How to Manipulate Button Bar

In a water jet cutting machine , when you open the NC system , starts to working , you will see Under AUTO mode, all picture manipulation button columns is POS Function Screen are the same, as shown in Fig five-twenty.

(LOAD)

Hotkey: F1, it is available only under AUTO mode. Pressing down the button will pop up “ Open and Load “ dialog , choose the target file, click(Open) button , and water jet system will load it into parse engine for machining.

(UNLOAD)

Hotkey: F1, it is available only under AUTO mode. Its function is to uninstall the loaded from NC Studio water jet system.
(BREAKPOINT RESUME)

Hotkey: F3, it is available only under AUTO mode. This button is only available when power-off, E-stop, or when user presses (STOP) button during water jet cutting machining process. If user can insure the accuracy of work piece coordinate, user can press this button to continue machining. If not, please go back to the reference point first and restart the water jet machining. This function can also be applied to simulation mode.
(SIMULATION)

Hotkey: F4, it is available only under AUTO mode. Simulation function provides user with a fast but lifelike simulation environment. Load a processing file, press(Simulation) button and then press (START) button on the operation panel, water jet cutting system will carry out simulation automatically system., but more advanced. To run a water jet cutting machining file under simulation mode, system will not drive the water jet cutting machine tool to do the relative actions, but only show the cutter race with high speed in the processing trace window. By simulation, user can know about water jet cutting cutter’s movement in advance, avoid damage (to the water jet cutting machine tool) which is caused by mistake in writing procedure, and get other additional information. By simulation, user can also know the machining information, which user can look over INFO function screen under POS function section.

(SELECT NPRECESSING)

Hotkey: F5, it is available only under AUTO mode. This function is used for program jump execution. Press down the button, system will pop up an “EXECUTE(ADVANCED OPTIONS)’”dialog box, as shown in Fig. 5-21/ Choose start position and end position in current machining program, then click “OK” button, the machine tool will carry out the selected block as requirement. This function can also be used for simulation.

(HANDWHEEL)

Hotkey: F6, it is available only ender AUTO mode. Press button (HANDWHEEL), user can control water jet cutting machine tool only by MPG; and then all of button on operating panel is invalid.

(Auto Back)

Hotkey: F7, it is available only ender AUTO mode. Press the button, a dialog “AUTO BACK” will pop up, and the water jet cutting machining program will be executed in reversed order. If user wants to change to Auto Forward or Stop state, please press the corresponding button on “Auto Back” dialog; if user closes the dialog, auto back state will be automatically substituted by auto forward state.



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Plastic Straps

Plastic strapping is used in a lot of situations. Plastic strapping is usually used for load stabilization and unitizing products together. Some people also use a combination of stretch film, and strapping to help secure loads of different sizes and weight.



Polypropylene strap is the most popular way of strapping. It always use with a variety of packages and loads. There are a multiple sealing types that can be used with polypropylene strapping. Here below we will highlight two seals that used for strapping. They are two types of finishes on the pp straps in the market.
The first finish I want to tell is the embossed finish. This type can give extra texture and, add friction to the straps. The embossed finish offers a diamond-shaped finish which allows more friction and slip resistance to buckles or seals. For much embossing can compromise the strength of the strapping.



Secondly, Polypropylene strap offered in a smooth finish as well. The smooth finish allows the plastic strapping to be stronger and is intended for heavier loads. Strapping with a smooth finish has a much higher tensile strength than strapping with an embossed finish.



Moreover, Poly strapping is safer to use since it doesn’t have sharp edges, it is easier to dispose, and it costs considerably less than metal or steel strapping. And if your company need to send out many packages that requiring secure packaging, then opting for poly strapping may be the better route for you to take as it not only lets you enjoy ultimate strength in securing packages but it also has a number of conveniences that businesses will surely appreciate. Not to mention that there are different kinds of poly straps available so different conditions are met as need.



