The application of wood-based panels can replace 1m3 of wood with 3m3 of wood. In terms of infrastructure, interior decoration, furniture, transportation, water conservancy construction, etc., wood-based panels have been used in recent years, especially with the rise of renovation, wood-based panels. Has become an indispensable and important role. According to the latest statistics, in 2001, the output of China's wood-based panels reached 21,108,200 m3, including 570,100 m3 of fiberboard, 344.53 million m3 of particleboard, 90.06 million m3 of plywood, and 292,200 m3 of other wood-based panels. In the next 15 years, China only needs 30 million m3 of wood-based panels in the construction, furniture and decoration industries. It is estimated that by 2010, the output of wood-based panels will reach 35 million m3 to meet social needs. A large number of wood-based panels require veneering of high-quality wood. Precious wood such as black walnut is a high-grade decorative material, which is popular among people. Although its price is 10,000 to 20,000 yuan/m3, it is still welcomed by the market, but its resources are becoming less and less. Wood dyeing is an effective method to increase the added value of inferior wood, especially fast-growing hardwood. It is a high-tech processing method for wood. Therefore, the thin wood dyeing and veneering technology of precious wood such as artificial walnut imitation black walnut is born. It is increasingly popular. Since the 1960s, the techniques of dyeing wood have been studied in Japan's Okawa, Kiyoshi Yoko, and Yada Maoshu. Some countries also have patents and products on thin wood dyeing technology. China has been exploring and practicing wood dyeing since the 1990s. The thin wood imitation black walnut dyeing technology is to use quick-growing wood such as cavities, poplars, or ordinary imported tropical wood, and cut into thin wood with a thickness of 0 13～0 15mm. After dyeing, it is dyed to be close to the natural wood color such as natural black walnut. Processing technology. In the dyeing process, the thin wood is not broken, the dyeing cost is low, the dyeing liquid can be recycled, and there is no pollution, and it is an environmentally friendly product. The dyed thin wood is uniform in color and resistant to water and light. The artificial board imitation black walnut thin wood veneer is to stick the dyed thin wood glue on the surface of the artificial board, increase the decorative effect of the artificial board and increase its added value. Ordinary wood-based panel veneer technology is divided into dry-drying method and wet-sticking method from the technical point of view. At present, industrial production is mainly based on wet-laid, from processing methods, mechanical veneers and manual veneers, mechanical veneers Veneer. The imitation black walnut thin wood dyeing and veneering technology is mainly composed of thin wood planing, imitation black walnut thin wood dyeing and wood-based veneer veneer. According to the author's operating experience [3, 4], the precautions in the process are briefly described as follows.
1 Thin wood planing process: logs → splitting → cooking → planing → planing → stacking → cutting.
1) Logs: Dabaimu, Aiyousi, Paulownia, ash, etc. After the logs arrive at the factory, they should be peeled and cut off.
2) Splitting: Set the saw according to the requirements of the product. At present, due to the good sales of the straight-grain veneer, the four-point sawing method is generally adopted. If there are many tree shadows required, the number of diameter cutting boards should be guaranteed as much as possible. If it is a mountain, ensure as many strings as possible.
3) Cooking: It is the key section of wood cutting. The temperature is 60-100 °C, and the temperature is raised at 10 °C/h, and the heating time is 30-60 hours. The temperature is too high, the temperature rises too fast, the energy consumption is large, the cracking of the logs is easy to occur, and there is a color difference; the temperature is too low, and the cooking time is too long. The time is too short, the degree of softening inside and outside is different, and the color is inconsistent. The most critical is that due to the different moisture content inside and outside, the wood is bent before cutting, so that the thin wood is reduced or scrapped.
4) Planing surface: remove the pollution caused by cooking on the wooden surface, especially the iron pollution.
5) Slice: The thickness of the thin wood is 0 13 ~ 0 15mm, depending on the wood variety and production process requirements. The thin wood is too thin, fragile and transparent, which increases the difficulty of the veneer section. Thin wood is too thick, which increases the cost and makes dyeing difficult.
6) Code placement: Count and arrange the thin wood in order. In this process, the defects of unqualified thin wood, such as uneven thickness, knots, skin, decay, discoloration, etc. are eliminated.
7) Shearing: Shearing into thin wood strips of 5~16cm width, 6~10cm thin wood is easy to stick, and the finished board has a good grade rate. In addition, defects are further removed during this process.
2 Imitation black walnut thin wood dyeing process dyeing process: thin wood → dyeing solution → dyeing → washing → fixing → code.
