Including Securing Means Retaining Separable Elements Patents (Class 425/192R)
  • Patent number: 6165407
    Abstract: A mold assembly for molding a thermoplastic resin, which comprises; (a) a first mold member and a second mold member for manufacturing a molded article of a thermoplastic resin, (b) an insert block provided in the first mold member, said insert block constituting part of a cavity, having a thickness of 0.1 mm to 10 mm and being formed of a material having a thermal conductivity of 2.times.10.sup.-2 cal/cm.multidot.sec.multidot..degree.C. or less, and (c) a molten thermoplastic resin introduction portion provided in the second mold member, wherein an insert block covering portion is formed in the second mold member, and when the first mold member and the second mold member are clamped to each other, (A) a clearance between the insert block and the insert block covering portion is equal to, or less than, 0.03 mm, and (B) an amount of overlapping of the insert block and the insert block covering portion is equal to, or greater than, 0.5 mm.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: December 26, 2000
    Assignee: Mitsubishi Engineering-Plastics Corp.
    Inventors: Hisashi Tahara, Takayuki Ito
  • Patent number: 6162038
    Abstract: The retractable die clamp for a pellet mill includes a clamp segment having a generally C-shaped cross-section with radial extending flanges for wedging the die ring flange and mounting or quill flange of the pellet mill frame against one another, securing the ring to the frame. The clamp includes end bolts threaded into the mounting flange. A centrally located Acme fastener has an externally threaded sleeve and a bolt extends through the sleeve and is threaded into the mounting flange. The Acme fastener also includes an internally threaded nut restrained on the clamp for limited axial movement. The nut is also rotatable relative to the clamp to back the clamp radially away from the mounting flange to retract the clamp from the ring and mounting flanges. The Acme fastener also maintains the clamp attached to the frame by the bolted connection when the clamp is backed off the mounting and die ring flanges.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: December 19, 2000
    Assignee: Consolidated Process Machinery, Inc.
    Inventor: Mark E. Cefaretti
  • Patent number: 6158999
    Abstract: Apparatus for extruding an elongated article comprising a die having an opening therethrough; an extruder for discharging extrudable material through said die opening; structure for rotational movement between said die and said extruder so as to provide said elongated article having a rotational profile.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: December 12, 2000
    Inventors: Steven Hartman, David Hartman
  • Patent number: 6149420
    Abstract: A core mold that has a mounting hole on its molding surface and a changeable indicia forming section that is used to form markings on an external surface of injection molded products. The indicia forming section is located on one end of a changeable indicia forming insert. The insert is detachably inserted into the mounting hole of the core mold. A step is also used to prevent the changeable indicia forming insert from moving relative to the core mold. The changeable indicia forming insert is detachably inserted to the core mold so that the indicia forming section is easily changeable by changing the insert. This avoids the delays caused by using core molds and inserts bearing indicia forming sections that are integrally formed from a unitary piece of material. Additionally, the information conveyed by the markings is greater than that possible using core molds with rotary cores.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: November 21, 2000
    Assignee: SamSung Electronics Co., Ltd.
    Inventors: Kwan Sub Kim, Young Cheol Kim
  • Patent number: 6142762
    Abstract: The accumulator of an extrusion blow molding machine is constructed to include a stroke positioner that comprises inter-engaging, threaded components that enable the piston of the programming cylinder to be adjusted relative to the inner rod of the programming system in the accumulator assembly. Since the inner rod ultimately connects to the die pin, this adjustment directly determines the position at which the piston in the programming cylinder will close off the die gap. In particular, the components of the programming system can be adjusted so that the die gap is closed just as the piston of the programming cylinder reaches the limit of its stroke.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: November 7, 2000
    Assignee: Milacron Inc.
    Inventor: Lynn M. Tore
  • Patent number: 6142761
    Abstract: An optical disc molding apparatus is able to mold an optical disc in which the occurrence of swollen portions of trumpet shape on the upper and lower surfaces of on the outer peripheral portion of a disc base may be minimized and in which a burr may be prevented from being produced on the outer peripheral portion of the disc base. In the optical disc molding apparatus having a ring (6) for molding an outer diameter portion of a disc base and holding a stamper (5) for transfer a signal pit, a holding surface of the ring (6) for holding the stamper (5) is formed as the concave and convex surfaces comprising a plurality of concentric land portions (21) and a plurality of concentric groove portions (22). The outer peripheral surface of the stamper (5) is held by each land portion (21) with a pressure.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: November 7, 2000
    Assignee: Sony Corporation
    Inventors: Nobuyuki Arakawa, Yuji Akiyama, Ken Minemura
  • Patent number: 6139307
    Abstract: A mold assembly for forming a replica disk in a disk molding process. The replica disk includes a formatted surface on both sides. The mold assembly includes a disk substrate cavity defined by a first block having a first major surface, a second block having a second major surface, and an outside edge. The first stamper has an outside edge. The first outer holder includes a first holder edge, the first holder edge extends over the outside edge of the first stamper, coupling the first stamper to the first major surface. A second stamper having an outside edge is coupled to the second major surface. A channel is provided in fluid communication with the disk substrate cavity for allowing disk molding material to enter the disk substrate cavity. Further, a stripper mechanism may be located at the outside edge, wherein the stripper mechanism is moveable relative to the first block and the second block.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: October 31, 2000
    Assignee: Imation Corp.
