The well-worn colloquialism, “Think Global, Act Local,” has been around for over 100 years. Different groups such as city planners, environmentalists, and even corporations have adopted the expression to encourage behavior and describe their engagement philosophy. The underlying message is that it is important to have a long term or big picture goal, but action needs to take place where…
As the American Foundry Society rolled out its annual economic forecast in January, the numbers were more encouraging than in recent years. AFS is projecting sales growth of 4.7% in 2018, followed by another 1.8% growth in 2019, for the overall market. Coming on the heels of an estimated 2.7 percent growth in 2017, the industry is looking at its…
Green Sand Casting : Introduction : A commonly used form of sand casting, green sand casting gets its name because wet sand is used in the molding process. A variety of additives like pitch, cellulose and silica flour are used in this process. The aggregate of sand mold consist of mixture like silica, clay, water and other materials are taken for…
Introduction: Lost foam casting technique (LFC) is known by different generic and propriety names like lost foam, evaporative pattern casting, evaporative foam casting, full mold, etc. Similar to the full mold process, in this process the pattern evaporates when the metal is poured into the mold. Originally, full mold process was referred to as Lost Foam Casting . But, later the…
Introduction: A commonly used form of sand casting, green sand casting gets its name because wet sand is used in the molding process. A variety of additives like pitch, cellulose and silica flour are used in this process. The aggregate of sand mold consist of mixture like silica, clay, water and other materials are taken for bank sands or lake…
Introduction: Also known as no bake sand casting, the no bake casting is the most sophisticated casting techniques of the modern times. In this process a strong chemical bond is created in the mold that is made from a mixture of sand, quick-setting resin and catalyst. Air set molding, which is a cold setting process, was developed in response to the increasing demand…
Lost Foam Casting in Aluminium is very similar to Investment Casting (e.g. as used by Jewellers and Dentists) except the finished casting is the result of evaporating Polystyrene out of the mould rather than melting wax. The process lends itself to complex and sculptural shapes which would be difficult to remove from a mould. By its nature, the process can leave a rough surface (reflecting the surface of a…
Green Sand Molding Green sand is by far the most diversified molding method used in current metalcasting operations. The green sand process utilizes a mold made of compressed or compacted moist sand packed around a wood or metal pattern. The term "green" denotes the presence of moisture in the molding sand, and indicates that the mold is not baked or…
What is Investment casting? In investment casting, a wax or suitable polymer pattern is coated by dipping into the refractory material slurry. Once the refractory material coating is hardened then this dipping process is repeated several times to increase the coating thickness and its strength. Once the final coating is hardened the wax is melted out and molten metal is poured…
