CN112829027A

CN112829027A - Method for manufacturing bamboo-wood composite board

Info

Publication number: CN112829027A
Application number: CN202011604084.1A
Authority: CN
Inventors: 郑明坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-25

Abstract

A manufacturing method of a bamboo-wood composite board comprises the following steps: (1) bamboo filament processing, (2) poplar veneer dyeing, (3) drying, (4) gum dipping, (5) airing, (6) weighing, assembly forming, (7) high-temperature curing, and (8) balancing and splitting, and the board manufactured by the method saves a large amount of wood, and the weight contents in the bamboo board are respectively as follows: 15-25% of phenolic resin, 2-10% of poplar, 65-83% of bamboo and 1.05-1.15 g/cm3 in density, so that the board manufactured by the method is high in bamboo content, less in fir, low in cost and low in quality such as small-diameter bamboo and twigs, and the manufactured board also has colorful stripes or stripes of various colors.

Description

Method for manufacturing bamboo-wood composite board

Technical Field

The invention relates to a method for manufacturing a bamboo-wood composite board.

Background

The wide application of wooden plate material is in fields such as vehicle interior trim, indoor outer decoration, furniture, the material of mating formation on the ground, along with people's improvement of standard of living, and the demand to wooden plate material is more and more, but because of the protection to the forest, the output of wooden plate material does not have corresponding increase yet, consequently can not satisfy people's demand. China is the country with the most abundant bamboo resources in the world, and bamboo species and bamboo forest areas all account for about 1/3 in the world. Therefore, the development of bamboo and wood composite materials for relieving the pressure of wood plate supply has very important significance.

Disclosure of Invention

The invention aims to provide a method for manufacturing a bamboo-wood composite board aiming at the defects in the prior art. The board is made of a small amount of fir board and a large amount of inferior bamboo materials such as small-diameter bamboo materials, twigs and the like, has the advantages of low cost, short manufacturing period and the like, and the surface of the bamboo board also has colorful stripes or stripes of various colors.

The technical solution of the invention is as follows:

a manufacturing method of a bamboo-wood composite board comprises the following steps:

(1) and (3) bamboo filament processing, namely, grinding fresh bamboo into filaments by using a filament grinding machine, and bleaching or performing steam carbonization treatment according to needs.

(2) Firstly, adding a dye into hot water in a dyeing tank, fully stirring the dye to enable the dye to be dissolved uniformly, wherein the volume percentage of the dye is between 1 and 5 percent, then adding the China fir veneer, and dyeing for 2 to 3 hours at the dyeing pressure of 0.8 to 2MPa and the dyeing temperature of 75 to 95 ℃.

(3) And (3) drying, namely stacking the bamboo filaments and the dyed China fir veneers by using parting strips, and drying the bamboo filaments and the dyed China fir veneers in a drying kiln until the water content is reduced to 6-8%.

(4) And (3) dipping the dried bamboo filaments and the fir veneers into a glue pool containing 30% of phenolic resin by volume, wherein the glue dipping amount is 10-25% (the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the bamboo filaments and the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the fir veneers).

(5) And airing, namely airing the bamboo filaments and the fir veneers after gum dipping at a low temperature until the water content is 10-15%, airing at a temperature of 30-40 ℃ and airing for 24 hours.

(6) Weighing and assembling to form, weighing the dried bamboo filaments, putting the bamboo filaments into a forming tank, ensuring the density of a finished product to be between 1.05 and 1.15g/cm3, placing 3 to 20 dried fir veneers with the width of 105mm in each tank according to the texture effect, and forming for 3 to 5 minutes under the material forming pressure of 18 to 20 MPa.

(7) And (3) high-temperature curing, namely putting the formed plate blank into a chain type high-temperature heating kiln for heating to completely cure the phenolic resin, controlling the temperature in the kiln to be between 130 and 140 ℃, and heating for 24 hours.

(8) The sheet is balanced and split, the sheet can be split after the slab is taken out of the kiln in a balanced 3-day manner, the sheet splitting mode has two types of flat opening and vertical opening, and two effects of straight lines and disordered lines can be obtained respectively.

Preferably, the thickness of the Chinese fir veneer added during the dyeing of the Chinese fir veneer in the step 2 is 3-5 mm.

The bamboo board manufactured by the method comprises the following components in percentage by weight: 15-25% of phenolic resin, 2-10% of fir, 65-83% of bamboo, and 1.05-1.15 g/cm3 of density, wherein the bamboo filaments in the board can be bleached yellow-white bamboo filaments or carbonized color bamboo filaments treated by steam; the color of the fir veneer can be adjusted to be different according to market demands.

The invention has the beneficial effects that:

1. the board manufactured by the invention saves a large amount of wood, and the weight contents in the bamboo board are respectively as follows: 15-25% of phenolic resin, 2-10% of fir, 65-83% of bamboo and 1.05-1.15 g/cm3 in density, so that the board prepared by the method has high bamboo content and uses less fir.