    Inventors: Douglas R. Plourde, Dean E. Sitz, Val M. Schmitz
  • Patent number: 6135752
    Abstract: A forming die including of a holder having an upper portion and a lower portion, each portion having a main substrate extending in a first longitudinal direction. A fixing substrate is located on one end of the main substrate and a movable substrate is located on an opposite end of the main substrate and is movable along the main substrate in the first longitudinal direction. A plurality of die forming segments are situated between the movable substrate and the fixing substrate. Tie rods extend along the main substrate outside the periphery of the plurality of die forming segments, and connect the movable substrate and the fixing substrate to one another.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: October 24, 2000
    Assignee: NGK Insulators, Ltd.
    Inventors: Akio Enomoto, Shinji Tada, Hiroshi Kashiwagi
  • Patent number: 6126430
    Abstract: A die clamp assembly for an extruder comprises at least one passage through which product being extruded flows. The die clamp assembly is attached to an extruder and comprises at least one adapter plate that is connectable to the extruder. The die clamp assembly also comprises at least one adapter plate passage that communicates with the passage of the extruder; at least one die body comprising at least one die body passage that communicates with the adapter plate passage; and at least one die plate that comprises at least one die plate passage that communicates with the die body passage and at least one opening so product can be extruded from the at least one opening. A clamp collar assembly connects corresponding peripheral surfaces of the adapter plate to the die body, and comprises a closed position that connects the adapter plate to the die body and an open position that permits separation of the adapter plate and the die body.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: October 3, 2000
    Assignee: General Electric Company
    Inventors: Dennis Joseph Coyle, Fernando Alves Silva, Eric Thomas Gohr, Ricky Joe Renschler
  • Patent number: 6120275
    Abstract: A mold for use in a gas-assisted injection molding system includes a gas pin assembly which can be readily removed from one mold half in an open position of a mold wherein a porous insert of the assembly can also be readily removed from the housing of the assembly for easy servicing. The housing of the assembly has an elongated aperture formed therethrough in communication with a gas passageway in the mold to permit the flow of gas therethrough. The porous insert is positioned in the aperture. The insert permits the flow of gas therethrough but prevents the passage of molten plastic therethrough. The assembly also includes a holding device preferably in the form of a set screw which has a gas hole formed completely therethrough to permit the flow of gas therethrough. The set screw is threadedly secured within the housing to hold the insert stationary within the aperture and to permit ready removal of the insert from the housing after the set screw has been removed from the housing.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: September 19, 2000
    Assignee: Larry J. Winget
    Inventors: Larry J. Winget, John F. Murphy
  • Patent number: 6120279
    Abstract: A mold insert (12) is held down in a mold base (16), released, and then ejected upwardly, by positioners (30, 32) that each includes a lock member (50) and an eject member (52). The mold insert has a recess (40) in each side along its front portion and has a largely downwardly-facing shoulder (42) at each side along the rearward portion thereof. Two largely cylindrical bores (44, 46) are formed in the mold base and each communicates with the recess and shoulder at each side of the mold insert. When the lock member is pivoted about the bore axis (54,56), a lock part (74) is moved out of the recess in the mold insert to allow the mold insert to move up out of the mold base. When the ejector member is pivoted about the bore axis, a radially-projecting ejector part (80) moves upwardly against the shoulder on the mold insert to push up the mold insert so its upper end lies above the mold base and can be lifted out.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: September 19, 2000
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Terry Vovan
  • Patent number: 6116887
    Abstract: The present invention provides foam molding equipment which has an advantage in performing exchange of a molding dies within a short time period and in improving productivity thereof, and which is most suitable, in particular, to the case of using upsized molding dies. The equipment is provided with a fixed die base 21, movable die base 8, a die opening/closing mechanism to move the movable die base 8 together with a movable die 12, and a base frame 1. The fixed die base 21 is detachable from the base frame 1. Molding dies comprising a stationary die 11 and a movable die 12 is preliminarily attached to the fixed die base 21 to form a unit 20. The base frame 1 is provided with a loading surface 4 to load the unit 20 and a unit connector 27 to fix the unit loaded on the loading surface 4 to the base frame 1. The unit 20 is loaded on the loading surface 4 in a detachable manner.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: September 12, 2000
    Assignee: Aisin Takaoka Co., Ltd.
