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Casting information --optical module

September 25, 2024
1.Casting information 
Casting name: optical module
casting requirement:surface requirements
casting process:
Die Casting machine tonnage:250
punch diameter mm:50
alloy material:High heat transfer aluminium
average wall thickness mm:1.2
2. Casting problem
casting shrinkage,indentation,
see the defect position picture.
3. Casting pictures
PIC 1 front top viewCasting pictures
4. Casting analysis
The surface shrinkage of the product is caused by uneven wall thickness, rapid transition, and asynchronous cooling process. It usually occurs at the edge of the step where the rib bone position and the wall thickness difference are too large. This case is because the product has a step with a large wall thickness difference, and the rapid transition, it is easy to cause shrinkage and indentation on the position of the edge of the step.
5.Improving measures
Chamfer on the defects position of the edge of product step,in order to have a buffer transition for that step with big wall thickness difference.
Improving measures
pic 5 chamfer diagram
6.Tips
For shrinkage
shrinkage position will lead to metal liquid separate from the cavity .This will greatly affect the heat conduction at this position, leading to a vicious cycle(Local high temperature).
 
 
 
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Mr. Logan

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