Rubber Mold Patents (Class 425/DIG44)
  • Patent number: 6149851
    Abstract: A method and apparatus for the manufacture of fiber reinforced structures. The tooling and its use for the manufacture of reinforced structures is described and illustrated.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: November 21, 2000
    Assignee: Alliant Techsystems Inc.
    Inventors: Mark E. Deckers, Vernon M. Benson, Michael R. McCloy, Todd A. Rosevear
  • Patent number: 6139786
    Abstract: A method of forming a flexible mold (12) and resulting article is provided where a model (10) having the contour of the article to be molded is provided. The model (10) is partially encapsulated within a flexible and substantially liquid impervious layer (14). The combined model (10) and liquid impervious layer (14) is immersed into a curable liquid composition and handle members (36, 38) are inserted into the curable liquid composition. The curable liquid composition (34) is cured having the handles (36, 38) embedded within the composition (34) and subsequent to curing, forms a solid flexible mold encompassing structure (44). Handle members (36, 38) are actuated to release the model (10) from the layer (14) to form the flexible mold (12) for the article to be produced.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: October 31, 2000
    Inventor: Arthur A. Corry
  • Patent number: 6086807
    Abstract: A molding apparatus for forming a molded piece that includes a positive impression of an object, the molded piece comprising a monolithic block that is larger than the object. The apparatus comprises a container in which a negative impression of the object is formed by casting it in a fast-setting flowable compound, and a mold extension that snaps on to the container and provides an additional mold volume that is contiguous with the negative impression. The invention further comprises a mixing apparatus for mixing fast-setting compounds. In one embodiment, the mixing apparatus comprises a cylindrical jar with a screw-on lid. A rod passes through an aperture in the lid and moves axially with respect to the jar. The end of the rod external to the jar is configured as a handle, and the end of the rod internal to the jar is connected to a circular mesh. The circular mesh is oriented parallel to the bottom of the jar and has an outer diameter which is slightly less than the smallest inner diameter of the jar.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: July 11, 2000
    Inventor: Michael Thomas Wilson
  • Patent number: 6077462
    Abstract: An apparatus and method for seamless closed mold microreplication using a one-piece expandable mold are disclosed. The apparatus includes an expandable mold having a plurality of microstructured features on the inner surface thereof. The apparatus also includes a means for elastically expanding the mold in order to remove the finished molded article. The expandable mold may be used to make seamless articles having microstructured features, such as an illumination device comprising a fiber core having a plurality of microstructured light extraction structures on the surface thereof.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: June 20, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: David J. Lundin, Kevin M. Eliason
  • Patent number: 6068464
    Abstract: A gasket defining an axially extending bore therethrough, a front mold having a an edge circumscribing the front mold, wherein the edge is of a size to be complementarily received within at least a portion of the bore of the gasket so that the edge and the bore form a seal therebetween, and a rear mold having a rim circumscribing the rear mold, wherein the rim is sized to be complementarily received within at least a portion of the bore so that the rim and the bore form a seal therebetween. When the front mold and the rear mold are both disposed within the bore of the gasket, a volume is formed between the back surface of the front mold and the front surface of the rear mold and the interior surface of the gasket. A selected one of the front mold or the rear mold is axially and slidably movable within the bore relative to the other mold disposed within the bore to a desired one of a plurality of axial separation distances between the molds, whereby the volume is different for each separation distance.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: May 30, 2000
    Assignee: Technology Resource International Corporation
    Inventors: Kai C. Su, Jack C. White
  • Patent number: 6024555
    Abstract: A tooling concept uses a compliant forming surface for forming composite parts. The tooling concept utilizes a rigid support substructure that has a thin compliant forming surface. In the preferred embodiment of the invention, the tooling concept is used to form a composite sine wave spar. A preferred embodiment of the tooling concept includes upper and lower tool inserts and side tool inserts. The upper tool insert has a compliant forming surface that is located in between a rigid support substructure and the composite material used to form the composite part. Composite prepreg is laid up over a sine wave contour on the upper and lower tool inserts to form upper and lower U-shaped composite workpieces. The upper and lower tool inserts and workpieces are then brought together to form a sine wave I-beam. Radius fillers are then applied to the intersections between the upper and lower composite workpieces and cap strips are placed over the flanges of the joined composite workpieces.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: February 15, 2000
    Assignee: The Boeing Company
    Inventors: Harold M. Goodridge, Kirk D. Skaggs
  • Patent number: 6022209
    Abstract: A lipstick making device includes a mold piece having one or more mold cavities for receiving the lipstick materials and having a pattern extended inward of the mold cavity for forming a corresponding pattern in the lipstick material after the lipstick material is cured. One or more actuators are attached to the mold piece for expanding the mold piece and for disengaging the pattern of the mold piece from the lipstick material and for allowing the lipstick material to be easily removed from the mold piece without damaging the pattern formed in the lipstick material.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: February 8, 2000
    Inventor: Fu Chin Kuo
  • Patent number: 6019588
    Abstract: The invention relates to a moulding apparatus for moulding a chip on a flat carrier, including a mould formed by two mould parts which are movable relative to each other and between which the carrier can be received, the one mould part of which is provided with a mould cavity against the peripheral edges of which the carrier can be pressed, and a device for exerting pressure in at least one cavity for moulding material arranged in the mould and connected to the mould cavity by a runner, wherein at least one compensation element is arranged whereby in the closed position of the mould parts one side of the carrier is held sealingly against the peripheral edge of the mould cavity.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: February 1, 2000
    Assignee: Fico B.V.