    Inventors: Yuichi Yamada, Osamu Shimomura, Masaki Yonezawa, Hirozi Kamiya, Ken Ohshima
  • Patent number: 6109904
    Abstract: A mold closing unit is provided with a device for handling and/or removal of moldings, comprising a supporting element for supporting the device in the area of the mold, an actuating element, by which handling element penetrating into the mold cavity is operable, as well as a drive unit for driving the actuating element. The drive unit drives the actuating element electromechanically and at least drive unit, supporting element and actuating element constitute structural unit which is detachable from the mold closing unit. The drive unit is a hollow shaft motor at least partially receiving the actuating element.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: August 29, 2000
    Inventor: Karl Hehl
  • Patent number: 6106271
    Abstract: The invention relates to an arrangement for a two-stage ejector for an injection moulding tool. It comprises a piston cylinder arrangement with piston cylinder elements capable of axial displacement relative to one another in separate stages for the actuation of separately moving ejector plates, having the front plate attached to a piston capable of detachable attachment to a sleeve accommodating said piston via radially moving coupling segments. Internally inside the sleeve, which is attached to the rear plate via a threaded connection, an accommodating body for the coupling segments is fixed to the front plate via radial wings. The wings are capable of movement along the sleeve in matching recesses along the rear part of the sleeve.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: August 22, 2000
    Assignee: Hans Muller
    Inventor: Hans Muller
  • Patent number: 6102560
    Abstract: An extruder screw, includes a head portion having a front end and having formed therein a temperature-control bore and a counterbore extending the bore to the front end for supply and drainage of a fluid. A locking screw has a screw thread, with a first section of the screw thread received in the bore and a second section of the screw thread extending in the counterbore and projecting out of the head portion. The extruder screw further includes a screw tip which threadably engages the second section of the screw thread to close off the extruder screw, and a sealing member which is received in a counterbore of the head portion, wherein the locking screw is so configured as to apply a substantial force against the sealing member when engaging the locking screw into the bore, to thereby effectively seal the bore.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: August 15, 2000
    Assignee: Krauss-Maffei Kunststofftechnik GmbH
    Inventors: Robert Grimm, Stefan Nikolaus
  • Patent number: 6086352
    Abstract: Apparatus for extruding composite products, especially food products such as simulated bacon slabs having components representing meat and fat, respectively, that replicate the random pattern of natural bacon slabs. The apparatus has an extrusion die member which, in some embodiments, is rotatably mounted for manual or motorized movement from one selected position of adjustability to another selected position of adjustability about a substantially circular path of adjustability that is preferably visually indexed to indicate the extent of any positional adjustment of the extrusion die from time-to-time. The apparatus may include a standard sausage stuffing machine for controlling movement of the extrusion die. In all embodiments of the die, it is independent of the apparatus in which it is adapted to be installed so as to be easily removable and replaceable relative to such apparatus, but need not be rotatable.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: July 11, 2000
    Inventor: Archie Rae McFarland
  • Patent number: 6077062
    Abstract: In an extrusion die flow channels supply molten plastic to a pair of distribution grooves constructed in the upstream face of the die component adjacent to the die body. The die body becomes more universal and can be used for a variety of applications by replacing the die component with alternate designs of distribution grooves.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: June 20, 2000
    Assignee: Guill Tool & Engineering Co., Inc.
    Inventors: Arthur Roger Guillemette, James M. Prue
  • Patent number: 6077064
    Abstract: Apparatus includes an injection molding unit and a power source for the unit including at least one hydraulic pump and an electric motor for driving said pump. A concrete mounting base is provided and a steel mounting plate affixed to the concrete mounting plate mounting the power source, with the steel mounting plate including a mounting structure therein mounting said power source. A method is also provided for mounting an injection molding apparatus.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: June 20, 2000
    Assignee: Husky Injection Molding Systems Ltd.
