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Casting information-- Front handle

September 12, 2024
1. Casting information
casting name: Front handle
requirements: Surface requirement
Casting process:
Die Casting machine tonnage:280T
punch dia (mm):60
alloy material: ADC12
casting size(mm): 60*150*25
average wall thickness(mm):1.5
2. Casting problem
cold lap on the bottom,see the defect  position picture.
3.Casting pictures
pic 1 front top view
Casting pictures
4. Casting analysis
This casting is a two-out aluminum alloy handle, the product appearance requirements are strict. Because the gate cannot be placed on the external A-side,and selected the current placement . The advantage of this arrangement is that the gate is on the B-side of the appearance, which is easy to polish the gate. The disadvantage is that such a horizontal span is large, due to the product structure, the gate filling angle is not easy to design, and the intersection area where the two gates are directly filled is not arranged with slag, resulting in poor product appearance.
Casting analysis
5.improving measures
The overflow port is set up at the product edge of the interchange (the front and rear die of the sky slide block), and the exhaust channel is led to the parting surface to make slag to absorb cold material.
The amount of metal flowing through the junction of products increases, and the cold material at the front end is absorbed and stored by slag . In this way, a better appearance can be get.
6. Tips
For cold lap on the bottom:
Whether increasing slag discharge can improve the bottom cold lap or not needs to be combined with the actual situation.
1, the roll is inside the product;
2, the slag position is not set at the filling end;
3, slag mouth thickness is not enough.
In summary of the above situation, the increase of slag volume may not get a good improvement.
 
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