1. A valve device for gas drainage, mounted to a metal mold for die-casting, capable of selectively communicating and blocking a gas drainage path used for draining gases from a cavity of the metal mold, the device comprising:
a main body in which an exhaust hole configuring a part of the gas drainage path is formed;
a valve element capable of opening and closing the exhaust hole;
a cylinder housing a piston coupled to the valve element; and
an electromagnetic selector valve for selectively switching a supply route of a driving fluid supplied from a fluid supply source of a die-casting machine to the cylinder either to a front chamber of the cylinder or to a rear chamber of the cylinder, the front chamber and the rear chamber being partitioned by the piston, wherein
the main body includes a front face configuring a part of a parting face and a fitting portion that tightly adheres to a wall face of a housing hole, when the valve device is fitted into the housing hole opening to the parting face of the metal mold, and
the electromagnetic selector valve is positioned on a rear side of the main body, and at the same time, positioned inwardly of a contour line of the man body formed by the fitting portion when the main body is viewed from the front face.
2. The valve device for gas drainage according to claim 1, wherein the fitting portion extends from the periphery of the front face toward the rear side.
3. The valve device for gas drainage according to claim 2, wherein the fitting portion includes a portion shorter than a length of a front-back direction of the main body.
4. The valve device for gas drainage according to claim 1, wherein the electromagnetic selector valve includes a selector valve main body mounted to the cylinder and a connecting tube for supplying driving fluid to the selector valve main body, and the connecting tube is connected to a rear face of the selector valve main body.
5. The valve device for gas drainage according to claim 1, wherein the main body is made from the same material as that of the metal mold.
6. The valve device for gas drainage according to claim 1, wherein in the main body, a cooling hole through which coolant passes is formed.
7. A metal mold for die-casting comprising a stationary mold for forming a cavity and a movable mold for forming a cavity, the stationary mold and the movable mold including parting faces facing each other, wherein
a gas drainage path for draining gases from the cavity and a housing hole opening to the parting face are formed in one of the stationary mold and the movable mold,
in order to selectively communicate and block the gas drainage path, a valve device for gas drainage according to claim 1 is fitted into the housing hole, and
an electromagnetic selector valve of the valve device for gas drainage is away from a wall face of the housing hole.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A hybrid welding device, comprising:
a fuel cell configured to consume a fuel source to generate a substantially constant power output for a welding operation;
an energy storage device configured to discharge a supply of stored energy to provide power to supplement the fuel cell power output while a welding power output level exceeds the fuel cell power output and to be charged by the fuel cell power output while the welding power output level is below the fuel cell power output; and
power conversion circuitry coupled to at least one of the fuel cell and the energy storage device and configured to receive the power from the fuel cell, to receive the power from the energy storage device, and to convert the received power to an output suitable for use in the welding operation.
2. The hybrid welding device of claim 1, wherein the welding operation is at least one of a welding process and an auxiliary process.
3. The hybrid welding device of claim 1, wherein the power conversion circuitry comprises a weld power converter configured to convert the received power to an output appropriate for use in a welding process by a welding torch.
4. The hybrid welding device of claim 1, wherein the power conversion circuitry comprises an auxiliary power converter configured to convert the received power to an output appropriate for use in an auxiliary process by an auxiliary device.
5. The hybrid welding device of claim 1, further comprising an engine and a generator driven by the engine to produce power for use in the welding operation.
6. The hybrid welding device of claim 1, wherein the power conversion circuitry is further configured to receive power from a utility power source and to convert the received power to an output suitable for use in the welding operation.
7. The hybrid welding device of claim 1, wherein the fuel cell is at least one of a hydrogen fuel cell, a reformation fuel cell, a proton exchange membrane fuel cell, a solid oxide fuel cell, a molten carbonate fuel cell, a regenerative fuel cell, an enzymatic biofuel cell, and a metal hydride fuel cell.
8. The hybrid welding device of claim 1, wherein the fuel cell is configured to maintain a constant power output and the energy storage device is configured to supplement the constant power output of the fuel cell to meet a power demand of the welding operation.