First of all, when it comes to choosing what weight and style of darts there isn’t a wrong answer. The only thing to keep in mind is to not spend a lot of money on your first set of darts. Typically you will change darts after your first year of throwing, so don’t spend a lot until you know which dart fits you perfectly. Ultimately, it all comes down to what makes you feel most comfortable when you’re at the line. Here are a few guidelines to help you choose your right set of darts:

Overview of dart types. There are many different darts to choose from: wooden darts, brass darts, nickel/silver darts and tungsten darts. The most popular dart for dart league throwers is the tungsten dart because a high-density tungsten dart will resist wear and creates a smaller barrel that allows tighter groupings of darts. Brass and nickel/silver darts are cheaper and are made from softer metal darts meaning the knurling can wear down quickly from skin oils, friction and contact from other darts. When buying tungsten darts you need to pay attention to the packaging because the percentage of tungsten is very important to the quality of the dart. The main benefit of a high-quality tungsten dart is that the barrel will be smaller so you will be able to throw tighter groupings of darts, minimizing bounce outs.

Try out multiple dart weights. Darts are available in weights from 12 grams to 50 grams. It is rare to see someone throwing with darts heavier than 30 grams, but most dart organizations allow for darts up to 50 grams. Make a visit to your local dart store and throw the same dart style in each weight class. The speed in which you throw the dart will help determine which weight to choose. The lighter the dart the harder/faster you have to throw it. The location of the weight on the dart barrel is also important. Some darts are heavier towards the front of the dart (front-loaded) and others are back-weighted. Try them all and you’ll develop a feel for what works best for you and your throwing style.
 

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We all fall into a rut from time to time. But how do you know if it’s just one bad night of throwing or if it’s the beginnings of a full-fledged slump? Here are few things to help you get out of tungsten dart throwing slump:

Never back down. Regardless of how you’re throwing, never approach the line with defeat on your mind. If you are already thinking negative thoughts chances are you will fulfill those thoughts. Always remember every dart is a new dart. Your three tungsten darts are completely independent of each other so keep pushing yourself with every throw.

Don't over-think it. Always remember that it’s a bigger deal to you than it is to everyone else. So don’t over think it. The moment you start foreseeing your tungsten darts missing the target is the moment of no return. Dig deep and find your confidence. Grip it and rip it. You’ll be back in top shape before you know it.

Don't change your throwing style. We’ve all been there before. You aren’t throwing like you expect. So, in a fit of desperation you begin to alter your stance, your grip or your throw. This is the worst time to make changes. Typically a slump isn’t due to the mechanics of your throw. More often than not it’s due to psychological reasons. Keep your style the same and change your outlook. This would be a great time to use positive visualization techniques, such as remembering your best 501 finish. Remember how you felt when you threw that last tungsten dart and it landed right on target! Change the way you're looking at your tungsten darts and you will notice a difference.

Calm your nerves. The calmer you are the better you will throw. Concentrate on controlling your breathing and think about something pleasant, like your last vacation. The goal is to slow down your heart rate and kill any nervous jitters you may have. Take your frustration out on the tungsten dart board. It’s much easier said than done, but try to avoid getting mad or emotional. Focus your frustration at the dartboard, but don't throw your tungsten darts as hard as you can. Instead, take out your frustrations on the board by concentrating on what you're aiming at and you will forget about your slump in no time.
 

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The basic principle of tungsten carbide rotary atomizing nozzle is that provides liquid for high-speed rotation center so that the liquid surrounding the rotating element or thrown bore, it is by means of centrifugal force and air power to atomize. When the flow is small, the centrifugal force is stronger than the liquid surface tension, and turntable edge throws a few large droplets and divides directly.

While the flow and speed increases, the liquid is drawn into much filamentous flow and becomes very unstable. The liquid leaving the rim at a distance due to the effect of friction with the surrounding air is separated into small droplets. As the flow and speed increases to a certain extent, the liquid film becomes thinner outwardly extended, and separated from the friction with the surrounding atomization at the same time.

