Protection against cooling lubricant
Liquid separator from Schmalz keeps pumps dry
Anyone clamping with a vacuum during CNC machining must protect the pump from cooling lubricant. The NLS liquid separator from Schmalz separates the cooling lubricant and returns it to the running process - without interrupting the vacuum.
Vacuum clamping minimizes distortion and enables five sides to be machined in one clamping operation. The use of cooling lubricants poses a challenge: If these get into the vacuum generator, they can cause serious damage. Schmalz has developed the NLS liquid separator to reliably separate liquid, dirt and chips beforehand. Located between the pump and clamping device, it is integrated into the machine control system via a network module. This means that the specialist can operate the NLS directly and conveniently via the milling machine's HMI module.
The Schmalz solution works with two chambers. There is a permanent vacuum in the upper chamber. The valve to the lower chamber is open from the start and the liquid collects there. When the lower chamber is full, the valve is closed by overpressure and the lower chamber is emptied. The collected cooling lubricant can then automatically flow back into the machine process via a hose.
The system permanently monitors the fill level and - with the help of a digital switch with IO-Link function - the vacuum, thus ensuring clamping during machining. In this way, the NLS ensures that the pump can constantly generate and maintain a high vacuum level in the system, even when running for several hours or days.
The NLS is the successor to the Vacuum Operation Center VOC. Compared to this, it is significantly more compact. It is compatible with every Schmalz pump and is suitable for the initial equipment of CNC processing machines with vacuum supply. The product is suitable for OEMs and machine manufacturers.
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