A manufacturing method of a silicon carbide-based honeycomb structure, including a firing step of introducing extruded honeycomb formed bodies containing a silicon carbide-based component, together with firing members into a firing furnace, and firing the honeycomb formed bodies, to manufacture the silicon carbide-based honeycomb structure, wherein the firing members are formed by using a ceramic material containing 70 wt % or more of alumina, and the firing step further includes: an inert gas supplying step of supplying an inert gas to a furnace space of the firing furnace, and a gas adding step of adding a reducing gas to the furnace space.

A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process, and a firing process, wherein the cordierite forming raw material contains porous silica as an inorganic pore former, in a cumulative particle size distribution of the cordierite forming raw material, particle diameters (μm) of 10% by volume, 50% by volume, and 90% by volume of the total volume from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90, respectively, and a particle diameter (μm) of 50% by volume of the total volume from the small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, and the cordierite forming raw material and the organic pore former satisfy given expressions.

A manufacturing method of a honeycomb filter includes a kneaded material preparation process, a forming process and a firing process, wherein the cordierite forming raw material contains at least one of porous silica and fused silica, particle diameters (μm) of 10% by volume, 50% by volume and 90% by volume, from a small diameter side, are denoted by D.sub.(a) 10, D.sub.(a) 50 and D.sub.(a) 90 in a cumulative particle size distribution of the cordierite forming raw material, and a particle diameter (μm) of 50% by volume from a small diameter side is denoted by D.sub.(b) 50 in a cumulative particle size distribution of the organic pore former, D.sub.(b) 50 is 40 μm or less, and a cordierite forming raw material and an organic pore former satisfy given expressions.

The invention relates to a die (10) for the extrusion of catalyst molding, catalyst support molding, or adsorbent molding (60) in flow direction (32) of an extrudable composition from an entry side (12) to a discharge side (14) of the die comprising a shell (56) and comprising one or more channel-formers (18) which are displacers of the extrudable composition and which extend in flow direction of the extrudable composition, wherein the channel-formers (18) have been metal-printed.

It is preferable that this is free from cavities for receiving extrudable composition which extend at right angles to the flow direction (32) of the extrudable composition, and that this is free from connections running at right angles from channel-formers (18) to the interior side wall (22) of the die (10).

The invention further relates to a process for the production, by means of 3D metal printing, of a metal-printed die (10) for the extrusion of catalyst moldings/support moldings (60).

A carrier (230) for a honeycomb body (220) and a method for manufacturing a honeycomb body(220) are provided. The carrier (230) comprises a first side support (234), a second side support (236), and a flexible sheet (240) suspended between the first (234) and second (236) side supports for supporting the honeycomb body (220). The method comprises placing a green honeycomb body (220) on the flexible sheet (240) and transporting the green honeycomb body (220).

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.

An extrusion molding machine 1, including: an extruding portion 10 having a screw 11 and a barrel 12 capable of housing the screw; a molding portion 20 having one end and other end, the one end having a die 21, and the other end being connected to an extruding port 13 of the extruding portion 10; and a rectifier 30 arranged between the extruding portion 10 and the molding portion 20. A heat insulating member 40 is further arranged between the molding portion 20 and the rectifier 30.

An electrical discharge machining (EDM) electrodes and associated methods are provided. An EDM electrode includes a holder rotatable about a rotation axis and a plurality of electrode elements attached to the holder and circumferentially arranged around the rotation axis. Respective positions of the electrode elements are radially adjustable relative to the rotation axis.

A ceramic honeycomb body exhibiting a primary phase of aluminum titanate solid solution with a pseudobrookite structure, and a secondary phase of cordierite. The ceramic honeycomb body contains the aluminum titanate solid solution in an amount greater than or equal to 50 wt. % and cordierite in an amount greater than or equal to 20 wt. %. Low anisotropy is demonstrated by the primary phase of aluminum titanate solid solution by comprising an AT tangential/axial i-ratio1.35. Batch mixtures including spherical alumina and methods of manufacturing ceramic honeycomb bodies using the batch mixtures with spherical alumina are provided, as are other aspects.

In-line inspection and control system to in-situ monitor an extrudate during extrusion. A light beam illuminates a line on the outside circumference of the extrudate skin recording the curvature. A master profile of the illuminated defect-free skin is recorded and compared to successive monitoring of the illuminated skin. Differences from the comparison indicate skin and/or shape defects. A real-time feedback to automatically adjust process control hardware reduces or eliminates the skin and shape defects based on the monitoring and comparison.