Abstract: Disclosed is a process and apparatus for multi-strand continuous casting wherein a plurality of strands may be spaced apart from each other by a distance only dependent upon the dimensions of a copper plate and water-cooling jacket of a mold because a multi-strand mold oscillation mechanism may be installed independently of the spacing between the adjacent strands and the amplitude of oscillation of each mold may be suitably adjusted depending upon the casting conditions but independently of each other. Cast products emerging from the molds are withdrawn through a multi-strand roll apron or bending unit, a multi-strand casting bow, a multi-strand straightener and a multi-strand table by a multi-strand-pinch-roll stand consisting of a plurality of coaxial multi-pinch-roller assemblies, the individual pinch rollers in each assembly being driven independently of each other.
Abstract: A method and machine for adhering a thermosetting strip to the spine and adjacent outside edges of a book formed by the papers and covers comprising a memorial, report etc., whereby the book, clamped in a case is moved rectilinearly to stations for roughing-up its spine, applying a thermosetting band web from a roll carried by a trolley, cutting the web transversely to form the strip, heating and applying pressure to the strip, and cooling it, the trolley with its roll of band being moved in coaction with the case and being subsequently returned to its original position by the case, which then continues to its original position, the necessary movements being motorized and preprogrammed.
Abstract: An apparatus is disclosed for making foam plastic insulating panels. The apparatus has a lower conveyor band forming a support surface and a first continuous form belt on the support surface and an upper conveyor band forming a limiting surface and a second continuous form belt on the limiting surface. The conveyor bands are supported for rotation between conventional tires, the inflation of at least one of the tires controls the pressure on the form belts adjacent their initial point of contact. Resilient metal clips are provided which lock the support and limiting surfaces together during curing of the foam plastic panel.
Abstract: Molten sulfur is fed at a controlled flow rate into a spinning vessel located in an enclosure. A ring of sulfur ejecting nozzles each have an inlet communicating with a conduit that extends tangentially from the periphery of the vessel interior and an outlet communicating with the air in the enclosure. As the sulfur is ejected from the nozzles, it is atomized. The atomized sulfur is further cooled to form solid particles before appreciable agglomeration takes place by fans on both sides of the ring of nozzles into which cooling water is ejected and evaporated. Each nozzle has a deflector at its outlet, and adjustable protrusions that interrupt the flow at the nozzle outlet to control the particle size. The solid particles are removed from the enclosure, thoroughly mixed with a substantial quantity of air, and then separated from the air by a cyclone centrifugal separator.
Abstract: An improved pelletizing press for producing pressed feed products and the like, of the type comprising a radially perforated die with at least two pressing rollers oppositely mounted therein and driven by frictional engagement with the rotary die. The improvement provided by the invention consists of a large principal pressing roller providing increased pellet production with equal specific energy comsumption of the pelletizing press and at least one oppositely mounted auxiliary pressing roller which has a considerably smaller diameter than said principal pressing roller, and is mounted in opposed relation thereto so as to function as a compensating roller while providing a minor pressing action.
Abstract: The aerodynamic shield members of the apparatus for electrostatically charging fibrous material disclosed in U.S. Pat. No. 3,860,369 are coated with a material having a resistance of between 5.times. 10.sup.12 and 10.sup.14 ohms/sq to reduce arcing at higher charge levels.
Abstract: A continuous, moving length of substantially rigid thermoplastic synthetic resin material is marked with a hot die at spaced intervals along its length. The hot die is mounted for movement parallel to the direction of movement of the sheet from the sheet forming apparatus, and is actuated in coordination with a sheet cutter which cuts the continuous length into individual sheets so that a die mark is provided at the desired position on each sheet cut from the continuous length.
Abstract: A process for continuous casting of hollow ingots wherein the rate of heat removal from the surface of an ingot within a mold is changed gradually over the mold height from a given maximum value in the ingot skin formation zone to a given minimum value as the ingot emerges from the mold. The speed of the continuous ingot withdrawal from the mold is increased gradually during each withdrawing cycle from zero to the maximum value for apredetermined length of time. An apparatus in accordance which comprises a water-cooled mold which is made in the form of an inverted truncated cone with the diameter of any of its bases being substantially less than its height. A part of the upper portion of the mold being cylinder-shaped and formed with a plurality of slots. The diameter of projections formed by the slots is slightly less than that of the top base of the frustoconical section, with the walls of the slots passing smoothly into projections.
July 5, 1977
Date of Patent:
March 27, 1979
Gennady A. Anisovich, Vadim I. Tutov, Vladimir F. Bevza, Evgeny I. Marukovich, Zoya D. Pavlenko, Vasily S. Mazko, Gennady E. Ivanov
Abstract: The present method and apparatus for die casting of metals such as aluminum, is especially suitable for casting under vacuum. The casting is performed under such operating conditions that a contact between the molten metal being cast and the free atmosphere is avoided all the way from the melt to the casting proper. For this purpose, the present casting apparatus includes a closeable and evacuable transport container connected to the casting apparatus proper by a coupling which is also evacuable. The transport container is placed on a filling chamber and the evacuating apparatus is arranged to simultaneously evacuate the filling chamber, the transport container and the coupling between the transport container and the filling chamber proper. The evacuation takes place in a direction opposite to the flow direction of the metal being cast. If desired, further evacuating means may be provided for evacuation of the filling chamber and the die in the direction of the metal flow.
