Hitachi, Ltd.

Hitachi Plant Engineering Construction Co., Ltd.

Keiichi Koike

Michio Yanadori

Seigo Miyamoto

Tatsuo Natori

Hideaki Kamohara

Takashi Shimaguchi

Toshimi Sasaki

Akihide Watanabe

In a forming method and a mold wherein a slip is cast into the mold and wherein the mold is removed after hardening of the slip, the mold is patterned by the use of a water-soluble binder. The mold absorbs a water content in the slip to soften and to become easy of removal, while the slip has the water content absorbed to harden promptly. Therefore, the forming method and the mold are especially suited to produce a cast article of complicated shape.

Slip casting forming method and mold

A heat storage material is produced by adding water and slight amounts of substances for agglomerating residuals to industrial grade calcium chloride.

Heat storage material and process for producing the same

A heat-storing vessel filled with a heat-storing material of latent heat type is provided with a fluid flow passage in thermal contact with the heat-storing material for passing a fluid for storing and releasing heat. By passing a hot fluid through the fluid flow passage, the heat-storing material in the heat-storing vessel is melted to store heat. By passing a cold fluid through the fluid flow passage, the heat-storing material in the heat-storing vessel is solidified to release heat. The heat-storing material contains a gelling agent to suppress a phase separation phenomenon. A low temperature part is provided at a part of the heat-storing vessel and the heat-storing material containing the gelling agent is retained in a solid state at the low temperature part to prevent supercooling of the heat-storing material.

Heat-storing apparatus

A heat storage material to be used for air cooling systems is provided. This heat storage material comprises acetic acid or a mixture of acetic acid and one or more acetates and is further added with at least one anhydrous halide as nucleating agent to prevent supercooling.

Heat storage material

When strontium oxide is applied as a nucleating agent to calcium chloride-hexahydrate as a heat storage material, a supercooling phenomenon of the resulting heat storage material can be suppressed to be slight.

Supercooling of sodium thiosulfate pentahydrate is prevented by adding thereto naphtharene or naphthol and/or at least one of calcium sulfate, potassium chloride, sodium chloride, potassium bromide, sodium bromide, potassium iodide, and sodium iodide, or a pyridine.

Heat-storing composition

A heat-storing composition comprising acetic acid and at least one of sodium acetate, ammonium acetate, potassium acetate and calcium acetate works at a desired temperature in a temperature range of 5.degree.-20.degree. C. and is chemically stable with a high heat-storing capacity.

A mold produced by adding to a molding material consisting mainly of alumina a binder prepared by adding an inorganic water-soluble substance to an alcohol or a mixture of an alcohol and water, kneading and molding the mixture, and then drying the molded mixture has water-solubility and self-hardening property. Further, by suitable selection and combination of the inorganic water-soluble substance and the solvent in the binder, the drying step becomes unnecessary or the molding material shows fluidity at room temperature and a self-hardening water-soluble mold requiring no ramming is obtained.

Self-hardening water-soluble mold and process for producing the same

A heat insulating coating material is provided by admixing an alkali metal silicate binder and water with aggregates comprising silica-containing inorganic refractory fibers, silica-containing porous refractory materials and silica-containing powdery refractory materials. The alkali metal silicate binder can be replaced by a phosphate binder, depending upon the nature of an atmosphere, and finely divided metals can be incorporated into the aggregates.

Heat insulating coating material

A castable strong aluminum (Al)-zinc(Zn)-magnesium (Mg) alloy having good mechanical strength, no heat checks produced and improved castability has been provided by lowering the zinc content and increasing the magnesium content than those in prior aluminum-zinc-magnesium alloys.

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Matsudo, Japan

Keiichi Koike