Summary of the invention
The purpose of this utility model is to improve the deficiency in existing technology, and hollow mitered Recombined bamboo structural wood is provided, and 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 hollow mitered Recombined bamboo structural wood, it comprises two front plate, two side panels and adhesive, two front plate and two side panels compose the hollow square column that cross section is square or rectangular mutually, described front plate and side panel are that the weld of two front plate of described mutual gummed and two side panels is an angle of 90 degrees or miter angle by the vertical mitered spreading of Recombined bamboo process; Adhesive used is the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive.
Described a kind of hollow mitered Recombined bamboo structural wood, also include veneer, between two front plate of described mutual gummed and side panel junction, one deck veneer is set, and 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;
Described a kind of hollow mitered Recombined bamboo structural wood, also include cardboard, the Recombined bamboo of described vertical mitered spreading 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.
The hollow mitered Recombined bamboo structural wood that the utility model provides, adopt the hollow square column 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 the good wetability of veneer, permeability, gummed and the characteristics such as compressible and deformation, utilize veneer veneer deformation behavior, can effectively fill up the gap that forms 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 the good wetability of veneer veneer and gummed property, can form good cemented surface with Recombined bamboo, improve glue performance; When secondary gluing, utilize permeability and the compression performance of veneer, under the effect of exerting pressure, make veneer veneer compression compact, simultaneously, the agent of resorcinol gluing or aquosity polymer isocyanic ester adhesive can be penetrated in the veneer veneer fully, with the veneer veneer, the gummed reaction occur, 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, make large specification Recombined bamboo bonding layer after gummed meet 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, space, bondline thickness variation.
The hollow mitered Recombined bamboo structural wood that the utility model provides when Lengthwise joint, is provided with a layer paperboard between the composition surface of Lengthwise joint, 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: compare with the veneer veneer, but except good wetability, permeability, gummed and the characteristics such as compressible and deformation, flexibility and the plasticity of cardboard are better.Usually miter is special-shaped curved, and cardboard can design according to the shape of miter, thereby the splicing face of making is more identical, can reduce to greatest extent come unstuck, the adhesive defects such as crack, space, bondline thickness variation.
The hollow mitered Recombined bamboo structural wood that the utility model provides is in Lengthwise joint and restructuring recombination process, adopt the namely 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 hollow mitered Recombined bamboo structural wood that the utility model provides, in the Recombined bamboo manufacture process, select impregnating phenolic resin or dipping to use Lauxite, makes bamboo bundle or wood bundle reach even impregnation, thereby obtain the Recombined bamboo of stable performance.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, 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 specific embodiment
Embodiment 1: weld is the hollow mitered Recombined bamboo of an angle of 90 degrees structural wood
The hollow mitered Recombined bamboo structural wood of the utility model exemplary embodiments, it comprises Recombined bamboo (1), cardboard (2), veneer (3) and the adhesive (not marking in figure) of vertical toe joint spreading, as shown in Figure 8, it is the square hollow square column that two front plate and two side panels compose cross section mutually, front plate (11) and side panel (12) are the vertical mitered spreading of Recombined bamboo process, 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 aquosity polymer isocyanic ester adhesive; The weld of gummed two front plate (11) and side panel (12) is an angle of 90 degrees mutually.
The hollow mitered Recombined bamboo of the utility model structural wood manufacture method typical case implementation step is as follows:
1, by discongesting, drying, impregnation, drying, gummed, maintenance, cutting edge, saw cut and sanding workshop section again, bamboo processing are 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 two ends are sawn into as shown in Figure 1 oblique section, the thickness at mitered position and chamfer length ratio are 1: 10;
3, take aquosity polymer isocyanic ester adhesive host and curing agent according to 100: 15 ratios, mix, after stirring, form host and the uniform aquosity polymer isocyanic ester adhesive of curing agent;
4, by being processed into ramp structure as shown in Figure 2, the thickness at mitered position and chamfer length ratio are 1: 10 with cardboard;
5, 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 3, 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 4;
6, by rotary-cut, drying, cutting edge workshop section, it is 33cm that timber is processed into width, and thickness is the veneer bar of 1.0mm, as shown in Figure 5;
7, the aquosity polymer isocyanic ester adhesive after veneer is coated allotment, glue-spread is 300g/m
2
8, described two front plate and two side panels are being glued together 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 assembly shown in Figure 6, through composing cross section, are the square or rectangular hollow square column.
9, the workshop sections such as with described hollow mitered Recombined bamboo structural wood slab, process cutting edge, saw cut, sanding, be processed into hollow mitered Recombined bamboo structural wood as shown in Figure 7 and Figure 8.
Embodiment 2: weld is the hollow mitered Recombined bamboo of miter angle structural wood
The hollow mitered Recombined bamboo structural wood of the utility model exemplary embodiments, it comprises Recombined bamboo (1), cardboard (2), veneer (3) and the adhesive (not marking in figure) of vertical mitered spreading, as shown in figure 15, 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 the vertical mitered spreading of Recombined bamboo process; 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 agent of resorcinol gluing; The weld of gummed two front plate (11) and side panel (12) is miter angle mutually.
The hollow mitered Recombined bamboo of the utility model structural wood manufacture method typical case implementation step is as follows:
1, by discongesting, drying, impregnation, drying, gummed, maintenance, cutting edge, saw cut and sanding workshop section again, timber is processed into (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 the inclined-plane of miter angle;
3, above-mentioned Recombined bamboo two ends are sawn into as shown in Figure 9 oblique section, the thickness at mitered position and chamfer length ratio are 1: 15;
4, take host and the curing agent of the agent of resorcinol gluing, mixing and stirring according to 100: 18 ratios;
5, by being processed into ramp structure as shown in Figure 2, the thickness at mitered position and chamfer length ratio are 1: 15 with cardboard;
6, the resorcinol gluing agent 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 3, 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 4;
7, by rotary-cut, drying, cutting edge workshop section, it is 6cm that timber is processed into width, and thickness is the specification veneer of 0.8mm, as shown in Figure 5;
8, the resorcinol gluing agent after veneer is coated allotment, glue-spread is 250g/m
2
9, described two front plate and two side panels are being glued together junction mutually by being the miter angle combination, two front plate of gummed and side panel arrange one deck veneer between connecting mutually,, by assembly shown in Figure 9, through composing cross section, are the square or rectangular hollow square column;
10, the workshop sections such as with described hollow mitered Recombined bamboo structural wood slab, process cutting edge, saw cut, sanding, be processed into hollow mitered Recombined bamboo structural wood as shown in Figure 10 and Figure 11.