Polyester strap is the strongest of plastic strapping materials which is design to use as an alternative to steel strapping because of the strength it provides, and the ability to reduce the overall weight of the load. It’s also available in a wide variety of widths and thicknesses in plain or embossed textured finishes. Polyester contours well to aid strap tension while providing high rigidity and low creep factors. Moreover, polyester strapping is used with a variety of hand and machine sealing tools. The highest initial tension can be applied and retained over a longer period of time compared to other plastic strapping materials. Polyester is also available in machine grade and is very easy to recycle.



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Uninterrupted Power Supply

The uninterrupted power supply classification

Generally speaking, uninterrupted power supply can be divided into three categories according to its different working methods: backup, online and on-line interactive. The backup uninterrupted power supply operation is simple: when the power is normal, electricity will be provided directly to the computer equipment; when the utility power is disconnected, battery uninterrupted power supply inverter to the computer and other equipment power supply. That is to say that in most of the time is by city electric equipment for power supply, so the backup uninterrupted power supply for city power network exists on the surge, peak, frequency offset can be eliminated. But the uninterrupted power supply backup power capacity is small, but it has the advantages of simple technology, low cost, cheap price, and it will be suitable in voltage stability occasions. Line interactive uninterrupted power supply is also a backup job in uninterrupted power supply state, its working principle and common backup uninterrupted power supply are the same, because it is used in the three port type, increasing pressure stabilizing device, so that when the electric voltage and frequency are consistent with the target time, directly to the municipal power stabilizing pressure on equipment supply. On line interactive uninterrupted power supply is made in the perfect uninterrupted power supply structure, and the biggest difference lies in the online uninterrupted power supply inverter is that it always working, and it will be the first rectifier AC into DC power supply, inverter, at the same time to charge the battery, inverter in the DC inverse into AC output to the load; when city electrical voltage or frequency does not meet the requirements of the times, the inverter is powered by the battery to continue to support the work load; and when overload or inverter fault time, directly by the bypass to supply power to load. The biggest advantage of this way of working is that it will be the input and output completely isolate, avoiding electric in various fault and unstable factors, to conduct a comprehensive and thorough protection equipment.

Online uninterrupted power supply systems

Online uninterrupted power supply systems is a kind of tools can sale and buy automatic driving of power that can be effective to prevent driving circuit without the normal voltage. The online uninterrupted power supply systems are convenient for us. The uninterrupted power supply can be extended to the voltage circuit to make sure that the circuit can work normally. Mobile uninterrupted power supply and it is also called a battery backup, mobile power supply. Uninterrupted power supply itself is a battery pack that can be used for charging the mobile phone mobile power supply through the battery pack charging the electrical energy stored in the inside when the mobile phone has no power.

Uninterruptible power supply

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries or a flywheel.



www.everexceedcorp.com is a professional supplier to develop high standard uninterrupted power supply. Welcome to contact us for detail information about uninterrupted power supply. Our engineering personnel and technicians are rich in experience of design, development and manufacture of uninterrupted power supply.



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Brief Introduction of Heat Pump

What Is a Heat Pump?

A heat pump is a device that transfers thermal energy from a heat source to a heat sink. Heat pumps can move thermal energy in a direction which is opposite to the direction of spontaneous heat flow. A heat pump uses energy to accomplish the desired transfer of thermal energy from heat source to heat sink.

How dose Heat Pump Work?

Heat pump system is an electrical device that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used in China and around the world for decades. Refrigerators and air conditioners are both common examples of this technology. Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of evaporation and condensation. A compressor pumps the refrigerant between two heat exchanger coils. In one coil, the refrigerant is evaporated at low pressure and absorbs heat from its surroundings. The refrigerant is then compressed en route to the other coil, where it condenses at high pressure. At this point, it releases the heat it absorbed earlier in the cycle.

Heat pumps are used to provide heating because less high-grade (i.e., low-entropy) energy is required for their operation, than appears in the released heat. Most of the energy for heating comes from the external environment, and only a fraction comes from electricity (or some other high-grade energy source). In electrically powered heat pumps, the heat transferred can be three or four times larger than the electrical power consumed, giving the system a Coefficient of Performance (COP) of 3 or 4, as opposed to a COP of 1 of a conventional electrical resistance heater, in which all heat is produced from input electrical energy.

