Title:
押出速度の調整方法
Document Type and Number:
Japanese Patent JP6437934
Kind Code:
B2
Abstract:
There is disclosed an adjusting method of an extrusion rate in which it is possible to select a most suitable perforated plate that achieves a uniformity of an extrusion rate of a forming material. In the adjusting method of the extrusion rate, a perforated plate 20 is superimposed on and attached to a forming die to achieve the uniformity of the extrusion rate of the forming material, the perforated plate 20 includes a plurality of through hole portions 23 bored at positions which face back holes 12 opened in a die back surface 13, the through hole portions are formed so that a hole diameter D of the through hole portion 23 decreases from a circumferential portion 24 of the perforated plate 20 toward a central portion 25 thereof, the adjusting method includes a perforated plate group consisting of a plurality of perforated plates 20 which are different in degree of diameter decrease of the hole diameter D, and the adjusting method includes a trial extrusion step of extruding the forming material in a state where the perforated plate 20 is not attached 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 20 to be suitably attached to the forming die on the basis of a matching relation between the shape of the formed body end face and the degree of the diameter decrease of the hole diameter D.
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Inventors:
Hiroaki Ito
Kazuhiko Hamazuka
Kazuhiko Hamazuka
Application Number:
JP2016002237A
Publication Date:
December 12, 2018
Filing Date:
January 08, 2016
Export Citation:
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
B28B3/26; B29C48/11; B29C48/30; B29C48/92
Domestic Patent References:
| JP10315213A | ||||
| JP2003104776A | ||||
| JP63112004U | ||||
| JP54116012A | ||||
| JP2006263947A |
Foreign References:
| WO2011158915A1 | ||||
| US20110049741 |
Attorney, Agent or Firm:
Ippei Watanabe
Shigeru Koike
Shigeru Koike