CN114789490B - Redwood furniture production line - Google Patents

Redwood furniture production line Download PDF

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Publication number
CN114789490B
CN114789490B CN202210402457.XA CN202210402457A CN114789490B CN 114789490 B CN114789490 B CN 114789490B CN 202210402457 A CN202210402457 A CN 202210402457A CN 114789490 B CN114789490 B CN 114789490B
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China
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aqueous solution
rosewood
soaking
soaking tank
pretreatment aqueous
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CN114789490A (en
Inventor
伍泳莉
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Zhongshan Wu's Grand View Garden Furniture Co ltd
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Zhongshan Wu's Grand View Garden Furniture Co ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/20—Compounds of alkali metals or ammonium
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/22—Compounds of zinc or copper
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • 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
    • B27K3/36—Aliphatic 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
    • B27K3/38—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
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic 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
    • 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
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/18—Manufacture or reconditioning of specific semi-finished or finished articles of furniture or of doors

Abstract

The invention discloses a redwood furniture production line, which comprises the following steps: the wood cutting device is used for cutting rosewood into boards a with preset thickness; a first soaking tank, wherein a first pretreatment aqueous solution is arranged in the first soaking tank, the solute of the first pretreatment aqueous solution comprises sodium chloride and cuprammonia complex, the temperature of the first pretreatment aqueous solution is 5-20 ℃, and the board a is sent into the first soaking tank for soaking for a preset period of time to obtain a board b; the second soaking tank is internally provided with a second pretreatment aqueous solution, the solute of the second pretreatment aqueous solution comprises sodium chloride, oxalic acid and quercetin, the temperature of the second pretreatment aqueous solution is-10-0 ℃, and the board b is sent into the second soaking tank to be soaked for a preset period of time, so that a board c is obtained; the rosewood drying device is used for drying the plate c; and (5) a furniture production workshop, namely processing the dried plate c into rosewood furniture.

Description

Redwood furniture production line
Technical Field
The invention relates to the technical field of redwood furniture production, in particular to a redwood furniture production line.
Background
Along with the continuous improvement of living standard, the quality requirements of people on furniture are higher and higher, and the solid wood classical furniture which is environment-friendly and texture is considered more. The solid wood classical furniture is furniture made of rosewood such as rosewood and the like, is a generic name for rare and high-quality hard wood furniture, and is widely popular as a high-grade consumer product in the prior life.
The rosewood used for preparing the solid wood classical furniture can be divided into two families, five genera, eight classes and twenty-nine classes, and the common uses mainly include Laos Dahong Suo Ruo, hongshi Ruo and Maimar Huali.
Rosewood grows slowly, is hard in material and has a growing period of more than hundreds of years; that is, rosewood is scarce in source and expensive. Therefore, in the processing process of rosewood, on one hand, adverse phenomena such as warping and the like are avoided, and further, the loss of raw materials is avoided; on the other hand, the phenomena of worm damage, mildew and the like are inhibited as much as possible so as to prolong the service life of the rosewood product.
In the traditional process, the method for avoiding warping mainly comprises a mechanical auxiliary method and a filling method; the mechanical auxiliary method is to press the wood by external force in the processing process to avoid deformation, the method can treat the symptoms and the root causes, and the wood still can deform if the temperature and the humidity of the environment change in the later use process, thereby bringing bad experience to consumers; the filling method is to fill resin in the wood and solidify the resin, after filling the holes of the wood, the expansion coefficient is reduced, and the expansion coefficients of different parts of the wood are more uniform, so that the wood deformation can be permanently restrained.
In the traditional process, the method for preventing the insect damage mainly comprises a soaking method and a coating method; the former is to soak the mildew-proof antibacterial agent in the processing course, and the latter is to brush the mildew-proof antibacterial paint after the wood product is formed. Both of these approaches present certain complications.
Most importantly, in the traditional process, deformation prevention and moth prevention are two independent steps, and the implementation is complicated. Therefore, it is very important to provide a simple and efficient method for preventing rosewood from deforming, being damaged by worms and being mildewed.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a redwood furniture production line which can prolong the service life of redwood furniture.