1) Thin wood: After careful selection, remove the unqualified thin wood and cage.
2) Dyeing solution: A dye and ratio: dyes suitable for wood dyeing include acid dyes, weak acid dyes, direct dyes, etc., depending on the wood variety, color depth and customer requirements [5]. The basic ratio of the dye is red: dark blue: orange 80:15:5B auxiliary: NaCl, Na2CO3, penetrant, acetic acid, fixing agent, leveling agent, etc., depending on the production demand.
3) Dyeing: A dyeing process parameters: dye concentration 1%, appropriate amount of additives, dyeing temperature 60 ~ 90 ° C, dyeing time 2 ~ 4h. B process [6]: Prepare the dyeing solution in warm water, put the thin wood after the cage into the dyeing tank, compact, and heat to the required temperature at 2 °C/min, keep warm for 2~4h. The dye solution should be kept flowing during this period. C quality standard: the color inside and outside the thin wood is uniform, no obvious color difference, flat. D economic and technical indicators: through dyeing can greatly increase the added value of ordinary thin wood, so that the price of thin wood from 0 13 ~ 0 15mm increased from 0 5 ~ 1 yuan / m2 to 45 yuan / m2, the cost of dyeing treatment is 0 5 yuan / m2 .
4) Washing, fixing, etc.: The purpose is to remove the floating color and increase the binding force of the dye to the wood.
5) Code placement: Count and arrange in order. Remove the thin wood with dye defects. There are vertical and horizontal dyeing cylinders, each with its own advantages and disadvantages. Vertical equipment can be cut first and then dyed, easy to load and unload, the production volume is large, but the dyeing is uneven, the board surface flower. The production capacity of horizontal equipment is slightly smaller, which is inconvenient to load and unload, but the thin wood is easy to be dyed and dyed, and it is mainly dyed and then cut, and it can be cut first and then dyed. The material for the dyeing cylinder should be made of stainless steel. The heating device, the dyeing liquid flow device, the filtering device, the liquid inlet and outlet device, etc. should be considered, and suitable loading cages and lifting facilities should be considered. The main dyeing process is dye selection and color matching. Dyes are selected according to the wood material, product type and customer requirements. The dye type, performance and structure should be as close as possible. Under the condition that the target color is satisfied, the less dyes used, the better. In the dyeing industry production, in order to meet the customer's requirements for color, it is often necessary to mix and match dyes of different colors. This work is called color matching, also known as color matching. The color matching is based on the principle of "subtraction" color mixing. In practical applications, because the ideal three primary colors are not found, red, yellow and blue are often used as substitutes for the three primary colors. Before production, be sure to match the color, first through the laboratory to try to match the color, and then through the large test toning, to meet the requirements before mass production. Color matching is a complicated and meticulous work. In addition to having a keen color discrimination ability and rich practical experience, the color proofing personnel must master the necessary color knowledge. It is best to have a colorist with production experience to work.
3 Artificial board veneer process: substrate treatment → coating concealing agent → drying → coating → veneer → cold pressing → clean side → coarse sand → hot pressing → repair → sanding → classification → packaging.
1) Substrate treatment: check whether the bottom, degumming, glue, and putty are ensured to ensure the flatness of the substrate and not penetrate the bottom. Generally, the appearance of the substrate is controlled according to the requirements of the first grade of the national standard GB13009-91 tropical hardwood standard plywood standard, and the substrate error is within 0 2mm.
2) Applying concealing agent: The concealing agent is filled and covered, and the purpose is to not leak the bottom and reduce the amount of glue used. Commercially available finished products are available, but the color is small. You can also deploy it yourself as needed. Its composition is adhesive, pigment or dye, filler and the like. The color should be close to the color of the attached wood. After the concealing agent is applied, it is dried by a dryer.
3) Gluing: The adhesive used is a well-adjusted adhesive, white glue and color glue. White glue contains adhesive, viscosity-increasing flour, filler, and the like. The color of the color glue should be basically close to the color of the thin wood. In addition to the white glue component, it also contains dyes or pigments, but the pigment should not contain iron ions. White glue is easy to operate and has no pollution to the surface of the board. However, after sanding, the surface of the board is lightened, gray and floating. The color glue makes the color of the board look deep and stable, but the operation is difficult, and the glue that is exposed causes pollution to the board surface. Commonly used adhesives are milk white glue and urea-formaldehyde glue.
4) Veneer: Wet veneering process, using push-paste or digging technology for veneering. The seams of the seams should be neat, and the order of the textures should be separated to ensure that the ones on the board are consistent or consistent.
