A core-pulling extrusion mechanism for a die-casting mold

Abstract

The invention discloses a core-pulling and extruding mechanism for a die-casting mould. In a core-pulling mechanism, an extruding mechanism is arranged for a control point with higher demand on internal quality of casting; the extruding mechanism comprises an extruding hydraulic cylinder, an extruding core connecting rod, an extruding core and an extruding core sleeve; the extruding hydraulic cylinder is fixed at one end of a slide block; the extruding hydraulic cylinder is connected with an extruding piston rod; the extruding core connecting rod passes through the slide block; one end of the extruding core connecting rod is connected with the extruding piston rod; one end of the extruding core is connected with the other end of the extruding core connecting rod; the extruding core sleeve sleeves the exterior of the extruding core; the extruding core sleeve is fixed at the other end of the slide block. The core-pulling mechanism and the extruding mechanism of the core-pulling and extruding mechanism are excellently distributed and the acquired products are compact in interior, excellent in performance and free from shrinking defect, so that the interior quality in a lateral section of the casting is effectively increased.

Description

technical field [0001] The invention relates to the field of die-casting molds, in particular to a core-pulling extrusion mechanism of a die-casting mold. Background technique [0002] Die casting is a method in which liquid or semi-liquid metal is filled into the cavity of a die-casting mold at a high speed under high pressure, and is rapidly solidified under pressure to obtain a casting. The lateral parting core-pulling mechanism is the most commonly used mechanism in die-casting molds. When the casting has an inner concave or side hole that is different from the mold opening direction, which hinders the direct demoulding of the die-casting, the part with the side hole or side concave must be molded. Make a movable core. [0003] Specifically, if figure 1 As shown, when the mold is closed, the core-pulling hydraulic cylinder 7 fixed on the fixed template 26 through the cylinder frame 25 drives the core-pulling piston rod 8 to push forward, and the slider 11 and the first...

AI Technical Summary

Problems solved by technology

[0005] However, in this structure, due to the extremely fast filling speed of the liquid metal liquid in the cavity, the filling process is not stable, which intensifies the turbulent flow, causes splashing of the liquid metal, entrainment of gas, oxidation inclusions, etc., which will lead to casting There are quality problems such as shrinkage cavity and shrinkage porosity inside the molding position, and during the product molding process, the core is fixed by locking the slider with a wedge block, and it is impossible to further pressurize the molding hole to improve the internal quality of the molding hole

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