2. The bamboo material of the invention is inferior bamboo material such as small-diameter bamboo material, twigs and the like, the cost is very low, and the manufacturing period of the board is short.

3. The material assembly forming pressure is 18-20 MPa, and the forming is carried out under relatively low pressure, so that the organizational structures of bamboo and wood are protected, and the requirement of the board on the density is met. And the cold pressing method is adopted in the invention, and the method can be realized by a conventional press.

4. The invention dyes the fir veneer, and then compounds the fir veneer with the bamboo filament, so that the surface of the bamboo board has colorful stripes or stripes with various colors, and the color of the fir can be customized according to the requirements of customers, thereby meeting the requirements of consumers on the surface color of the bamboo board.

Detailed Description

The embodiment provides a manufacturing method of a bamboo-wood composite board, which comprises the following steps:

(1) and (3) processing the bamboo filaments, namely, grinding fresh bamboo chips into filaments by using a filament grinding machine, and then bleaching or performing steam carbonization treatment according to the needs.

(2) Firstly, adding dye into hot water in a dyeing tank, fully stirring the mixture to enable the dye to be dissolved uniformly, wherein the volume percentage of the dye is between 1 and 5 percent, then cutting the Chinese fir veneer with the thickness of 1 to 2mm into required length, adding the cut Chinese fir veneer into the dyeing tank, dyeing for 2 to 3 hours, wherein the dyeing pressure is 0.8 to 2MPa, and the dyeing temperature is 75 to 95 ℃.

(4) And (3) dipping the dried bamboo filaments and the fir veneers into a glue pool containing 30% of phenolic resin by volume, wherein the glue dipping amount is 10-25% (the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the bamboo filaments and the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the fir veneers). When the content of the phenolic resin is too low, the gluing strength of the material cannot be ensured, and when the content of the phenolic resin is too high, the glue dipping quality is influenced, so that the content of 30 percent is optimal, and the glue dipping amount can reach 20 percent (absolute dryness) after the glue dipping is carried out for 30 minutes.

(6) Weighing the dried bamboo filaments, placing the bamboo filaments into a forming groove, ensuring that the density of a finished product is between 1.05 and 1.15g/cm3 according to the volume and the weight, placing 3 to 20 dried fir veneers with the width of 105mm in each groove according to the texture effect, wherein the material forming pressure is 18 to 20MPa, and the forming time is 3 to 5 minutes.

(8) Balance and splitting, the temperature of the slab after leaving the kiln is high, the internal water content is not even, the slab can be split in 3-day balance, the splitting mode has two types of flat opening and vertical opening, two effects of straight lines and messy lines can be obtained respectively, and the slab can be selected according to requirements.

Claims

1. A manufacturing method of bamboo-wood composite board is characterized in that: the production method comprises the following steps:

(1) processing bamboo filaments, namely, grinding fresh bamboo into filaments by using a filament grinding machine, and bleaching or performing steam carbonization treatment according to the requirement;

(2) firstly, adding a dye into hot water in a dyeing tank, fully stirring the dye to enable the dye to be dissolved uniformly, wherein the volume percentage of the dye is between 1 and 5 percent, then adding the China fir veneer, and dyeing for 2 to 3 hours at the dyeing pressure of 0.8 to 2MPa and the dyeing temperature of 75 to 95 ℃;

(3) drying, namely stacking the bamboo filaments and the dyed China fir veneers by using parting strips, and drying the bamboo filaments and the dyed China fir veneers in a drying kiln until the water content is reduced to 6-8%;

(4) dipping the bamboo filaments and the fir veneers into a glue pool containing phenolic resin with the volume content of 30 percent, wherein the dipping amount is 10 to 25 percent (the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the bamboo filaments and the ratio of the oven dry weight of the phenolic resin to the oven dry weight of the fir veneers);

(5) air-drying the bamboo filaments and the fir veneers after gum dipping at a low temperature until the water content is 10-15%, the air-drying temperature is 30-40 ℃, and the air-drying time is 24-48 hours;

(6) weighing and assembling to form, namely weighing the dried bamboo filaments, putting the bamboo filaments into a forming groove, ensuring the density of a finished product to be between 1.05 and 1.15g/cm3, placing 3 to 20 dried fir veneers with the width of 100 to 110mm in each groove according to the texture effect, wherein the material forming pressure is 18 to 20MPa, and the forming time is 3 to 5 minutes;

(7) high-temperature curing, namely putting the formed plate blank into a chain type high-temperature heating kiln for heating to completely cure the phenolic resin, controlling the temperature in the kiln to be between 130 and 140 ℃, and heating for 24 hours;

(8) balancing and cutting, and balancing 2-4 days after the plate blank is taken out of the kiln.

2. The manufacturing method of the bamboo-wood composite board as claimed in claim 1, characterized in that: the thickness of the Chinese fir veneer added during the dyeing of the Chinese fir veneer in the step 2 is 3-5 mm.