Posts Tagged ‘Australia’

Metal Stamping House

Stampings is the process of cutting and forming metal alloys into specific forms, especially for use as components for large machinery or structures. Metal sheets can be molded into different pre-defined forms for use as food, as regular pots and jars. The most common alloys used in metal stamping steel, zinc, nickel, aluminum and titanium. Stampings is a very effective and productive means of production of many types of metal on a large scale.

In stamping, metal sheets are placed in a matrix or a press tool which is specially designed cavity that gives the preferred form of sheet metal. Upper part of the matrix is connected to the press slide while the lower component connects to the press bed. Specific component known as the blow pushes the sheet metal through the die, thus performing the actual development of the operation. After pressing metal coated with gold, palladium, nickel or tin to prevent corrosion.

Coverage also increases wear and solderable nature of the product. Sometimes leaves are also pre-coated before the stamping process, and then purify the product from excess stamping oils and films. The product is then heat-treated to make it stronger, because it is still in soft condition after stamping. The product is then subjected to the process of deburring to remove sharp corners. This is done with chemicals or abrasives. Stampings also includes other processes such as metal-piercing, cleaning, shaping and drawing on the same machines.

Precision metal stamping is applicable to many industries like computers, electronics, electrical, dental, aerospace, instrumentation, military specs, defense, telecom and automotives. There are many methods in precision metal stamping for producing stamped prototypes. Blank creation is one such method. Blank creation involves the creation of a flat state of the component. The flat blank sheet is then used to make the part’s features. In blank creation, there are many processes like nibbling, chemical etching, water jet cutting, wire EDM, punch and die.

Stamping presses have specific strength, speed and accuracy to give a definite form to the metal. There are two types of metal stamping presses: mechanical and hydraulic. They are available in a wide range of power, size, stroke length and operating speed.

Stampings are gradually replacing other metal forming processes, like casting, forging, fabrication and processing. One reason for this is the very low cost of metal stamping. Dies for stamping cost less than those used in the forging and casting. In addition, the metals used in metal stamping can be harder than those used in other processes, resulting in a final product stronger. The cost of secondary processes, like cleaning and plating is also significantly reduced.

In addition, there are certain foods that should be done only through a metal stamping: Base weights, brackets, balance clamps, brake flanges, conveyer flights, bushing seats, engine bases, flywheel shrouds and friction plates. There are also various types of stamping including: Deep drawn stamping, electronic stamping, embossing Fourslide, medical stamping, embossing and short-term, progressive stamping. The most commonly used type is a progressive drawing Die where the sheet metal passes through a series of stamps and stamping dies made all at once, thereby significantly reducing the time it takes.

With complete in-house facilities from Tool & Die design/making, blanking, punching welding to final coating, it assures a good control sheet metal of quality. With top quality control, our products have been exporting to Australia, America, Germany. England, Ireland, Russia, and other countries for more than 15years.

The History of Sterling Silver Jewelry

Silver jewelry has been around for a long time and has been enjoyed by generation after generation since as far back as 5000 B.C. According to historical investigations and reports Egyptians used silver for jewelry, ceremonial ornamentation, and for bartering and tombs have been discovered containing silver that dated back as far as 2900 B.C.

Although there are many modern technological ways to work silver today this wasn’t the case back when silver first began to be used to make jewelry. At the time the process for working jewelry involved either the use of a hammer to get the desired design and look or casting and pouring silver into the desired shape for a piece of jewelry. A third way that silver was worked into silver jewelry in ancient time was through filigree techniques. This is the process of taking thin silver and twisting it and wrapping it into intricate designs that can be held together by soldering.

All of these ways that were once used to work silver provide for a fairly rough, simple jewelry but it just goes to shoe how long individuals have been enjoying the beauty of silver and wearing it to make a fashion statement or as a sign of wealth. The beauty of the low cost precious metal has not been lost on a generation yet to date. You can find gorgeous pieces from all different points in history and from all different regions of the world.

Many Indian tribes used silver to make jewelry. Often you will see these pieces around still today; many of these pieces also have turquoise in them. Silver and turquoise go beautifully together and make for a lovely piece of jewelry. The contrast between the two colors is brilliant.

Another part of the world that is known for their use of silver is Mexico. Silver pieces made in Mexico have a wide selection of stones in them. These stones range from inexpensive coral, which is a beautiful red color, to a pricier boulder opal, which has a brilliant mixture of colors, to a simple emerald with all of its elegant beauty.

Other parts of the world that silver comes from include Peru, Chile, China, Poland, and Australia. All of these countries have been mining silver for many years with Mexico and Peru being the longest, mining silver dating back as far as 1546. And the silver that these countries mine is not only useful for jewelry but for other things as well, such as cutlery, and heat conductors.

Silver jewelry has been a profitable industry for many, many years and from all indications it appears that the inexpensive precious metal will continue to be popular in future generations too. Silver jewelry will not loose its elegance and simplicity from over years that can be worn anytime we want and for that may be compared with gold jewelry. I have a feeling that many pieces from the past will stick around to be enjoyed for many years to come.

