Abstract: Sand for a casting mold including sand, a binder, and an inorganic compound particle having poor water solubility and generating a gas, which is at least one of water vapor or carbon dioxide gas, by heat from a molten metal.

Abstract: Provided is a cleaning sheet which is capable of being mounted upon a plurality of retaining instruments, with a housing part thereof comprising an aperture and a housing space. The housing space further comprises a first housing region which is suited to a first retaining instrument, and a second housing region which is suited to a second retaining instrument.

Abstract: A cleaning sheet comprises an aperture and a housing space. The housing space further comprises a first space region, and a second space region which is shorter than the first space region. The first space region is disposed closer to the aperture than the second space region.

Abstract: To provide a cleaning tool exhibiting excellent cleaning effectiveness. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part configured so as to be capable of cleaning an object to be cleaned; a base part; and insertion parts through which holding parts of the holding tool are inserted. The brush part is configured so as to be provided with: a first cleaning region; a second cleaning region; and a bent region which is sandwiched therebetween, and which is formed by being bent by an end of the base part.

Abstract: To provide a cleaning tool which, upon attachment of a cleaning body to a cleaning-body holder, feels good to use. The present invention relates to a cleaning tool comprising a holding tool for holding a cleaning sheet. In the present invention, a first extremity virtual line and a second extremity virtual line are formed. The first extremity virtual line is the shortest line linking a center line in the length direction and a first extremity of a holding part. The second extremity virtual line is the shortest line linking the center line in the length direction and a second extremity of a protruded part. The first extremity virtual line is formed so as to be longer than the second extremity virtual line.

Abstract: Sand for a casting mold including sand, a binder, and an inorganic compound particle having poor water solubility and generating a gas, which is at least one of water vapor or carbon dioxide gas, by heat from a molten metal.

Abstract: By mixing, stirring and kneading, with water glass (11) as a binder, sand (7), a surfactant (9), and water (10), foamed sand (S) is generated. The foamed sand (S) is packed in a cavity of a metallic mold and solidified to form a sand mold. By using the sand mold, aluminum is cast. By using water glass that is an inorganic binder, during casting, harmful gas and odor are not generated. Further, when a molar ratio n of water glass (Na2O nSiO2 mH2O) is adjusted in the range of 0.65 to 1.30, a quantity of water (H2O) generated by heating water glass with a high temperature melt during casting can be suppressed. Thereby, hydrogen gas (H2) according to a reaction between water (H2O) and aluminum (Al) can be suppressed from being generated and casting quality can be improved.

Abstract: A mold-making device may include a stirring device including a stirring tank and at least one stirring blade. The stirring device may further include a packing port that is configured to open and close on a bottom of the stirring tank. The stirring device may stir a particulate aggregate and at least one additive by rotating the at least one stirring blade within the stirring tank to yield an admixture. A forming mold may communicate with the packing port and mold the admixture into a predetermined shape. A packing device may compress a surface of the admixture within the stirring tank and pack the admixture into the forming mold via the packing port.

Abstract: A sand-mold molding method for producing a molded article obtained by packing foamed sand may include stirring a binder with an aggregate to form foamed sand; forming a cavity via clamping a metallic mold closed; packing the foamed sand into the cavity of the metallic mold and then heating and solidifying the foamed sand; and opening the metallic mold partially to provide a gap in the metallic mold while maintaining the cavity.

Abstract: Provided is a cleaning tool with which a cleaning sheet can be efficiently used during cleaning. A cleaning sheet is provided with holding spaces through which a cleaning-body holder is inserted. The cleaning-body holder is provided with: cleaning-body holding parts which are inserted into the holding spaces to hold the cleaning sheet; and a handle part which is connected to the cleaning-body holding parts, and which is to be held by a user. The cleaning-body holding parts are provided with: base parts connected to the handle part; tip parts at an opposite side to the base parts; and intermediate parts which extend from the base parts towards the tip parts. In a state in which the cleaning-body holding parts have been inserted into the holding spaces to hold the cleaning sheet, sections of the cleaning sheet corresponding to the intermediate parts are configured so as to be thicker, in the thickness direction of the cleaning sheet, than sections of the cleaning sheet corresponding to the base parts.

Abstract: To provide a cleaning tool exhibiting excellent usability. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part capable of cleaning an object to be cleaned; a base part; and insertion parts for the holding tool. The brush part is formed from: a first brush part provided to one side of the base part; and a second brush part provided to another side of the base part. The first brush part and the second brush part are provided with a first region and a second region which each have different configurations.

