Apparatus for making foamed plastic pipe insulation

Details Apparatus for making foamed plastic pipe insulation Apparatus for making foamed plastic pipe insulation

1975-01-31

1976-10-12

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to form or reshape preform

264 401, 264 462, 264 469, 425115, 425143, 425224, 425817C, B29D 2704

Patent

active

039854833

ABSTRACT:
The apparatus includes a stationary hollow mandrel supported at one end, a pair of forming shoes over which strips of material are respectively pulled longitudinally of the mandrel to provide a cylindrical inner liner surrounding the mandrel and a cylindrical outer jacket surrounding the inner liner in spaced relationship thereto, a conduit having an outlet end portion disposed within the outer jacket above the inner liner, supply means for supplying foamable hardenable liquid material to an inlet end portion of the conduit, additional supply means for separately supplying a fast acting catalyst to the foamable material in the conduit, means for reciprocating the outlet end portion of the conduit transversely over the inner liner, conveyor-mold means confining the outer jacket as the foamable material foams and cures, rotatable tire means for pulling the insulation formed by the outer jacket, the cured foam, and the inner liner off the mandrel longitudinally thereof, a traveling saw for cutting the insulation into predetermined lengths, a slitting saw for slitting the tubular insulation longitudinally, and an infrared sensor for controlling the speed of two motors respectively driving the conveyor-mold means and the rotatable tire means in accordance with the amount of heat generated by the foamable hardenable liquid material.

REFERENCES:
patent: 3118800 (1964-01-01), Snelling
patent: 3245261 (1966-04-01), Buteux et al.
patent: 3265786 (1966-08-01), Voelker
patent: 3374300 (1968-03-01), Azuma
patent: 3809512 (1974-05-01), Blackwell et al.
patent: 3816043 (1974-06-01), Snelling et al.
patent: 3837771 (1974-09-01), Kolakowski et al.
patent: 3842277 (1974-10-01), Jayachandra
patent: 3860371 (1975-01-01), Willy

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