CN100393492C - Reduction of bending wood plate - Google Patents
Reduction of bending wood plate Download PDFInfo
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- CN100393492C CN100393492C CNB2006102002740A CN200610200274A CN100393492C CN 100393492 C CN100393492 C CN 100393492C CN B2006102002740 A CNB2006102002740 A CN B2006102002740A CN 200610200274 A CN200610200274 A CN 200610200274A CN 100393492 C CN100393492 C CN 100393492C
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Abstract
The present invention a method of restoring bent wooden boards. Bent board timber is stacked in a boiling pool and is heated, temperature rises to 50 DEG C to 70 DEG C, the water temperature is maintained, the bent board timber is boiled for 72 hours to 120 hours in constant temperature water, and then, the heating operation is stopped; the water is naturally cooled to 15 DEG C to 45 DEG C, the water in the boiling pool is discharged, and the bent board timber is taken out and is stacked; the bent board timber is naturally aired until the surface does not have liquid water, and then, the timber is placed in a timber dry kiln for drying and is taken out of the kiln after cooled; the timber is cured for 6 to 10 days under room temperature. The present invention adopts a boiling heat-treatment secondary drying technology, the bent board timber generated in the drying production is restored and flattened for reutilization, and the restoring reutilization rate can reach more than 80%. The present invention has the characteristics of high utilization rate, low wood consumption, low production cost, etc.
Description
Technical field:
The present invention relates to a kind of processing treatment technology of timber, particularly a kind of restored method of prying wood plate.
Background technology:
The drying of wood is first procedure in the timber processing, but lack of standardization, reason such as drying means is improper owing to log yard, usually cause timber to finish the back and produce distortion, easement, horizontal prying distortion such as curved in drying, make timber can not carry out processing and utilization, greatly reduce the utilization rate of timber, prying is serious then loses use value fully, causes the waste of timber, according to statistics, produce the prying plate in the dry run and account for 3%～5% of desiccated wood total amount.
At present, the utilization of prying plate only is confined to three aspects: the one, be used to make being worth cheap skirting; The 2nd, through the break down reorganization, make and be worth cheap finger joint lumber; The 3rd, be used to serve as fuel.More than three kinds of reductions that utilize mode all to cause timber utilization rate.Because prying wood plate physics and mechanical property do not change, and just change are taking place in shape; Therefore, if can allow the prying plate restore again by scientific and reasonable technology and utilize after straight again, that must increase the use value of this part timber, thereby reduces the economic loss of enterprise to greatest extent.At present, about restoring the technology of utilizing again, the prying wood plate yet there are no report.
Summary of the invention:
The objective of the invention is to: a kind of restored method that adopts the prying wood plate of poach heat treatment redrying is provided, utilization is again restored in the timber alignment that the prying distortion takes place in the drying production, to overcome the deficiencies in the prior art, the prying wood plate that makes these reductions or lose use value is replied original use value, improve the utilization rate of timber, reduce the economic loss of enterprise to greatest extent, increase economic benefit of enterprises.
The present invention be achieved in that it earlier with prying wood plate piling in the poach pond, heat temperature raising to 50～70 ℃ keep water temperature constant then, the prying wood plate are carried out 72～120 hours constant temperature poach, stop heating then, make water temperature naturally cool to the water in the venting poach pond after 15～45 ℃, take out the prying wood plate, piling, and at room temperature dry naturally and do not have aqueous water to the surface, it is dry in the lumber kiln to pack into then, cooling kiln discharge, health at room temperature 6～10 days.
Its piling that the prying wood plate is crisscross and is pressed on heap top with weight in the poach pond.
After the prying wood plate at room temperature dries naturally and does not have aqueous water to the surface, earlier the prying wood plate be stacked in normal timber below, and at material heap top pressure 500～700kg/m
2Weight, dry in the lumber kiln of packing into then.
The applicant tests sweet crotons, fragrant two wing beans and three kinds of seeds of Jatoba according to method of the present invention, and its result is as follows:
The examination material is prepared:
Test seeds and title: three kinds of seeds are respectively sweet crotons, fragrant two wing beans, Jatoba.
