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The utility model relates to blow mould technology field, and disclose a mould for blowing, the mould for blowing, including bottom plate, fixed mounting has mounting bracket on the bottom plate, be provided with mould closing subassembly on the mounting bracket, the mould closing subassembly includes hydraulic device, fixed mounting has hydraulic device on the mounting bracket, hydraulic device piston end fixed mounting has one end of slide rod, the other end fixed mounting has limit cylinder of slide rod. The mould for blowing, in order to make the device prolongs mould service life, through being provided with mould closing subassembly, the component cooperation hydraulic device promotes slide rod and drives installation box to move, makes the forming groove of two groups of half cylinders with blow molding groove accurate butt joint, ensures that the plastic part contour is complete, and the limit rod is through the limit plate sliding, cooperates limit round board and restricts the mould closing stroke, avoids half cylinder rigid collision, spring assists the thrust when mould closing, provides compression energy storage when opening mould, shortens the opening mould time.

The application relates to the field of die-casting molds, in particular to a three-plate two-stage runner die-casting mold and method, which comprises a static mold plate, a middle plate is movably arranged on the left side of the static mold plate, a movable mold plate is arranged on the left side of the middle plate and matched with the middle plate, a runner groove is arranged on the right side of the middle plate, and a runner sleeve matched with the runner groove is fixedly connected to the middle part of the static mold plate. The three-plate two-stage runner die-casting mold is used in cooperation with a material handle limiting mechanism and an adjusting mechanism, in the mold opening process, a small-angle deflection of a limiting ring and a positioning rod is generated through cooperation of a driving lever and a wedge-shaped plate inclined surface, the material handle is subjected to a circumferential torsion force while bearing axial stretching, the runner neck is neatly and quickly disconnected, tearing of the runner, deformation or strain of the product caused by simple axial pulling is avoided, the product breakage is smooth and the contour is complete, and therefore the appearance quality and the structural strength of the product are effectively improved.