Title

Shape Improvement Obtained from an In-Line Compact Tinplate Leveller

Shape Improvement Obtained from an In-Line Compact Tinplate Leveller

Authorship

PODDA, PHILIPPE; JACQUES SERVANTON, JEAN

PODDA, PHILIPPE

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JACQUES SERVANTON, JEAN

I am this author

DOI

10.5151/2594-5297-LAC01891

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Abstract

Over the past few years, the Technology and Efficiency of the can makers has increased rapidly, particularly in the three pieces welded can market. The developments which have taken place, coupled with the requirement for much thinner material has placed greater emphasis on all aspects of Tinplate quality, with the ability to maintain strip flatness under all conditions becoming a high priority. In producing these lighter gauge products, Tinplate manufacturers must strive not only to produce physically flat material but material with very low longitudinal bow. This much reduced longitudinal bow must be accompanied with low and uniform residual internal stress which ensures the flatness is maintained after subsequent operations such as cutting, slitting and blanking has taken place. In response to these requirements for flat shape under all subsequent operations, prestigious Tinplate manufacturers installed a Clecim Tension leveller into their electrolytic tinning lines. The machine incorporated the state of the art know-how in equipment and control philosophy. As a result, flatness levels consistent with the current requirements of the can makers are able to be achieved. Some of the main technological features included in the design are, flex tension levelling units, a multi rol1 unit, weld passage and quick rol1 change facilities, cleaning devices, internal tensiometer rol1 and a sophisticated control and machine set-up procedure for all operating conditions. This paper highlights the flatness achieved on commercially produced Double Reduced material using this Clecim Leveller.

Over the past few years, the Technology and Efficiency of the can makers has increased rapidly, particularly in the three pieces welded can market. The developments which have taken place, coupled with the requirement for much thinner material has placed greater emphasis on all aspects of Tinplate quality, with the ability to maintain strip flatness under all conditions becoming a high priority. In producing these lighter gauge products, Tinplate manufacturers must strive not only to produce physically flat material but material with very low longitudinal bow. This much reduced longitudinal bow must be accompanied with low and uniform residual internal stress which ensures the flatness is maintained after subsequent operations such as cutting, slitting and blanking has taken place. In response to these requirements for flat shape under all subsequent operations, prestigious Tinplate manufacturers installed a Clecim Tension leveller into their electrolytic tinning lines. The machine incorporated the state of the art know-how in equipment and control philosophy. As a result, flatness levels consistent with the current requirements of the can makers are able to be achieved. Some of the main technological features included in the design are, flex tension levelling units, a multi rol1 unit, weld passage and quick rol1 change facilities, cleaning devices, internal tensiometer rol1 and a sophisticated control and machine set-up procedure for all operating conditions. This paper highlights the flatness achieved on commercially produced Double Reduced material using this Clecim Leveller.

Keywords

"Panel flat" Double Reduced material, Clecim Tension Leveller, controlled elongation, compact design, interconnecting gear box drive, fully automaticoperation, special multi-roll unit, coil set, bow blanks, residual stress.

"Panel flat" Double Reduced material, Clecim Tension Leveller, controlled elongation, compact design, interconnecting gear box drive, fully automaticoperation, special multi-roll unit, coil set, bow blanks, residual stress.