Abstract:
A method for producing a polymer electrolyte membrane is disclosed. A liquid medium is introduced into a cylinder having an inner surface having a cylindrical configuration. The liquid medium has at least one percent by weight of a polymer electrolyte and a solvent having a boiling point or an azeotropic point ranging from 60 to 220 DEG C. Subsequently, the cylinder is rotated for evaporating the solvent by means of a centrifugal force created by such rotation so as to form a polymer electrolyte membrane having a cylindrical configuration with a substantially uniform thickness on the inner surface of the cylinder. Onto the inner surface of the polymer electrolyte membrane, a catalytic layer containing a catalytic particle may be formed.
Abstract:
A rotational molding apparatus that utilizes stationary temperature sensors (56, 58, 74, 76), e.g., infra-red thermometry (IRT) sensors, for continuously monitoring the temperature of the molds (52) during rotation.
Abstract:
A system for continuously monitoring the temperature of a rotational mold (M) mounted to a rotational molding apparatus (10), the apparatus including a base (50), a drive device (11) supported on the base for 360 degree rotation thereon, a mold (M) and a rotatable shaft (13s) extending from the drive device (11) for supporting the mold, the mold being rotatable through a 360 degree axis of rotation with respect to the shaft, and the shaft being rotatable through a 360 degree axis of rotation with respect to the drive device. The system comprises a heat sensor (14) mounted in the mold; a series of first (16), second (26), and third (36) slip ring assemblies, each including a pair of slip rings and a contact device (21, 29, 39), the assemblies maintaining continuous electrical contact during rotation of the mold, the shaft and the drive device; and a control device (40) receiving electrical signals from the heat sensor through the first, second and third slip ring assemblies for continuously monitoring the temperature of the rotational mold. A method for controlling a rotational molding apparatus is also disclosed.