B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/722, 18/760,
B29C 47/86 (2006.01) B29C 47/12 (2006.01) B29C 47/30 (2006.01)
Patent
CA 1104780
ABSTRACT OF THE DISCLOSURE An extrusion pelleting process and apparatus is disclosed wherein the outermost portion of an extrusion orifice is surrounded by a heat reservoir maintained at a temperature significantly higher than the softening tempera- ture range of the polymer being extruded. The high tempra- ture heat reservoir constitutes a heat source from which individual extrusion orifices may be heated above the polymer's softening range to assist in melting frozen plugs of polymer which may block the orifice from time to time. Also disclosed is a heat flow control mechanism, in effect, for slowing the heat release from the reservoir to the individual extrusion orifices for economy of operation while still making available such high temperature source for unfreezing such plugs. The presence of a combination coolant and lubricating film at least partially comprised of nonvaporized liquid coolant between the material being extruded and the inner surface of its extrusion orifice which produces an extrusion in rod of strand-like form having a partially solidified exterior shell prior to cutting into individual pellets is believed to enable the operation of the outer platen of the subject device at significantly higher temperature than prior are devices without the adverse effects of polymer over- heating.
284876
Leesona Corporation
Macrae & Co.
LandOfFree
Die construction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Die construction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Die construction will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-211461