A method for producing abrasive particles includes the following method steps: i. preparing a starting mixture containing at least aluminium hydroxide, which mixture can be converted at least into aluminium oxide by means of heat treatment; ii. extruding the starting mixture to form an extrudate; iii. separating the extrudate into intermediate particles; and iv. heat-treating the intermediate particles. The intermediate particles are converted into abrasive particles that contain aluminium oxide, and the extrudate and/or the intermediate particles is/are subjected to an input of energy that is asymmetrical with respect to the geometry of the extrudate and/or the intermediate particles.

A method for producing abrasive particles includes the following method steps: i. preparing a starting mixture containing at least aluminium hydroxide, which mixture can be converted at least into aluminium oxide by means of heat treatment; ii. extruding the starting mixture to form an extrudate; iii. separating the extrudate into intermediate particles; and iv. heat-treating the intermediate particles. The intermediate particles are converted into abrasive particles that contain aluminium oxide, and the extrudate and/or the intermediate particles is/are subjected to an input of energy that is asymmetrical with respect to the geometry of the extrudate and/or the intermediate particles.

A manufacturing method of a honeycomb structure, including a vertical extrusion process, wherein the vertical extrusion process includes: an extrusion step of extruding the molding compound in the vertically downward direction from an extrusion die attached to an extruder; a honeycomb formed body receiving step in which a transfer pallet is placed at a position near the extrusion die, and a honeycomb formed body formed by continuously extruding the molding compound in the extrusion step is received and supported from below by the transfer pallet; and a pallet lowering step of lowering the transfer pallet while receiving and supporting the honeycomb formed body in synchronization with an extrusion speed of the molding compound from the extrusion die, and the transfer pallet is constituted of a laminate structure including: a pallet substrate; and a tabular mesh plate.

The present invention relates to a manufacturing method of construction aggregates using incineration ash, in which aggregates for construction, such as gravel or sand are manufactured using incineration ashes produced during the incineration process of household waste, food waste, sewage waste, construction and industrial waste, etc. while realizing eco-friendly manufacturing environments, reducing costs through successive steps and reducing and discharging harmful gases produced during firing.

The present invention relates to a manufacturing method of construction aggregates using incineration ash, in which aggregates for construction, such as gravel or sand are manufactured using incineration ashes produced during the incineration process of household waste, food waste, sewage waste, construction and industrial waste, etc. while realizing eco-friendly manufacturing environments, reducing costs through successive steps and reducing and discharging harmful gases produced during firing.

Provided is a method for producing a sheet molding compound including an aging step for thickening a sheet-like resin compound. The method includes applying a load of 0.2 to 50 g/cm.sup.2 to at least part of the sheet-like resin compound for 1 hour or more under a condition of an internal temperature of 20 to 120° C. in the aging step. A sheet molding compound obtained from this method for producing a sheet molding compound and its molded article have excellent carbon fiber impregnability and the like and can thus suitably be used for the exteriors, structures, and the like of automotive components, railway vehicle components, aerospace vehicle components, ship components, housing equipment components, sports components, light vehicle components, construction and civil engineering components, OA equipment, and the like.

Provided is a method for producing a sheet molding compound including an aging step for thickening a sheet-like resin compound. The method includes applying a load of 0.2 to 50 g/cm.sup.2 to at least part of the sheet-like resin compound for 1 hour or more under a condition of an internal temperature of 20 to 120° C. in the aging step. A sheet molding compound obtained from this method for producing a sheet molding compound and its molded article have excellent carbon fiber impregnability and the like and can thus suitably be used for the exteriors, structures, and the like of automotive components, railway vehicle components, aerospace vehicle components, ship components, housing equipment components, sports components, light vehicle components, construction and civil engineering components, OA equipment, and the like.

A system and method for vibratory cutting, including in the manufacture of ceramic honeycomb bodies. The apparatus includes a transducer configured to generate vibrations with respect to an axial direction. A cutting element is configured to receive and oscillate axially in response to the vibrations. The cutting element has a blade having a width, an axial length, and a thickness. A cutting plane of the blade is defined with respect to the width and the axial length. The blade has opposing side surfaces that extend parallel to the cutting plane. The thickness extends perpendicular to the cutting plane between the opposing side surfaces. A set of fluid bearings are configured to exert fluid pressure on each of the opposing side surfaces to constrain vibrations of the blade oriented in directions transverse to the cutting plane.

A system and method for vibratory cutting, including in the manufacture of ceramic honeycomb bodies. The apparatus includes a transducer configured to generate vibrations with respect to an axial direction. A cutting element is configured to receive and oscillate axially in response to the vibrations. The cutting element has a blade having a width, an axial length, and a thickness. A cutting plane of the blade is defined with respect to the width and the axial length. The blade has opposing side surfaces that extend parallel to the cutting plane. The thickness extends perpendicular to the cutting plane between the opposing side surfaces. A set of fluid bearings are configured to exert fluid pressure on each of the opposing side surfaces to constrain vibrations of the blade oriented in directions transverse to the cutting plane.

A roof tile containing fibers which satisfy the following requirements (1) to (3): (1) to have an average fiber diameter of 50 μm or less; (2) to have an aspect ratio of 50 to 2000; and (3) to have three or less buckled portions per fiber.