One valve to control 2 cylinders? That seems to be making it harder to control since there will be volume changes in the circuit while the second cylinder is in motion and no back pressure that will maintain the mold closing cylinder pressure.
Also, where you have the flow control, once pressure is coming up in the injection cylinder, the pressure will equalize on both sides of that valve after a slight delay. This is where a sequencing valve can help. It acts like a relief, but instead of internal drain, the drain can feed the down stream circuit.
Maybe you could look at the control valve and draw up its configuration, then label the ports in your drawing?
I found a couple interesting examples in my Fluid Power Directory. The first one looks similar to what you have done. The second is just what you expect.
DC
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Last edited by One of Many; 10-30-2007 at 10:04 AM.
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