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"Submerged High-pressure Washing Machine"Q&A

Q1 What are the features of the Submerged High-pressure Washing Machine?

The Submerged High-pressure Washing Machine has the ability to carry out chip removal through submerged spaying using a high-pressure and small-flow rate jet. Compared with low-pressure and large-flow rate submerged washing types, the Submerged High-pressure Washing Machine is superior in terms of its ability to carry out chip removal tasks.
In addition, since the utilized spraying nozzle is able to perform high-level submerged washing, it has a special shape. Brick erosion tests have shown that the nozzle obtains an erosion result that is approximately 10 times greater than conventional nozzles.


Q2 Why is washing done under water?

When a water jet is sprayed under water, it meets resistance from surrounding water, and this greatly reduces the power of the jet.
However, submerged spraying has the result of creating cavitation between the jet and its surrounding water.
Submerged washing is done in order to use the washing power created by the cavitation.


Q3 What is characteristic of the nozzle used for submerged spraying?

The nozzle is called a "Horn-type Nozzle" and it has a tapered shape with its outlet spreading outward. Cavitation is effectively produced through water sucked into the tapered part, and this increases washing effectiveness. 
Figure: Horn-type Nozzle 
■ The meaning of cavitation bubble cloud
...This refers to the concentration of micro-bubbles produced by cavitation.
Spaying action as shown by high-speed camera
The white-colored cluster is the cavitation bubble cloud.


Q4 How is washing done?

In general, it is carried out by the following process:

Workpiece loading → Rapid water supply → Submerged washing → Rapid water discharge → Rinsing → Draining → Workpiece unloading


Q5 What type of work is this washing applicable to?

  1. Chip removal for general-purpose workpieces, farm equipment, and engine parts for two- and four-wheel vehicles
  2. Chip removal for hydraulic and pneumatic valve parts
  3. Molding sand removal for precision casting parts