Tread shaping drum

The utility model provides a tread shaping drum. The tread shaping drum comprises a main shaft assembly; the drum tile assembly is arranged around the main shaft assembly and can move in a collapsible mode in the radial direction relative to the main shaft assembly so as to position a tire; the driving lead screw is arranged on the main shaft assembly and is in driving connection with the transmission mechanism, and the driving lead screw rotates to drive the drum tile assembly to expand and contract through the transmission mechanism. The tread shaping drum disclosed by the utility model solves the problem that a tire is not tightly attached to a shaping drum in the prior art. 本实用新型提供了一种胎面定型鼓，包括：主轴组件；鼓瓦组件，鼓瓦组件环绕主轴组件设置，并能够相对主轴组件沿径向方向可涨缩地移动，以定位轮胎；驱动丝杠和传动机构，驱动丝杠设置在主轴组件上并与传动机构驱动连接，其中，驱动丝杠转动以通过传动机构带动鼓瓦组件涨缩运动。本实用新型的胎面定型鼓解决了现有技术中的轮胎与定型鼓贴合不严的问题。