. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. to lift the core off from its base. This binding is effected by burying an iron rod in the core,having on it a cross at the end to give it a hold of the sand, the outer end being locked to a trans-verse piece which bears on the edges of the box. The metal requires to be at a high temperature for hollow moulding; for so quickly does it cool,that the brim of a moderate-size pot sets even before the mould is filled. While yet red hot thecasting is taken out of the sand, and the gate piece knocked off at a cer
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. to lift the core off from its base. This binding is effected by burying an iron rod in the core,having on it a cross at the end to give it a hold of the sand, the outer end being locked to a trans-verse piece which bears on the edges of the box. The metal requires to be at a high temperature for hollow moulding; for so quickly does it cool,that the brim of a moderate-size pot sets even before the mould is filled. While yet red hot thecasting is taken out of the sand, and the gate piece knocked off at a certain stage of the cooling, aswhen this is done too soon the gate does not break clearly off, and when delayed too long, it oftencarries off a piece of the bottom of the pot with it. With a view to provide against this, the potis made considerably thicker at the centre of the bottom. Flat gates are formed for flat-bottomedware, frying-pans for example. They are wide at the mouth to receive the iron the better, buttaper like a wedge toward the moulding, so as to be easily separated fro
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
