How to extend the service life of student desk and chair sets?

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The school desk chair sets are the desks and chairs used in school during the student period. Generally, they are made of plastic materials, wood, steel, steel, and so on. The school will choose the appropriate desk according to the actual situation. The chair set is used, but there are often some reasons for the damage of the student desk and chair during use, resulting in the short life of the student desk and chair, so is there any way to extend the service life?

1. From the perspective of consumers of student desks and chairs, whether it is high-priced or low-priced, they hope to be able to use them for a longer time and reduce investment in this area. Price is not important, but quality is important. Schools should grasp the procurement access standards for desk and chair sets, the allocation and use standards for desks and chairs, daily hygiene management, and monitoring of the teaching and living environment, and strengthen supervision.

2. Change the one-sided pursuit of the traditional concept of “tidy and uniform, easy to manage” desks and chairs, and improve the scientific cognition of school leaders and teachers on the implementation of national standards and the ergonomic configuration of desks and chairs. In contrast to national standards, each class in all primary and middle schools is adjusted according to the actual height of students sitting, and the mismanagement and use of desks and chairs are rectified. Only good management will naturally last longer.

3. When students use desks and chairs, the school should ask them not to step on them as much as possible. Use sharp objects to scratch the desk, legs and other parts of the desk. Care for the desks and chairs so that the service life will be long.

4. If there are any loose screws in the desks and chairs of the students, please tighten them in time. Avoid the long time, the position of the screw hole becomes large and deformed, which is not easy to repair.

5. Pay attention to maintenance, clean in time during use, and apply a layer of varnish every few years to keep the color fresh and durable.

6. When using student desks and chairs, they should be selected in a place with relatively boring air circulation, away from fire sources or wet walls, to prevent sun exposure. Otherwise, the appearance of the desks and chairs of the desk and chair manufacturers will be prematurely aging, which will affect the service life.

7. When there is dust on the desks and chairs, try not to wipe it with water. If necessary, use a soft cloth to wet it. Do not use alkaline soap, water and detergent to wipe it to prevent affecting the brightness of the paint or causing peeling paint and water. The bottom should be wiped dry in time to avoid rusting when some steel desks and chairs come into contact with water.

8. When cleaning the classroom, you should lift the desks and chairs from the ground for cleaning, reduce the movement of desks and chairs, don’t push and pull hard, prevent the legs from being scattered or damaged, prevent frequent contact with water, and prevent rust.

9. Do not store corrosive solutions such as strong acids and alkalis on the desktop.

10. Regular inspections. The school should regularly inspect the screws and welding parts of the desks and chairs to ensure the safety of the desks and chairs, so as to ensure the service life.

The above is the whole content of how to extend the service life of student desks and chairs. In fact, if you want to extend the service life of student desks and chairs, do a good job of inspection and maintenance, pay attention to the use environment, timely cleaning and maintenance, and in the process of use. It is very important to pay attention to protection, etc., so that the service life can be long.

Detailed explanation of the size standard and row spacing standard for students lifting desks and chairs

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There are various types of student lift desks and chairs on the market, with different prices, quality, and sizes. When we choose, we put aside other things. The most important thing is to choose the right size. So how should we choose the size? The following table and chair manufacturers of lifting desks and chairs will introduce the size standards and row spacing standards of student lifting desks and chairs for your reference.

The size standard of lifting desks and chairs

1. Desktop: desktop length is 600mm, desktop width is 400mm, desktop thickness is 16mm, multi-layer board injection molding edge sealing without joints, edge sealing and integrated pen slot, green and odorless, meet the requirements of relevant standards, desktop It is directly fixed with the table frame with blind rivets, and is padded with aluminum gaskets to prevent pulling through.

2. Table bucket: The length is 500mm, the width is 320mm, the height is 150mm, and the thickness is 0.8mm. The cold-rolled plate is stamped and formed at one time.

3. Table legs: The length of the iron plate of the column is 650mmX width 12mm, the thickness is 1.5mm, the foot is 50mmX25mm, and the thickness is 1.2mm.

