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What is Spiral Wedging?

Pugmill

A Pugmill is a machine for mixing and compressing a plastic clay. It mechanizes the handwork of wedging and kneading. Knives rotate on a central shaft and force the clay through a tapering barrel and out through a compressing nozzle. Pugging achieves some mixing of clay consistency but is more important for its effect upon compression and de-airing. Compression improves the strength and thus workability of a clay.

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