Abstract: Washing and disintegrating means serve to wash and disintegrate the waste material and to continuously deliver the resulting washed and disintegrated material. A first conveyor serves to receive said washed and disintegrated material from said washing and disintegrating means and to remove water from said washing and disintegrating means and to remove water from said material. A dirt separator serves to receive said washed and disintegrated material from said first conveyor and to remove dirt from said washed and disintegrated material and to deliver the resulting cleaned material. A second conveyor serves to receive said cleaned material from said dirt separator and to remove water from said cleaned material. A water collector serves to receive water removed by said second conveyor. A return conduit serves to deliver water from said water collector to said dirt separator.
Abstract: An apparatus and method for producing sheets of bitumen in which a layer of liquid bitumen is deposited on a steel belt conveyor and is solidified to form a continuous web. The web is stripped from the conveyor and passes downwardly by the action of gravity to a cutting assembly which cuts the web into lengths to form sheets. The sheets are then stacked upon a discharge conveyor and are adapted for packaging.
Abstract: Apparatus and a method for forming a uniform film of plastic material, having good optical characteristics, on a substrate are disclosed. The plastic material is supplied to and maintained under pressure in a distribution channel and is fed from the distribution channel through a narrow slot to the substrate. A forming member subsequently forms the plastic material into a uniform film on the substrate. The level of the plastic material in front of the forming member is limited to a range of values based upon the thickness of the film being formed.
Abstract: There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a tubularly-formed sheet of thermoplastic material in a first station and a plurality of second stations wherein the first and second stations are provided with sets of rolls having generally sinosoidally-shaped grooves perpendicular and parallel, respectively, to the axis of each set of rolls to produce bags of improved strip tensile breaking length.
Abstract: Relates to plastic material molding machines and to a unitary assembly of parts installable between the hopper and the plastic pellet material inlet opening of the molding machine for providing bodily translatable movement of the hopper to one side of the machine where the remaining contents of the hopper may be discharged into a drainage collector for possible re-use at a later time. The translatable movement of the hopper is usually performed when the hopper content is to be changed and is carried out by moving or sliding the hopper while in upright position along a track extending laterally of the machine. The track occupies the upper position of a gas-tight conduit, preferably rectangular in cross section, which serves to deliver a gaseous medium to the contents of the hopper, such as hot dry air for the purpose of removing moisture from the plastic pellets in the hopper.
Abstract: The process and apparatus herein is used for achieving multilevel mechanical embossing of a fused or cured wear layer in register with a print on an expanded foam thereunder. The expansion of the decorative foam and fusion of the wear layer are carried out and then the back of the foam is cooled by wetting and liquid evaporation. The wear layer is maintained at a high temperature for embossing and is embossed with registry between the embossed pattern and the printed pattern on the foam. Just prior to embossing, the decorative foam-wear layer web is wrapped around the backup roll of the embossing apparatus, and after embossing, is wrapped partially around the embossing roll of the embossing apparatus.
August 10, 1977
Date of Patent:
March 6, 1979
Armstrong Cork Company
Walter J. Lewicki, Jr., William M. McQuate, Richard M. Ringer
Abstract: A hinged carton integrally molded of polystyrene foam and adapted to be locked shut by a flap extending upwardly from the bottom part of the carton inside a side wall of the carton cover and carrying one or more prongs so that the latter will be biased outwardly to snap into a corresponding number of holes provided in said cover side wall, the ruggedness of said carton being materially enhanced over similar cartons of the prior art by the local beefing up of said cover side wall in the immediate areas bordering said holes incidental to the functioning of a novel method of and apparatus for manufacturing said carton. Said apparatus is embodied optionally in a forming tool or in a form-and-trim tool and embraces relatively vertically reciprocable carton shaping matched-molds operating on a heated thermo-plastic web of polystyrene foam to produce one or more entire cartons with each reciprocation.
Abstract: A no bake blower for making sand cores.A blow head has a blow plate detachably mounted at the lower end of the blow head and adapted to be moved vertically away from the blow head. The blow head is movable horizontally with respect to the blow plate and in so doing scrapes residual sand off the blow plate.A blow plate cleaning mechanism is carried by the blow head into vertical alignment with the blow plate after the blow head has been horizontally moved. The cleaning mechanism has vertical rods which pass through the blow holes in the blow plate to remove residual sand from them.
Abstract: This invention provides a simple and advantageous method for producing plastic moldings with good surface gloss, very excellent transparency and high stiffness from crystalline polypropylene sheets manufactured by a generally employed industrial method without adversely affecting mechanical strength, shape retention at high temperatures and other properties according to a thermoforming process. This invention, more specifically, concerns a method for producing transparent polypropylene molded articles, characterized by heating a polypropylene sheet at a temperature higher than the melting point thereof, stretching it by more than 5%, rapidly cooling it to a temperature of not more than 120.degree. C., and then subjecting the thus treated sheet to thermoforming at a temperature below the melting point of the sheet.
Abstract: Apparatus for continuous, high speed production of foundry mould parts by pressing them from a continuous bed of foundry sand mix which is based on a curable binder, pressing of the part being carried out at a time when the mix has adequate plastic flowability for pressure moulding and adequate potential curability to assure a strong, rigid cured product. Advantageous embodiments include curing means operating in conjunction with the pressing means.
February 22, 1977
Date of Patent:
February 27, 1979
J. R. Short Milling Company
Kent Woonton, Jeffrey R. Short, III, Kenneth N. Roach