According to the invention, a redwood furniture production line comprises:
the wood cutting device is used for cutting rosewood into boards a with preset thickness;
a first soaking tank, wherein a first pretreatment aqueous solution is arranged in the first soaking tank, the solute of the first pretreatment aqueous solution comprises sodium chloride and cuprammonia complex, the temperature of the first pretreatment aqueous solution is 5-20 ℃, and the board a is sent into the first soaking tank for soaking for a preset period of time to obtain a board b;
the second soaking tank is internally provided with a second pretreatment aqueous solution, the solute of the second pretreatment aqueous solution comprises sodium chloride, oxalic acid and quercetin, the temperature of the second pretreatment aqueous solution is-10-0 ℃, and the board b is sent into the second soaking tank to be soaked for a preset period of time, so that a board c is obtained;
the rosewood drying device is used for drying the plate c;
and (5) a furniture production workshop, wherein the dried plate c is subjected to furniture production.
According to a preferred embodiment of the invention, there is at least the following advantageous effect:
(1) Cell walls, cell membranes and fiber filaments in rosewood expand and contract (wet expansion and dry shrinkage) along with the change of humidity, and the ratio of expansion to contraction of the rosewood in different directions is different due to the orientation of the cells and the fiber filaments, so that the rosewood eventually presents defects such as warping, cracking and the like along with the change of temperature.
In the redwood furniture production line provided by the invention, the cuprammonium complex is added into the first pretreatment aqueous solution, and the cuprammonium complex has certain solubility to cellulose, so that certain cracks (discontinuous positions) can be generated on the cell wall and the fiber yarn of the redwood, and the orientation of the expansion and contraction of the redwood can be restrained to a certain extent, and the phenomena such as warping and the like are avoided.
In the rosewood furniture production line provided by the invention, rosewood is soaked in 5-20 ℃ at first and then soaked in-10-0 ℃, and the cell membrane of the rosewood is also broken and the cell wall of the rosewood is damaged due to the volume change caused by the phase change or the cold-hot change of the aqueous solution. Thus, the occurrence of warping of rosewood and the like is further suppressed.
(2) The water in the rosewood comprises free water and adsorbed water, the free water is easy to remove, and the adsorbed water is combined with the cell walls of rosewood fiber cells and is difficult to remove.
The redwood furniture production line provided by the invention damages cell walls to a certain extent, so that the cell walls lose activity, therefore, the time consumption is shorter and the drying degree is more thorough in the drying process of the redwood drying device.
(3) One of the reasons why rosewood is precious is its color, and pigments in rosewood are easily soluble in organic solvents such as ethanol. In the production line of the red wood furniture, the water solution is adopted, so that the color of the red wood is kept better than that of the traditional treating agent containing organic solvents such as ethanol and the like, and the similar effects of drying and warping prevention are achieved.
(4) In the redwood furniture production line provided by the invention, the first pretreatment aqueous solution and the second pretreatment aqueous solution both comprise sodium chloride, so that after redwood is dried, the sodium chloride becomes fine crystals and remains in redwood tissues, on one hand, the supporting and deformation preventing effects are achieved, on the other hand, the corrosion preventing effects are achieved, and the sodium chloride is nontoxic and has little influence on the environment.
In addition, the second pretreatment aqueous solution also comprises oxalic acid containing two carboxyl groups and quercetin containing a plurality of hydroxyl groups, and the red wood cellulose also contains a large amount of hydroxyl groups, so that the quercetin is grafted in the red wood through the intermediation of the oxalic acid in the red wood furniture production line, and the quercetin plays roles in preventing worm damage and mildew in the later use process of the red wood product. And the quercetin has longer acting time because of grafting rather than physical adsorption, so that the service life of the obtained rosewood is prolonged.
In some embodiments of the invention, the rosewood comprises at least one of rosewood, sandalwood, rosewood, acid wood, and chicken wing wood.
In some embodiments of the invention, the hardwood comprises at least one of red and black hardwood.
In some embodiments of the invention, the method further comprises a first rosewood cleaning device for surface cleaning the sheet material a prior to entering the first soaking tank for soaking.
In a further embodiment of the present invention, the first rosewood cleaning apparatus is a high-pressure water gun that performs high-pressure flushing on the board a.
In some embodiments of the present invention, the first soaking tank is a pressure vessel, and the soaking pressure of the first soaking tank is 135-145 MPa when the plate a is soaked in the first soaking tank.
As the rosewood is fine and smooth in material quality and hard in texture, the phenomenon of uneven action effect is possible to occur by soaking at normal temperature and normal pressure: that is, the part directly contacted with the first pretreatment aqueous solution has excessive action of the cuprammonium complex, more dissolution of cellulose and the rest has insufficient action. The first soaking tank is a pressure container, and when the plate a is soaked in the first soaking tank, the first soaking tank provides 135-145 MPa pressure, so that the problem of uneven action effect can be effectively avoided, and the action duration can be effectively shortened.
