LINKAGE MECHANISM BETWEEN LIFTING AND BILATERAL POSITIONING OF BOTTOM DIE

An elevating and bilateral positioning linkage is provided for a bottom mould. The linkage comprises an elevating assembly and a positioning assembly. The elevating assembly comprises an elevating rod, the bottom mould is mounted on an upper end of the elevating rod, and the elevating rod is driven by the driving assembly to elevate. The driving assembly comprises a rotation shaft rotatably disposed on the machine frame, a cam fixedly connected on the rotation shaft, and a sliding part mounted on the elevating rod, a guiding groove is opened on the cam, and the sliding part is inserted into the guiding groove. In the course of rotation of the rotation shaft, the contact position of the guiding groove with the sliding part rises or descends. The positioning assembly comprises a plurality of sliding blocks, multiple swing members for driving the movement of the sliding blocks and a rotation member fixed on the rotation shaft for controlling the swinging of the swing members. The linkage has at least work positions, in the first work position, the plurality of sliding blocks are inserted between the bottom mould and the machine frame and contact against the bottom mould, in the second working position, the sliding blocks are separated from the bottom mould and the bottom mould moves towards the machine frame. In the invention, the linkage of the bottom mould elevating and positioning is achieved by means of a power source, this will reduce the volume of the whole device.