Glass Forming Moulds: Material and Design

JSGT 1933 V17 T050-T067

The paper discusses the operations passed through during the formation of a glass bottle in the moulds of a forming machine and discusses in some detail the relationship between the volume of the parison mould and the volume of glass in the article to be made. This relationship has been shown to be linear on the basis of 42 moulds operating on a blow and blow machine making articles varying from approximately 3to 30 oz in weight. The contour of the parison is also discussed and special consideration given to the case of wide-mouth containers and bottles of irregular shape. The qualities which are needed in moulds are enumerated and an account is given of the result of experiments on a number of moulds made from special alloys.

Thomas Wardley