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Some users of seamless stainless steel tubing need to bend it into a U-shape. If they do so according to standard practice, they must have specific mechanical tools to do so, otherwise it is unlikely that they will get good bending results. Before starting work, it is important to understand the basics of stainless steel seamless tubes. For example, it is necessary to understand the relationship between the dimensions of the seamless stainless steel tube and the loading method.

Assume that there are three cases: 1. the diameter of the round pipe is equal to the side length of the square pipe, and the wall thickness is the same; 2. both pipes are simply supported; 3. the loading pattern is a transverse concentration of force at the midpoint. The extreme moment of inertia of the round pipe is smaller, which will lead to large deflection of the round pipe and larger bending deformation of the round pipe. It is worth thinking how to deal with this situation. If a plain stainless steel seamless tube is bent without mechanical assistance, a similar soil method will be used: the stainless steel seamless tube is filled with sand and then bent.

Honestly, if the stainless steel seamless tube is very thin and without mechanical assistance, the probability of success is really small. Customers are advised to go to a stainless steel industrial seamless tube manufacturer for processing. Usually, stainless steel seamless tube manufacturers have these machines, or they can buy the finished product directly from the manufacturer. The price should be about the same. The standard mechanical collaboration stainless steel seamless tube bending method can be referred to the following practices: 1. If not required, both sides should be concave inward to avoid cracking of the stainless steel seamless tube; if the surface of the stainless steel seamless tube is required not to be concave, it can be ensured by the core plugging method; the raw material of the stainless steel seamless tube should be qualified; the inside of the stainless steel seamless tube is concave, which means there is a protrusion in the middle of the mold on the inside of the bending machine. When bending, a recess can be pressed on the inside of the stainless steel seamless tube.

Medical consumables refer to medical materials used in the process of treating patients. According to specific purposes, medical consumables can be divided into vascular interventions, orthopedic consumables, neurosurgical consumables, non-vascular interventions, stomatological consumables, blood purification consumables, ophthalmic consumables, electrophysiological consumables, medical hygiene materials, injection and puncture consumables, medical sterilization consumables, anesthesia consumables, operating room consumables, medical technology consumables, etc. From the value point of view, medical consumables can be divided into high-value medical consumables and low-value medical consumables. Medical consumables can be divided into high-value medical consumables and low-value medical consumables, where low-value medical consumables refer to disposable medical materials of low value, such as gauze, swabs, gloves, syringes, etc., which are commonly used in clinical multidisciplinary.

With the development of medical and health care, the importance of medical consumables in medical services has been gradually increased. As medical consumables commonly used in clinical multidiscipline, low-value medical consumables can help improve the safety of examination and treatment and prevent the spread of diseases caused by the sharing of medical devices between doctors and patients, so they have developed rapidly in recent years.

According to the estimation of Medical Instrument Research Institute, the market share of injection and puncture consumables in the low-value medical consumables market is 30%, followed by medical sanitary materials and dressings with a market share of 22%, and the top five areas of market share are injection and puncture, medical sanitary materials and dressings, medical polymer materials, medical technology consumables and medical sterilization.

Over the years, thanks to the continuous reform and opening up, with the low labor cost and the rapid development of technology, China’s low-value consumables industry has developed rapidly, and a large number of excellent well-known brands have emerged, such as Weigao, Double Pigeon, Conrad, Lanfan Medical, Sanxin Medical, Jiangxi Hongda and so on. Domestic products not only occupy most of the domestic market share, but also occupy a pivotal position in the international market. Although the development trend of domestic products is promising, but limited by the material technology and process level restrictions, in the high-end low-value medical supplies market is still dominated by imported products for the time being.

When using molded silicone to produce silicone products, the silicone products produced by low hardness silicone sometimes have cracked edges.

Edge cracking of silicone products

A, low hardness (about 30 degrees) of the rubber in the molding is easy to appear package wind (bubbles) and other bad, if the silicone body color or translucent color is also easy to see many small white dots inside the silicone products.

Solution.

