CN108145807B - Method for manufacturing multilayer board - Google Patents
Method for manufacturing multilayer board Download PDFInfo
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- CN108145807B CN108145807B CN201711367491.3A CN201711367491A CN108145807B CN 108145807 B CN108145807 B CN 108145807B CN 201711367491 A CN201711367491 A CN 201711367491A CN 108145807 B CN108145807 B CN 108145807B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
- B27D5/006—Trimming, chamfering or bevelling edgings, e.g. lists
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
Abstract
The invention belongs to the technical field of wood processing and treatment, and particularly discloses a method for manufacturing a multilayer board, which comprises the following steps: (1) cutting and drying; (2) splicing and repairing the dried single-layer plate; (3) glue mixing: adding 4.5-6 parts of ammonium chloride into 58-63 parts of phenolic resin binder, uniformly mixing, and then adding 30-35 parts of flour for mixing; (4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate; (5) and (3) laminating: cold pressing the bonded multi-layer splint at the pressure of 10-12mpa for 1.5-2 h; standing for 0.3-0.5min after cold pressing, and then carrying out hot pressing at the hot pressing pressure of 13-15mpa and the temperature of 108-; (6) and (3) after standing and curing for 2-3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of protective paint on the surface of the multilayer splint. The multilayer board produced by the method has good quality and is not easy to crack and deform.
Description
Technical Field
The invention belongs to the technical field of wood processing and treatment, and particularly relates to a manufacturing method of a multilayer board.
Background
In the decoration or wood door industry, the multilayer board is widely adopted, the existing multilayer boards almost have a common quality defect, the products are easy to deform and glue off, and the service life is short. In addition, in the process of producing the multilayer board, most of the glue solution contains components harmful to human bodies, and the glue solution is absorbed by people after volatilization and has adverse effects on human bodies. Through the further research to domestic, outer panel processing enterprise and product, discover to the demand grade of multiply wood along with people's standard of living's promotion, have had the low-grade product to middle-high grade, environmental protection type product transformation, consequently, the urgent need for an economy, practical novel, high-grade panel.
Disclosure of Invention
The invention aims to provide a method for manufacturing a multilayer board, and the obtained multilayer board has good quality and is not easy to crack and deform.
In order to achieve the purpose, the basic scheme of the invention is as follows: the manufacturing method of the multilayer board comprises the following steps:
(1) cutting and drying: cutting wood into single-layer boards with the thickness of 1.6-2.2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 2-3h when the single-layer boards are dried to the moisture content of 45-50%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 1.5-2h when the single-layer boards are dried to the moisture content of 18-25%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 5-8%;
(2) splicing and repairing the dried single-layer plate;
(3) glue mixing: adding 4.5-6 parts of ammonium chloride into 58-63 parts of phenolic resin binder, uniformly mixing, and then adding 30-35 parts of flour for mixing;
(4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate;
(5) and (3) laminating: cold pressing the bonded multi-layer splint at the pressure of 10-12mpa for 1.5-2 h; standing for 0.3-0.5min after cold pressing, and then carrying out hot pressing at the hot pressing pressure of 13-15mpa and the temperature of 108-;
(6) and (3) after standing and curing for 2-3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of protective paint on the surface of the multilayer splint.
The beneficial effect of this basic scheme lies in: when the wood is dried, the wood is dried for several times, so that the water content of the wood is reduced in a step shape, and the deformation of the wood caused by one-time long-term heating is avoided. Glue is mixed before gluing, added ammonium chloride is used as a curing agent, the drying speed of the glue can be accelerated, the utilization rate of the glue is improved, meanwhile, the content of toxic substances can be reduced through the glue solution components and the improvement of the glue mixing process, and the produced multilayer board is more environment-friendly and reliable. The pressfitting process, the hot repressing of colding pressing earlier to and improve the parameter of colding pressing, hot pressing, if improve cold pressure, hot pressing temperature etc. can effectively avoid multiple quality problems such as off-the-shelf "deformation", "split glue".
