Q
How do you decide the way of flow for aluminium die casting?
A
How do you decide the way of flow for aluminium die casting?
Depending on the size of the item cast in the mould, depending on the way the mould is opened and item extracted or the form of the item itself. 
You generally(absolutely always unless you are engineering a failure on purpose)want the flow to be of equal pressure and to reach the other wave of the flow in between two injection ports, regardless of how many ports there are.
You simply have to consider the fact that you are injecting a molten metal in a die mould and you want 100% of the mould to be equally filled out and have no air pockets in the product. 
Now you look at the size and shape of the mould and consider which flow and how the flow should go to fill out the size/shape perfectly.http://www.yitaicasting.com/products-list.htm

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