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Casting information--surface requirement

September 24, 2024
1.Casting information
Casting requirement:surface requirement
Casting process:
Die Casting machine tonnage:280T
alloy material:L108
casting size mm:Ø70
2. Casting problem
there is blister in E-plating,see the defects picture.
3.Casting picture
pic 1 front top viewCasting picture
4.Casting analysis
The casting is a ring shape, and a large area of through holes in the middle is the main  reason for forming obstacles. Electroplating’s blister is caused by defects such as cold lap and flow mark at forming end.
5.Improving measures
Improving measure 1: Add a overflow and ejector pin on the through hole,which is  in the middle of the product, and discharge air during the  ejector pin’s gap.
Improving measure 2:Making bridge on the through holes in the middle of products to flow material, so that the metal flow is synchronously filled to the bad position. 
pic 6 bridge diagram
6.Tips
For overflow
The number of overflow should be reduced as much as possible for the single filling flow state of liquid metal junction, and adding overflow on the filling path will easily affect the filling flow state. In this case,  do not add the overflows on the two sides and try to avoid connecting with other overflows.
 
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