Metal casting known to man since 500 years ago . At the time it was used for making sculpture , tools , weapons , and jewelry out of bronze .( cara pengecoran aluminium )
China and India are the countries that initiate the development of metal casting techniques . Currently it has spread throughout the country and the goods of metal casting has also been a very important role in all sectors of human life , for the manufacture of transportation equipment , household appliances , medical equipment , construction , building , up to the manufacture of machinery parts manufacturing industry .
Every year the production of the metal casting industry produces no less than 100 million tons of various shapes and sizes , which are made from various materials , such as cast iron , cast steel , aluminum , magnesium , bronze , brass . For special purposes have also developed various kinds of industrial products foundry goods made from nickel , chrome , niob , tantal , titan , lead , tin and zinc .
Product goods industry knowl – castings are processed through the various methods of printing , pe – herb , smelting and RIAD SOFIA wishful to produce goods of high quality and efficient , ranging from lightweight objects that only weighs a few grams up objects more than 500 tons robot .
Materials commonly used silica sand molds and mold steel as fixed , as a result of technological developments ceramics , plaster and grafitpun has become an alternative material that can be selected as printed materials , in line with the needs of production , especially material that is poured and the dimensional accuracy of the production results ( precision castings ) .
Economical In Production
Product development in the manufacturing industry has always started from the design bureau , to determine production specifications . Goods to be manufactured are designed to be easily processed and protected from failure , then the determination of the type of material production is always referring to the strength of the load , temperature and resistance to chemical solvents and economical in the production process . Through these considerations then determined the process method , the method can be selected forging , machining or casting process . Often the designer to choose the method of casting metal is seen as the most economical . Mainly to create objects with complicated shapes .
Environmentally Friendly , Raw Materials and Energy Saving
Byproduct of the metal casting process was very little , much less adverse impact on the neighborhood , however at least a byproduct in the manufacture of the casting process is always returned as a raw material . Recycling or re- utilization of by-products in the process of metal casting is susuatu that run automatically , while the waste generated nothing more than smoke and sounds that do not damage the environment .
More than half of the melted raw material for the manufacture of cast objects derived from scrap materials , this means the metal casting industry is not only environmentally friendly industry , but the industry pembersihkan environment of secondhand goods .
While the by-products or other ingredients are added as raw materials always have a technical purpose .
Such patterns have led to the production of this industry not only saves the cost of raw materials , but can also save energy because reprocess scrap materials would require less energy than mineral processing .
Safe products Used
Security of the objects cast is guaranteed by the quality of standardized testing .
Critical parts of private vehicles and public transport vehicles , airplanes and even the safety of the nuclear industry demands , then the testing of the casting must be tested and x-rays , ultrasound and other tests of the strength and resilience
Metal Casting Production Process
Metal casting industry in the production process involves a series of complex processes with the level of use of diverse technologies , so as to carry out improvements must be based on each chain process individually , then assembled in the overall process chain binding compact .
In addition to the above process chain there are also other contributing factors affecting the performance of the foundry industry . Such as distribution and testing of raw materials , economic and cultural aspects of work should also be considered in order to improve sharper with more guaranteed success rate .
To design an object to be processed in the foundry , with the collaboration between designers – people from casting workshop plays an important role .
Only in this way results castings specifications and construction methods in line with what can be imagined by the designer , to achieve the highest possible efficiency .
Each type of material and the production of the requested amount will determine the construction techniques, must necessarily be based on a consideration of the economic aspect .
Pattern -making is a tool that is used as a master mold for the manufacture of molds can be classified into patterns of metal and wood patterns ( including patterns of plastic ) . Metal pattern is used in order to maintain the precision of castings for large quantities .
Age patterns of metallic materials have a longer life , so that productivity is higher metal pattern .
While the pattern of the wood materials are generally less resistant to friction , so that its use is usually for a little amount of production . ( Read: jasa pengecoran Aluminum )
And plastic patterns are usually used for many production quantities with high measurement accuracy , due to the replacement or reproduction new patterns more easily and quickly .
Materials of metal patterns can vary according to the consumer , for the refractory metals used cast iron , cast steel and copper alloys suitable for the manufacture of mold pattern on the skin . While the use of aluminum as a material typically used for manufacturing pattern mold by hand .
The pattern is made of wood and wood bump resistant friction , low cost , fast and easy process compared with the metal . The pattern of the wood is used for sand molds and surface pattern reinforced with a plastic coating .
Important factor in deciding the type of material is the pattern of economic considerations in accordance with the sum of manufacturing costs , and the quality of the castings produced .
Mold and Core Making
Prints can be divided into the mold and the mold still missing . In the mold is lost , any object requires a new mold , it is necessary for a pattern , can be of metal , wood , wax , clay ( loam ) , gibs or epoxy resin . The pattern has a size slightly larger than the object , since the metal will shrink on cooling time and for permesin workmanship provided the size advantages . Permanent mold casting does not require patterns , prints made with the machine shaped mold ( negative ) of the object to be created , and are generally made of cast iron or steel .
In addition to these two types of mold are also mold precision required for this method where one pattern for each object , since the pattern will be lost or damaged every time pouring .
If the casting is required there is a hole or cavity , it is necessary to shape a core made of sand with a certain force which is not damaged when it gets hot and the mechanical load of the liquid . The core is shaped the same as the shape of the hole to be made , soon after cairaan freezes , this core will be removed from their sockets .