CN106625960A - Bamboo wood compound square column and preparation method thereof - Google Patents

Bamboo wood compound square column and preparation method thereof Download PDF

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Publication number
CN106625960A
CN106625960A CN201611206256.3A CN201611206256A CN106625960A CN 106625960 A CN106625960 A CN 106625960A CN 201611206256 A CN201611206256 A CN 201611206256A CN 106625960 A CN106625960 A CN 106625960A
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China
Prior art keywords
bamboo
wood
veneer
recombined
pressure
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CN201611206256.3A
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Chinese (zh)
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CN106625960B (en
Inventor
卫佩行
饶鑫
杨静
王建和
王永奇
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江苏农林职业技术学院
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00Manufacture of veneer ; Preparatory processing therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D1/00Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04Joining 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D1/00Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04Joining 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
    • B27D1/08Manufacture of shaped articles; Presses specially designed therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00Applying adhesives or glue to surfaces of wood to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27JMECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
    • B27J7/00Mechanical working of tree or plant materials not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34Organic impregnating agents

Abstract

The invention discloses a bamboo wood compound square column. A laminated veneer lumber is arranged on the periphery; a recombined bamboo core material is arranged at the center; and the laminated veneer lumber and the recombined bamboo core material are spliced through mono-component polyurethane or water-based vinyl polyurethane. A preparation method for the bamboo wood compound square column comprises the three steps of preparing the laminated veneer lumber, preparing the recombined bamboo core material and preparing a blank and forming by laminating. The advantages of fast-growing wood and bamboo are fully utilized by the technique according to the invention, so that the bamboo wood compound square column has the following three advantages: 1) the wood and the bamboo are reasonably arranged, the compressive strength and the compressive strength can be increased by 30-40% and the panel produced according to the method has a reasonable structure, excellent performances and beautiful appearance; 2) the additional value and technological content of the fast-growing wood and bamboo are increased and the engineering application field of the fast-growing wood and bamboo is greatly widened; and 3) the veneer lumber is preheated in high frequency, so that the efficiency is higher.

Description

Compound square column of a kind of bamboo and wood and preparation method thereof

Technical field

The invention belongs to engineered wood product manufacture field, the compound square column of more particularly to a kind of bamboo and wood and preparation method thereof.

Background technology

Laminated veneer lumber, is a kind of using small diameter grade log, (can also add veneer multilayer gluing, rift grain Jing after rotary-cut Enter face crossing) assembly, splicing glue laminated high-performance novel structural material, it not only remains many good days of timber Right advantage, also with uniform architectural characteristic, Strength Variance is little, and allowable stress is high, considerably beyond there is a section material, close knot free timber, Good stability of the dimension, the ratio of strength to weight is better than steel, easy to process, and with good stability and antidetonation shock attenuation.Recombined bamboo is again Weigh bamboo, be it is a kind of bamboo wood is reorganized and is strengthened a kind of bamboo matter new material of shaping, that is, by bamboo processing into Strip thin bamboo strips used for weaving, bamboo silk pulverize into bamboo tow, after drying impregnation, and then re-dry is laid in mould to moisture content is required In, the section bar of Jing HTHP heat cures.But if above-mentioned veneer or bamboo cane are single use and exist fragility by force, The short problem of service life.

The content of the invention

The invention provides a kind of compound square column of bamboo and wood.

Present invention also offers the preparation method of the compound square column of above-mentioned bamboo and wood.

A kind of bamboo and wood of the present invention is combined square column, and periphery is laminated veneer lumber, middle for Recombined bamboo core, ply Using monocomponent polyurethane or water-based ethylene based polyurethanes bonding between product material and Recombined bamboo core.

Preferably, the Recombined bamboo core is tetragonal prism, and the equal uniform thickness of the laminated veneer lumber is isometric wide, and veneer Laminated timber thickness is the 1/4-1/2 of Recombined bamboo core thickness.It is further preferred that it is Recombined bamboo core that laminated veneer lumber is thickness The 1/4-1/3 of thickness.

When the bamboo and wood is combined square column group embryo, Recombined bamboo core is placed in into thick middle, is arranged in order outer layer lamina base material, So that laminating is tight.

