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CT: Cold shuts occur when two relatively cold streams of molten metal from different gates meet and do not fuse together properly during the casting process. This problem is visible to the naked eye – giving the appearance of a crack separating the two sections. Cold shuts can either extend through part of the casting or the entire workpiece.
A misrun occurs when the molten metal freezes before it reaches all parts of the mould cavity – which leaves a completely unfilled part of the mould.
Both problems can lead to weak spots in castings, so it is important that we prevent these issues from occurring during production.

S: HawCast – https://www.haworthcastings.co.uk/news/the-differences-between-cold-shuts-and-misruns (last access: 19 October 2019)

N: 1. – cold (adj): cold (adj): Old English cald (Anglian), ceald (West Saxon) “producing strongly the sensation which results when the temperature of the skin is lowered,” also “having a low temperature,” from Proto-Germanic *kaldjon (source also of Old Frisian and Old Saxon kald, Old High German and German kalt, Old Norse kaldr, Gothic kalds “cold”), from PIE root *gel- “cold; to freeze” (source also of Latin gelare “to freeze,” gelu “frost,” glacies “ice”).
– shut (n): Variation of chute or shute (archaic, related to shoot) from Old English scēotan.
2. Foundry Practice:
– cold shut. A casting defect that arises from the freezing over of the surface of the ingot or casting before the mould has been filled. This embraces splashings in the mould, interrupted pouring, separations by dirty films in sluggish metal that fails to fill the mould completely, and the cooling, and consequent failure to unite on meeting, of metal entering a mould by different gates or runners.
– cold shot: Metallic particle, generally spheroidal and located on the drag surface of the casting. The chemical composition is identical to that of the casting and the surface is generally oxidised.
3. Plastics Manufacturing: cold slug, cold-slug.
4. Aluminium: cold lap.

S: 1. OED – https://bit.ly/2qsdqMc (last access: 19 October 2019); Wiktionary – https://bit.ly/31xxSYO (last access: 19 October 2019). 2. TERMIUM PLUS – https://bit.ly/35Mb4bb (last access: 19 October 2019); GDT – https://bit.ly/1a35ouY (last access: 19 October 2019). 3 & 4. TERMIUM PLUS – https://bit.ly/35Mb4bb (last access: 19 October 2019).

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