    Inventors: Josef Graetz, John Galt
  • Patent number: 6065950
    Abstract: A system for manufacturing molded articles and simultaneous engineering of mold cavities, comprising a casting device, a machining device and interchangeable cassettes. The casting device comprises a casting mold having two mold halves, each having cassette receptacles and being moveable against each other perpendicular to a separation surface of the casting mold. The casting device also has interchangeable cassettes inserted into the cassette receptacles of the mold halves so that they abut each other and enclose the mold cavity when the casting mold is closed. The cassettes have positive guides on their sides opposite the separation surface that are insertable into the positive guides on the cassette receptacles of the mold halves. The machining device comprises a machining station such as a drill, a turning tool, a milling tool, a grinder and an eroding tool, and also a clamping device within a working range of the machining station.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: May 23, 2000
    Inventor: Armin Spiess
  • Patent number: 6056530
    Abstract: An auxiliary device is intended to be added to an injection moulding device for manufacturing disc-like information carriers. The injection moulding device comprises a mould having two mold parts which in a closed situation bound a mould cavity. An insert plate can be position against an end wall of the mould cavity, on which plate is found the information to be recorded onto the information carrier. Received in a supply holder are insert plates which can be transported by a mechanical device from and to the end wall. Positioning of the insert plates by the mechanical device takes place such that each insert plate is brought into a convex state, is placed with its central zone against the end wall and the convex form is then removed for stable positioning of the insert plate in flat state. The desired centering is thus achieved in simple manner, while friction between the insert plate and the wall is essentially prevented.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: May 2, 2000
    Assignee: Axxicon Moulds Eindhoven B.V.
    Inventor: Petrus Johannes Frederik Joseph Van Hout
  • Patent number: 6056472
    Abstract: A coupling member for interconnecting a hydraulic ejector cylinder, of injection molding equipment, with a mold ejector system to insure that the mold ejector system of the mold is properly activated and returned to its fully retracted position prior to commencing a further injection molding cycle. The coupling member comprises a first elongate stud which is releasably couplable to a second elongate stud to form the coupling member. The first elongate stud has a head, at one end thereof, and the second elongate stud has a stud recessed portion, at a mating end thereof, for at least partially receiving the head. A locking mechanism, carried by the second elongate stud, allows engagement and disengagement of the head from the stud recessed portion, when in a first position, and secures the head at least partially within the stud recessed portion, when in a second position.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: May 2, 2000
    Inventors: Michael Leo Latulippe, Gerard George Normand
  • Patent number: 6053720
    Abstract: A mold for use in a gas-assisted injection molding system includes a gas pin assembly which can be readily removed from one mold half in an open position of a mold wherein a porous insert of the assembly can also be readily removed from the housing of the assembly for easy servicing. The housing of the assembly has an elongated aperture formed therethrough in communication with a gas passageway in the mold to permit the flow of gas therethrough. The porous insert is positioned in the aperture. The insert permits the flow of gas therethrough but prevents the passage of molten plastic therethrough. The assembly also includes a holding device preferably in the form of a set screw which has a gas hole formed completely therethrough to permit the flow of gas therethrough. The set screw is threadedly secured within the housing to hold the insert stationary within the aperture and to permit ready removal of the insert from the housing after the set screw has been removed from the housing.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: April 25, 2000
    Assignee: Larry J. Winget
    Inventors: Larry J. Winget, John F. Murphy
  • Patent number: 6050801
    Abstract: The invention relates to a cross discharge head for extrusion equipment comprising a housing to be mounted on an extruder, which in its interior receives an annular feeding channel encompassing a passage, disposed in the housing and disposed at an angle to the direction of extrusion of the extruder, for the supply of a product to be ensheathed with the extrudate, which receives in its interior a distributor piece, and which at the exit is provided with annular outer shaping tools tapering the stream of extrudate, which are secured on the front face of the housing so as to be exchangeable, wherein the passage at the end side is encompassed by a conical guidance nipple whose outside is simultaneously also the inner shaping tool.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: April 18, 2000
    Assignee: Paul Troester Maschinenfabrik
    Inventor: Dietrich Eckenberg
  • Patent number: 6050805
    Abstract: In heavy extrusion equipment where alignment with downstream equipment is necessary, adjusters 34 are provided for adjusting the position of the extrusion die (14) with respect to the extruder (12). In practice it is possible to provide a die with a split housing one part of which is adjustable with respect to the other, one of the die parts (14) being fixedly connected to the extruder (12), or by providing a two part die, the parts of which are adjustable with respect to each other. The invention may be utilized for alignment of an extrusion die with downstream equipment such as tooling, tooling dies, sizing tables, etc. and also in corrugations for single and double walled pipe.
