Plastic Patterns
Plastics are getting more popularity now a days because the patterns made of these materials are lighter, stronger, moisture and wear resistant, non sticky to molding sand, durable and they…
Metal Pattern
Metallic patterns are preferred when the number of castings required is large enough to justify their use. These patterns are not much affected by moisture as wooden pattern. The wear…
Common Pattern Materials
The common materials used for making patterns are wood, metal, plastic, plaster, wax or mercury. The some important pattern materials are discussed as under. Wood Wood is the most popular…
PATTERN
A pattern is a model or the replica of the object (to be casted). It is embedded in molding sand and suitable ramming of molding sand around the pattern is…
AIR FURNACE
This furnace is also known as puddling or reverbratory furnace. It is used for making wrought iron. Fig 6.8 shows the construction of this type of furnace.
OPEN HEARTH FURNACE
In open hearth furnace, pig iron, steel scrap etc. are melted to obtain steel. This furnace is widely used in American foundries for steel production. The hearth is surrounded by…
Precautions for Safety of Cupola Furnace
For operating the cupola successfully, the following safety precautions must always be kept into account. 1. For safety of Cupola, better quality refractory lining must be used for preparing or…
CUPOLA FURNACE
Cupola furnace is employed for melting scrap metal or pig iron for production of various cast irons. It is also used for production of nodular and malleable cast iron. It…
Blast Furnace
After mining, various kinds of iron ores are brought to the blast furnace which is the starting process for refining iron ores or mined ores and for the poduction of…
Furnaces For Melting Different Materials
1. Grey Cast Iron (a) Cupola (b) Air furnace (or Reverberatory Furnace) (c) Rotary furnace (d) Electric arc furnace 2. Steel (a) Electric furnaces (b) Open hearth furnace 3. Non-ferrous…