4. Connection: The beam is connected with a φ38 round tube with a wall thickness of 1.3mm.

5. Foot set: It is made of PP engineering plastics and is formed by blister. The size is 60mm X 50mm, and the landing is 10mm. The feet are fixed by aluminum rivets, which are stable on the ground, prevent falling off, and are sturdy and durable.

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The size standard of lifting desks and chairs

1. The total height of the chair is 780mm, and the height from the chair surface to the ground is 450mm.

2. The size of the chair surface is 380mmX 370mm, the thickness is 12mm, and the multi-layer board is injection-sealed without joints, and the backrest size is 370mmX 190mm, the thickness is 12mm, and the multi-layer board is injection-sealed without joints. It requires green and no peculiar smell, and meets the requirements of relevant standards. The front edge of the chair has a downward curve, and the backrest has a horizontally curved fox.

3. The length of the iron plate of the chair column is 360mmX 12mm, the thickness is 1.5mm, the foot is 50mm X 25mm square steel, the thickness is 1.2mm, the backrest is 20mm X20mm, the square tube thickness is 1.2mm, and the CNC pipe bending equipment is formed at one time.

4. Crossbeam: The chair is connected by a φ38 round tube, the wall thickness of the tube is 1.3mm, the corners are made of PP engineering plastics, and the size is 60mm X 50mm, the floor is 10mm, and the feet are made of aluminum rivets. Fixed, stable landing, preventing falling off, sturdy and durable.

The standard for the row spacing of lifting desks and chairs

1. The row spacing of lifting desks and chairs in primary schools should not be less than 850mm, middle schools should not be less than 900mm, and the width of the longitudinal aisle should not be less than 550mm. The net distance between the end of the desk and the wall or the inner wall column protruding from the wall and the equipment pipe should not be less than 120mm.

2. The horizontal viewing angle formed by the students on both sides of the front row and the far end of the blackboard should not be less than 30°.

3. The horizontal distance between the front edge of a row of desks in the classroom and the blackboard should not be less than 2000mm, and the horizontal distance between the back edge of the classroom desk and the blackboard: primary school should not be greater than 8000mm, middle school should not be greater than 8500mm. A horizontal walkway no less than 600mm should be arranged at the rear of the classroom.

The above is a detailed explanation of the size standards and row spacing standards for students’ lifting desks and chairs. The size standards and row spacing standards for lifting desks and chairs are all to increase the comfort of students and improve learning efficiency.

How to remove the peculiar smell of plastic steel desks and chairs?

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Desks and chairs are the basic facilities of a school. If a school does not have desks and chairs, then students cannot study. Therefore, desks and chairs are very important, because the society now compares students’ study life and school facilities. Pay attention to it, so now the school’s infrastructure is relatively good, and it will be replaced regularly, and the school will even be renovated. These are relatively common, especially when the desks and chairs are inappropriate or are damaged. They will be replaced, but the new desks and chairs will have some smell. Whether it is plastic steel desks and chairs or wooden desks and chairs, there will be peculiar smells, so how do we remove these peculiar smells?

1. Natural ventilation

This method is to put the desks and chairs in a ventilated place, and use the flow of air to take away the peculiar smell of the plastic steel desks and chairs or the harmful substances such as formaldehyde. However, this method is relatively time-consuming and takes a long time to achieve expectations effect.

2. Vinegar and ventilation

Find a container with water and pour an appropriate amount of white vinegar, and then place it on the desks and chairs. The container is filled with cold water. This will not only protect the coating surface of the wall from the evaporation of water, but also absorb and eliminate the remaining desks and chairs. Peculiar smell.

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3. Deodorant cleaner

Under normal circumstances, deodorant cleaners can remove harmful gases emitted from newly decorated houses and new furniture. It is reported that these deodorant cleaners are generally imported products, which use ammonia compounds to chemically react with harmful substances, thus playing a role of deodorizing and cleaning. You can pour this deodorant cleaner into the dish, place the dish next to the desks and chairs, and combine with the scrubbing method to effectively remove irritating odors or formaldehyde odors after a few days.