    Type: Grant
    Filed: April 30, 1995
    Date of Patent: April 18, 2000
    Inventor: Manfred Lupke
  • Patent number: 6045347
    Abstract: An apparatus for the production of plastic compound pipes has a pipe head and half shells completing each other in pairs to form a mold. The pipe head has a supporting ring, which is joined to a connecting piece of an extruder by a first adjusting device. Hereby the width of an injection channel can be modified over its circumference. Between the supporting ring and an external nozzle jacket, a second adjusting device is provided, by which the width of an external channel is adjustable over its circumference.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: April 4, 2000
    Inventor: Ralph Peter Hegler
  • Patent number: 6036469
    Abstract: A quick change system and method of interchanging molds on plastic extrusion blow molding machines is disclosed wherein a universal standard subplate is provided for use with different blow molding machines on which a variety of different mold units are removably mounted on the standard subplate with the subplate establishing a preselected precisely aligned relation automatically between the mold unit and a machine platen. A quick release locking device is provided between each mold unit and a unitary standard water manifold and detabber assembly. The unitary standard assembly is provided as a one-piece component with fluid connections communicating respectively with water and air supply sources of the water manifold and detabber and which are conveniently maintained attached without being disconnected during detachment of the unitary standard assembly from the mold unit during a mold change.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: March 14, 2000
    Assignee: Heise Industries, Inc.
    Inventors: John Wade Allen, Brooks B. Heise, Jr.
  • Patent number: 6033204
    Abstract: A flat blow molding machine adapted to extrude flat hollow parison from clearance between a flat core and a flat die surrounding the core, characterized in that both ends of the die are slidable in a width direction with respect to a center, the core is replaceable in accordance with expansion and contraction of the die in the width direction. According to this construction, it is possible to change the width of the flat hollow parison extruded from the clearance between the core and the die by sliding the both ends of the die in the width direction and replacing the core upon expansion and contraction of the core in the width direction. Further, if the flat core is constructed from a planar replaceable portion and curved (three dimensional) non-replaceable portions and only the planar replaceable portion is exchanged upon replacement, preparing a plurality of inexpensive-to-manufacture planar replaceable portions having different lengths is enough and the cost is reduced.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: March 7, 2000
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Akira Iwawaki, Satoshi Araki, Yoshiharu Shitara, Yoshinori Umezawa, Takashi Shimizu
  • Patent number: 6027325
    Abstract: A mandrel assembly for use in shaping and injection molds, the assembly includes a support having compressed air channels, and a mandrel extending upwardly from the support and having spaced-apart ramps extending radially outwardly therefrom. A cap slidingly fits over the mandrel and has a free end positioned over the compressed air channels of the support. The cap also has an inner groove loosely receiving the ramps of the mandrel such that the cap is secured to the mandrel yet is able to slide up and down on the mandrel such that the free end of the cap will cover and uncover the channels. According to another embodiment of the present invention, the mandrel has an outer groove, and a plurality of balls are received in the outer groove. The cap has an inner groove corresponding to the outer groove that loosely receives the balls such that the cap is secured to the mandrel yet is able to slide up and down on the mandrel such that the free end of the cap will cover and uncover the channels.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: February 22, 2000
    Inventor: Tadeusz W. Piotrowski
  • Patent number: 6019587
    Abstract: A stamper plate attaching/detaching device of an injection mold for forming an optical disc substrate wherein a stamper plate is supported in a cavity which is formed by a cavity side disc cavity plate, a movable disc cavity plate, and a cavity ring. The stamper plate attaching/detaching device is equipped with a section for holding the outer circumferential rim of the stamper plate by means of the inner circumferential rim of the cavity ring, which inner circumferential rim is larger than the outer diameter of the stamper plate. A plurality of pairs of permanent magnets, which have magnetic poles in parallel with respect to a central line are buried, with phase differences, on the same radial line of the cavity side disc cavity plate and the movable disc cavity plate. The cavity ring rotates between a first angle position and a second angle position in relation to the cavity side disc cavity plate and the movable disc cavity plate.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: February 1, 2000
    Assignee: Seikoh Giken Co., Ltd.