    Inventors: Gerardus Franciscus Wilhelmus Peters, Hendrikus Johannus Bernardus Peters
  • Patent number: 6004126
    Abstract: Particularly large-size bell and spigot pipes of ceramic molding material are isostatically pressed within a hollow-cylindrical pressure pot with a molding cavity for the molding compound. An inner core is axially extractable and an elastomeric diaphragm is disposed concentrically around the inner core. The diaphragm is clamped in place at its end face and there is defined between the pressure pot and the diaphragm a chamber which communicates with a source of hydraulic pressure. The inner core is provided with a molding ring on which the bell region of the bell and spigot pipe is formed. The molding ring has a reduced-diameter end region and thus defines two end faces. The two end faces are concentric but axially spaced apart. At least the upper end face of the molding ring is provided with a surface coating of elastic plastic material.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: December 21, 1999
    Inventor: Klaus Strobel
  • Patent number: 5976436
    Abstract: A process for the production of compacted bodies of powdered medicament is disclosed, the process comprising the steps of:a) positioning expansible means along the longitudinal axis of the mold;b) placing loose powdered medicament in the mold; andc) expanding the expansible means perpendicularly to the longitudinal axis of the mold. An apparatus for use in the process according to the invention and medicament compacts formed by the process are also disclosed.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: November 2, 1999
    Assignee: Fisons plc
    Inventors: David J Livesley, Ian M D Gaylor
  • Patent number: 5906840
    Abstract: An apparatus for continuous vacuum forming a material having a flexible patterned belt continuously rotatable with a flat support belt over a vacuum manifold. The flexible patterned belt includes apertures therein and the support belt includes perforations therein for drawing air therethrough. The material is drawn onto the flexible patterned belt for vacuum forming the material.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: May 25, 1999
    Assignee: Bosler Designs Inc.
    Inventors: Kenneth Bosler, Robert Bosler, Ralph Bosler
  • Patent number: 5900181
    Abstract: A method and apparatus for moulding ice statues using a mould formed of a liquid impervious flexible material which defines a mould cavity having the shape of the statue to be formed and a pair of extending wall portions which are held in a juxtaposed attitude during the freezing process. For demolding, the wall portions are moved apart to increase the cross-sectional size of the mould to allow it to be released from the statue formed.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: May 4, 1999
    Assignee: Ice Occasions Pty. Ltd.
