Smoke chamber for evaluating foundry sand shapes and its method of use

Abstract

A smoke chamber for determining the amount of visible smoke emitted by a foundry core/mold resin system is composed of an elongate chamber having a proximal end, a distal end, and sides. The chamber is fitted with air inlet at its proximal end, a smoke outlet at its distal end, and a sample station disposed between the air inlet and the smoke outlet. The sample station includes a sample holder and furnace for heating a sample placed in the sample holder. The chamber also includes a light assembly disposed along one side of the chamber from the sample station to the smoke outlet. A light detection assembly is disposed on a chamber side opposite the light assembly for detecting light emitted from the light assembly. The chamber also includes fan for drawing smoke from a heated sample placed in the sample holder to the smoke outlet. The corresponding method for determining the amount of visible smoke emitted by a foundry core/mold resin system includes placing a sample in the sample holder. The sample in the sample station is heated by the furnace to pyrolize the sample. The amount of visible smoke emitted by the pyrolized sample is measured with the light detection assembly. Desirably, the light detection assembly is composed of a plurality of discrete photodetection units, each of which is in. electrical connection with a recorder for recording the amount of visible light detected by each of the photodetection units.