Use Of Fluid Pressure In Molding Patents (Class 264/DIG50)
  • Patent number: 6136259
    Abstract: A method for joining carpet and plastic. The method includes positioning the carpet between a pair of mold halves, extruding a hollow, substantially tubular plastic between the mold halves, blowing air into an open end of the tubular plastic, bringing the mold halves toward each other, and blowing air through needle holes in one of the mold halves to force the plastic against the mold and the carpet. An apparatus for practicing this method, and a product made by the method, are also included.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: October 24, 2000
    Assignee: Lear Corporation
    Inventors: John P. Puffenberger, Arthur C. Hagen
  • Patent number: 5885691
    Abstract: A process is disclosed for producing reinforced twin-sheet thermoformed articles comprising the steps of heating first and second sheets of thermoplastic material; forming the sheets in molds; heating a reinforcing insert of thermoplastic material; placing the heated insert on the first sheet in its mold at the location to be reinforced; pressing the second sheet into contact with the heated first sheet and the heated insert to form the insert between the sheets so that a fusion of the thermoplastic sheets and the insert takes place to produce a reinforced section of the article having a desired shape and thickness. Alternative processes are disclosed wherein a heated quantity of thermoplastic liquid material is extruded or injected between the first and second sheets within the first and second molds either by inserting the liquid material before the molds are closed or by injecting it through one of the molds.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: March 23, 1999
    Assignee: TriEnda Corporation
    Inventors: Harlon W. Breezer, William F. Price
  • Patent number: 5798070
    Abstract: A molding machine comprises a mold composed of lower and upper mold sections. A recess is defined in the lower mold section to receive a lead frame or other objects. The lead frame is sandwiched between the upper and lower mold sections. A mold cavity is defined in the lower mold section below the recess so as to receive a thermosetting resin or encapsulant. A gasket groove is defined adjacent to the mold cavity to receive a gasket. The gasket is subject to plastic deformation upon application of force. An oil chamber is communicated with the gasket groove and contains hydraulic oil. The hydraulic oil is pressurized to urge the gasket against the lead frame. As a result, the gasket is so deformed as to closely contact the surface of the lead frame and seal the mold cavity. The hydraulic oil is preferably mixed with thermoplastic resin in powder form.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: August 25, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kunito Sakai, Kazuharu Oshio, Hirozoh Kanegae
  • Patent number: 5296170
    Abstract: A method for improving the internal surface of a gas-barrier, when required heat-shrinkable, multi-layer plastics film laminate in the form of a seamless tube having the innermost layer of olefin resin, the method including applying corona discharge employing at least two pairs of electrodes to the innermost layer from the outside of the tube having a gas sealed therein and pressed to a flat state avoiding the contact of opposed surface areas of innermost olefin resin layer with each other, the two pairs of electrodes being arranged such that one electrode of each pair is in contact with the outermost layer of the tube and the other of the same pair out of contact therewith while one electrode of one pair is kept in contact with the outermost layer of the tube with which one electrode of another pair is kept out of contact on the same side of the tube, so that the wetting tension of the innermost layer surface is increased to at least 35 dyne/cm by the corona discharge treatment.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: March 22, 1994
    Assignees: Gunze Ltd., Gunze Kobunshi Corporation
    Inventors: Noritsugu Sugimoto, Nobuyuki Mori, Shoji Nakamura, Fusazo Wada
  • Patent number: 5256366
    Abstract: A fiberglass molding method characterized by the use of a male mask to which glass fiber material is affixed and then sealed against a female mold by a vacuum actuated gasket system. Resin is placed into the bottom of the female mold and is pulled by vacuum through the glass fiber material by means of vacuum ports which extend through the bottom of a spillway and open at an elevation above the bottom of the spillway. The method also allows the resulting fiberglass part to be subsequently surfaced coated using the vacuum method.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: October 26, 1993
    Inventors: Richard Wejrock, Allen T. Curry
  • Patent number: 5242629
    Abstract: In a method of manufacturing optically readable discs (1) a substrate (5) is placed on a movable substrate carrier (21) and by moving the substrate carrier it is subsequently placed in a centered position on a previously applied amount of replication material (11) on a mold (15). In this position the substrate is fixed to the mold, after which the substrate carrier releases the substrate and the replication layer in the structure zone (3) is solidified.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: September 7, 1993
    Assignee: U.S. Philips Corporation
    Inventor: Petrus H. G. M. Vromans
  • Patent number: 5238643
    Abstract: A method of vulcanizing an elastomer product such as a tire including placing the product in a mould, supplying a heating medium to the interior of the product to effect vulcanization, then supplying a pressurizing medium to the interior of the product. In this method the heating medium or the heated fluid mixture is exhausted or removed from the interior of the product at least once by opening an exhaust and simultaneously supplying a cooling pressurizing medium to cool the product to a required temperature level. The heating medium may be exhausted immediately after the completion of the heating medium supply process. The heated fluid mixture may be exhausted in and/or after the pressurizing medium supply process. Preferably the rate of exhaustion is limited by a control orifice. As a result the product is cooled without giving temperature differences in different parts of the product and avoiding unfavorable pressure drop so that efficient vulcanization with good homogeneity in the product results.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: August 24, 1993