5) Cold pressing and clean side: usually cold pressing for 3~5h, the purpose is to reduce the hot pressing time and give the initial strength. After cold pressing, clean the edges and cut off the excess thin wood on both sides of the end. Care should be taken when cutting the ends to avoid tearing. Cause unnecessary drops.
6) Hot pressing: depending on the type of rubber, the panel is given enough strength. The top plate of the hot press machine should be equipped with a felt plate and a heat-resistant film.
7) Sanding and repairing: Sanding is divided into coarse sand and fine sand. After cold pressing, the water content of the slab is about 30%. Use 180-240# abrasive belt coarse sand, sanding amount is 0 03mm, remove the surface burrs, dust, stains and lamination. After hot pressing, the veneer should be repaired first; the glue, tear, and seam should be filled or subsidized with thin wood; then the unevenness should be flattened, and finally 80~120# sanding sand can be used to make the surface gloss And the color is well-proportioned.
8) Classification, packaging: According to product color, texture, defects, product inspection and grading. Pack the product according to standard packing conditions or user requirements.
One of the primary advantages of our hospital beds is their adjustability. These beds can be easily adjusted to various positions, allowing patients to find the most comfortable position for sleeping, sitting, or even eating. The ability to adjust the bed's height also makes it easier for healthcare professionals to provide care and treatment to patients, as they can easily reach the patient without straining their own backs.
Our Hospital beds are equipped with side rails, which provide an added level of safety for patients. These rails help prevent patients from falling out of bed, especially those who are at a higher risk due to their medical condition or mobility issues. The side rails can be easily raised or lowered as needed, providing convenience for both patients and caregivers.
Another advantage of our hospital beds is the presence of specialized mattresses. These mattresses are designed to provide pressure relief and prevent the development of bedsores, which are a common concern for patients who are bedridden or have limited mobility. The mattresses distribute the patient's weight evenly, reducing pressure on specific areas of the body and promoting better blood circulation.
Our Hospital beds also come with features that enhance patient mobility. Many hospital beds have wheels attached to them, allowing easy transportation of patients within the healthcare facility. This mobility feature is particularly useful during medical procedures, transfers between rooms, or when patients need to be moved for cleaning purposes. Additionally, some hospital beds have a feature called Trendelenburg positioning, which allows the bed to be tilted at an angle to facilitate specific medical procedures or provide relief to patients with certain medical conditions.
Furthermore, our hospital beds are equipped with various accessories that further enhance patient comfort and convenience. These accessories can include adjustable overbed Tables, which allow patients to eat, read, or work while in bed. Some hospital beds also have built-in electronic controls that enable patients to adjust the bed's position or call for assistance with the push of a button. These features promote patient independence and reduce the need for constant caregiver support.
In addition to patient benefits, hospital beds also offer advantages for healthcare professionals. The adjustability and mobility features of hospital beds make it easier for healthcare professionals to provide care and treatment to patients. The ability to raise or lower the bed's height, adjust the backrest, or tilt the bed can significantly improve the ergonomics of caregiving, reducing the risk of strain or injury for healthcare professionals.
In conclusion, our hospital beds offer numerous advantages that contribute to the well-being and recovery of patients. The adjustability, safety features, specialized mattresses, and mobility options make hospital beds a crucial component in healthcare facilities. These beds not only provide comfort and support to patients but also enhance the efficiency and effectiveness of healthcare professionals.
1 Thin wood planing process: logs → splitting → cooking → planing → planing → stacking → cutting.
1) Logs: Dabaimu, Aiyousi, Paulownia, ash, etc. After the logs arrive at the factory, they should be peeled and cut off.
2) Splitting: Set the saw according to the requirements of the product. At present, due to the good sales of the straight-grain veneer, the four-point sawing method is generally adopted. If there are many tree shadows required, the number of diameter cutting boards should be guaranteed as much as possible. If it is a mountain, ensure as many strings as possible.
3) Cooking: It is the key section of wood cutting. The temperature is 60-100 °C, and the temperature is raised at 10 °C/h, and the heating time is 30-60 hours. The temperature is too high, the temperature rises too fast, the energy consumption is large, the cracking of the logs is easy to occur, and there is a color difference; the temperature is too low, and the cooking time is too long. The time is too short, the degree of softening inside and outside is different, and the color is inconsistent. The most critical is that due to the different moisture content inside and outside, the wood is bent before cutting, so that the thin wood is reduced or scrapped.
4) Planing surface: remove the pollution caused by cooking on the wooden surface, especially the iron pollution.