The method of increasing the mold temperature, the molding of the mold temperature to increase appropriately.

Second, when the mold temperature is increased, the package wind (bubbles) and white spots bad solution, but the edge of the silicone products began to crumble, that is, the emergence of burst edge. This forms a dead-end cycle, raise the mold temperature on the burst edge, lower the mold temperature on the wind (bubble) and white spot bad.

Solutions.

1. reduce the molding mold temperature, if the wind (bubbles) and white spots appear to extend the vulcanization time. Molding temperature must be fierce down until the silicone products do not burst the edge, do not think that a drop of four or five degrees of mold temperature can be solved.
2. exhaust stroke and the number of times must be controlled, exhaust as few times as possible, if possible, exhaust stroke will also try to shorten.
3. can be appropriate to reduce the amount of vulcanizing agent added.

Third, silicone products molding mold since the removal of the knife is too sharp or the existence of burrs.

Generally speaking, silica gel with hardness around 20 degrees is suitable for small products and fine pattern products, usually the size of these products is below 1 meter, because this type of silica gel has: small viscosity, good fluidity, good operation, easy to drain bubbles, good tensile strength, easy to fill. For large size products, usually above 1 meter in size, the hardness of the mold silicone is relatively large.

Silicone products are difficult to exhaust and shrink the edge of the cracking phenomenon

Silicone products edge (edge skin) part of the cracking, pulling the edge, shrinkage of such a phenomenon, the industry called this phenomenon for scorched edge; according to years of experience in the production of silicone products for the general scorched edge situation, that there are mainly four reasons caused by.

1. The vulcanizing agent content in the rubber is too large (that is, the vulcanizing agent added more);
2. Vulcanization time is too long;
3. The vulcanization temperature is too high;
4. The vulcanization pressure of the vulcanization instrument is too large.

There are 4 reasons for the problem of difficult exhaust of silicone products:

1. The exhaust distance is too large or too short, which should be strictly controlled between 1 – 5cm;
2. One exhaust is not exhausted, the second exhaust can be carried out to solve;
3. Not to the vulcanization time;
4. The rubber material has problems, there is moisture / vulcanizing agent dispersion is not uniform / rubber mixing is not uniform.

Silicone products exhaust difficult and shrinkage edge cracking is generally in the mold at the surface, to solve these problems, other details should also pay attention to the following

1. The amount of material should also be noted;
2. There is also the mold of the mold edge is not damaged, if necessary, to use oil stone polishing;
3. Will there be scratch when demoulding? In the place that will be scratched to pour a little R angle;
4. whether the use of poor quality silicone also has a certain relationship.

In short, different silicone products will have different problems, according to their own requirements, process, temperature vulcanization time pressure and so on how much to adjust the test

Rock wool insulation can prevent rodents. The efficiency and superiority of rock wool are attributed to a variety of reasons related to its composition. However, you can also choose many different feasible materials, such as polyurethane foam, rock wool and even cellulose. This makes dyeing more environmentally friendly than wool, because a dye can be directly made into 8-color rock wool. Rock wool growth block: Rock wool growth block is a full-size rising medium for transplanting larger seedlings, and some small leaves and roots appear from the starting cube.

if a rock wool insulator is left to get wet

Quite the contrary, if a rock wool insulator is left to get wet, it will retain a lot of moisture and thus become a breeding ground for microorganisms, which is generally somewhat dangerous. Cellulose is an especially easy-to-use insulation that can be simply blown into any type of attached garage space. These materials are made with incredible ingredients consisting of fibers and particulates that may be scientifically proven to be carcinogenic.

mineral wool products may cause short-term pores

Due to the mechanical effect of fiber, mineral wool products may cause short-term pores and skin itching. Rock wool was originally an insulating material, mainly used in the construction industry. Rock wool insulation can be identified by the names of mineral wool insulation, slag wool insulation and even rock wool insulation. More than 95% of greenhouse vegetable production is carried out with the help of rock wool – which is well justified. Another specialty is the direct availability of rock wool products of various sizes and shapes.

