Patent ID: 9744710
Date: 2017-08-29
CPC Classifications: B29C,B29K,B29L,F24T,F28F,Y02E,Y02P

Claim:
1. A process for creating a two stage extruded pipe, comprising the steps of: extruding in a first sleeve shaped and elongated component; sizing the sleeve shaped component within a chamber incorporating a series of linearly spaced sizing dies in order to maintain a shape of the first sleeve shaped component during cooling thereof; extruding in a second stage a pair of outer lobes to exterior surfaces of the sleeve shaped component at displaced circumferential locations so that the lobes each define a separate passageway and further so that the lobes do not contact one another, thereby revealing first and second exposed portions of the sleeve shaped component; cooling the two stage extruded pipe; and sectioning the pipe into given lengths.