Abstract: The present inventions provide a method for forming molds and a core which generates no gases with bad effects on the human bodies while the binders are heated. In particular, the present inventions provide a method for forming molds and a core comprising an aggregate material mixture consisting of granular aggregate materials, wherein the aqueous binders and water are foamed with stirring, filled into a space for forming molds, and caked with an evaporating water component. In an embodiment, molds can be further cured by adding cross linking agents before and after they are taken out from the space for forming. Further, an aggregate material mixture for forming molds used for the method for forming molds of the present inventions is provided.

Abstract: There are provided a dry aggregate mixture wherein the binder, even when heated, does not evolve unpleasant odor or gas hazardous to human health; a method of foundry molding wherein a space for foundry molding, up to minute portion thereof, can satisfactorily be filled with an aggregate mixture composed of a binder and granular aggregate; and a method of foundry molding wherein the mold used in molding of an aggregate mixture composed of a binder and granular aggregate can retain satisfactory properties even in high humidity. In the method of foundry molding, a mold is formed by the use of a dry mixture obtained by providing an aggregate mixture composed of granular aggregate, a water soluble binder and water and evaporating the water contained in the aggregate mixture through heating, pressure reduction or aeration while mixing so as to effect separation into single granules, or with the addition of a lubricant and a crosslinking agent thereto.

Abstract: An information processing apparatus includes a management master extraction unit which extracts management master information from a management target file; a storage device which stores a file management database in which the management master information on each management target file is registered; a storage event output unit which outputs a signal indicating a storage event of the file; a deletion target extraction unit which extracts information on a management target file corresponding to a deletion request from the file management database; a file deletion unit which deletes the management target file from the storage device based on the information; a management master information update unit which updates validity information on the deleted file in the management master information in the file management database into invalid; and a deletion information output unit which outputs a signal indicating the deletion of the management target file.

Abstract: The present invention provides means for selecting a direct drive type electrically driven expansion valve (Z). The present invention includes a compressor (121), an external heat exchanger (123), a direct drive type electrically driven expansion valve (Z), and an internal heat exchanger (131). The rating torque equivalent friction factor E of the direct drive type electrically driven expansion valve (Z) is set to 0.31 or more.

Abstract: The method disclosed is for thermoplastic welding, by fusion bonding, an integral assembly of at least two composite thermoplastic parts (2, 4). One part (2) is integrally molded with a plurality of ribs (7) to be used and bonded to their mates (8) of the counterpart (4). A heat generator assembly (3) applies heat energy to the ribs (7, 8) of the parts so as to heat and thus fuse them. Immediately after the application of the heat energy, pressure is applied to the heated parts (2, 4) to push them together. The heated ribs (7) of the part (2) are consequently aligned and bonding contacted with the heated ribs (8) of the counterpart (4). This application of pressure is maintained during a predetermined period to facilitate fusion bonding of the ribs (7, 8). Finally, an integral assembly in which the part (2) is rigidly welded to the counterpart (4) the ribs (7, 8) is produced.

Abstract: An air conditioner has a refrigerant circuit 1 in which a refrigerant flows through a compressor 2, a condenser 3, a supercooling heat exchanger 10, a first expansion mechanism 4 and an evaporator 5 in this order. In this refrigerant circuit 1, the refrigerant discharged from the compressor 2 is condensed in the condenser 3 and the condensed refrigerant is supercooled in the supercooling heat exchanger 10. This refrigerant is reduced in pressure in the first expansion mechanism 4, thereafter evaporated in the evaporator 5 and sucked into the compressor. Use of a nonazeotrope refrigerant as the above refrigerant can increase the refrigerating capacity improving effect due to supercooling as compared with the case where a single refrigerant is used.

Abstract: A mold is disclosed for producing a pulp molding. The mold includes a reticulate resin mold part (1) of a three-dimensional shape. The resin mold part (1) is metallized for reinforcement and mounted on a support member (3) made of a resin, metal, or aggregate. The support member has substantially the same three-dimensional shape as that of the reticulate resin mold part, and has openings (3A, 3A) to discharge water from the openings (1A, 1A) of the metallized resin mold part (2).

Abstract: The present invention provides a method of preparing a molded body good in processing properties, having fine contiguous pores throughout it. The surface texture of the body is fine. The body is excellent in thermal conductivity and heat-resistance properties, can be readily prepared, and is usable as a transferring mold.The method comprises compounding and mixing 5-20 parts by weight of a binder consisting of a modified amine and a modified M. D. I. that are both liquid with 100 parts by weight of an aggregate consisting of aluminum powders or aluminum-based alloy powders, filling the mixture in a molding flask, and compressing it under a pressure per unit area of 20-80 kg/cm.sup.2, and maintaining it under the same pressure until the binder is hardened.

Abstract: A method of preparing a durable air-permeable mold having dimensional accuracy and without cracks clue to the segregation of the ingredients of the aggregate and without a surface irregularity, which comprises compounding 100 parts by weight of an aggregate obtained by compounding metal powders with metal oxide powders in a weight ratio of 5:95 to 30:70, the metal of said metal oxide powders being the same as that of the metal powders, 80% or more of said metal powders and said metal oxide powders having grain sizes of 300 .mu.m or less, with 10 to 35 by weight of an auxiliary hardening material that is softened and melted during the sintering process, and 10 to 25 by weight of a binder that contains an evaporable component, mixing them to form a slurry mixture, pouring it in a pattern mold to obtain a mold, drying the thus-obtained mold, and sintering the dried mold in an oxidative atmosphere at a temperature of 600.degree. to 1200.degree. C.

Abstract: A method for manufacturing shaped articles of organic substance is disclosed, which comprises mixing an organic substance as raw material with a binder, filling a die with the resultant binder-containing mixture, compressing the mixture in a prescribed shape in the die, and forcing a gaseous curing agent through the compressed mixture thereby curing the binder in the mixture and consequently solidifying the compressed mass. This method enables shaped articles such as noise absorbers, heat insulation panels, and plate materials to be produced efficiently and inexpensively at low energy consumption by the use of an inexpensive die.

Abstract: Foundry sand grains coated with a binder composition which comprises 100 wt. parts of methylolmelamine or alkylated methylolmelamine and 5 to 100 wt. parts of a water-soluble organic compound having a hydroxyl group. The sand grains coated with the composition are effective in a low-temperature foundry, especially for forming a core in an aluminum-alloy foundry.

Abstract: A binder for casting sand of the present invention comprises 5-95 wt. % of cellulose acetate and 5-95 wt. % of a thermosetting resin precondensate such as an alkylated methylolmelamine, alkylated methylolurea or a mixture of them, and it is used particularly for the casting carried out at a relatively low casting temperature. Up to about 50% of cellulose acetate may be replaced with an acetate of an aliphatic polyhydric alcohol or an alkyl phthalate. In the resin-coated grains of sand of the present invention, the grains of sand are coated with a binder comprising 5-95 wt. % of cellulose acetate and 5-95 wt. % of a thermosetting resin precondensate.

Abstract: Vent gas containing disagreeable odor components consisting mainly of phenolic substances evolving from foundries using shell molding sand containing phenol resin as a binder is efficiently wet-treated by scrubbing the vent gas with an aqueous absorbent solution, to which a ferrous salt and hydrogen peroxide are added so that a ferrous ion concentration may be at least one-seventh of a hydrogen peroxide concentration, thereby making an oxidation-reduction potential of the aqueous absorbent solution have at least a value of (540 - 60 .times. PH value) mV, wherein the PH value is 5 or less.