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| Number | Title | Issue Date |
| 8168111 | Injection moulding method An injection molding method in which plastic material under pressure is injected from a storage chamber with a closable outlet into a mold cavity and fills same under pressure, wherein the volume of the storage chamber and the pressure obtaining therein upon opening... | 05/01/2012 |
| 7347965 | Apparatus and method for injection molding An apparatus for injection molding comprises an injection unit comprising a plunger, the plunger being translated with accumulation of plasticized material in preparation for injection and being advanced to inject the accumulated plasticized material into mold cavit... | 03/25/2008 |
| 7299544 | Apparatus for separating cull of semiconductor package molding system Disclosed is an apparatus for separating culls coupled to a lead frame when a semiconductor chip is molded. The apparatus includes a lower plate, on which culls coupled to a lead frame are placed, an upper plate pressing culls placed on the lower plate in order to s... | 11/27/2007 |
| 7291304 | Coinjection molding cooled shooting pot cylinder Coinjection molding shooting pot cooling apparatus and method are configured to cool a shooting pot cylinder which, in combination with a shooting pot piston, injects a melt through a coinjection nozzle having at least two melt channels ending at the same gate. Pref... | 11/06/2007 |
| 7229584 | Method and apparatus for injection molding multi-component mixtures In a method and apparatus for injection molding a multi-component mixture, in particular liquid silicone rubber; a starting material, containing at least two components and, optionally, at least one additive, is conveyed from a storage and metering assembly through ... | 06/12/2007 |
| 7192268 | Metering device for a nozzle of a hot runner injection molding apparatus An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is l... | 03/20/2007 |
| 7040887 | Closable nozzle body A closing element, which has an open position and a closed position and is actuated by an actuating element, is arranged in the nozzle channel of a nozzle body. In the closing position, the closing element separates a region that is at least temporarily in open comm... | 05/09/2006 |
| 6911266 | Blow-molded articles with decorative finish A blow-molded decorative article is disclosed which comprises a plurality of different polymers having different melt flow rates that cause inter-dispersion of the polymers upon blow-molding. The article is blow-molded from a multiple layer parison that a plurality ... | 06/28/2005 |
| 6884061 | Metering device for a nozzle of an injection molding apparatus An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is l... | 04/26/2005 |
| 6866809 | Production of moulded articles and apparatus for producing moulded articles Moulding apparatus is disclosed which comprises transfer element (12) which has a holding cavity (14) therein for receiving a charge of mouldable material. Mouldable material in particulate or molten form is fed into a heated passage (30) by a f... | 03/15/2005 |
| 6733704 | Thermoplastic resin injection molding machine An injection molding machine includes a plasticating unit for plasticating a thermoplastic resin, and an injecting unit connected to the plasticating unit through a connecting passage to inject the plasticated resin into a mold. The injecting unit A includes a rotar... | 05/11/2004 |
| 6699422 | Shaping method for producing plastic parts and device for carrying out said method The invention relates to compression injection plastic molding using a repository space, for the temporary storage of the molding material melt to prevent structural faults and reduce workpiece costs. The molten molding material is first fed into the repo... | 03/02/2004 |
| 6649094 | Method of purging shooting pot and providing enhanced purge capability Methods for enhanced purging of an injection molding shooting pot assembly are provided. Old melt is purged from a shooting pot having an injection plunger slidably received in an injection cylinder. The plunger is moved by a powered piston, which moves t... | 11/18/2003 |
| 6645405 | Weighing method in prepla type injection molding machine An unstable weighing due to the plunger sliding resistance in a prepla type injection molding machine is prevented by dividing control of the plunger retraction movement for the weighing into speed control and pressure control. A plastic resin supply star... | 11/11/2003 |
| 6630085 | Method for the multicomponent injection molding of plastic parts A method for the multi-component injection molding of plastic parts, in which at least two different plastic components are injected into an injection molding tool to form a plastic part, the method comprising the following steps: a) introducing a first p... | 10/07/2003 |
| 6602438 | Structure for polymeric thermistor and method of making the same A structure for polymeric thermistor device and method of making the same are disclosed. The polymeric thermistor makes use of a polymeric composite filled with conductive filler and show resistance variations at different temperatures. A polymeric substr... | 08/05/2003 |
| 6576179 | Injection molding process using a pair of reservoirs and an injection device An injection-molding process including kneading functional particles with a binder resin in a kneader, temporarily storing the kneaded material supplied from the kneader in a reservoir device and feeding the kneaded material stored in the reservoir device... | 06/10/2003 |
| 6471904 | Method for electrically operated plastics injection A two-stage, electrically-powered injection unit for an injection molding machine includes an extruder for plasticating material, and a separate melt accumulator to receive the plasticated material. The accumulator includes an injection plunger that is sl... | 10/29/2002 |
| 6468464 | Method and apparatus for injection molding parts The invention relates to a method and an apparatus for injection molding parts, which comprises a mixture of at least one plastic material and at least one additive in the form of fibrous or powdered fillers or reinforcement materials. The method comprise... | 10/22/2002 |
| 6464910 | Injection moulding of large plastic components A system for injection moulding of large plastics components in a single shot comprises an extruder and an accumulator fed from the extruder The accumulator leads into the mould (14) via a mould valve (12) opive, when closed, to close the mould cavity sub... | 10/15/2002 |
| 6403010 | Method for injecting plastic material A method for injecting plastic material or another injectable material into an injection molding tool comprises the following steps: plasticizing the plastic or other injectable material in a plasticizing apparatus (2); transporting the plasticized plasti... | 06/11/2002 |
