CN203331157U - Sandwich structure bamboo and wood composite recombinant structure material - Google Patents
Sandwich structure bamboo and wood composite recombinant structure material Download PDFInfo
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- CN203331157U CN203331157U CN2013202291657U CN201320229165U CN203331157U CN 203331157 U CN203331157 U CN 203331157U CN 2013202291657 U CN2013202291657 U CN 2013202291657U CN 201320229165 U CN201320229165 U CN 201320229165U CN 203331157 U CN203331157 U CN 203331157U
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Abstract
The utility model relates to a sandwich structure bamboo and wood composite recombinant structure material, which uses recombinant bamboos, wood veneers, adhesive and polymers as raw materials, wherein the recombinant bamboos are adhered to a hollow square column with a square or a rectangular section, a layer of wood veneer is arranged between connecting positions of the recombinant bamboos which are adhered with each other, and foam which is formed by solidifying the polymers is filled in a middle hollow part of the hollow square column. The sandwich structure bamboo and wood composite recombinant structure material can be used for beams, columns, furniture and large outdoor floors.
Description
Technical field
The utility model belongs to wood-based plate and the manufacturing technology field thereof in industry of artificial boards, is particularly useful for mechanical property requirements high, building and the Engineered Wood Products such as the beam that specification is large, post, furniture and floor.
background technology
Recombined bamboo is through after discongesting and forming the bamboo bundle by bamboo wood, a kind of novel building and the Engineered Wood Products that through operations such as super-dry, impregnation, drying, assembly and gummeds, process again, there is good physical and mechanical property, Recombined bamboo is directly used in to beam, post, furniture and floor etc., often cause the intensity surplus, cause waste; In the process of restructuring, the density of this material reaches 1.05～1.30g/cm
3, because the material deadweight is larger, easily cause and use inconvenience.
Secondly, the production technology of Recombined bamboo mainly is divided into two large classes: a class is cold forming, heat curing process, is called for short cold-press process; The 2nd, use for reference wood-based plate tradition heat pressing process, the Recombined bamboo heat pressing process of formation.Restriction due to the specification that is subject to cold press and hot press device, at present, the specification of Recombined bamboo is all less, and the specification that the Recombined bamboo square stock of producing as cold-press method is commonly used (long * wide * thick) is: 193cm * 10.5 * 15.0 and 200cm * 14.5cm * 15.0; The Recombined bamboo stock size that heat pressing process is produced (long * wide * thick) is: the cm of 244cm * 122cm * (1.5-4), maximum breadth also can only reach 500 * 120cm * 5cm (Yu Wenji, China's Recombined bamboo industry development present situation and trend analysis, timber industry, 2012,26 (1): 11-14).Such specification is difficult to meet the specification requirement of structural wood as beam, post, large-scale furniture and large specification floor.
Moreover the structural wood of large specification adopts Lengthwise joint by the material of small dimension usually, laterally spell widely, and the compound splicing of recombinating forms.Glued joint bad meeting and cause the decline of plate property, glued joint common defect type and comprise: come unstuck, crack, air strike, bondline thickness variation, solidify not exclusively and surface preparation defect etc., wherein, come unstuck, crack and surface preparation defect be main.The principal element that affects adhesive bonding of composites intensity has: the impact of the factors such as the material category of connected piece, the ratio of rigidity of connected piece and thermal coefficient of expansion, make whenever possible by the rigidity approximately equal of bonded part as far as possible, close (the beneficial little Su of thermal expansion and moisture expantion, the composite handbook, Chemical Industry Press, 2009).
According to previous research: form good splicing prerequisite and be the adhesive molecule and gluedd joint material (timber) and can fully contact and effective wetting (Gu Jiyou, adhesive and coating, China Forest publishing house, 1999).Recombined bamboo is that a kind of porous natural material timber or bamboo wood act on compacted under at larger pressure (the about 60MPa of cold-press method briquetting pressure, pressure sintering briquetting pressure 4～6MPa), and the density of Recombined bamboo generally is greater than 1.0g/cm
3when environment temperature and humidity variation, the distortion such as easement, crosswise concaving, warpage can occur, can produce phenomenon (Yu Wenji, China's Recombined bamboo industry development present situation and trend analysis, timber industries such as jumping silk and cracking when serious, 2012,26 (1): 11-14), even adopt sanding in process, also be difficult to obtain smooth cemented surface; Secondly, in the manufacture process of Recombined bamboo, more even for adhesive is distributed, usually adopt dipping method, bamboo bundle and wood bundle are by after impregnation, and one deck adhesive has all been wrapped up on surface, after solidifying, formed the glue-line of the insoluble not molten densification of one deck, surface wettability descends; Moreover, Recombined bamboo intensity is high, hardness is large, be difficult to compressed, but be subject to the Traditional Thinking impact, while selecting bonded part, select the rigidity approximately equal as far as possible, the material that thermal expansion and moisture expantion are close, usually can not consider to introduce the third material except adhesive, therefore, the bad problem of Recombined bamboo spot gluing of the adhesive defect, particularly high rigidity such as coarse surface, the splicing face that is difficult to compression and bad wetability is come unstuck in the easy generation of post forming process, crack, air strike, bondline thickness variation fails effectively to be solved all the time.
