Improved Co-injection Press Nozzle Assembly
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Publishing Venue
IBM
Related People
Ableitner, DE: AUTHOR [+5]
Abstract
Disclosed is a method of controlling plastic material leakage on the shut-off needles of the coinjection press nozzle assembly by use of compression rings to prevent needles from binding or stopping.
Improved Co-injection Press Nozzle Assembly
Disclosed is
a method of controlling plastic material leakage
on the shut-off needles of the coinjection press nozzle assembly by
use of compression rings to prevent needles from binding or stopping.
The addition of compression rings in
strategic locations of
shut-off needles will allow maintaining enough clearance between
needles and nozzle body to keep needles moving freely but will not
allow plastic material to pass between the bearing surfaces out the
back of needles causing a binding problem.
The
compression ring is a split ring that can be slipped over
the needle into a groove. (See Figs. 1
and 2.)
Disclosed anonymously.