Mould with float mould core structure

The utility model discloses a mould with simple operation and with float mould core structure. The mould comprises a mould core, a male mould, a female mould. A positioning sleeve, a guide post, a supporting plate, a discharging plate and a spring, wherein the guide post is fixed on a frame; the supporting plate is sheathed on the guide post, and can slide upwards and downwards along the guide post; the spring which can cause the supporting plate to slide upwards along the guide post is arranged on the guide post; one end of the mould core is vertically arranged on the supporting plate, and is fixed by the positioning sleeve; the male mould and the discharging plate are arranged on a bracket which can be lifted up and fallen down, and are positioned at the upper part of the mould core; the female mould which is matched with the male mould is fixed on the frame, and is positioned below the mould core. The mould of the utility model effectively solves the problem of low strength of a mould core of the general circular pipe punching mould, and extends the service life of the mould. The utility model is especially suitable for punching and processing for circular pipes with thin walls.