In some embodiments of the invention, the soaking time of the plate a in the first soaking tank is 5-8 h.
In the time, the texture of the wood is not damaged on the basis of obtaining a certain warping prevention effect. If it exceeds 8 hours, the texture of rosewood may be destroyed due to the solubility of the cuprammonium complex, affecting the use.
In some embodiments of the invention, the concentration of sodium chloride in the first aqueous pretreatment solution is from 5 to 26wt%.
In some embodiments of the invention, the molar concentration of the copper ammine complex in the first aqueous pretreatment solution is in the range of 8 to 15mmol/L. Thereby, an optimal warping prevention effect can be obtained and damage to the rosewood texture can be avoided to the greatest extent.
In some embodiments of the invention, the first aqueous pretreatment solution is prepared by: after mixing the copper sulfate solution and the ammonia water, a saturated sodium chloride solution was added thereto and the volume was fixed.
In some embodiments of the invention, in the method for preparing the first pretreated aqueous solution, the molar ratio of the copper sulfate to the ammonia water is 1:7-8.
In some embodiments of the invention, the temperature during the preparation of the first aqueous pretreatment solution is 50 to 60 ℃. Thus, the copper ammonia complex can be produced better and is less likely to fail.
In some embodiments of the invention, the sheet material a is in an anaerobic environment within the first soaking tank when the first soaking tank is soaked. Whereby the effect of the copper ammine complex can be ensured.
In some embodiments of the invention, the second soaking tank is a pressure vessel, and the soaking pressure of the second soaking tank is 135-145 MPa when the plate b is soaked in the second soaking tank. The pressure is the same as the pressure in the first tank.
In some embodiments of the invention, the soaking time of the plate b in the second soaking tank is 18-24 h. The soaking time can promote the permeation of quercetin and oxalic acid to rosewood.
In some embodiments of the invention, the concentration of sodium chloride in the second aqueous pretreatment solution is from 5 to 26wt%.
In some embodiments of the invention, the concentration of quercetin in the second pre-treatment aqueous solution is 1-3 mmol/L.
In some embodiments of the invention, the molar ratio of oxalic acid to quercetin in the second pre-treatment aqueous solution is 1:0.3-0.8.
The effect of the excess oxalic acid is to promote a complete reaction of the quercetin.
In some embodiments of the invention, a second rosewood cleaning apparatus is also included for cleaning the sheet material c. The method has the function of cleaning the residual sodium chloride on the surface of the rosewood, and avoiding that sodium chloride crystals separated out from the surface of the rosewood after drying influence the appearance of the rosewood.
In some embodiments of the present invention, the rosewood drying apparatus includes a plurality of stages of drying chambers, each stage of drying chambers being provided therein with a drying air flow supply device for supplying a warm air flow, the temperature of the warm air flow supplied from the drying air flow supply device in each stage of drying chambers being gradually decreased, and the sheet material c is gradually dried in each stage of drying chambers.
In some embodiments of the present invention, the rosewood drying apparatus includes three stages of drying chambers, and the temperature of the warm air stream supplied from the drying air stream supply device in each stage of the drying chamber is 50 to 60 ℃, 30 to 40 ℃ and 20 to 30 ℃ in this order.
The reasons for the warping and cracking of rosewood also comprise uneven drying, namely when the drying speed is too high, the surface drying speed is faster than that of the interior, and the cracking and warping can occur due to the wet swelling and drying shrinkage. The invention adopts a multi-stage drying chamber, and the plate c is dried step by step in each stage of the drying chamber. The above problems can be effectively avoided.
The esterification reaction of quercetin and oxalic acid penetrating into the rosewood can be enhanced in the drying process at 50-60 ℃.
In some embodiments of the invention, the air humidity in the drying chamber is 60-75 g/m when the air temperature is 50-60℃ 3 。
In some embodiments of the invention, the air travel speed in the drying chamber is 1.5m/s-2.5m/s when the air temperature is 50-60 ℃.
In some embodiments of the invention, the drying time is 12 to 36 hours when the air temperature is 50 to 60 ℃.
In some embodiments of the invention, the air humidity in the drying chamber is 18-22 g/m when the air temperature is 30-40℃ 3 。
In some embodiments of the invention, the air travel speed in the drying chamber is 2m/s-3m/s when the air temperature is 30-40 ℃.
