JPS5841886B2 - How to collect cutting oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering cutting oil attached to chips, cutting waste, or press scraps used during cutting.

Conventionally, as a method of recovering used cutting oil attached to chips, cutting waste, or press waste, the chips, cutting waste, or press waste are loaded into a centrifugal separator, and the cutting oil is centrifuged and recovered. However, since this device had to be automated, it was complicated and large, requiring space for a wide installation, and the centrifugal separator was expensive and difficult to handle.

For this reason, remote separators were rarely used, even though they were acutely aware of their necessity.

The present invention has been provided in view of the above circumstances, and its embodiments will be described in detail. Chips, cutting waste, or press waste with cutting oil attached are introduced into a net conveyor or a screw conveyor with a large drainage capacity, A pressure water injection device installed at the top of the conveyor injects high-pressure water onto the chips, cutting waste, or press scraps that are gradually moving on the conveyor. A water storage tank is provided to receive the oil-water mixture from which the oil has been forcibly removed by impact force, and an oil-water separator installed in the storage tank uses the difference in specific gravity to collect oil from the upper part, and the water in the lower part is recycled and re-added. Press and reuse repeatedly.

In addition, when high-pressure water is injected, low-pressure water is used in conjunction with the water to flow down into the water tank, and if a detergent that is insoluble in oil is added to the water, the oil separation effect can be promoted. The oil removal effect can be promoted by using water, and the removal effect can be further promoted by using high pressure water to which the detergent has been added and heated.

Since the method of the present invention is configured as described above, cutting oil can be recovered very easily and reliably using water as a medium.
Because it can transport clean chips, cutting waste, or press scraps, it is clean without contaminating the transport machinery, etc., there is no risk of workers getting dirty during handling, and it does not cause pollution because the water used does not flow into the sewer etc. There is no risk of explosion, and there is no danger of explosion because chips, cutting waste, or press scraps that are not resistant to adhesion of cutting oil can be thrown into the blast furnace.

It should be noted that although some water may adhere to chips, cutting waste, or press scraps, since they dry naturally, there is no adverse effect when they are put into a blast furnace.

It is also possible to use pressurized air instead of high-pressure water injection, but there is a risk that the cutting oil will be dispersed, worsening the working environment, and there is also the risk of ignition and explosion. The best method is to remove the cutting oil as a medium, and oil-water separation has the advantage that the cutting oil can be almost completely recovered.

Furthermore, by spraying high-pressure water with oil-insoluble detergent dissolved in it, the synergistic effect of the spray pressure and cleaning action reliably cleans chips, cutting waste, or press waste, and efficiently recovers cutting oil. It can be done.

As described above, the method of the present invention is an excellent and useful invention that allows cutting oil to be easily and reliably recovered by using a simple device.

Claims (1)

[Scope of Claims] 1. Injecting high-pressure water onto chips, cutting waste, or press-cutting waste to which cutting oil has adhered, and causing the oil to separate and flow out together with the high-pressure water,
Recovery of cutting oil, characterized in that the oil-water mixture is introduced into an oil-water separation tank, separated from water, and the cutting oil is recovered, and the water is circulated and re-pressurized for repeated use to prevent oil from leaking to the outside. Method. 2. The cutting oil recovery method according to claim 1, characterized in that an oil-insoluble detergent or the like is dissolved in high-pressure water. 3. A cutting oil recovery method according to claim 1 or 2, characterized in that the injected high-pressure water is heated to facilitate the removal of the oil. 4. A cutting oil recovery method according to claim 1, 2, or 3, characterized in that the oil is separated by injected high-pressure water, and low-pressure water is also used to cause the oil to flow down.