CN104493938A - Drying process of rosewood - Google Patents
Drying process of rosewood Download PDFInfo
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- CN104493938A CN104493938A CN201510011101.3A CN201510011101A CN104493938A CN 104493938 A CN104493938 A CN 104493938A CN 201510011101 A CN201510011101 A CN 201510011101A CN 104493938 A CN104493938 A CN 104493938A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic impregnating agents
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention provides a drying process of rosewood, and belonging to the field of furniture making. The drying process comprises the following steps: anti-oxidization treatment, preheating, first-stage temperature and humidity reduction, second-stage temperature and humidity reduction, first-stage temperature increase and humidity reduction, second-stage temperature increase and humidity reduction, and surface protection. The rosewood is subjected to anti-oxidization treatment before being preheated, so that the discoloring phenomenon of the rosewood is greatly reduced to ensure that the color of the rosewood is good, and processed furniture is attractive in appearance and color and excellent in anti-oxidization capability. The drying process has the advantage that the rosewood can be protected from being discolored.
Description
Technical field
The invention belongs to furniture manufacturing field, relate to a kind of drying process of redwood.
Background technology
Redwood, the general designation of high-end, the famous and precious furniture woods of China, the hardwood of refer initially to redness, kind is more; After last century the eighties, everybody is to the increase in demand of mahogany furniture, and industry is urgently to be speculated, and country has carried out specification according to indexs such as density to redwood, redwood specification is: two sections, five genus, eight classes, 33 kinds.Redwood because poor growth, material are hard, growth period is all more than the centuries, originate in a lot of redwood of south China, Zao Ming, clear period just by remaining little of cutting down, redwood of today, be originate in Southeast Asia, Africa mostly, China Guangdong, Yunnan have cultivates cultivation and introducing and planting.The difference of timber heart sapwood is obvious, and sapwood is narrow, canescence; The yellowish redness of heartwood, to redness of the skin or complexion, becomes aubergine when being exposed in air for a long time, and certain Huanghua Pear, Burma spend the color of the timber such as pears, Door frame to take on a red color.Wood figure is attractive in appearance, and material is hard, durable, for valuable furniture and workmanship etc. use material.Redwood is that torrid areas pulse family wingceltis belongs to timber, and mainly originate in India, China Guangdong, Yunnan and the South Sea Islands are also produced, and is common famous and precious hardwood." redwood " is Jiangsu and Zhejiang Provinces and northern popular title, and Guangdong one band is commonly called as " sour branch wood ".
And to the general flow of mahogany furniture processing be at present: to select materials, drying and processing, mortise, engraving, assembling, scraped finish, japanning.Wherein, drying and processing is the drying steps of redwood, the drying means had now adopts the method for steam convection current usually, change wet-bulb temperature and dry-bulb temperature realize drying, but in the composition of timber, there is multiple aldehydes matter, the method of steam convection current accelerates air flowing, and aldehydes matter is very easily oxidized under the condition of oxygen abundance, after oxidation, generate water-fast condensation product, color is redness, bronzing, brown, and timber metachromatism can occur after drying all to some extent, and what have is more serious.The color burn of timber or dimmed is often made with during the timber that high temperature drying moisture content is high; Sometimes also can because humidity during spray steaming process is excessive or hothouse does not clean for a long time and makes wood surface blackening.Dried redwood is caused to become aberration,
Summary of the invention
The object of the invention is for the above-mentioned problems in the prior art; provide a kind of drying process of redwood; the drying process of this redwood can protect redwood nondiscolouring, and oxidation resistance is strong, and the drying process solving existing redwood causes redwood to occur the problem of serious discoloration.