amorphous super-temperature mineral wool is installed and used in high temperature applications

When amorphous super-temperature mineral wool is installed and used in high temperature applications such as industrial furnaces, at least one surface may be exposed to conditions that partially devitrify the fibers. Rock wool is produced in sizes ranging from 1.5″x1.5″x1.5″ to 6″x6″x6″, each size is in the middle, and the board is 3 feet long and 6″ wide. In 1897, American chemical engineer Charles · Charles Corydon Corridor developed a technique for converting fused limestone into fibers and started the rock wool insulation business in the United States.

1, the use of laser cutting machine: what is the scope of application of laser cutting machine?
Metal fiber laser cutting machine is used in sheet metal processing, aviation, aerospace, electronics, electrical appliances, subway accessories, automotive, food machinery, textile machinery, engineering machinery, precision parts, ships, metallurgical equipment, elevators, household appliances, crafts and gifts, tool processing, decoration, advertising, metal outside processing, kitchenware processing and other manufacturing and processing industries. Stainless steel, carbon steel, alloy steel, silicon steel, spring steel, aluminum, aluminum alloy, galvanized plate, galvanized plate, pickled plate, copper, titanium and other metal plates and tubes cutting.

2, the use of laser cutting machine: what is the principle of laser cutting? What is the use?
The principle of laser cutting is to use a high power density laser beam to scan the surface of the material, in a very short period of time the material is heated to thousands to tens of thousands of degrees Celsius to melt or vaporize the material, and then use high-pressure gas to melt or vaporize the material. The vaporized material is blown away from the slit for the purpose of cutting the material.

The investment in laser cutting equipment is relatively large. Most of them are currently used to cut thin steel plates and some non-metallic materials. The cutting speed is fast and the accuracy is high. However, laser cutting will produce arc marks and thermal effects at the cutting slit; in addition, laser cutting is not ideal for some materials, such as non-ferrous metals and alloys like aluminum and copper, especially for cutting thicker metal sheets, the cutting surface is not ideal or even impossible to cut. The current research on high-power laser generator is to solve the cutting of thick steel plates, but the cost of equipment investment, maintenance and operation consumption is also considerable. Water cutting small investment, low operating costs, cutting a wide range of materials, high efficiency, easy to operate and maintain. Laser cutting apprentice to learn how long.

3, the use of laser cutting machine: what is the role of laser cutting machine?
Laser cutting machine has many functions and is currently widely used in various fields, such as: furniture, home, textile and clothing, medical equipment, aerospace manufacturing, automotive ships, sheet metal processing, hardware products, electronic appliances, advertising industry, etc.. It is a kind of manufacturing industrial laser processing. A big company like Da Clan Yuming Laser has developed industry-specific laser cutting machines according to the characteristics of different industries. His CO2 laser cutting machine should be one of the most complete in the industry. It can cut various materials, such as metal, non-metal, fabric, leather, foam, wood, plastic and other materials.

4, the use of laser cutting machine: what is the use of laser cutting machine
Laser cutting machine is widely used for many industries and a variety of materials. The performance and use of laser cutting machine.

Sheet metal processing, advertising sign word production, high and low voltage electrical cabinet production, mechanical parts, kitchenware, automotive, machinery, metal crafts, saw blades, electrical parts, glasses industry, spring pieces, circuit boards, electrical kettles, medical microelectronics, hardware, knife and measuring instruments and other industries.

1, laser cutting machine can cut carbon steel: cutting carbon steel laser cutting machine can cut 2MM brass?

I have sold many brands of laser cutting machines. Mainly high-power, cutting metal materials.

1, the current maximum cutting capacity of laser cutting machines in industrial applications.

Carbon steel is (steel plate quality is good, the speed can be in / min or so), the

If the quality of the steel plate is good, the machine is good and the graphics are not complicated, the cutting quality is still very good. The key is not fast, with plasma cutting machine or flame cutting machine is more reasonable.