Different Types of Heat Pumps

There are 2 main types of heat pumps which you could install in your home.
1. Air heat pump. With air source heat pumps there is no need to dig, drill or have a large plot of land. Instead, the energy is collected directly from the surrounding air using an externally located air module. This can be located up to 30 meters from the outside of the building and is then linked to a heat pump unit which is located indoors for maximum efficiency.

2. Geothermal heat pump. Ground heat pumps harness the stored solar energy from just beneath the ground surface, via a horizontal collector loop which is located at a depth of approximately one meter below ground level and at a distance of approximately. 75m apart. This is an ideal system for larger plots of land, with the exact area required being dependent upon the capacity of the heat pump required and the thermal conductivity of the soil in the specific location.

www.heat-pumpsystem.com. SPRSUN was set up in 1999, we dedicated in research and development, production, and installation of solar water heater, solar photoelectric, solar air conditioner in earlier period, we have supplied plans of energy saving rebuilding project and construction works for many large and middle-size enterprises, commercial buildings, hotels, schools and hospitals.

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How to Choose Skived Fin Heat Sink?

Skived fin heat sink

The skived fin heat sink has the best and consistent thermal performance and longer life than folded fin heat sinks has. Normally the min thickness for Al fins may be 0.4mm & 0.15mm for copper, and the max fins height can be 500mm for aluminum and 200mm for copper. Currently the max width of skived fin heat sink from fluid is 365mm, and 500mm width is in developing. Fluid has good knowledge and professional experience in the process and quality control of skived fin heat sinks made by aluminum or copper. Nowadays many factories can offer the customization for the application by the most competitive price.


The advantages of skived fin heat sink

The process of skived fins is to use skiving the aluminum or copper block directly. So there is no any interface between the fins and base, a well conducting could be performed 100% based on the material. The fins of skived products could be thinner & higher than current extrusion products, just also increase the heat exchanger of fins area. It has the advantage of stacked thinner fins & extrusion no interface conduction and they also have a lower cost on the tooling. The advantages of skived Fin include there is no interface on the fins & base due to a solid aluminum or copper material made, and the thinner fins can be made to 0.4~1.0mm. And the heat sink width can also be 100mm for aluminum and 60mm for copper. The fins height can be 500mm for aluminum and 200mm for copper.



Skiving is a manufacturing process where thermal solutions are formed by shaving one solid block of copper or aluminum into a finned heat sink. This method eliminates the resistance layer that is present with the solder layer in silent cpu coolers, since skived fins are built from a single piece of metal.The silent cpu cooler require minimal tooling charges, which makes it a cost effective solution. Silent cpu cooler can also be customized with embedded heat pipes to add a performance boost if needed. Silent cpu coolers are manufactured from a single block of material that is shaven with a controlled technique to produce a silent cpu cooler that has a dense population of uniformly shaped and distributed fins. The benefit is a large cost saving to alternatives such as high aspect ratio or silent cpu cooler. Silent cpu cooler deliver maximum heat dissipation compared to other cooling solutions with greater package dimensions. For applications that require high airflow that require a small package dimensions, silent cpu coolers are the right choice.



www.heatsinkvet.com is a professional supplier of skived fin heat sink in China, and they are delighted to offer various skived fin heat sink. As a supplier of skived fin heat sink, it has the ability to offer a unique flexibility to all customers with a multitude of choices for skived fin heat sink.



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Japan Accelerates to Get Out of China Rare Earth Reliance

Japan's Dependence on Chinese Rare Earth
In July 2012, the U.S. energy company Molycorp CEO Mark Smith stood at the high platform of Mountain Pass in California, overlooking the front of the equivalent of 200 Tokyo Dome huge mine and introduced to several Japanese reporters: "the mined ore inventory ran out two days ago before mine closure, and we just begin with a new production of rare earth ore mined once the production officially began, once it should be a steady stream to export to the Japanese companies." With the Sino-Japanese economic relations cooling, followed by political relations with the Japanese media worried that once again, China, as the largest rare earth manufacturer, is it possible to control exports of rare earths? Security Strategy of Japan's rare earth has once again been tortured. 80% of Japan's rare earth supplies from China. In fact, starting in 2010, Japan began to widely discuss the sources of supply of rare earth off the road. The Japanese side had to be painstakingly want to be able to get rid of the situation is extremely dependent on Chinese rare earth supply.

