21
2023
-
04
Treatment of shrinkage cavity at inner gate of film coated Sand casting low-carbon steel castings
How to deal with the shrinkage cavity at inner gate of the film covered Sand casting low-carbon steel castings?
1、 Shrinkage holes, strengthen the exhaust of the middle sand core, and try adding risers proportionally.
2、 Stacked box design, with a total of 6 boxes and 5 in each box. If this is the case, the gas source after pouring in the stacked box is very small, and most of the gas will be directed towards the inner gate. Can you connect the 5 pieces in each box and find a common gas needle for the part?
3、 The cross-sectional area of the inner gate is too large, which causes the inner gate to pull the molten steel of the casting backwards. The long strip shape of the inner gate should meet the requirements, and it should be small enough to meet the filling time. The length of the inner gate is not considered, and the width should be as narrow as possible.
4、 Stacking casting should ensure that the molten steel enters the mold cavity layer by layer from bottom to top and is fully filled. Using pouring instead of pouring, it is necessary to ensure the feeding effect of the gate inside the horizontal gate, at least not to cut off the feeding effect of the straight gate on the casting. Unfortunately, this stacked casting precisely loses its shrinkage and forms shrinkage cavities.
No public
Douyin
Nantong Maylead Technology Co., Ltd.
Coated sand contact: 86-15962297575 (Xu Tao)
Hydraulic hose contact: 86-13646245739 (Zhang Jianwei)
E-mail: info@maylead.com.cn
Add: No. 389 Zhuhai Road, Binjiang Street, Economic Development Zone, Haimen City, Jiangsu Province
copyright © 2023 Nantong Maylead Technology Co., Ltd.