    Inventor: Joseph Clarke
  • Patent number: 5891484
    Abstract: The invention includes a device for the manufacture of sandals. The device is formed by a last, covered by the sandal shaft which represents the upper limitation of the cavity of a mold of an injection molding tool. The molding tool is designed for molding a sole onto the shaft in an injection mold cavity, such cavity being formed by lateral parts of the mold and, if necessary, a bottom last portion. The upper edge of the lateral parts of the mold and the complementary contour of the last form a sealing zone for the cavity. In addition, there is provided within the area of the sealing zone, a seal of elastic material, disposed between the last and the lateral parts of the mold. The seal encloses the last completely when the lateral parts of the mold are in their closed position.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: April 6, 1999
    Assignee: Klockner Desma Schuhmaschinen GmbH
    Inventor: Rolf Strussmann
  • Patent number: 5851563
    Abstract: A reconfigurable modular tooling system is provided that approximates the contour of a workpiece to be formed by adjusting the height of an array of pins, each of which represents the contour of the workpiece at that point. A flexible sheet is supported by the pins such that movement of the pins into their contoured position adjusts the flexible sheet forming a mold for a composite part to be manufactured. The modular tooling unit is comprised of a hard rubber which functions to lock the array of pins in position. The locking function of the pins is obtained when the pins are rotated in apertures that match the shape of the pins within the hard rubber tooling unit which distorts the shape of the apertures and locks the pin in position.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: December 22, 1998
    Assignee: McDonnell Douglas Corporation
    Inventor: Peter L. Hoffman
  • Patent number: 5846464
    Abstract: A method of forming composite parts that consist of the steps of generating a part design in a computer graphics system, positioning an array of rubber blocks having an array of apertures with slidable pins therein and locking the rubber blocks together on a servo drive mechanism forming a tooling fixture. The array of pins has a flexible face sheet connected to them such that the array of pins is adjusted to form the face sheet to approximate the contour of the composited part to be manufactured. The tooling module is then removed from the base servo drive mechanism and used as a mold in an autoclave for cutting composite materials.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: December 8, 1998
    Assignee: McDonnell Douglas Corporation
    Inventor: Peter L. Hoffman
  • Patent number: 5843325
    Abstract: A mold assembly has a cylindrical inner mold device, and a plurality of outer mold devices enclosing the cylindrical inner mold device. The inner mold device has a threaded interior engaging with a lower portion of a hollow threaded cover and a flange surrounding an outer periphery of the inner mold device. Each of the outer mold devices has a silicone mold and an aluminum mold enclosing an outer periphery of the silicone mold. Each of the silicone mold has at least a pattern cavity. A spacing is defined between the inner mold device and the outer mold devices. An upper annular retainer retains an upper portion of the mold assembly. A lower annular retainer retains a lower portion of the mold assembly.
    Type: Grant
    Filed: June 1, 1997
    Date of Patent: December 1, 1998
    Inventor: Chen Sou-San
  • Patent number: 5820894
    Abstract: A consolidation apparatus includes a female mold having a first portion and a second portion, a movable caul plate within the first portion of the female mold, and a pressure bladder disposed between the caul plate and the second portion of the female mold. A pressurization line communicates between the interior of the pressure bladder and a gas source exterior to the female mold, and an evacuation line communicating between the unfilled space between the caul plate and the second portion, and a vacuum source exterior to the female mold. In using the apparatus, a workpiece is loaded into the first portion of the female mold between the caul plate and the first portion. The consolidation apparatus and the workpiece contained therein are heated, a pressure is applied to the pressurization line, and a vacuum is simultaneously applied to the evacuation line.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: October 13, 1998
    Assignee: McDonnell Douglas Corporation
    Inventor: Robert William Kreutzer
  • Patent number: 5807593
    Abstract: A process and method for manufacturing fiber reinforced composite structures without trapping volatiles in the resin matrix. Volatiles from the curing cycle are absorbed into a silicone rubber layer,and a gas impermeable barrier layer outside the silicone rubber layer prevents autoclave atmosphere from permeating into the part. The process is to layer the finished ply build-up, with a ply of FEP (fluorinated ethylene propylene), a layer of silicone rubber to absorb the volatiles, and a layer of impermeable elastomer. The layer of fluoroelastomer is bonded to the silicone rubber to form a reusable, impermeable elastomeric vacuum bag, eliminating the need for disposable edge and surface breathers.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: September 15, 1998
    Assignee: The Boeing Company
    Inventor: Michael P. Thompson
  • Patent number: 5798129
    Abstract: The present invention is directed to a resilient and self-locking mold for the prototype molding of an object using a liquid resin, the mold comprising first and second mold portions matable to form a mold of the object, the first mold portion having a first opposing mold face with a cavity therein corresponding to the size and shape of the object to be molded, the second mold portion having a second opposing mold face with a core thereon corresponding to the back of the object to be molded, the opposing mold faces of the first mold portion and the second mold portion, upon mating, defining a void therebetween, the void corresponding in size, shape and thickness, to the object to be molded, the void further having a first orifice for providing resin therein, a second orifice for removing air therefrom, the first mold portion and second mold portion further having opposing members of a resilient interlocking pair on the opposing mold faces, the interlocking pair members when interlocked, providing a resilient
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: August 25, 1998
    Inventor: Bruce A. Megleo
  • Patent number: 5786003
    Abstract: The improved half-die comprises a concave rigid support describing a chamber superiorly closed by an elastic wall and containing a pressurised incompressible fluid. The chamber internally comprises a lattice which divides it into a plurality of cavities which are interconnected by means of communication holes; each cavity is occupied by an obturator which is solidly anchored to the elastic wall and free of the walls of the relative cavity. Should there be a loss of fluid pressure, which can occur only through an inlet hole and an outlet hole used for introducing the fluid during a construction phase of the half-die and subsequently closed, the obturators prevent any further fluid from exiting during a pressing operation and enable the half-die to keep working.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: July 28, 1998
    Assignee: F.D.S. S.r.L.