| 6254813 | Method and apparatus for injection molding plastic objects comprised of at least two different materials An apparatus and method provides that before, during, and/or after the plastic objects have been injection molded, a portion of the first plastic component, the second material, and/or a mixture of the two components is conveyed to at least one storage el... | 07/03/2001 |
| 6241932 | Method and system for reducing polymer degradation products in two stage injection molding machines A method and system of operating a two stage injection molding machine wherein movement of the injection plunger in the shooting pot is coordinated with movement of the plasticizing screw and melt flow into the shooting pot such that the plunger provides ... | 06/05/2001 |
| 6235229 | Coinjection molding or multi-layered articles A multi-cavity coinjection mold having a relatively large plurality of cavities for simultaneously molding a relatively large plurality of multi-layered articles including a) a plurality of cavity groups each defining a relatively small plurality of said ... | 05/22/2001 |
| 6214277 | Method for producing plastic composite molded parts Plastic composite gears and bearings with excellent friction and wear properties and further, plastic composite molded parts with excellent dimensional accuracy, can be presented at a low cost without adding large quantities of solid lubricant and glass f... | 04/10/2001 |
| 6109909 | Pre-plasticizing injection apparatus having a plurality of heating and injecting cylinders and injection molding method of using the same A pre-plasticizing injection apparatus operated with a mold clamped by a mold clamping device comprises: a screw device movable toward and away from the mold clamping device and including a heat-plasticizing cylinder having a bore and a screw which rotata... | 08/29/2000 |
| 6071462 | Compounding injection molding combined process A process is disclosed for recycling plastic materials. The previously sorted plastic material wastes are comminuted, mixed, melted and homogenized during a first step, and the raw materials thus recovered are immediately stocked in a storage chamber (12)... | 06/06/2000 |
| 6001272 | Method for producing rare earth bond magnet, composition for rare earth bond magnet, and rare earth bond magnet A method of the invention for manufacturing a rare earth bonded magnet has the steps of mixing a rare earth magnet powder, binder resin and an additive at a predetermined ratio, kneading the mixture at a temperature not lower than the thermal deformation ... | 12/14/1999 |
| 5985201 | Method of injection molding a suspension of particles A method for injection molding a material consisting of a suspension of particles. The suspension of particles moves through convergent passages in an obturator and an injection channel so that the particles remain in suspension. The press has a head in w... | 11/16/1999 |
| 5968429 | Apparatus and method for molding of polyester articles directly from a melt The present invention relates to an apparatus and method for producing molded polyester articles. More particularly, the invention concerns an apparatus and method for continuously producing molded polyester articles having low acetaldehyde content from a... | 10/19/1999 |
| 5925295 | Pre-plasticizing type injection molding machine and control method therefor A pre-plasticizing type injection molding machine includes a plasticizing device for plasticizing a molding material supplied from a hopper by a first screw disposed within a first barrel, an injection device 8 for measuring a molten resin supplied from t... | 07/20/1999 |
| 5833899 | Method for the preparation of method articles by single and multi-layer compression and apparatus therefor One or several molten materials are extruded at low pressure from one or several continuous plasticizers through central stationary nozzles via individually circumferential flow passages of common distribution spools directly into individual extendable tr... | 11/10/1998 |
| 5804230 | Injection molding machine An injection molding machine for thermoplastic resin consisting of an accumulator in which a plunger is slidably provided and an injection mold, the sprue of which connects with the nozzle of said accumulator, wherein said plunger consists of a cylinder a... | 09/08/1998 |
| 5795509 | Injection method of preplasticization injection molding machine Molten resin, plasticized in the plasticization chamber, is fed to the injection chamber through a connection passage where it is measured. Before it is injected by the plunger, the connection passage is blocked and the molten resin is preliminarily compr... | 08/18/1998 |
| 5770245 | Preplasticizing injection machine There is provided a preplasticizing injection machine including a resin vent formed in the injection cylinder behind the plunger stroke wherein said resin vent is connected to a pressure reducing device and/or an inert gas feeding machine. The resin entra... | 06/23/1998 |
| 5595799 | Coinjection molding of decorative preforms and containers produced from such preforms A process for injection molding a multi-colored article in an injection mold, in which a) a desired initial quantity of a first-colored material is metered to a first desired portion of the cavity; b) a desired quantity of a second-colored material is sup... | 01/21/1997 |
| 5543092 | Method for exerting stress tensor to molding material A method is disclosed for exerting a stress tensor on moldable material in a mold cavity. The method involves the steps of feeding a moldable material from a feeder to an accumulator. The material is preferably melted prior to accumulation within the accu... | 08/06/1996 |
| 5520874 | Compressible mold plunger A plunger (22), used in a standard mold, has a movable piston (23) and spring (24) that reduce the cull space when piston (23) is pressed downward into the cull mold compound.... | 05/28/1996 |
| 5494632 | Method for applying afterpressure on injection molding compounds A method and an apparatus for applying afterpressure on injection molding compounds, particularly PET compounds in an injection molding machine including an injection mold and a screw connected to the injection mold through supply ducts. The injection mol... | 02/27/1996 |
| 5470514 | Injection molding method for a shot of determined mass A non-return valve (10) primarily for use with an injection molding machine utilizes a frame (12) which surrounds a first bore (34) and a second bore (32). The second bore (32) is accessed by inlets (30). Outlet passages (40) are located downstream of sai... | 11/28/1995 |
