Ringed plunger tip with holes
The patented Copromec plunger tip is designed for cold chamber high-pressure die casting machines (aluminum and magnesium). The Copromec innovation exploits the energy of molten aluminum to push the ring against the shot sleeve inner walls.
The molten aluminum flows through the holes on the plunger tip head under the ring where it solidifies, pushing the ring angainst the shot sleeve inner walls. The thinner the ring becomes, the more aluminium can flow under it, compensating for the wear of the ring.