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| Number | Title | Issue Date |
| 7909500 | Mixing and kneading machine and method of implementing continual compounding A mixing and kneading machine (1) for continual compounding comprises a screw shaft (3) rotating in a casing 2 and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thrupu... | 03/22/2011 |
| 7901127 | Drive for a machine for synthetic material plasticization and injection The drive device (1) is intended for a machine for the plasticization and injection of synthetic material. It comprises a main drive (2) drivable in a first and a second direction of rotation and having a hollow shaft (6) rotatable about an axis... | 03/08/2011 |
| 7837378 | Mixer-extruder assembly A mixer-extruder assembly may include a hollow cylindrical chamber and a hopper connected to the chamber. A piston drive shaft having a piston attached at one end may be rotatable about a drive shaft axis that is coaxial with the cylindrical chamber. The piston may ... | 11/23/2010 |
| 7632006 | Device for proceeding material by mixing and/or plasticization or agglomeration providing periodic enlargement or reduction to gap between screw channels A device for processing material by mixing and/or plasticization or agglomeration has a screw housing, in which at least two screws are situated adjacent to one another. The screw channels are engaged with one another. The screws are driven to rotate by at least one... | 12/15/2009 |
| 7320561 | System and method for handling bulk materials A bulk material handling system generally consisting of means for holding the material; means for conveying the material including a first conduit formed of a permeable material having an inlet communicating with an outlet of the material holding means and an outlet... | 01/22/2008 |
| 7316553 | Drive assembly for rotating and translating a shaft A drive assembly for rotating and translating a shaft comprising a hollow shaft motor and a fluid cylinder. The hollow shaft motor rotates the shaft and the fluid cylinder moves the shaft lengthwise. The drive is particularly useful in the injection unit of an injec... | 01/08/2008 |
| 7270536 | Screw tip and molding system apparatus A screw tip for use in a molding system apparatus is disclosed. The screw tip includes a connection section and screw tip head section. The screw tip head houses an entry port, or entry ports, an accumulation chamber, and a check valve chamber. A check valve is prov... | 09/18/2007 |
| 7252500 | Check valve assembly for injection molding apparatus An injection molding apparatus which includes a check valve assembly mounted at the forward end of a feed-screw, the valve assembly having forward and rearward valve seat surfaces which co-act in a first position to allow a plasticized polymeric material to enter an... | 08/07/2007 |
| 7235198 | Metering method and control apparatus for injection molding machine When a metering process is started, a screw rotates at a preset rotating speed, thereby carrying out back pressure control to keep the pressure of a resin at a preset pressure, and retreats. When the screw is located near a preset metering completion position, the c... | 06/26/2007 |
| 7230037 | Method for mixing a polyol component and an isocyanate component The present invention relates to a method for the continuous mixing of at least one polyol component and at least one isocyanate component and optionally additives to form a polyurethane reaction mixture in a stirrer mixer with an axially conveying stirrer. ... | 06/12/2007 |
| 7172333 | Injection molding screw An injection molding screw for metal injection molding includes a first end, a second end, a longitudinal body with a first stage and a second stage extending axially along a length of the screw between the ends, a pressure retention device, and optionally, a screw ... | 02/06/2007 |
| 7144150 | Rinseable splash shield and method of use The present application describes a method for rinsing a splash shield. According to the disclosed method, a vessel containing contents to be mixed is positioned in a mixing machine, and a splash shield is positioned over the opening of the vessel. After the materia... | 12/05/2006 |
| 7137759 | System and method for handling bulk materials A bulk material handling system generally consisting of means for holding the material; means for conveying the material including a first conduit formed of a permeable material having an inlet communicating with an outlet of the material holding means and an outlet... | 11/21/2006 |
| 7104775 | Injection unit having rotatable device for preventing reverse flow Disclosed is an injection unit having a rotatable device for preventing reverse flow. To connect first flow channels formed in a spacer and second flow channels formed in a screw head when the metering is performed, and prevent reverse flow of resin by cutting off t... | 09/12/2006 |
| 7097443 | Extruder transition section A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are co... | 08/29/2006 |
| 7090483 | Direct-driven extruder and process for operating the same An extruder which converts preferably granular plastic material into the melted state and which includes an extruder screw rotating within a cylinder and connected to a drive unit having a motor and at least one rotor so that the drive unit provides torque for rotar... | 08/15/2006 |
| 7014353 | Plasticating screw and apparatus A rotatable screw for moving material in a plasticating process along an axis through a conduit from an inlet to an outlet. The screw having a feed section, barrier melting section, reorientation section and metering section disposed sequentially downstream. The scr... | 03/21/2006 |
| 7008202 | Method and apparatus for forming thermoplastic resin foam The present invention relates to the step of plasticizing a thermoplastic resin material by rotatably driving a screw (20). Also included in the method is the step of injecting an inert gas into a screw cylinder (1) to permeate the melted resin and inj... | 03/07/2006 |
| 6997596 | Plastic extruder screw tip A plastic extruder screw tip having a conical inwardly and forwardly tapering melt converging surface; having first and second dashers fixedly attached to and extending laterally outwardly from the melt converging surface, the dashers being opposingly arranged and h... | 02/14/2006 |
| 6989120 | Heat-vulcanizable silicone compositions from premix A continuous process of preparing a heat-vulcanizable filled silicone composition, comprises mixing filler and high viscosity silicone polymer continuously in a first co-rotating intermeshing twin screw extruder; and compounding a filler and silicone polymer mixture... | 01/24/2006 |