The Road of Japan "Rare Earth off China"
Over half of the rare earth supply in the world is from China. But the environmental pollution problems caused by this important resource exports and mining has been a point of controversy. In addition, in the past 20 years, China's domestic consumption has increased by 10 times. Since 2005, China has strengthened to restrict exports, and which makes Japan's high-tech industry in trouble, and this made a lot of domestic rare earth supplier lose their foreign markets. Japan's Kyodo News thinks that Japan-China collision occurred in 2010, and then China has rare earth export restrictions, substantial delay associated with Japan's import and export cargo clearance procedures in the various ports. Although Japanese media worried again restrict exports of rare earths, but generally agreed that the actual situation is very different from two years ago.

Japan and the U.S. Joint Hands in Rare Earth Industry
With the reduction of China's rare earth exports, the United States has a huge rare earth reserves began to re-production of rare earth, such as the United States energy company Molycorp7 of month announced the restart of the Mountain Pass, California rare earth mining. The company has the world's largest rare earth producers. In the past, once the world's largest rare earth mine, also in the history it has a close relationship with Japan. The mine began production in 1952, due to demand for CRT color TV and other operating smooth sailing. But since the 1980s, due to the price of Chinese enterprises offensive, the company's performance began deteriorating. The wastewater pipeline rupture accident occurred in 1998, the mine was forced to shut down in 2002.

www.rareearth-china.com is a leading company committed to the production, research and development, sales ceramic raw materials and cerium oxides and other rare earth materials for chemical industry, as well as chemical raw materials for glass-ceramic. If you are interested in our products, welcome to have a visit to our page!

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What is Uninterrupted Power Supply?

The uninterrupted power supply classification
Generally speaking, uninterrupted power supply can be divided into three categories according to its different working methods: backup, online and on-line interactive. The backup uninterrupted power supply operation is simple: when the power is normal, electricity will be provided directly to the computer equipment; when the utility power is disconnected, battery uninterrupted power supply inverter to the computer and other equipment power supply. That is to say that in most of the time is by city electric equipment for power supply, so the backup uninterrupted power supply for city power network exists on the surge, peak, frequency offset can be eliminated. But the uninterrupted power supply backup power capacity is small, but it has the advantages of simple technology, low cost, cheap price, and it will be suitable in voltage stability occasions.

The Daily Work of Uninterrupted Power Supply
In their daily work, should be familiar with their use of cell type, it has the basic characteristics and performance. It can guide us to correctly use and maintenance, have very important sense, to extend the service life of the battery is very important. When charging, the best control in 10 ℃ temperature 30 ℃, right above 30 degrees C best to take measures to cool down the battery, to avoid overheating deformation; And the room temperature below 5 degrees Celsius, will cause the charge is insufficient, affect the service life of the battery.



The species of Uninterrupted Power Supply
The Uninterrupted Power Supply classification methods varied, according to the power size can be divided into large and medium-sized mistress power capacity; the output waveform can be divided into square wave, trapezoidal wave or sine wave; according to the input and output can be divided into single phase into single-phase, three-phase to single-phase or three-phase to three-phase; according to the work principle can also be divided into dynamic Uninterrupted Power Supply and static Uninterrupted Power Supply two categories. Dynamic ups backup power is dependent on inertial flywheel stored energy to maintain the load power supply continuity, the uninterruptible power supply with heavy, large noise, low efficiency, long switching time and other shortcomings, has been replaced by a static uninterruptable power supply. Static Uninterrupted Power Supply to batteries as the energy storage tool, city normal AC power is rectified into a DC electrical and electrical energy stored in the batteries, when the utility power is cut off by the inverter will be stored in the storage battery DC power into AC power to maintain power to the load. According to the different working modes, static Uninterrupted Power Supply can be divided into the backup Uninterrupted Power Supply, on-line Uninterrupted Power Supply, on line interactive Uninterrupted Power Supply and Delta transformation Uninterrupted Power Supply four kind of types.