    Assignee: Sumitomo Rubber Industries Limited
    Inventor: Michihito Kobayashi
  • Patent number: 5188787
    Abstract: This invention relates to an injection moulding process for the manufacture of multi-layered articles, especially articles having barrier properties. The process includes clamping a thermoplastic film over the cavity of a mould of an injection moulding process, the film being capable of being stretched. The film is then stretched within the mould by inserting the core of the mould, preferably using a core in which a central part enters the mould and partially stretches the film prior to the remainder of the core entering the mould. The mould is then closed, excess film is trimmed off and polymer is injected into the mould cavity. The resultant article is a multi-layered injection moulded article which, depending on the characteristics of the film and injected polymer, may have barrier properties to oxygen, liquids or the like that are superior to articles moulded from only the polymer. The process is particularly useful in the moulding of containers having a depth:width ratio of at least 0.5.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: February 23, 1993
    Assignee: Du Pont Canada Inc.
    Inventors: David C. King, Rupert M. Lillis, George White
  • Patent number: 5160678
    Abstract: A method for supporting a piece which is to undergo a treatment process including embedding the piece in a particulate support medium, enclosing the support medium in a container, and pressurizing the support medium by applying pressure to the outside of the container or by applying a vacuum to the interior of the container. Various treatment processes may be employed, such as annealing.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: November 3, 1992
    Assignee: United States Surgical Corporation
    Inventors: Roy D. Gravener, Ross R. Muth
  • Patent number: 5160677
    Abstract: A method for supporting a piece which is to undergo a treatment process including embedding the piece in a particulate support medium, enclosing the support medium in a container, and pressurizing the support medium by applying pressure to the outside of the container or by applying a vacuum to the interior of the container. Various treatment processes may be employed, such as annealing.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: November 3, 1992
    Assignee: United States Surgical Corporation
    Inventors: Roy D. Gravener, Ross R. Muth
  • Patent number: 5021203
    Abstract: A method for the regulation of the process conditions in a moulding tool which is intended for the production of products of natural or synthetic polymers. The moulding tool is made up of one or more moulding parts made of sintered metal with communicating pores obtained by pressing at a high pressure and sintering at a high temperature of a powdered material. The moulding part or parts have a moulding cavity, such that the pores are open toward the moulding cavity. The outer envelop surface of the moulding tool is tightened against leakage. The method includes filling the communicating pores with a liquid with a high vaporizing temperature and regulating the pressure on the liquid in the pores by means of a suitable pressure producer connected with the communicating pores in the moulding tool.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: June 4, 1991
    Assignee: Toolvac Engineering AB
    Inventors: Owe G. T. Larsson, Anders B. H. Aberg
  • Patent number: 4996119
    Abstract: A speaker cone plate is provided with an inorganic surfacial hard layer formed at least on a face of a metal substrate and is subjected to a reinforcing treatment by hot isostatic pressing, wherein the surfacial hard layer may be composed of a carbide, an oxide, a borie or a phosphide or may be formed by plasma thermal spraying of an inorganic substance containing silicon nitride whiskers or silicon carbide whiskers.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: February 26, 1991
    Assignee: Kabushiki Kaisha Kenwood
    Inventors: Yutaka Mae, Yoichi Yaguchi, Masakatsu Sakamoto
  • Patent number: 4917903
    Abstract: For the production of decorative seams on dashboards or the like, molded of thermoplastic material by the deep-drawing method, or the like, a soft heated embossing die having a negative decorative seam is pressed briefly, at the instant of the deformation of the dashboard or the like, against the molding tool covered with the film. Elastic embossing cushions are glued into the molding tool, thereby providing that the decorative seam will have a convex curvature.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: April 17, 1990
    Inventor: Kurt Mente
  • Patent number: 4894190
    Abstract: A continuous process method of molding composites. The method includes substantially filling a pressure chamber with a solid flowable polymer. The pressure chamber has a series of subchambers separated by a series of spaced apart baffles, but connected through baffle openings. A tube connects at least two subchambers, a transferring subchamber and a receiving subchamber. The polymer is displaced through the tube producing a polymer flow in the chamber through the baffle openings from the receiving subchamber to the transferring subchamber causing the receiving subchamber to have a higher pressure than the transferring subchamber. A composite precursor is passed through the pressure chamber by entering the precursor through the low pressure transferring subchamber wherein the composite precursor is exposed to pressure caused by the solid flowable polymer in order to cure the composite.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: January 16, 1990
    Assignee: United Technologies Corporation
    Inventor: Robert V. Kromrey
  • Patent number: 4778642
    Abstract: An arrangement for improved dispensed material bead profile control, in which a viscous material is dispensed in a stream upon a surface. The stream is transported along that surface and forms a bead of the viscous material. The bead is then confined with air streams which also reshape the profile of the bead. The material is dispensed by a nozzle which has at least two orifices in its proximity. One orifice is located at a distance from the nozzle which is greater than for the other orifice. The orifices form air streams under pressure and direct the air streams toward the material stream, as well as toward the bead formed on the surface when the material stream is transported along that surface.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: October 18, 1988
    Assignee: Robotic Vision Systems, Inc.