Further, the step (1) of cutting and drying: cutting wood into single-layer boards with the thickness of 2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 3 hours when the single-layer boards are dried to the moisture content of 45%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 2 hours when the single-layer boards are dried to the moisture content of 22%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 7%. Through a plurality of tests of the applicant, the drying parameters are controlled to be the values, and the obtained dried wood can keep a better shape and does not deform.
Further, the glue mixing in the step (3): 4.8 parts of ammonium chloride is added into 62 parts of phenolic resin binder, and 30 parts of flour is added after uniform mixing. Through a plurality of experiments of the applicant, the adhesive liquid prepared by the proportion has a good bonding effect.
Further, the step (5) is carried out in a pressing mode: carrying out cold pressing on the bonded multi-layer splint, wherein the cold pressing pressure is 12mpa, and the time is 1.8 h; and (3) standing for 0.5min after cold pressing, and then carrying out hot pressing at a hot pressing pressure of 13mpa and a temperature of 110 ℃ for 0.2 h. Through a plurality of tests of the applicant, the parameter is set to be within the range, and the pressing effect is good.
Further, in the step (6), the protective paint is a UV paint. The UV paint is different from PU paint, PE paint and NC paint which are commonly used by common furniture enterprises, is really green and environment-friendly paint, does not contain any volatile substance, and is green, healthy and environment-friendly in products produced by using the UV paint.
Further, the glue spreader in the step (4) comprises a glue solution pool, a glue spreading unit and a lifting unit for lifting the wood board below the glue spreading unit, wherein the glue spreading unit comprises a glue spreading cylinder with an opening at the lower end, a motor fixed on the upper surface of the glue spreading cylinder and a rotating plate positioned below the glue spreading cylinder, a pressing plate is connected in the glue spreading cylinder in a sliding manner, a threaded rod with the lower side positioned in the glue spreading cylinder is connected to an output shaft of the motor, the pressing plate is connected to the threaded rod in a threaded manner, and a limiting structure for limiting the rotation of the pressing plate is arranged; the lower end of the threaded rod is fixed on the rotating plate, the lower surface of the rotating plate is provided with a glue spreader capable of rotating automatically, the glue spreader is horizontally arranged, and the rotating plate is provided with a plurality of one-way glue outlet valves opposite to the glue spreader; a plurality of corrugated pipes with the same number as the one-way glue outlet valves are connected between the pressing plate and the rotating plate, and the corrugated pipes are opposite to the one-way glue outlet valves; the corrugated pipe is connected with a rubber inlet pipe, the inlet of the rubber inlet pipe is communicated with a rubber solution pool, and the rubber inlet pipe is provided with a one-way rubber inlet valve; the side wall of the upper side of the gluing cylinder is provided with a one-way air inlet valve and an exhaust pipe, and the exhaust pipe is provided with a one-way exhaust valve; an air passage and a plurality of branch air passages communicated with the air passage are arranged in the rotating plate, the discharge port of each branch air passage is positioned on the lower surface of the rotating plate, and the outlet of the exhaust pipe is communicated with the air passage.
Before gluing the wood board, the wood board is placed on the lifting unit, the lifting unit is driven to drive the wood board to move upwards until the wood board is contacted with the gluing cylinder, and the wood board is opposite to the rotating board. Starting a motor to enable the motor to rotate towards a fixed direction, driving a threaded rod to rotate by the motor, and rotating plates fixed at the lower end of the threaded rod to rotate along with the threaded rod; the motor passes through the threaded rod and drives the clamp plate upward movement, and the pressure increase on gluing section of thick bamboo upper portion this moment, one-way discharge valve opens, and the gas in the gluing section of thick bamboo loops through blast pipe, air flue, discharges from a gas flue at last, because the discharge port of a gas flue is located the lower surface of commentaries on classics board, blows on the surface of plank from a gas flue gas, can clear away the dust on plank surface. Meanwhile, the pressing plate stretches the corrugated pipe, the pressure in the corrugated pipe is reduced, the one-way glue inlet valve is opened, and glue in the glue solution tank is supplemented into the corrugated pipe through the glue inlet pipe. After dust on the surface of the wood board is removed, the motor is rotated reversely, the motor drives the press plate to move downwards, the pressure intensity of the upper part of the gluing cylinder is reduced at the moment, the one-way air inlet valve is opened, and external air is supplemented to the upper part of the gluing cylinder. And meanwhile, the pressing plate extrudes the corrugated pipe, the pressure in the corrugated pipe is increased, the one-way glue outlet valve is opened, glue solution in the corrugated pipe falls on the glue spreader through the one-way glue outlet valve, the glue spreader is arranged on the lower surface of the rotating plate, the rotating plate rotates to drive the glue spreader to move together, friction exists between the wood plate and the glue spreader due to the contact of the glue spreader and the wood plate, the glue spreader can rotate when the rotating plate drives the glue spreader to move, in the process, due to the continuous rotation of the glue spreader, the glue solution can fall on the surfaces of the glue spreader, and when the glue spreader performs gluing on the wood plate, the gluing uniformity is ensured.
