Importance

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Abstract

A system for making wallboard or backerboard sheets may include a mixer for mixing materials for making aerated concrete, at least one face layer supply, and a former downstream from the mixer for forming core material having opposing first and second major surfaces and comprising aerated concrete. The former is preferably also for securing at least one face layer from the at least one face layer supply onto at least one of the first and second major surfaces of the core material. The former may include a mold downstream from the mixer for receiving the materials for making aerated concrete therein and allowing the materials to rise and stiffen into a body, an autoclave downstream from the mold for curing the body, and a saw blade downstream from the autoclave for sawing the body into sheets of core material. A magnetic field generator is provided adjacent the saw blade for causing the saw blade to be substantially flat to saw substantially flat sheets of core material from the body. The saw blade may extend in a substantially horizontal direction and may therefore be subject to gravitational sag in a medial portion thereof.

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First Claim