Summary of the invention
The purpose of this utility model is to improve the deficiency in existing technology, provides sandwich structure bamboo wood compound recombination structure material, makes its physical and mechanical property meet the requirement of structural wood performance.
For achieving the above object, the utility model is taked following technical scheme:
The utility model provides a kind of sandwich structure bamboo wood compound recombination structure material, it comprises two front plate, two side panels, veneer, polymer and adhesives, it is the square or rectangular hollow square column that two front plate and two side panels compose cross section mutually, and described front plate and side panel are Recombined bamboo; Between two front plate of described mutual gummed and side panel junction, one deck veneer is set, the thickness of described veneer is 0.1-1.5mm; Be provided with adhesive layer between Recombined bamboo and veneer; Adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive; In the middle of described hollow square column, hollow parts is filled with the foam formed by polymer cure; Described polymer is polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, the mixture of one or more compositions in PEI and styrene acrylonitrile.
The weld of two front plate of described mutual gummed and two side panels is an angle of 90 degrees or miter angle.
Described front plate and side panel are to be formed through Lengthwise joint by Recombined bamboo, and the composition surface of Lengthwise joint is provided with adhesive layer, and adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive.
The Recombined bamboo of described Lengthwise joint is provided with a layer paperboard between the composition surface of Lengthwise joint, between Recombined bamboo and cardboard, is provided with adhesive layer, and adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive.
Described spreading is finger spreading or mitered spreading.
The compound recombination structure material of sandwich structure bamboo wood that the utility model provides, adopt sandwich structure, reduced significantly the density of material, and production technology is simple; Reduce costs; The ratio of strength to weight is large.
In addition, but the compressible deformation of one deck is set between the Recombined bamboo high in hardness, that strength and stiffness are large, thickness 0.1-1.5mm veneer veneer, this splicing face structural design, but take full advantage of wetability, permeability, gummed and the characteristics such as compressible and deformation that veneer is good, utilize veneer veneer deformation behavior, can effectively fill up the gap formed due to the cemented surface injustice between the Recombined bamboo that hardness is high, strength and stiffness are large, thereby increase effective cemented surface; Utilize wetability and gummed property that the veneer veneer is good, can form good cemented surface with Recombined bamboo, improve glue performance; When secondary gluing, utilize permeability and the compression performance of veneer, under exerted pressure effect, make veneer veneer compression compact, simultaneously, the agent of resorcinol gluing or aquosity polymer isocyanic ester gluing can be penetrated in the veneer veneer fully, with the veneer veneer, gummed occur and react, thereby form the compressed wood close with the Recombined bamboo performance.This splicing face structural design, utilized dexterously the characteristic of Recombined bamboo and veneer veneer, large specification Recombined bamboo bonding layer after making to glue together meets the rigidity approximately equal of bonded part, the traditional classical splicing face gummed theory that thermal expansion and moisture expantion are close, solved again the adhesive defects such as Recombined bamboo comes unstuck, crack, air strike, bondline thickness variation.
The compound recombination structure material of sandwich structure bamboo that the utility model provides wood, when Lengthwise joint, is provided with a layer paperboard between the composition surface of Lengthwise joint, and cardboard is basic identical in the effect of weld and above-mentioned veneer veneer, repeats no more here.Why, when Lengthwise joint, select cardboard, reason is as follows: with the veneer veneer, compare, but, except good wetability, permeability, gummed and the characteristics such as compressible and deformation, flexibility and the plasticity of cardboard are better.It is special-shaped curved being often referred to junction and miter, and cardboard can be designed according to the shape of finger face and miter, thereby the splicing face of making is more identical, the adhesive defects such as the minimizing of energy maximum constraints is come unstuck, crack, air strike, bondline thickness variation.
