WO2012034300A1

WO2012034300A1 - Method for manufacturing laminated wood using wood

Info

Publication number: WO2012034300A1
Application number: PCT/CN2010/078272
Authority: WO
Inventors: 李和麟
Original assignee: Li Helin
Priority date: 2010-09-17
Filing date: 2010-10-31
Publication date: 2012-03-22
Also published as: CN102398288A; CN102398288B

Abstract

A method for manufacturing laminated wood using wood is provided. The method comprises the following steps: (1) manufacturing veneers with a thickness of 0.3mm-5mm from wood, immersing the veneers in glue and then drying, wherein the lengths and the widths of the veneers are the same as the length and the width of an inner die, or the widths of the veneers and the inner die are the same while the lengths of the veneers are a fraction of the length of the inner die, (2) stacking the veneers to form a blank and putting the blank in the inner die of the die, wherein fillets with a radius of 3mm-20mm are formed between the groove bottom and the side walls of the groove in the inner die, and corresponding holes are formed on the side walls to cooperate with pins at the same level, (3) delivering the blank into the inner die of the movable die in the press after the compression molding of the blank, passing the pins through the corresponding holes, locking the inner die by a pressing plate under the corresponding holes on the side walls, heating the locked inner die and the blank and then solidifying, (4) removing the pins after cooling, demoulding the blank of which the exposed surface presents artificial annual growth rings, placing the blank in the natural environment and then cutting the blank into sheets presenting artificial annual growth rings according to the annual growth rings of the blank. The method enables the manufacture of the laminated wood with high strength and rich artificial texture.

Description

Method for manufacturing laminated timber from wood

The invention relates to a method of making laminated wood from wood.

Background technique

The manufacturing method of the existing wood phenolic resin laminated material is as in the technical solution disclosed in Chinese Patent No. ZL93105062. 6, the wood is selected, sheared, dipped, aged, dried, pre-compressed, laminated and hot pressed into a layer. material. 5〜5〜5〜5~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2. The 5mm veneer itself can hardly see the natural texture of the wood; after the lamination is hot pressed into the laminated material, most of the laminates only have the horizontal parallel texture produced by the lamination, and the change is also caused by the change of the angle of the opening sheet. The distance between the two changes, there is no rich texture of natural wood grain, and the appearance of the texture is not clear. And the production cost of producing laminated timber according to this method is high.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for producing a laminated material from a fast-growing material which has high product strength, small internal stress, adjustable color, can exhibit simulated wood grain, and has low production cost.

The present invention is implemented as follows:

The method for producing a laminated timber from wood according to the present invention comprises the following steps:

(1) The wood is made into a veneer having a thickness of 0.3 to 5 mm, and the veneer is dipped and dried. The length and width of the veneer are the same as the inner mold of the mold or the width of the veneer is the same as the inner mold. Is a fraction of the length of the inner die, that is, the inner die length is an integral multiple of the length of the veneer,

(2) The veneers are superimposed to form a blank, and the blank is placed in the inner mold of the mold. The inner mold of the mold is a concave groove open at both ends, and the angle between the bottom of the groove and the groove wall is a radius of R: 3 mm R 20mm, the groove wall has corresponding holes in the same horizontal plane to match the pin,

(3) After the blank is sent into the inner mold of the movable mold of the press, the pressure plate is placed under the corresponding hole of the groove wall, and the inner mold of the mold is heated and solidified by the inner mold after the lock is inserted through the corresponding hole.

(4) After cooling, the pin is removed, and the blank is taken off, and the exposed surface of the blank presents a simulated annual ring line, and the blank is in nature. Placed in the environment, open according to the annual ring of the blank. The simulated annual ring line is also present on the opened sheet. Some additional technical solutions of the present invention are as follows:

Preferably, the inner mold bottom and the groove wall have an angular radius R: 5 mm R 10 mm.

Preferably, the thickness of the veneer is 1. 3~2 mm, which is cut by cutting and cutting.

Preferably, before the veneer is dipped, the veneer is placed in a carbonization tank and carbonized by steam to change the color of the veneer. When the veneer is superimposed on the composite, one of the following methods may be used:

(1) Carbonized veneer and non-carbonized veneer, the length direction of wood fiber is superposed and superimposed:

(2) Stacking of non-carbonized veneer wood fibers in the longitudinal direction:

(3) superposition of the length direction of the carbonized veneer wood fiber;

(4) The carbonized veneer and the non-carbonized veneer wood fiber are alternately superposed with a plurality of layers, and then superposed to a balance layer composed of a plurality of short pieces of wood fiber perpendicular to the former.

