Abstract: A feeding sensor for die caster comprises a storage tank storing molten metal, a positioning member atop the storage tank, a feeding pipe connected to the positioning member and having one end passing through an opening of the storage tank and placed below a surface of the molten metal. A container of fixed volume is connected to another end of the feeding pipe and has a control valve and an air pump. A columnar supporting post has one end connected to the feeding pipe and another end connected to a weight sensor.

Abstract: A vacuum valve for die casing machine comprises a valve seat, a bottom die and a top die and a wavy lead-in runner between the bottom and top die. The bottom die has a vent hole and the top die has a feed-in inlet. The valve seat has an accommodating tank enclosing two gears, each gear engaged with one tooth rack. An induction rod is arranged on the tooth rack near the feed-in inlet and passing through an induction hole on the bottom die. A control rod is arranged on the tooth rack near the vent hole and passes through a valve hole on the bottom die. The control rod has a plurality of axial slots on one end thereof. The axial slots are initially exposed out of the valve hole and moved with the control rod to indent into the valve hole to seal the valve hole.