Abstract: To provide a calibration device for apparatus filling a gas such as hydrogen gas and capable of precisely measuring quantity of the gas that is filled at high pressure. A calibration device of the present invention includes: a filling vessel 2, accommodated in a measurement housing 1, to the filling vessel 2 a high pressure fuel gas such as hydrogen gas being fed from outside of the measurement housing 1; a scale 3 for measuring a weight of a fuel gas fed to the filling vessel 2; and a control device CU for eliminating an error caused by changing buoyant force from a gas in the measurement housing before and after filling the fuel gas.

Abstract: The invention relates to a device for examining a tubular channel, the device comprising a three-way valve, buoyancy means, pressure means, a vent line, at least one sensor and computation means; wherein the three-way valve controls the fluid flow between the pressure means and the buoyancy means and between the buoyancy means and the vent line; the computation means is communicatively coupled to the at least one sensor and adapted to generate a control signal based on data received from the at least one sensor; and wherein the pressure means is fluidly coupled to the buoyancy means via the three-way valve such that a fluid may flow from the pressure means to the buoyancy means or from the buoyancy means to the surroundings of the device via the vent line; and wherein the computation means is communicatively coupled to the three-way valve and controls said three-way valve via the control signal. Thereby, the invention is able to examine e.g.

Abstract: An inoculant feeding method and apparatus in which a desired amount of inoculants can be fed into molten metal poured into a mold by an automatic molten metal pouring machine, and an automatic molten metal pouring machine using the apparatus. An inoculant feeding apparatus (1) feeds inoculants into molten metal poured into a mold (2) from an automatic molten metal pouring machine (20), at a predetermined proportion corresponding to the amount of the poured molten metal which gradually varies. The apparatus (1) is provided with a hopper (8) which is attached to a truck (6) and which stores the inoculants, a screw conveyor (9) attached to a lower end of the hopper, a drive mechanism (10) which is attached to a base end of the screw conveyor and which drives the screw driver, and a controller (30) which controls the drive mechanism.

Abstract: Disclosed are an inoculant feeding method and apparatus, wherein a desired amount of inoculants can be fed into a molten metal poured into a mold by an automatic molten metal pouring machine, and an automatic molten metal pouring machine using the apparatus. An inoculant feeding apparatus (1) feeds inoculants into a molten metal poured into a mold (2) from an automatic molten metal pouring machine (20), at a predetermined proportion corresponding to the amount of the poured molten metal which gradually varies. The apparatus (1) is provided with a hopper (8) which is attached to a truck (6) and which stores the inoculants, a screw conveyor (9) attached to a lower end of the hopper, a drive mechanism (10) which is attached to a base end of the screw conveyor and which drives the screw driver, and a controller (30) which controls the drive mechanism.

Abstract: A new process and technical arrangement has been established for the production of grain free metal products, which can be extruded directly from the melt, by inserting a seed crystal from a seeding chamber into the opening of the extrusion jet of the melting vessel. The seed crystal will break by contact the surface tension of the liquid metal in the extrusion jet channel, which is slightly undercooled. Upon establishing contact, the temperature at the meeting point of the seed crystal and the liquid metal will be raised by RF-heating to permit the extrusion of the seed crystal backwards, ensuring that metal and seed crystal maintain contact and crystal growth will continue. It has been discovered, that single crystals with the orientation of the seed crystal will continue to grow and to establish high hardness. Speed of extrusion is exceeded to reach only grain free structure in the grown metal.

Abstract: A feeding sensor for die caster comprises a storage tank storing molten metal, a positioning member atop the storage tank, a feeding pipe connected to the positioning member and having one end passing through an opening of the storage tank and placed below a surface of the molten metal. A container of fixed volume is connected to another end of the feeding pipe and has a control valve and an air pump. A columnar supporting post has one end connected to the feeding pipe and another end connected to a weight sensor.