Claims
- 1. An extrusion die for extruding biodegradable material, said extrusion die comprising:
a cylindrical mandrel; a cylindrical outer ring positioned around said mandrel; an annular extrusion orifice between said mandrel and said outer ring; a spray nozzle extending from said cylindrical mandrel; and a member in communication with at least one defining member of said annular extrusion orifice which produces angular relative movement between said outer ring and said mandrel, wherein the relative movement has a component transverse to an extrusion direction of biodegradable material through the extrusion orifice.
- 2. An extrusion die as claimed in claim 1, further comprising a mounting plate having a flow bore which conducts biodegradable material toward said extrusion orifice, wherein said outer member is rotatably mounted to said mounting plate, and wherein said mandrel is fixedly mounted to said mounting plate.
- 3. An extrusion die as claimed in claim 1, further comprising a flow control device which controls flow of biodegradable material through the extrusion die.
- 4. An extrusion die as claimed in claim 3, wherein an inner surface of said outer ring is conically shaped, and wherein the flow control device comprises a mechanism which translates said outer ring to adjust the size of said annular extrusion orifice.
- 5. An extrusion die as in claim 3, wherein said flow control device comprises a flow control channel which throttles flow of the biodegradable material through the die, and said extrusion die further comprises a mounting plate and at least one spacer, wherein said mandrel is attached to said mounting plate with said at least one spacer between, wherein said mounting plate and said mandrel define said flow control channel.
- 6. An extrusion die as in claim 1, further comprising a positioning device which positions said outer ring and said mandrel relative to each other, wherein said positioning device modifies a geometry of said extrusion orifice.
- 7. An extrusion die as in claim 6, further comprising an apparatus for moving said positioning device and an apparatus for fixing the position of said positioning device.
- 8. An extrusion die as claimed in claim 7, wherein said apparatus for fixing the position of said positioning device comprises a plurality of locking apparatuses positioned equidistant from each other around said positioning device.
- 9. An extrusion die as claimed in claim 7, further comprising a mounting plate to which said mandrel is attached, wherein said apparatus for moving said positioning device comprises a lug and a bolt wherein said lug is attached to said mounting plate, wherein said bolt is supported by said lug, and wherein said bolt engages an outer die structure of said positioning device.
- 10. An extrusion die as claimed in claim 7, wherein said apparatus for moving said positioning device comprises a plurality of shifting apparatuses positioned equidistant from each other around said positioning device.
- 11. An extrusion die for extruding biodegradable material, said extrusion die comprising:
a cylindrical mandrel; a cylindrical outer ring positioned around said mandrel; an annular extrusion orifice between said mandrel and said outer ring; a spray nozzle extending from said cylindrical mandrel; a member in communication with at least one defining member of said annular extrusion orifice which produces angular relative movement between said outer ring and said mandrel, wherein the relative movement has a component transverse to an extrusion direction of biodegradable material through the extrusion orifice; a flow control device which controls flow of biodegradable material through the extrusion die; and a positioning device of said outer ring and said mandrel relative to each other, wherein said positioning device modifies a geometry of said extrusion orifice.
RELATED APPLICATIONS
[0001] This application is a divisional of U.S. patent application Ser. No. 09/782,451 filed on Feb. 13, 2001, and entitled ROTATING EXTRUSION DIE WITH SPRAY NOZZLE.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09782451 |
Feb 2001 |
US |
Child |
10463960 |
Jun 2003 |
US |