The preparation method of the compound square column of above-mentioned bamboo and wood, comprises the following steps:

(1) preparation of laminated veneer lumber:Fast growing wood is peeled into veneer and is pre-processed, then with multilayer fast growing wood list Plate sawing after gluing, rift grain assembly, pressure gluing is formed;

(2) preparation of Recombined bamboo core:To be placed on after raw bamboo radial direction subdivision in the phenolic resin that solid content is 35% and soak Stain drenches dry, hot-press solidifying shaping;

(3) embryo and pressing and forming are organized:The Recombined bamboo core of step (2) is placed in into centre, the laminated veneer lumber of step (1) is put In Recombined bamboo core surrounding, it is cold-pressed into using being placed in die press after monocomponent polyurethane or water-based ethylene based polyurethanes bonding Type.

Preferably, in step (1), fast growing wood is peeled into veneer, refers to and fast growing wood is peeled into width for 900- 1500mm, length is 2000-2500mm, and thickness is the veneer of 2.0-3.0mm.

Preferably, it is glued through gluing, rift grain assembly, pressure with multilayer fast growing wood veneer in step (1), refer to by By phenolic resin bonding after 40-60 layer veneer rift grain group embryos, wherein single plate double side glue-spread is 250-300g/m2

It is further preferred that Veneer gluing is carried out using " high frequency precompressed and hot pressing " technique after gluing, specifically in high frequency Power output is 3.5-10KW and pressure is that 3-15min is preheated on high frequency press under the conditions of 0.5-1.0MPa, then in temperature 130-150 DEG C, hot pressing is carried out on the hot press of pressure 1.0-1.2MPa, hot pressing time is calculated according to 0.5-1.5min/mm.

Preferably, in step (2), by raw bamboo radial direction subdivision, refer to raw bamboo radial direction subdivision to be that width is 5-10mm, length For 1500-3000mm, thickness is the bamboo cane of 1.5-2.0mm.

Preferably, in step (2), the bamboo cane is placed in the phenolic resin that solid content is 35% and impregnates 15min, so Dry 1-2h is drenched afterwards until tack-free;The bamboo cane drenched after doing is pressed into rift grain direction assembly, ultimately forms 800 × (300-600) mm's Slab;Under the conditions of being placed in 140 DEG C of temperature and unit pressure 3-5MPa, die press hot-press solidifying shaping, hot pressing time according to Slab thickness is calculated according to 0.2min/mm.

Preferably, in step (3), monocomponent polyurethane or water-based ethylene based polyurethanes are coated on into Recombined bamboo surface, root Cutting is carried out to laminated veneer lumber according to the size of Recombined bamboo, it is then that laminated veneer lumber is coated around Recombined bamboo.

Preferably, in step (3), glue-spread is 140-180g/m2

Preferably, in step (3), the bamboo and wood combined column after assembly is placed in die press carries out cold moudling, surrounding Pressurize simultaneously, pressure is 0.5-1MPa, and the time is 1.5h.

Beneficial effect:The technology of the present invention makes full use of the advantage of fast growing wood and bamboo wood, can obtain three below benefit: One is reasonable Arrangement timber and bamboo wood, can improve 30-40% bearing capacity, and the plate construction for producing in this way is reasonable, performance It is superior;Two is the added value and scientific and technological content that improve fast growing wood and bamboo wood, and its engineer applied field is expanded significantly;Three is to adopt Radio-frequency preheating veneer is used, it is in hgher efficiency.Laminated veneer lumber is manufactured by base material of fast growing wood veneer, to make full use of plantation model Wide fast growing wood resource is enclosed, the advantage of timber antidetonation itself is not only played, is overcome in fast growing wood material itself and processing Defect, and by built-in Recombined bamboo its physical and mechanical property is greatly improved, meanwhile, volume recovery is higher, economic benefit Significantly;Solid wood is compared, the compound square column of bamboo and wood has designability, can carry out structure design according to actually used situation;In addition, high The application of frequency technology causes the manufacturing cycle of thicker laminated veneer lumber to greatly shorten, and improves productivity and quality.

Description of the drawings

Fig. 1 is the structural representation of the compound square column of bamboo and wood of the present invention;

Fig. 2 is the cross-sectional view of Fig. 1;

Fig. 3 is the design sketch of Fig. 1;

Fig. 4 is the design sketch of Fig. 2.

Wherein:1 Recombined bamboo core;2 laminated veneer lumbers.