    Inventor: Ivano Debbia
  • Patent number: 5776401
    Abstract: A method for manufacturing rubber molds using a mold making apparatus having first and second discs of rubber mold material with models of articles to be cast positioned therebetween includes a bottom plate having a centrally located portion which engages the first sheet of rubber mold material and an outer reduced thickness flange, and a top plate which overlies the bottom plate. The top plate has a centrally located portion which engages the second sheet of rubber mold material and an outer reduced thickness flange corresponding to the flange of the bottom plate when disposed over the bottom plate. A plurality of thumb turn members are provided for tightening the top plate towards the bottom plate by hand. The arrangement is such that the models disposed between the first and second discs of rubber mold material form mold cavities therein.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: July 7, 1998
    Assignee: Conley Casting Supply Corp.
    Inventor: Douglas J. Goss
  • Patent number: 5773039
    Abstract: An apparatus for simultaneously casting a large volume of wax patterns in a reduced amount of time in an air-free environment. The invention utilizes a direct controlled pressure wax injection system to inject melted wax into a central portion of a multi-cavity rubber mold having an upper and lower portion, and then provides an evenly distributed clamping pressure to the mold.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: June 30, 1998
    Inventor: Earl S. Jones
  • Patent number: 5762967
    Abstract: A elastically and reversibly deformable rubber mold for producing powder compacts is made of a material at least a part of which is a mixture of rubber and magnetic powder. In use, this rubber mold filled with the magnetic powder and subjected to a magnetic field and pressure with punches, thereby compressing the powder to form powder compact. This makes the distribution of magnetic field in the cavity of the rubber mold more homogeneous, and therefore, the distortion, cracking and chipping caused by inhomogeneity of the distribution of the magnetic field are reduced, so that the shape of the resultant powder compact is closer to the end product.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: June 9, 1998
    Assignee: Intermetallics Co., Ltd.
    Inventors: Masato Sagawa, Hiroshi Nagata, Toshihiro Watanabe
  • Patent number: 5714179
    Abstract: A tooling concept having a compliant forming surface for forming composite parts. The tooling concept utilizes a rigid support substructure that has a thin compliant forming surface. In the preferred embodiment of the invention, the tooling concept is used to form a composite sine wave spar. A preferred embodiment of the tooling concept includes upper and lower tool inserts and side tool inserts. The upper tool insert has a compliant forming surface that is located in between a rigid support substructure and the composite material used to form the composite part. Composite prepreg is laid up over a sine wave contour on the upper and lower tool inserts to form upper and lower U-shaped composite workpieces. The upper and lower tool inserts and workpieces are then brought together to form a sine wave I-beam. Radius fillers are then applied to the intersections between the upper and lower composite workpieces and cap strips are placed over the flanges of the joined composite workpieces.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: February 3, 1998
    Assignee: The Boeing Company
    Inventors: Harold M. Goodridge, Kirk D. Skaggs
  • Patent number: 5698154
    Abstract: In charging a fluid molding material in an elastic molding die composed of a die body having an opening and a die support portion extending from the opening to the outside by pouring the molding material from the opening into time die body, the molding material in an amount of 1/5 to 3/5 of a volume of the die body is first charged, a molding material-charged portion of the die body is then crumpled or pinched, and then the entire die body is filled up with the molding material. The crumpling or pinching operation is achieved by such means as a blade shutter, pressing plates, air bags, or passing between two plates or conveyor belts, thereby charging the fluid molding material in the die body of the elastic-molding die without occurrence of air voids.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: December 16, 1997
    Assignees: Asahi Denka Kogyo Kabushikikaisya, Okamoto Industries, Inc.
    Inventors: Hiroshige Kohno, Satoru Hamada, Osamu Tsuchiya, Akinori Watanabe, Itaru Horiguchi, Atsushi Sato
  • Patent number: 5686119
    Abstract: Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding).
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: November 11, 1997
    Assignee: Kennametal Inc.
    Inventor: Robert R. McNaughton, Jr.
  • Patent number: 5672363
    Abstract: An apparatus for producing a green compact includes a circuit that circulates die assemblies, each of which contains a rubber mold having rubber in at least its side portion. The apparatus also includes a high density filling device that has a feeder for feeding powder into the rubber molds; a pusher or a vibrator or both a vibrator and a pusher; a die press machine configured to impart a compaction force sufficient to produce the green compact to each of the circulating die assemblies in succession; and a device for removing the green compact from each rubber mold. The high-density filling device, the die-press machine and the removing device are successively arranged along the circuit. Each of the circulating die assemblies has sufficient structural integrity to withstand the compaction force because all structure necessary to withstand the compaction force is present in the circulating die assemblies.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 30, 1997
    Assignee: Intermetallics Co., Ltd.