Stainless steel is (high-pressure nitrogen as an auxiliary gas when the speed is slower / min)

But domestic users generally target laser cutting, mild steel below, stainless steel below

2, the maximum stroke of the laser cutting machine.

There are currently two types of laser metal cutting machine.

One is a desktop, the general effective cutting range of 1, 5 * 3m 2 * 4m

The other is a gantry laser cutting Effective cutting range can be very large. The effective cutting width can be 2-6m, and the length can be tens of meters. The same structure as flame cutting machine and plasma cutting machine.

3. Speed and accuracy.

If the main cutting board of the owner is below 6mm, it is recommended to buy a desktop laser cutting machine. Speed and accuracy are better than the gantry type. Beam laser

If the owner wants to cut most of the material is more than 3mm, and the size of the product is very large, it is recommended to buy a gantry type.

4, the brand and price of the first echelon: through fast, Bacchus

The second echelon: Amada, Murata, Mitsubishi, Mazak, Prima

The third echelon: Nanjing Optics Valley Notai laser, Shanghai Unity Prima, Shenzhen Da clan, etc.
The fourth echelon: other companies

Price is directly proportional to the brand.

5, laser cutting machine can work all day.

6, how to choose a laser cutting machine.

The most important thing is to see what kind of products the owner cut. In my personal experience, if the owner’s products are mainly small-sized parts, and mainly thin plates, then the choice of desktop machines, which brand depends on your budget. Even more than after-sales service, the price and life of parts and supplies. Running costs when cutting, etc.

If most of your products are more than 3MM, and the material is a large size of the plate, the parts to be cut is relatively large, choose the gantry laser cutting machine. Such as construction machinery, shipbuilding, environmental protection machinery and other industries that require cutting large and thick plates.

7, advertising time: I am now selling gantry laser cutting machine.

The current three power laser cutting machine steel plate is not very good, it is recommended to consider only 25) stainless steel (high pressure)

Stainless steel pipe is an economic section steel, is an important product in the steel industry, can be widely

Used in life decoration and industry, many people in the market for making stair handrails, window guards, railings, furniture, etc.. Commonly available in 201 and 304.

It accounts for about 8% of the total steel and 16% of the total steel, which is used in the national economy in an extremely wide range of applications. Because of the steel pipe has a hollow section, and therefore suitable for liquid, gas and solid transport pipeline; at the same time with the same weight of round steel, steel pipe section coefficient, bending and torsion strength, so also become a variety of machinery and building structure on the important material. Structures and components made of stainless steel tubes have a larger cross-sectional modulus than solid parts under equal weight. Therefore, the stainless steel tube itself is a kind of metal-saving economic section steel, it is an important part of steel, especially in the oil drilling, smelting and transmission industries are in greater demand, followed by geological drilling, chemical industry, construction industry, machinery industry, aircraft and automobile manufacturing, as well as boilers, furniture and bicycle manufacturing also need a large number of various steel tubes. With the development of new technologies such as atomic energy, rockets, missiles and space industry, stainless steel pipe in the defense industry, science and technology and economic construction is becoming more and more important.

Stainless steel pipe is safe, reliable, sanitary and environmentally friendly, economical, thin-walled pipes and new reliable, simple and convenient connection methods developed successfully, so that it has more irreplaceable advantages of other pipes, the application of engineering will be more and more, the use will become more and more popular, the prospects are good.

And its development is still continuing. In order to make stainless steel in the traditional application of better performance, has been improving the existing types, and, in order to meet the stringent requirements of high-grade construction applications, is developing new stainless steel. Due to increasing production efficiency and improving quality, stainless steel has become one of the cost-effective materials of choice for architects.

Stainless steel combines performance, appearance and use characteristics, so stainless steel will continue to be one of the world’s good building materials.

