Why should a four-column hydraulic press
have an ejector cylinder? If you look closely, you will find that most of the four-column hydraulic press equipment is equipped with an ejector cylinder. Then, why should a four-column hydraulic press have an ejector cylinder? This is because many times our processed products need a component to push the product out of the mold, and at this time, an ejector cylinder needs to be installed.
The function of the ejector cylinder is very simple. Generally speaking, it is used for demoulding, and the workpiece is lifted from the die. However, the price of a four-column hydraulic press
with an ejector cylinder is more expensive than that of an ordinary four-column hydraulic press. Because the oil cylinder is an important part of the four-column hydraulic press, the cost of adding an oil cylinder is very high.
How does the ejector cylinder of the four-column hydraulic press work? The first step in the working process of the ejector cylinder is to eject the workpiece. The specific implementation is to press the ejector button after the return stroke of the master cylinder stops moving, and the corresponding 3 electromagnets are energized, of which 2 cartridge valves are opened, and 2 The hydraulic oil enters the lower chamber of the ejector cylinder through the valve cartridge, and the oil in the upper chamber flows back to the oil tank through the valve, and the workpiece is ejected. The second step is to return the ejector cylinder. First press the return button, the electromagnet is de-energized, the other electromagnets are energized, the cartridge valve is opened, the hydraulic oil enters the upper chamber of the ejector cylinder through the valve, and the oil in the lower chamber passes through the valve. The valve flows back to the tank, ejecting the cylinder back. When these steps are completed, the next step begins, and then a circulatory system is formed to maintain the continuous movement of the four-column hydraulic press.
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