Calibrator for use in the manufacture of double walled thermopla

Details Calibrator for use in the manufacture of double walled thermopla Calibrator for use in the manufacture of double walled thermopla

1984-03-07

1985-11-26

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

264313, 264508, 4253261, 425381, 425393, 425466, 425DIG14, B29C 5300, B29C 5356

Patent

active

045552304

ABSTRACT:
In an apparatus such as a corrugator for manufacturing thermoplastic pipe with a corrugated outer wall and a smooth inner wall, a calibrator is employed to provide a smoother inner wall and a more rapid inner wall cooling. The calibrator includes a tube wound into a helical coil and an adjustment mechanism for adjusting the coil diameter. A cooling fluid may be passed through the tube.

REFERENCES:
patent: 3247548 (1966-04-01), Fields et al.
patent: 3538209 (1970-11-01), Hegler
patent: 3976414 (1976-08-01), Hegler et al.
patent: 4226580 (1980-10-01), Lupke et al.
patent: 4233020 (1980-11-01), Oswald
patent: 4352470 (1982-10-01), Blakeslee
patent: 4510013 (1985-04-01), Lupke et al.

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