Chaplet
A chaplet proper consists of a stem of indefinite length, terminating at one end with an increased flat surface, which renders it less likely to be thrust into the core by pressure or weight. If this plate end is forged out of the whole piece the chaplet is a good one, and may be relied upon; but a riveted end is an abomination for more reasons than one. In the first place they are apt to slip through unless the shoulder is enlarged, and that is not sufficient to prevent the head from flying off when struck; consequently, whether they are home-made or purchased from the dealers, the solid ones are to be preferred. By means of a match-plate very many excellent chaplets for ordinary purposes may be made of cast iron; for many jobs they are infinitely superior to wrought iron, and very much cheaper. Chaplet is the general term for almost every device for holding down or supporting cores and sections of moulds; even springers are recognized as a species of chaplet, and so called in many parts (see SPRING-CHAPLET), and solid studs of almost every description go by this name. Two important features in this connection are rust and lack of material. Both of these conditions are fatal to a mould--the former because of the large amount of gas evolved when the rust decomposes; the latter because of their too frequent use in parts where the current of metal dissolves the stud, leaving the part without support.
Both studs and chaplets are incorrectly called anchors in some foundries. See ANCHOR.