Object of the present invention realizes by following technical proposal: a kind of drying process of redwood, comprises the steps:
Concentration is the n-propyl gallate aqueous solution of 0.25%-0.30% and concentration by a, anti-oxidant treatment is the Tea Polyphenols aqueous solution of 60%-70%, and mixing temperature is 40-50 degree, is immersed in by redwood in mixing material, and the time is 2-3 hour;
Draw through great many of experiments, certain density n-propyl gallate and Tea Polyphenols can make redwood metachromatism not occur in the process of drying, by soaking, both mixed solutions infiltrate into the epidermis of redwood gradually, the aldehydes matter of suppression redwood epidermis cannot be oxidized in follow-up drying steps, the metachromatism decreasing redwood of high degree, makes the of good quality of redwood, and the furniture appearance color processed is attractive in appearance.
B, preheating, make temperature be 70-75 degree and humidity to be the humid air cycle of 0.08kg/m3-0.13 kg/m3 to flow through above-mentioned redwood, the time is 70-80min;
By humid air through redwood, some is arrived the surface of wet redwood by the steam in air through boundary layer, and condenses into water from the teeth outwards, the latent heat of vaporization now contained by steam becomes sensible heat, pass to redwood surface, and import inside into by surface, redwood temperature raises gradually.When hot wood surface temperature equals medium temperature, the steam partial pressure on redwood surface equals the partial pressure of circulation humid air, and the steam quantity transmitted mutually is in poised state.
C, first stage reducing temperature and humidity, make temperature be 30-40 degree and humidity to be the humid air cycle of 0.03kg/m3-0.05kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
D, second stage reducing temperature and humidity, make temperature be 20-30 degree and humidity to be the humid air cycle of 0.01kg/m3-0.03kg/m3 to flow through above-mentioned redwood, the time is 30-40min;
The effect of first stage reducing temperature and humidity and second stage reducing temperature and humidity is that moisture is evaporated from epidermis by redwood top layer under the effect of water vapour pressure difference.
E, first stage intensification wet down, make temperature be 35-45 degree and humidity to be the humid air cycle of 0.008kg/m3-0.01kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
F, second stage intensification wet down, make temperature be 55-65 degree and humidity to be the humid air cycle of 0.004kg/m3-0.009kg/m3 to flow through above-mentioned redwood, until water content is 7-11% in redwood;
By the outer low moisture gradient of the height between the top layer of redwood and inner. layers and interior low outer high thermograde.Under the effect of these two kinds of gradients, the moisture in inner. layers is moved to surface, thus evaporation, until water content is 7-11% in redwood.
G, surface protection, be that the Tea Polyphenols aqueous solution of 60%-70% adopts the mode of spraying to process redwood surface by concentration, carry out drying by high-pressure hot wind to redwood surface.
After the drying, major part n-propyl gallate and Tea Polyphenols are along with water vapour runs off, the Tea Polyphenols aqueous solution is sprayed fast at the epidermis of redwood by the mode of spraying, then in the moisture evaporation being accelerated redwood epidermis by high-pressure hot wind, Tea Polyphenols is enable to be retained in redwood epidermis, enable the furniture of machine-shaping not oxidized, metachromatism can not occur, and the service life of mahogany furniture can be improved.
In the drying process of above-mentioned a kind of redwood, described step a carries out in fermentation vat.
Fermentation vat is purchased to Wuhan Chuan Lian Machinery Co., Ltd., and model is 349-cl.
In the drying process of above-mentioned a kind of redwood, described step b to step f all carries out in dry kiln.
The safe and sound Machinery Co., Ltd. to Zhucheng purchased by dry kiln, and model is 1280c.
In the drying process of above-mentioned a kind of redwood, the volume ratio of the described n-propyl gallate aqueous solution and the described Tea Polyphenols aqueous solution is 2:5.
Tea Polyphenols is compared with n-propyl gallate soluble in water, makes into product difficulty and reduces, and in reality becomes to produce, arranges different volume ratios according to the difference of wood material.
Compared with prior art, the drying process of this redwood has the following advantages:
1, the drying process of this redwood carries out anti-oxidant treatment to redwood before preheating, and the metachromatism decreasing redwood of high degree, makes the of good quality of redwood, and the furniture appearance color processed is attractive in appearance.
