Method of producing honeycomb green body or fired article, bearer and method of producing the same

Patent metadata

Field	Value
Publication number	US-11459180-B2
Application number	US-201916256102-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Feb 9, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A bearer for bearing a honeycomb green body includes a solid main body provided with a groove in which a concave arc surface extends along one direction; and a single-layer or multi-layer sponge layer attached to the arc surface of the groove. The sponge layer is curved along the arc surface of the groove and has a bearing surface curved along the arc surface.

First claim

What is claimed is:

1. A method of producing a honeycomb green body, the method comprising:
an extruder extruding through a die a honeycomb green body so that a lattice of cell-walls is formed in accordance with a structure of the die, the lattice of cell-walls defining a plurality of cells extending in an extrusion direction of the honeycomb green body by the extruder, the number of cells per 1 cm 2 in a plane perpendicular to the extrusion direction being 30 to 180, and a thickness of the cell-walls being 0.05 to 0.30 mm; and
a bearer bearing at a vertically downward position the honeycomb green body extruded from the extruder, wherein
the bearer comprises:
a solid main body provided with a groove in which an arc surface recessed vertically downward extends along the extrusion direction, the solid main body including chemical wood; and
a single-layer or multi-layer sponge layer attached to the arc surface of the groove, the sponge layer being curved along the arc surface of the groove and having a bearing surface curved along the arc surface.

2. The method of producing a honeycomb green body according to claim 1 , wherein the sponge layer includes at least urethane or polyethylene.

3. The method of producing a honeycomb green body according to claim 1 , wherein the sponge layer is an open cell sponge layer.

4. The method of producing a honeycomb green body according to claim 1 , wherein a value of 25% hardness of the bearing surface of the sponge layer based on JIS K 6401 standard is equal to or less than 130N.

5. The method of producing a honeycomb green body according to claim 1 , wherein a thickness of the sponge layer is between 10 mm and 20 mm.

6. The method of producing a honeycomb green body according to claim 1 , wherein shore hardness of the arc surface is 40 to 70 HS.

7. The method of producing a honeycomb green body according to claim 1 , wherein the maximum depth of the groove is equal to or greater than 35 cm.

8. The method of producing a honeycomb green body according to claim 1 , wherein the sponge layer of a single layer is provided onto the recessed arc surface of the solid main body.

9. The method of producing a honeycomb green body according to claim 1 , further comprising:
cutting the honeycomb green body borne by the bearer.

10. The method of producing a honeycomb green body according to claim 1 , wherein a density of the solid main body is in a range of 0.1 g/cm 3 to 0.65 g/cm 3 .

11. The method of producing a honeycomb green body according to claim 1 , wherein a diameter of the honeycomb green body is equal to or greater than 70 cm.

12. The method of producing a honeycomb green body according to claim 11 , wherein the diameter of the honeycomb green body is equal to or greater than 115 cm.

13. The method of producing a honeycomb green body according to claim 12 , wherein the diameter of the honeycomb green body is equal to or greater than 170 cm.

14. A method of producing a honeycomb fired article including:
an extruder extruding through a die a honeycomb green body so that a lattice of cell-walls is formed in accordance with a structure of the die, the lattice of cell-walls defining a plurality of cells extending in an extrusion direction of the honeycomb green body by the extruder, the number of cells per 1 cm 2 in a plane perpendicular to the extrusion direction being 30 to 180, and a thickness of the cell-walls being 0.05 to 0.30 mm;
a bearer bearing at a vertically downward position the honeycomb green body extruded from the extruder, and
firing the honeycomb green body, wherein
the bearer comprises:
a solid main body provided with a groove in which an arc surface recessed vertically downward extends along the extrusion direction, the solid main body including chemical wood; and
a single-layer or multi-layer sponge layer attached to the arc surface of the groove, the sponge layer being curved along the arc surface of the groove and having a bearing surface curved along the arc surface.

Assignees

• Ngk Insulators Ltd

Inventors

• Hayakawa Yusuke
• Yamazaki Yasunori

Classifications

• B65G31/00

  Mechanical throwing machines for articles or solid materials · CPC title

• B28B13/04

  Discharging the shaped articles ({discharging tubular articles after shaping B28B21/90; } conveying systems for ceramic mouldings B65G49/08) · CPC title

• B28B3/269

  For multi-channeled structures, e.g. honeycomb structures · CPC title

• B28B11/16 Primary

  for extrusion {or for materials supplied in long webs} · CPC title

• C04B38/0009

  characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls · CPC title