Setter for firing, and method for producing honeycomb structure using setter for firing

Patent metadata

Field	Value
Publication number	US-10969175-B2
Application number	US-201816043412-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Feb 23, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A setter for firing in a plate which is used for firing a honeycomb formed body and interposed between the honeycomb formed body and a shelf plate, wherein the setter for firing has a setter lower surface section facing the shelf plate, the setter lower surface section including: a central region part formed by a region including a lower surface center of the setter lower surface section; and a peripheral region part formed by a peripheral region of the central region part, and the peripheral region part has at least four or more setter groove parts each having a recessed cross sectional shape and extending radially from the lower surface center respectively in a direction from a boundary with the central region part toward a setter outer circumferential section.

First claim

The invention claimed is:

1. A setter for firing in a plate which is used for firing a honeycomb formed body and interposed between the honeycomb formed body and a shelf plate, wherein
the setter for firing has a setter lower surface section facing the shelf plate, the setter lower surface section including:
a central region part formed by a region including a lower surface center of the setter lower surface section; and
a peripheral region part formed by a peripheral region of the central region part, and
the peripheral region part has at least four or more setter groove parts each having a recessed cross sectional shape and extending radially from the lower surface center respectively in a direction from a boundary with the central region part toward a setter outer circumferential section without intersecting another setter groove part.

2. The setter for firing according to claim 1 , wherein
the setter groove parts adjacent to each other are arranged in the peripheral region part with a same radiation angle from the lower surface center, and extend linearly from the boundary toward the setter outer circumferential section.

3. The setter for firing according to claim 1 , wherein
the central region part is formed in a circular shape and has a diameter in a range of 10 mm to 35 mm.

4. The setter for firing according to claim 1 , wherein
the setter for firing is formed in an elliptical shape, and
the central region part is formed in an elliptical shape similar to that of the setter for firing and has a minor axis in a range of 10 mm to 35 mm.

5. The setter for firing according to claim 1 , wherein
each of the setter groove parts has a groove width in a range of 0.5 mm to 2.0 mm.

6. The setter for firing according to claim 1 , wherein
a ratio of a groove area of the setter groove parts to a total area of the setter lower surface section is at least 1.0% or more.

7. The setter for firing according to claim 1 , wherein
a setter upper surface section opposing the setter lower surface section and having the honeycomb formed body placed thereon includes:
a flat part in contact with at least a portion of a formed body end face of the honeycomb formed body; and
a raised part in a curved surface shape raised bulgingly from the setter outer circumferential section toward the flat part.

8. A method for producing a honeycomb structure using a setter for firing, the method comprising:
a molding step of extruding a honeycomb formed body from a molding material; and
a firing step of firing the honeycomb formed body obtained by the molding step,
the firing step including
a shelf plate arrangement step of arranging a shelf plate in a firing furnace,
a setter for firing installation step of installing the setter for firing on the arranged shelf plate with a setter lower surface section facing the shelf plate, the setter for firing including a central region part formed by a region including a lower surface center of the setter lower surface section and a peripheral region part formed by a peripheral region of the central region part, and the peripheral region part having at least four or more setter groove parts formed therein each having a recessed cross sectional shape and extending radially from the lower surface center respectively in a direction from a boundary with the central region part toward a setter outer circumferential section without intersecting another setter groove part, and
a honeycomb formed body placement step of placing the honeycomb formed body on the setter for firing with one formed body end face directed downwardly and placing the honeycomb formed body in the firing furnace with the setter for firing interposed between the honeycomb formed body and the shelf plate.

9. The method for producing a honeycomb structure using a setter for firing according to claim 8 , wherein
the setter for firing installation step uses a sucking-conveying device, and
further includes a sucking-conveying step of closely contacting a suction section of the sucking-conveying device to a setter upper surface section of the setter for firing positioned at an uppermost stage of a stacked body in which a plurality of the setters for firing are stacked in multiple stages and conveying the setter for firing in a decompression state between the suction section and the setter upper surface section.

Assignees

• Ngk Insulators Ltd

Inventors

• Tokunaga Takeshi

Classifications

• C04B2235/9623

  Ceramic setters properties · CPC title

• C04B35/185

  Mullite {3Al2O3-2SiO2} · CPC title

• C04B2235/963

  Surface properties, e.g. surface roughness · CPC title

• C04B2235/95

  Products characterised by their size, e.g. microceramics · CPC title

• C04B2235/94

  Products characterised by their shape · CPC title