By carrying out drying stage by stage after the drying process preheating of 2, this redwood, effective, thoroughly dry.
3, the drying process of this redwood is after drying, by the mode of injection and high-pressure hot wind, Tea Polyphenols can be retained in redwood epidermis, enable the furniture of machine-shaping not oxidized, metachromatism can not occur, and the service life of mahogany furniture can be improved.
The anti-oxidant Anti-tarnishing of redwood is realized by n-propyl gallate and Tea Polyphenols acting in conjunction, Be very effective in the drying process of 4, this redwood.
Detailed description of the invention
Embodiment one
A drying process for redwood, comprises the steps:
Concentration is the n-propyl gallate aqueous solution of 0.25%-0.30% and concentration by a, anti-oxidant treatment is the Tea Polyphenols aqueous solution of 60%-70%, and mixing temperature is 40-50 degree, is immersed in by redwood in mixing material, and the time is 2-3 hour;
Draw through great many of experiments, certain density n-propyl gallate and Tea Polyphenols can make redwood metachromatism not occur in the process of drying, by soaking, both mixed solutions infiltrate into the epidermis of redwood gradually, the aldehydes matter of suppression redwood epidermis cannot be oxidized in follow-up drying steps, the metachromatism decreasing redwood of high degree, makes the of good quality of redwood, and the furniture appearance color processed is attractive in appearance.
B, preheating, make temperature be 70-75 degree and humidity to be the humid air cycle of 0.08kg/m3-0.13 kg/m3 to flow through above-mentioned redwood, the time is 70-80min;
By humid air through redwood, some is arrived the surface of wet redwood by the steam in air through boundary layer, and condenses into water from the teeth outwards, the latent heat of vaporization now contained by steam becomes sensible heat, pass to redwood surface, and import inside into by surface, redwood temperature raises gradually.When hot wood surface temperature equals medium temperature, the steam partial pressure on redwood surface equals the partial pressure of circulation humid air, and the steam quantity transmitted mutually is in poised state.
C, first stage reducing temperature and humidity, make temperature be 30-40 degree and humidity to be the humid air cycle of 0.03kg/m3-0.05kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
D, second stage reducing temperature and humidity, make temperature be 20-30 degree and humidity to be the humid air cycle of 0.01kg/m3-0.03kg/m3 to flow through above-mentioned redwood, the time is 30-40min;
The effect of first stage reducing temperature and humidity and second stage reducing temperature and humidity is that moisture is evaporated from epidermis by redwood top layer under the effect of water vapour pressure difference.
E, first stage intensification wet down, make temperature be 35-45 degree and humidity to be the humid air cycle of 0.008kg/m3-0.01kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
F, second stage intensification wet down, make temperature be 55-65 degree and humidity to be the humid air cycle of 0.004kg/m3-0.009kg/m3 to flow through above-mentioned redwood, until water content is 7-11% in redwood;
By the outer low moisture gradient of the height between the top layer of redwood and inner. layers and interior low outer high thermograde.Under the effect of these two kinds of gradients, the moisture in inner. layers is moved to surface, thus evaporation, until water content is 7-11% in redwood.
G, surface protection, be that the Tea Polyphenols aqueous solution of 60%-70% adopts the mode of spraying to process redwood surface by concentration, carry out drying by high-pressure hot wind to redwood surface;
After the drying, major part n-propyl gallate and Tea Polyphenols are along with water vapour runs off, the Tea Polyphenols aqueous solution is sprayed fast at the epidermis of redwood by the mode of spraying, then in the moisture evaporation being accelerated redwood epidermis by high-pressure hot wind, Tea Polyphenols is enable to be retained in redwood epidermis, enable the furniture of machine-shaping not oxidized, metachromatism can not occur, and the service life of mahogany furniture can be improved.
