Method of manufacturing roller chimes for closed head drums

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...

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425525, B29C 1707

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active

042281229

ABSTRACT:
In the production of closed head drums, integral L-shaped roller chimes are formed outwardly from the side walls of the drums. In producing the drums, a thermoplastic parison or tubular member is placed within a mold and is shaped by blowing it outwardly against the mold surfaces. In the blowing operation, an inwardly open channel-shaped part is formed in the tubular member, then by moving one part of the mold relative to another, the channel-shaped part is compressed into the L-shaped chime.

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