4. Plant removal method

In our lives, many green plants can effectively adsorb formaldehyde in the air, and play a role in removing formaldehyde or peculiar smell. For example: Phnom Penh Chlorophytum, Tiger Pilan, Lupin, Aloe Vera, Evergreen Teng and so on. Placing a few pots of these plants in the classroom can not only remove the smell of formaldehyde from the desks and chairs, but also make our classrooms full of green vitality, which is a good way to kill two birds with one stone.

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5. Deodorizing method of pineapple

The way to deodorize pineapple is to put a few pineapples next to each set of desks and chairs, and put more on large desks and chairs. Because pineapple is a crude fiber fruit, it can not only absorb the formaldehyde smell of the desks and chairs, but also distribute the pineapple’s refreshing fragrance, speeding up the removal of peculiar smell, which has the best of both worlds, but the cost is a bit high and it is not practical.

6. Air purifier method

Air purifiers are also called “air cleaners”, which can absorb, decompose or transform various air pollutants, generally including dust, pollen, peculiar smell, formaldehyde and other decoration pollution, bacteria, allergens, etc., which can effectively improve air cleanliness degree.

7. Activated carbon method

Activated carbon is a kind of porous carbonaceous material. It has a highly developed pore structure. The porous structure of activated carbon provides it with a large amount of surface area and can fully contact with gas (impurities), thus giving activated carbon its unique adsorption performance. Make it very easy to achieve the purpose of absorbing formaldehyde. So as to achieve the effect of removing the formaldehyde smell of the desks and chairs. Activated carbon can also adsorb benzene, toluene, xylene, ethanol, ether, kerosene, gasoline, styrene, vinyl chloride and other substances.

The above is the whole content of how to remove the odor of plastic steel desks and chairs. In fact, if you want to remove it, the simpler method is to use the window ventilation method, but this kind of treatment is suitable for the winter and summer vacations in school. If it is urgently needed, it is still The effect of using an air purifier and ventilation treatment will be better. That’s all for the sharing of the editor of Ute today. If you have any questions or needs, you can leave a message or call for consultation. Ute welcomes your consultation and message!

How to judge the quality of student desks and chairs?

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We often say that students are the flowers of our motherland. We need to take care of the flowers of our motherland so that they can grow up healthily. We also often say that a strong young man makes a strong country. So how can young people be stronger?

To put it simply, you need to study hard, but the learning environment is poor, and you can’t study normally and calmly. These will all affect. However, in addition to the canteen and accommodation environment in the school’s study life, the classrooms also have large desks and chairs. Impacted. A good set of desks and chairs can allow children to grow up healthy and happily learn. However, if the quality of desks and chairs is poor, it will cause problems for the physical and mental development of students. How to distinguish the quality of student desks and chairs for students? What determines the quality of student desks and chairs?

1. Use material thickness and weight

The simple way to see the quality of desks and chairs is to compare the weight of the steel part, because the thickness of the steel is related to the price and cost. In addition, the thickness of the steel directly affects the quality of use and production of the desks and chairs, because if the material steel is too thin, it will be too thin and it will be easy to leak the result after heating, which will cause light to move, heavy If the plastic material is too thin, it is more likely to cause cracking when it is bumped during use. Therefore, the thickness and weight of the material used are very important.

2. The production process of desks and chairs

Secondly, the production process is also very important, and it is also very important for the quality of desks and chairs. The rationality and balance of the process are important standards for testing the quality of desks and chairs. The main reason is that the production process of student desks and chairs can directly affect the experience and service life of student desks and chairs. Therefore, the process requirements for student desks and chairs need to be higher to ensure that the structure of student desks and chairs is stable and firm. Its surface is smooth and burr-free, and there is no false welding phenomenon, so that students will not be in danger when using student desks and chairs, and create a good learning environment for students.

