CN202727032U - High, strengthening and thick laminated veneer lumber - Google Patents
High, strengthening and thick laminated veneer lumber Download PDFInfo
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- CN202727032U CN202727032U CN 201220451670 CN201220451670U CN202727032U CN 202727032 U CN202727032 U CN 202727032U CN 201220451670 CN201220451670 CN 201220451670 CN 201220451670 U CN201220451670 U CN 201220451670U CN 202727032 U CN202727032 U CN 202727032U
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Abstract
The utility model provides high, strengthening and thick laminated veneer lumber which is simple in structure, low in cost and good in mechanical property. A plurality of veneers are subjected to gluing, assembly and pressure gluing to form the laminated veneer lumber, and carbon fiber cloth is arranged between the first veneer layer and the second veneer layer, between the last veneer layer and the penultimate veneer layer and between two veneer layers in the middle.
Description
Technical field
Present technique relates to laminated veneer lumber, specifically, is a kind of with the high-strength thick type laminated veneer lumber of carbon fiber reinforced, belongs to the structure wood-based plate and makes the field.
Background technology
Laminated veneer lumber is a kind of small diameter grade log that utilizes, the high-performance novel structural material that after rotary-cut veneer multilayer gluing, rift grain (also can add face crossing) assembly, splicing glue laminated is formed.It has not only kept the many good inherent advantages of timber, also has uniform architectural characteristic, and Strength Variance is little, and allowable stress is high, considerably beyond material-saving is arranged, approach without material-saving good stability of the dimension, the ratio of strength to weight is better than steel, and is easy to process, and has good stability and antidetonation shock attenuation.Over past ten years, general a large amount of laminated veneer lumbers that use such as European and American developed countries, Japan and Korea S are as the electronic product packaging material.And China causes a large amount of solid woods to be used for dynamo-electric packing owing to backward in technique aspect the thick type laminated veneer lumber of manufacturing, causes the significant wastage of the forest reserves.
When the preparation laminated veneer lumber, conventional method is that timber is peeled into veneer, to veneer drying (reaching to certain moisture content), gluing on veneer, assembly; Cold-press adhesion again.In the method, need to be to veneer drying, and chronic (about 24 hours) of Cold-press adhesion, preparation efficiency is very low.
Summary of the invention
The purpose of present technique provide a kind of simple in structure, cost is lower, the high-strength thick type laminated veneer lumber of mechanical property excellence simultaneously.
The high-strength thick type laminated veneer lumber of present technique forms with multilayer single plate gluing, assembly, the gummed of exerting pressure, between first and second layer veneer, be provided with carbon cloth between the two-layer veneer between last, two layers of veneer, in the centre.
Above-mentioned high-strength thick type laminated veneer lumber, described veneer is meaning poplar veneer, described veneer thickness is greater than 2mm.
Above-mentioned high-strength thick type laminated veneer lumber, the single plate double side glue-spread is 250-300g/m
2
Present technique provides the preparation method of above-mentioned high-strength thick type laminated veneer lumber simultaneously, and the method does not require (need not veneer drying) to the moisture content of veneer, and preparation efficiency is high.
The preparation method of the high-strength thick type laminated veneer lumber of present technique is that timber is peeled into veneer, gluing on veneer, assembly; Hot pressing 15-30min gets final product on the microwave press, temperature 130-150 ℃, pressure 1.0-1.2MPa during hot pressing; During assembly, between first and second layer veneer, between the two-layer veneer between last, two layers of veneer, in the centre, be provided with carbon cloth; During gluing, select phenolic resins between the veneer, veneer and carbon cloth are selected epoxy resin between adopting.
Above-mentioned preparation method, described timber is selected the meaning poplar, and kindness poplar veneer thickness is greater than 2mm.
Above-mentioned preparation method, single plate double side glue-spread are 250-300g/m
2
The beneficial effect of present technique: 1, present technique is only between first and second layer veneer, be provided with carbon cloth between the two-layer veneer between last, two layers of veneer, in the centre, rather than between each layer veneer carbon cloth is set all.Present technique has been saved the usage quantity of carbon cloth, but through test, the laminated veneer lumber that carbon cloth all is set between its mechanical property and each layer veneer is compared, and does not have large difference.2, the moisture content of veneer do not required, need not drying during preparation, save operation.3, adopt the hot-press gluing of microwave press, efficient is high.Microwave is a kind of electromagnetic wave, can heat simultaneously material inside and outside section, can selectively heat the material different component in addition, so that heat transfer efficiency improves greatly, manufacturing only needs 15-30min more than or equal to the thick type laminated veneer lumber of 20cm, compare than the gluing time more than the cold-press method 24h, efficient significantly improves.
Description of drawings
Fig. 1 is the schematic diagram of this high-strength thick type laminated veneer lumber.
The specific embodiment
Embodiment 1: the preparation of high-strength thick type laminated veneer lumber
1, the preparation of meaning poplar veneer.Process is: meaning Yang Yuanmu-block-juggle softens-peeling-rotary-cut-shearing-repairing-bevel grinding.Meaning poplar veneer thickness 3mm, moisture content does not need special control.
