英和和英

出典:『Wikipedia』 (2011/03/20 21:51 UTC 版)

英語による解説

引用

A record press is a machine for manufacturing vinyl records. It is essentially a hydraulic press with a closing force of 100 tons and is fitted with moulds. Labels and a vinyl pattie (pre-heated vinyl blob) are placed in the mould cavity while the moulds are being steam-heated with an ideal steam pressure of 140-170psi. Stampers (metal plates, one for each of Side A and Side B) for each title to be pressed are fitted to the moulds. The stamper contains a negative image of the grooves. The moulds close and through the process of compression moulding the vinyl fills the cavity and takes the form of the finished record, complete with grooves courtesy of the thin metal "stamper".