5) Slice: The thickness of the thin wood is 0 13 ~ 0 15mm, depending on the wood variety and production process requirements. The thin wood is too thin, fragile and transparent, which increases the difficulty of the veneer section. Thin wood is too thick, which increases the cost and makes dyeing difficult.
6) Code placement: Count and arrange the thin wood in order. In this process, the defects of unqualified thin wood, such as uneven thickness, knots, skin, decay, discoloration, etc. are eliminated.
7) Shearing: Shearing into thin wood strips of 5~16cm width, 6~10cm thin wood is easy to stick, and the finished board has a good grade rate. In addition, defects are further removed during this process.
2 Imitation black walnut thin wood dyeing process dyeing process: thin wood → dyeing solution → dyeing → washing → fixing → code.
1) Thin wood: After careful selection, remove the unqualified thin wood and cage.
2) Dyeing solution: A dye and ratio: dyes suitable for wood dyeing include acid dyes, weak acid dyes, direct dyes, etc., depending on the wood variety, color depth and customer requirements [5]. The basic ratio of the dye is red: dark blue: orange 80:15:5B auxiliary: NaCl, Na2CO3, penetrant, acetic acid, fixing agent, leveling agent, etc., depending on the production demand.
3) Dyeing: A dyeing process parameters: dye concentration 1%, appropriate amount of additives, dyeing temperature 60 ~ 90 ° C, dyeing time 2 ~ 4h. B process [6]: Prepare the dyeing solution in warm water, put the thin wood after the cage into the dyeing tank, compact, and heat to the required temperature at 2 °C/min, keep warm for 2~4h. The dye solution should be kept flowing during this period. C quality standard: the color inside and outside the thin wood is uniform, no obvious color difference, flat. D economic and technical indicators: through dyeing can greatly increase the added value of ordinary thin wood, so that the price of thin wood from 0 13 ~ 0 15mm increased from 0 5 ~ 1 yuan / m2 to 45 yuan / m2, the cost of dyeing treatment is 0 5 yuan / m2 .
4) Washing, fixing, etc.: The purpose is to remove the floating color and increase the binding force of the dye to the wood.
5) Code placement: Count and arrange in order. Remove the thin wood with dye defects. There are vertical and horizontal dyeing cylinders, each with its own advantages and disadvantages. Vertical equipment can be cut first and then dyed, easy to load and unload, the production volume is large, but the dyeing is uneven, the board surface flower. The production capacity of horizontal equipment is slightly smaller, which is inconvenient to load and unload, but the thin wood is easy to be dyed and dyed, and it is mainly dyed and then cut, and it can be cut first and then dyed. The material for the dyeing cylinder should be made of stainless steel. The heating device, the dyeing liquid flow device, the filtering device, the liquid inlet and outlet device, etc. should be considered, and suitable loading cages and lifting facilities should be considered. The main dyeing process is dye selection and color matching. Dyes are selected according to the wood material, product type and customer requirements. The dye type, performance and structure should be as close as possible. Under the condition that the target color is satisfied, the less dyes used, the better. In the dyeing industry production, in order to meet the customer's requirements for color, it is often necessary to mix and match dyes of different colors. This work is called color matching, also known as color matching. The color matching is based on the principle of "subtraction" color mixing. In practical applications, because the ideal three primary colors are not found, red, yellow and blue are often used as substitutes for the three primary colors. Before production, be sure to match the color, first through the laboratory to try to match the color, and then through the large test toning, to meet the requirements before mass production. Color matching is a complicated and meticulous work. In addition to having a keen color discrimination ability and rich practical experience, the color proofing personnel must master the necessary color knowledge. It is best to have a colorist with production experience to work.
3 Artificial board veneer process: substrate treatment → coating concealing agent → drying → coating → veneer → cold pressing → clean side → coarse sand → hot pressing → repair → sanding → classification → packaging.
1) Substrate treatment: check whether the bottom, degumming, glue, and putty are ensured to ensure the flatness of the substrate and not penetrate the bottom. Generally, the appearance of the substrate is controlled according to the requirements of the first grade of the national standard GB13009-91 tropical hardwood standard plywood standard, and the substrate error is within 0 2mm.
2) Applying concealing agent: The concealing agent is filled and covered, and the purpose is to not leak the bottom and reduce the amount of glue used. Commercially available finished products are available, but the color is small. You can also deploy it yourself as needed. Its composition is adhesive, pigment or dye, filler and the like. The color should be close to the color of the attached wood. After the concealing agent is applied, it is dried by a dryer.
