Metal honeycomb structure

摘要

The invention provides a metal honeycomb core body used as the principal structural element of an exhaust gas cleaning unit excellent in various performances and economy that is provided with a corrugated band member, that is a structural member of a metal honeycomb core body having a special waveform structure. The invention provides a metal honeycomb core body having honeycomb structure fabricated by bringing corrugated band members (1) and planar band members (2) made of thin-walled metal sheet alternately into contact. The corrugated band member (1) has a waveform structure obtained by using a waveform of an imaginary corrugated sheet (1') having crests and troughs which are in contact with a planar band member (2) and composed of a connected waveform having a desired waveheight (h) and one period length (lambd'). A one period length (lambd) of a new waveform is formed comprising the area (1a) where the waveform of the imaginary corrugated sheet (1') is in contact with the planar band member (2) on at least one pair of an adjacent crest and trough of a wave. The area (1b) which is not in contact with the planar band member (2) is connected adjacently to the area (1a) which is in contact with the planar band member (2). The area (1c) of at least one end of which is in contact with the planar band member (2) and is connected adjacently to the noncontact area (1b). An area (1b) which is not in contact with the planar band member (2) is formed so as to have a height of about one half (½.h) of the waveheight (h) of the imaginary corrugated sheet (1'). The new waveform is constituted by connecting the three areas (1a, 1b, and 1c) to form a waveform of one period length (lambd) by use of the waveform of the imaginary corrugated sheet (1').