In order to achieve a better effect, the method of the present invention may further include the following steps:

(1) The material is selected, the wood is cut or sliced, and the veneer having a length of 100 to 3000 mm, a transverse width of 60 to 1270 mm, and a thickness of 0.5 to 5 mm is cut, and then dried, and the veneer is cut. Dry or dry to less than 15% moisture content;

(2) bleaching, dyeing, anti-corrosion, flame retardant and perfuming treatment according to the use of the material, or partial treatment, or other conventional treatment steps;

(3) The veneer is sent to the carbonization tank, and the steam is boosted to 2~4Mpa. The steam is exhausted by the exhaust valve for 20 minutes. After the exhaust, the steam is pressurized to 2~4MPa. 5〜lMpa,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The holding time is 2 to 6 hours, and the carbonization treatment is performed;

(4) The carbonized and dried veneer is dipped in an aqueous solution of a phenolic resin or a melamine adhesive, so that the amount of the added glue is 7 to 9% of the total weight of the material _;

(5) drying the veneer to 80 ° C or less, so that the moisture content of the veneer is between 12 and 20%;

(6) After the dried rubberized veneer is set to a density and then quantized, one of the following methods is used to form a blank, and the blanking method is as follows: the carbonized veneer and the natural veneer wood fiber are alternately stacked and stacked, which can be Forming a natural texture material that is deep and shallow, The second method of the blank is to superimpose the wood color veneer wood fiber in the forward direction to form the natural texture of the material.

The third method of the blanking method: the veneer wood fiber of the same carbonized color is superposed on the stack, and the natural texture of the bronze color can be formed.

Forming method 4: The wood fiber is formed into a layer of greater than or equal to one layer, and the horizontal layer of wood fiber is more than one layer, which can be repeated for a thousand groups to form a more stable structure.

(7) feeding the blank into the press, pressing it into the U-shaped mold, and inserting the mold through the press plate; the width of the inner cavity of the mold is the same as the width of the veneer, and the length is equivalent to the length of the veneer, and there is a bottom portion of the inner cavity. More than 4~7mm R rounded corners, generally R rounded corners larger than 4mm can be used to make the veneers form an arc in the cavity after pressing, and the simulated wood grain is formed on the blank:

(8) The mold after mold clamping is sent to the solidification kiln for heating and solidification. The curing temperature is determined to be between 120 and 170 ° C according to the binder, and the temperature is kept for 2 to 6 hours, and is cooled to below 40 ° C. After discharge;

(9) Remove the pin, take off the blank, and place the blank in a natural place. The material is sawed, planed and milled according to the application, and made into various high-grade furniture, flooring, door and window products.

The invention puts the veneer blank into the inner mold with the concave groove open at both ends, and presses the corner with the radius of the concave groove bottom and the groove wall to be more than 3 mm, and the material is heated during the hot pressing process. The laminations in the blank are bent and moved while being compressed, and curved artificial wood grain having the same bending direction is formed in the cross section of the laminated material. The cross-section and longitudinal section of the laminated material along the axial direction of the inner mold also have a simulated rich wood grain, and the inner mold can be axially cross-sectioned to even a closed or semi-closed annular wood grain. The texture is rich and realistic, making people believe that the plates after opening are from laminated bricks rather than from natural logs. The carbonized post-composite of the single-board of the invention can adjust the color of the wood grain, increase the hardness and strength of the material, and reduce the internal stress of the laminated wood. The balancing layer in the preform also acts as a reinforcing rib to increase the strength of the layered wood. The invention has the advantages of simple process, low production cost, high product strength and good stability, and the plate after the opening can present the simulated wood grain, the wood grain pattern and the rich color, and the wood grain texture of the plate after the natural round piece is opened. The strength and toughness are higher than the index of natural round wood board, and even reach and exceed the index of hard wood board.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a structural view of an inner mold and a preform according to an embodiment of the present invention.

2 is a surface texture diagram of a sheet according to an embodiment of the present invention; detailed description

In the specific implementation of the present invention, the inner mold is as shown in Fig. 1, 1 is a U-shaped mold, the bottom of the mold has a rounded corner R of 4 mm, 2 is a pin for clamping, 3 is a steel press plate, and A layer is carbonized. Layer, layer B is the color single-layer layer, and layer C is the horizontal reinforcement layer. The combination of A, B, C and R fillets can achieve better resistance to deformation and form a natural rich cross-section texture. People's visual needs.

The manufacturing method of the present invention comprises the following steps:

(1) Material selection, which will be cut by wood and cut into a veneer with a length of 1270 mm, a transverse width of 135 mm and a thickness of 1. 7 mm. The veneer veneer or the remaining material is cut into the length of the grain. a 120 mm strip, drying the veneer to a moisture content of 12%;

(2) Using a vacuum infusion method to infiltrate the veneer with a preservative:

(3) The veneer is sent to the carbonization tank, and the steam is pressurized to 3 MPa. The steam is exhausted once by the exhaust valve for 20 minutes. After the exhaust, the steam is pressurized to 2~4 MPa, so that the cycle is repeated 4 times. The temperature is maintained between 130 and 160 ° C for carbonization;

(4) The carbonized and colored veneers are dried and placed in an aqueous solution of a phenolic resin adhesive for 6-10 minutes, and the amount of the applied glue is 7 to 9% (the ratio of the solid glue to the total weight of the material);

(5) The veneer is applied to the drying and water balance treatment below 80 ° C, so that the moisture content of the veneer is between 14 and 16;

(6) The rubber veneer after the balance of the dried water is weighed according to the density of lg/cm ^{3 and} then the composition is blank. The method of the blank is: a carbonized color veneer strip and a natural one veneer strip alternately After superimposing the blanks and 5 sets of the blanks, a horizontal short veneer strip is added, and the blank is cycled in this way until the quasi blank is completed;

