CN2261329Y

CN2261329Y - Bamboo-wood composite multi-ply

Info

Publication number: CN2261329Y
Application number: CN 96231500
Authority: CN
Inventors: 张齐生; 孙丰文
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 1996-03-26
Filing date: 1996-03-26
Publication date: 1997-09-03
Anticipated expiration: 2006-03-26

Abstract

The utility model relates to a bamboo-wood composite multi-ply which uses bamboo sheets as a surface material and uses veneers as a sandwich layer material; the veneers is processed by a Chinese red pine, or intermediate cutting materials of other tree species with a small diameter class or a brushwood. The utility model is characterized in that two layers of face plates and multilayer core plate are basically and longitudinally arranged and assembled according to the same fibre direction. A wooden rotary cut thin veneer, both sides of which are coated with glue is respectively arranged between the bamboo sheet and the veneer, and between the veneer and the veneer. Compared with the bamboo plywood, the bamboo-wood composite multi-ply with a new structure has the advantages of light weight, high strength, reasonable material use, economization, easy fabrication, easy guarantee of the gluing quality, etc.

Description

Laminated bamboo-wood composite lumber

The utility model belongs to the wood-based plate manufacturing technology in the timber industry.

The present employed flat car of railway transportation, owing to must guarantee that base plate has high as far as possible intensity, absorbing, resistance to shock, it is the high-quality deal board manufacturing of 70 millimeter that existing base plate mainly adopts thickness.Along with the worsening shortages of the forest reserves in the world wide, the price of the big footpath of timber, especially high-quality level timber also goes up thereupon, and manufacturing cost is more and more higher, and it is also fewer and feweri to originate.The due intensity of railway platform truck base plate, absorbing, resistance to shock and cost, existing various wood-based plates all are difficult to satisfy as common multilayer wooden plywood, bamboo plywood (CNZL 91108203.4) etc.

The purpose of this utility model provides a kind of laminated bamboo-wood composite lumber, with under the prerequisite that guarantees machinery, physical property and not obvious increase cost, satisfies the instructions for use of different user in larger scope.

Technical solution of the present utility model is, is surface material with the bamboo wood, is core material with thinnings of masson pine or other small diameter grade seeds or the veneer that brush wood is processed into.Two-layer panel (bamboo chip) and multilayer central layer (veneer) are arranged assembly by same machine direction (vertically) basically; Between bamboo chip and veneer, veneer and veneer, add the wooden rotary-cut thin veneer of a double spread again, under certain pressure and temperature, can compose the laminated bamboo-wood composite lumber of desired properties.

The description of the drawings:

Fig. 1 is the structural representation of laminated bamboo-wood composite lumber.(1) is the surface layer bamboo chip among the figure, and (2) are the sandwich layer veneer, and (3) are the wooden rotary-cut thin veneer of gluing.

Embodiment 1:

The manufacture method of being introduced with CNZL 91108203.4, with mao bamboon block, go acromere, subdivision, remove internal segment, bamboo chips that make, 3.5～5.0 millimeters thick are surface material behind the poach, hot mastication, pressurization expansion, roll-in flattening, planing operation, dry setting, the veneer of 8～12 millimeters thick that are processed into thinnings or the brush wood of masson pine or other small diameter grade seeds is a core material.Two-layer panel (bamboo chip) and 4 layers of central layer (veneer) are all arranged assembly by same machine direction (vertically); The wooden rotary-cut thin veneer that between bamboo chip and veneer, veneer and veneer, adds 5 double spread phenolic resin glues, 1.5～2.0 millimeters thick again, the machine direction of rotary-cut thin veneer and bamboo chip vertical with veneer (transversely arranged) assembly, the pressurization of in hot press, heating.Slab after the hot pressing can obtain the laminated bamboo-wood composite lumber of thickness more than 45 millimeters after edging, sanding.

The important technological parameters of laminated bamboo-wood composite lumber is as follows:

Product thickness: 〉=45mm

Density :≤0.65

MOR: vertically 〉=75MPa

Laterally 〉=25MPa

Embodiment 2:

The mao bamboon planing operation is become the bamboo chip of 3.5～5.0 millimeters thick, and be surface material with the bamboo chip that processes, the veneer of 8～12 millimeters thick that are processed into thinnings or the brush wood of masson pine or other small diameter grade seeds is a core material.Wooden rotary-cut thin veneer by two-layer panel (bamboo chip), 5 layers of central layer (veneer) and 6 double spread phenolic resin glues carries out assembly, 4 layers of veneer in outer bamboo chip and two outsides are all arranged assembly by same machine direction (vertically), the machine direction and bamboo chip vertical with other veneer (transversely arranged) assembly of middle 1 layer of veneer; The wooden rotary-cut thin veneer that between bamboo chip and veneer, veneer and veneer, respectively adds 1 (totally 6) double spread phenolic resin glue, the machine direction of rotary-cut thin veneer vertical with the surface layer bamboo chip (transversely arranged) assembly, the pressurization of in hot press, heating.Slab after the hot pressing can obtain the laminated bamboo-wood composite lumber of thickness more than 55 millimeters after edging, sanding.

Product thickness: 〉=55mm

Density :≤0.65

MOR: vertically 〉=60MPa

Laterally 〉=30MPa

Embodiment 3:

As surface material, other is with embodiment 1 or 2 with bamboo board or other bamboo fiber board.

The laminated bamboo-wood composite lumber of new construction is compared with bamboo plywood has following advantage:

1. in light weight---the density of laminated bamboo-wood composite lumber≤0.65, and the density of bamboo plywood 〉=0.85, each cube The quality of rice material can alleviate 200 kilograms;

2. intensity is big---because the permutation and combination of bamboo chip and wooden thin plate, bamboo chip and the big characteristics of the unidirectional intensity of wooden thin plate have been kept, and the intensity than single bamboo wood or timber is more even, the laminated bamboo-wood composite lumber of 45 millimeters thick can replace the deal board of 70 millimeters thick to make the use of railway platform truck base plate;

3. materials are rationally saved---and compare with bamboo plywood, high-quality mao bamboon consumption can reduce 70%, and can make full use of small dimension wood, thinnings;

4. easy to process, and bonding quality is guaranteed easily.

Therefore, laminated bamboo-wood composite lumber can satisfy the source that obviously reduces product cost under the prerequisite of instructions for use and enlarge material.

Claims

1. one kind is surface material with the bamboo chip, with thinnings of masson pine or other small diameter grade seeds or the veneer that brush wood is processed into is the made laminated bamboo-wood composite lumber of core material, it is characterized in that two-layer panel and multilayer central layer vertically arrange assembly by same machine direction basically; The wooden rotary-cut thin veneer that between bamboo chip and veneer, veneer and veneer, adds a double spread again.