Gravity Die Casting
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MRT are specialists in gravity die casting, with one of the most advanced manufacturing facilities in the UK foundry industry. MRT has optimised the productivity of its gravity die casting processes, shortening lead times, and resulting in lower costs.
Gravity Die Casting employs cast iron or steel moulds which allow aluminium and zinc castings to be produced more accurately and cheaply than with sand casting. Tooling costs of gravity casting are a fraction of those needed for pressure die casting. The rapid chilling gives excellent mechanical properties whilst non-turbulent filling ensures production of heat treatable gravity castings with minimal porosity.
MRT have a range of microprocessor controlled hydraulic gravity die casting machines, which mechanise movements of the die, increasing production rates, and improving consistency. The machines offer tilt pouring, and hydraulic movement on up to four axes. MRT also have facilities for producing sand cores to cast complex internal shapes.
The advantages of gravity die casting over sand castings include a better surface finish, and better mechanical properties, which occur due to the relatively faster cooling rates that occur in gravity die casting.