Test specimen specification: 920mm * 92mm * 22mm; Quantity: every kind of about 3.784m of timber
3
Testing equipment: the test capital equipment is the poach pond, hot water circuit dry kiln etc.The poach pond is design voluntarily, and useful load is 4.3m
3Dry kiln is a hot water heating top blower fan fork truck feed type lumber kiln.Real dress timber 62.3m
3, totally 36 materials are piled, each small wood heap size: 1.87m * 1.7m * 0.9m.Every kiln is installed 3 blower fans, each blower fan nominal air delivery 28000m
3/ h, each blower fan is equipped with the H level heat resisting motor of a 2.2kw, every kiln installation general power 6.6kw.
Process of the test:
1.1 implementation process is handled in the smoothing of sweet crotons prying wood:
(1) poach piling: because prying wood plate distortion is big, be difficult for carrying out the stacking of prying plate with parting bead, so with seesaw timber crisscross carry out stacking, and be pressed on the heap top, to guarantee that hot water easier penetrates in the timber with weight.
(2) heat up: the water temperature rate of climb is per hour 5 ℃, is elevated to 60 ℃ up to water temperature.
(3) permanent hot warm water is handled: after water temperature rises to 60 ℃, keep water temperature constant, prying wood plate constant-temperature hot water is handled 96h
(4) cooling water outlet: after the constant-temperature hot water processing finished, after allowing water temperature naturally cool to differ 15 ℃ with room temperature, venting was handled water, and the prying wood plate is taken out from the hot water treatment pond.
(5) kiln drying piling:, prying wood is carried out piling according to conventional method for drying wood.
(6) dry naturally: prying wood carry out piling good after, at room temperature dry naturally and do not have aqueous water to the surface.
(7) it is dry to advance kiln drying: after prying wood room temperature is dried naturally, the prying yard place normal timber below, and press 600kg/m at material heap top
2Weight is used the fork truck loading of kiln then.Drying process shown in the employing table 1 carries out drying to prying wood.When moisture content reach want after, the cooling kiln discharge.
The sweet crotons drying schedule of table 1 22mm
| Stage | Moisture content (%) | Dry-bulb temperature (℃) | Wet-bulb temperature (℃) | Remarks |
| The pre-heat treatment | 60 | 60 | Handle 24h | |
| 1 | ＞40 | 42 | 40 | |
| 2 | 40～35 | 44 | 41 | |
| 3 | 35～30 | 46 | 41 | |
| Intermediate treatment | 50 | 49 | Handle 16h | |
| 4 | 30～25 | 48 | 41 | |
| 5 | 25～20 | 52 | 42 | |
| Intermediate treatment | 55 | 53 | Handle 16h | |
| 6 | 20～15 | 55 | 42 | |
| 7 | ＜15 | 60 | 44 | |
| Balance Treatment | 60 | 53 |
(8) health: the timber behind the kiln discharge, kiln discharge timber is removed behind the briquetting stacking place health at room temperature 7 days.
(9) quality analysis: see Table 2, randomly draw 100 test specimens as detected object, detect carrying out dry mass by GB/T6491-1999 at thousand dry good timber.Through the processing of this process, the smoothing return rate of prying wood plate reaches 87%, and the timber after the smoothing keeps original physics, mechanical property substantially, and its moisture content reaches timber and uses the ground standard-required, and dry visual defects reaches country-level standard.
The sweet crotons prying of table 2 plate dry mass statistical form
| Project | Average measurement value | Reach grade | Compliance rate (%) | Explanation |
| Average moisture content requires W z(％) | 11.54 | Qualified | 94 | Water content requirement 10%～14% |
| Uniform drying degree Δ W z(％) | ±2.17 | One-level | Require in ± 3.0 | |
| Meansquaredeviation (%) | ±1.12 | One-level | Require in ± 1.5 | |
| Average residual residue stress Y (%) | 0.76 | One-level | 100 | One-level requires index＜2.5 |
| Average easement degree (%) | 0.11 | One-level | 96 | One-level requires index＜1.0 |
| Average lateral bending degree (%) | 0.12 | One-level | 92 | One-level requires index＜0.5 |
| Average horizontal camber (%) | 0.16 | One-level | 99 | One-level requires index＜1.0 |
| Average twist degree (%) | 0.08 | One-level | 100 | One-level requires index＜1.0 |
1.2 fragrant two
Implementation process is handled in the smoothing of wing beans prying wood:
(1) poach piling: because prying wood plate distortion is difficult for carrying out the stacking of prying plate greatly with parting bead, so with seesaw timber crisscross carry out stacking, and be pressed on the heap top, to guarantee that hot water easier penetrates into timber with weight.
