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If a design requires a high degree of accuracy, fine surface finish or defect free surface it reduces the castability of the part. [2] However, the casting process can be very economical for part designs that require intricate contoured surfaces, thickness variations, and internal features.
Directional solidification is the preferred technique for casting high temperature nickel-based superalloys that are used in turbine engines of aircraft. Some microstructural problems such as coarse dendritic structure, long dendrite side branches, and porosity hinder the full potential of single crystal ni-based alloys. [ 6 ]
A core is a device used in casting and moulding processes to produce internal cavities and reentrant angles (an interior angle that is greater than 180°). The core is normally a disposable item that is destroyed to get it out of the piece. [1] They are most commonly used in sand casting, but are also used in die casting and injection moulding.
The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process. Casting materials are usually metals or various time setting materials that cure after mixing two or more components together; examples are epoxy, concrete, plaster and clay. Casting is most often used for making complex shapes ...
The exact process and pattern equipment is always determined by the order quantities and the casting design. Sand casting can produce as little as one part, or as many as a million copies. Although additive manufacturing modalities such as SLS or SLM have potential to replace casting for some production situations, casting is still far from ...
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A parting line, in industrial casting of molds, is the border line between the two halves of the mold (known as the “core” and the “cavity.”), which draft direction change at here. One can check the parting line in the mould or product which divides the two half.
Draft angle design is an important factor when designing plastic parts. Because of shrinkage of plastic material, injection molded parts have a tendency to shrink onto a core. This creates higher contact pressure on the core surface and increases friction between the core and the part, thus making ejection of the part from the mold difficult.
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