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Title: Heavy Duty Switchgear From Copper Alloy Castings
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Blog Entry: Heavy Duty Switchgear From Copper Alloy Castings Low friction properties and good wear resistance Journals and other solid bearings, worm gears, automotive gear selector forks and many other components that require low friction and good wear resistance are typically made by Copper Alloy Castings . Copper alloy casting shell casting The shell molding process using synthetic thermosetting resins mixed with advanced silica sand has been developed over the past 50 years and is a method of producing sand castings with much smaller tolerances. Of course, it is a machine molding process. The pattern sheet used in this process must be metallic and capable of withstanding temperatures of 250-300 °C. The amount of "stretching" required for these patterns can be greatly reduced, and the tapping of the pattern is not used to eject the mold from the pattern sheet. High conductivity and thermal conductivity Cast copper itself has a conductivity of 90% IACS or higher and has many electrical applications in heavy duty switchgear, connectors, electrode holders and motors. There are also many thermal applications in heat exchange equipment and heat sinks. Most other cast alloys have a conductivity of 15% to 20% copper, which is much larger than cast iron or stainless steel and is still suitable for many electrical and thermal applications. In the last connection, it is recommended to consult the contract foundry within the tolerances of the shell molded castings, as tolerances of 0.003 inches (≈ 0.1 mm) can be maintained in certain sizes. This is not possible in all dimensions of the housing moulded casting, especially where these dimensions span the mould's connecting line.