3) Gluing: The adhesive used is a well-adjusted adhesive, white glue and color glue. White glue contains adhesive, viscosity-increasing flour, filler, and the like. The color of the color glue should be basically close to the color of the thin wood. In addition to the white glue component, it also contains dyes or pigments, but the pigment should not contain iron ions. White glue is easy to operate and has no pollution to the surface of the board. However, after sanding, the surface of the board is lightened, gray and floating. The color glue makes the color of the board look deep and stable, but the operation is difficult, and the glue that is exposed causes pollution to the board surface. Commonly used adhesives are milk white glue and urea-formaldehyde glue.
4) Veneer: Wet veneering process, using push-paste or digging technology for veneering. The seams of the seams should be neat, and the order of the textures should be separated to ensure that the ones on the board are consistent or consistent.
5) Cold pressing and clean side: usually cold pressing for 3~5h, the purpose is to reduce the hot pressing time and give the initial strength. After cold pressing, clean the edges and cut off the excess thin wood on both sides of the end. Care should be taken when cutting the ends to avoid tearing. Cause unnecessary drops.
6) Hot pressing: depending on the type of rubber, the panel is given enough strength. The top plate of the hot press machine should be equipped with a felt plate and a heat-resistant film.
7) Sanding and repairing: Sanding is divided into coarse sand and fine sand. After cold pressing, the water content of the slab is about 30%. Use 180-240# abrasive belt coarse sand, sanding amount is 0 03mm, remove the surface burrs, dust, stains and lamination. After hot pressing, the veneer should be repaired first; the glue, tear, and seam should be filled or subsidized with thin wood; then the unevenness should be flattened, and finally 80~120# sanding sand can be used to make the surface gloss And the color is well-proportioned.
8) Classification, packaging: According to product color, texture, defects, product inspection and grading. Pack the product according to standard packing conditions or user requirements.
About Our Hospital Bed:
Our Hospital Beds are specially designed beds that are used in healthcare facilities to provide comfort and support to patients during their stay. These beds offer numerous advantages that contribute to the overall well-being and recovery of patients. In this article, we will explore some of the key advantages of hospital beds.
One of the primary advantages of our hospital beds is their adjustability. These beds can be easily adjusted to various positions, allowing patients to find the most comfortable position for sleeping, sitting, or even eating. The ability to adjust the bed's height also makes it easier for healthcare professionals to provide care and treatment to patients, as they can easily reach the patient without straining their own backs.
Our Hospital beds are equipped with side rails, which provide an added level of safety for patients. These rails help prevent patients from falling out of bed, especially those who are at a higher risk due to their medical condition or mobility issues. The side rails can be easily raised or lowered as needed, providing convenience for both patients and caregivers.
Another advantage of our hospital beds is the presence of specialized mattresses. These mattresses are designed to provide pressure relief and prevent the development of bedsores, which are a common concern for patients who are bedridden or have limited mobility. The mattresses distribute the patient's weight evenly, reducing pressure on specific areas of the body and promoting better blood circulation.
Our Hospital beds also come with features that enhance patient mobility. Many hospital beds have wheels attached to them, allowing easy transportation of patients within the healthcare facility. This mobility feature is particularly useful during medical procedures, transfers between rooms, or when patients need to be moved for cleaning purposes. Additionally, some hospital beds have a feature called Trendelenburg positioning, which allows the bed to be tilted at an angle to facilitate specific medical procedures or provide relief to patients with certain medical conditions.
Furthermore, our hospital beds are equipped with various accessories that further enhance patient comfort and convenience. These accessories can include adjustable overbed Tables, which allow patients to eat, read, or work while in bed. Some hospital beds also have built-in electronic controls that enable patients to adjust the bed's position or call for assistance with the push of a button. These features promote patient independence and reduce the need for constant caregiver support.
In addition to patient benefits, hospital beds also offer advantages for healthcare professionals. The adjustability and mobility features of hospital beds make it easier for healthcare professionals to provide care and treatment to patients. The ability to raise or lower the bed's height, adjust the backrest, or tilt the bed can significantly improve the ergonomics of caregiving, reducing the risk of strain or injury for healthcare professionals.
In conclusion, our hospital beds offer numerous advantages that contribute to the well-being and recovery of patients. The adjustability, safety features, specialized mattresses, and mobility options make hospital beds a crucial component in healthcare facilities. These beds not only provide comfort and support to patients but also enhance the efficiency and effectiveness of healthcare professionals.
Hospital Beds,Nursing Bed,Medical Equipment Bed,Hospital Medical Flat Bed
Henan Toda Technology Co., Ltd. , https://www.todafurniture.com