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2023.1.31
Cold chamber die casting and hot chamber die casting are two preferred metal casting processes, let’s talk about the definition, alloys, advantages, equipment and some tips for cold chamber die casting.
Cold chamber die casting is a type of metal casting process where molten metal is manually ladled into a shot sleeve that is separate from the die, and then injected into the die by a plunger. The process is used for casting metals with high melting points, such as aluminum, brass, and magnesium.
Alloys Used in Cold Chamber Die Casting
The choice of the alloy depends on the desired properties of the final product, such as strength, conductivity, and corrosion resistance. The compatibility of the alloy with the die material must also be considered to prevent corrosion and ensure a long service life for the die. Cold chamber die casting can be used with a variety of alloys, including:
– Aluminum alloys: 6061, A380, and 356
– Magnesium alloys: AZ31B, AM60B, and WE43
– Copper alloys: C83600, C84400, and C86500
– Brass alloys: C36000, C37700, and C38500
– Lead alloys
– Zinc alloys.
Advantages of Cold Chamber Die Casting
Suitable for casting metals with high melting points
Can produce complex shapes and high dimensional accuracy
Good surface finish
Can handle high injection pressures
High production rates
A versatile process that can cast a wide range of alloys.
A cold chamber machine is a type of die casting machine used for the cold chamber die casting process. It consists of a shot sleeve, a plunger, a melting furnace, and a machine frame. The molten metal is manually ladled into the shot sleeve, which is then pressurized by the plunger to inject the metal into the die. The machine frame holds the shot sleeve, plunger, and die in place, and controls the injection process. Cold chamber machines are typically used for casting high melting point metals, such as aluminum, brass, and magnesium.
Here are some tips for cold chamber die casting:
– Ensure proper temperature control of the molten metal to avoid defects
– Use high-quality, well-maintained dies to ensure consistent casting quality
– Use the correct shot sleeve size to prevent metal overflow
– Monitor the injection pressure to avoid defects caused by over or under-filling
– Use a casting alloy that is compatible with the die material to prevent corrosion
– Maintain proper lubrication of the shot sleeve and plunger to reduce wear and prolong the life of the machine.
– Regularly check and adjust the machine parameters to ensure optimal performance.