The compound recombination structure material of sandwich structure bamboo wood that the utility model provides is in Lengthwise joint and restructuring recombination process, adopt the two component isocyanate adhesives of cold curing adhesive or resorcinol adhesive, can according to target product need to be compound in the restructuring of length and thickness direction, meet the large-sized specification requirement of structural wood.
The compound recombination structure material of sandwich structure bamboo wood that the utility model provides, in the Recombined bamboo manufacture process, select impregnating phenolic resin or dipping to use pollopas, makes bamboo bundle or wood bundle reach even impregnation, thereby obtain the Recombined bamboo of stable performance.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is not limitation of the utility model, every any this area of carrying out according to the utility model disclosure be equal to replacement, all belong to protection domain of the present utility model.
The accompanying drawing explanation
Fig. 1 Recombined bamboo finger face
Fig. 2 cardboard finger face
Fig. 3 Recombined bamboo finger spreading
Recombined bamboo after Fig. 4 finger spreading
Fig. 5 veneer
Fig. 6 weld is the compound recombination structure material slab of an angle of 90 degrees sandwich structure bamboo wood
Fig. 7 weld is an angle of 90 degrees sandwich structure bamboo wood compound recombination structure material (profile)
Fig. 8 weld is the compound recombination structure material of an angle of 90 degrees sandwich structure bamboo wood
Fig. 9 Recombined bamboo oblique section
Figure 10 cardboard oblique section
Figure 11 Recombined bamboo mitered spreading
Recombined bamboo after Figure 12 mitered spreading
Figure 13 weld is the compound recombination structure material slab of an angle of 90 degrees sandwich structure bamboo wood
Figure 14 weld is miter angle sandwich structure bamboo wood compound recombination structure material (profile)
Figure 15 weld is the compound recombination structure material of miter angle sandwich structure bamboo wood
The specific embodiment
Embodiment 1: weld is the compound recombination structure material of an angle of 90 degrees sandwich structure bamboo wood
The compound recombination structure material of sandwich structure bamboo wood of the utility model exemplary embodiments, the Recombined bamboo that it comprises vertical finger spreading (1), cardboard (2), veneer (3), adhesive (not marking in figure) and the foam (4) formed by polymer cure, as shown in Figure 8, it is the square or rectangular hollow square column that two front plate and two side panels compose cross section mutually, and front plate (11) and side panel (12) are Recombined bamboo; Glue together between two front plate and side panel junction one deck veneer (3) is set, the thickness of veneer (3) is 1.2mm; Be provided with adhesive layer between Recombined bamboo (1) and veneer (3), adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive; The weld of gummed two front plate (11) and side panel (12) is an angle of 90 degrees mutually; In the middle of described hollow square column, hollow parts is filled with the foam (4) formed by polymer cure; Described polymer is polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, the mixture of one or more compositions in PEI and styrene acrylonitrile.
The compound recombination structure material manufacture method typical case of the utility model sandwich structure bamboo wood implementation step is as follows:
1, by discongesting, drying, impregnation, drying, gummed, maintenance, cutting edge, saw cuts and sanding workshop section, bamboo processing is become (long * wide * thick) be: the Recombined bamboo of 220cm * 20cm * 3.0cm; The adhesive used in the impregnation operation is impregnating phenolic resin, in hot pressing process, adopts pressure sintering Restruction bamboo, belongs to prior art;
2, above-mentioned Recombined bamboo is milled into to finger joint teeth as shown in Figure 1 by tooth milling machine, the long 25mm of tooth, tooth top width 10mm, tooth pitch 20mm, tooth refers to gradient 1/8.
3, take resorcinol gluing agent host and curing agent according to 100: 15 ratios, mix, after stirring, form the agent of the uniform resorcinol gluing of even host and curing agent;
4, cardboard is processed into to dentalation as shown in Figure 2, the long 25mm of tooth, tooth top width 10mm, tooth pitch 20mm, tooth refers to gradient 1/8.
5, the resorcinol gluing agent after the finger face is coated with the above allotment, glue-spread is 300g/m
2, or according to the area a m before cardboard processing
2, adopt the impregnation mode, the cardboard finger is entered in adhesive, impregnation resin content is (300 * a) g; According to assembly shown in Fig. 3, adopt two ends to overstock to centre the sheet material after assembly the Recombined bamboo finger-jointed plate after gluing, the finger place is combined closely, the sheet material after the finger spreading as shown in Figure 4.
