Liquid injection extrusion device

The utility model provides a liquid injection extrusion device which comprises a base, one side of the base is fixedly connected with a monitoring box, one side of the base is welded with a hydraulic rod, one side of the hydraulic rod is fixedly connected with a fixing block, and one end of the fixing block is in threaded connection with a fixing plate. According to the liquid injection one-seal extrusion device, through the arrangement of a fixed rod, a first extrusion plate, a first reset spring, a first limiting block, a movable plate, a second limiting block, a spring, a sliding groove, a reset rod, a second extrusion plate and a second reset spring, when the liquid injection one-seal extrusion device is used, firstly, a mold is installed in the limiting groove, and then the fixed rod is pressed; when a fixed rod enters a groove formed in the mold and the mold needs to be replaced, a first limiting block can be released to release limiting of the fixed rod only by pressing a reset rod, and then a second r