Specific embodiment

The present invention is explained in detail with reference to specific embodiment.

Embodiment 1

The preparation of mao bamboon meaning Yang Fuhe square columns

(1) preparation of meaning poplar veneer.Process is:Meaning Yang Yuanmu-block-juggle softening-peeling-rotary-cut-shearing-repairing- Bevel grinding.It is 1000mm into width by meaning poplar rounding, length is 2200mm, thickness is the veneer of 2.5mm;Moisture content need not Especially control;By, by phenolic resin bonding, wherein single plate double side glue-spread is 280g/m after 50 layers of veneer rift grain group embryo2;Apply Veneer gluing is carried out using " high frequency precompressed and hot pressing " technique after glue, specifically in output high frequency power be 5KW and pressure is 10min is preheated on high frequency press under the conditions of 0.8MPa, then heat is carried out on 140 DEG C of temperature, the hot press of pressure 1.0MPa Pressure, hot pressing time is calculated according to 1.0min/mm;By the product cooling after hot pressing, sawing.

(2) preparation of mao bamboon recombinant material.Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-mats formation- Hot pressing-sawing.It is that width is 8mm by mao bamboon radial direction subdivision, length is 2000mm, and thickness is the bamboo cane of 1.8mm;By the bamboo cane It is placed in the phenolic resin that solid content is 35% and impregnates 15min, then drenches dry 1-2h until tack-free;The bamboo cane after doing will be drenched By rift grain direction assembly, the slab of 800 × (300-600) mm is ultimately formed;It is placed in 140 DEG C of temperature and unit pressure 3-5MPa Under the conditions of, die press hot-press solidifying shaping, hot pressing time is calculated according to slab thickness according to 0.2min/mm.

(3) it is 160g/m according to glue-spread by monocomponent polyurethane or water-based ethylene based polyurethanes2It is coated on Recombined bamboo table Face, cutting is carried out according to the size of Recombined bamboo to laminated veneer lumber, then that laminated veneer lumber is coated around Recombined bamboo;By group Bamboo and wood combined column after base is placed in die press carries out curing molding of colding pressing, and surrounding is pressurizeed simultaneously, and pressure is 0.5-1MPa, when Between be 1.5h.

The compound square column of gained bamboo and wood is prepared as shown in figure 1, middle is the tetragonal prism of Recombined bamboo core 1, outer layer surrounding is uniform thickness Isometric wide laminated veneer lumber, and laminated veneer lumber thickness is the 1/3 of Recombined bamboo core thickness.The bamboo and wood is combined square column During group embryo, Recombined bamboo core is placed in into thick middle, is arranged in order outer layer lamina base material so that laminating is tight.Fig. 2 positions cross section Figure, design sketch is shown in Fig. 3 and 4.

Embodiment 2

The preparation of the compound square column of mao bamboon Eucalyptus

(1) preparation of Eucalyptus veneer.Process is:Eucalyptus log-block-juggle softening-peeling-rotary-cut-shearing-repairing- Bevel grinding.Into width be 1000mm by Eucalyptus rounding, length is 2200mm, thickness for 2.5mm veneer;Moisture content need not Especially control;By, by phenolic resin bonding, wherein single plate double side glue-spread is 280g/m after 50 layers of veneer rift grain group embryo2;Apply Veneer gluing is carried out using " high frequency precompressed and hot pressing " technique after glue, specifically in output high frequency power be 5KW and pressure is 10min is preheated on high frequency press under the conditions of 0.8MPa, then heat is carried out on 140 DEG C of temperature, the hot press of pressure 1.0MPa Pressure, hot pressing time is calculated according to 1.0min/mm;By the product cooling after hot pressing, sawing.

(2) preparation of mao bamboon recombinant material.Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-mats formation- Hot pressing-sawing.It is that width is 8mm by mao bamboon radial direction subdivision, length is 2000mm, and thickness is the bamboo cane of 1.8mm;By the bamboo cane It is placed in the phenolic resin that solid content is 35% and impregnates 15min, then drenches dry 1-2h until tack-free;The bamboo cane after doing will be drenched By rift grain direction assembly, the slab of 800 × (300-600) mm is ultimately formed;It is placed in 140 DEG C of temperature and unit pressure 3-5MPa Under the conditions of, die press hot-press solidifying shaping, hot pressing time is calculated according to slab thickness according to 0.2min/mm.