With the implementation of China’s reform and opening-up policy, the national economy has gained rapid growth, urban residential, public buildings and tourism facilities are built in large numbers, the hot water supply and domestic water supply has put forward new requirements. In particular, water quality is becoming more and more important and the requirements are increasing. Galvanized steel pipe, a common pipe due to its easy corrosion, will gradually withdraw from the historical stage under the influence of relevant policies, plastic pipe, composite pipe and copper pipe into the common pipe of the piping system. But in many cases, stainless steel pipe is more superior, especially the wall thickness of only 0.6 ~ 1.2mm thin-walled stainless steel pipe in high-quality drinking water system, hot water system and will be safe, sanitary water supply system in the first place, with safe and reliable, health and environmental protection, economic and other characteristics. Has been proven by domestic and foreign engineering practice is a good comprehensive performance of the water supply system, new, energy-saving and environmentally friendly pipe, is also a very competitive water supply pipe material, will play an incomparable role in improving water quality, improve people’s living standards.

In the building water supply system, as galvanized steel pipe has ended a hundred years of glorious history, a variety of new plastic pipes and composite pipes have been rapidly developed, but a variety of pipes still have some shortcomings in varying degrees, far from fully adapt to the needs of the water supply system and the requirements of drinking water and related water quality. Therefore, the relevant experts predicted that: the building water supply pipe material will eventually return to the era of metal pipe. According to the foreign application experience, in the metal pipe identified thin-walled stainless steel pipe for the comprehensive performance of one of the good pipe.

Promotion

Thin-walled stainless steel pipe, domestic production and use in the late 1990s, is the new generation of emerging in the field of pipe, has been used in large quantities in the building water supply and direct drinking water pipeline.

Thin-walled stainless steel pipe durable, has been recognized by the engineering community, and the relevant parties are reducing the wall thickness, reduce prices to facilitate further promotion. Especially small diameter stainless steel pipe, the price is not high, so the supporting connection method, the reliability of the fittings and price is the main factor in determining its development. Domestic developers in Sichuan, Guangdong, Zhejiang, Jiangsu and other places have developed their own connection technology and fittings, is a very promising pipe development. The Ministry of Construction and related departments also attach great importance to this new pipe, according to the Chinese Technology Market Management Promotion Center, National Science and Technology City word [2001] No. 71 document, on the promotion and application of “high diameter wall ratio high-precision stainless steel water pipe and supporting fittings and special technology” notice was informed that the thin-walled stainless steel pipe technology and products The promotion and application of this technology and products to improve the grade of China’s modern buildings, improve and protect water quality are of great significance.

At the same time, the Ministry of Construction attaches great importance to the promotion and application of thin-walled stainless steel pipes. The industry standard of “thin-walled stainless steel water pipe” was released in 2001. Related pipeline engineering technical regulations and installation atlas, the Ministry of Construction has issued a document, is responsible for the preparation of Tongji University. Currently, Sichuan, Guangdong, Zhejiang, Jiangsu and other places have professional manufacturers of thin-walled stainless steel pipe production, the product has tended to mature, thus, the time has come to promote the application.

Domestic prospects are good

① building water supply pipeline demand

According to the “building business” Ninth Five-Year Plan and 2010 Visionary Goals Outline “estimates, 2001 to 2010, the annual demand for pipes for 50 ~ 600,000 km, including residential buildings within the hot and cold water pipe demand for 400,000 km. grade, is of great significance.

② Pipeline direct drinking water is developing rapidly

With the development of the national economy, pipeline direct drinking water in the domestic cities of Beijing, Shenzhen, Shanghai, Chongqing and other cities are developing rapidly, economically developed medium-sized cities are also actively planning to catch up straight. In the direct drinking water, stainless steel pipe system is undoubtedly second to none. The current domestic upscale hotels, public places have been configured or in the configuration of direct drinking water pipes.

③ domestic alternative to imports has a bright future

In order to promote stainless steel pipe, China since the 1990s from the reduction of wall thickness, reduce costs, to solve the “high diameter wall ratio of high precision” thin-walled stainless steel pipe technology, so that the application of stainless steel pipe to promote the development of rapid. A pipeline to promote the application, less localization. When, the domestic manufacturers have a part of the production and further development of thin-walled stainless steel pipe and fittings capacity.

