Patent ID: 7294301
Filing Date: 2007-11-13
Classification: B28B,B29C,B29D,B29L

Abstract:
1. A method of manufacturing a honeycomb structure, comprising the steps of: extruding a first material supply through a die to form a honeycomb log having a plurality of intersecting, interior walls forming parallel cell channels, and throughout the step of extruding, intermittently regulating flow of a second batch material supply into the cell channels, wherein the die includes the step of regulating includes periodically injecting a portion of the cell channels with the second batch material through the secondary feedholes as the honeycomb log is being extruded; and cutting the honeycomb log at an interface between the second batch material and cell channels, such that there results a honeycomb structure having a first portion of end-plugged cell channels at one end and a second portion of end-plugged cell channels at the other end, but not corresponding to the first portion.