Posts Tagged ‘pressure’
Aluminum Casting Foundry Crafts
Aluminum Casting Foundry Crafts
In the casting method, Aluminum Casting, and other non-ferrous alloys in addition to using sand casting, but also extensive use of metal casting, centrifugal casting, low pressure casting and casting and other specialty graphite casting method.
By reference to a large number of patent documents on Aluminum Casting process technology advances to do a systematic description, through detailed investigation and authoritative technical information and related intelligence gathering, providing customers with Aluminum Casting Products core technology application, technology development, process equipment, facilities, many high-end information technology applications for enterprises to understand the various types of Aluminum Casting and the development of production technology is very useful.
Aluminum Casting Special Processing
To meet the national economy and high demand on the multi-copper, special processing techniques have been developed, mainly include: high-precision Copper Strip, ultra-thin copper foil, enhanced internal oxidation particles, a variety of metals, laser surface hardening, semi-solid forming, shaped casting, particles enhanced particle control, are highlighted as follows:
1. Precision Copper Strip
Shaped frame with high accuracy transistor type copper, phosphorus and silver generally high strength and high conductivity alloy, thin section from the side edges and composed of thick, thick edge was 1.27 mm and 0.38 mm for the Needle Valve thin side, bandwidth 68 mm, length greater than 200 meters, triple types of production methods, which pass rolling, milling chips, high-speed production of profiled forging billets, and then by high-precision rolling, the key is precision rolling technology, the need to ensure that even the thick and thin side extension coefficient equal to, or shaped with a plate can not meet user needs.
2. Within the oxygen-free copper oxide dispersion strengthened
Vacuum device required oxygen-free copper, hydrogen gas welding in the 930 ℃ without distortion, using the method of alloying is difficult to achieve, at home and abroad using the oxide particle dispersion strengthening method, commonly used oxide particles AL2O3.
In the copper alloy casting, metal casting methods to accelerate the solidification of castings to improve quality and reduce casting defects, has an important role. Metal casting can be broken grains, reduce porosity, improve the alloy’s mechanical properties and gas tightness, high lead content in lead bronze alloy of copper, metal casting, to prevent the segregation of copper components. Also, because copper alloy castings, cylinder components, and other more, so more by centrifugal casting method. In addition, large Aluminum Casting Coach Bags low pressure casting method can be used to improve the alloy density, and reduce the casting in the casting process produces inclusions. Some of the copper alloy pressure casting method can be used.
Centrifugal Fan Solenoid Valve Hydraulic Fittings
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Whole Line Casting Iron Line
Posted in Sand Casting Foundry | 
Tags: Copper, information technology applications, non ferrous alloys, particle control, pressure, Technology | 
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Ductile Iron Application
Ductile Iron Application
The scope of ductile iron application can be divided into four fields: First, pressure pipes and fittings. Second, the automobile industry. Third, agriculture, road and construction applications. Fourth, general engineering.
1. Pressure pipes and fittings
Ductile iron pipe has been used to transport water and other liquids, which testifies to the ball better than gray cast iron pipe. Because cast iron has excellent strength and toughness. These physical characteristics make the pipeline withstand the high operating pressure, and can withstand the excavation near pipelines and municipal construction and transportation requirements.
2. Automotive applications
The automotive industry is the second largest ductile iron casting application fields. Ductile iron has been used in cars in the three main areas: first, the car engine parts, second, gears and bushings, third, suspension, brakes and steering. Almost all crankshafts of the Ford Motor Company have been manufactured by ductile iron. Most of the worldwide cars are fitted with ductile iron crankshaft, instead of forged steel crankshaft.
3. Agriculture, road and construction applications
Modern agriculture requires a reliable and long service life of agricultural machinery. The entire agricultural industry are widely using ductile iron castings including tractor parts, plows, brackets, clamps and pulleys. For other types of agricultural machinery including bulldozers, moved into machines, cranes and compressors, ductile iron castings in these areas have a very wide range of applications.
4. General engineering applications
The machine tool industry is using the excellent engineering performance of the ductile iron to design complex machine parts. Ductile iron has high tensile strength and yield strength, and good mechanical processing properties, thus allowing production of lighter castings to keep a good rigidity. Similarly, the strength and toughness of ductile iron has made it to be widely used in all kinds of hand tools such as wrenches, clamps and gauges etc.
Paper manufacturing industry is using the high strength and high elastic modulus of ductile iron. These properties can reduce the weight of the pressure drum and drying drum.
Therefore, ductile iron castings have been widely used in many industrial areas worldwide. With the continuous development of metal founding, the application of ductile iron must be wider in the future.
This article was from Dandong Foundry Blog.
Galen Wang has worked in iron foundry for many years.
Do you ever mind how ductile pipes are made which we often see them in underground drainage’s. Watch this video.
Video Rating: 5 / 5
Related Ductile Iron Castings Articles
Posted in Ductile Iron Castings |
Tags: cast iron pipe, Ductile, Ductile Iron Castings, machine tool industry, pressure, Strength |
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Introduction to High Pressure Die Casting
Die casting is a custom manufacturing process that produces engineered metal parts by injecting molten metal under very high pressure into reusable molds, called “dies,” made from premium tool steel. The dies can be designed to cast very complex shapes and sharply defined product features with a high degree of accuracy and repeatability, often with no post-casting machining required to meet part specifications. Unusually smooth surfaces can be produced as-cast, as well as a variety of textured surfaces. Die castings are suitable for a range of cosmetic finishes to match other mated parts or add extra durability in use.
