Sintokogio, Ltd.

Kozo Sugita

Hisashi Harada

Minoru Hirata

Takashi Hanai

Toshihiko Oya

Takuya Nitta

Tadashi Nishida

This invention relates to a device of electrodes for measuring water content in foundry sand, an apparatus for measuring water content in foundry sand, and a method and an apparatus for supplying water to a sand mixer. When the prior art device for measuring water content in the foundry sand is disposed in it, the size or shape of the device of the electrodes is limited. To solve this problem, the device of the electrodes for measuring water content in the foundry sand by supplying an electric current to it is comprised of a plurality of conductive elementsconcentrically disposed with certain intervals between them in a longitudinal direction, wherein the elements form an annular shape, a retaining elementto retain the plurality of the conductive elements, wherein the retaining elementhas an electrical insulating property and a cylindrical shape having the same diameter as the conductive elements, and the two conductive wiresto connect alternate respective elements of the plurality of conductive elementsso that the conductive elementsform two poles, wherein the two conductive wirespass through the cavity in the retaining element

Device of electrodes for measuring water content in foundry sand, an apparatus for measuring water content in foundry sand, and a method and an apparatus for supplying water to a sand mixer

A sand-introducing device that uses air for introducing molding sand in a molding space or spaces is provided. The device is provided with air-permeable partitioning plates that define a double-walled structure together with the wall of the body of the device. The air-permeable partitioning plates are easily produced, they can easily inject pressurized air of a desired pressure, and they will not need regular maintenance. The body of the device, which acts as a pressure tank, defines a double-walled structure together with the air-permeable partitioning plates (), thereby defining chambers (). In the sand-introducing device that uses air, while molding sand is fluidized by pressurized air injected from the air-permeable partitioning plates, it is introduced in a molding space. Each air-permeable partitioning plate is made of a porous resin or metal.

Sand-introducing device using air, and method and apparatus for producing mold

Sand-introducing device using air, and method and apparatus for producing a mold

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Toyokawa, Japan

Kozo Sugita