Global Consulting, Inc.

Eltech Systems Corporation

Charles M Hart

John J Bartholomew

James D Rogers

Harry L King

Rolls for generally conveying sheets, such as of steel or glass over a roller typically have a steel mandrel and fiber-containing roll cover, with the fiber roll cover pressed between end plates. In a roll end assembly including the end plates there is now provided an axial shaft beyond the end plate. The shaft incorporates a roll compression means. The compression means includes a compression element which element engages the end plate. Pressure from the compression means, which may be exerted from beyond the shaft, can thereby be transmitted to the fiber roll.

Tightening a fiber roll cover

A ceramic fiber insulation material is disclosed. It is prepared from a precursor blend generally comprising a gelled colloid and a ceramic fiber filler. Other filler, e.g., other fiber of refractory material, is contemplated, particularly when mixed with ceramic fiber. The gelled colloid ban be formed such as by mixing a gelling agent with a colloid of inorganic oxide or by blending anionic colloid with cationic colloid. The gelling agent is typically nonionic and water-soluble. The blend is trowelable, pumpable and possesses excellent adhesive characteristics including the ability to stick to -most surfaces, including metal surfaces. The blend is also virtually shrink-free during drying and, after drying, can provide the insulation material.

Ceramic fiber insulation material

A ceramic fiber insulation material is disclosed. It is prepared from a precursor blend generally comprising a gelled colloid and a ceramic fiber filler. Other filler, e.g., other fiber of refractory material, is contemplated, particularly when mixed with ceramic fiber. The gelled colloid ban be formed such as by mixing a gelling agent with a colloid of inorganic oxide or by blending anionic colloid with cationic colloid. The gelling agent is typically nonionic and water-soluble. The blend is trowelable, pumpable and possesses excellent adhesive characteristics including the ability to stick to most surfaces, including metal surfaces. The blend is also virtually shrink-free during drying and, after drying, can provide the insulation material.

A method is now disclosed for the making of compressed refractory fiber shapes, e.g., compressed ceramic fiber shapes, having a textured surface and an aggregate body. The shapes can be obtained by molding and therefore may be simple or complex. For the process, small discrete fragments of refractory fiber in accumulated form are suspended in a colloidal dispersion, such as the colloidal dispersion provided by colloidal silica. Colloidal mixtures, as of colloidal silica with colloidal alumina are also most serviceable. The fragments and the dispersion are mildly mixed so as not to thoroughly disperse the fiber fragments, but rather to form globules of the fiber in the resulting blend. The resulting material is shaped, e.g., molded under pressure, and usually dried while under pressure, which drying can be at elevated temperature. Resulting shaped objects, in addition to a textured surface and an aggregate body can have excellent thermal insulation property, and desirable flexibility as well as tensile strength.

Compressed shape of ceramic fiber

An insulating roller cover is now disclosed that provides a highly desirable combination of features. The cover is free from asbestos and is therefore of more desirable construction for handling and use. For the roller cover, at least substantially ceramic fiber is highly compressed, providing a dense and refractory, elevated temperature resistant insulating cover. The cover may itself serve as a load bearing surface; or may provide a foundation or protective media for annular discs or 10 sleeve members made of various, load bearing materials. These load bearing materials may be unable to resist direct contact with the shaft due to thermal shock or the differences in their respective expansion and contraction rates. Where impregnant is utilized with the highly compressed fiber, such will often comprise a colloidal substituent.

Insulating roll cover

Process for preparing compressed shape of ceramic fiber

An insulating roller cover includes a highly desirable combination of features. The cover is free from asbestos and is therefore of more desirable construction for handling and use. For the roller cover, at least substantially ceramic fiber is highly compressed, providing a dense and refractory, elevated temperature resistant insulating cover. The cover may itself serve as a load bearing surface; or may provide a foundation or protective media for annular discs or 10 sleeve members made of various, load bearing materials. These load bearing materials may be unable to resist direct contact with the shaft due to thermal shock or the differences in their respective expansion and contraction rates. Where impregnant is utilized with the highly compressed fiber, such will often comprise a colloidal substituent.

Highly compressed ceramic fiber conveyor rolls can provide desirable insulation coupled with extended wear for roller conveying of high temperature articles such as freshly made sheet glass. However, under harsh industrial conditions, as experienced with the conveying of heavy loads consistently at the upper end of operable temperature ranges, such ceramic fiber rolls may be subject to premature wear at the interface between an inner shaft and an outer ceramic fiber roll cover, as well as experience longitudinal roll cracking of the cover. It has now been found that both of these potential cover problems can be successfully addressed by placement within the cover of perforated, rigid disks. Such disks placed occasionally along the roll and within ceramic fiber cover, are particularly suitable for use with hardened covers, where the hardening is more concentrated towards the surface of the cover and the disks are present within a softer inner fiber core of the cover.

Wear resistant ceramic fiber conveyor rolls

An insulating roller cover is now disclosed that provides a highly desirable combination of features. The cover is free from asbestos and is therefore of more desirable construction for handling and use. For the roller cover, at least substantially ceramic fiber is highly compressed, providing a dense and refractory, elevated temperature resistant insulating cover. The cover may itself serve as a load bearing surface; or may provide a foundation or protective media for annular discs or sleeve members made of various, load bearing materials. These load bearing materials may be unable to resist direct contact with the shaft due to thermal shock or the differences in their respective expansion and contraction rates. Where impregnant is utilized with the highly compressed fiber, such will often comprise a colloidal substituent.

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New Castle, PA, United States of America

Charles M Hart