I. Overview:

Gassing refers to the type of “core” sand specimen heat, in the specified time the number of milliliters of gas occurred, called the amount of gas, can be used per gram of specimen gas milliliters to indicate. Another meaning of gas generation is gas generation speed, to the sample of gas generation and time of the relationship between the curve to indicate. Molding materials and molding (core) sand gassing will affect the casting to produce porosity or the formation of sand entrapment, so the casting production should pay attention to the molding material gassing control, in recent years, with the chemical binder in the foundry industry in a wide range of applications, hope that the volume of gas and gassing rate is important to measure the volume of gas at a particular temperature conditions.

We refer to the American Foundrymen's Society (AFS) recommended the gas generation tester, it is both in line with international standards and in theory and practical operation of gas generation tester suitable for our standards, and the structure is simple and reasonable, easy to operate, and can be used as a scorch reduction in the amount of determination, by the majority of foundry workers welcome. The main test casting sand, clay sand, resin sand, coated sand and other materials such as the amount of gas.

II. the working principle and the main structure:

2-1 working principle schematic diagram:

1-porcelain boat; 2-porcelain tube; 3-tube decomposition furnace; 4-gas chamber; 5-gas measurement system; 6-display control system

2-2 This instrument is mainly composed of tubular decomposition heating furnace and system instrument box, etc..

The main structure by the intelligent temperature control system, gas system, gas volume display system and other components, gas system using a single-tube high-temperature decomposition resistance furnace with intelligent temperature controllers and high-temperature ceramic tubes, the use of heating specimens, so that the occurrence of gas, gas gas chamber cooled by the gas volume display system to test the direct reading of the gas volume of milliliters.

III. technical parameters:

3-1 measurement range: 0 ~ 100 ml

3-2 Measurement accuracy: less than the full scale ± 3%

3-3 use temperature: up to 1200 ℃, commonly used temperature of 850 ℃.

3-4 Decomposition furnace rated power: 1.5 kW ~ 2.5 kW

3-5 Temperature rise time: 20 ~ 30min

3-6 temperature control accuracy: 1 level

3-7 Power supply voltage: AC220V

3-8 Hearth size: Φ25×180mm

3-9 Decomposition furnace size: 600 × 275 × 480 mm, the host size: 150 × 280 × 280

3-10 Decomposition furnace weight: 21 kilograms