die casting process step by step what is die-casting process? - science - sooperarticles.com

by:Hanway     2019-08-11
Casting is the process of forming a metal product by melting the metal and pouring it into a cavity called a mold and making it solidify, there are several casting methods, such as gravity casting or permanent casting, casting, die casting, hot chamber machine, cold chamber machine, semi-centrifugal castingCentrifugal casting.Lost wax casting method for precision casting, plaster mould, Shell molding, wood, rubber and paper mould.
In this article, we will discuss the advantages and disadvantagesAdvantages of die casting process.

1) very high productivity is possible, that is, in the cold chamber type of 75 to 150 units/hour and the hot chamber type of 300 to 350 units/hour.
2) in zinc, close dimensional control can be maintained, and the tolerance is /-0.Size 075mm to 25mm and /-0.Each additional 025mm can be easily achieved by 25mm.
3) cast thin section;Under favorable conditions, the minimum thickness of the casting is about 0.Zinc is 5mm, 0.Aluminum 875mm.
1250 micron surface finishmm R.M.Therefore, S can be obtained, thus improving the appearance and minimizing the finishing operation.
5) high precision and successful reproduction of details.
6) die casting dies maintain their accuracy and practicality for a long time, and zinc alloy dies may produce up to 5 million castings.
7) for mass production, die casting is very economical due to the elimination of machining and mold manufacturing, thus saving labor and time.
8) due to the uniformity of wall thickness, die casting requires less material than sand casting.
9) There is no possibility of sand inclusions and a strong dense metal structure is obtained.

1) the equipment and molds used are costly and require a large enough quantity to compete economically with other processes, as the minimum economic number of die castings is considered to be 20,000 pieces per production lot.
2) with the increase of metal temperature, the life of the mold decreases rapidly.
3) in some cases, there is a bad cooling effect on the metal.
4) the metal with a high coefficient of shrinkage must be removed from the mold as soon as possible because the mold cannot contract with the casting.
5) There are certain restrictions on the shape of the die casting, and the process does not adapt to the production of large castings. so far, the maximum size is cast to 100 kg zinc and 30 kg aluminum.
6) the die casting usually contains some air holes due to the accumulation of air.
7) die casting is largely limited to low-melting non-ferrous alloys.
With the gradual improvement of the heat-resistant metal of the mold, this process can now be used in many alloys.
In addition, you can use several engineering calculators online at the edge of the calculator.

Calculate the pressure casting equipment.

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