Application jig and method of manufacturing honeycomb structured body

A method of manufacturing a honeycomb structured body, comprising:

• providing an application jig comprising:
• a first principal surface;
• a second principal surface provided on an opposite side of the first principal surface;
• and
• an opening section penetrating from the first principal surface to the second principal surface and comprising:
• a first opening section provided on the first principal surface side;
• and
• a second opening section provided on the second principal surface side and having a substantially constant diameter from the second principal surface toward a boundary line between the first opening section and the second opening section, the first opening section having a diameter gradually decreasing from the first principal surface toward the boundary line;
• putting a sealing material paste on a peripheral surface of a pillar-shaped ceramic block;
• setting the application jig in such a manner that the first principal surface faces upward and the second principal surface faces downward;
• placing the ceramic block inside the second opening section of the application jig;
• and
• passing the ceramic block through the opening section of the application jig so that a face defining the second opening section spreads an entire peripheral surface of the ceramic block with the sealing material paste to manufacture a honeycomb structured body with a peripheral sealing material layer formed on the peripheral surface of the ceramic block.