    Inventors: Jay Lee, Alex Mauro
  • Patent number: 4755343
    Abstract: A flowable particulate polymer-metal mixture that is thermally conductive and is particularly adapted for use as a pressurizing medium in a high pressure elevated temperature molding process. The material comprises a substantially uniform mixture of about 20% to about 90% solid flowable, particulate silicone rubber having a nominal flow rate of at least 0.6 gram/second through a 1.1 cm diameter pipe 7.6 cm long under applied pressure of 10.34 MPa at room temperature. The material also comprises about 10% to about 80% thermally conductive particulate metal that has a melting point less than the molding temperature and is substantially chemically compatible with said silicone rubber. The pressurizing medium is used to mold article precursors into articles by placing an article precursor within a pressure vessel and substantially filling the vessel with a pressurizing mixture.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: July 5, 1988
    Assignee: United Technologies Corporation
    Inventor: Robert V. Kromrey
  • Patent number: 4640711
    Abstract: The method of consolidating a metallic, metallic and ceramic, or ceramic body in any of initially powdered, sintered, fibrous, sponge, or other form capable of compaction, includes the steps:(a) providing a bed of flowable particles within a contained zone, said particulate primarily including flowable and resiliently compressible carbonaceous particles,(b) positioning said body in said bed,(c) and effecting pressurization of said bed to cause pressure transmission via said particles to said body, thereby to compact the body into desired shaped, increasing its density,(d) said body and bed being at elevated temperatures prior to said pressurization step.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: February 3, 1987
    Assignee: Metals Ltd.
    Inventors: Wayne P. Lichti, Alfred F. Hofstatter
  • Patent number: 4625383
    Abstract: A method for seating a gasket in a plastic pipe bell is disclosed which includes providing a peripheral groove in a belling mandrel and seating a specially designed hard plastic ring in the groove. The hard plastic ring is molded to provide exterior ramps for forming an annular pocket in the pipe bell and is inwardly configured to provide a secure seating surface to receive and retain a resilient gasket thereon. The mandrel is urged into a preheated end of the pipe and vacuum forces are employed to pull the end of the pipe about the periphery of the mandrel and tightly against the exterior ramps of the hard plastic ring for forming the bell shape. Upon sufficient cooling of the pipe end, the mandrel is withdrawn and the plastic ring remains encapsulated within the bell shape. Upon removal of the mandrel, a resilient gasket is then seated within the bell in intimate overall contact with the seating surface of the plastic ring.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: December 2, 1986
    Assignee: Vassallo Research and Development Corporation
    Inventors: Efrain D. Vassallo, Jose E. Valls
  • Patent number: 4622197
    Abstract: In a submarine cable optical fibre regenerator housing a copper tail pipe (optionally with a brass end section incorporating an anti-extrusion profile for fitting inside a gland) is provided with a tight fitting length of thermoplastics sleeving by collapsing a thermoplastics preform down onto the tail pipe using heat and air pressure applied to the outside of an elastomeric tube into which the tail pipe and preform have been inserted.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: November 11, 1986
    Assignee: Standard Telephones and Cables Public Limited Company
    Inventor: John C. Crownshaw
  • Patent number: 4496299
    Abstract: A moulding tool unit for semi-isostatic compaction of a powder has a mould cavity (14) defined by an elastomeric jacket (121). The jacket (121) is surrounded with clearance by an elastomeric sleeve (122) which is sealingly joined to the jacket (121). The space (123) between the sleeve (122) and jacket (121 ) is filled with an isostatic pressure translating medium such as a hydraulic liquid (127). The jacket (121) may be supported in a direction towards the sleeve (122) by a stiff jacket (125) having perforations (126) through which the hydraulic liquid (127) can flow. The unit is adapted such that for a pressing operation it can be inserted with a small clearance and pressurized in the dry pressing chamber of a hydraulic press.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: January 29, 1985
    Assignee: KB Cold Isostatic Press Systems CIPS
    Inventor: Ola Pettersson
  • Patent number: 4172107