    Inventors: Masato Sagawa, Hiroshi Nagata, Hiroo Shirai
  • Patent number: 5665301
    Abstract: A unitary vacuum bag for forming of a fiber reinforced composite article, made of a fabric mesh reinforced curable elastomer, having a smooth surface on both sides. The bag is constructed upon the surface of the article which is to be reproduced and upon a planar flange extension of the mold for said article. A rigid vacuum chamber assembly consisting of a planar fiber reinforced composite or equivalent sheet is sealed on the outer periphery to the mold flange extension and on the inner periphery to the top surface of the bag by rubber seals which are attached to the vacuum chamber assembly under surface. A vacuum port through the vacuum chamber assembly between the rubber seals allows vacuum to be applied to the chamber causing it to be pressed by atmospheric pressure to the mold flange extension and bag periphery thus sealing the bag to the mold periphery and simultaneously providing a continuous vacuum source around the entire periphery of the bag.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: September 9, 1997
    Assignee: Arctek Inc.
    Inventor: John Sulo Matias Alanko
  • Patent number: 5648109
    Abstract: Apparatus and methods for forming an article of advanced composites on a tool forming surface from a preform are disclosed. Apparatus includes, according a preferred embodiment, a tool forming surface, a first diaphragm for urging a preform into conforming contact with the tool forming surface, and a second diaphragm for supporting a side of the preform opposite the side engaged by the first diaphragm during forming. The second diaphragm does not extend completely between the preform and the tool forming surface. The apparatus is arranged with a first diaphragm mountable on the apparatus and conformable to a preform to be formed and a second diaphragm mounted on the apparatus and conformable to a portion of the preform simultaneously with the first diaphragm. A forming tool is provided, including a tool forming surface positionable for receiving the preform between the first diaphragm and the second diaphragm when the first and second diaphragms are mounted on the apparatus.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: July 15, 1997
    Assignee: Massachusetts Institute of Technology
    Inventors: Timothy G. Gutowski, Gregory P. Dillon, Sukyoung Chey, Haorong Li
  • Patent number: 5641525
    Abstract: Disclosed herein is a resin transfer molding apparatus including a female mold member having a rigid surface including a main surface portion, and a recessed surface portion extending inwardly from and bordered by the main portion to define a recessed area, and a male mold member including a structure which is adapted to be drawn into close association with the rigid surface of the female mold member in response to the application of vacuum therebetween and which includes a member which is at least partially flexible and which includes an inner surface located, during the application of vacuum, in relatively adjacent opposing relation to the main surface portion of the female mold member and in relatively spaced relation to the recessed surface portion, and a segment which is relatively rigid, which has a shape conforming to the recessed area, which is fixedly bonded to the inside surface of the member, and which is located, during the application of vacuum, in relatively adjacent opposing relation to the rec
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: June 24, 1997
    Assignee: Outboard Marine Corporation
    Inventor: Dale S. Yakel
  • Patent number: 5639416
    Abstract: A process for molding dimensionally accurate plastic articles using a low pressure injection molding technique. The process utilizes a two-piece silicone rubber mold having a cavity representative of the shape of the article to be molded. The mold is substantially encased on all sides in a rigid mold box to prevent deformation of the cavity during the molding process (10). The mold box and the encased mold are placed in a vacuum chamber, and a vacuum is drawn on the chamber to evacuate the cavity (20). A predetermined amount of a reactive mixture is simultaneously mixed and injected under pressure into the mold to form the plastic article (30). The amount of material injected is sufficient to fill the cavity but not sufficient to distort the cavity. The chamber is vented (40) and the mold is removed from the mold box (50). The mold is flexed in order to remove the plastic article from the mold (60).
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: June 17, 1997
    Assignee: Motorola, Inc.
    Inventors: Robert W. Pennisi, Gregory D. Jackson, Glenn F. Urbish, Louis D. Megleo
  • Patent number: 5500178
    Abstract: A method of manufacturing hollow molded articles having a beautiful surface at a low cost and by a simple and efficient process includes providing a hollow elastic molding die made of an elastic film and having an opening port, feeding a material to be molded of an amount smaller than the internal volume of the elastic molding die into the elastic molding die through the opening port, closing the opening port, solidifying the material to be molded while the elastic molding die is rotated to all directions, and parting the solidified hollow molded article from the elastic molding die. Arrangement for preventing the elastic molding die from being deformed while it is rotated to all directions includes holding it firm by a solid holding member conforming to the external shape thereof or by positioning it in a fluid or powdery material holding member.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: March 19, 1996
    Assignees: Asahi Denka Kogyo Kabushikikaisya, Okamoto Industries, Inc.