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Compared with straight-flow atomizing nozzle, centrifugal nozzle working principle is more difficult. In the beginning, the given velocity of liquid is low, the liquid surface tension and inertial force plays an important role. Even if liquid surface tension is stronger than inertial force, liquid film shrinks into vacuole, it will still break up and become drops under aerodynamic. With the increasing pressure and spraying speed, film liquid will become instable and break up because of inertial force. Finally, the ribbon-shaped film liquid will vibrate against air movement so that liquid surface tension and viscosity become weaker gradually, and atomizing under higher pressure.

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According to atomizing type, they can be divided into pressure atomizing nozzle, rotary atomizing nozzle and media atomizing nozzle. Tungsten carbide pressure atomizing nozzle will spray flow to steady or low-speed airflow for atomizing under high fluid pressure. While different structures of ways inside have different atomizing process, they can be specifically divided into straight-flow atomizing process and centrifugal film-liquid atomizing process. The straight-flow atomizing process is simple, which includes liquid surface tension, viscosity and air resistance. Liquid turns drops, smooth flow and wavy flow into atomization gradually.

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The influence of welding time for quality: In a short time, the welded surface fully physical contact gradually, and diffusion of atoms become sufficient, welding shear strength and welding rate increases by welding time steadily. However, when the strength of soldering seam reaches the strength of tungsten carbide, if adding welding time continuously, it will make tungsten carbide particles become bigger and bigger so that some micro-bore will appear and the strength of soldering seam will decrease, which because of the different spreading speed between Co and Ni. Therefore, reasonable welding time is a guarantee for improving the soldering seam strength.

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The influence of welding temperature for quality: Welding temperature plays a significant role in welding plastic deformation, enlarging the contact area between two welding surfaces, accelerating spreading process and improving the strength and compactness of soldering seam. In addition, with the welding temperature increasing, the strength of soldering seam will improve gradually. When the temperature is running up to a certain value, the yield strength of material will remarkably reduce, the contact areas will rapidly increase and welding rate will improve a lot.

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In order to improve drilling efficiency, people invented a kind of nozzle, which is longer and closer to the button. The jet-flow impacts the bottom and disperses, its the fluid up and down do not interfered, which can effectively enhance drilling rate of 28%. However, the nozzle inside structure is too complicate to manufacture by normal compression molding. So some researchers used heat pressing impregnate-powder casting to attempt.

But the materials contain Cu and other soft metals, which decreases the hardness, anti-corrosion of nozzle and shortens the lifespan. Therefore, a new method brazing after compression section molding appeared. It still remains some problems that the strength of soldering seam is not good, which replaced by vacuum welding procedure.

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Promote exploration mineral and get more resources

During these years, the exploration of minerals has been commercialized in Ganzhou. The government encourages enterprises to invest in it. Through minerals exploration carried out by geological survey department and companies, the deposit of tungsten in Ganzhou has been proved much bigger than ever before. In June of 2004, China Geological Survey Bureau held the Strategic Seminar on Gannan geological exploitaion Plan, and confirmed Ganzhou as the national strategic area of tungsten exploration. A new project of mineral exploration was launched and supported financially by the Ministry of Land and Resource. A geological research base and post-doctorial work station were set up here by Chinese Academy of Geological Science. They are studying the regulation of tungsten formation on the conditions of special structure. This is a good basis of talents and technologies for minerals exploration.

 

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Promote the reform of enterprises and develop tungsten industry

The private and shareholding enterprises prospect in Ganzhou, whose production occupied 80% of that in the whole tungsten metallurgy and processing industry. There are Chongyi Zhangyuan Tungsten Co., Ltd. whose business covers mining, dressing, metallurgy, down stream products processing, research and development, import and export; Ganzhou Tejing Tungsten and Molybdenum Company which cooperated with the stock listed company of Tianjin Tejing Material Co., Ltd.; Ganxian Shirui Mineral Co., Ltd. which cooperated with foreign companies to do mining in the other province and even abroad; Jiangxi Yaosheng Industry and Trade Co., Ltd. which based on the resources to extend the down stream products processing. These companies are vivid with much more potential of development and find their own position in Chinese tungsten industry as well as become the leading force of Ganzhou tungsten industry.

As an outstanding representative, Mr. Huang Zelan, the president of Chongyi Zhangyuan Tungsten Co., Ltd., was elected as a national model. 

 

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