Mandrel structure and manufacturing method thereof

A mandrel structure and a manufacturing method thereof are disclosed. The mandrel structure for use in manufacturing a fiber reinforced resin vessel by a filament winding process, includes: a shaft having a pair of axial ends configured to be supported by a drive unit; a mandrel having the shaft passed therethrough; and a pair of fittings having the shaft passed therethrough and projecting axiallyfrom respective axial ends of the mandrel. The mandrel is formed as a hollow shell made of a water-soluble material, and includes a pair of shaft holes receiving the shaft therein, and a receiving recess formed in a part of the mandrel surrounding each shaft hole and configured to engage the corresponding fitting in a rotationally fast manner. 芯轴结构及其制造方法。一种在通过细丝缠绕工艺制造纤维增强树脂容器中使用的芯轴结构，其包括：轴，该轴具有构造成由驱动单元支撑的一对轴向端；芯轴，所述轴穿过该芯轴；和一对配件，所述轴穿过所述一对配件并且所述一对配件从所述芯轴的相应轴向端轴向伸出。所述芯轴形成为由水溶性材料制成的中空壳，并包括：一对轴孔，这一对轴孔中接纳所述轴；以及接纳凹部，其形成在所述芯轴的围绕每个轴孔的部分中并构造成以快速旋转的方式与相应的所述配件接合。