An Introduction of the Cold Chamber Die Casting Process
Cold chamber die casting is a process operated by adding molten aluminum alloy material from a separate source to the injection mold chamber. The cold chamber die casting machine has the ability to work within a process of lower temperature, since molten aluminum is introduced from an outsider supplier.
In the process of cold chamber die casting, liquefied or molten metallic materials must be added during every mold injection or production cycle. The need of liquefied or molten metallic materials on a conventional cycle would have a potential influence on the production efficiency of projects that require mass production.
In addition, the increased pressure is needed to be used in this cold chamber process. The high pressure at which the liquefied metal material is shot into the die cavity and expands in the die cast cavity is obviously higher than the pressure which is needed for the operating of hot chamber die casting. Usually, the pressures between 3,000 psi and 50,000 psi are desired in the process of cold chamber die casting, in that case, die cavities are filled well.
Die castings which are produced by the cold box process have the following advantages: very precision design, thinner component walls and improved mechanical properties. Topper Die Casting has a large number of cold chamber machines. We produce high quality die casting parts for the automotive industry by our advanced equipment.
Quick glance at the process of Cold Chamber Die Casting:
• Aluminum is liquefied or melted by a furnace.
• Then, liquefied or Molten aluminum is poured into the die cast cold chamber.
• The plunger pushes the aluminum into the die cavity at high or low pressure.
• The mold opens and the plunger moves forward.
• The ejector pins push the die casting out of the ejector die, leading to the plunger's retracting.
• This processing method is commonly adopted for metals that are rapidly alloyed with iron at elevated temperatures.
• Frequent problems due to the melting of these materials in (partial iron) die casting machines occur.
• The cold chamber process is best suited for metal alloys with relatively higher melting points.