The dust on the wood board is removed by using the gas generated by the upward extrusion gluing cylinder of the pressing plate, so that the cleaning by workers is not needed, and the labor intensity of the workers is reduced; meanwhile, the glue solution of the corrugated pipe is automatically supplemented, manual supplementation is not needed, and the working efficiency is greatly improved. The motor drives the glue spreader along with changeing the board pivoted while, the glue spreader can also the rotation, and the glue spreader can make the glue spreader carry out the rubber coating to each position on plank surface along with changeing the board rotation, and the glue spreader rotation enables the glue solution and falls in each surface of glue spreader, makes the plank can the adhesion glue solution, and the glue spreader rotation can reduce the frictional force between glue spreader and the plank simultaneously. In the gluing process, the glue solution in the corrugated pipe is extruded to the surface of the glue spreader in a little by little manner, so that the phenomena of waste and uneven spreading caused by excessive glue solution adhered to the glue spreader are avoided; and the power for extruding the glue solution is provided by the motor, and a power device is not required to be additionally arranged, so that the structure of the device can be simplified.
Furthermore, the lifting unit comprises an air cylinder and a clamping mechanism for fixing the wood board, the clamping mechanism comprises a rotating rod and two symmetrically arranged L-shaped plates, one end of the rotating rod is rotatably connected to one of the L-shaped plates, and the other end of the rotating rod is in threaded connection with the other L-shaped plate; the piston rod of the cylinder is fixed on one of the L-shaped plates. Before gluing the wood board, the wood board is placed on the two L-shaped plates, the rotating rod is screwed, the L-shaped plate connected with the rotating rod in a threaded mode moves towards one side of the wood board, when the two L-shaped plates are tightly attached to the two sides of the wood board respectively, the rotating rod stops being screwed, and the two L-shaped plates firmly clamp and fix the wood board at the moment. And operating the air cylinder to enable the air cylinder to drive the wood board to move upwards, and stopping operating the air cylinder when the wood board is contacted with the glue spreader. Because the relative position of the two L-shaped plates can be adjusted, the clamping mechanism can clamp various wood boards with different specifications, and the application range is wide.
Furthermore, the limiting structure is a limiting column fixed in the gluing cylinder, and the pressing plate is connected to the limiting column in a sliding mode. The rotation of clamp plate has been restricted in the setting of spacing post for the clamp plate can only follow the threaded rod up-and-down motion.
Further, a fixed shaft is fixed on the lower surface of the rotating plate, the glue coating roller is rotatably connected to the fixed shaft, the glue coating roller is connected with the rotating plate through the fixed shaft, and the rotating plate can drive the glue coating roller to move together when rotating; meanwhile, the glue spreader is connected to the fixed shaft in a rotating mode, so that the glue spreader can rotate, and the glue spreader can rotate while moving along with the rotating plate.