Abstract: To provide a production method for a cleaning tool and a cleaning body with which the attachment of a holding tool to the cleaning body is facilitated. Provided is a production method for a cleaning tool provided with a cleaning sheet, and a holding tool for holding the cleaning sheet. The cleaning sheet is provided with: a base part; and a first fiber assembly which is bonded to the base part. The production process includes a step in which tensile force imparted to the first fiber assembly is released, and fibers in a state of having been stretched by the tensile force are shrunk to form bent regions in the base part.

Abstract: To provide a cleaning tool exhibiting excellent cleaning effectiveness. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part configured so as to be capable of cleaning an object to be cleaned; a base part; and insertion parts through which holding parts of the holding tool are inserted. The brush part is configured so as to be provided with: a first cleaning region; a second cleaning region; and a bent region which is sandwiched therebetween, and which is formed by being bent by an end of the base part.

Abstract: To provide a cleaning tool exhibiting excellent cleaning effectiveness. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part capable of cleaning an object to be cleaned; a base part; and insertion parts for the holding tool. The brush part is provided with a first contact region and a second contact region. The second contact region is provided with a lower region formed so as to be lower than the first contact region in the thickness direction. The lower region is used as a guide region capable of guiding dust on the object to be cleaned towards the adjacent first contact region.

Abstract: To provide a cleaning tool with which a cleaning sheet can be efficiently used during cleaning. The present invention relates to a cleaning tool comprising a holding tool for holding a cleaning sheet. In a state in which holding parts of the holding tool are inserted into insertion parts of the cleaning sheet, tension imparting parts of the holding parts impart tensile force on second regions of the cleaning sheet to form tension portions, and sheet members in the tension portions in a length-intersecting direction are moved in directions in which first regions are disposed.

Abstract: To provide a cleaning tool which, upon attachment of a cleaning body to a cleaning-body holder, feels good to use. The present invention relates to a cleaning tool comprising a holding tool for holding a cleaning sheet. In the present invention, a first extremity virtual line and a second extremity virtual line are formed. The first extremity virtual line is the shortest line linking a centre line in the length direction and a first extremity of a holding part. The second extremity virtual line is the shortest line linking the centre line in the length direction and a second extremity of a protruded part. The first extremity virtual line is formed so as to be longer than the second extremity virtual line.

Abstract: To provide a cleaning tool exhibiting excellent cleaning effectiveness. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part capable of cleaning an object to be cleaned; a base part; and insertion parts for the holding tool. The brush part is configured from a fiber, and is provided with first brush regions and second brush regions. The second brush regions are provided with protruded regions configured so as to be longer than the first brush regions.

Abstract: To provide a cleaning tool exhibiting excellent cleaning effectiveness. The present invention relates to a cleaning tool comprising a cleaning sheet, and a holding tool for holding said cleaning sheet. The cleaning sheet is provided with: a brush part; a base part; and insertion parts through which holding parts of the holding tool are inserted. The brush part is provided with a plurality of strip pieces. The strip pieces include first strip pieces, and second strip pieces having a higher rigidity than the first strip pieces. The second strip pieces are provided with scrape-out parts capable of scraping out dust on an object to be cleaned.

Abstract: In a wet sheet, hydrophobic outer layer sheets are disposed on both sides of the hydrophilic inner layer sheet impregnated with cleaning solution. Each of intermediate layer sheets is folded over so as to form a space having an opening. End portions of the inner layer sheet are inserted into the spaces of the intermediate layer sheets. The inner layer sheet can come in contact with the outer layer sheet via a space between the intermediate layer sheets. With such a construction, sufficiently high frictional force acts between the inner layer sheet and the outer layer sheet.

Abstract: First, a supply device supplies a foamed kneaded material into a cylinder. Then, in a state in which an internal space of the cylinder is communicated with a pattern forming space of a mold, the piston disposed in the cylinder is moved toward the foamed kneaded material side while opening a gas release hole formed piercing through the piston. Then, at a timing when the piston has reached an expected position where the piston is expected to be on contacting the foamed kneaded material supplied into the cylinder, the gas release hole is closed by an open-close plug. Then, the foamed kneaded material supplied into the cylinder is pressed toward the pattern forming space side of the mold by moving the piston toward the foamed kneaded material side.