6, by rotary-cut, drying, cutting edge workshop section, it is 33cm that timber is processed into to width, the veneer bar that thickness is 1.0mm, as shown in Figure 5;
7, the resorcinol gluing agent after veneer is coated allotment, glue-spread is 300g/m
2;
8, described two front plate and two side panels are being glued together to junction mutually by being an angle of 90 degrees combination, two front plate of gummed and side panel arrange one deck veneer between connecting mutually, by the earthwork, are assemblies, through composing cross section, are the square or rectangular hollow square column.
9, adopt gunite, by polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, one or more polymer in PEI and styrene acrylonitrile are ejected into the hollow position in described hollow square column equably, through solidifying to form foam.
10, by the compound recombination structure material slab of described sandwich structure bamboo wood, through overload limit, saw cut, the workshop section such as sanding, be processed into the compound recombination structure material of sandwich structure bamboo wood as shown in Figure 7.
The compound recombination structure material of sandwich structure bamboo wood of the utility model exemplary embodiments, the Recombined bamboo that it comprises vertical mitered spreading (1), cardboard (2), veneer (3), adhesive (not marking in figure) and foam (4), as shown in figure 14, it is the square or rectangular hollow square column that two front plate and two side panels compose cross section mutually, and front plate (11) and side panel (12) are Recombined bamboo; Glue together between two front plate and side panel junction one deck veneer (3) is set, the thickness of veneer (3) is 1.0mm; Be provided with adhesive layer between Recombined bamboo (1) and veneer (3), adhesive used is the aquosity polymer isocyanic ester adhesive; The weld of gummed two front plate (11) and side panel (12) is miter angle mutually; In the middle of described hollow square column, hollow parts is filled with the foam (4) formed by polymer cure; Described polymer is polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, the mixture of one or more compositions in PEI and styrene acrylonitrile.
The compound recombination structure material manufacture method typical case of the utility model sandwich structure bamboo wood implementation step is as follows:
1, by discongesting, drying, impregnation, drying, gummed, maintenance, cutting edge, saw cuts and sanding workshop section, timber is processed into to (long * wide * thick) to be: the Recombined bamboo of 180cm * 140cm * 4cm; The adhesive used in the impregnation operation is impregnating phenolic resin, in gluing technique, adopts cold-press method, belongs to prior art;
2, the both sides of above-mentioned Recombined bamboo are mitered into to the inclined-plane of miter angle;
3, above-mentioned Recombined bamboo two ends are sawn into to oblique section as shown in Figure 9, the thickness at mitered position and chamfer length ratio are 1: 10;
4, take according to 100: 18 ratios host and the curing agent that emulsion polymer isocyanate adhesive sticks agent, uniformly mix evenly;
5, by cardboard, by being processed into ramp structure as shown in figure 10, the thickness at mitered position and chamfer length ratio are 1: 10;
6, the glutinous agent of the emulsion polymer isocyanate adhesive after miter is coated with the above allotment, glue-spread is 250g/m
2, or according to the area am of cardboard miter
2, adopt the impregnation mode, cardboard is immersed in adhesive, impregnation resin content is (250 * a) g; According to assembly shown in Figure 11, adopt two ends to overstock to centre the sheet material after assembly the Recombined bamboo after gluing, the mitered place is combined closely, the sheet material after the mitered spreading as shown in figure 12;
7, by rotary-cut, drying, cutting edge workshop section, it is 6cm that timber is processed into to width, the specification veneer that thickness is 0.8mm, as shown in Figure 5;
8, the emulsion polymer isocyanate adhesive after veneer is coated allotment sticks agent, and glue-spread is 250g/m
2;
9, described two front plate and two side panels, are mutually glued together between two front plate and side panel connection one deck veneer is set by being the miter angle combination in gummed junction mutually, are assemblies by the earthwork, through composing cross section, be the square or rectangular hollow square column, as shown in figure 13;
10, adopt gunite, by polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, one or more polymer in PEI and styrene acrylonitrile are ejected into the hollow position in described hollow square column equably, through solidifying to form foam;
11, the workshop sections such as by the compound recombination structure material slab of described sandwich structure bamboo wood, process cutting edge, saw cut, sanding, be processed into the compound recombination structure material of sandwich structure bamboo wood as shown in Figure 14 and Figure 15.