Drawings
Fig. 1 is a schematic view of the structure of a coater used in this embodiment.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
the reference numbers in figure 1 of the specification include: the glue coating device comprises a glue coating cylinder 10, a one-way air inlet valve 11, an exhaust pipe 12, a one-way exhaust valve 121, a limiting column 13, a glue solution pool 20, a glue inlet pipe 21, a one-way glue inlet valve 211, a motor 30, a threaded rod 31, a pressing plate 32, a corrugated pipe 321, a rotating plate 40, an air passage 41, a branch air passage 411, a one-way glue outlet valve 42, a fixed shaft 50, a glue coating roller 51, an air cylinder 60, a wood plate 70, an L-shaped plate 80 and a rotating rod.
Example 1
The manufacturing method of the multilayer board comprises the following steps:
(1) cutting and drying: cutting wood into single-layer boards with the thickness of 2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 3 hours when the single-layer boards are dried to the moisture content of 45%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 2 hours when the single-layer boards are dried to the moisture content of 22%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 7%;
(2) splicing and repairing the dried single-layer plate;
(3) glue mixing: adding 4.8 parts of ammonium chloride into 62 parts of phenolic resin binder, uniformly mixing, and then adding 30 parts of flour for mixing;
(4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate;
(5) and (3) laminating: carrying out cold pressing on the bonded multi-layer splint, wherein the cold pressing pressure is 12mpa, and the time is 1.8 h; standing for 0.5min after cold pressing, and then carrying out hot pressing at the temperature of 110 ℃ under the hot pressing pressure of 13mpa for 0.2 h;
(6) and (3) after standing and curing for 3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of UV paint on the surface of the multilayer splint.
As shown in fig. 1, the glue spreader used in this embodiment includes a glue solution tank 20, a glue spreading unit, and a lifting unit located below the glue spreading unit, wherein a stirring shaft for stirring the glue solution is provided in the glue solution tank 20; the glue solution in the glue solution pool 20 is easy to delaminate due to long-term stillness, the delamination of the glue solution affects the quality of the glue solution and the gluing effect, and the stirring shaft is arranged to stir the glue solution, so that the static delamination of the glue solution can be effectively prevented. The gluing unit comprises a motor 30, a gluing cylinder 10 with an opening at the lower end and a rotating plate 40 positioned below the gluing cylinder 10, the motor 30 is fixed on the upper surface of the gluing cylinder 10, an output shaft of the motor 30 is connected with a threaded rod 31 positioned in the gluing cylinder 10, and the lower end of the threaded rod 31 is fixed on the rotating plate 40. A pressing plate 32 is connected in the gluing barrel 10 in a sliding mode, the pressing plate 32 is connected to the threaded rod 31 in a threaded mode, a limiting column 13 is fixed in the gluing barrel 10, the limiting column 13 penetrates through the pressing plate 32, the limiting column 13 limits rotation of the pressing plate 32, and the pressing plate 32 can only move up and down along the threaded rod 31. The lower surface of commentaries on classics board 40 is fixed with fixed axle 50, rotates on fixed axle 50 to be connected with the glue spreader 51 that the level set up, and glue spreader 51 passes through fixed axle 50 to be connected with commentaries on classics board 40, changes board 40 and rotates and to drive glue spreader 51 and together move, simultaneously again because glue spreader 51 rotates to be connected on fixed axle 50 for glue spreader 51 can the rotation, guarantees that glue spreader 51 can take place the rotation again when changeing board 40 motion. The rotating plate 40 is provided with a plurality of one-way glue outlet valves 42 opposite to the glue spreading rollers 51; a plurality of corrugated pipes 321 are connected between the pressing plate 32 and the rotating plate 40, the number of the corrugated pipes 321 is the same as that of the one-way glue outlet valves 42, each corrugated pipe 321 is opposite to one-way glue outlet valve 42, and when the pressure in the corrugated pipes 321 is increased, the one-way glue outlet valves 42 can be automatically opened. The corrugated pipe 321 is connected with a rubber inlet pipe 21, the inlet of the rubber inlet pipe 21 is communicated with the bottom of the rubber liquid pool 20, the rubber inlet pipe 21 is provided with a one-way rubber inlet valve 211, when the pressure in the corrugated pipe 321 is reduced, the one-way rubber inlet valve 211 is opened, and the rubber liquid in the rubber liquid pool 20 can be supplemented into the corrugated pipe 321 through the rubber inlet pipe 21. The upper side wall of the gluing cylinder 10 is provided with a one-way air inlet valve 11 and an exhaust pipe 12, the exhaust pipe 12 is provided with a one-way exhaust valve 121, the one-way exhaust valve 121 can be automatically opened when the pressure in the upper part of the gluing cylinder 10 is increased, the one-way air inlet valve 11 can be automatically opened when the pressure in the upper part of the gluing cylinder 10 is reduced, and external gas can be supplemented into the upper part of the gluing cylinder 10. An air duct 41 and a plurality of branch air ducts 411 communicated with the air duct 41 are arranged in the rotating plate 40, discharge ports of the branch air ducts 411 are positioned on the lower surface of the rotating plate 40, and an outlet of the exhaust pipe 12 is communicated with the air duct 41.
