公开(公告)号：WO2007027303A3

公开(公告)日：2007-03-08

申请号：PCT/US2006/027410

申请日：2006-07-13

Applicant: EXTRUSION DIES INDUSTRIES, LLC

Inventor： ULCEJ, John, A. ,  PITSCH, Dale, P. ,  CALLAHAN, Timothy, C.

IPC: B29C47/06 ,  B29C47/22

Abstract: An apparatus for the extrusion of a multi-layer parison comprises an extrusion blow molding head having a bore passing through the head with a diverter sleeve located within the bore. There is a first manifold in fluid communication with a first die inlet, and a second manifold in communication with a second die inlet. The first and second manifold substantially surround the diverter sleeve, wherein the first manifold is in fluid communication with a proximal end of a flow path formed by the diverter sleeve and the bore and the second manifold is in fluid communication with the flow path at a first location downstream from the proximal end of the flow path Lands having vanable width are positioned between the manifolds and the flow path. The manifolds and lands are sized so that a polymer melt is maintained in laminar flow through the flow path.