Step a carries out in fermentation vat.Fermentation vat is purchased to Wuhan Chuan Lian Machinery Co., Ltd., and model is 349-cl.
Described step b to step f all carries out in dry kiln.The safe and sound Machinery Co., Ltd. to Zhucheng purchased by dry kiln, and model is 1280c.
The volume ratio of the n-propyl gallate aqueous solution and the described Tea Polyphenols aqueous solution is 2:5.Tea Polyphenols is compared with n-propyl gallate soluble in water, makes into product difficulty and reduces, and in reality becomes to produce, arranges different volume ratios according to the difference of wood material.
Below for the white acid branch quality in redwood is example:
A, by concentration be 0.28% the n-propyl gallate aqueous solution and concentration be 65% Tea Polyphenols aqueous solution, mixing temperature is 45 degree, is immersed in mixing material by white acid branch sample, and the time is 2.5 hours;
B, make temperature be 70 degree and humidity is that the humid air cycle of 0.1kg/m3 flows through above-mentioned white acid branch, the time is 75min;
C, make temperature be 35 degree and humidity is that the humid air cycle of 0.04kg/m3 flows through above-mentioned white acid branch, the time is 55min;
D, make temperature be 25 degree and humidity is that the humid air cycle of 0.02kg/m3 flows through above-mentioned white acid branch, the time is 30-40min;
E, make temperature be 40 degree and humidity is that the humid air cycle of 0.01kg/m3 flows through above-mentioned white acid branch, the time is 50-60min;
F, temperature is made to be 60 degree and humidity is that the humid air cycle of 0.008kg/m3 flows through above-mentioned white acid branch, until water content is 9% in redwood;
G, by concentration be 65% the Tea Polyphenols aqueous solution adopt the mode of spraying to process white acid branch surface, by high-pressure hot wind, drying is carried out to white acid branch surface.Hot blast temperature is 60 degree, and the time is 4 minutes.
Through above step, metachromatism is not there is in white acid branch in the process of drying, and the former stable chemical nature of the furniture made of the furniture ratio common process made by white acid branch to cross by this PROCESS FOR TREATMENT, it is 45 degree in temperature, time is in the enclosure space of 5 hours, not there is metachromatism in the former, trickle tan precipitate then appears in the latter surface.
Embodiment two
For the rosewood kind in redwood in the present embodiment:
A, by concentration be 0.3% the n-propyl gallate aqueous solution and concentration be 60% Tea Polyphenols aqueous solution, mixing temperature is 40 degree, is immersed in by redwood in mixing material, and the time is 2.5 hours;
B, make temperature be 70 degree and humidity is that the humid air cycle of 0.08kg/m3 flows through above-mentioned redwood, the time is 80min;
C, make temperature be 30 degree and humidity is that the humid air cycle of 0.05kg/m3 flows through above-mentioned redwood, the time is 60min;
D, make temperature be 20 degree and humidity is that the humid air cycle of 0.03kg/m3 flows through above-mentioned redwood, the time is 40min;
E, make temperature be 45 degree and humidity is that the humid air cycle of 0.01kg/m3 flows through above-mentioned redwood, the time is 60min;
F, temperature is made to be 55 degree and humidity is that the humid air cycle of 0.004kg/m3 flows through above-mentioned redwood, until water content is 10% in redwood;
G, by concentration be 70% the Tea Polyphenols aqueous solution adopt the mode of spraying to process redwood surface, carry out drying by high-pressure hot wind to redwood surface, temperature is 60 degree, and the time is 4 minutes.