The lifting unit comprises an air cylinder 60 and a clamping mechanism for fixing the wood board 70, the clamping mechanism comprises a rotating rod 81 and two L-shaped plates 80 which are symmetrically arranged, one end of the rotating rod 81 is rotatably connected to one L-shaped plate 80, and the other end of the rotating rod 81 is in threaded connection with the other L-shaped plate 80; the piston rod of the cylinder 60 is fixed to one of the L-shaped plates 80. Because the relative position of the two L-shaped plates 80 can be adjusted, the clamping mechanism can clamp wood boards 70 with different specifications, and the application range is wide.
Example 2
This example differs from example 1 in that:
the manufacturing method of the multilayer board comprises the following steps:
(1) cutting and drying: cutting wood into single-layer boards with the thickness of 2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 2.53 hours when the single-layer boards are dried to the moisture content of 48%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 1.8 hours when the single-layer boards are dried to the moisture content of 21%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 6%;
(2) splicing and repairing the dried single-layer plate;
(3) glue mixing: adding 5 parts of ammonium chloride into 63 parts of phenolic resin binder, uniformly mixing, and then adding 33 parts of flour for mixing;
(4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate;
(5) and (3) laminating: carrying out cold pressing on the bonded multi-layer splint, wherein the cold pressing pressure is 12mpa, and the time is 1.5 h; standing for 0.4min after cold pressing, and then carrying out hot pressing at the hot pressing pressure of 14mpa and the temperature of 113 ℃ for 0.2 h;
(6) and (3) after standing and curing for 3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of UV paint on the surface of the multilayer splint.
Example 3
This example differs from example 1 in that:
the manufacturing method of the multilayer board comprises the following steps:
(1) cutting and drying: cutting wood into single-layer plates with the thickness of 2.2mm, putting the single-layer plates into a vacuum dryer, taking out and standing for 3 hours when the single-layer plates are dried to the moisture content of 50%, then putting the single-layer plates into the vacuum dryer, taking out and standing for 2 hours when the single-layer plates are dried to the moisture content of 24%, and then putting the single-layer plates into the vacuum dryer to dry the single-layer plates to the moisture content of 8%;
(2) splicing and repairing the dried single-layer plate;
(3) glue mixing: adding 6 parts of ammonium chloride into 63 parts of phenolic resin binder, uniformly mixing, and then adding 35 parts of flour for mixing;
(4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate;
(5) and (3) laminating: carrying out cold pressing on the bonded multi-layer splint, wherein the cold pressing pressure is 12mpa, and the time is 2 h; standing for 0.5min after cold pressing, and then carrying out hot pressing at the temperature of 113 ℃ under the hot pressing pressure of 15mpa for 0.2 h;
(6) and (3) after standing and curing for 3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of UV paint on the surface of the multilayer splint.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. The manufacturing method of the multilayer board is characterized in that: the method comprises the following steps:
(1) cutting and drying: cutting wood into single-layer boards with the thickness of 1.6-2.2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 2-3h when the single-layer boards are dried to the moisture content of 45-50%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 1.5-2h when the single-layer boards are dried to the moisture content of 18-25%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 5-8%;
(2) splicing and repairing the dried single-layer plate;
(3) glue mixing: adding 4.5-6 parts of ammonium chloride into 58-63 parts of phenolic resin binder, uniformly mixing, and then adding 30-35 parts of flour for mixing;
