METHOD OF PRODUCING FLEXIBLE HEAT-INSULATION TUBE Russian patent published in 2012 - IPC B29D23/00 B29C47/04 B29C47/78 B29C67/20 B32B37/15

Abstract RU 2450926 C1

FIELD: process engineering.

SUBSTANCE: outer tube is extruded coaxially with working tube by extrusion head with angular flow of polymer material to make helical surface with the help of rotary equalising device. Foaming material making heat-insulation layer between protective tube and working tube is fed into thermally stabilised space between said tubes. Note here that aforesaid foaming material temperature is maintained by air conditioning system cooling material feed and mix channels and making material positioning means.

EFFECT: ruling out premature foaming, stable foaming.

4 cl, 5 dwg

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RU 2 450 926 C1

Authors

Narkevich Sergej Leonidovich

Pavljuk Evgenij Sergeevich

Dates

2012-05-20—Published

2010-06-28—Filed