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3. The design should be humanized

In addition, the quality of quality is closely related to the design, and the quality of the design will also affect the quality, because the students use the desks and chairs for a long time. If the design is unreasonable, the students will use it for a long time. You will feel very tired. It will not only affect the students’ learning status, but also seriously affect the students’ health. Therefore, the design of student desks and chairs must conform to scientific principles such as ergonomics and a better perspective. Ensure that students maintain the correct learning posture, prevent the occurrence of diseases such as myopia and hunchback, so that students can learn healthy and happy.

4. Ensure safety and environmental protection

The quality and safety of desks and chairs are inseparable. In addition, the materials of desks and chairs are now more diverse. Paint or spray paint, as well as some glue and plastics, are also used in the production. Products are more or less containing certain hazardous substances. When students use it, they must have a good quality desk and chair, otherwise it will affect the health and development of students, so whether the materials of desks and chairs are safe and environmentally friendly is also It belongs to the quality category. Only by ensuring that the desks and chairs are sufficiently safe and environmentally friendly can students be assured of putting them into use.

5. Is the price reasonable

In fact, the quality of quality can also be reflected in the price to a certain extent. The low-priced products are relatively different from the high-priced products. Generally, the materials used are different, and at the same time, the workmanship or the use of There is a gap in the quantity of materials, so the prices of desks and chairs will naturally vary, but we still need to look at the specific conditions of the desks and chairs when we buy, whether the price is reasonable and whether the price is in line with the quality. In addition, we have to know an old saying: “Cheap is not good, good goods are not cheap”, so to a large extent, high-priced products generally have better quality.

The above is how to judge the quality of student desks and chairs. In fact, the quality of the desks and chairs is very important to students, because a set of desks and chairs that are qualified in quality and suitable for students’ use is important to the healthy growth of students. Very important, so we must pay more attention to the quality of student desks and chairs when purchasing.

Installation method and precautions of row chairs in lecture classroom

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Under normal circumstances, most row chairs are composed of four parts: the seat, the back, the armrest and the standing leg. Row chairs can make better use of space and allow more people to sit on the chairs. Especially in schools, where the number of students is relatively large, the use of row chairs can effectively solve the situation that some students do not have chairs to sit on. How to proceed with the installation of the row chairs? For the installation method of row chairs in the lecture hall, let us follow the school office furniture manufacturer Aoyang Business and take a look.

 Installation method of row chairs in lecture classroom

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1. Measure the size of the classroom

The customer first measures the size of the lecture hall, and calculates the placement of the desks and chairs according to the size of the lecture hall measured by the customer. It is possible to calculate how many positions of the lecture hall need to be installed, and to design a preliminary installation design drawing.

2. Measure the height of the steps

Then you need to estimate the height of the ladder according to the lecture hall. If you need to make a ladder, you need to add 15cm to the original ground, and so on. Design the distance between the front and back of the desks and chairs in the amphitheatre according to the requirements of the desks and chairs in the amphitheater, generally set to 90cm.

3. Install in order

When installing the row chairs in the lecture hall, there are reasons for the steps. We have to install the rows one by one. First, install the front seats, install the middle seats, and then the rear seats. installation.

When installing the row chair, first make sure that all parts and parts are complete. Then follow the installation instructions and put the parts in the bag for easy installation. Prepare installation tools, drill manually (easy to install screws), or spread paper or sponge on the floor. Do not scrape stainless steel, steel, etc. Install the rails, foot pads, armrests, seat panels, back panels, etc. in sequence according to the above installation sequence. You can ask Xinke Education Enterprise to provide the installation video of this model. Then the video is installed step by step. After reading the installation method of row chairs in the lecture hall, let’s take a look at the places that need attention.

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4. Installation steps

① Install the auditorium chair cushion;

②Install the aluminum bracket and guard plate;

③Install writing board and handrails;

④ Install back connection and backrest;

⑤Install the back plastic shell of the auditorium;

⑥Adjust the size and debugging of the auditorium chair.

