EP 1478501 A1 20041124 - OPTIMIZED FLOW TO PREVENT CORE LAYER BREAKTHROUGH
Title (en)
OPTIMIZED FLOW TO PREVENT CORE LAYER BREAKTHROUGH
Title (de)
OPTIMIERTER STROM ZUR VERHINDERUNG VON KERNSCHICHTDURCHBRUCH
Title (fr)
OPTIMISATION DE L'ECOULEMENT DESTINEE A EMPECHER UNE PERCEE DE LA COUCHE CENTRALE
Publication
Application
Priority
- US 0302867 W 20030131
- US 35359602 P 20020131
Abstract (en)
[origin: WO03064133A1] A method of co-extruding a plurality of plastic material flowing streams into a mold cavity produces a molded product. A flow velocity profile (120) at the end of a nozzle (100) having a throttle pin (110) is provided, including a flow velocity profile (160) near the flow front (140) in an article (130) as the flow front (140) moves at an average velocity. The interior core material (170) is injected along a streamline having a flow velocity greater than an average velocity of the combined streams, but less than the maximum velocity at the zero gradient (150), and the interior stream does not flow along or across a zero-velocity-gradient streamline of the combined streams.
IPC 1-7
IPC 8 full level
B29C 45/16 (2006.01)
CPC (source: EP)
B29C 45/1642 (2013.01); B29C 45/1646 (2013.01)
Citation (search report)
See references of WO 03064133A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
US 0302867 W 20030131; EP 03706008 A 20030131