CN111558976A - Eucalyptus wood door stem material water content regulation and control technology - Google Patents
Eucalyptus wood door stem material water content regulation and control technology Download PDFInfo
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- CN111558976A CN111558976A CN202010319309.2A CN202010319309A CN111558976A CN 111558976 A CN111558976 A CN 111558976A CN 202010319309 A CN202010319309 A CN 202010319309A CN 111558976 A CN111558976 A CN 111558976A
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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
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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
- 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
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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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
- B27K5/001—Heating
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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
- B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
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- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a technology for regulating and controlling the water content of eucalyptus solid wood door stems, and belongs to the field of wood processing. The technology comprises the following steps: cutting eucalyptus into boards, drying at 45-60 ℃ until the water content is 25-35%, soaking the boards for 16-20h by using a stabilizer under a vacuum condition, putting the boards and the stabilizer into a reaction kettle together, and taking out the boards after the reaction is finished and the boards are naturally cooled; putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 2-10% of the required water content; adjusting the temperature to 38-50 ℃, and keeping the water content of the wood board to 9-14%. The technology of the invention can accurately control the moisture content required by the stem, maintain the quality of the stem and avoid the cracking of the processed stem.
Description
Technical Field
The invention relates to the field of wood processing, in particular to a technology for regulating and controlling the water content of eucalyptus solid wood door stems.
Background
With the continuous improvement of living standard, the grade requirements of people on furniture are gradually improved, wherein wooden furniture is particularly popular with consumers. Along with the progress of science and technology, the connection between every part of the world is more and more recent, and the wooden furniture produced at home is sold all over the world, and simultaneously, the difficult problem in the technology is brought to the wooden furniture industry: due to the large temperature difference and different humidity in different regions on the earth, the frame wood of the wooden furniture is very easy to crack and deform, so that the appearance of the wooden furniture is damaged, and great troubles are brought to wooden furniture enterprises and consumers.
Eucalyptus is a light-colored broad-leaved wood with a tight and irregular grain. The sapwood layer is wider and is white to light pink; the heartwood is light brown red. Eucalyptus is a fast growing wood, is not tough, light in weight and easy to break, and other tough, smooth and heavy sundries should be selected. Eucalyptus is widely grown in south china and has many uses in the production of cabinets and furniture, particularly for the production of antique furniture. Eucalyptus is generally cut and then placed for a period of time, and after the eucalyptus wood is dried to a certain degree, the subsequent processing is carried out. Most of the placed wood is directly exposed to the sun under the sunlight, the problem of wood cracking and splitting in the subsequent processing process is caused by the treatment result, and the wood board is easy to pulverize.
The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention aims to provide a technology for regulating and controlling the water content of eucalyptus solid wood door stems, and aims to solve the technical problems that in the prior art, the water content is not high in control precision in stem processing, and cracking is easy to occur after processing.
For this purpose, the invention proposes the following solutions:
a technology for regulating and controlling the water content of eucalyptus solid wood stemwood comprises the following steps:
s1: cutting eucalyptus wood into boards, drying at 45-60 ℃ until the water content is 25-35%, soaking stabilizer solution which is obtained by uniformly mixing a stabilizer and water in a mass ratio of 1:20 in vacuum for 16-20h, putting the boards and the stabilizer into a reaction kettle together, and taking out the boards after the reaction is finished and natural cooling;
s2: putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 2-10% of the required water content;
s3: adjusting the temperature to 38-50 ℃, and keeping the water content of the wood board to 9-14%.
Preferably, in the step S1, the eucalyptus wood is cut into boards and dried at 52 ℃ to have a moisture content of 31%.
Preferably, in the step S1, the vacuum condition is 5 × 10-1 × 10-1Pa, and the temperature is kept between 30 and 50 ℃.
Preferably, in the step S1, the reaction condition of the reaction kettle is heating at 50-70 ℃ for 1-3 h.
Preferably, in the step S2, when the moisture content of the dried wood board is 5% of the desired moisture content, the drying is stopped after the normal pressure is recovered.
Preferably, in the step S3, the temperature is adjusted to 43 ℃, and the water content of the wood board is maintained to be 18%.
Preferably, in step S2, the pressure drying process includes: firstly, keeping the temperature at 24-27 ℃ for 2-6h under 10-20 kPa; then raising the temperature to 30-40kPa, and keeping the temperature at 32-39 ℃ for 2-4 h; finally, the treatment is finished after the temperature is kept for 6 to 10 hours at the temperature of between 40 and 58 ℃ and under the pressure of between 50 and 75 kPa.