Precautions for installation of row chairs in lecture classrooms

1. The horizontal viewing angle formed by the students in the front row and the far end of the blackboard should not be less than 30°.

2. The seat row spacing should not be less than 800mm for primary schools, and should not be less than 850mm for middle schools, middle schools and kindergarten teachers.

3. The width of the walkway The clear width of the vertical and horizontal walkways should not be less than 900mm; when there are both middle and wall longitudinal walkways, the width of the longitudinal walkway against the wall should not be less than 550mm.

4. The seat width should not be less than 450~500mm.

5. The desks and chairs in the classroom should be fixed, and the desk chairs should be flip-flop chairs.

The above is the installation method of the row chairs in the lecture hall. When installing the row chairs indoors, you must measure the indoor area to ensure that the installation construction drawings are correct and then install the indoor row chairs to avoid insufficient space during the installation process.

There are six differences between the student apartment bed and the bunk bed!

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There are beds in student dormitories, so that students’ accommodation and rest needs can be met. At the same time, in the school’s accommodation environment, there are usually bunk beds or apartment beds. Of course, the name is also varied, no matter it is an apartment bed. Still bunk beds, student apartment beds, bunk beds, etc. all mean the same thing, but are they the same? Is there any difference between them? Let’s follow the school office furniture manufacturer Aoyang Trading to have a look!

1. Different structural design and appearance

The design of the apartment pays more attention to comfort, convenience and safety, and the design of the upper and lower beds is relatively simple. While satisfying the safety, it ensures the normal use and rest function. In addition, the structure is generally called The apartment bed often refers to the multifunctional combined apartment bed with the upper bed and the lower table, which is often used in university dormitories. The upper and lower bunk beds are beds above and below, without tables and cabinets. These bunk beds are mostly used in dormitories that need to save more space, so that with the same area, the upper and lower beds can be used by several students.

2. Different use occasions

The apartment bed is a combination bed with upper bed and lower table. It is a multifunctional combined apartment bed with upper bed, lower desk and wardrobe. This kind of bed has higher privacy and can accommodate more personal items, so it can be brought to students It is more comfortable and beautiful, so it will be more popular than getting on and off the bed. This is generally used in universities and higher-level colleges. Of course, it will also be used in some staff dormitories. In addition, the use of bunk beds is more common. It is generally suitable for small venues but more people, or limited budget, but most people will choose to use it. Get in and out of the bed, which saves money.

3. The price is different

The price of an apartment bed is different from the price of a bunk bed. Under normal circumstances, the price of a bunk bed may be around a few hundred yuan, but the price of an apartment bed may range from thousands to thousands of yuan, so The prices of the two are very different, and the purchase decision is made according to the needs and the budget when choosing.

4. Different functions

The use of bunk beds is often out of saving dormitory space, or because of limited budget, and the same floor space can accommodate one more student. However, the use of apartment beds is often to give students a certain degree of privacy and improvement of comfort, while also improving the beauty of the dormitory and improving the comfort of living. Therefore, the purpose of the two is the same to meet the needs of students for rest. But in terms of function, getting on and off the bed is relatively scarce, because the apartment bed can not only meet the needs of rest, but also can store and place sundries, and at the same time give students some small space of their own.

5. Different sizes

The apartment bed is a multifunctional bed, including dormitory furniture such as: bookshelves, desks, wardrobes, lockers and other daily furniture, you can study or work. The general size of the apartment bed is 1980mm*980mm*2100mm. The upper and lower bed is a bed for two people to rest, making full use of limited space and low cost. It has a wide range of applications such as schools, factories, companies and other dormitories. , Size 1980mm*980mm*1800mm.

6. Different options

The design and production of apartment beds are now more and more humane, and they are more and more comfortable when used. While satisfying the use of rest and use, the designs of desks, chairs and cabinets are becoming more and more diversified and more convenient, and at the same time color matching There are more and more styles, and the upper and lower beds are relatively simple, only the upper and lower beds and the protective fence, and no other features. Although the colors are also changeable, there are still fewer options.

