Manufacturing Engineering

Crucible Melting Furnace | Metal Melting Furnace | Tilting Crucible Furnace

Crucible Melting Furnace These crucible melting furnace melt the metal without direct contact with a burning fuel mixture. For this reason, they are sometimes called indirect fuel-fired furnaces. Crucible furnaces are mostly used for melting nonferrous metals and alloys. The metal is melted in a crucible, which is a refractory vessel made of silicon carbide, Graphite, or some other refractory material. Three types of crucible furnaces are: 1. lift out type 2. Stationary 3. Tilting They all utilize a container (the crucible) made out of a suitable refractory material (for example, a clay-graphite mixture) or high-temperature steel alloy to hold the

Cupola Furnace | How To Build A Popular Cupola Furnace | 5 Stages of Iron Melting Furnace

Cupola Furnace A cupola furnace is a vertical cylindrical furnace used for melting cast iron in huge quantities. Furnaces in casting: Melting furnaces used in the foundry industry are of many diverse configurations. The selection of the melting unit is one of the most important decisions foundries must make with due consideration to several important factors, including: · The temperature required to melt the alloy · The melting rate and quantity of molten metal required · The economy of installation and operation · Environmental and waste disposal requirements Several types of furnaces are most commonly used in foundries: · Cupola

Pattern Materials | Wax Casting Patterns | Pattern Properties

Pattern Materials: The design of patterns depends on selection of pattern materials, the types of moulding and number of casting produced, which are described briefly in the below article. What is Pattern? Pattern is the solid form that is used to make the mould. Even though a pattern generally resembles the casting being produced, it differs from the casting in terms of certain allowances that are required for producing the correct shape and dimensions and in eliminating some minor details which are too complicated or small to be produced by casting and are left to be produced later by machining.

Types Of Moulding Sands | Core Sand | Parting Sand

Types of Moulding Sands: According to their types of moulding sands use in the foundry, moulding sands are classified into following categories: Foundry Green sand Dry Sand Loam sand Parting sand Facing sand Backing sand System sand Core sand The following are the primary elements of moulding sands: Silica (SiO2) accounts for 86 to 90 percent of the total, alumina (Al2O3) accounts for 4 to 8 percent, and iron oxide (Fe2O3) accounts for 2 to 5 percent, with lesser quantities of titanium oxide (TiO2), manganese oxide (MnO2), calcium oxide (CaO), and certain alkaline compounds. 1. Foundry Green sand It is a

Properties Of Moulding Sands

Properties of moulding sands: The important properties of moulding sands are: Strength Permeability Grain Size and Shape Thermal stability Refractoriness Flow ability Sand Texture Collapsibility Adhesiveness Reusability Easy of preparation and control Conductivity 1. Strength · The sand should have adequate strength in its green, dry and hot states · Green strength is the strength of sand in the wet state and is required for making possible to prepare and handle the mould. · If the metal is poured into a green mould the sand adjacent to the metal dries and in the dry state it should have strength to