(3) it is 160g/m according to glue-spread by monocomponent polyurethane or water-based ethylene based polyurethanes2It is coated on Recombined bamboo table Face, cutting is carried out according to the size of Recombined bamboo to laminated veneer lumber, then that laminated veneer lumber is coated around Recombined bamboo;By group Bamboo and wood combined column after base is placed in die press carries out curing molding of colding pressing, and surrounding is pressurizeed simultaneously, and pressure is 0.5-1MPa, when Between be 1.5h.

Comparative example 1

The preparation of meaning poplar laminated veneer lumber square column

Process is:Meaning Yang Yuanmu-block-juggle softening-peeling-rotary-cut-shearing-repairing-bevel grinding.Will meaning poplar rounding It is 1000mm into width, length is 2200mm, and thickness is the veneer of 2.5mm;Moisture content need not be controlled especially;By 50 layers of veneer By phenolic resin bonding after rift grain group embryo, wherein single plate double side glue-spread is 280g/m2;After gluing using " high frequency precompressed and Hot pressing " technique carries out Veneer gluing, in high frequency press under the conditions of being specifically 0.8MPa for 5KW and pressure in output high frequency power Upper preheating 10min, then carries out hot pressing on 140 DEG C of temperature, the hot press of pressure 1.0MPa, and hot pressing time is according to 1.0min/ Mm is calculated;By the product cooling after hot pressing, sawing

Comparative example 2

The preparation of mao bamboon recombinant material

Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-is mated formation-hot pressing-sawing.By mao bamboon radially It is 8mm that subdivision is width, and length is 2000mm, and thickness is the bamboo cane of 1.8mm;It is 35% that the bamboo cane is placed on into solid content 15min is impregnated in phenolic resin, dry 1-2h is then drenched until tack-free;The bamboo cane drenched after doing is pressed into rift grain direction assembly, finally Form the slab of 800 × (300-600) mm;Under the conditions of being placed in 140 DEG C of temperature and unit pressure 3-5MPa, die press hot pressing Curing molding, hot pressing time is calculated according to slab thickness according to 0.2min/mm.

Comparative example 3

The preparation of mao bamboon Eucalyptus mixing laminated timber square column

(1) preparation of Eucalyptus veneer.Process is:Eucalyptus log-block-juggle softening-peeling-rotary-cut-shearing-repairing- Bevel grinding.Into width be 1000mm by Eucalyptus rounding, length is 2200mm, thickness for 2.5mm veneer;Moisture content need not Especially control.

(2) preparation of mao bamboon recombinant material.Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-mats formation- Hot pressing-sawing.It is that width is 8mm by mao bamboon radial direction subdivision, length is 2000mm, and thickness is the bamboo cane of 1.8mm;By the bamboo cane It is placed in the phenolic resin that solid content is 35% and impregnates 15min, then drenches dry 1-2h until tack-free.

(3) Eucalyptus veneer and the bamboo cane interval layer wood single-plate of rift grain assembly, i.e., spread above one layer of bamboo cane, in bamboo cane One layer of veneer is repaved, by that analogy.It is required that top layer and bottom are wood single-plate.By monocomponent polyurethane or the poly- ammonia of water-based ethylene base Ester is 160g/m according to glue-spread2It is coated on adjacent Recombined bamboo and veneer surface;" high frequency precompressed and hot pressing " is adopted after gluing Technique carries out gluing, preheats on high frequency press under the conditions of being specifically 0.8MPa for 5KW and pressure in output high frequency power 10min, then carries out hot pressing on 140 DEG C of temperature, the hot press of pressure 1.0MPa, and hot pressing time is calculated according to 1.0min/mm; By the product cooling after hot pressing, sawing.

Embodiment 3

The preparation of mao bamboon meaning Yang Fuhe square columns

(1) preparation of meaning poplar veneer.Process is:Meaning Yang Yuanmu-block-juggle softening-peeling-rotary-cut-shearing-repairing- Bevel grinding.It is 900mm into width by meaning poplar rounding, length is 2000mm, thickness is the veneer of 2.0mm;Moisture content need not Especially control;By, by phenolic resin bonding, wherein single plate double side glue-spread is 250g/m after 40 layers of veneer rift grain group embryo2;Apply Veneer gluing is carried out using " high frequency precompressed and hot pressing " technique after glue, specifically in output high frequency power be 3.5KW and pressure is 3-15min is preheated on high frequency press under the conditions of 0.5MPa, then on 130 DEG C of temperature, the hot press of pressure 1.0-1.2MPa Hot pressing is carried out, hot pressing time is calculated according to 0.5-1.5min/mm.By the product cooling after hot pressing, sawing.

