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  2. Sprue (manufacturing) - Wikipedia

    en.wikipedia.org/wiki/Sprue_(manufacturing)

    Bronze casting showing sprue and risers. A sprue is a large diameter vertical channel through which liquid material is introduced into a mold. It connects the pouring basin to the runner. In many cases it controls the flow of material into the mold.

  3. Metal casting - Wikipedia

    en.wikipedia.org/wiki/Metal_casting

    Molten metal before casting Casting iron in a sand mold. In metalworking and jewelry making, casting is a process in which a liquid metal is delivered into a mold (usually by a crucible) that contains a negative impression (i.e., a three-dimensional negative image) of the intended shape.

  4. Riser (casting) - Wikipedia

    en.wikipedia.org/wiki/Riser_(casting)

    A bronze casting showing the sprue and risers. A riser, also known as a feeder, [1] is a reservoir built into a metal casting mold to prevent cavities due to shrinkage.Most metals are less dense as a liquid than as a solid so castings shrink upon cooling, which can leave a void at the last point to solidify.

  5. Investment casting - Wikipedia

    en.wikipedia.org/wiki/Investment_casting

    The sprue is cut off and recycled. The casting may then be cleaned up to remove signs of the casting process, usually by grinding. [12] Finishing: After grinding, the completed casting is then subject to finishing. This usually goes further than grinding, with impurities and negatives being removed via hand tooling and welding.

  6. Die casting - Wikipedia

    en.wikipedia.org/wiki/Die_casting

    Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape and work similarly to an injection mold during the process.

  7. Cope and drag - Wikipedia

    en.wikipedia.org/wiki/Cope_and_drag

    The rough casting is separated from the sprue and riser(s) either by sawing them off, or just breaking the thin metal of the gates and runners. In some cases the part design is more complicated, and intermediate flasks and mold sections are needed between the cope and drag.

  8. Sprue (casting) - Wikipedia

    en.wikipedia.org/?title=Sprue_(casting)&redirect=no

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  9. Directional solidification - Wikipedia

    en.wikipedia.org/wiki/Directional_solidification

    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 ]