Through above step, metachromatism is not there is in rosewood in the process of drying, and the former stable chemical nature of the furniture made of the furniture ratio common process made by rosewood to cross by this PROCESS FOR TREATMENT, it is 50 degree in temperature, time is in the enclosure space of 5 hours, only there is slight metachromatism in the former, the latter surface then has the pitchy sediment of large area distribution.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (4)
1. a drying process for redwood, comprises the steps:
Concentration is the n-propyl gallate aqueous solution of 0.25%-0.30% and concentration by a, anti-oxidant treatment is the Tea Polyphenols aqueous solution of 60%-70%, and mixing temperature is 40-50 degree, is immersed in by redwood in mixing material, and the time is 2-3 hour;
B, preheating, make temperature be 70-75 degree and humidity to be the humid air cycle of 0.08kg/m3-0.13 kg/m3 to flow through above-mentioned redwood, the time is 70-80min;
C, first stage reducing temperature and humidity, make temperature be 30-40 degree and humidity to be the humid air cycle of 0.03kg/m3-0.05kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
D, second stage reducing temperature and humidity, make temperature be 20-30 degree and humidity to be the humid air cycle of 0.01kg/m3-0.03kg/m3 to flow through above-mentioned redwood, the time is 30-40min;
E, first stage intensification wet down, make temperature be 35-45 degree and humidity to be the humid air cycle of 0.008kg/m3-0.01kg/m3 to flow through above-mentioned redwood, the time is 50-60min;
F, second stage intensification wet down, make temperature be 55-65 degree and humidity to be the humid air cycle of 0.004kg/m3-0.009kg/m3 to flow through above-mentioned redwood, until water content is 7-11% in redwood;
G, surface protection, be that the Tea Polyphenols aqueous solution of 60%-70% adopts the mode of spraying to process redwood surface by concentration, carry out drying by high-pressure hot wind to redwood surface.
2. the drying process of a kind of redwood according to claim 1, is characterized in that, described step a carries out in fermentation vat.
3. the drying process of a kind of redwood according to claim 1 and 2, is characterized in that, described step b to step f all carries out in dry kiln.
4. the drying process of a kind of redwood according to claim 3, is characterized in that, the volume ratio of the described n-propyl gallate aqueous solution and the described Tea Polyphenols aqueous solution is 2:5.
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| CN201510011101.3A CN104493938A (en) | 2015-01-10 | 2015-01-10 | Drying process of rosewood |
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| CN201510011101.3A CN104493938A (en) | 2015-01-10 | 2015-01-10 | Drying process of rosewood |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571364A (en) * | 2017-09-15 | 2018-01-12 | 广西融水县兴宇木业有限公司 | The preparation method of Wooden clothes hanger |
| CN107638487A (en) * | 2017-10-13 | 2018-01-30 | 商洛学院 | The dialectical treatment method of facial paralysis |
| CN107914327A (en) * | 2017-11-02 | 2018-04-17 | 成都金川田农机制造有限公司 | A kind of drying process of poplar |
| CN110926127A (en) * | 2019-12-12 | 2020-03-27 | 福州立雅家具有限公司 | Drying process of rosewood |
| CN111002412A (en) * | 2019-12-11 | 2020-04-14 | 福州立雅家具有限公司 | Antiseptic treatment method for furniture wood |
| CN111283840A (en) * | 2020-02-14 | 2020-06-16 | 南京林业大学 | Method for reducing chromatic aberration in wood board drying process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571364A (en) * | 2017-09-15 | 2018-01-12 | 广西融水县兴宇木业有限公司 | The preparation method of Wooden clothes hanger |
| CN107638487A (en) * | 2017-10-13 | 2018-01-30 | 商洛学院 | The dialectical treatment method of facial paralysis |
| CN107914327A (en) * | 2017-11-02 | 2018-04-17 | 成都金川田农机制造有限公司 | A kind of drying process of poplar |
| CN111002412A (en) * | 2019-12-11 | 2020-04-14 | 福州立雅家具有限公司 | Antiseptic treatment method for furniture wood |
| CN110926127A (en) * | 2019-12-12 | 2020-03-27 | 福州立雅家具有限公司 | Drying process of rosewood |
| CN111283840A (en) * | 2020-02-14 | 2020-06-16 | 南京林业大学 | Method for reducing chromatic aberration in wood board drying process |
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Application publication date: 20150408 |