A screw 4 is attached to the above fixture tensioner 2nd moving mode 21, the other end of which is connected to the fixed die I, and a worm 41 is attached to the driving end of the screw 4. A guide bar 12 is attached to the fixed die I, which is inserted into a blind hole set corresponding to the moving mode, and a shoulder is provided at the end of the guide bar 12. A stairway is provided in the opening of the blind hole to restrict the corresponding shoulder. The guide bar 12 initiates the movement between another guide device, for example a fixed die I and a movement pattern 2, in order to prevent deflection and the pattern opening process is more stable. The tie tensioner mandrel 5 is threaded to the second cavity through a motion pattern 2 and a second motion pattern 21, with the protruding end of the mandrel 5 extending into the cavity.