Aluminum Die Casting Terminology
Aluminum — One of the most commonly used die casting metal material with lightweight, cheap cost, and silver color(raw material color).
Aluminum Die Casting Process— A metal die casting process that normally requires to use a cold chamber die casting process that raw material is molten in an furnace which is set aside of die casting machine, then it’s poured into die casting machine by a ladle. After that, the molten material will be transferred into mold tool where the material cools and solidifies to become the desired die casting parts.
Castability — The capability of a material that be used for die casting process.
Die Casting Machine: A electro-mechanical device for die casting process that particularly consists of mold clamping system, material melting, material injection, and part ejection system. For different melting system, a die casting machine can also divided into cold chamber machine and hot chamber machine. Normally aluminum die casting process use a cold die casting chamber machine; zinc and magnesium use hot chamber machine.
Cold Chamber Machines— Because aluminum has a relative higher melting point, It particularly requires the raw material should be pre-melted by furnace that set aside of die casting machine, instead of material is melted inside a die casting machine.
Die Casting Mold Tool: A steel tools where the molten material cools and solidifies to form a die casting part. It’s made of hardened steel(HRC48°C~ HRC52°C), with two different plates as core side and cavity side, sliders(if needed).
Mold Core — A part of mold plate where is the outstanding feature of same shape as final die casting part. It normally attached with ejection system to fall of part.
Mold Cavity — A part of mold plate where is the recessed feature of same shape as final die casting part. It normally connects with gate and runners.
Clamping Force —It is used to keep mold tool closed tightly when material injection process. The force is originally generated by the hydraulic cylinder of die casting machine.
Parting Line —It looks like a small flash line that left by the fitting area of mold core and cavity after die casting process.
Draft — A linear angle existing in the cavity and core side of mold tool so as to enable die casting part depart from mold tool easier.
Slide — A movement structure in the mold tool to realize the special features that a normal cavity and core can’t form.
Overflow — It’s an additional runner attached to die casting part, so as to filter some material defects like bubble or combined material.
Runner — The material flowing channel in the die casting mold starts from sprue to die casting part.
Sprue — A round hole in the die casting die mold that the molten metal starts from it until die casting part.
Vent — A small space between the fitting surface of cavity and core, used to release high pressure and air when material injection process.
Rib — A thin wall that used to enhance part strength.
Finishing — It refers the surface treatment to meet using requirements, like electro-plating, anodizing, powder coating, printing, etc.
Shrinkage— A small recessed features from part surface when molten material cools and solidifies.
Shrink Mark— The recessed mark that left by material shrinkage.
AQL— A quality acceptable standard for quality control. It’s originally used in US military system.
CPK — It’s a quality control index that generated by statistic process of a series inspection data. By checking CPK data, we can visually observe our manufacturing stability and tendency.