first bevel gear (11), a transmission shaft (13) is fixedly connected with the right side wall of the second bevel gear (12), the transmission shaft (13) penetrates through the shell (4) and is fixedly connected with a first grooved pulley (14), the left side wall and the right side wall of the screen (6) are respectively and fixedly connected with a circular shaft, the other end of the circular shaft is movably connected with the fixing plate (5), the right side of the circular shaft penetrates through the fixing plate (5) and is fixedly connected with a second grooved pulley (15), the same belt (16) is movably connected between the first grooved wheel (14) and the second grooved wheel (15).
3. The apparatus for preheating and combining production of fiber boards in environmental protection as claimed in claim 1, wherein: fixing mechanism includes connecting plate (17), connecting plate (17) all with apron (7) fixed connection, connecting plate (17) are the U-shaped setting, equal swing joint has inserted bar (18) on connecting plate (17) lateral wall, jack (19) have all been seted up on hourglass net (6) lateral wall, inserted bar (18) run through connecting plate (17) and apron (7) in proper order and rather than swing joint, inserted bar (18) and jack (19) swing joint, the equal fixedly connected with pull ring (20) of inserted bar (18) other end, equal swing joint has spring (21) on inserted bar (18) lateral wall, spring (21) both ends respectively with connecting plate (17) and inserted bar (18) lateral wall fixed connection.
4. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 1, wherein: the transmission assembly comprises a mounting plate (25), the mounting plate (25) is fixedly connected with the side wall of the steam injection heater (24), the top surface of the mounting plate (25) is fixedly connected with a motor (26), a reciprocating screw rod (27) is fixedly connected to an output shaft of the motor (26), a threaded sleeve (28) is movably connected to the side wall of the reciprocating screw rod (27), a cylinder (29) is fixedly connected to the right side wall of the threaded sleeve (28), and a through hole (30) matched with the cylinder (29) is formed in the side wall of the steam injection heater (24).
5. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 4, wherein: the swing mechanism comprises a transverse plate (31), the cylinder (29) is fixedly connected with the transverse plate (31), a plurality of movable plates (32) are fixedly connected onto the side wall of the transverse plate (31), a plurality of through grooves (33) are formed in the top surface of each movable plate (32), vertical pipes (34) are arranged in the through grooves (33), two round rods (35) are symmetrically and fixedly connected with the front and back of the side wall of each vertical pipe (34), the other ends of the round rods (35) are movably connected with the side wall of the through grooves (33), nozzles (36) are fixedly connected with the bottom ends of the vertical pipes (34), a plurality of positioning plates (37) are fixedly connected onto the top surface of the inner cavity of the steam-injection heater (24), transverse rods (38) are fixedly connected at positions of the side wall of the vertical pipes (34) close to the bottom ends, the other ends of the transverse rods (38) are movably connected with the positioning plates (37), and hoses (39) are fixedly connected onto the top ends of the vertical pipes (34), the top surface of the steam-injection heater (24) is provided with a multi-way pipe (40), and the other end of the hose (39) penetrates through the steam-injection heater (24) and is communicated with the multi-way pipe (40).
6. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 1, wherein: the bottom surface of the fixed plate (5) is fixedly connected with a limiting plate, and the transmission shaft (13) penetrates through the limiting plate and is movably connected with the limiting plate.
7. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 1, wherein: the fixing plate (5) is arranged in a U shape.
8. The environmentally friendly medium density fiberboard fiber preheating assembly production apparatus of claim 1, wherein: the nozzles (36) are arranged in a plurality and are uniformly distributed.
9. The apparatus for preheating and combining production of fiber boards in environmental protection as claimed in claim 1, wherein: the length of the steam injection heater (24) and the length of the microwave heating box (23) are larger than that of the filter screen (6).
10. An environmentally friendly mid-fiber board fiber preheating combined process using the environmentally friendly mid-fiber board fiber preheating combined production apparatus of any one of claims 1 to 9, comprising the steps of:
s1: the wood chips are washed by water, cooked and softened under pressure, and then separated into wood fibers through a hot grinding process;
s2: after the wood fiber is discharged from the opening of the hot mill, the wood fiber enters a drying link, and the sizing of the fiber is completed while the wood fiber is dried;
s3: paving the glued fiber into a plate blank by paving equipment according to the process requirement, wherein the water content of the formed plate blank is only 10-20%;
s4: according to the step S3, the slab needs to be preheated after being manufactured into the slab, a microwave heating box (23) is preheated for 100S, the temperature reaches about 80 ℃, then the slab is heated, the microwave energy penetrates into the material and is instantly converted into heat energy to enable the material to be integrally heated, the pressure of the steam in the inner layer rises suddenly to drive the steam to be discharged to the surface layer of the material, the steam migration direction is from inside to outside, the slab is heated uniformly, and the moisture content of the slab heated by the microwave is about 8% -14%;
s5: according to the step S5, the board blank heated by the microwave enters a steam-jet heater (24) to steam and heat the board blank, so that the pre-cured layer is reduced, the surface density and pores of the board blank are better sealed, the coating performance of the board blank can be improved, and the water content of the board blank passing through the steam-jet heater (24) can be reduced to about 7%;
s6: and (3) putting the formed plate blank into a hot press for hot pressing, and performing the processes of edge sawing, sanding and the like to obtain the MDF product.
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