Why Temperature is Important in Die Casting

If you want to avoid die casting defects and other problems then die casting temperature control is a real issue. When it comes to temperature and the consequences of poor temperature control while die casting like Aluminum Die Casting, it becomes necessary to understand the difference between metals.

Temperature Effects on Aluminum Die Casting

For metal die casting Aluminum is one of the most popular choices. It has good corrosion resistance, is lightweight and durable. For die casting the most popular aluminum alloys are 360, 380 and 413.

For example, for Aluminum 380, you’ll see a tensile strength of 48 at 75 degrees and yield strength of 24. Yield strengths range from 41 KSI down to 18 KSI for 500 degree in case of Aluminum Die Casting Process 390.

How Thermal Factors affect Die Casting

In die casting the thermal factors are the temperature of the die casting machine, the temperature of the alloy used for casting and the temperature of the die itself. For the highest-quality parts all of these factors must be kept in an optimum temperature range.

Temperature Needed for Die Casting

If you don’t want to put a strain on the mold, then you definitely want the alloy to be about 50 to 70 degrees F higher than the initial crystallization temperature. At about a third of the alloy temperature the mold itself needs to be maintained. It is quite complex to calculate the correct temperature for the casting chamber and it needs to be determined by the casting engineer.

Effects of Temperature in Die Casting

 

In general, in die casted alloys from Aluminum Die Casting Manufacturer as temperatures increase, tensile and yield strengths decrease. You need to keep this fact in your mind if you need parts with high tensile strength. Along with this, with the increase in temperature ductility increases, but changes rely on the type of alloy being die casted. For example, aluminum is less ductile than zinc, but in the process temperature must be higher for aluminum.

Get to Know Every Details About Die Casting

Die casting is an automated casting process in which under high pressure and at a high filling speed the liquid melt is pressed into a mold. Generally alloys with a low melting point are used. For series and mass production of components this casting process is particularly suitable because, unlike sand casting, for example, permanent metal molds are used which after casting do not have to be destroyed. With low wall thicknesses it is possible to produce large and complex components.

There are two different ways of manufacturing components in die casting: hot chamber and cold chamber die casting. In both manufacturing processes, with a release agent prior to the casting process the mold is sprayed in order to make sure that the subsequently cast part can be easily removed from the mold. However, into the mold cavity the melt is not directly poured, but is first filled into the casting chamber of the die casting machine. From there, by a piston through one or more channels the alloy is pressed into the mold.

 

Materials

In die casting, to manufacture components non-ferrous metals are used and for a particular application the choice of alloy depends on material properties, budget and weight.

One of the most important materials is Aluminum in Die Casting Process with a share of more than 80 %, followed by zinc and magnesium. However, you can also use copper, lead and tin. The alloys have different properties.

Many advantages are offered by die casting alloys:

• High corrosion resistance
• Good processing properties
• High thermal conductivity
• High electrical conductivity
• High strength and hardness
• Very good EMI/ RFI isolation

Fields of Application

For large series production die casting is mainly used. During the manufacturing process, despite the use of high pressure, a high casting quality is achieved. In the production of very thin (up to 1 mm) (lightweight) components, the die casting process is highly suitable.

Along with this, there are other industries in which die cast parts from Die Casting Manufacturer are used:

• Lighting Technology
• Power Tools
• Aerospace
• Furniture
• Electronics
• Machinery
• Domestic Appliances

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