www.everexceedcorp.com now offers a full range of lead acid batteries (network & motive power) and Nickel Cadmium batteries covering a wide range of applications from sophisticated telecommunications, uninterruptible power supplies, AGV to emergency lighting and security applications, and offers a full range of Monocrystalline, Polycrystalline Solar Modules combined with PWM/MPPT solar controllers, Grid-off/Grid-tied inverter covering a wide range of applications from sophisticated telecommunications, Power Electricity, Remote Area Electricity applications.

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Status of China's Rare Earth Industry

Reform of China Rare Earth Industry

China continuously pushes forward the reform of the rare earth industry, and promotes the formation of the rare earth market system investment subject pluralism, independent decision-making, and the price is determined by supply and demand. In recent years, China's rare earth industry investment gets rapid growth, the market is expanding, state-owned, private, foreign and other economic elements coexist, and rare earth market size is close to one hundred billion RMB. Market order is gradually improving, corporate mergers and reorganizations between progressive, "small, scattered, chaotic" situation initially changes in the rare earth industry. The level of science and technology is to further improve. After years of development, China has established a relatively complete system of R & D in the field of rare earth mining, smelting and separation, and the rare earth manufacturer has developed a number of international advanced level of technology, the mining process is unique and advanced separation technology for the development and utilization of rare earth resources laid a solid foundation. Rare earth new materials industries have been developing steadily, rare earth permanent magnet materials, luminescent materials, hydrogen storage materials, catalytic materials, and the new materials industry, provides support to transform and upgrade traditional industries and develop strategic emerging industries.



Rapid Development of China Rare Earths Industry

The rapid development of China's rare earth industry not only meets the needs of the domestic economic and social development, but also makes important contributions to the world's rare earth supply. Over the years, China has earnestly fulfilled the commitment to join the World Trade Organization, to comply with WTO rules, promote fair trade in rare earth. Currently, China, a country with 23% of rare earth resources bears more than 90% of the world market supply, and especially the cerium oxide manufacturer has made a great contribution. Chinese production of rare earth permanent magnet materials, luminescent materials, hydrogen storage materials, and polishing materials account for more than 70% of world production. The end products of China's rare earth materials, devices, and energy-saving lamps, micro motor, nickel-metal hydride batteries meet the needs of the world, especially the development of high-tech industry for many developed countries.



Problem of Chinese Rare Earth Mining Industry

During rapid development, China's rare earth industry also has many problems. As per the outstanding problems in the development of rare earth industry, the Chinese government further increases the supervision of rare earth industry. In May 2011, the State Council study and formulate and modify the improvement and enhancement of the relevant laws and regulations of the management of the rare earth industry. The Chinese government set up a rare inter-ministerial coordination mechanisms, research co-ordination of national rare earth development strategies, programs, plans and policies on major issues; establishment of rare earth office, coordinate the submission of rare earth mining, production, reserves, and export plans. In April 2012, the government approved the establishment of the China Rare Earth Industry Association.



www.rareearth-china.com is a leading company committed to the production, research and development, sales ceramic raw material for chemical industry, as well as chemical raw materials for glass-ceramic. If you are interested in our products, welcome to visit our page for more details!



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Household Leather Knowledge

Leather is a necessity of life of human decoration field. With the increase of the world population, and living standards rising, decorated leather consumption increases relatively.

Generally speaking there are several kinds of leather:

1.Genuine leather

It is made from processed natural rawhide. Genuine leather is often used for sofa and couch products.

Advantages: good air permeability, natural.

Disadvantages: it might smell bad because of the using of some deodorant, preservatives in manufacturing process.
Poor wear resistance and easy to fade, little change in surface texture. Color issues happen easily for large genuine leather goods. Need special care especially for its dermis pores. Easily affected by water, easily get mold.



