SYSTEM AND METHOD FOR REDUCING VISCOSITY VARIATIONS IN ROOFING ASPHALT

摘要

An asphalt shingle coating system that includes a coater, a mixer, a viscosity gauge, a wax supply, a wax pump and a control system. The coater applies a layer of a coating asphalt mixture on an asphalt shingle substrate. The mixer mixes the coating asphalt mixture and is positioned upstream of the coater. The viscosity gauge may be positioned between the coater and the mixer, and it measures the viscosity of said coating asphalt mixture before it is delivered to the coater. The wax supply is in fluid communication with the mixer and a wax pump may deliver a volume of wax from the wax supply to the mixer, and the control system may selectively adjust the operation of the wax pump to substantially maintain a desired viscosity of said coating asphalt mixture.

主权项

1. An asphalt shingle coating system comprising:
a coater for coating an asphalt shingle substrate with a coating asphalt mixture; a mixer for mixing said coating asphalt mixture, said mixer in fluid communication and upstream of said coater; a viscosity gauge for measuring the viscosity of said coating asphalt mixture delivered to said coater, said viscosity gauge disposed between said coater and said mixture; a wax supply in fluid communication with the mixer; a wax pump for delivering a volume of wax from the wax supply to the mixer; and a control system in electronic communication with said viscosity gauge and said wax pump, said control system operable to selectively adjust the operation of said wax pump to substantially maintain a desired viscosity of said coating asphalt mixture.