(2) preparation of mao bamboon recombinant material.Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-mats formation- Hot pressing-sawing.It is that width is 5mm by mao bamboon radial direction subdivision, length is 1500mm, and thickness is the bamboo cane of 1.5mm;By the bamboo cane It is placed in the phenolic resin that solid content is 35% and impregnates 15min, then drenches dry 1-2h until tack-free;The bamboo cane after doing will be drenched By rift grain direction assembly, the slab of 800 × (300-600) mm is ultimately formed;It is placed in 140 DEG C of temperature and unit pressure 3-5MPa Under the conditions of, die press hot-press solidifying shaping, hot pressing time is calculated according to slab thickness according to 0.2min/mm.

(3) it is 140g/m according to glue-spread by monocomponent polyurethane or water-based ethylene based polyurethanes2It is coated on Recombined bamboo table Face, cutting is carried out according to the size of Recombined bamboo to laminated veneer lumber, then that laminated veneer lumber is coated around Recombined bamboo;By group Bamboo and wood combined column after base is placed in die press carries out curing molding of colding pressing, and surrounding is pressurizeed simultaneously, and pressure is 0.5-1MPa, when Between be 1.5h.

Embodiment 4

The preparation of mao bamboon meaning Yang Fuhe square columns

(1) preparation of meaning poplar veneer.Process is:Meaning Yang Yuanmu-block-juggle softening-peeling-rotary-cut-shearing-repairing- Bevel grinding.It is 1500mm into width by meaning poplar rounding, length is 2500mm, thickness is the veneer of 3.0mm;Moisture content need not Especially control;By, by phenolic resin bonding, wherein single plate double side glue-spread is 300g/m after 60 layers of veneer rift grain group embryo2;Apply Veneer gluing is carried out using " high frequency precompressed and hot pressing " technique after glue, specifically in output high frequency power be 10KW and pressure is 3-15min is preheated on high frequency press under the conditions of 1.0MPa, then on 150 DEG C of temperature, the hot press of pressure 1.0-1.2MPa Hot pressing is carried out, hot pressing time is calculated according to 0.5-1.5min/mm.By the product cooling after hot pressing, sawing.

(2) preparation of mao bamboon recombinant material.Process is:Mao bamboon raw material-radial direction subdivision-bamboo cane drying-impregnation-pouring do-mats formation- Hot pressing-sawing.It is that width is 10mm by mao bamboon radial direction subdivision, length is 3000mm, and thickness is the bamboo cane of 2.0mm;By the bamboo Bar is placed in the phenolic resin that solid content is 35% and impregnates 15min, then drenches dry 1-2h until tack-free;The bamboo after doing will be drenched Bar presses rift grain direction assembly, ultimately forms the slab of 800 × (300-600) mm;It is placed in 140 DEG C of temperature and unit pressure 3- Under the conditions of 5MPa, die press hot-press solidifying shaping, hot pressing time is calculated according to slab thickness according to 0.2min/mm.

(3) it is 180g/m according to glue-spread by monocomponent polyurethane or water-based ethylene based polyurethanes2It is coated on Recombined bamboo table Face, cutting is carried out according to the size of Recombined bamboo to laminated veneer lumber, then that laminated veneer lumber is coated around Recombined bamboo;By group Bamboo and wood combined column after base is placed in die press carries out curing molding of colding pressing, and surrounding is pressurizeed simultaneously, and pressure is 0.5-1MPa, when Between be 1.5h.

The performance comparison of embodiment 1-4 and comparative example 1-3:

From the point of view of attractive in appearance and parallel-to-grain compressive strength, the bamboo and wood combined column of the present invention adopts periphery for laminated veneer lumber, middle For Recombined bamboo core, this structure can fully demonstrate the natural aesthetic feeling of wood figure, the pressure resistance of post can be greatly improved again Degree and elastic modelling quantity.

