Demolding mechanism, demolding method and die-casting device

Abstract

The invention relates to the field of die-casting manufacture, in particular to a demolding mechanism, a demolding method and a die-casting device. The demolding mechanism comprises an ejector pin base plate and an ejector pin fixing plate, wherein the ejector pin base plate is connected with a die-casting machine ejector rod penetrating through a mold base plate, and the ejector pin fixing plate is connected with the ejector pin base plate and is provided with a first ejector pin and a second ejector pin in penetrating mode. The first ejector pin is in butt joint with the ejector pin base plate which is provided with an ejector pin ejector rod in butt joint with the second ejector pin. The ejector pin ejector rod comprises a first step located in a sink hole of the ejector pin base plate, the sink hole is provided with an ejecting face corresponding to a first step, a delay distance is reserved between the ejecting face and the first step, and the first step can move in the sink hole through the match between the ejector rod and the ejector pin base plate to enable the second ejector pin to be ejected out in delay mode. Therefore, the demolding mechanism, the demolding method and the die-casting device can achieve secondary ejection of a die-casting mold, the delay distance for the secondary ejection can be controlled accurately, and the defects of cracking, efficiency losing and ejection deformation of parts with deep cavities and thin walls can be effectively overcome.

Description

technical field [0001] The invention relates to the field of die-casting manufacturing, in particular to a demoulding mechanism, a demoulding method and a die-casting device. Background technique [0002] For the die-casting process, thin-walled castings have problems such as difficult molding, easy deformation and cracking when ejected, especially thin-walled deep-cavity castings. Aluminum alloy die-casting technology has been powerless to solve the casting problems of such castings, which greatly limits the development of aluminum alloy technology. And the development space of lightweight products. [0003] In the process of die-casting production, due to its shape or the need for production automation, one push-out of deep-cavity thin-walled castings often easily causes castings to deform, crack or fail to fall off automatically. It is necessary to use two push-out mechanisms or three push-out mechanisms to ensure smooth castings. demoulding. The traditional secondary e...

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Problems solved by technology

[0008] In view of this, the present invention provides a demoulding mechanism, a demoulding method and a die-casting device, which can realize the secondary ejection of the die-casting mold. Defects such as ejection deformation and crack failure of similar parts

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