Advanced high-pressure die casting, with some machines operating at die clamping forces exceeding 4500 pounds per square inch, is capable of producing net- or near-net-shape castings of high integrity and dimensional precision— at very high cycle speeds. A complete die casting cycle can vary from less than one second for small components weighing less than an ounce, to no more than two-to-three minutes for a casting of several pounds.
The process’ advantages make die casting the most efficient technology available for producing a wide range of commercial, industrial and consumer products in durable, rigid metal. A range of metals can be die cast, but the majority of die castings are non-ferrous parts, in aluminum, magnesium and zinc. High pressure die casting is an efficient, economical process that offers a broader range of shapes within closer tolerances than many other metal manufacturing techniques. Die cast parts are used in many industries including automotive, locomotive, agricultural, marine, and plumbing.
Visit Rheocast Company http://www.rheocast.com to learn about our high pressure die casting capabilities for many industries including plumbing, automotive, and agriculture.
Posted in Metal Casting |
Tags: Casting, die, dimensional precision, High, Introduction, Metal, pressure, range, reusable molds, shape castings |
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Casting Industry
High pressure die casting enables economical quantity production of castings at a fast rate. These castings can comprise of varied holes, screw threads, recesses, and are identified by a high dimensional accuracy and good surface finish. They enable good economy of metal and need very little surface finishing. The principal on which pressure die casting is based, includes forcing molten metal into a mold or the die, under considerable pressure. The machines which are used for this reason operate on one or two systems :
* Hot Chamber Machines ( for metals with a low softening point )
* Cold Chamber Machines ( for metals with a high softening point )
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In the hot chamber machines the metal is kept liquid in a crucible within the machine, and the pressure chamber that delivers the metal into the die is located in the metal bath. This machinery can be pneumatically operated, or more sometimes develop the pressure by the action of a ram. The casting metal for a cold chamber machine, is kept liquid in a holding furnace, from which it is moved to the pressure chamber, by means of a scoop or a special automatic device and is forced into the die by the way of a ram. Some straightforward machines are hand operated, but fully automatic machines are far more frequently employed for high rates of production.
In pressure die casting, precision made dies of complex multipart design and so extraordinarily dear are used, and exposed to severe conditions of work, by high pressures and high successive variations in temperature. For the production of zinc and zinc alloy castings the dies may be made of unalloyed steel, however for magnesium, aluminum, copper and the alloys of these metals, the dies are often made from hot-work steel, that has much greater sturdiness.
Another development in high pressure die casting is vacuum die casting. It produces castings which have an even better finish than standard high pressure castings. There are two systems, the die is either enclosed in a hood which abandons the air, or the holding furnace is installed under the casting machine, so that on the evacuation of the air from the die, the metal is sucked into the die and is compacted in it, and a process for making iron castings based on this principle has been developed..
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http://www.metalcastingzone.com/
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Posted in Metal Casting |
Tags: alloy castings, Casting, cold chamber machine, die, high pressure die casting, industry, Metal, pressure |
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Best Pressure Die Casting
Best pressure die casting
This relates to a pressure die casting machine and in particular to an apparatus and method for moving a die of a pressure die casting machine.
Pressure die casting is the injection of melted metal or plastic under high pressure into a mould cavity.
Before injecting the melted metal into the cavity, the mould is “closed” i.e. the two halves of the mould, called dies are brought together, after which dies are held together while the melted metal is forced into the cavity they form. The metal is allowed to solidify in the shape of mould cavity and then the dies are pulled apart so that solidified object may be ejected and the cycle repeated.
To manufacture die castings free of pores and shrink holes it is normal practice to fill the mould at high pressure and to let the metal solidify while under high pressure so as to effect compression of die casted metal. The apparatus which closes the dies and holds them together needs to have capacity to withstand this high pressure and it is required to work for long hours.
To simplify the clamping procedure for holding the dies together the apparatus uses a die casting machine which has one die fixed on the machine base and second die half is removable into and out of apparatus. Thus movement and control apparatus might be given for one half of die. This has an additional advantage that the hot melted metal can be fed into the mould cavity or chamber between the dies through a sprue in the fixed die.
Aluminium and copper alloys that attack and erode machine components with which they are in regular contact are generally produced in what is called cold chamber machine, whereas tin, lead and zinc die castings are processed in a chamber called hot chamber machine. The pressure die casting machine is equally well used in hot and cold chamber pressure die casting.
A die casting machine uses a fixed and moveable die. Four tie bars or guideways are rigidly connected to two plates upstanding from the machine lease; one die is placed on one plate while the other die is slidably mounted on the tie bars. Pressure oil is given to an operating cylinder containing an operating piston which is linked to a displacement yoke linked in turn with guide spars these are externally threaded to receive nuts between which the yoke is clamped.
The dies are closed and melted metal is entered into cavity of dies from the sprue in the fixed die and required pressure is given. After the metal solidifies the pressure on the dies is released and two halves of dies are separated and finished product is taken out and process of pressure die casting is repeated.
The same process of pressure die casting is used in plastic moulded die casting products the only difference being that instead of melted aluminium, melted plastic is poured into the die from a sprue fixed in lower die and required pressure is given. After the plastic cools down and solidifies the pressure is released, and die opened and finished product is taken out and process repeated.
Posted in Small Business |
Tags: cold chamber machine, copper alloys, die, die castings, machine, pressure, Steve Manik |
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Die Casting
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.
Posted in Business |
Tags: Australia, die, different shapes, Korea, liquid material, pressure, process, steel molds |
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