Abstract: In an inverter device comprising a main circuit section which switches a power at high speed, having a switching element and a smoothing condenser for smoothing the power supplied to the switching element, and a logic section for controlling the main circuit section, a shielding member is disposed between the main circuit section and the logical section. The shielding member includes a combination of a heat shielding member and an electromagnetic shielding member so as to protect the logic section from heat, electromagnetic noise, and vibration generated in the main circuit section for improving reliability of the inverter device.

Abstract: An apparatus for injection molding synthetic resin materials comprises means for injecting the material to be molded, mold means having a cavity for receiving the material from said injecting means, entrance passage means connecting said injecting means with the cavity of said mold means and valve means disposed in said entrance passage means for closing it to shut off the flow of material in said entrance passage means, said valve means having a fluid passage communicating at its one end with only the cavity of said mold means when said valve means is closed, said fluid passage having the opposite end thereof adapted to connect with another source of pressurized fluid.