Manufacture of large castings in permanent molds
A new technological process has been introduced for manufacturing large cast-iron pulley blanks in permanent molds. The pulley casting weighs 137 kg and has a rim diameter of 650 mm. The permanent mold is split horizontally. Before pouring metal the mold is heated with a gas torch to a temperature of 200-250/sup 0/C and coated with a layer of thermal insulation material. The molten metal is poured at a temperature of 1280-1300/sup 0/C within a period of 40-50 seconds. The casting is held in the mold for 4-5 minutes. A simple pneumatic machine has been designed for ejecting the castings. The permanent mold, being made of cast iron, can be used for more than 500 castings. Introduction of the new technological process for casting pulleys in permanent molds has reduced the labor requirement by four times, eliminated rejections caused by using sand molds, and improved the working conditions.
- OSTI ID:
- 6537979
- Journal Information:
- Chem. Pet. Eng. (Engl. Transl.); (United States), Journal Name: Chem. Pet. Eng. (Engl. Transl.); (United States) Vol. 18:6; ISSN CPTEA
- Country of Publication:
- United States
- Language:
- English
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360101* -- Metals & Alloys-- Preparation & Fabrication
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420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
CARBIDES
CARBON COMPOUNDS
CAST IRON
CASTING
CASTING MOLDS
COST BENEFIT ANALYSIS
DESIGN
ELEMENTS
FABRICATION
FLUID MECHANICS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
MECHANICS
METALS
PNEUMATICS
TRANSITION ELEMENT COMPOUNDS