In some embodiments of the invention, the drying time is 12 to 36 hours when the air temperature is 30 to 40 ℃.
In some embodiments of the invention, the humidity of the air is 5 to 10g/m when the temperature of the air is 20 to 30 DEG C 3 。
In some embodiments of the invention, the air travel speed in the drying chamber is 4-5 m/s when the air temperature is 20-30 ℃.
In some embodiments of the invention, the drying time is 24 to 48 hours when the air temperature is 20 to 30 ℃.
The product of the advancing speed and the diameter of the pipe is the flow velocity of air.
Therefore, the temperature is gradually reduced to the actual use temperature of the rosewood, and appearance change caused by sudden cooling of high Wen Gongmu can be effectively avoided.
In addition, in each stage, the air humidity is lower than the saturation humidity of the air at the temperature, so that the residual moisture in the rosewood can be gradually and outwards diffused under the gradient effect of the humidity, and a uniform drying method is formed.
Meanwhile, the closer the temperature is to the room temperature (about 25 ℃) the faster the air proceeds, the smaller the proportion of its humidity to the saturation humidity at that temperature, and thus the faster the drying speed. In this temperature range, the rate of drying shrinkage of the rosewood is significantly reduced because the rosewood is already substantially completely dried at 20 to 30 ℃, and thus, even if the drying rate is high, serious deformation of the rosewood is not caused.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
Example 1
The embodiment provides a redwood furniture production line, which comprises the following specific processes:
D1. raw material preparation:
preparing a first pretreatment aqueous solution: dropwise adding 8mol/L ammonia water into 0.2mol/L copper sulfate solution at 50 ℃, wherein precipitate is generated firstly in the process and disappears, and the molar ratio of copper sulfate to ammonia water is 1:7.5 (calculated by nitrogen in the ammonia water); after sodium chloride was added thereto, the mixture was diluted to a sodium chloride concentration of 7% by weight, and the concentration of the copper ammine complex was 12mmol/L (in terms of the number of copper atoms); and cooling to obtain the first pretreated aqueous solution, and putting the prepared first pretreated aqueous solution into a first soaking tank.
Preparing a second pretreatment aqueous solution: sodium chloride, water, oxalic acid and quercetin (CAS: 117-39-5) were mixed to give a sodium chloride concentration of 7wt%, quercetin of 2mmol/L, and a molar ratio of quercetin to oxalic acid of 0.4:1. And putting the prepared second pretreatment aqueous solution into a second soaking tank.
Cutting red acid wood into plates according to the required thickness by using sawing equipment to obtain the plates a.
Cleaning the surface of rosewood: the surface of the plate a is purged by using a high-pressure water gun, so that the residual wood dust is prevented from polluting the first pretreatment aqueous solution or blocking capillary holes on the surface of wood.
Feeding a plate a into a first soaking tank, introducing nitrogen into the first soaking tank so as to remove oxygen in the tank, keeping the temperature in the tank at 15 ℃, soaking the cleaned wood in the first soaking tank, maintaining the pressure of 140MPa in the first soaking tank, and soaking the plate a for 5 hours to obtain a plate b;
and (3) feeding the plate b into a second soaking tank, introducing nitrogen into the second soaking tank so as to remove oxygen in the tank, keeping the temperature in the tank at-3 ℃, keeping the pressure of 140MPa in the second soaking tank, soaking the plate b for 20 hours to obtain a plate c, and cleaning the plate c by using second rosewood cleaning equipment after taking out the plate c.
And sending the cleaned plate c into a drying chamber for drying, wherein the rosewood drying device comprises three drying chambers, and the plate c is dried step by step in the three drying chambers, and is concretely as follows:
the drying air flow supply device in the first drying chamber provides a temperature of 55deg.C and a humidity of 65g/m 3 And flows over the surface of the sheet c at a traveling speed of 2 m/s; the treatment time is 15h;
the drying air flow supply device in the second drying chamber provides a temperature of 35 ℃ and a humidity of 20g/m 3 And flows over the surface of the sheet c at a travel speed of 2.5 m/s; the treatment time is 15h;
the drying air flow supply device in the third drying chamber provides a temperature of 25 ℃ and a humidity of 8g/m 3 And flows over the surface of the sheet c at a travel speed of 4.5 m/s; the treatment time was 36h.
And transferring the dried plate c to a furniture production workshop, and processing the dried plate c into rosewood furniture.