2.Artificial leather

Artificial leather is a fabric or finish intended to substitute for leather in fields such as upholstery, clothing, and fabrics, and other uses where a leather-like finish is required but the actual material is cost-prohibitive, unsuitable, or unusable for ethical reasons.
Artificial leather is divided into the following three categories which can be supplied by Leatherette Manufacturer:
a.PU leather

Advantages: touch compliant, environmentally friendly biodegradable material.
Disadvantages: bad Waterproof performance, easily chapped by cold, poor wear resistance, surface easily hydrolyzed after contact with air and water, produce cracking phenomenon, not durable enough.

b. PU / PVC leather

Advantages: the lines are imported designing, can be composite production.

The surface of this leather can be antique, fashion, or even science and technology. Because there is no limit in the using, it has diverse and rich texture.It is easy to maintenance and has excellent color fastness and waterproof performance. Flameproof, wear-resistant, antibacterial and antifungal.
PU/PVC leather can be supplied by shoe leather supplier.
Disadvantages: not degradable, higher production costs



3. PVC leather

Advantages: durable, waterproof, good abrasion resistance. Lines are round with repression, cheap cost.

Disadvantages: very heavy plastic smell, not environmentally friendly, touch is not good, stiff. The color products need processing because of its poor color fastness. Lines are stiff and not natural enough because of its production crafts.



www.leathermanufacturer.net was established in 2000. Its predecessor named "The frist plastic group" was established 1983. The company is a professional synthetic leather manufacturer possessing two wet and two dry PU production lines and one set of new PVC production line as well as complete post-disposal equipment. Its mainly manufacture various middle-high grade PVC, semi PU, wet PU synthetic leather. Main products are furniture leather, shoes leather, handbag leather, garments leather and car seat cover leather.The quality of products is in line with International Inspection Standard.



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The State Quo of Industrial Nozzle Industry

Analysis of Nozzle Industry

From the entire market point of view, the domestic market of industrial nozzle is divided into the construction, expansion-way project market and the old transformation project market. From these two markets, the ordinary industrial nozzle products can basically meet the basic requirements, so the competition between enterprises is intense. With the market opening up, nozzle enterprises' needs of the market are deeper, which exacerbates the cost of product development and production of human and material resources, in addition, the production cycles are getting shorter, there are about 1300 industrial nozzle manufacturers in the domestic market in China, which can supply more than 3000 kinds of products, more than 20,000 specifications for urban public facilities nozzle, such as flat fan nozzle, and 80% of the sprinkler nozzle products can meet the demand of the domestic market, while the remaining 20% of the special requirements also need to import foreign products. With the introduction of China's 12th Five-Year Plan program, especially nozzle used in urban construction will be a large market, our the nozzle manufacturers need to play solid basic skills to produce the high-quality nozzle to meet the needs of our industrial nozzle and reduce the cost of economic development. Our country also needs to produce more durable high-temperature silicon carbide nozzles to meet the situation that our silicon carbide nozzle is highly dependent on imports.







Develop direction of China's industrial nozzle

China should develop new products for industrial nozzles, nozzles product development has to be developed around the focus of China's industrial development, so gathering strength, saving the expense of human and material resources, is to reduce the operating costs of enterprises. With the development of China's economic construction, China's focus economic construction is agriculture, environmental protection and infrastructure construction, and the nozzle market is mainly in electrical petrochemical, oil, and other urban construction industry in the future, and products to be developed are high quality industrial nozzles resisting to high temperature and high pressure, such as casting industry nozzle, large-caliber nozzle,spray gun nozzle to meet a huge market share of the industrial nozzle in China's chemical industry.



