Are all metals can be cast?
All metals can be casted because in principle casting is a process in which the material to be casted melted / fused first and then refrigerated / frozen in accordance with the desired shape.
What are the causes of defects in castings?
The cause of defects in castings is the selection of printed materials that are less precise, the shrinkage of metal during the cooling process, the mold cavity there is a lot of dirt, slag or other particles that could interfere with the process of metal casting, metal composition, mold design and pattern, at the time melting and casting processes, inlet and adder (Raiser) on the mold.
Is the metal casting techniques can be used to blow or a blow? Can not.
Is there a difference steel with cast steel?
Cast steel is an iron-carbon alloy containing less than 1.7% carbon. In addition to the cast steel contains Si content of 0.20% - 0.70% and 0.50% Mn - 1.00%.
How does disability prevention? What can be melted again?
How to handle defects can be melted down again, in the grinding / grinded, welded.
What does he mean kind of reprints and disposable? Give an explanation!
Type reprints are molds that can be used repeatedly. While disposable molds are molds that can not be used repeatedly. Usually to separate the results cast mold, the mold is destroyed. This kind of mold materials used can be recycled. Contonya sand molds.
What are the disadvantages and advantages of induction furnace?
Ans. Taking advantage of induction furnace is that it can be used for superheating, arrest the temperature, duplexing or parallel furnaces, capable of regulating the chemical composition on a small scale smelting. The disadvantage is only used on a small scale foundry industry.
Give an explanation of the various mold?
Based on the material used, namely:
• Prints wet sand (green-sand molds)
Prints made from wet sand
• Prints dry skin (skin dried mold)
The entire mold is made of wet sand and then the surface is in contact with the pattern sprayed or coated with material that hardens when heated
• Prints dry sand
Prints made from coarse sand by using the material for the fastener. Points molds made of metal. Dry sand mold does not shrink when in contact with heat and free of air bubbles.
• Mold clay (loam mold)
Framework molds made of brick or metal coated with a clay surface is smoothed.
• Prints furan
Dry sand is mixed with phosphoric acid and furan resins that can be shaped and quickly hardens
• Prints CO2
Clean sand is mixed with Sodium Silicate and solidified in a pattern and then hardened with CO2 gas flowing
• Metal Prints
Molds made of metal. Usually cast metal has a low melting point
• Special Prints
Moulds made of plastic, paper, cement, plaster or rubber
CO2 molds used for applications such as what?
CO2 molds normally used in intricate shapes and has good detail, and is used to mold surfaces slippery
Types of molds most widely used and most efficient?
Types of molds made of sand because it can be worn again and again, it's cheap, easy to obtain, for the working of a specific type of mold can be modified so that the results obtained can be tailored to the wishes.
What is the special mold process?
Ans. Special molds made with certain materials for certain construction adapted to the conditions or circumstances (be specific)
How wet sand mold making process?
Ans. The sand around the pattern thickness of approximately 10 mm was mixed with a binder so that when sand dries to form a hard surface. The other part consists of the usual wet sand
Why printouts in Indonesia is relatively coarse when compared with foreign products?
Ans. Printouts in Indonesia is more rugged than the results produced abroad, more because of the factor of production costs and more stringent specifications applied.
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