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Gate position erosion

August 28, 2024
1.  Casting problem
Gate position erosion
2. Casting photographs
Gate position erosion
3. Cast analysis 
1. The pitting phenomenon on the surface of the eroded products near the gate is caused by the flow channel being involved in the gas, the speed of the gas entering the cavity at high speed through the gate is sharply reduced, and the gas is compressed and caused by an explosion impacting the mold.
2. Mold surface fatigue, tempering die maintenance is not timely.

4. Improvement 
1. Dynamic mode channel cross-sectional area optimization, and the flow channel cross-section is adjusted according to 1.1-1.2:1 to reduce the risk of gas involvement in the flow channel.
2. Change the mold that flat the pitting and then do tempering maintenance.

5. Tips
About flash and overflow material:
Some think that the overflow material will assist the exhaust, but it is best to return to relying on the pouring design to reduce the pore of the product. Because the flash and overflow material at the same time will have negative impacts: 1. Affecting production safety; 2. Leading to other defects; 3. Affecting the service life of mould; 4. Mold maintenance management costs increased, product quality costs also increased.
Contact Us

Author:

Mr. Logan

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8618157495020

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