From the above content, there are still many differences between student apartment beds and bunk beds. Although they are all used for rest, they have greater aesthetics, comfort, and functionality in the design and structure. There is a gap, so you still need to choose according to your own needs when purchasing. If the budget is enough and the space is large enough, you can choose the apartment bed, but if the budget is small and the space is small, you can choose to get on and off the bed. .

What are the rust removal processes for steel and wood desks and chairs?

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School desks and chairs have various types and specifications. Steel-wood desks and chairs are commonly used. In order to extend the service life of steel-wood desks and chairs, the steel surface needs to be pickled and phosphated during the production process. This process can make the surface of the steel tabletop smooth and play the role of rust removal and rust prevention. The following steel-wood desk and chair manufacturers will introduce to you the steel-wood desk and chair rust removal process!

Pickling and rust removal process

The method of pickling to remove rust and scale is a more widely used method in the industrial field. Utilize acid to dissolve oxides and mechanically peel off hydrogen generated by corrosion to achieve the purpose of removing rust and scale. The more common ones used in pickling are hydrochloric acid, sulfuric acid, phosphoric acid, and mixed acids. Nitric acid is rarely used because it produces toxic nitrogen dioxide gas during pickling.

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1. Hydrochloric acid

Hydrochloric acid pickling is suitable for use at low temperatures, should not exceed 45°C, and use a concentration of 10% to 45%. It is also advisable to add an appropriate amount of acid mist inhibitor.

2. Sulfuric acid

The pickling speed of sulfuric acid at low temperature is very slow, so it should be used at medium temperature, the temperature is 50~-80°C, and the use concentration is 10%~25%.

3. Phosphoric acid

The advantage of phosphoric acid pickling is that it will not produce corrosive residues (more or less there will be some residues after pickling with hydrochloric acid and sulfuric acid), and it is relatively safe. The general use concentration is 10%~40%, and the treatment temperature can be from room temperature to 80°C.

4. Mixed acid

In the pickling process, the use of mixed acids is also a very effective method, such as hydrochloric acid-sulfuric acid mixed acid, phosphoric acid-citric acid mixed acid.

5. Corrosion inhibitor

A proper amount of corrosion inhibitor must be added to the pickling and rust removal and scale removal bath solution. There are many types of corrosion inhibitors, and it is relatively easy to select. Its function is to inhibit metal corrosion and prevent “hydrogen embrittlement”. But when pickling “hydrogen embrittlement” sensitive workpieces, the choice of corrosion inhibitors should be particularly careful, because some corrosion inhibitors inhibit the reaction of two hydrogen atoms into hydrogen molecules, namely: 2[H]→H2↑, so The increase in the concentration of hydrogen atoms on the surface of the metal enhances the tendency of “hydrogen embrittlement”. Therefore, it is necessary to consult the relevant corrosion data manual, or do a “hydrogen embrittlement” test to avoid the use of dangerous corrosion inhibitors.

Anti-rust and phosphating process

The early application of the phosphating process is rust prevention. The steel parts are phosphated to form a layer of phosphating film to prevent rust. The anti-rust period of the phosphate anti-rust treatment work piece can reach several months or even several years (for oil-coated work piece), it is widely used for anti-rust and anti-rust phosphating during the process, transportation, packaging, storage and use. There are three main types of iron-based phosphating, zinc-based phosphating, and manganese-based phosphating:

1. Iron-based phosphating

The main bath composition of iron-based phosphating is ferrous phosphate solution, which does not contain oxidation promoters and has high free acidity. The iron-based phosphating treatment temperature is higher than 95°C, the treatment time is more than 30 minutes, the phosphating film is more than 10g/m2, and it has the dual functions of rust removal and phosphating. This high-temperature iron-based phosphating rate is too slow, so it is rarely used now.

2. Zinc-based phosphating

Zinc-based phosphating is also a widely used anti-rust phosphating, usually nitrate is used as an accelerator, the treatment temperature is 80~90°C, the treatment time is 10~15min, the phosphating film is more than 7.5g/m2, the phosphating film The microstructure is generally a densely packed needle piece.