    Abstract: Composite ceramic articles formed by integrally assembling a plurality of previously molded constituent members without applying an adhesive to their joints and designed to have a density higher than 98% of the theoretical value, and a flexural strength greater than 50 kg/cm.sup.2 at C., and a method of producing ceramic articles of particularly complex shape which comprises the steps of previously molding a plurality of constituent members of complex shape and later integrally assembling said constituent members without applying an adhesive to their joints.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: October 23, 1979
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Kiyoshi Nakamura, Takashi Ishii, Michiyasu Komatsu, Tadashi Miyano, Masae Nakanishi
  • Patent number: 4094672
    Abstract: A method and container for hot isostatic compacting of powder metallurgy charges in a sealed container wherein the container may be both easily removed from the charge after compacting and preserved for subsequent reuse; this is achieved by providing a separating medium between the container interior and the powdered metal charge to prevent bonding during hot isostatic compacting, and removing the compacted charge from the container by introducing fluid under pressure to the container interior to expand the same away from the compacted charge and then providing an opening in the container, preferably at the end thereof, through which the compact is withdrawn.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: June 13, 1978
    Assignee: Crucible Inc.
    Inventors: James N. Fleck, Richard C. Palmer, Charles L. Ruffner
  • Patent number: 4017576
    Abstract: A plug valve whose chamber or bore and whose runs or port passages are fully lined with corrosion-resistant material, most preferably polytetrafluoroethylene, such valve having recesses in its runs, near their intersection with the bore, into which lining material distended by heat and pressure may creep, and with the valve body defining an internally-rounded concave wall or dome at the bottom of the bore. The lining material is formed within the runs so as to be under tension longitudinally between the bore and the outer ends of the runs, and the lining material extends integrally upwardly from the bore and outwardly of the valve body to define a thick collar immediately above the neck of the bore. The valve is manufactured by use of an integral hollow rubber or like forming element comprised of tubular legs, and is placed inside the valve body with one such tubular leg extending through each run and through the bore.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: April 12, 1977
    Assignee: Union Pump Company
    Inventors: Jacob B. Freed, Victor G. Reiling
  • Patent number: 3956452
    Abstract: A method for avoiding cracking of the molded body during the decompression step in an isostatic pressing method of molding. The powders to be molded are housed in a shaping rubber mold, are molded under pressure, and the improvement is characterized by supplying forcibly gas between the outer peripheral surface of a molded body or a shaping thin rubber bag where the molded body is housed and the inner peripheral surface of the shaping rubber mold, the gas having a pressure higher than the isostatic pressure applied to the shaping rubber mold at the time when the shaping rubber mold begins to restore to its original state during the decompression step of the method. An apparatus for the said compression molding which is equipped with a specially designed pressure gas inletting device.
    Type: Grant
    Filed: August 16, 1973
    Date of Patent: May 11, 1976
    Assignee: Shinagawa Firebrick, Co., Ltd.
    Inventor: Shinroku Saito
  • Patent number: 3931382
    Abstract: Method for compacting preheated powder bodies in a high pressure isostatic pressure vessel in which a liquid such as water is used as the pressurizing medium. A preheated workpiece is inserted into the vessel which is closed and sealed. The vessel is then rapidly filled with the liquid pressurizing medium while avoiding contact of the medium with the preheated workpiece until the vessel is substantially completely full. The pressure within the vessel is then increased rapidly to a preselected compacting level by continually pumping the liquid pressurizing medium into the vessel. The preselected compacting pressure is in excess of the critical pressure of the liquid pressurizing medium. The rapid increase of pressure within the vessel to a level exceeding the critical pressure minimizes the amount of vapor that is formed in the vessel and reduces heat transfer from the preheated body to the pressurizing system.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: January 6, 1976
    Assignee: National Forge Company
    Inventor: Donald E. Witkin