Example 2
The embodiment provides a mahogany furniture production line, which comprises the following production processes:
raw material preparation:
preparing a first pretreatment aqueous solution: dropwise adding 8mol/L ammonia water into 0.2mol/L copper sulfate solution at 50 ℃, wherein precipitate is generated firstly in the process and disappears, and the molar ratio of copper sulfate to ammonia water is 1:7.5 (calculated by nitrogen in the ammonia water); after sodium chloride was added thereto, the mixture was diluted to a sodium chloride concentration of 20% by weight, and the concentration of the copper ammine complex was 10mmol/L (in terms of the number of copper atoms); cooling to obtain the final product. The prepared first pretreatment aqueous solution is put into a first soaking tank.
Preparing a second pretreatment aqueous solution: sodium chloride, water, oxalic acid and quercetin (CAS: 117-39-5) were mixed to give a sodium chloride concentration of 7wt%, quercetin of 2mmol/L, and a molar ratio of quercetin to oxalic acid of 0.8:1. And putting the prepared second pretreatment aqueous solution into a second soaking tank.
Cutting red acid wood into plates according to the required thickness by using sawing equipment to obtain the plates a.
Feeding a plate a into a first soaking tank, introducing nitrogen into the first soaking tank so as to remove oxygen in the tank, keeping the temperature in the tank at 10 ℃, soaking the cleaned wood in the first soaking tank, maintaining the pressure of 140MPa in the first soaking tank, and soaking the plate a for 5 hours to obtain a plate b;
and (3) feeding the plate b into a second soaking tank, introducing nitrogen into the second soaking tank so as to remove oxygen in the tank, keeping the temperature in the tank at-10 ℃, keeping the pressure of 140MPa in the second soaking tank, soaking the plate b for 20 hours to obtain a plate c, and cleaning the plate c by using second rosewood cleaning equipment after taking out the plate c.
And (3) conveying the cleaned plate c into a drying chamber for drying, wherein the drying chamber comprises three drying chambers, and the plate c is dried step by step in the three drying chambers, and specifically comprises the following steps:
the drying air flow supply device in the first drying chamber provides a temperature of 55deg.C and a humidity of 70g/m 3 And flows through the sheet c surface at a travel speed of 2m/sA noodle; the treatment time is 30 hours;
the drying air flow supply device in the second drying chamber provides a temperature of 35 ℃ and a humidity of 20g/m 3 And flows over the surface of the sheet c at a travel speed of 2.5 m/s; the treatment time is 30 hours;
the drying air flow supply device in the third drying chamber provides a temperature of 25 ℃ and a humidity of 8g/m 3 And flows over the surface of the sheet c at a travel speed of 4.5 m/s; the treatment duration was 44h.
And transferring the dried plate c to a furniture production workshop, and processing the dried plate c into rosewood furniture.
Comparative example 1
The comparison example provides a redwood furniture production line, and the specific process is different from that of the embodiment 1:
the first aqueous pretreatment solution in the first soaking tank did not include copper ammonia complex, but was only aqueous sodium chloride solution having a concentration of 7 wt%.
Comparative example 2
The embodiment provides a mahogany furniture production line, and the specific process is different from that of embodiment 1:
the temperature of the second aqueous pretreatment solution in the second soaking tank was 5 ℃.
Comparative example 3
The embodiment provides a mahogany furniture production line, and the specific process is different from that of embodiment 1:
the first aqueous pretreatment solution in the first soaking tank does not include sodium chloride.
Test examples
This test example tested the properties of the red acid wood obtained in examples 1 to 2 and comparative examples 1 to 3. Wherein:
the water content reference number is GB/T1931-2009, and the average value of 10 parallel samples is tested;
the antibacterial rate is tested by a standard file with reference number LY/T1926-2010, and the average value of 10 parallel samples is measured;
in a standard file with insect-preventing effect reference numbers GB/T29399-2012, the section 9.2 confirms the insect-preventing effect of wood, and tests are carried out; the specific test method and the standard file are different as follows: in the test block treatment process, the test blocks are directly subjected to insect test inoculation by using the test blocks of the red acid wood obtained in the examples 1-2 and the comparative examples 1-3 without soaking the test blocks with insect repellent again, and the ratio of the number of insects to the number of inoculated insects after 3 months is recorded; the test block used in the control test is a red acid wood block which is subjected to surface cleaning only (step D1 of reference example 1) and then is dried in an oven at 60 ℃; the number of the parallel test blocks is 10;
wood grain tensile strength reference number GB/T1938-2009.
