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Injection Molding Machine Repair

Author:Haifly Injection Molding Machine Date:2012-1-4 19:29:27

I was called in last week for a machine down at O’Ryan Industries, one of my customers. They have a Sumitomo SH220A hydraulic injection molding machine that quit working during mold set, or mold space adjustment.

Upon coming in and looking at the machine I determined that it had come to far forward and was jammed against the roller guide blocks. The limit switch had not activated which would have stopped it from crashing. I called Sumitomo and they told me which outputs to change  to  increase the pressure allowed to reverse away from the blocks. This did not work so instead I removed the guide blocks and reversed the machine hydraulics.  Afterwards the limit switches were adjusted to prevent this in the future.