Fixed die push-out device

Abstract

The invention discloses a fixed die push-out device. The fixed die push-out device comprises a fixed die. The fixed die is provided with a push rod. The push rod is provided with a plurality of ejecting ends. Springs are arranged at the ejecting ends and used for fixing the push rod to the fixed die. The ejecting ends and the fixed die are in a pressed and sealed state. A delay groove is formed in the power end of the push rod. A driven rod shaft is in sliding connection in the delay groove and is fixed to a driven rod. The driven rod is connected to a drive rod through a gear and rack combination. The drive rod is fixed to the fixed die, and the drive rod moves along with the fixed die. The fixed die push-out device which utilizes die sinking force, and is compact in structure, simple and efficient is provided to achieve the purpose of pushing a casting out of the fixed die according to the casting shape, the technology requirement and other reason requirements.

Description

technical field [0001] The invention relates to the field of die-casting mold ejection mechanisms, in particular to a fixed mold ejection device. Background technique [0002] Die casting is a metal casting process characterized by the use of mold cavities to apply high pressure to molten metal. Molds are usually machined from stronger alloys, a process somewhat similar to injection molding. In each cycle of die-casting, the plastic parts must be accurately released from the die cavity or the core. The device that completes the ejection of the plastic parts is called the demoulding mechanism, also often called the push-out mechanism. The ejection mechanism is generally composed of three major components: ejection, reset and guidance. [0003] Under normal circumstances, a reasonable mold design should be that the casting is separated from the fixed mold when the mold is opened, wrapped tightly on the movable mold, and returned together with the movable mold, and the castin...

AI Technical Summary

Problems solved by technology

[0003] Under normal circumstances, a reasonable mold design should be that the casting is separated from the fixed mold when the mold is opened, wrapped tightly on the movable mold, and returned together with the movable mold, and the casting is ejected through the ejector pin on the ejector mechanism on the side of the movable mold. However, for some castings with special geometric shapes, the surface area of ​​the punch is much smaller than the area of ​​the die, so that the tightening force is too small to ensure that the casting is tightly wrapped on the punch and stays in the fixed mold when the mold is opened. It is necessary to design a push-out mechanism, relying on the thrust of the push-out mechanism to separate the casting from the fixed mold

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