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Quick-change line for cosmetic tubing.

A completely redesigned extrusion line for cosmetic tubing reduces product changeover time from hours to minutes, says Boston Matthews, Norwood, N.J. It's said to be the first such quick-change system for squeeze tubes. The die head has automatic centering instead of a fixed center with the ring of flow-adjusting bolts built into the die body, not into the removable tooling that shapes tube OD. The tip, which forms the tube ID, is likewise not fixed in the die head, but removes with the tooling. This reversal of positions means that melt flow only has to be balanced once when the die is installed, and doesn't need to be tuned each time product tooling is changed.

The die head is also light enough that an operator can move it without a crane. Flow in the die is over a helical, not a spiral, mandrel so the volume of plastic in the head is reduced, speeding color changes. Downstream calibrators are built in sections that weigh 4 to 5 lb for faster tool changes than with heavy one-piece calibrators that require a crane. New computer controls start the line up automatically and remove any off-spec production. Tel: (201) 767-7111 *
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Title Annotation:KEEPING UP WITH: Extrusion
Publication:Plastics Technology
Date:Mar 1, 2007
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