Burr & Brown, PLLC
Adjusting method of extrusion rate
In the adjusting method of the extrusion rate, a perforated plate is superimposed on and attached to a forming die, the perforated plate includes a plurality of through hole portions, the adjusting method includes a perforated plate group consisting of a plurality of perforated plates which are different in degree of diameter decrease of the hole diameter, and the adjusting method includes a trial extrusion step of extruding the forming material to form a trial honeycomb formed body, a shape measuring step of measuring a shape of a formed body end face of the trial honeycomb formed body, and a perforated plate selecting step of selecting the perforated plate to be suitably attached to the forming die.
NGK Insulators, Ltd.
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B29C B29C B29C B29C B29C B29C B28B
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Kazuhiko Hiroaki
Hamatsuka Ito