Claims (5)
1. the compound recombination structure material of sandwich structure bamboo wood, it comprises two front plate, two side panels, veneer, polymer and adhesives, it is characterized in that: it is the square or rectangular hollow square column that two front plate and two side panels compose cross section mutually, and described front plate and side panel are Recombined bamboo; Between two front plate of described mutual gummed and side panel junction, one deck veneer is set, the thickness of described veneer is 0.1-1.5mm; Be provided with adhesive layer between Recombined bamboo and veneer; Adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive; In the middle of described hollow square column, hollow parts is filled with the foam formed by polymer cure; Described polymer is a kind of in polyvinyl chloride, polystyrene, polyurethane, polymethylacrylic acid acid amides, PEI and styrene acrylonitrile.
2. the compound recombination structure material of a kind of sandwich structure bamboo wood according to claim 1, it is characterized in that: the weld of two front plate of described mutual gummed and two side panels is an angle of 90 degrees or miter angle.
3. the compound recombination structure material of a kind of sandwich structure bamboo wood according to claim 1, it is characterized in that: described front plate and side panel are to be formed through Lengthwise joint by Recombined bamboo, the composition surface of Lengthwise joint is provided with adhesive layer, and adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive.
4. the compound recombination structure material of a kind of sandwich structure bamboo wood according to claim 3, it is characterized in that: also include cardboard, the Recombined bamboo of described Lengthwise joint is provided with a layer paperboard between the composition surface of Lengthwise joint, be provided with adhesive layer between Recombined bamboo and cardboard, adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive.
5. the compound recombination structure material of a kind of sandwich structure bamboo wood according to claim 3, it is characterized in that: described spreading is finger spreading or mitered spreading.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802227A (en) * | 2014-01-26 | 2015-07-29 | 廊坊华日家具股份有限公司 | Composite energy-saving light-weight material and preparing method thereof |
| CN104802239A (en) * | 2014-01-26 | 2015-07-29 | 廊坊华日家具股份有限公司 | Hollow finger-jointed recombined bamboo furniture material and manufacturing method thereof |
| CN109877919A (en) * | 2019-03-28 | 2019-06-14 | 南京林业大学 | A kind of integral bamboo flawless spreading bamboo plate compounding rectangular beam and processing technology |
| CN114351512A (en) * | 2021-12-17 | 2022-04-15 | 安徽森泰木塑集团股份有限公司 | Biomass sleeper and preparation method thereof |
-
2013
- 2013-04-25 CN CN2013202291657U patent/CN203331157U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802227A (en) * | 2014-01-26 | 2015-07-29 | 廊坊华日家具股份有限公司 | Composite energy-saving light-weight material and preparing method thereof |
| CN104802239A (en) * | 2014-01-26 | 2015-07-29 | 廊坊华日家具股份有限公司 | Hollow finger-jointed recombined bamboo furniture material and manufacturing method thereof |
| CN109877919A (en) * | 2019-03-28 | 2019-06-14 | 南京林业大学 | A kind of integral bamboo flawless spreading bamboo plate compounding rectangular beam and processing technology |
| CN109877919B (en) * | 2019-03-28 | 2023-09-26 | 南京林业大学 | Whole bamboo crack-free unfolding bamboo flat plate composite rectangular beam and processing technology |
| CN114351512A (en) * | 2021-12-17 | 2022-04-15 | 安徽森泰木塑集团股份有限公司 | Biomass sleeper and preparation method thereof |
| CN114351512B (en) * | 2021-12-17 | 2024-03-19 | 安徽森泰木塑集团股份有限公司 | Biomass sleeper and preparation method thereof |
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| CP03 | Change of name, title or address |
Address after: 242200 Anhui city in Xuancheng Province Economic Development Zone Guangde China Road No. 27 Patentee after: ANHUI HONGYU BAMBOO INDUSTRY TECHNOLOGY CO.,LTD. Address before: The 242200 Anhui Economic Development Zone of Guangde province of China Road No. 88 Patentee before: ANHUI HONGYU BAMBOO PRODUCTS Co.,Ltd. |
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Effective date of registration: 20170103 Address after: 242000 Anhui economic and Technological Development Zone, Xuancheng science and Technology Park B24 building, floor, floor, 3, Patentee after: Anhui Guanfu Jing Phyllostachys Technology Co.,Ltd. Address before: 242200 Anhui city in Xuancheng Province Economic Development Zone Guangde China Road No. 27 Patentee before: ANHUI HONGYU BAMBOO INDUSTRY TECHNOLOGY CO.,LTD. |
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