(7) feeding the blank into the press, pressing it into the U-shaped mold, and inserting the mold through the press plate; the width of the inner cavity of the mold is the same as the width of the veneer, and the length is equivalent to the length of the veneer, at the bottom of the inner cavity There are 4 mm rounded corners to allow the veneer to form a natural arc in the cavity after pressing;

(8) The mold after the mold clamping is fed into the curing channel or the curing kiln for heat curing. The curing temperature is determined to be between 120 and 170 ° C according to the adhesive, and the temperature is kept for 2 to 6 hours, and is cooled to 60 °. Discharge after C;

(9) Remove the pin and take off the material, place the material in the natural environment, and selectively open the film according to the state of the blank layer of the blank. When the layer is opened, the balance layer is prevented from being criss-crossed on the surface of the sheet, which is not easy to be deformed. The texture is similar to the high-grade anti-corrosion layer of Wujinmu. The above-described embodiments of the method for producing laminated sheet can be obtained through experimental test LVL meet the following criteria: density of the laminated sheet 1. l~1 25g / cm ³ or more, the formaldehyde emission is less than 0. 3mg / L, the elastic The modulus is greater than 9000 MPa and the static bending strength is greater than 80 MPa.

In the above embodiment, the eucalyptus is exemplified, but the method of the present invention is not limited to eucalyptus, and other wood materials can be processed by the method of the present invention to obtain a similar laminated material, particularly for quick-forming wood.

Any feature disclosed in this specification (including any additional claims, abstracts and drawings) may be replaced by other equivalents or alternative features, unless otherwise stated. Gp, unless specifically stated, each feature is just one example of a series of equivalent or similar features.

The invention is not limited to the specific embodiments described above. The invention extends to any new feature or any new combination disclosed in this specification, as well as a novel or a novel combination of any new method or process disclosed.

Claims

Claim

1. The method of making laminated timber from wood, including the following steps:

(1) The wood is made into a veneer having a thickness of 0.3 to 5 mm, and the veneer is dipped and dried. The length and width of the veneer are the same as the inner mold of the mold or the width of the veneer is the same as the inner mold, and the length is a fraction of the length of the inner die,

(4) After cooling, the pin is removed, the blank is taken off, and the exposed surface of the blank presents a simulated annual ring line. The blank is placed in the natural environment, and the blank is opened according to the annual ring of the blank, and the simulated year is also displayed on the sheet. Wheel line.

2. The method according to claim 1, characterized in that the inner mold bottom and the groove wall have an angular radius R: 5 mm 10 mm.

3. The method according to claim 1, wherein the thickness of the veneer is 1. 3 to 2 mm, which is cut by cutting and cutting.

4. The method according to claim 1, wherein the veneer is placed in a carbonization tank and subjected to carbonization treatment with steam to change the color of the veneer. When the veneer is superimposed on the composite body, one of the following methods may be used:

(3) superposition of the length direction of the carbonized veneer wood fiber;

5. The method of claim 1 including the following steps:

(1) The selected material, the wood is cut or sliced, and the cost of the fiber is 100~3000mm, the transverse width is 60~1270mm, the thickness is 0. 5~5mm, and then the drying process is performed. Dry or dry to less than 15% moisture content;

(2) bleaching, dyeing, anti-corrosion, flame retardant, aromatherapy, etc. according to the use of the material; (3) The veneer is sent to the carbonization tank, and the steam is boosted to 2~4Mpa. The steam is exhausted by the exhaust valve for 20 minutes. After the exhaust, the steam is pressurized to 2~4MPa. 5〜lMpa,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The holding time is 2 to 6 hours, and the carbonization treatment is performed;

(4) The carbonized and dried veneer is dipped in an aqueous solution of a phenolic resin or a melamine adhesive, and the amount of the added glue is 7 to 9% of the total weight of the material _;

(6) After the dried rubberized veneer is set to a density and then quantized, one of the following methods is used to form a blank, and the blanking method is as follows: the carbonized veneer and the natural veneer wood fiber are alternately stacked and stacked, which can be Forming a natural texture material that is deep and shallow,

The second method of the blank is to superimpose the wood color veneer wood fiber in the forward direction to form the natural texture of the material.

The fourth method of the blank: the wood fiber is formed into a layer of greater than or equal to one layer, and the horizontal layer of the wood fiber is more than one layer, which can be repeated and formed into a more stable structure.

(7) feeding the blank into the press, pressing it into the U-shaped mold, and inserting the mold through the press plate; the width of the inner cavity of the mold is the same as the width of the veneer, and the length is equivalent to the length of the veneer, and there is a bottom portion of the inner cavity. More than 4~7mmR rounded corners, so that after the pressing, the veneers form an arc in the cavity, and the simulated wood grain is formed on the blank:

(8) The mold after mold clamping is sent to the solidification kiln for heating and solidification. The curing temperature is determined to be between 120 and 170 °C according to the binder, and the temperature is kept for 2 to 6 hours, and is cooled to below 40 °C. After discharge;