Tuesday, October 31, 2017

Binks Mach 1 PCX Spray Gun

Robot Spray Gun

The next piece of the puzzle goes a long way toward being able to spray without mixing pre-catalyzed batches of material.  Factory and robotic production of fiberglass resin products have been using external catalyzation.  This is where the resin and catalyst are mixed in the airstream after leaving the sprayer.

Binks 2100GW
Binks makes a few external catalyzing hand spray guns.  I initially considered using the 2100GW.  This gun has a small catalyst bottle attached to the side of the gun.  It seemed to be fine for small repairs but one thing you don't want to do is run out of catalyst while spraying.  This would cause under or no catalyzation at all.  I also felt that it doesn't allow using the gun in all positions since the catalyst could be sloshing around in the bottle and the pickup tube may become uncovered and suck up air.

Binks Mach 1 PCX
Fortunately, Binks  also makes the Mach 1 PCX.  It is a very specialty product and since only a few are sold, the price is quite expensive.  Much more than I ever thought I would spend on a spray gun.  It is an HVLP (High Volume, Low Pressure) system.  The resin is routed to the gun by a hose from a pressure pot.  The catalyst is also routed to the gun through a second hose from it's pressure pot.  The air comes through a third hose to provide atomization.  This allows for spraying in any position and the catalyst quantity is only limited by the size of you tank.


The orifice size is 2.4 mm which is sufficiently large enough to spray high viscosity material like gelcoat.  Car paint orifices are half that size which is why those guns will not work unless the gelcoat is really thinned out.

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