Abstract:
A wire processing apparatus includes a microwave generator, a microwave transmitter, a waveguide coaxial converter and a wire insertion pipe, and the wire insertion pipe is disposed in the wireguide coaxial converter. In wire recycling process, after a tip end of a coated wire is inserted into the wire insertion pipe, microwave is launched into the inside of the waveguide coaxial converter. The tip end of the coated wire is separated into a decomposed coating insulator and a molten electric conductor by microwave. In wire cross-linking process, after microwave is launched into the inside of the waveguide coaxial converter, the coated wire is inserted into the wire insertion pipe. The coated wire is cross-linked by high frequency heat and a coating insulator is adhered well to an electric conductor by heat shrinking.
Abstract:
The present invention overcomes many of the problems associated with electromagnetic exposure of planar materials. A diagonal slot compensates for the effects of signal attenuation along the propagation path. Adjustably variable path lengths allow peaks and valleys of the electromagnetic field in one exposure segment to compensate for peaks and valleys in another exposure segment. Dielectric slabs may be used to extend the peak field region between top and bottom conducting surfaces to allow for more uniform exposure of planar materials that have a significant thickness. Specialized choke flanges prevent the escape of electromagnetic energy. One or more rollers between exposure segments may be enclosed by an outer surface to prevent the escape of electromagnetic energy.
Abstract:
A continuous process for the fabrication of metal clad, laminated core structures, such as circuit board cores, wherein the copper layers on the laminate are used to form a waveguide which propagates microwave or RF radiation in TEM mode down the length of the structure for heating the core layers while the necessary pressure is applied. The TEM mode offers substantial advantages in the uniformity and control of processing in this environment. In particular, the system may be made tunable using the positioning or two pinch points, produced by rollers applying pressure to consolidate the layered material, which points create end chokes defining a heating and pressure region wherein the radiation is reflected. Alternatively, the metal layers may also be used as capacitor-like plates for applying RF energy across the layered material.
Abstract:
A continuous process for the fabrication of metal clad, laminated core structures, such as circuit board cores, wherein the copper layers on the laminate are used to form a waveguide which propagates microwave or RF radiation in TEM mode down the length of the structure for heating the core layers while the necessary pressure is applied. The TEM mode offers substantial advantages in the uniformity and control of processing in this environment. In particular, the system may be made tunable using the positioning or two pinch points, produced by rollers applying pressure to consolidate the layered material, which points create end chokes defining a heating and pressure region wherein the radiation is reflected. Alternatively, the metal layers may also be used as capacitor-like plates for applying RF energy across the layered material.
Abstract:
Apparatus for heating a silica optical fiber in a fiber-drawing installation. The apparatus is disposed at the outlet of a fiber-drawing oven to raise the optical fiber to a temperature greater than 1000.degree. C. The apparatus is constituted by a microwave generator coupled to a resonant cavity formed by a helically-wound metal wire helix fixed at opposite ends to two short circuit metal plates respectively, with the optical fiber running substantially along the axis of the helix and the helix concentric about the running fiber.
Abstract:
Microwave air float bar for use in floating and drying a continuous planar web of a material in a dryer. Radiated microwave radio frequency energy from a microwave in an air bar accelerates drying, or evaporation of solvents, or curing of planar web material passing in proximity to the microwave air float bar either by microwave radio frequeny energy, or in combination with Coanda air flow.
Abstract:
A microwave heating device for using microwave energy to heat a high polymer material or the like being conveyed under pressure comprises a hollow, cylindrical microwave waveguide closed at one end and having a metallic shell capable of withstanding high internal pressures, a pressure partition made from a dielectric material provided within said waveguide near an open end thereof so as to define a sealed space between itself and the closed end of said waveguide and to define a path for introduction of microwaves between itself and the open end of said waveguide, a solid or liquid dielectric packing material filling said sealed space and thereby forming a packed dielectric region, said packing material having a lower specific inductive capacity than that of the material to be heated, a passage for pressurized conveyance of the material to be heated, said passage running transversely through said waveguide at said packed dielectric region thereof, and a microwave generator for transmitting microwaves into said waveguide, the pressure within said passage is supported by said waveguide, said pressure partition and the closed end of said waveguide.
Abstract:
A microwave arrangement for heating material in a continuous process. The microwave arrangement 1 comprises a circular-cylindrical resonator 2 in which a field configuration is generated so that areas having a maximum field energy are created in the resonator 2. By passing low-dielectric loss materials 14 a plurality of times along a helical path through these areas, the efficiency is significantly improved. An embodiment which is particularly suitable for drying wire or tape-form materials 14 comprises a rotatable circular-cylindrical reel 8 via which the materials 14 are conveyed to the areas.
Abstract:
This invention discloses a continuous process for the production of polymer-polyoxymethylene (POM) having small linear expansion coefficients and high tensile modulus, the process for producing an ultrahigh modulus POM comprising the step of drawing a crystalline polymer continuously under dielectric heating while maintaining the ambient temperature at an elevated temperature by external heating, said ambient temperature being controlled to change from a lower temperature to a higher temperature along the drawing direction of said crystalline polymer with a pre-set temperature gradient.
Abstract:
The invention relates to a surface treatment for stoichiometric silicon carbide. A carbon-rich silicon carbide layer is applied over the silicon carbide. In the case of the silicon carbide surface, the ratio of silicon to carbon in the carbon-rich layer varies from one at the silicon carbide interface to near zero in the interior of the carbon-rich layer to greater than zero and preferably 0.3 to 0.5 on the surface of the carbon-rich layer remote from the interface. A preferred method of making the silicon carbide layer is also presented.