    Inventors: Mitsuo Takahashi, Katsuyuki Yasuda
  • Patent number: 6015226
    Abstract: In a screw-type extrusion machine comprising a composite casing which comprises casing sections fitted together in a longitudinal direction, the casing sections being tightly tautened relative to each other by a plurality of tie rods which extend parallel to each other in the longitudinal direction of the casing on the outside thereof, it is provided with a view to avoiding any over-stressing of the tie rods in the hot condition and to avoiding any leakage between the casing sections in the case of low temperatures and non-uniform temperature distribution, that the tie rods are loaded in the longitudinal direction by a pre-stressed spring system.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: January 18, 2000
    Assignee: Krupp Werner & Pfleiderer GmbH
    Inventors: Ulrich Weller, Rainer Sauter
  • Patent number: 6010625
    Abstract: A continuous flow filter changer for a fluid having a filter carrier assembly for intermittent sliding transition displacements in a filter channel to align adjacent filters thereon successively with a filter aperture in the flow passage. The duration of each such transition is substantially less than that between transitions. A ring shaped seal sealingly connects between the flow passage upstream thereof and a filter aligned with said aperture to prevent fluid flow except through said filter. The clearance for sliding between the filter carrier assembly and the filter channel is controlled to allow for such displacements while limiting the fluid leakage from the filter channel during a single transition to a predetermined level.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: January 4, 2000
    Assignee: Beringer LLC
    Inventor: Timothy W. Whitman
  • Patent number: 6010324
    Abstract: A mold clamping unit comprises guide rollers for guiding fitting and releasing of a mold, a hydraulic clamp for holding the mold at a molding position, a guiding portion formed to project in a direction perpendicular to a mold open-close direction from a lower portion of platen and a locking mechanism provided to an upper portion opposing to the guiding portion for the platen, for locking the mold at a releasing position. Since exchange and maintenance operations of a stamper can be carried out under a condition where the mold is released to the releasing position over the guiding portion and locked by the locking mechanism, fitting/releasing of the mold to/from the platen can be facilitated and exchange and maintenance operations of the stamper can be made easy.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: January 4, 2000
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Takeo Oshiro, Masao Hirosawa, Hideo Ichikawa
  • Patent number: 6007316
    Abstract: A method of and an apparatus for molding resin to seal electronic parts are adapted to use molding units to seal with molded resin materials electronic parts that are mounted on lead frames. Additional molding units are detachably mounted with respect to an already provided first molding unit in the molding apparatus, so that the number of the molding units can be arbitrarily adjusted. In this manner, the method and apparatus can be easily reconfigured or rearranged to be adapted to mass production or small production runs of the same or different types of molded parts. By simultaneously carrying out various process steps, the overall process time is reduced.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 28, 1999
    Assignee: Towa Corporation
    Inventor: Kazuhiko Bandoh
  • Patent number: 6000926
    Abstract: A coextrusion die includes a plurality of annular cells stacked on top of each other. Each annular cell includes a plurality of openings aligned with openings in the adjacent cell, thus forming multiple streams. Plastic melt may be supplied to the die coplanarly. Stacks of annular disks may be joined to form the annular cells through which plastic melt can be axially directed.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 14, 1999
    Inventor: Henry G. Schirmer
  • Patent number: 5997272
    Abstract: A die for the preparation of a toner resin in an extruder having a housing defining a housing aperture therein and a conveyor for conveying the resin through the housing aperture to form a stream of resin is provided. The die includes a member connected to a first end of the housing. The member defines an opening therethrough. The cross sectional area of the opening is progressively reduced in the direction of the stream of resin for at least a substantial portion of the opening.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: December 7, 1999
    Assignee: Xerox Corporation
    Inventors: Joseph L. Leonardo, J. Stephen Kittelberger, John J. Ianni, Fraser S. Smith, Fumii Higuchi
  • Patent number: 5968560
    Abstract: The invention concerns a device for producing thermoplastic containers, in particular bottles, by the blow-molding or stretch blow-molding of a preheated preform. The device comprises at least one mould consisting of two half-molds (2) each supported by a mould carrier, the two mould carriers being movable relative to each other. Each half-mould (2) comprises a shell holder (9), supported by the respective mould carrier, and a shell (7) which is equipped with a half-impression (8) of the container to be obtained and can be rendered integral in a detachable manner with its shell holder (9) by rapid-fastening means (19-23). The shell (7) and the shell holder (9) are of complementary shapes such that they contact each other at least partially for heat conduction purposes whilst the pipes and connections for circulating and/or heating fluids are provided in the shell holder alone.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: October 19, 1999
    Assignee: Sidel
    Inventors: Dominique Briere, Leon Coisy, Paul La Barre, Pascal Santais
  • Patent number: 5964945
    Abstract: A novel die holder member for use in co-extrusion cross-head die apparatus for applying two coating materials in inner and outer layers to an electrical wire, or the like. A body member has a through, axial bore in which a tip and die members, with respective tip and die holders, are positioned. A pair of radial bores, with which sources of two flowable coating materials communicate, extend from the exterior of the body member to the axial bore. The first coating material flows forwardly of the apparatus through a first flow passage, the second coating material flows rearwardly through a second flow passage, and the two materials flow forwardly, in superposed relation, through a third flow passage from a confluence of the first and second passages to an orifice in the die member where they are deposited in uniform, inner and outer layers, on the wire. The die holder member of the invention has frustoconical external and internal surfaces with a first, annular groove extending to and 360.degree.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: October 12, 1999
    Inventor: James A. Milliman
  • Patent number: 5948448
    Abstract: An apparatus for controlling plastic melt flow in an injection molding machine comprising: a thermally conductive housing having a fluid flow channel sealably disposed in the housing, the channel having an input end sealably connected to a source of flow of a plastic melt material and an output end for controllably delivering the flow of plastic material to an input aperture of a mold cavity; an elongated pin disposed within at least a portion of the channel for controlling output of the flow of plastic melt through the output end of the channel, the pin having a head end and a pin end and a length extending between the head end and the pin end; the pin being slidably mounted along its length through an aperture in the housing such that the pin is slidably movable through the aperture between at least one unrestricted flow position and at least one restricted flow position; the head end of the pin extending outside the housing and being readily connectable to and disconnectable from a pin reciprocating mechan
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: September 7, 1999
    Assignee: Eurotool, Inc.
