"Gravity Die Casting. A permanent mould casting process, where the molten metal is poured from a vessle of ladle into the mould, and cavity fills with no force other than gravity, in a similar manner to the production of sand castings, although filling cn be controlled by tilting the die."
Sometimes referred to as Permanent Mould, GDC is a repeatable casting process used for non-ferrous alloy parts, typically aluminium, Zinc and Copper Base alloys.
The process differs from HPDC in that Gravity- rather than high pressure- is used to fill the mould with the liquid alloy.
GDC is suited to medium to high volumes products and typically parts are of a heavier sections than HPDC, but thinner sections than sand casting.
There are three key stages in the process.
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Gravity Die Casting
How to properly use and install pressure reducing valve
Gas liquefied petroleum gas from high pressure into low pressure work is completed by the pressure reducing valve, in addition to decompression, but also has the function of stabilizing the outlet gas pressure, should pay attention to the use: 1, reducing valve and hose interface to Close connection, preferably tied with wire or clamp with tube clamp. 2, on the pressure reducing valve, you must first check the pressure reducing valve inlet seal is deformed off. 3, pressure reducer and angle valve is connected with the anti-buckle. When using the pressure reducer, hold the valve body with one hand and align the handwheel with the outlet thread of the angle valve. Use the other hand to rotate the handwheel counterclockwise until the pressure reducing valve does not shake left and right. 4, when changing the bottle to remove the pressure reducer, cylinder angle valve must be closed before unloading. 5, after the relief valve is removed, should be gently on the hob or other dry items, do not readily fling the floor, so easy to make pressure reducer damage, but also easy to make the inlet seal off 6 When the pressure reducer fails, you should ask the professional and technical personnel to repair. Do not disassemble yourself.