Machine for applying a protective material onto a pipe

Details Machine for applying a protective material onto a pipe Machine for applying a protective material onto a pipe

1999-03-09

2000-08-08

Walsh, Donald P.

Winding, tensioning, or guiding

Composite article winding

By rotating core

242437, 242443, B21C 4710, B65H 8106

Patent

active

060989130

ABSTRACT:
A machine for applying one or more protective layers of material onto a tubular member, for example a pipe, in a substantially wrinkle free and continuous manner. The machine includes a brake tension unit for applying a constant tension to the protective material in order to neck down the material as it is applied onto the pipe, and a base unit for supporting and rotating the pipe. The constant brake tension unit preferably includes a conventional disc brake and a mounting arm for holding a core of material in engagement with the brake tension unit. Pressure applied to the rotor slows rotation of the rotor and the attached core which restricts the unwinding of the protective material from the core. Thus, as the material attempts to unwind from the core a preselected force is applied to resist the unwinding. The material is therefore placed under tension and, due to the nature of the protective material, the material elongates and necks down under the applied pressure. The brake unit may also include a tension arm for holding the protective layer against the pipe to prevent slack in the material as it is being applied.

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