    Inventor: Harald Schmidt
  • Patent number: 5916603
    Abstract: A mold base kit including plural plates having alignment bores for receiving guide dowels for accurately aligning the plates with respect to one another as a mold frame is assembled from the kit. Each guide dowel includes a hollow, cylindrical sleeve sized to fit snugly in the alignment bores of adjacent, abutting plates and also includes an abutment member extending radially outwardly of the guide dowel sleeve intermediate its ends which prevents the guide dowel from moving a substantial distance along an alignment bore. The abutment member may be formed by a circular piece of spring wire which extends through an arc of more than 180.degree. around the outside of the dowel sleeve, and preferably approximately 270.degree. around the sleeve. Because the retainer clip extends less than completely around the sleeve, its ends can readily be spread apart for assembly of the retainer clip onto the sleeve.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: June 29, 1999
    Assignee: Pleasant Precision, Inc.
    Inventors: Ronald E. Pleasant, Mark A. Morris
  • Patent number: 5911933
    Abstract: A tubular profile made of thermoplastic material is formed by extrusion from an extruder. Downstream from the extruder, the tubular profile is cooled both externally and internally by an external cooling unit and an internal cooling unit mounted on the extruder. A tensile force is exerted on the cooled tubular profile downstream from the cooling units by a pulling device. When the extruder is set in operation to start the production of the tubular profile, the internal cooling unit is left out. When the pulling device applies the tensile force on the extruded and externally cooled tubular profile, the internal cooling unit is introduced into the tubular profile from the open end of the tubular profile and is mounted on the extruder.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: June 15, 1999
    Assignee: Wavin B.V.
    Inventors: Jan Hendrik Prenger, Jan Visscher
  • Patent number: 5908642
    Abstract: The extrusion head for plastics extruders includes a die head, which is disposed axially in the extrusion direction downstream from a jaw plate. The die head is divided in an at least approximately radial direction into a main part and an orifice part and the cones of the orifice part can be fixed independently of one another at the respectively adjacent cones of the main part and exchanged for other cones in a rapid operation.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: June 1, 1999
    Assignee: Machinefabriek "De Rollepaal" b.v.
    Inventors: Hendrik Willem Veen, Dirk Mulder
  • Patent number: 5908595
    Abstract: This invention concerns a device used in the process of manufacturing an automobile pane 1 equipped with a polymer frame 52 placed on the edge of the pane 1. The frame 52 is extruded onto the pane 1 which can be moved by means of a suitable support in such a way that the edge of the pane travels through a recess in an extrusion head 25 and 40. The recess of the extrusion head 40 preferably includes a U-shaped jaw 41 straddling the edge of the pane. At the front extremity of the two half-jaws of the U-shaped jaw 41 there are disposed sealing ledges or shoes 42 and 43 which are movable perpendicularly to the surfaces of the pane and which, during extrusion, bear upon the surfaces of the pane. Alternatively, the extrusion head can include a fixed jaw where the sealing ledges or shoes slideably and sealingly contact the plate.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: June 1, 1999
    Assignee: Saint-Gobain Vitrage
    Inventors: Gerd Cornils, Herbert Joeris, Rolf Kotte, Heinz Scholl
  • Patent number: 5908643
    Abstract: An injection mold for forming a pattern for use in investment casting having mold sections carrying two pattern-forming surfaces and a translatable third pattern-forming element movable on a mold section. The mold also includes an inner core. Parting lines are located at inconspicuous locations by sizing and shaping the mold sections. The method of use of the injection mold includes employing an arrangement for facilitating lower mold section and for raising the inner core to facilitate its removal.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: June 1, 1999
    Assignee: Sturm, Ruger & Company, Inc.
    Inventors: Thomas E. Yost, Paul N. Latulippe, Jr.
