An apparatus and method of manufacturing a porous ceramic segmented honeycomb body (340,340) comprising axial channels (216) extending from a first end face (220) to a second end face (224). A plurality of porous ceramic honeycomb segments (204) is moved axially past respective apertures (110) of an adhesive applying device (100). Adhesive (118) is applied through openings (126) in the adhesive applying device (100) onto peripheral axial surfaces of each porous ceramic honeycomb segment (204). The plurality of porous ceramic honeycomb segments (204) enters a wide opening (318) of a tapered chamber (314) and exits a narrow opening (322) of the tapered chamber (314); a tapered wall (326) from the wide opening (318) to the narrow opening (322) presses the plurality of porous ceramic honeycomb segments (204) together forming the porous ceramic segmented honeycomb body (340,340). The adhesive (118) on the peripheral axial surfaces between respective porous ceramic honeycomb segments (204) is distributed by the pressing.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A manhole base liner (1), in particular for a wastewater manhole, has a base body (2) which comprises a tread surface (3) and at least one pipe connection opening (5). The base body (2) is produced in one piece from flexible material with a wall thickness, with which it can be bent together substantially arbitrarily in at least partial regions.

A control system for an axial skinning apparatus (100), including: a force to cause a ceramic honeycomb part (110) to pass through the skinning apparatus (100); a force that urges flowable cement on to the ceramic honeycomb part (110); a sensor to detect the force on the cement; a sensor to detect the force on the ceramic part; and a controller (300) which receives: a signal from the sensor on the flowable cement, a signal from the sensor on the ceramic part (110), or both, and the controller (300) controls the pressure set point (310) of the cement source based on one or both of the received signals, and the controller (300) adjusts control parameters using feedback control and pseudo feed forward control. A method of using the axial skinning apparatus (100) is also disclosed.

A method for producing a ceramic honeycomb structure comprising a ceramic honeycomb body having large numbers of longitudinal cells partitioned by porous cell walls, and a peripheral wall formed on a peripheral surface of the ceramic honeycomb structure, comprising the steps of extruding a moldable ceramic material to form a honeycomb-structured ceramic green body; machining a peripheral portion of the green body or a sintered body obtained from the green body to remove part of cell walls in the peripheral portion, thereby obtaining the ceramic honeycomb body having longitudinal grooves on the peripheral surface; applying a coating material to the peripheral surface of the ceramic honeycomb body to form the peripheral wall, as well as to peripheral portions of both end surfaces of the ceramic honeycomb body; and inserting the coating material applied to the peripheral portions of both end surfaces into peripheral cells, with partially remaining on the peripheral portions.

A ceramic honeycomb body having a skin that does not block partial cells extending from an inlet face to an outlet face at an outer periphery portion of the body. A method of making the ceramic honeycomb body having the skin includes disposing a sheet on an outer peripheral wall of a honeycomb core having an outer surface spaced apart from interiors of the partial cells and skinning the body having the sheet disposed thereon. Subsequent curing in the method bonds the skin to cell walls of the body spaced apart from interiors of the partial cells.

A ceramic honeycomb body having a skin that does not block partial cells extending from an inlet face to an outlet face at an outer periphery portion of the body. A method of making the ceramic honeycomb body having the skin includes disposing a sheet on an outer peripheral wall of a honeycomb core having an outer surface spaced apart from interiors of the partial cells and skinning the body having the sheet disposed thereon. Subsequent curing in the method bonds the skin to cell walls of the body spaced apart from interiors of the partial cells.

A process for operating an axial skinning apparatus for continuous manufacture of skinned ceramic honeycomb parts, including: determining the physical process parameters of the apparatus including: the rheology of the flowable skin cement; the geometry of the part to be skinned; and the geometry of the annulus gap of the skinning chamber; and calculating a plurality of dimensionless pressure gradient values (Lambda ()) according to the formula (1): $\begin{array}{cc}=\frac{\left(P\right)R}{2mL}{\left(\frac{R}{V}\right)}^n& \left(1\right)\end{array}$ where P, P, R, V, L, and m and n are as defined herein; plotting a plurality of manifold pressures versus a plurality of part velocities; and selecting at least one operating window based on the skin quality of a plurality of preliminarily skinned parts.

A skinning apparatus and a method of skinning a porous ceramic. The apparatus includes an axial skinning manifold. The axial skinning manifold includes a curved adaptive pipe to flow cement in a circumferential direction from an inlet at a first position and through an adaptive opening along an inner bend of the curve through a land channel disposed along the inner bend. The land channel emits the cement at a constant velocity from a land opening extending proximate the first position to a second position spaced apart from the first position. The land outlet emits cement at a constant velocity around the outer periphery of the porous ceramic to dispose a uniform skin thereon as the porous ceramic moves axially relative to the land outlet.

A skinning apparatus and a method of skinning a porous ceramic. The apparatus includes an axial skinning manifold. The axial skinning manifold includes a curved adaptive pipe to flow cement in a circumferential direction from an inlet at a first position and through an adaptive opening along an inner bend of the curve through a land channel disposed along the inner bend. The land channel emits the cement at a constant velocity from a land opening extending proximate the first position to a second position spaced apart from the first position. The land outlet emits cement at a constant velocity around the outer periphery of the porous ceramic to dispose a uniform skin thereon as the porous ceramic moves axially relative to the land outlet.