    Inventors: Toshihiro Hayashi, Hiroshige Kohno, Akinori Watanabe, Itaru Horiguchi
  • Patent number: 5413748
    Abstract: A mold apparatus and method for forming encapsulated glass which includes the use of a plurality of mold sections 10 and 12 which, when closed, cooperate with a sheet 5 and at least one seal 25 to define a gasket forming cavity 35. When a gasket forming material is injected into the gasket forming cavity 35 and is allowed to at least partially cure, a gasket 2 is formed on at least a portion of the sheet 5 to produce a window gasket assembly 50. A seal 25 with an outwardly angled facing portion 27 defines an interior face 37 of the gasket forming cavity 35 and prevents leakage of the gasket forming material and the formation of flash on the sheet 5. In one embodiment of the invention, the mold section 12 is made of a resilient material and mold section 10 is made of a rigid material. In another embodiment of the invention, mold section 12 has positioned therewithin a rigid member 45 having a finishing surface 48 which cooperates with the seal 25 and the sheet 5 to define a gasket forming cavity 35.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: May 9, 1995
    Assignee: Vidrio Plano De Mexico, S.A.
    Inventor: Luis A. A. M. Garza
  • Patent number: 5405566
    Abstract: A module, such as a terminal block (10), configured of a body (12) having an open end (20) and at least one window (24) spaced from the open end, is fixtured and sealed by way of a channel (28) comprised of a pair of parallel, spaced-apart, generally elastic walls (30,32) jointed by a bottom member (34). The walls (30,32) and the bottom member (34) run longitudinally a distance at least as long as the width of the terminal block (10) to allow the block to be received between, and to be held by, the walls. At least one protrusion extends out from a separate one of the walls (30,32) and the base member (34) for receipt in the window (24) in the terminal block to seal the same.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: April 11, 1995
    Assignee: AT&T Corp.
    Inventors: Peter F. Lilienthal, III, Ivan Pawlenko, Ching-Ping Wong
  • Patent number: 5380182
    Abstract: This invention relates to the use of a flexible, heat resistant mold member. The mold member is useful in molding processes such as dip or slush molding. The mold member maintains its structural integrity and may therefore be used as an insert in the article being molded to provide flexible stability at specific locations within the article. The mold member is made of a material which is substantially non-reactive with the molded article. The molded article may be any article made from a plastisol such as a binaural for a stethoscope having single or double lumens.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: January 10, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas J. Packard, James H. Quackenbush
  • Patent number: 5369215
    Abstract: Polymeric feedstocks, such as scrap or waste tires, rubber, and plastics, in a size range of -6 to +25 mesh are washed with an organic solvent to remove stabilizing additives which have migrated to the surface of the polymer particles, thus eliminating the stabilizers from participation in subsequent reactions and allowing the final production of more pure monomeric products. The polymer particles are exposed to ozone under conditions to cause stress cracking, fissuring and cleavage of the polymer feedstock particles. The ozonated polymer particles are depolymerized to produce one or more monomeric compounds, with the reaction taking place rapidly and occurring in the presence of a system of one or more catalysts which may be metallic salts. The depolymerization is accomplished under conditions of elevated temperatures and reduced pressure, the conditions being less severe than those conditions associated with thermal pyrolysis.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: November 29, 1994
    Assignee: S-P Reclamation, Inc.
    Inventor: Gerald A. Platz
  • Patent number: 5368804
    Abstract: A method of molding a composite bicycle frame that includes the steps of curing a pair of seat stays and chain stays respectively and then connecting with the front triangle. Non-foaming dilatable materials are provided at suitable locations in the mold, such as the steering support cavity, the pedal support cavity, the seat stay butting cavity and the chain stay butting cavity. By heating the mold once, the seat stays and chain stays will secure with the front triangle and the front triangle can be cured at the same time to simplify the mold and the process.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: November 29, 1994
    Assignee: Industrial Technology Research Institute
    Inventors: Jen-Loong Hwang, Sheng-Long Wu, Yu-Hsuan Chen, Chin-I Lin
  • Patent number: 5344296
    Abstract: A method and apparatus for forming runners (47, 56) in a mold assembly (10, 50). The mold assembly (10, 50) has a cavity plate (11, 51) and a sealing plate (12, 52). The sealing plate (12, 52) has a sealing plate cavity (18) in which a resilient material (14) is placed. A floating seal (13) is movably mounted to the sealing plate (12) such that the floating seal (13) is on the resilient material (14). A workpiece (19) is placed on the resilient material (14) and the cavity plate (11, 51) is mated with the floating seal (13) thereby forming the runners (47, 56). The resilient material (14) imparts a force on the floating seal (13) and pushes the floating seal (13) against the cavity plate (11, 51) to prevent leakage of encapsulating material from the runners (47, 56).
