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Casting information-- door and window accessory

September 23, 2024
1.Casting information
casting name: door and window accessory
casting process:
Die Casting machine tonnage:280
punch die (mm):70
alloy material: AlSi9Cu3
casting weight (g):250
2. Casting problem
It have blisters on surface,miss run,
see the defect position picture.
3.Casting pictures
 
pic 1 front top view
pic 2 back top view
Casting pictures
4. Casting analysis
1, the sectional area of the main runner is less than the cross-sectional area of the two runners. so that the runner will be involved in gas resulting in blister on product surface.
2, the front end of the flow gate has a waist-shaped perforation file flow, and the phenomenon of spacing filling when forming is easy to cause foaming on product surface.
pic 5 runner section diagram
5. Improving measures.
1. Increasing the sectional area of the main runner can reduce the risk of airflow in the runner
2, adjust the gate angle, expand the filling range. at the front end of the flow gate, to reduce the through hole by about 1 mm to let water flow. This avoids spaced filling and reduces the risk of foaming.
pic 6 runner section adjustment diagram
6.Tips
For deep cavity casting
If there is deep groove in cavity,the water left after spraying should be blow dried.The dryer blower should be as close to the deep groove as possible.
pic 7 material flow diagram
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