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Casting problem-Side wall machinecial hole

August 28, 2024
1.  Casting problem
Side wall machinecial hole defects
2. Casting photographs
Side wall machinecial hole defects
3. Cast analysis 
This mold is a circular cavity, filling the deep cavity with metal first, because the gate opening is too small to take into account the forming needs of the outer circular machining surface is the main reason for the flaw.
Cast analysis
4. Improvement 
Extend the runner and use the flow of the cavity edge to meet the forming of the cylindrical machining surface (since the filling Angle of the bottom melted metal is always filled first, the widening of the runner will not form a wrap).
5. Tips
About the bridge: 
If the product demand is higher, add a bridge, is more advantageous to the casting quality bridge (later die trimming) should be taken into account. If the bridge is not added in this case, there are many core occlusion, the flow pattern is difficult to control, and the quality and stability of the casting are difficult to ensure.
Occlusion scheme
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