Preferably, in step S2, the pressure drying process includes: firstly, keeping the temperature at 26 ℃ for 4h under 16 kPa; then raising the temperature to 35kPa, and keeping the temperature at 36 ℃ for 2.7 h; finally, the treatment is finished by keeping the temperature at 62kPa and 52 ℃ for 9 h.
Preferably, the stabilizer comprises the following components in parts by weight: 25-40 parts of methyl silicic acid, 18-30 parts of pine oil, 16-21 parts of white wax, 11-18 parts of aluminum sulfate, 8-15 parts of calcium carbonate, 6-11 parts of titanium dioxide, 4-7 parts of methyl hydroxybenzoate, 2-5 parts of sodium silicate, 6-15 parts of triethanolamine, 4-9 parts of succinic acid and 3-7 parts of coconut oil alcohol sodium sulfate.
Preferably, the stabilizer comprises the following components in parts by weight: 32 parts of methyl silicic acid, 24 parts of pine oil, 18 parts of white wax, 15 parts of aluminum sulfate, 11 parts of calcium carbonate, 8 parts of titanium dioxide, 5 parts of methyl hydroxybenzoate, 4 parts of sodium silicate, 10 parts of triethanolamine, 6 parts of succinic acid and 5 parts of cocoalcohol sodium sulfate.
Compared with the prior art, the invention has the advantages that:
1. as can be seen from Table 1, the actual water content and the regulated water content of examples 1 to 3 differ by 3.6%, 5.6% and 5.0%, respectively, which indicates a higher accuracy. The regulation and control method has high automation degree and is suitable for large-scale production.
2. In the added stabilizer, aluminum sulfate, titanium dioxide and methyl hydroxybenzoate generate corresponding synergistic effect, the static bending strength of the stem is synergistically improved, and the dry shrinkage rate is reduced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Example 1
A technology for regulating and controlling the water content of eucalyptus solid wood stemwood comprises the following steps:
s1: cutting eucalyptus into boards, drying at 52 ℃ until the water content is 31%, soaking for 18h in a stabilizer solution prepared by uniformly mixing a stabilizer and water in a mass ratio of 1:20 under a vacuum condition, then putting the boards and the stabilizer into a reaction kettle together, heating for 2h at 62 ℃, and taking out the boards after the reaction is finished and natural cooling;
s2: putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 5% of the required water content;
s3: and adjusting the temperature to 43 ℃, and keeping the water content of the wood board to 11%.
The vacuum condition was 20Pa, and the temperature was maintained at 45 ℃.
In step S2, the pressure drying process includes: firstly, keeping the temperature at 26 ℃ for 4h under 16 kPa; then raising the temperature to 35kPa, and keeping the temperature at 36 ℃ for 2.7 h; finally, the treatment is finished by keeping the temperature at 62kPa and 52 ℃ for 9 h.
The stabilizer comprises the following components in parts by weight: 32 parts of methyl silicic acid, 24 parts of pine oil, 18 parts of white wax, 15 parts of aluminum sulfate, 11 parts of calcium carbonate, 8 parts of titanium dioxide, 5 parts of methyl hydroxybenzoate, 4 parts of sodium silicate, 10 parts of triethanolamine, 6 parts of succinic acid and 5 parts of cocoalcohol sodium sulfate.
Example 2
A technology for regulating and controlling the water content of eucalyptus solid wood stemwood comprises the following steps:
s1: cutting eucalyptus into boards, drying at 45 ℃ until the water content is 25%, soaking a stabilizer solution which is uniformly mixed by using a stabilizer and water according to the mass ratio of 1:20 for 16h under a vacuum condition, then putting the boards and the stabilizer into a reaction kettle together, heating at 50 ℃ for 1h, and taking out the boards after the reaction is finished and natural cooling;
s2: putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 2% of the required water content;
s3: adjusting the temperature to 38 ℃, and keeping the water content of the wood board to 9%.
The vacuum conditions are as follows: 50Pa, the temperature is kept at 30 ℃.
In step S2, the pressure drying process includes: firstly, keeping the temperature at 24 ℃ for 2h under 10 kPa; then raising the temperature to 30kPa, and keeping the temperature at 32 ℃ for 2 h; finally, the treatment is finished by keeping the temperature at 50kPa and 40 ℃ for 6 h.
Preferably, the stabilizer comprises the following components in parts by weight: 25 parts of methyl silicic acid, 18 parts of pine oil, 16 parts of white wax, 11 parts of aluminum sulfate, 8 parts of calcium carbonate, 6 parts of titanium dioxide, 4 parts of methyl hydroxybenzoate, 2 parts of sodium silicate, 6 parts of triethanolamine, 4 parts of succinic acid and 3 parts of coconut oil alcohol sodium sulfate.
