The casting process design involves the process design of the part itself, the design of the gating system, the design of the feeding system, the design of the air outlet, the design of the chilling system, and the design of the special casting process. The process design of the part itself involves the design of the machining allowance of the part, the selection of the pouring position, the parting surface, the selection of the casting process parameters, the dimensional tolerance, the shrinkage rate, the draft angle, the correction amount, the negative number of the parting, etc.
The gating system is the channel that guides the molten metal into the mold cavity. Whether the gating system is designed reasonably or not has a great impact on the quality of the casting, and it is easy to cause various types of casting defects, such as: insufficient pouring, cold isolation, sand flushing, Slag inclusions, inclusions, sand inclusions and other casting defects. The design of the gating system includes the selection of the type of the gating system, the selection of the position of the inner Aluminum Alloy Sand Casting Parts gate and the determination of the section size of each component of the gating system.
In addition, the choice of gating system is also very important, so how to choose the correct gating system, for mechanized assembly line, mass production, in order to facilitate production and benefit the quality of castings, the inner runner is generally set at the parting surface of the mold , According to the casting position of the casting blank and the selection of the parting surface, the opening of the inner runner at the parting surface of the mold belongs to the “intermediate injection” pouring system. Liquid metal will inevitably contain a certain amount of “slag” during the pouring process. In order to improve the slag blocking ability of the pouring system, it is suitable to use a “closed” pouring system. In the casting process, the design of the casting process has a great influence on the quality of the casting product, but the choice of the selection method of the gating system cannot be ignored. The design of the feeding system is an engineering technology that reasonably designs the risers and subsidies to compensate for the liquid and solidified body shrinkage of the casting during the solidification process, so as to obtain a sound casting. The air outlet is used to discharge the gas in the cavity, improve the filling ability of the molten metal, remove the supercooled molten metal and scum that is first filled into the cavity, and can also be used as a sign to observe whether the cavity is full.
Tags: Aluminum Alloy Die Casting Parts, Custom Aluminum Products
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