(2) heat up: the water temperature rate of climb is per hour 5 ℃, is elevated to 60 ℃ up to water temperature.
(3) permanent hot warm water is handled: after water temperature rises to 60 ℃, keep water temperature constant, prying wood plate constant-temperature hot water is handled 120h.
(4) cooling water outlet: after the constant-temperature hot water processing finished, after allowing water temperature naturally cool to differ 15 ℃ with room temperature, venting was handled water, and the prying wood plate is taken out from the hot water treatment pond.
(5) kiln drying piling:, prying wood is carried out piling according to conventional method for drying wood.
(6) dry naturally: prying wood carry out piling good after, at room temperature dry naturally and do not have aqueous water to the surface.
(7) it is dry to advance kiln drying: after prying wood room temperature is dried naturally, the prying yard place normal timber below, and press 600kg/m at material heap top
2Weight is used the fork truck loading of kiln then.Drying process shown in the employing table 3 carries out drying to prying wood.After moisture content reaches requirement, the cooling kiln discharge.
The dry master meter of the fragrant two wing dried bean curds of table 3 22mm
| Stage | Moisture content (%) | Dry-bulb temperature (℃) | Wet-bulb temperature (℃) | Remarks |
| The pre-heat treatment | 60 | 60 | Handle 24h | |
| 1 | ＞40 | 40 | 38 | |
| 2 | 40～35 | 43 | 41 | |
| 3 | 35～30 | 45 | 41 | |
| Intermediate treatment | 60 | 60 | Handle 24h | |
| 4 | 30～25 | 46 | 40 | |
| 5 | 25～20 | 50 | 40 | |
| Intermediate treatment | 65 | 64 | Handle 24h | |
| 6 | 20～15 | 55 | 42 | |
| 7 | ＜15 | 60 | 45 | |
| Balance Treatment | 60 | 53 |
(8) health: the timber behind the kiln discharge, kiln discharge timber is removed behind the briquetting stacking place health at room temperature 12 days.
(9) quality analysis: see Table 4, randomly draw 100 test specimens as detected object, detect carrying out dry mass by GB/T6491-1999 at the good timber of drying.Through the processing of this process, the smoothing return rate of prying wood plate reaches 81%, and the timber after the smoothing keeps original physics, mechanical property substantially, and its moisture content reaches timber and uses the ground standard-required, and dry visual defects reaches country-level standard.
The fragrant two wing beans prying wood plate dry mass statistical forms of table 4
| Project | Average measurement value | Reach grade | Compliance rate (%) | Explanation |
| Average moisture content requires W z(％) | 12.13 | Qualified | 92 | Water content requirement 10%～14% |
| Uniform drying degree Δ W z(％) | ±2.01 | One-level | Require in ± 3.0 | |
| Meansquaredeviation (%) | ±1.53 | One-level | Require in ± 1.5 | |
| Average residual residue stress Y (%) | 0.85 | One-level | 100 | One-level requires index＜2.5 |
| Average easement degree (%) | 0.12 | One-level | 93 | One-level requires index＜1.0 |
| Average lateral bending degree (%) | 0.17 | One-level | 94 | One-level requires index＜0.5 |
| Average horizontal camber (%) | 0.22 | One-level | 96 | One-level requires index＜1.0 |
| Average twist degree (%) | 0.14 | One-level | 94 | One-level requires index＜1.0 |
1.3 implementation process is handled in the smoothing of Jatoba prying wood:
(1) poach piling: because prying wood plate distortion is big, be difficult for carrying out the stacking of prying plate with parting bead, so with seesaw timber crisscross carry out stacking, and be pressed on the heap top, to guarantee that hot water easier penetrates into timber with weight.
(2) heat up: the water temperature rate of climb is per hour 5 ℃, is elevated to 60 ℃ up to water temperature.
(3) permanent hot warm water is handled: after water temperature rises to 60 ℃, keep water temperature constant, prying wood plate constant-temperature hot water is handled 120h.