Claims (10)

1. a kind of bamboo and wood is combined square column, it is characterised in that periphery is laminated veneer lumber, middle for Recombined bamboo core, laminated veneer lumber Using monocomponent polyurethane or water-based ethylene based polyurethanes bonding between material and Recombined bamboo core.
2. bamboo and wood described in claim 1 is combined the preparation method of square column, it is characterised in that comprise the following steps:
(1) preparation of laminated veneer lumber:Fast growing wood is peeled into veneer and is pre-processed, then with multilayer fast growing wood veneer Jing Cross sawing after gluing, rift grain assembly, pressure gluing to be formed;
(2) preparation of Recombined bamboo core:Dipping in the phenolic resin that solid content is 35% will be placed on after raw bamboo radial direction subdivision to drench It is dry, hot-press solidifying shaping;
(3) embryo and pressing and forming are organized:The Recombined bamboo core of step (2) is placed in into centre, the laminated veneer lumber of step (1) is placed in weight Group bamboo core surrounding, using being placed in cold moudling in die press after monocomponent polyurethane or water-based ethylene based polyurethanes bonding.
3. preparation method according to claim 2, it is characterised in that in step (1), fast growing wood is peeled into veneer, is Refer to that it is 900-1500mm that fast growing wood is peeled into width, length is 2000-2500mm, and thickness is the veneer of 2.0-3.0mm.
4. preparation method according to claim 2, it is characterised in that in step (1), with multilayer fast growing wood veneer through applying Glue, rift grain assembly, pressure are glued, refer to and will pass through phenolic resin bonding, wherein single plate double side after 40-60 layer veneer rift grain group embryos Glue-spread is 250-300g/m2
5. preparation method according to claim 4, it is characterised in that carried out using " high frequency precompressed and hot pressing " technique after gluing Veneer gluing, it is pre- on high frequency press under the conditions of being specifically 0.5-1.0MPa for 3.5-10KW and pressure in output high frequency power Hot 3-15min, then carries out hot pressing on temperature 130-150 DEG C, the hot press of pressure 1.0-1.2MPa, hot pressing time according to 0.5-1.5min/mm is calculated.
6. preparation method according to claim 2, it is characterised in that in step (2), raw bamboo radial direction subdivision is referred to original It is 5-10mm that bamboo radial direction subdivision is width, and length is 1500-3000mm, and thickness is the bamboo cane of 1.5-2.0mm.
7. preparation method according to claim 2, it is characterised in that in step (2), the bamboo cane is placed on into solid content is 15min is impregnated in 35% phenolic resin, dry 1-2h is then drenched until tack-free;The bamboo cane drenched after doing is pressed into rift grain direction group Base, ultimately forms the slab of 800 × (300-600) mm;Under the conditions of being placed in 140 DEG C of temperature and unit pressure 3-5MPa, mould Press hot-press solidifying is molded, and hot pressing time is calculated according to slab thickness according to 0.2min/mm.
8. preparation method according to claim 2, it is characterised in that in step (3), by monocomponent polyurethane or water-based ethylene Based polyurethanes are coated on Recombined bamboo surface, cutting are carried out to laminated veneer lumber according to the size of Recombined bamboo, then by laminated veneer lumber Material is coated around Recombined bamboo.
9. preparation method according to claim 2, it is characterised in that in step (3), glue-spread is 140-180g/m2
10. preparation method according to claim 2, it is characterised in that in step (3), the bamboo and wood combined column after assembly is put Cold moudling is carried out in die press, surrounding is pressurizeed simultaneously, and pressure is 0.5-1MPa, and the time is 1.5h.
CN201611206256.3A 2016-12-23 2016-12-23 A kind of compound square column of bamboo and wood and preparation method thereof CN106625960B (en)

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CN106625960B CN106625960B (en) 2019-06-14

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CN1462676A (en) * 2003-06-18 2003-12-24 中国林业科学研究院木材工业研究所 Bamboo section material for building construction and its manufacturing method
JP2006255911A (en) * 2005-03-15 2006-09-28 Tadashi Kunitake Bamboo laminated structural member and its manufacturing method
CN1792584A (en) * 2005-11-08 2006-06-28 南京林业大学 Method for producing single plate laminated floor board by middle and small diameter grade rotation cutted wood material
CN201275782Y (en) * 2008-09-10 2009-07-22 郎雨 Bamboo-wood composite type sectional material
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