Jarrie Wilson is the manager of mexican silver jewelry site, 925wholesale.com. For information about sterling silver jewelry visit silver jewelry for any occasion..

Die Casting

Metal Casting
Macie asked:


Every day in our lives we use die casting material but are completely oblivious to the process that is in place. Thousands of manufactures use this die casting to come up with daily items such as toys for children and even equipments that change our very method of working. Die casting has certainly provided the human race with a plethora of products that are incorporated into major appliances and automobile industry.

Conceptually, casting is a manufacturing process and requires articulate calculations to create the required outputs. This process injects liquid material into different moulds to solidify the mould. The amalgamation results in different fabricated parts. The primal benefit of casting process allows manufactures to create specific parts that are not economically feasible to create on the general assembly line. Million of parts that are made via die casting process could not have been achieved otherwise since the cost of producing certain items are not economical or even production possible. Any form of casting is a labor intensive process that requires a specific skill set. All processes from temperature building, quantity and quality of the liquid to be injected, form and shape of the mould, to the coolness technique of the output products all require specific skill sets. Without an accomplished team, it become very difficult for die casting manufactures to delivery quality products.

Die casting is a similar process in which molten metal is put under high pressure into the cavities of steel molds. The molds are called dies. The dies also come in different shapes and varieties in properties. Die casting process is heavily used in the automotive industry to create different body parts. Australia’s auto industry supports a large local die casting business, manufacturing parts that include cylinders, pistons and engine sumps etc. A very similar growing industry also flourishes in Korea as well since Korea is home to a large number of automotive manufactures. Die casting is one of the most efficient means of producing car parts since it is more feasible than the older versions of liquid casting and other strenuous techniques. Die casting has allowed for the substantial growth in mass production of automotives as well as parts for airplanes and trains as well.

Flourishing economies of scale also come with its price and challenges. Mergers and alliances are now a common practice in die casting manufacturing countries to streamline and hone processes to cater to the booming economy and mass productivity requirements. The die process entails four major steps that are required to be followed sequentially. The first step is to spray the mold with any form of lubricant and then close the mould. Different lubricants are used as per the requirement of the finished good. There are several benefits of using lubricant in the process. The lubricant both helps control the temperature of the die and it also assists in the removal of the casting. Effective lubricant can be the differentiator factor of average versus customer centric products. Molten metal is then injected into the die under high pressure. The high pressure assures a casting as precise and as smooth as the mold. This stage requires extreme caution in regarding to the pressure and checking of any defects in the mold. Once the cavity is filled then the pressure is maintained until the casting has become solid (though this period is usually made short as possible by water cooling the mold). There are also different ways of cooling the mold water cooling being one of them. It typically takes a lengthy amount of time to cool down the molds if left simply to nature. In order to expedite the end product, different cooling techniques are used. Finally, the die is opened and the casting is ejected. This is the entire process of the die casting procedures.

The clamping efficiency defines the quality of the machines that are used in the die casting manufacturing process. Typical sizes of the die casting machines range from 100 to 4,000 tons. Along with the massive weights also comes a gigantic size associated with the machines. Majority of the machines can be as large as regular home sizes in any city of the world. Irrespective of size, there are primarily two types of categories of die casting machinery. One is the hot chamber machines for zinc, magnesium and lower melting-point metals and the other is the cold chamber machines for aluminum (http://automobile.dmc.co.kr/eng/Aluminum-Die-Casting-Manufacturer.asp ) and higher melting-point metals. A die casting machine automatically opens and closes the mold and injects the liquid metal, all under high pressure and as rapidly as possible, in the case of zinc up to several hundred times an hour. This time line is also dependent upon the machinery features and the vendor. Extensive research and work has taken place to hone the die casting manufacturing machine features and make it more simple and cost effective both in terms of pricing and productivity. There are several key milestones that all die manufactures are looking anxiously to reduce. Time to produce the end product, minimize quantity of goods used in the entire process and enhance the overall skill set of individuals are all the key elements that need improvement. The anticipated reduction is approximately 30% – 40%, but the overall reduction is around 20% and that too in the human resource department. Engineers are now being trained on specialized avenues in die casting which helps in reducing the overall human resources required.

One of the ongoing challenges with die casting is detecting surface and sub surface defects within specific timelines. Defects and variances in the final products are still on the high end. Due to the high number of defects and variance, a large amount of raw material is lost and put forth as waste. Vendors have realized this gap in identifying the defects and variances during the process. Fully automatic machines are now being manufactured to cater to this ongoing challenge. A fully automatic fault detecting machine named CAST vision has been produced and a prototype process is in place for extended in-plant on-line trials. This is the third year of this project and it is giving good results. The result of algorithm which was designed and developed in 2nd year has been put to test now. By prototyping the CAST team had designed and developed a working system CAST vision. This can discriminate between good and defective parts.



Iron Metal Casting