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: September 6, 1994
    Assignee: Motorola, Inc.
    Inventor: Albert J. Laninga
  • Patent number: 5340512
    Abstract: An improved electrical insulator for high voltage transmission lines is formed from certain polymer-based concrete compositions. An apparatus provides for the molding of the polymer-based mixture to form a highly degassed product. The method and apparatus include the ability to combine the constituents of the mixture in a mixer. A vacuum is applied to the mixture to degas the mixture. A mold is filled with the degassed mixture without introducing air thereinto in the absence of a vacuum. The resulting insulator has highly reduced air entrainment.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 23, 1994
    Assignee: Thomas & Betts Corporation
    Inventors: John Slocum, Peter N. Kiproff, Daryl Gibson, Will Merritt
  • Patent number: 5332190
    Abstract: An elastic molding die is composed of an elastomer laminate film, of which the innermost layer is formed of an elastomer not containing fillers. The innermost layer elastomer is preferably an oil-resistant elastomer. Alternatively, an oil-repellent agent may be contained in the innermost layer elastomer. The outer layer may be formed of an elastomer containing fillers. Furthermore, an oil blocking layer can be provided between the inner layer and the outer layer. A master model is dipped in an elastomer solution not containing fillers, heat dried to form a gelled elastomer film, the film is coated with a coagulant, dipped again in an elastomer solution, taken out, gelation treated, and the elastomer film is peeled from the master model to obtain an elastic molding die. In another method, a once-formed hollow elastic molding die is turned inside out, pressed in with a gas to swell, the swollen die is coated with an elastomer solution not containing fillers, heat dried, and turned it again inside out.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: July 26, 1994
    Assignee: Okamoto Industries, Inc.
    Inventors: Akinori Watanabe, Itaru Horiguchi, Tsuguyo Ando, Atsushi Sato
  • Patent number: 5330346
    Abstract: The invention relates to a die for ceramic tiles. The die includes two semi-dies between which the material to be compacted is pressed. One of the half-dies is connected to an elastic wall. An external face of the elastic wall has the imprint of one of the faces of the tile to be manufactured. The elastic wall is positioned over and in contact with a cavity that is filled with an incompressible liquid. The cavity is divided into portions by a lattice.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: July 19, 1994
    Assignee: Sichenia Gruppo Ceramische S.p.A.
    Inventor: Italo Scardovi
  • Patent number: 5314653
    Abstract: A uniformly expandable mold is formed with a continuous surface defining a three-dimensional pattern for replicating an article. The relative pressure between the inside of the mold and the outside controls the area of the surface to change the size of the three-dimensional pattern without distorting the relative dimensional relationship of the component segments forming the pattern whereby material may be deposited on the mold surface with the mold expanded to a desired size. The pressure differential is increased to increase the size of the mold and stretch the layer already deposited thereon. A second, dissimilar layer is bonded to the first layer while it is streched When the article is removed from the mold, a state of relative expansive/compressive tension is created at the bond interface between the first and second layers which forces the material of one layer to enter voids in the other layer to seal defects.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: May 24, 1994
    Assignee: Harold Gell, P.C.
    Inventor: Constantine Haralambopoulos
  • Patent number: 5282734
    Abstract: A mandrel for manufacturing a hollow composite material body. The mandrel is formed by a homogeneous graphite felt block whose fibers are embedded in a pyrolysis carbon matrix. The densification of the arrangement of fibers forming the hollow body is carried out in a neutral atmosphere.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: February 1, 1994
    Assignee: Aerospatiale Societe Nationale Industrielle
    Inventors: Nicole Pastureau, Patrice Dourthe
  • Patent number: 5275547
    Abstract: A mold assembly (10) for injection molding material including a mold base (12), a clamping plate (14) and a flexible membrane (16). The flexible membrane has a retainer portion (29) engaged within a groove (28) in the mold base, and secured in position clamped intermediate the clamping plate and mold base. The clamping plate and membrane form a mold cavity (54) having a desired configuration for forming the molding material injected into the mold assembly (10). The mold base (12) and flexible membrane (16) form a pressure cavity (56) which is supplied with fluid during the injection of molding material into the mold assembly, to support the flexible membrane (16) in the desired position.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: January 4, 1994
    Assignee: GenCorp Inc.