3. Manganese phosphating

Manganese-based phosphating has better performance for anti-rust and phosphating. The microstructure of the phosphating film is densely packed and is a widely used anti-rust and phosphating. It can be added with or without accelerator. If nitrate or nitroguanidine accelerator is added, the speed of phosphating film formation can be accelerated. Usually the treatment temperature is 80~100°C, the treatment time is 10~20min, and the film weight is above 7.5 g/m2.

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Adjust the activation process

The workpiece treated with strong alkali and strong acid will cause the phosphating film to be coarsened, and the surface adjustment activation can refine the crystal grains:

1. Iron-based phosphating generally does not require adjustment of activation treatment.

2. Zinc-based phosphating can be adjusted with oxalic acid and colloidal titanium.

3. Manganese phosphating can be activated with insoluble manganese phosphate suspension.

After phosphating, the chromate sealing of the workpiece can greatly improve the rust resistance. If it is oiled or dyed, the rust resistance can be increased by several or even dozens of times.
The above is the entire content of the rust removal process for steel and wood desks and chairs. In summary, the rust removal process for steel and wood desks and chairs includes pickling and rust removal, rust prevention and phosphating, adjustment and activation, etc. Henan Youte School Equipment Co., Ltd. The steel-wood desks and chairs produced are of excellent quality, advanced technology, and perfect after-sales service. If you have any needs, you can call or leave a message for consultation at any time.

Steel-wood desks and chairs electrostatic spraying process and principles and advantages

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Steel-wood desks and chairs are student desks and chairs with wood as the layout substrate and steel as the skeleton substrate. The more characteristic process is the electrostatic spraying process, which is easy to operate, environmentally friendly, and does not pollute the environment. For example, the painting process will cause the phenomenon of flow, so it has become a commonly used desk and chair for students in modern times. The following desk and chair manufacturers will introduce to you the electrostatic spraying process, process principles and advantages of steel and wood desks and chairs!

1. Electrostatic spraying process of steel and wood desks and chairs

1. Surface pretreatment: mainly degreasing and rust removal, the method is the same as the pretreatment of applying liquid paint.

2. Scrape putty (repair defective products): Scrape conductive putty according to the degree of defects of the workpiece, and smooth it with sandpaper after drying, and then proceed to the next process.

3. Protection (also known as masking): If some parts of the workpiece are not required to be coated, they can be covered with protective glue before preheating to avoid spraying paint.

4. Preheating (thick coating): Generally, preheating is not required. If the coating is required to be thicker, the workpiece can be preheated to 180~20°C, which can increase the thickness of the coating.

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5. Spraying: In a high-voltage electrostatic field, connect the powder spray gun to the negative electrode, and the workpiece is grounded (positive electrode) to form a loop. The powder is sprayed from the spray gun with the help of compressed air, which is negatively charged, and is sprayed on the workpiece according to the principle of opposite sex attraction.

6. Curing: After spraying, the workpiece is sent to a drying room at 180~200°C for heating to solidify the powder.

7. Cleaning: After the coating is cured, remove the protective material and smooth the burrs.

8. Inspection (respray for defective products): Check the coating of the workpiece. Any defect such as missing spray, bumps, needle bubbles, etc., needs to be reworked and resprayed.

Second, the principle of electrostatic spraying of steel and wood desks and chairs

The electrostatic spraying of powder coatings is called plastic spraying, and its principle is to use the phenomenon of corona discharge to make the powder coatings adsorb on the workpiece. The process is: the powder coating is sent to the spray gun by the powder supply system by compressed air gas, and the high voltage generated by the high-voltage electrostatic generator is added to the front of the spray gun. Due to corona discharge, dense electric charges are generated nearby. The powder is sprayed by the gun nozzle. When it exits, it forms charged paint particles, which are attracted to the workpiece with the opposite level of electrostatic force. As the sprayed powder increases, the electric charge accumulates. When it reaches a certain thickness, static electricity is generated. Repulsion does not continue to absorb, so that the entire workpiece obtains a certain thickness of powder coating, and then the powder is melted, leveled, and solidified by heat, that is, a hard coating film is formed on the surface of the workpiece.