(4) cooling water outlet: after the constant-temperature hot water processing finished, after allowing water temperature naturally cool to differ 15 ℃ with room temperature, venting was handled water, and the prying wood plate is taken out from the hot water treatment pond.
(5) kiln thousand pilings:, prying wood is carried out piling according to conventional timber thousand drying methods.
(6) dry naturally: prying wood carry out piling good after, at room temperature dry naturally and do not have aqueous water to the surface.
(7) it is dry to advance kiln drying: after prying wood room temperature is dried naturally, the prying yard place normal timber below, and press 600kg/m at material heap top
2Weight is used the fork truck loading of kiln then.Drying process shown in the employing table 5 carries out drying to prying wood.When moisture content reach want after, the cooling kiln discharge.
Table 5 22mm Jatoba drying schedule
| Stage | Moisture content (%) | Dry-bulb temperature (℃) | Wet-bulb temperature (℃) | Remarks |
| The pre-heat treatment | 60 | 60 | Handle 24h | |
| 1 | ＞40 | 41 | 39 | |
| 2 | 40～35 | 43 | 41 | |
| 3 | 35～30 | 45 | 41 | |
| Intermediate treatment | 60 | 60 | Handle 24h | |
| 4 | 30～25 | 46 | 40 | |
| Intermediate treatment | 65 | 64 | Handle 24h | |
| 5 | 25～20 | 50 | 40 | |
| Intermediate treatment | 65 | 64 | Handle 24h | |
| 6 | 20～15 | 55 | 42 | |
| 7 | ＜15 | 60 | 45 | |
| Balance Treatment | 60 | 53 |
(8) health: the timber behind the kiln discharge, kiln discharge timber is removed behind the briquetting stacking place health at room temperature 15 days.
(9) quality analysis: see Table 6, randomly draw 100 test specimens as detected object, detect carrying out dry mass by GB/T6491-1999 at the good timber of drying.Through the processing of this process, the smoothing return rate of prying wood plate reaches 84%, and the timber after the smoothing keeps original physics, mechanical property substantially, and its moisture content reaches timber and uses the ground standard-required, and dry visual defects reaches country-level standard.
Table 6 Jatoba prying wood plate dry mass statistical form
| Project | Average measurement value | Reach grade | Compliance rate (%) | Explanation |
| Average moisture content requires W z(％) | 11.89 | Qualified | 95 | Water content requirement 10%～14% |
| Uniform drying degree Δ W z(％) | ±2.34 | One-level | Require in ± 3.0 | |
| Meansquaredeviation (%) | ±1.55 | One-level | Require in ± 1.5 | |
| Average residual residue stress Y (%) | 0.69 | One-level | 100 | One-level requires index＜2.5 |
| Average easement degree (%) | 0.17 | One-level | 91 | One-level requires index＜1.0 |
| Average lateral bending degree (%) | 0.23 | One-level | 95 | One-level requires index＜0.5 |
| Average horizontal camber (%) | 0.19 | One-level | 95 | One-level requires to refer to border＜1.0 |
| Average twist degree (%) | 0.11 | One-level | 97 | One-level requires index＜1.0 |
By above-mentioned result of the test as can be known, the present invention adopts poach heat treatment redrying technology, the prying wood plate that produces during drying produced restores and straightly utilizes again, and it is replied utilization rate again and can reach more than 80%, has utilization rate height, the timber loss is little, production cost the is low characteristics of replying, use restored method of the present invention, the prying wood plate " is turned waste into wealth ", reduce the timber waste, improve economic benefit of enterprises, reduce the economic loss of enterprise, have very high practical value.
The specific embodiment:
Embodiments of the invention: with crisscross being stacked in the poach pond of prying wood plate, and be pressed on heap top with weight, heat temperature raising to 50～70 ℃ then, keep water temperature constant, the prying wood plate carried out 72～120 hours constant temperature poach, stop heating then, make water temperature naturally cool to the water in the venting poach pond after 15～45 ℃, take out the prying wood plate, according to conventional method for drying wood, prying wood is carried out piling, and at room temperature dry naturally and do not have aqueous water to the surface, then the prying yard is placed normal timber below, and press 600kg/m at material heap top
2Weight, dry in the lumber kiln of packing into then, dry kiln is selected hot water heating top blower fan fork truck feed type lumber kiln for use, after moisture content reaches requirement, the cooling kiln discharge, and the timber behind the kiln discharge is removed behind the briquetting stacking place, health at room temperature got final product in 6～10 days.