Example 3
A technology for regulating and controlling the water content of eucalyptus solid wood stemwood comprises the following steps:
s1: cutting eucalyptus into boards, drying at 60 ℃ until the water content is 35%, soaking the boards and the stabilizer solution uniformly mixed by the stabilizer and water according to the mass ratio of 1:20 in vacuum for 20 hours, then putting the boards and the stabilizer into a reaction kettle together, heating at 70 ℃ for 3 hours, and taking out the boards after the reaction is finished and natural cooling;
s2: putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 10% of the required water content;
s3: adjusting the temperature to 50 ℃, and keeping the water content of the wood board to be 14%.
The vacuum conditions are as follows: 0.1Pa, the temperature is kept at 50 ℃.
In step S2, the pressure drying process includes: firstly, keeping the temperature at 27 ℃ for 6h under 20 kPa; then raising the temperature to 40kPa, and keeping the temperature at 39 ℃ for 4 h; finally, the treatment is finished by keeping the temperature at 75kPa and 58 ℃ for 10 h.
The stabilizer comprises the following components in parts by weight: 40 parts of methyl silicic acid, 30 parts of pine oil, 21 parts of white wax, 18 parts of aluminum sulfate, 15 parts of calcium carbonate, 11 parts of titanium dioxide, 7 parts of methyl hydroxybenzoate, 5 parts of sodium silicate, 15 parts of triethanolamine, 9 parts of succinic acid and 7 parts of cocoalcohol sodium sulfate.
Comparative example 1
The control steps and the components of the stabilizer in the control technology are basically the same as those in example 1, except that aluminum sulfate is not added into the stabilizer, and the water content of the wood board is controlled to be 11%.
Comparative example 2
The control steps and the components of the stabilizer in the control technology are basically the same as those in example 1, except that titanium dioxide is not added into the stabilizer, and the water content of the wood board is controlled to be 11%.
Comparative example 3
The control steps and the components of the stabilizer in the control technology are basically the same as those in example 1, except that methyl hydroxybenzoate is not added into the stabilizer, and the water content of the wood board is controlled to be 11%.
Comparative example 4
The control steps and the components of the stabilizer in the control technology are basically the same as those in the example 1, except that aluminum sulfate, titanium dioxide and methyl hydroxybenzoate are not added into the stabilizer, and the water content of the wood board is controlled to be 11%.
The eucalyptus stems prepared in examples 1 to 3 and comparative examples 1 to 4 were tested, wherein the actual water content was tested according to GB/T3324-2008, the static bending strength was tested according to GB/T5849-2006, and the dry shrinkage was tested according to GB/T1932-2009, and the obtained results are shown in Table 1.
TABLE 1 Eucalyptus stem detection
| Group of | Water content (%) | Static bending strength (MPa) | Shrinkage (%) |
| Example 1 | 11.4 | 105 | 0.27 |
| Example 2 | 9.5 | 99 | 0.52 |
| Example 3 | 13.3 | 103 | 0.36 |
| Comparative example 1 | 9.9 | 91 | 0.84 |
| Comparative example 2 | 11.7 | 89 | 0.95 |
| Comparative example 3 | 12.5 | 93 | 0.76 |
| Comparative example 4 | 16.1 | 58 | 2.41 |
As can be seen from Table 1, the actual water content and the regulated water content of examples 1 to 3 differ by 3.6%, 5.6% and 5.0%, respectively, which indicates a higher accuracy. It can be seen from comparative examples 1-4 that the stabilizer affects the static bending strength and the dry shrinkage rate of the stem, and the performance of the stem is improved to a certain extent after the stabilizer with complete components is added.
