APPARATUS FOR DETERMINING SEPARATION SPEED OF TOXIC GASES OUT OF POURED CASTING MOLDS Russian patent published in 2005 - IPC

FIELD: foundry.

SUBSTANCE: apparatus includes upper mold-half and lower metallic mold-half. Upper flask is filled with sand and it has cavity for pouring melt metal and heat-insulation ring. Lower mold-half has base, sleeve and heat insulation cylinder. Sample of sand is placed into said cylinder and it is fixed by means of net. There is cavity between net and lid; said cavity is communicated with atmosphere through opening of lid and duct in which sampler is mounted. Other opening of lid is communicated with carrier-gas source through gas flow rate pickup. Gases are generated in sample by action of temperature of cast metal and they are filtered into cavity between net and lid where said gases are mixed with carrier gas. Flow rate of carrier gas is registered by means of pickup calibrated according to flow rate of selected carrier gas. Formed gas mixture is directed to sampler and in atmosphere. Mass speed of toxic gas separation is calculated on base of flow rate of carrier gas and concentration of toxic gas contained in samples of gas mixture. It is possible to use samples of different diameter.

EFFECT: enhanced accuracy of determining parameters of gas separation out of poured casting mold.

2 cl, 2 dwg