Abstract: A viscosity control system for measuring and controlling a viscosity of a viscous fluid includes a viscosity sensor unit, a supply of viscosity adjusting fluid, and a controller. The viscosity sensor unit includes a container having an inlet and an outlet, a flow of the viscous fluid flowing into the inlet, and a sensor configured to sense a height of a surface of the viscous fluid in the container. A diameter of the outlet and the flow of the viscous fluid are configured to generate a height of the viscous fluid in the container that is within a predetermined height range. The controller is configured to receive the sensed height, compare the sensed height to the predetermined height range, and modulate a flow of fluid from the supply of viscosity adjusting fluid in response to the sensed height being outside the predetermined height range.

Abstract: An investment mold slurry curtain apparatus includes a slurry curtain of a slurry fluid, the slurry curtain having a length and a thickness, the length substantially greater than the thickness. The apparatus also includes an outlet configured to dispense the slurry fluid and form the slurry curtain. The investment mold slurry curtain apparatus may include and be described as an investment mold slurry coating apparatus including a conduit configured to receive a flow of a slurry fluid and an outlet operatively coupled to the conduit, the outlet configured to dispense the flow of the slurry as a curtain of the slurry.

Abstract: An investment mold slurry curtain apparatus includes a slurry curtain of a slurry fluid, the slurry curtain having a length and a thickness, the length substantially greater than the thickness. The apparatus also includes an outlet configured to dispense the slurry fluid and form the slurry curtain. The investment mold slurry curtain apparatus may include and be described as an investment mold slurry coating apparatus including a conduit configured to receive a flow of a slurry fluid and an outlet operatively coupled to the conduit, the outlet configured to dispense the flow of the slurry as a curtain of the slurry.