Tubular extrusion apparatus

Details Tubular extrusion apparatus Tubular extrusion apparatus

1980-01-04

1981-08-25

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Core, pin or insert member

264514, 2642098, 264173, 4251311, 4253261, 425376A, 425380, 425462, B29F 304

Patent

active

042856566

ABSTRACT:
An apparatus is provided to ensure uniform distribution of molten thermoplastic resin around a tubular die annulus upon extrusion of a thermoplastic tube. The apparatus comprises a toroidal chamber surrounding the die into which the molten resin is fed from one side, and a plurality of ports through which the molten plastic flows out of that chamber toward the die annulus. The cross-sectional area of each of the ports is gradually increased from a point adjacent the entry of the molten resin to a maximum feed port cross-section at a point 180.degree. from the resin entry point. This arrangement ensures a more uniform molten resin distribution around the die annulus during extrusion.

REFERENCES:
patent: 2766479 (1956-10-01), Henning
patent: 2864126 (1958-12-01), Henning
patent: 2911676 (1959-11-01), Henning
patent: 2978748 (1961-04-01), McCauley et al.
patent: 3321803 (1967-05-01), Corbett
patent: 3447204 (1969-06-01), Lainson
patent: 3608136 (1971-09-01), Tripptrap

Affiliated with

Also associated with

Rating

Tubular extrusion apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tubular extrusion apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tubular extrusion apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1156154