The appearance is carried out by adopting a visual inspection method, and the appearance is qualified in terms of no cracking and no warping.
The test results are shown in Table 1.
TABLE 1 Properties of the Red acid wood obtained in examples 1 to 2 and comparative examples 1 to 3
The results in Table 1 show that examples 1-2 have short drying times of the obtained red acid wood within the parameters and step ranges provided by the invention; the water content is low, and the requirements of different areas on the water content of furniture timber are met; has good antibacterial rate, mothproof performance, tensile strength and appearance.
Comparison of the results of example 1 and comparative example 1 shows that if the copper ammine complex is not included in the first pretreatment aqueous solution, the cell wall or the fiber filament cannot be effectively destroyed and still has a certain activity, so that the water bound thereon is difficult to remove within the time provided by the present invention, and the obtained red acid wood has a certain warping property after drying due to the activity of the fiber filament, i.e., the obtained wood does not satisfy the preparation of high-grade redwood furniture.
Comparison of the results of example 1 and comparative example 2 shows that if the temperature of the second aqueous pretreatment solution is 5 ℃, the temperature difference between the first aqueous pretreatment solution and the second aqueous pretreatment solution is small, and the volume change due to the temperature is insufficient to destroy the function of the cell walls, thereby achieving a technical effect similar to that of comparative example 1.
Comparison of the results of example 1 and comparative example 3 shows that, if sodium chloride is not included in the first pretreatment aqueous solution, when the red acid wood is transferred to the second pretreatment aqueous solution having a temperature lower than 0 ℃, the first pretreatment aqueous solution absorbed in the red acid wood is changed from a liquid phase to a solid phase, and thus the volume change caused by the change damages fibrous tissues such as cell walls. Therefore, the obtained red acid wood has excellent water content and appearance. However, this also affects the infiltration of the second aqueous pretreatment solution into the red acid wood, wherein both quercetin and sodium chloride remain on the surface of the red acid wood, whereby the antibacterial and mothproof properties thereof are significantly reduced. Therefore, the redwood furniture production line can reduce the loss of redwood and reduce the production cost of redwood furniture; meanwhile, the service life of the rosewood product can be prolonged.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (4)

1. A redwood furniture production line, comprising:
the wood cutting device is used for cutting rosewood into boards a with preset thickness;
the device comprises a first soaking tank, wherein a first pretreatment aqueous solution is arranged in the first soaking tank, the solute of the first pretreatment aqueous solution comprises sodium chloride and cuprammonia complex, the temperature of the first pretreatment aqueous solution is 5-20 ℃, and the concentration of the sodium chloride in the first pretreatment aqueous solution is 5-26 wt%; feeding the plate a into the first soaking tank for soaking for 5-8 hours to obtain a plate b; the soaking pressure of the first soaking tank is 135-145 MPa;
the preparation method of the first pretreatment aqueous solution comprises the following steps: mixing a copper sulfate solution and ammonia water according to the molar ratio of 1:7-8 of the copper sulfate to the ammonia water at 50-60 ℃, adding a saturated sodium chloride solution into the mixture, and fixing the volume;
the second soaking tank is internally provided with a second pretreatment aqueous solution, the solute of the second pretreatment aqueous solution comprises sodium chloride, oxalic acid and quercetin, the temperature of the second pretreatment aqueous solution is-10-0 ℃, and the board b is sent into the second soaking tank to be soaked for a preset period of time, so that a board c is obtained; the soaking pressure of the second soaking tank is 135-145 MPa;
the rosewood drying device is used for drying the plate c; the rosewood drying device comprises a three-stage drying chamber, wherein the temperature of the warm air flow supplied by drying air flow supply equipment in the three-stage drying chamber is 50-60 ℃, 30-40 ℃ and 20-30 ℃ in sequence;
and (5) a furniture production workshop, namely processing the dried plate c into rosewood furniture.
2. The redwood furniture production line according to claim 1, wherein: the molar concentration of the copper ammonia complex in the first pretreatment aqueous solution is 8-15 mmol/L.
3. The redwood furniture production line according to claim 1, wherein: the soaking time of the plate b in the second soaking tank is 18-24 h.
4. The redwood furniture production line according to claim 1, wherein: the molar ratio of oxalic acid to quercetin in the second pretreatment aqueous solution is 1:0.3-0.8.
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