Abstract: A method of manufacturing simulated animal or fish skin includes pouring a silicone compound over a sample of the skin to be simulated as, for example, dried fish skin. After the silicone compound jells, it is removed from the sample as a layer and forms a mold of the skin to be simulated. The mold is then cleaned and covered with a fiberglass cloth. A flex resin compound is poured onto the fiberglass cloth to fill the mold. After waiting a predetermined period of time, the fiberglass cloth is removed leaving behind the simulated skin which may then be painted to achieve realism. The painted simulated skin may then have a backing material such as cloth or vinyl applied thereto and the composite material cut to a desired shape.

Abstract: A process is described for the preparation of perlite ore fines for expansion. The ore fines are treated with an agglomerating agent which has a viscous liquid phase at a temperature above ambient temperature but below the critical dehydration temperature of the perlite ore fines. Suitable agglomerating agents mentioned are the boron acids, particularly orthoboric acid and metaboric acid. The perlite ore fines and agglomerating agent are mixed, preferably by dry mixing, and then heated to the temperature of the viscous liquid phase and held at that temperature for a short period while the liquid coats at least a portion of the perlite ore fines and effects agglomeration. Thereafter, the agglomerated perlite ore fines can be expanded in a conventional perlite ore expander. The resulting expanded materials have properties essentially identical to standard expanded perlite ore and are useful for such purposes as insulating fillers and light weight aggregates.

Abstract: Thin, flexible capacitive electronic discs are formed by directly compression molding a powder composition having a particle size such that no particles are larger than about 400 micrometers and a substantial portion is between about 25 and 300 micrometers and comprising a thermoplastic resin, conductive carbon black particles and suitable additives. An information track is embossed into at least one surface of the disc, preferably simultaneously with the molding step. The discs are from about 0.15 to 0.6 mm thick. Preferably, the discs are about 0.2 mm thick, which is about one-tenth of the thickness of present commercial discs.

Abstract: Coated sheet molding compound (SMC) parts are produced by transferring mold devices between a main press and at least one auxiliary press and by completing the compressing and curing of the coated SMC parts during the transfer of the molds. In the main press the SMC sheet is compressed and cured to be formed into a desired shape, and the formed SMC part is coated in the mold, and in the auxiliary presses the other operation such as charging the SMC sheet, closing and opening the mold, removing the part, and the like are performed. Between the adjacent main press and auxiliary presses are means for transferring the molds between the respective presses. Levelling devices are provided associated with the molds for supporting the upper mold parallel to the lower mold, and during the transfer the coated SMC part is further compressed and cured in the mold by suitably controlling the levelling devices. This method can be sufficiently applied to mass production systems such as automobiles or the like.

Abstract: Capacitive electronic discs having thin conductive layers are prepared by coating a core disc with a finely particulate conductive composition comprising a thermoplastic resin, conductive carbon black particles and suitable additives. The powder coating is compressed under heat and pressure to fuse the powder to the surface of the core disc. An information pattern is embossed therein, preferably simultaneously.

Abstract: There is provided an FRP molded article having the properties of uniformly reflecting and shielding electromagnetic waves in the range of VHF to EHF. The molded article comprises a compression-molded laminated structure composed of an electroconductive nonwoven fabric-resin composite surface layer, a woven fabric-resin composite intermediate layer, and a fiber material reinforced resin substrate layer. The molded article can be produced by placing, on a mold, an electroconductive nonwoven fabric or a prepreg thereof, a woven fabric or a prepreg thereof, and then a mixture of a reinforcing fiber material and a liquid crosslink-curable resin composition thereon, and subjecting the laminated materials to compression molding. The molded articles can be advantageously used, for example, as reflecting dish antennas as well as shielding sheets or boards for electromagnetic waves.

Abstract: Apparatus and method for producing semiconductor ribbon directly from the molten state by contact with a moving chill surface wherein water vapor is introduced to improve ribbon top surface smoothness.

Abstract: A mold apparatus which in addition to the other mold elements, has shuttle plate means adjacent to the nozzle means out of which the molding composition comes out of into the mold cavity, which shuttle plate means forms part of the mold cavity. The shuttle plate means are adapted to automatically take a finished molded part from the mold and remove it out of the mold apparatus. At the same time while the molded part is being taken out of one portion of the shuttle plate means, the other part of the shuttle plate means is being utilized to form a molded part.

Abstract: A novel method and device for precision injection molding is disclosed providing controlled cooling of a portion of the mold cavity surface during the molding cycle, or several such portions independently, and also, in the preferred embodiment controlled heating of a portion of the mold cavity surface during the molding cycle or several such portions independently, whereby high quality, high precision parts having close dimensional tolerances may be produced. Another aspect of the invention, a volume-controlled variable conductance heat pipe is disclosed, which novel heat pipe comprises housing means forming a sealed chamber, fluid, such as water or ammonia, within the chamber, wicking means and control means for controlling the thermal conductance of the heat pipe comprising means for controlling the volume of fluid in the liquid phase in the chamber.