Three, steel and wood desks and chairs electrostatic spraying advantages

1. Compared with the traditional spray painting process, electrostatic spraying has significant advantages. It does not need thinner materials, and the construction is non-polluting to the environment and harmless to the human body;

2. The coating has excellent appearance quality, strong adhesion and mechanical strength;

3. The curing time of spraying construction is short, the corrosion resistance and wear resistance of the coating are much higher, and no primer is required;

4. The construction is simple, and the technical requirements for workers are low. Some construction occasions have clearly stated that electrostatic spraying technology must be used;

5. The cost is lower than the painting process, and the flow phenomenon common in the painting process will not appear during the electrostatic powder spraying process.

The above is a detailed introduction to the electrostatic spraying process, process principles and advantages of steel-wood desks and chairs. The electrostatic spraying process of steel-wood desks and chairs is surface pretreatment, scraping putty, protection, preheating, spraying, curing, and cleaning. , Inspection and other steps, the principle is to use the phenomenon of corona discharge to make the powder coating adsorb on the workpiece. This process has the advantages of green pollution-free, simple construction, and short curing time.

How to install the auditorium soft chair? Installation steps method introduction

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Auditorium chairs are a very common seat in our lives. They are often used in meeting rooms, auditoriums, etc., and even seats in many public areas now use auditorium chairs. More and more people like the auditorium chair. There must be something unique and something worthy of appreciation. Although the types of auditorium chairs are different, the installation methods are still the same. In fact, the introduction to the installation steps of the auditorium chair is still very detailed. As long as we can install it correctly and do a basic test, it will also be beneficial to the long-term application of the auditorium chair. Today, I will introduce how to install the auditorium soft chair and how to install it.

The installation process of the auditorium soft chair is a work with a certain technical content; after the parts of the seat are sent to the installation site, first check whether the parts are complete. The large parts include the chair frame, cushion, backrest, etc., while some small parts are included. The components are the key to the installation. Whether the screws are the size required for the installation is also very important whether the site is a wooden floor or a concrete floor; therefore, on-site installation is also a tedious and technically difficult task.

Multimedia classroom soft chair

1. Install the seat

We need to use screws to install the relevant seats and do points, and then install the armrests on both sides, we must ensure the stability of the installation of the armrests. Because many of the chairs in movie theaters are row-by-row, but have separate armrests, fixing work must be done well.

2. Install the bracket and guard plate

The installation of the bracket and the guard plate in the installation steps of the auditorium chair are very critical, so special attention must be paid to the fixing work. You need to install the bracket on the armrest frame, then you need to use suitable plastic nails to fix it, and then insert the guard plates of the two armrest frames.

3. The backrest link

After completing the other parts of the link, you need to determine the link of the backrest position, and also need to have the anti-skid position fixed. Because the fixed position of each auditorium chair is different, the screws used are also different, so be sure to fix the position of the backrest.

Auditorium chair

4. Fixed on the ground

Because of the different types of auditorium chairs we choose, there will be some differences in the installation steps of the auditorium chairs. Therefore, we must pay special attention to the fixed position. Generally, the position of the tripod can be specified first, or after the assembly of the auditorium chair is completed, the fixing can be carried out, so that a good application effect can be guaranteed, and the fixing can be determined. The stability.

5. Adjust the size and adjustment of the auditorium chair

(1) Test the size of the auditorium chair and repair it, and check whether all of it is tight.

(2) Use 8*55mm screws to fix the foot cover to the ground, and then cover the blind cover.

The above is an explanation of the steps for the installation of the auditorium chair. What needs to be reminded is that in the installation process, in addition to measuring the installation site, drawing lines and punching holes, it also needs the ability to adapt to changes, such as the wooden floor used on the site. The thickness is too thin, should you consider changing to another type of screw, etc.