Meaning
High-conductivity beryllium-free copper alloys provide superior thermal dissipation in injection moulding inserts compared to standard tool steels. Designers specify ampcoloy 940 copper alloy when rapid heat removal is necessary to shorten cycle times or eliminate hot spots in complex geometries. The material combines high electrical and thermal conductivity with sufficient hardness to withstand the mechanical stresses of a production run.
This balance of properties makes it a standard choice for cores and cavity inserts in high-performance tooling.
Thermal Efficiency
Rapid heat transfer allows for more uniform cooling across the part surface. Using ampcoloy 940 copper alloy in cores or thin ribs prevents the localized heat buildup that causes sink marks and warping. Efficiency gains of twenty percent are common in cycles where cooling is the limiting step.
Mechanical Hardness
Structural integrity remains stable at the elevated temperatures common in moulding engineering resins. Although ampcoloy 940 copper alloy is softer than hardened steel, it maintains a Rockwell hardness sufficient for high-volume production without deformation. Tooling engineers often plate the surface to increase resistance to abrasive resins.
Wear Profile
Friction and abrasion eventually degrade the surface. Surface treatments extend the life of ampcoloy 940 copper alloy. Correct maintenance ensures the insert retains its dimensions.
