Q: How is the RimCraft Gypsum Spray Equipment Designed, Engineered, and Constructed for gypsum processing?

A: The gypsum slurry and the accelerator are abrasive and corrosive materials that require compatible fluid passages made from Stainless Steel and certain plastics, RimCraft does not use Home Depot plumbing fittings that are made of steel.

Q: What is the accelerator and how does it work?

A: The accelerator typically is Aluminum Sulfate. It is used to give the operator control of the gypsum slurry set time. Gypsum slurry has a natural set time (Pot Life) when mixed with H2O. The average pot life is 30-45 minutes before the gypsum slurry begins to harden. This time is insufficient for mechanically processing the gypsum slurry because the entire system would need to be flushed to prevent the slurry from hardening in the spray system. There are gypsum retardants available that change the natural setting time of the gypsum slurry from 30 minutes to over 4 hours. This allows the operator to continue spraying for up to 4 hours before flushing the system. The gypsum slurry is pumped from the plastic slurry tank to the RimCraft Gypsum Spray Gun. When the slurry passes through the Stainless Steel Spray Nozzle the Atomizing Air is injected to burst the slurry into small droplets, creating a spray pattern. The Aluminum Sulfate Accelerator is injected into the gypsum slurry as it exits the spray nozzle. The slurry set time can be adjusted from 5 - 30 minutes, dramatically decreasing mold turn-over time.

Q: Do I have to use the Gypsum Retardant?

A: It is HIGHLY RECOMMENDED, unless you are using a gypsum slurry that provides a pot life greater than 1.5 hours.

Q: Is the accelerator easy to adjust?

A: Yes! Simply turn one knob.