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Apparatus (10) for manufacturing polymeric tubing (T) containing a reinforcing material (M) enclosed between first and second polymeric compounds including an extrusion head (11) having an elongate housing (14), a bore extending from a front end (15) of the housing to a rear end (16) of the housing,

Apparatus (10) for manufacturing polymeric tubing (T) containing a reinforcing material (M) enclosed between first and second polymeric compounds including an extrusion head (11) having an elongate housing (14), a bore extending from a front end (15) of the housing to a rear end (16) of the housing, a rear material guide sleeve (50) fixed in the bore proximate the rear end of the housing and having a channel (51) for passing reinforcing material, a forward material guide sleeve (36) fixed in the bore proximate the front end of the housing for radially outwardly constraining passing reinforcing material, a center pin (76) extending substantially the length of the housing and located centrally of the bore thereof, a flow pipe (60) extending from the rear material guide sleeve and forming an inner channel (90) supplying a first polymeric compound, means for adjusting the concentricity of the flow pipe relative to said center pin means, an outer channel (45) supplying a second polymeric compound, and adjustable dies (85,101) controlling the interior and exterior dimensions of the first and second polymeric compounds as the polymeric tubing is extruded.

대표청구항 ▼

Apparatus for manufacturing polymeric tubing containing a reinforcing material enclosed between first and second polymeric compounds including an extrusion head comprising, elongate housing means, bore means extending from a front end of said housing means to a rear end of said housing means, rear m

Apparatus for manufacturing polymeric tubing containing a reinforcing material enclosed between first and second polymeric compounds including an extrusion head comprising, elongate housing means, bore means extending from a front end of said housing means to a rear end of said housing means, rear material guide sleeve means fixed in said bore means proximate said rear end of said housing means and having channel means for passing reinforcing material, forward material guide sleeve means fixed in said bore means proximate said front end of said housing means for radially outwardly constraining passing reinforcing material, center pin means extending substantially the length of said housing means and located centrally of said bore means thereof, flow pipe means extending from said rear material guide sleeve means and forming inner channel means supplying a first polymeric compound, means for adjusting the concentricity of said flow pipe means relative to said center pin means, outer channel means supplying a second polymeric compound, and adjustable die means controlling the interior and exterior dimensions of the first and second polymeric compounds as the polymeric tubing is extruded.