The Effects of time factors on the compactingprocess of foundry sands were seldom mentioned and reported.
型砂紧实过程中的时间因素的影响，以前很少有人研究过。
2
Analysis and comparing showed that vertical waste compactingprocess has more advantages in respects of technology and operation cost than other processes.
通过分析比较，认为竖直式垃圾压缩工艺在工艺技术上和运行费用上，较其它工艺具有一定优势。
3
The stress and strain of forming powder of wall ground tile in compactingprocess are analysed in this paper and several rheological models of forming powder are put forward.