Development of China's industrial nozzle industry

Currently, shortage of low-voltage large-diameter nozzle cannot meet domestic demand, and new products are needed to be developed by the industrial nozzle enterprises. Enterprises should increase R & D efforts to increase capital investment and increase the development of new products, because the market competition is always won by quality and service. So enterprises have to establish their own brand, and the special products are the cornerstone for the survival of nozzle enterprise and make a positive contribution to China's industrial nozzle industry.



www.spray-nozzle.net

Spray nozzle is of high degree accuracy and intractable. On the basis of spray nozzle processing, Changyuan Co., Ltd. is developing precision finishing of hareware parts industry. Changyuan Co., Ltd. has twenty Japan-made CNC automatic lathes whose precision can reach 2 micro or below and several sets of five spindle lathes whose orifice precision can reach 0.10mm.



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Rapid Prototyping in the Mechanical Disciplines

Rapid Prototyping provides research platform for teachers

Laser rapid prototyping integrates optical, mechanical and electronic and information technology and it is another revolution of the traditional manufacturing technology following the numerical control technology, furthermore,rapid prototyping mold will play a tremendous role in promoting the construction of mechanical disciplines of colleges and universities. Taking the laser rapid prototyping as the platform can be carried out the multifaceted research work, and provide teachers with the opportunity to expand cooperation with enterprises. And every cooperation can be seen as a research project, so can apply for research funding at the provincial Science and Technology Commission and the Provincial Board of Education. The research results can be identified by the provincial Science and Technology Commission, the provincial Board of Education identified newspaper awards in scientific research to improve school quality of research work. Take the Xi'an Jiaotong University as an example, in the recent 2 to 3 years, it pioneers the development of automotive body, the key water-saving irrigation technology devices, artificial bone, and medical rehabilitation engineering, digital human research direction, to secure 863 of the number of national scientific and technological research and the natural Science Foundation with this unique technology.



Rapid prototyping provides a research platform 

Laser Rapid Prototyping is the platform and source of scientific research and graduate studies are more attuned to actual engineering work, at the same time, there have been a set of rapid prototype model to support research and postgraduate research. Graduate students can be engaged in the analysis and CAD, CAE, 3D repurchase and reverse engineering, technology, materials and the development of new products such as the broad field of research, and enhance the quality of graduate education, expand the scale of graduate enrollment.



Rapid prototyping carries out undergraduate education

Laser rapid prototyping is an advanced manufacturing technology to enhance the level of undergraduate teaching and practice, support innovation-oriented education reform work, and plays a great role in promoting mechanical engineering undergraduate cognitive, practical product development process, the ability to develop the use of advanced product development, especially in the CAD / CAE / CAM / RE / RP and mold manufacturing technology. Laser rapid prototyping can quickly change students CAD design into physical parts, to support technical support college students Innovative Design Competition and Product Challenge Cup game. There is no doubt that laser rapid prototyping plays more and more important role in the modern world, and we should make full use of it to apply it in the various fields.



www.rapid-prototype.net

Shenzhen Towell Model Manufacture Co., Ltd. has been one of the professional rapid CNC prototyping manufacturers in China since the establishment in 2002. Ever since, we have adhered to the principle of "Integrity, Foresight, Solution and Efficiency" and kept balanced development on scale and profitability. In the past decades, we have enjoyed sustained growth in both import & export business.



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Notes for Air Cooled Screw Chiller Selection

Definition and classification of air cooled screw chiller

Air cooled screw chiller is named as screw chiller because its key components compressor uses screw type. According to different cooling methods, it can be divided into water-cooled screw chillers and air-cooled screw chillers two kinds. The screw chiller cooling capacity ranges from 100Kw / h to 860Kw / h, screw compressor power ranges from 38Kw-178Kw, which can be widely used in all walks of life whose refrigeration is particularly huge amount. Below we introduce you notes to select air cooled screw chiller:



Firstly, the screw chiller selection should be considered in accordance with the cooling load and prepare for what aspect. For refrigeration system in longer low-load operating conditions, it’s better to select multi-head screw compressor group, ease of conditioning and energy efficiency, that is the dual-head screw chillers or three head screw chillers we often say, which may change as the load, the chiller automatically determines to open the capacity of the compressor and ensure open compressor in top working condition, in order to effectively save energy.