(4) gluing: coating glue on the single-layer plate by using a glue coater, and then sticking the single-layer plate into a multi-layer clamping plate; the gluing machine comprises a glue solution pool, a gluing unit and a lifting unit used for lifting the wood board below the gluing unit, wherein the gluing unit comprises a gluing cylinder with an opening at the lower end, a motor fixed on the upper surface of the gluing cylinder and a rotating plate positioned below the gluing cylinder; the lower end of the threaded rod is fixed on the rotating plate, the lower surface of the rotating plate is provided with a glue spreader capable of rotating automatically, the glue spreader is horizontally arranged, and the rotating plate is provided with a plurality of one-way glue outlet valves opposite to the glue spreader; a plurality of corrugated pipes with the same number as the one-way glue outlet valves are connected between the pressing plate and the rotating plate, and the corrugated pipes are opposite to the one-way glue outlet valves; the corrugated pipe is connected with a rubber inlet pipe, the inlet of the rubber inlet pipe is communicated with a rubber solution pool, and the rubber inlet pipe is provided with a one-way rubber inlet valve; the side wall of the upper side of the gluing cylinder is provided with a one-way air inlet valve and an exhaust pipe, and the exhaust pipe is provided with a one-way exhaust valve; an air passage and a plurality of branch air passages communicated with the air passage are arranged in the rotating plate, the discharge port of each branch air passage is positioned on the lower surface of the rotating plate, and the outlet of the exhaust pipe is communicated with the air passage;
(5) and (3) laminating: cold pressing the bonded multi-layer splint at the pressure of 10-12mpa for 1.5-2 h; standing for 0.3-0.5min after cold pressing, and then carrying out hot pressing at the hot pressing pressure of 13-15mpa and the temperature of 108-;
(6) and (3) after standing and curing for 2-3 days, polishing and trimming the multilayer splint obtained in the step (5), and finally spraying a layer of protective paint on the surface of the multilayer splint.
2. The method for making a multilayer plate according to claim 1, characterized in that: cutting and drying in the step (1): cutting wood into single-layer boards with the thickness of 2mm, putting the single-layer boards into a vacuum dryer, taking out and standing for 3 hours when the single-layer boards are dried to the moisture content of 45%, then putting the single-layer boards into the vacuum dryer, taking out and standing for 2 hours when the single-layer boards are dried to the moisture content of 22%, and then putting the single-layer boards into the vacuum dryer to dry the single-layer boards to the moisture content of 7%.
3. The method for making a multilayer plate according to claim 1, characterized in that: and (3) glue mixing: 4.8 parts of ammonium chloride is added into 62 parts of phenolic resin binder, and 30 parts of flour is added after uniform mixing.
4. The method for making a multilayer plate according to claim 1, characterized in that: and (5) pressing: carrying out cold pressing on the bonded multi-layer splint, wherein the cold pressing pressure is 12mpa, and the time is 1.8 h; and (3) standing for 0.5min after cold pressing, and then carrying out hot pressing at a hot pressing pressure of 13mpa and a temperature of 110 ℃ for 0.2 h.
5. The method for making a multilayer plate according to claim 1, characterized in that: in the step (6), the protective paint is UV paint.
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| CN201711367491.3A CN108145807B (en) | 2017-12-18 | 2017-12-18 | Method for manufacturing multilayer board |
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| CN108145807B true CN108145807B (en) | 2020-04-14 |
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| CN1118717A (en) * | 1994-06-27 | 1996-03-20 | 松下电器产业株式会社 | Fluid Supplying apparatus |
| CN105922376A (en) * | 2016-06-28 | 2016-09-07 | 重庆芦万木材有限公司 | Wood gluing device |
| CN106944298A (en) * | 2017-05-23 | 2017-07-14 | 邱苏英 | A kind of brake block is made of automation brush coating device |
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