Machine head opening and closing device for rubber extrusion tubular machine head during sheet production

The invention provides a machine head opening and closing device for a rubber extrusion tubular machine head during sheet production. The machine head opening and closing device comprises a support, the support comprises a front fixed plate and a rear fixed plate, the front fixed plate and the rear fixed plate are fixedly connected through at least two guide rods extending in the front-back direction, a movable plate capable of sliding along the guide rods is arranged on the guide rods, a driving device for driving the movable plate to slide along the guide rods is further arranged on the support, a machine head body of the rubber extrusion tubular machine head is fixedly arranged on the rear fixed plate, a core mold matched with the machine head body is fixedly arranged on the rear surface of the movable plate, stand columns used for supporting the front fixed plate are arranged at the bottom of the front fixed plate, rolling wheels are arranged at the bottom ends of the stand columns, the rear fixed plate i