2, the poplar veneer gluing of will anticipating is selected phenolic resins between the adjacent veneer, and veneer and carbon cloth are selected epoxy resin between adopting.The single plate double side glue-spread is 250-300g/m
2
3, with 20 layers of meaning poplar veneer rift grain assembly, referring to Fig. 1, with three layers of carbon cloth 7 place respectively between ground floor veneer 1 and the second layer veneer 2, between the 10th layer of veneer 3 and the 11th layer veneer 4, between the 19th layer of veneer 5 and the 20th layer of veneer 6.
4, be hot pressing on the microwave press under the 3.5-10KW condition at temperature 130-150 ℃, pressure 1.0-1.2MPa, microwave output power, hot pressing speed is 0.4mm/min approximately.
5, with the cooling of the product after the hot pressing, sawing becomes cuboid wooden frame (wooden frame is identical with thickness after the cooling perpendicular to the thickness on the veneer direction).
Comparative Examples 1:
The different of the preparation of Comparative Examples 1 and described embodiment 1 are: carbon cloth all is set between adjacent veneer, and adhesive all is epoxy resin (without phenolic resins).Other is identical with embodiment 1.
Comparative Examples 2:
The different of the preparation of Comparative Examples 2 and described embodiment 1 are: only have one deck carbon cloth, this layer carbon fiber arranged between the 10th layer of veneer and the 11th layer veneer.Other is identical with embodiment 1.
Comparative Examples 3:
The different of the preparation of Comparative Examples 3 and described embodiment 1 are: only have two-layer carbon cloth, this two-layer carbon cloth places respectively between ground floor veneer and the second layer veneer, between the 19th layer of veneer and the 20th layer of veneer.Other is identical with embodiment 1.
The wooden frame of embodiment 1, each Comparative Examples sawing gained (width of each wooden frame relatively, equal in length) is done Mechanics Performance Testing, the results are shown in Table 1.
Table 1
| ? | Embodiment 1 | Comparative Examples 1 | Comparative Examples 2 | Comparative Examples 3 |
| MOR MPa | 85 | 90 | 65 | 80 |
| Elastic modulus G Pa | 10.1 | 12.35 | 7.0 | 8.5 |
Present technique takes full advantage of the advantage of carbon fibre material, meaning poplar material, heating using microwave, can obtain following three benefits: the one, the reasonable Arrangement carbon fibre material, greatly improve the mechanical property of meaning poplar material and saved cost, can improve 30-40% bearing capacity; Reasonable with the plate construction that the method is produced, superior performance.The 2nd, improved meaning poplar production added value and scientific and technological content, greatly expand the application of meaning poplar; The 2nd, heating using microwave, efficient is high.
Make high-strength thick type laminated veneer lumber take the meaning poplar as base material, to take full advantage of the wide fast-growing meaning Yang Ziyuan of planting range, not only bring into play the advantage of the antidetonation of timber own, overcome the defective in meaning Yang Benshen material and the processing, and strengthen so that its physical and mechanical property significantly improves by carbon fiber, simultaneously, volume recovery is higher, remarkable in economical benefits; Compare solid wood, high-strength thick type laminated veneer lumber has designability, can carry out structural design according to actual operating position; In addition, the application of microwave technology is enhanced productivity and quality so that the manufacturing cycle of thick type laminated veneer lumber shortens greatly.
Claims (4)
1. high-strength thick type laminated veneer lumber forms with multilayer single plate gluing, assembly, the gummed of exerting pressure, and it is characterized in that: between first and second layer veneer, be provided with carbon cloth between the two-layer veneer between last, two layers of veneer, in the centre.
2. high-strength thick type laminated veneer lumber as claimed in claim 1 is characterized in that: described veneer is meaning poplar veneer.
3. high-strength thick type laminated veneer lumber as claimed in claim 2, it is characterized in that: described veneer thickness is greater than 2mm.
4. high-strength thick type laminated veneer lumber as claimed in claim 1, it is characterized in that: the single plate double side glue-spread is 250-300g/m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451670 CN202727032U (en) | 2012-09-06 | 2012-09-06 | High, strengthening and thick laminated veneer lumber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451670 CN202727032U (en) | 2012-09-06 | 2012-09-06 | High, strengthening and thick laminated veneer lumber |
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| CN202727032U true CN202727032U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220451670 Expired - Fee Related CN202727032U (en) | 2012-09-06 | 2012-09-06 | High, strengthening and thick laminated veneer lumber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814842A (en) * | 2012-09-06 | 2012-12-12 | 南京林业大学 | High-strength thick laminated veneer lumber and manufacturing method thereof |
| CN104708686A (en) * | 2015-03-27 | 2015-06-17 | 广西南宁侨盛木业有限责任公司 | Integrated solid wood panel of embedded structure |
| CN114939909A (en) * | 2022-03-30 | 2022-08-26 | 福建农林大学 | Preparation process of carbon fiber reinforced wood-bamboo composite laminated timber |
-
2012
- 2012-09-06 CN CN 201220451670 patent/CN202727032U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814842A (en) * | 2012-09-06 | 2012-12-12 | 南京林业大学 | High-strength thick laminated veneer lumber and manufacturing method thereof |
| CN104708686A (en) * | 2015-03-27 | 2015-06-17 | 广西南宁侨盛木业有限责任公司 | Integrated solid wood panel of embedded structure |
| CN114939909A (en) * | 2022-03-30 | 2022-08-26 | 福建农林大学 | Preparation process of carbon fiber reinforced wood-bamboo composite laminated timber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20130906 |