In the stabilizer, the aluminum sulfate can be used as a filler for titanium dioxide, so that the specific surface free energy of the titanium dioxide is enhanced, the diffusion of the titanium dioxide in the stabilizer is promoted, and the uniformity is improved; the aluminum sulfate can improve the solubility of the methyl hydroxybenzoate after being uniformly mixed with the methyl hydroxybenzoate. Titanium ions in the titanium dioxide can enhance the strength of the stem material, wherein the polarity of Ti-O bonds in water is larger, water adsorbed on the surface is dissociated due to polarization, hydroxyl groups are easily formed, and the adsorbability of the methylparaben on the stem material surface can be enhanced by a large number of hydroxyl groups; the methyl hydroxybenzoate can enhance the adsorption of aluminum sulfate on the surface of titanium dioxide, enhance the adsorption of titanium dioxide on the surface of the stem, and improve the enhancing effect of titanium dioxide on the static bending strength of the stem. Combining the static bending strength and the dry shrinkage rate data of the example 1 and the comparative examples 1 to 4, it can be seen that the aluminum sulfate, the titanium dioxide and the methyl hydroxybenzoate in the stabilizer generate corresponding synergistic effect, the static bending strength of the stem is improved, and the dry shrinkage rate is reduced.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (10)
1. A technology for regulating and controlling the water content of eucalyptus solid wood stemwood is characterized by comprising the following steps:
s1: cutting eucalyptus wood into boards, drying at 45-60 ℃ until the water content is 25-35%, soaking stabilizer solution which is obtained by uniformly mixing a stabilizer and water in a mass ratio of 1:20 in vacuum for 16-20h, putting the boards and the stabilizer into a reaction kettle together, and taking out the boards after the reaction is finished and natural cooling;
s2: putting the wood board into a pressure furnace for pressure drying process treatment, monitoring the water content in the treatment process, and recovering normal pressure and stopping drying when the water content of the dried wood board is 2-10% of the required water content;
s3: adjusting the temperature to 38-50 ℃, and keeping the water content of the wood board to 9-14%.
2. The technique for controlling moisture content of stem material of eucalyptus wood door as claimed in claim 1, wherein in step S1, the eucalyptus wood is cut into boards and dried at 52 ℃ until the moisture content is 31%.
3. The eucalyptus wood door stem water content control technology as claimed in claim 1, wherein in step S1, the vacuum condition is 5 × 10-1 × 10-1Pa, and the temperature is kept between 30 and 50 ℃.
4. The eucalyptus wood door stem water content control technology as claimed in claim 1, wherein in step S1, the reaction condition of the reaction kettle is heating at 50-70 ℃ for 1-3 h.
5. The eucalyptus wood door stem moisture content control technique as claimed in claim 1, wherein in step S2, when the moisture content of the dried wood board is 5% of the desired moisture content, the drying is stopped after recovering the normal pressure.
6. The technique for controlling the moisture content of the stem material of the eucalyptus solid wood door as claimed in claim 1, wherein the temperature is adjusted to 43 ℃ in step S3, and the moisture content of the wood board is maintained at 18%.
7. The eucalyptus solid wood door stem water content control technology as set forth in claim 1, wherein in the step S2, the pressure drying process is as follows: firstly, keeping the temperature at 24-27 ℃ for 2-6h under 10-20 kPa; then raising the temperature to 30-40kPa, and keeping the temperature at 32-39 ℃ for 2-4 h; finally, the treatment is finished after the temperature is kept for 6 to 10 hours at the temperature of between 40 and 58 ℃ and under the pressure of between 50 and 75 kPa.
8. The eucalyptus solid wood door stem water content control technology as claimed in claim 1 or 7, wherein in the step S2, the pressure drying process is as follows: firstly, keeping the temperature at 26 ℃ for 4h under 16 kPa; then raising the temperature to 35kPa, and keeping the temperature at 36 ℃ for 2.7 h; finally, the treatment is finished by keeping the temperature at 62kPa and 52 ℃ for 9 h.
9. The eucalyptus solid wood door stem water content control technology as set forth in claim 1, wherein the stabilizer comprises the following components in parts by weight: 25-40 parts of methyl silicic acid, 18-30 parts of pine oil, 16-21 parts of white wax, 11-18 parts of aluminum sulfate, 8-15 parts of calcium carbonate, 6-11 parts of titanium dioxide, 4-7 parts of methyl hydroxybenzoate, 2-5 parts of sodium silicate, 6-15 parts of triethanolamine, 4-9 parts of succinic acid and 3-7 parts of coconut oil alcohol sodium sulfate.
10. The eucalyptus solid wood door stem water content control technology as claimed in claim 1 or 9, wherein the stabilizer comprises the following components in parts by weight: 32 parts of methyl silicic acid, 24 parts of pine oil, 18 parts of white wax, 15 parts of aluminum sulfate, 11 parts of calcium carbonate, 8 parts of titanium dioxide, 5 parts of methyl hydroxybenzoate, 4 parts of sodium silicate, 10 parts of triethanolamine, 6 parts of succinic acid and 5 parts of cocoalcohol sodium sulfate.
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Cited By (1)
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| CN113134881A (en) * | 2021-04-30 | 2021-07-20 | 南宁市磨氏林圣木业有限公司 | Preparation method of high-performance anti-warping practical plywood |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134881A (en) * | 2021-04-30 | 2021-07-20 | 南宁市磨氏林圣木业有限公司 | Preparation method of high-performance anti-warping practical plywood |
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