Stainless steel seamless tube is a long steel with hollow cross section and no seams around. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the higher the processing cost.

The process of the product determines its limited performance, the general seamless steel pipe precision is low: uneven wall thickness, low brightness of the tube appearance, high cost of sizing, and the internal and external appearance of the pockmarks, black spots are not easy to remove; its detection and shaping must be processed offline. Therefore, it reflects its superiority in high pressure, high strength, mechanical structure material.

Manufacturing method

According to different production methods can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes, etc.

1.1, hot-rolled stainless steel seamless pipe is generally produced on automatic tube rolling units. Solid billets are inspected and cleared of surface defects, cut to the required length, centered on the perforated end of the billet, then sent to the heating furnace for heating and perforated on the perforating machine. In the perforation while continuously rotating and advancing, under the action of the rollers and the top, the internal cavity of the billet gradually formed, called the hairpin. Then sent to the automatic rolling mill to continue rolling. After filtering, the wall thickness is evenly adjusted by an equalizer, and the diameter is fixed by a sizing machine to meet the specifications. The use of continuous rolling mill to produce hot rolled seamless steel pipe is a more advanced method.

1.2, if you want to get smaller size and better quality seamless pipe, you must use the cold rolling, cold drawing or both combined methods. Cold rolling is usually carried out in a two-roller mill, steel pipe in a circular hole pattern consisting of a circular groove with a variable section and an immobile conical head. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5 to 100T.

1.3, the extrusion method is about heated billet placed in a closed extrusion cylinder, perforated bar and extrusion rod together with the movement of the extrusion, so that the extruded parts from the smaller die hole. This method can produce smaller diameter steel pipe.

This type of steel pipe can be divided into stainless steel seamless steel pipe and stainless steel welded steel pipe (seamed pipe) two categories, according to the different manufacturing processes can be For: hot-rolled, extruded, cold-drawn and cold-rolled these basic types, according to the shape of the section can be divided into round and shaped tube, widely used is round steel pipe, but there are some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal and other shaped stainless steel pipe.

For steel tubes subjected to fluid pressure are subjected to hydraulic pressure test to test its pressure resistance and quality, under the specified pressure does not occur leakage, wetting or expansion for qualified, some steel tubes also according to the standard or demand side requirements for rolled edge test, flaring test, flattening test.

Seamless stainless steel pipe, also known as seamless stainless steel pipe, is made from ingots or solid billets that are perforated to make a blank tube, and then hot rolled, cold rolled or cold dialed.

Compressors are mechanical devices that are used to increase the pressure of a gas or vapor by reducing its volume. They play a critical role in a variety of industries, including HVAC, refrigeration, and manufacturing. There are several different types of compressors, each with their own advantages and disadvantages.

One of the most common types of compressors is the reciprocating compressor. This type of compressor works by using a piston to compress the gas or vapor. Reciprocating compressors can be either single-acting or double-acting, and can be driven by an electric motor or an internal combustion engine.

Another type of compressor is the rotary compressor. Rotary compressors use a rotating element, such as a screw, vane, or scroll, to compress the gas or vapor. They are often more efficient than reciprocating compressors, and are commonly used in HVAC and refrigeration systems.

Centrifugal compressors are another type of compressor that are commonly used in industrial applications. They work by using a high-speed impeller to increase the velocity of the gas or vapor, which then passes through a diffuser to convert the velocity into pressure. Centrifugal compressors are often used in large-scale manufacturing processes, such as petrochemical production and gas pipelines.

In addition to these types of compressors, there are also specialty compressors that are designed for specific applications. For example, scroll compressors are often used in refrigeration systems, while diaphragm compressors are commonly used in medical equipment.

Regardless of the type of compressor, they all play a critical role in a variety of industries. They are used to power pneumatic tools, compress natural gas for transportation, and even generate electricity in some cases. As technology continues to advance, compressors will likely continue to play an increasingly important role in our lives.