EP 1069982 A1 20010124 - EXTRUSION DIE FOR BIODEGRADABLE MATERIAL WITH DIE ORIFICE MODIFYING DEVICE AND FLOW CONTROL DEVICE
Title (en)
EXTRUSION DIE FOR BIODEGRADABLE MATERIAL WITH DIE ORIFICE MODIFYING DEVICE AND FLOW CONTROL DEVICE
Title (de)
EXTRUSIONSDÜSE FÜR BIOLOGISCH ABBAUBERES MATERIAL MIT MODIFIZIERUNGSANORDNUNG FÜR DIE DÜSENÖFFNUNG UND DURCHFLUSSREGELVORRICHTUNG
Title (fr)
FILIERE D'EXTRUSION POUR MATERIAU BIODEGRADABLE A DISPOSITIF MODIFICATEUR DE L'ORIFICE DE LA FILIERE ET DISPOSITIF REGULATEUR DE DEBIT
Publication
Application
Priority
- US 9904774 W 19990304
- US 3541898 A 19980305
- US 3556098 A 19980305
- US 3541998 A 19980305
- US 3541798 A 19980305
- US 3560598 A 19980305
- US 3556698 A 19980305
- US 3520098 A 19980305
Abstract (en)
[origin: WO9944806A1] An extrusion die for extruding biodegradable material, the extrusion die comprising: a mandrel (30); an outer member (40) positioned near the mandrel; an extrusion orifice (5) between the mandrel and the outer member; a member in communication with at least one defining member of the extrusion orifice, wherein the member is capable of producing relative movement between the outer member and the 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 which positions the outer member and the mandrel relative to each other. An improved process for the extrusion of biodegradable material wherein the extrusion comprises flowing the biodegradable material in a flow direction through an orifice, the improvement comprising: moving the biodegradable material in a direction having a component transverse to the flow direction during extrusion; controlling the flow rate of biodegradable material through the extrusion die during extrusion, wherein the controlling comprises adjusting the head pressure of the biodegradable material in the extrusion die and adjusting at least one cross-sectional area of a biodegradable material flow path within the extrusion die; and modifying the orifice geometry.
IPC 1-7
IPC 8 full level
B29C 47/24 (2006.01); B29C 48/10 (2019.01); B29C 48/33 (2019.01); B29C 69/02 (2006.01)
CPC (source: EP US)
B29C 48/08 (2019.01 - EP US); B29C 48/10 (2019.01 - EP US); B29C 48/33 (2019.01 - EP US); B29K 2003/00 (2013.01 - EP)
Citation (search report)
See references of WO 9944806A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB IE IT LI NL PT SE
DOCDB simple family (publication)
WO 9944806 A1 19990910; AU 3068799 A 19990920; CA 2323157 A1 19990910; CA 2323157 C 20080930; EP 1069982 A1 20010124; JP 2002514522 A 20020521; JP 2009179060 A 20090813
DOCDB simple family (application)
US 9904774 W 19990304; AU 3068799 A 19990304; CA 2323157 A 19990304; EP 99912276 A 19990304; JP 2000534387 A 19990304; JP 2009094441 A 20090408