MR. pOP CAP 1550

The Mr. Pop Cap 1550 allows the use of a soda ‘pop’ bottle as a pressure vessel for cutting fluid, or any other fluid really.

Why?

There are various mist coolant systems that use the Venturi principle to draw cutting fluid (coolant) from an open container of any kind to be sprayed out of a nozzle. The Venturi principle is clever, but requires relatively high air flow which tends to turn the coolant spray into a fog.

The way around this problem is to lightly pressurize the coolant. If the coolant is pressurized, it doesn’t need the Venturi effect to move to the nozzle, which means the air flow can be turned way down, or even off. Low air flow eliminates the fog. However, to pressurize the coolant, we need a pressure vessel.

Steel pressure vessels can be expensive and difficult to maintain. That’s where the pop bottle comes in.

Pop bottles can allegedly handle upwards of 200psi. I don’t know about that, but anywhere from 5-30psi feels about right for coolant delivery purposes, and 30psi is within the realm of normal life as a pop bottle. And we get several choices in size, like 20 fl oz or 2L, and they’re basically free. And because they’re free, we could have several pre-mixed bottles of coolant ready to go, so when we run out, just swap in the next one and refill the empty(s) at a later time. And it’s easy to tell when you’re running low because the bottle is clear! Genius!

The Mr. Pop Cap 1550 is my own design, however the concept is attributed to Tom Lipton of Ox Tool Co.