Diecasting apparatus

A vertical diecasting apparatus comprising a diecasting cavity, a vertically arranged injection cylinder having its upper end in communication with said cavity, a melt chamber cylinder coaxially located below said injection cylinder and having an inner diameter substantially the same as said injection cylinder, a base member adapted for vertical movement, means for moving said base member, said melt chamber cylinder being secured to said base member for movement therewith toward and away from said injection cylinder, so that when said base member is lowered, the melt chamber cylinder is spaced apart from the injection cylinder to provide a space for supplying the material to be melted, a movable plunger adapted to pass through said melt chamber cylinder and said injection cylinder to form a melt chamber defined by an upper surface of said plunger and an inner surface of said melt chamber cylinder, said melt chamber cylinder in abutment with said injection cylinder and said cavity all forming a hermetically closed space, and heating and melting means comprising a high frequency induction coil and a resistance heating body arranged about said melt chamber cylinder for melting a solid material inserted therein to be injected into said cavity when melted, said resistance heating body arranged between said coil and said melt chamber for preheating said melt chamber to mitigate rapid heating by said coil, wherein said melt chamber is a ceramic material composed of at least one material selected from high grade furnace materials of alumina, silica and zirconia ceramics and carbide and nitride materials.