| 摘要 |
A METHOD AND APPARATUS FOR MECHANICALLY RESHAPING AND/OR FORMING TEXTURES IN THE SIDE WALL OF METAL CAN BODIES (5) IN WHICH A CAN BODY IS MOUNTED ON A PROFILED MANDREL (10) AND ROLLED ALONG A SECOND MANDREL OR RAIL (20), WHICH IS ALSO PROFILED. THE TOOLS (10, 20) ARE MADE FROM HARD MATERIAL BUT EITHER THE MANDREL (10) CARRYING THE CAN OR THE SECOND MANDREL OR RAIL (20) IS RESILIENTLY MOUNTED. THIS MOUNTING HAS BEEN FOUND TO FACILITATE CONTROL OF THE DEPTH OF THE PROFILED FEATURES FORMED IN THE CAN BODY. IN PARTICULAR, THE PROBLEM OF DEPTH VARIABILITY WHICH WILL ARISE DUE TO EXPANSION OF THE MACHINE AND TOOLING IN NORMAL RUNNING CONDITIONS, OR VARIABILITY IN THICKNESSES IN THE CAN BODY IS AVOIDED. TYPICALLY, THE CAN BODY IS CLAMPED BETWEEN COMPLEMENTARY UNFORMED REGIONS (55,60) ON THE TOOLS (10,20) DURING FORMING SO AS TO PREVENT WRINKLING OR LOCALISED THINNING OF THE CAN SIDE WALL.(FIGURE 5)
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