| 6969247 | Injection molding unit with a device for mixing and metering plastic melt and additives An injection unit for an injection molding machine includes an injection device in the form of a plunger/screw, which is driven axially and rotationally in a housing, and a device intended for mixing and metering plastic melt and including an inlet for introduction ... | 11/29/2005 |
| 6957953 | Reservoir reducing screw tip An extruder for extruding extrudate is provided and includes a generally cylindrical barrel portion having an end face. A screw conveyor is rotatably arranged coaxially within the barrel portion and has a downstream end. The screw conveyor has helical flights that d... | 10/25/2005 |
| 6921190 | Injector with improved small shot metering An injection screw and barrel for small injection molding shots employs separate plunger and flight sections so that the plunger section may be arbitrarily reduced in diameter without adversely affecting the threaded portion of the flight section. Melt passes from t... | 07/26/2005 |
| 6916169 | Drive apparatus for injection molding machine A drive apparatus for an injection molding machine comprises a drive means, a rotation transmission shaft, a screw shaft, a nut and a driven member. The rotation transmission shaft is connected to the drive means and rotated by the drive means. The screw shaft is re... | 07/12/2005 |
| 6893151 | Device for conveying elastomeric media, use of the device, as well as two operating methods A system for delivering elastomeric media comprises a gear pump and a screw-type extruder which, viewed in the delivery direction of the pumping medium, is arranged in front of the gear pump and which comprises a screw and a screw casing. The screw casing has at lea... | 05/17/2005 |
| 6755564 | Extruder temperature controller with stable temperature reset The invention is an extruder temperature controller for an extruder barrel. The extruder temperature controller includes means for determining an actual screw speed and has means for storing a plurality of screw speeds. Each member of the plurality of stored screw s... | 06/29/2004 |
| 6627134 | Apparatus for molding multilayered articles An apparatus for injection molding two compatible polymeric materials, in which two substantially coaxial extrusion screws are used to plasticize the two materials into a common accumulation space. The charge comprising multiple layers of material is then... | 09/30/2003 |
| 6533447 | Plasticizing apparatus for a pre-plasticization-type injection molding machine A plasticizing apparatus used for a pre-plasticization-type injection molding machine is equipped with a screw drive section which comprises a rotational drive section supported in an axially moveable manner and adapted to rotate the screw; and an advance... | 03/18/2003 |
| 6454454 | Polymer melting and extruding apparatus with linear downstream threads An extruder screw mechanism has a barrel that is heated by heating coils, an internal screw, and a cylindrical melt sleeve having a plurality of circumferentially spaced, axially extending, radial slots there through located between the external barrel an... | 09/24/2002 |
| 6414054 | Continuous preparation of heat-vulcanizable silicone compositions High levels of treated fumed silica, processing fluid and high molecular weight silicone polymer are continuously compounded into a homogeneous silica filled heat-vulcanizable silicone composition by forming a premix in a continuous annular layer mixer an... | 07/02/2002 |
| 6345976 | Injection apparatus There is provided an injection apparatus comprised of a heating cylinder which is closed by a front end member having a nozzle. The apparatus is further comprised of a plasticating screw in the heating cylinder in a freely rotating and reciprocating manne... | 02/12/2002 |
| 6340439 | Depressurization method in plasticization and metering process for a motor-driven injection molding machine A motor-driven injection molding machine comprises an injection device which includes a heating cylinder for heating resin powder therein to melt the resin powder into molten resin and a screw disposed in the heading cylinder for feeding the molten resin ... | 01/22/2002 |
| 6284170 | Method for controlling drive of screw in injection molding machine The present invention is applicable to an injection molding machine comprising an injection device having a servo motor for use in rotating a screw and a controller for controlling the servo motor. The controller has a rotation speed N previously set ther... | 09/04/2001 |
| 6270247 | Mixing and kneading apparatus A mixing and kneading device comprises a mixing and kneading shaft mounted in a housing and driven to a rotating as well as to a reciprocating movement. For sealing the housing, there is provided a sealing assembly located between the housing and the mixi... | 08/07/2001 |
| 6254266 | Floating ring mixer for extruder An extruder-mixer has a plurality of rotor rings provided on the downstream end of a motor driven extruder shaft mounted for rotation in a conventional heated barrel or stator. The rings comprise a plurality of spaced driven rotor rings spaced apart from ... | 07/03/2001 |
| 6228308 | Screw and apparatus for plasticizing fiber-reinforced thermoplastic resins, and method and product of molding the resins A screw adapted for plasticizing a fiber-reinforced thermoplastic resin wherein screw lead (distance of the resin advancement in the direction of the axis per 1 revolution of the screw when it is postulated that the screw channel is 100% filled with the r... | 05/08/2001 |
| 6210030 | Method and apparatus to control viscosity of molten plastics prior to a molding operation An apparatus and method for continuously reducing the viscosity of molten moldable polymeric material uses shear vibration under extensional flow to cause disentanglement. One or more station treatment cavities are defined by a gap composed of two closely... | 04/03/2001 |
| 6206558 | Extrusion system An extrusion system is provided with a screen changer between in-line screw sections. An in-line seal diverts high pressure, high temperature foamable material toward the screen changer. The seal may have reverse flights to provide a visco-dynamic seal. T... | 03/27/2001 |
| 6203747 | Resonating injection molding machine and process for its operation An injection molding machine includes an injection molding cylinder with a material supply at one end and an injection nozzle at the other end and a material conveyance unit attached to a drive and movable in the injection molding cylinder. The injection ... | 03/20/2001 |
| 6155817 | Injection-moulding unit for a machine for the injection moulding of plastics An injection molding unit is provided with a carrier block and an injection bridge, movable towards and away from the carrier block for a relative movement of a feeding means relative to a receiving body. An injection motor drives a plurality of spindle d... | 12/05/2000 |
