Rust is caused by moisture entering the inside of the tank. If a tank is located at the outer end of an injection molding machine, the tank is exposed to significantly higher temperature fluctuations between standstill & operation but also due to external influences such as open gates. If the air in the tank cools down, the moisture contained in the air condenses and settles on the walls inside the tank.
Even if the oil test results do not indicate water in the tank, rust may have already formed. This is because water droplets form, but they stick to the tank walls and do not drip into the oil.
An aeration dryer dries the air drawn in during the closing process of the injection molding machine, thus preventing moist air from entering the tank and condensing. In addition, the adsorber shows where the water is coming from by changing color. If the adsorber changes color from the bottom, the moist ambient air is dried when it is sucked in. If the adsorber changes color from above, the humid air inside the tank is dried. In this way, conclusions can be quickly drawn about the condition of the injection molding machine.
We recommend the VV-R series for use on hydraulic tanks of injection molding machines. The air flows through the adsorber and removes water from it. At the same time, the change in color of the silica gel from orange to green indicates the condition of the adsorber.
If the entire bed is discolored, the clamps on the aeration dryer can be opened and the contents replaced quickly and inexpensively.