Factors of Tire Design and Manufacture Affecting Uniformity

Some of the factors covering the effects of design and manufacture on tire uniformity are related. It is shown that the current level of uniformity is dependent on the continuous rigid control of all processes throughout manufacture and the constant evaluation of materials, components, and finished tires for conformance to specification. The importance of correct design and selection of materials to minimize nonuniformities is presented and the effects of various factors of design and manufacture are illustrated on graphical recordings obtained from various uniformity measuring machines. In addition, several fundamental shape and dimension relationships characteristic of conventional tire manufacturing are reviewed to emphasize the significance of irregularities caused by some of the factors.