Fixed mold ejection structure of die casting machine

Abstract

The invention discloses a fixed mold ejection structure of a die casting machine. The fixed mold ejection structure comprises a fixed mold plate (1) and a fixed mold (2). The fixed mold (2) is fixed onto the fixed mold plate (1). The fixed mold ejection structure is characterized in that a fixed mold ejection mechanism is arranged on the fixed mold (2) and can be driven by a plurality of groups ofnitrogen springs (3) which are fixedly positioned on the fixed mold plate (1), an individual gas connecting pipe (4) is connected with each group of nitrogen springs (3), and individual manual control valves or electric control valves are arranged on each gas connecting pipes (4). The fixed mold ejection structure has the advantages that movable molds are simple in structure, the fixed mold ejection structure is provided with the nitrogen springs, the fixed mold ejection structure and the die casting machine are controlled in an online manner, and accordingly the fixed mold ejection structureis high in automation degree; the locations of driving mechanisms do not need to be changed, and requirements of different molds can be met by optional combination control.

Description

technical field [0001] The invention relates to the field of die-casting machine molds, in particular to a die-casting machine fixed die ejection structure. Background technique [0002] Die casting mold is a big category in mold. In recent years, with the rapid development of my country's automobile and motorcycle industries, the die-casting industry has ushered in a new period of development. But at the same time, higher requirements are put forward for the comprehensive mechanical properties, life and mold structure of die-casting molds. [0003] Die casting is a precise production process, however, there are many factors that can affect the final dimensional variation of die castings. Dimensional changes can be divided into linear changes (mainly caused by shrinkage), movement dislocation between molds, parting line, casting and mold warpage, die-casting parameters, core-pulling and drafting angles, etc. But one thing must be remembered that the final dimensional chan...

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Problems solved by technology

[0004] In the prior art, all die-casting machines only have a movable mold ejection mechanism. When many products need to be ejected from a fixed mold, they find a way on the mold: such as adding a spring behind the fixed mold plate, ejecting an oil cylinder, or ejecting a movable mold. Increase the undercut, or force the product to stay in the movable mold by the force of the slider; these methods are effective, but they often make the mold structure more complicated, the thickness becomes thicker, and the production stability is not good

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