| 摘要 |
This invention relates to the manufacture of balls such as cricket balls, hockey balls and the like. The method of manufacturing such a ball comprises providing at least two cover-forming pieces (10 and 11) which are then placed in a generally spherical cavity of a mould (13 and 14) whereafter a suitable core- forming material, such as a polyurethane, is injected into the space between said pieces so as to form, after setting, a core for the ball which also connects the two pieces 10 and 11 together. Each of said pieces 10 and 11 may be provided around its periphery with one or more rows of stitching 12 which project outwardly so as together to form a seam for the completed ball. Alternatively, the ball may be of a stitchless construction. The aforesaid cover-forming pieces may comprise a pair of hemi-spherical cups or they may comprise a pair of pieces which are each of generally figure-of-eight configuration. <IMAGE> |
