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发表于 2021-1-7 23:07:40
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八爷好
今天读了一点压铸机。cold chamber hot chamber. lock mechanism mechanical locking or hydraulic locking. Locking force the most important parameter. If not locked tight the separation tolerance will be big. Slightly system with guding to reduce dies shift.
For the pressing mechanism plunger is used with cylinder. To produce high quatily casts, the speed of plunger must be assured. Al si alloys die casting can?be divided into 3 sections. In beginning section, speed should be slow to prevent liquid metal sputtering. in second section, when plunger passed pouring hole, gradually accelerate to .8 .9ms until liquid metal reaches ingot. In moulfing filling. abrupt accelerate to 6ms or more. Before final filling there should be a braking speed then a higher speed to end up. Also regulation of pressure is possible. |
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