    Inventor: Robert L. Brown
  • Patent number: 5264640
    Abstract: Scrap rubber chunks from used tires are processed and the monomeric chemicals from which the tire rubber was synthesized are recovered. Rubber chunks reduced to a finely divided size are exposed to gaseous ozone to break down the cross-linked structure of the rubber. Subsequent thermal depolymerization occurs in a reactor chamber. Finely divided silica is introduced within the reactor to prevent agglomeration of rubber particles and to enhance the maintenance of a uniform reactor temperature. Reduced pressure within the reactor permits rapid removal of monomer vapors. Once the monomer vapors are separated, silica and carbon residues are recovered separately for either recycle or disposal.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 23, 1993
    Assignees: S-P Reclamation, Inc., John S. Schwab
    Inventor: Gerald M. Platz
  • Patent number: 5263844
    Abstract: An elastic mold consists of a product molding section in which a fluidized charging material is charged and solidified to form a molded product, and a mold holding section formed integrally with a take-out opening which is contiguous to the product molding section and which is smaller in size than the molded product. The take-out opening contiguous to the product molding section and the mold holding section is of uniform thickness and is curved smoothly.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: November 23, 1993
    Assignee: Akutagawa Confectionery Co., Ltd.
    Inventor: Tokuji Akutagawa
  • Patent number: 5221542
    Abstract: The invention provides a method and apparatus for making an electrochemical cell solid electrolyte holder. A layer of solid electrolyte powder or its precursor is formed around an externally screw threaded mandrel. The powder is pressed to form the holder in a green state with internal threads formed by the mandrel. The mandrel is screwed axially out of the green holder, after which the green holder is sintered. In the apparatus there is a mandrel which has external threads, and a flexible sheath. The mandrel is receivable in the sheath to provide an annular space around the mandrel for receiving a powder to be isostatically pressed by the sheath. The space is provided between the sheath and a mould, but can, instead, be provided between the mandrel and sheath, or between two sheaths between the mould and mandrel.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: June 22, 1993
    Assignee: Programme 3 Patent Holdings
    Inventor: Johan Coetzer
  • Patent number: 5204042
    Abstract: In a process for forming composite laminate parts from reinforcing fibers and resin, a mold is selected which has a mold cavity having a part definition surface therein and a resin passageway leading to the cavity. An expansion member capable of expanding to a larger volume in response to heat is located in the cavity in conjunction reinforcing fibers which will form a part of the composite laminate part. The mold cavity is closed and resin is injected through the resin passageway to saturate the fibers. The expansion member is heated to expand the expansion member an amount sufficient to consolidate the resin and the reinforcing fibers between the expansion member and the part definition surface to shape the fibers and the resin into a component laminate part mimicking the shape of the part definition surface and to expel any excess resin from the cavity to the passageway.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: April 20, 1993
    Assignee: Northrop Corporation
    Inventors: Darryl G. James, Aubrey G. Jackson, Jr., Stephen M. Novak
  • Patent number: 5198232
    Abstract: A mould for an injection moulding apparatus, the moulding including at least two mould parts which mate to form the mould cavity and which separate to permit removal of the moulded article, each mould part including a relatively rigid body having an abutment face which abuts with an abutment face of the other mould part when said parts mate, the body of at least one mould part including a recess in its abutment face which is filled with a resilient material defining a portion of said mould cavity.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: March 30, 1993
    Assignee: Games Workshop Limited
    Inventors: John B. Thornthwaite, Robert Naismith
  • Patent number: 5194268
    Abstract: A method and apparatus for injection molding of ceramic suspensions is disclosed wherein an elastomeric bladder is disposed within a mold cavity of a mold. The elastomeric bladder, in a relaxed state, can be tubular or can be formed by bonding together sheets of material. A ceramic suspension is injected into the elastomeric bladder, whereby the elastomeric bladder is distended. Distention of the elastomeric bladder applies a significant force to the ceramic suspension for preventing jetting and formation of knit lines within the ceramic suspension. The ceramic suspension distends the elastomeric bladder until the mold cavity is filled. The ceramic suspension is then exposed to conditions sufficient to cause the injected ceramic suspension to form a molded ceramic greenware composite. The molded ceramic greenware composite can then be removed from the mold for drying and for debindering and densification to form a finished ceramic part.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: March 16, 1993
    Assignee: The Dow Chemical Company
    Inventors: Norbert L. Bradley, Virgil W. Coomer