Abstract: A method is disclosed for preparing orifice plates for ink jet printing apparatus from a set of orificed cylindrical jewels having substantially identical fluid flow rates therethrough. Several pairs of closely spaced thin wires are mounted transversely across a mold cavity. Each pair of wires is tensioned to support a cylindrical jewel without deflection. Two backing plates then are placed on the mold to position the jewels in precise alignment. The mold then is filled with a liquid resin to cover the jewels. The resin then is cured to a solid state. The cured structure is removed from the mold and the protruding wires are trimmed to form the finished orifice plate.

Abstract: An improved rotary injection molding press for plastic parts of the type having a movable platform which indexes one or more manually opened and closed mold blocks to and from different stations on the press. Should an open mold block index from a preparation station to the index station where an injector mechanism injects fluid plastic into closed mold blocks, an actuator detects the open mold block to activate switch means to stop the press. Should a closed mold block index from a cooling station when the injected plastic cools in the mold block to an eject station which ejects the completed part from open mold blocks, a pin disposed in the mold block activates a switch to stop the press. Additionally a protective shroud is provided surrounding the injector mechanism to protect the press operator. Removal of the shroud activates a switch to stop the press.

Abstract: A mold apparatus for liquid injection molding machine which mold is dripless comprising a frame, four support posts mounted on the frame; a conduit for a liquid molding composition slightly mounted on the forward end of the frame having a front end and a rear end; a first plate means having passage means therein for the passage of the liquid molding composition and fixedly mounted on the forward end of said conduit and adapted to slide within support means and within said mold frame means located adjacent to the forward end of said frame, nozzle means at the end of said passage means of said first plate means at the rear end of said mold frame means and away from said conduit means and pin means slidably mounted in said mold frame means adapted to open and close said nozzle means and mold cavity means slidably mounted on said support means adapted to move toward and away from said nozzle means.

Abstract: Manufacture of shaped bodies from fiber-reinforced plastics material, in which fibrous reinforcing material is positioned in a recess in a mould die (9, 10, 11) consisting of one or more parts. The die recess is then closed by means of a cover (12) which can move relative to the die, in order to form a mould cavity. A solidifiable, liquid plastics composition is introduced into the mould cavity and there subjected to a pressure of such magnitude as to substantially completely fill the cavity, the cavity then being held closed until the plastics composition has at least partially solidified. In order to reinforcing material to be used and in order to raise the mould capacity, the reinforcing material (4) is placed in the die recess while lying in prepared orientation in a thin-walled lining (1, 2) intended to be received in the die recess, the lining being removed, subsequent to a moulding operation, and replaced with a similar lining having fresh reinforcing material thereon.

Abstract: In a method for molding formed parts in automatic multiposition presses, using powdered materials having a flowability characterized by a flow time exceeding 60 seconds per 100 g of powder flowing from a 60.degree. standard funnel with a nozzle aperture of 4 mm and a nozzle length of 4 mm, the powdered material having in the mold a filling height to diameter ratio larger than two, the powder is conveyed into the mold by means of filling devices located at a plurality of separate charging stations, pressed at a separate pressing station and ejected at yet another separate station. The filling heights in each mold is subdivided into at least two individual filling heights so that the filling of the mold to these individual filling heights can be carried out at different charging stations.

Abstract: An injection molding process for fabricating a sliding vane pump with a close tolerance between the rotor assembly and the pump chamber using two semi-circular inserts to hold the rotor assembly while the molten plastic is injected to form the housing. The inserts function to stop the molten plastic from entering the rotor assembly during injection and upon removal to form the inlet and outlet ports of the pump.

Abstract: A mold for molding elongated workpieces is comprised of three vertically oriented quadrants and a fourth quadrant pivotally mounted relative to the three quadrants between a mold open position and a generally vertically oriented mold closed position. A workpiece core is loaded into the mold by positioning end plates on the workpiece core and locating the combination on the fourth quadrant by positioning of the end plates on locating pins projecting from a frame member or tilt beam associated with the fourth quadrant. Slide assemblies are then moved into core-engaging positions on each end of the workpiece core to accurately locate the workpiece core relative to the fourth quadrant. The fourth quadrant with the workpiece core locked thereon is then moved into a mold closed position for molding.

Abstract: An improved device for making plastic articles from resin and an improved runner block assembly for a mold for making plastic articles from resin have been made by providing a runner block assembly having at least one channel wherein the channel has a cross-section with two opposite sides having a length substantially less than the two other sides thereby forming a thin, flat channel sufficient to provide shear resistance resulting from forcing resin through the channel; means for connecting the channel to a plurality of mold cavities, and means for supplying resin to the channel.

Abstract: An improved method of transferring thermoplastic material from an injection unit to a sandwich mold when a transfer of molding material along the central axis of the clamping platens is not suitable. The method utilizes one or more snorkels which have a central axis which is displaced from the central axis of the clamping platens. The method may be adapted to various sandwich molding cycles, and does not have problems with material drooling into the parting surfaces. The method may easily be used, with minor adaptations, in standard horizontally operating injection molding machines.

Abstract: A method for producing multi-colored articles using injection molding results in an elongated article having a pattern of adjacent areas formed of discrete, separately molded materials, of different colors. Articles produced by this method are sturdy, safe and visually attractive, making them especially suitable for use as handles for personal grooming brushes and similar products.

Abstract: Manufacture of silicon granules from molten silicon by pouring molten silicon into a liquid body to solidify and granulate the silicon. The liquid body is substantially free of impurities which will contaminate the silicon.