  • Patent number: 5902512
    Abstract: A mold insert for transferring selectable reference indicia to a molded part is used for tracking various production parameters for a manufactured component. The mold insert contains a plurality of tapered concentric rings, each tapered concentric rings having a face surface containing various transferable reference indicia. A housing having a bore accommodates the plurality of tapered concentric rings and permits rotatable adjustment of the tapered concentric rings relative to a reference indicator. A releasable fastener connected with respect to a tapered core within the tapered concentric rings is used for adjusting and fixing a position of each one of the plurality of tapered concentric rings with respect to one another and the reference indicator.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: May 11, 1999
    Inventor: Kenneth F. Streit
  • Patent number: 5888554
    Abstract: A device for cooling and granulating strands of plastic which emerge in molten form from dies (3) before being fed, either directly or via a chute (22) which can be positioned underneath the dies and has a cooling water supply, to a subsequent flow channel (1) which has at least one device for producing a stream of coolant. From the flow channel (1) the strands (4) are fed into a granulator (16) which is provided with at least one blade system comprising a rotating shearing blade (13) and a counterblade (12) and used for granulating the strands (4). The device is without a pair of feed rollers as an assembly belonging to the granulator (16) but has a pair of draw-off rollers (20, 21) at the end region of the flow channel (1).
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: March 30, 1999
    Assignee: C.F. Scheer & Cie GmbH & Co.
    Inventors: Ludwig Zollitsch, Ulrich Kreuz
  • Patent number: 5888557
    Abstract: An apparatus for evenly distributing forces around a die mounted to an extruder barrel includes a barrel flange mounted around the extruder barrel, the barrel flange providing a flange sealing face and a first angular cam surface, and a die adapter for carrying the die, the die adapter providing an adapter sealing face that opposes the flange sealing face, and a second angular cam surface. The apparatus further includes a pair of opposed clamshells each with a semi-circle opening and a lock channel facing each other, each lock channel having angled cam surfaces facing the first and second angular cam surfaces.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: March 30, 1999
    Assignee: Akron Extruders, Inc.
    Inventor: Kurt G. Houk
  • Patent number: 5882695
    Abstract: A guiding mechanism and method are provided for properly aligning molds or portions thereof, such as ejector plates, as they are cycled. The guiding mechanism is an improvement over conventional bushings which require that the mold in which the bushings are mounted to be removed from the press and disassembled and thereafter, the press fitted bushings are pressed out. Herein, the bushings are provided with a replaceable insert or portion that is easily disconnected from the remainder of the bushing such as by unthreading a threaded insert from a threaded bushing body without removing the mold half from the press. A first replaceable insert can be mounted in the bushing body which is sized to receive the leader pin to guide the leader pins therein and align the mold halves as they are moved to the closed position.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: March 16, 1999
    Assignee: D & L Incorporated
    Inventor: Glenn Starkey
  • Patent number: 5876765
    Abstract: A device for encapsulating a plurality of semiconductor die comprises a form having first and second halves such that as the first half contacts the second half the first and second halves have a plurality of cavities therein. The first and second halves each comprise a conduit therein for receiving a heated liquid. The device further comprises a runner block having a hole therein, a separate runner for each cavity, and a conduit therein for receiving a heated liquid. The runners have a rectangular cross section and a width to height ratio of at least 3:1. The device further comprises a mounting plate for mating with the runner block. The mounting plate comprises a concave recess and a hole in the mounting plate at the recess. The hole in the mounting plate passes through the mounting plate to align with the hole in the runner block such that an encapsulation material can be passed between the mounting plate and the runner block.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: March 2, 1999
    Assignee: Micron Technology, Inc.
    Inventor: Gerhard Hinterlechner
  • Patent number: 5861181
    Abstract: A frame for a die casting machine, including a first side, a second side, a toggle endpiece and a die endpiece opposite the toggle endpiece, one of the first and second sides having an upper frame member with a die end and a toggle end, the die end being releasably secured to the die endpiece, and a lower frame member integrally joined to the die endpiece and the toggle endpiece, the other of the first and second sides having upper and lower frame members integrally joined to the die and toggle endpieces.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: January 19, 1999
    Assignee: Outboard Marine Corporation
    Inventors: Joseph L. Thomas, Robert T. Wolniak
  • Patent number: 5858417
    Abstract: A resin injector is used to fill recesses created in plaster moulds containing teeth in the interior of muffles with resin, with a simple economic mechanical device which is attached to the muffle and is operated by a conventional press. An assembly of two cylindrical part (4,8) is adjusted to a wide inlet mouth cut in the muffle. The resin which is received in this assembly is projected towards the muffle through at least one hole, which can be opened or closed at will by means of a manually operated part.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: January 12, 1999
    Inventor: Max Bosshart