Secondly, at the selection of screw chillers, take precedence to consider the unit with higher performance coefficient values. In accordance with previous statistics, the normal chiller running time at 100% load accounts for less than 1/4 of the run time throughout the year; in minutes running time, 100%, 75%, 50% and 25% load running time ratio is roughly 2.3%, 41.5%, 46.1%, 10.1%. Therefore,low temperature chiller model with relatively flat efficiency curve should be prior in the selection of the chiller. In design selection, you should consider the chiller load adjustment range, multi-head screw chiller part load performance is good, the screw chillers can be selected in accordance with the actual situation of the factory.



Thirdly, at the selection of screw chillers, you should be aware of the conditions of the nominal conditions. The actual cooling capacity of the chiller is related to the following points:

1. Chiller water temperature and return water temperature, which is the shell and tube evaporator water temperature

2. The chiller cooling circulating water inlet temperature, flow rate, and fouling factor, refers to the condenser water temperature

3. If you use air-cooled screw chillers, please note the use of ambient temperature, humidity environment, these factors directly affect the efficiency and service life of the chiller;

4. Air cooled screw chillers have special requirements in specific industries, chemical, pharmaceutical, aerospace, machinery, aviation, chemical fiber industry needs clear that the use of local and sales staff in advance, such as the chemical industry may need electrical explosion-proof shell and tube evaporator needs to be corrosion resistant.



www.chillermanufacturer.net is professionally engaged in manufacturing Industrial Application Water Chillers and Energy-Saving Equipments. If you are interested in our products, please feel free to contact us!



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China Rare Earth Industry Self-Help has Many Difficulties

Chinese rare earth market situation

Since August last year, the Chinese rare earth tends to decline in both exports and domestic sales, not only the prices fall, production and sales lower, many traditional industries use rare earth cannot afford the high prices make rare earth costs rise, corresponding atrophy or alternatively reduce rare earth dosage. In April of this year, the price of rare earth has risen slightly, but stop soon in May. Particularly the lanthanum cerium accounting for about 75% rare earth elements is more apparent. In the case of the European debt crisis and the too high rare-earth prices, the export quotas also failed to complete in the first half of this year. Currently, the price has dropped to close to the level of April 2011, and the market still did not improve.



Expand domestic demand is imperative for China's rare earth industry development

Wang Zhongshan, vice chairman of the Nanjing Research on Rare Earth, said that after all, the rare earth is a small industry in the national economy; it causes trouble and impact to a wide range of industries. Some industries that originally use rare earth do the additives, modificators or functional materials instead look for other alternatives, or simply do not use the rare earth. Export has also lost some market. If not timely adopt policy to response, it is inevitable for China rare earth development step into the vicious cycle, the Chinese rare earth manufacturer will again face trough. Wang Zhongshan thought that making efforts to expand domestic demand and fight for the international market is imperative for China's rare earth industry development.



Domestic demand is the driving force for China rare earth

Wang Zhongshan thought that domestic demand is the driving force for China rare earth from discovery, development to the scale of production, application, and foreign trade accounting for the world's first, while domestic demand was originated from the promotion application in the 1980s. The Chinese rare earth develops and grows in the planned economy and market economy coexists period. In the early 1990s, low-cost development, sell foreign exchange earner, the market was formed in such circumstances. Low price and value deviation of rare earth in the past have objective reasons. The promotion and application is struggle for the annual number of rare earth as indicators.



Recommendation for China rare earth industry development

Although China rare earth production and export rank Top 1 in the world, there remains the gap in rare earth technology and the application with the world advanced level, which is also insufficient in saving rare earth materials application, applications, application process, etc. The rare earth supplier should have a long-term vision, and know the truth that lose domestic demand will loses survival, and it is recommend that the state play the role of the repository, purchase and store rare earth ore and products at reasonable prices, activating rare earth enterprises to develop steadily. When expand domestic demand, the temper justice with mercy export policy should be implemented, to maintain the China rare earth’s leading position in the international market.

www.rareearth-china.com is committed to the production,research and development, sales ceramic raw materials and cerium oxides and other rare earthe materials for chemical industry, as well as chemical raw materials for glass-ceramic.



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