Claims (1)
1. the restored method of a prying wood plate, it is characterized in that: its earlier that the prying wood plate is crisscross piling is in the poach pond, and be pressed on heap top with weight, heat temperature raising to 50～70 ℃ then, keep water temperature constant, the prying wood plate carried out 72～120 hours constant temperature poach, stop heating then, make water temperature naturally cool to the water in the venting poach pond after 15～45 ℃, take out the prying wood plate, piling, and at room temperature dry naturally to the surface and do not have aqueous water, earlier the prying wood plate be stacked in normal timber below, and at material heap top pressure 500～700kg/m
2Weight, dry in the lumber kiln of packing into then, cooling kiln discharge, health at room temperature 6～10 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006102002740A CN100393492C (en) | 2006-03-27 | 2006-03-27 | Reduction of bending wood plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006102002740A CN100393492C (en) | 2006-03-27 | 2006-03-27 | Reduction of bending wood plate |
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|---|---|
| CN1817590A CN1817590A (en) | 2006-08-16 |
| CN100393492C true CN100393492C (en) | 2008-06-11 |
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| CNB2006102002740A Active CN100393492C (en) | 2006-03-27 | 2006-03-27 | Reduction of bending wood plate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596728B (en) * | 2009-06-06 | 2011-06-08 | 浙江世友木业有限公司 | Restoring method of bent and raised veneer |
| CN101733798B (en) * | 2009-12-18 | 2012-07-18 | 中宏常晴家具(大连)有限公司 | Wine bucket material flattening process |
| CN106881756B (en) * | 2017-01-16 | 2018-12-21 | 华南农业大学 | A kind of correction of warpage timber and hot-pressing drying method |
| CN112497397B (en) * | 2020-11-03 | 2022-09-20 | 安徽润仲科技有限公司 | Bamboo straightening equipment for manufacturing bamboo flute |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60217102A (en) * | 1984-04-13 | 1985-10-30 | タイ開発株式会社 | Manufacture of bent wood of gum tree |
| JPH01160601A (en) * | 1987-12-17 | 1989-06-23 | Ashida Mfg Co Ltd | Method of impregnating half-split chopstick material with hot water |
| US5247975A (en) * | 1989-12-25 | 1993-09-28 | Hisaka Works Limited | Wood treating method and apparatus |
| JPH06297412A (en) * | 1993-04-09 | 1994-10-25 | Hayashi Prod Corp | Treatment method for stabilizing quality of wood |
-
2006
- 2006-03-27 CN CNB2006102002740A patent/CN100393492C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60217102A (en) * | 1984-04-13 | 1985-10-30 | タイ開発株式会社 | Manufacture of bent wood of gum tree |
| JPH01160601A (en) * | 1987-12-17 | 1989-06-23 | Ashida Mfg Co Ltd | Method of impregnating half-split chopstick material with hot water |
| US5247975A (en) * | 1989-12-25 | 1993-09-28 | Hisaka Works Limited | Wood treating method and apparatus |
| JPH06297412A (en) * | 1993-04-09 | 1994-10-25 | Hayashi Prod Corp | Treatment method for stabilizing quality of wood |
Non-Patent Citations (2)
| Title |
|---|
| 木材变定的产生、回复及其永久固定. 王洁瑛，赵广杰.北京林业大学学报，第21卷第3期. 1999 |
| 木材变定的产生、回复及其永久固定. 王洁瑛，赵广杰.北京林业大学学报，第21卷第3期. 1999 * |
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Denomination of invention: Restoration method of curved rocker wood Effective date of registration: 20211227 Granted publication date: 20080611 Pledgee: Agricultural Bank of China Limited Huzhou Nanxun sub branch Pledgor: ZHEJIANG SHIYOU WOOD INDUSTRY Co.,Ltd. Registration number: Y2021330002682 |
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Date of cancellation: 20220506 Granted publication date: 20080611 Pledgee: Agricultural Bank of China Limited Huzhou Nanxun sub branch Pledgor: ZHEJIANG SHIYOU WOOD INDUSTRY Co.,Ltd. Registration number: Y2021330002682 |