prepressing

The main factor of spring back density is prepressing pressure, next are compression time and compression number of times.The effect of moisture content was not significant.

回弹后密度的影响因子主要为压力，其为加压时间和压缩，含水率对板坯回弹密度的影响不明显。

In the compression moulding technology, preheat and prepressing procedures are added to improve the flowability of the bond and physical and mechanical properties of the product.

压缩模塑工艺中，增加预热、预压工序，提剂的流动性和产品的物理机械性能。