Claims
- 1. Rotary extrusion apparatus, comprising:
- frame means including a plate having a circular aperture,
- a die ring carried in said frame means interiorily of said aperture,
- said die ring having a cylindrical wall with extrusion orifices therein,
- means for feeding extrudable material into said die ring including distributor means carried by said frame means for depositing said material in said die ring,
- bearing means surrounding said cylindrical wall adjacent one end of said die ring to mount said die ring for rotation in said frame means, said bearing means having inner and outer rings with the outer ring being mounted to said plate around said aperture and the inner ring being mounted to said die ring wall so that said die ring depends below said frame plate,
- roller means disposed inside said die ring for rotation in close proximity with the inside of said die ring wall, said roller means including a pair of rollers disposed at diametrical locations in said die ring, each roller having a diameter slightly less than the inside radius of said die ring wall to provide an elongated nip between each roller and the die ring to improve feeding of the material between the rollers and the die ring,
- means for rotating said roller means, and
- means coupling said roller means to said die ring to cause said roller means to rotate with said die ring,
- whereby material fed into the die ring is extruded through the extrusion orifices upon rotation of the die ring and roller means.
- 2. Apparatus according to claim 1 wherein said one end of said die ring is open to receive material from said distributor means, said frame means includes a cover plate extending across said open end of said die ring, and said distributor means includes a pair of inlets affording access into said die ring through said cover plate at diametrical locations intermediate the locations of said rollers.
- 3. Apparatus according to claim 2 wherein said rollers have drive shafts extending through said cover plate, and including means carried by said cover plate for rotatably mounting said shafts on the side of said plate opposite said die ring.
- 4. Apparatus according to claim 3 wherein said shaft mounting means includes a pair of plates projecting from said cover plate along opposite sides of each shaft, a pair of axially-spaced pillow blocks mounted between said plates, and means mounting said pillow blocks to said plates to afford adjustment of the spacing between the outer periphery of each roller and the inner periphery of the die ring.
- 5. Apparatus according to claim 3 wherein said roller rotating means includes motor means connected to each roller shaft above said cover plate to rotate said shafts.
- 6. Apparatus according to claim 5 wherein said roller and die ring coupling means includes an internal gear carried by the inner ring of said bearing means and a spur gear mounted to each roller shaft and engaged with said internal gear.
- 7. Apparatus according to claim 6 wherein said internal gear is of substantially the same diameter as said die ring and each spur gear is of substantially the same diameter as the roller.
- 8. Apparatus according to claim 1 including a shroud surrounding the periphery of said die ring in spaced relation therewith, means mounting said shroud to said frame plate, means providing an outlet in said shroud, impeller means disposed between said die ring and said shroud for displacing extruded material away from said die ring wall and toward said outlet means, and means for rotating said impeller means.
- 9. Apparatus according to claim 8 wherein said impeller means includes blade means extending along the inside of the shroud and said impeller rotating means includes means mounting said blade means to said die ring for rotation therewith.
- 10. Apparatus according to claim 1 wherein each extrusion orifice has a predetermined cross-sectional area opening into the interior of the die ring and a larger cross-sectional area opening outwardly to the periphery of the die ring.
- 11. Rotary extrusion apparatus, comprising:
- frame means,
- a die ring carried in said frame means,
- said die ring having a cylindrical wall with extrusion orifices therein,
- means for feeding extrudable material into said die ring,
- bearing means surrounding said cylindrical wall adjacent one end of said die ring to mount said die ring for rotation in said frame means, said bearing means having an outer ring mounted to said frame means and an inner gearing ring connected to said die ring so that the die ring depends therefrom,
- at least a pair of rollers disposed inside said die ring for rotation in close proximity with the inside of said die ring wall,
- means for rotating said roller means, including a shaft connected to each roller and projecting away from said one end of said die ring and motor means for rotating each shaft,
- means coupling said roller means to said die ring to cause said rollers to rotate with said die ring and in the same direction, said coupling means including a spur gear mounted to each shaft and an internal gear carried by said inner gearing ring and meshing with said spur gears,
- whereby material fed into the die ring is extruded through the extrusion orifices upon rotation of the die ring and roller means.
- 12. Apparatus according to claim 11 including a shroud surrounding the periphery of the die ring and having a central outlet opposite said one end, and impeller means carried by said die ring for rotation therewith to scrape the interior of the shroud and to displace extruded material downwardly to and through said shroud outlet.
- 13. Apparatus according to claim 11 including a cover overlying said gears and said die ring and distributor means mounted to said cover for flowing extrudable material downwardly through said cover and into said die ring at spaced locations ahead of the rollers.
Parent Case Info
This is a divisional of application Ser. No. 713,349 filed Aug. 11, 1976 now U.S. Pat. No. 4,109,448.
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
713349 |
Aug 1976 |
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