Patents Assigned to Husky Injection Molding Systems Limited
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Patent number: 7401639Abstract: A sprue apparatus for use in a molding apparatus for connecting the melt duct of a molding machine nozzle with a runner system of a molding apparatus. The sprue apparatus includes a plurality of thermal regulators that regulate a plurality of thermal zones that segment the length of the sprue apparatus for the purpose of localized temperature control in support of a molding process. The plurality of zones may be thermally regulated such as to enable a substantially leak-free junction between the machine nozzle and the molding apparatus. The sprue apparatus may include an isolating coupler that substantially isolates a heated sprue bushing from carriage force. The invention has been found particularly useful when injecting metal alloys such as magnesium based alloys when in the thixotropic state.Type: GrantFiled: March 6, 2003Date of Patent: July 22, 2008Assignee: Husky Injection Molding Systems LimitedInventor: Jan Marius Manda
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Patent number: 7264463Abstract: Platen-mounted, post-mold cooling apparatus and method includes structure and/or steps for handling molded parts in an injection molding machine having a fixed platen, a moving platen, a core half, and a cavity half. A take off device coupled to the fixed platen is configured to remove molded parts from either the core half or the cavity half. A cooling device coupled to the moving platen is configured to cool the molded parts carried by the take off device. Preferably, the take off device extracts the just molded parts from the mold's core half and then moves linearly outboard of the mold halves. The subsequent movement of the moving platen to close the mold in the next molding cycle causes the cooling device's pins to engage the molded parts in the take off device part carriers. When the moving platen opens again, the molded parts are extracted from the part carriers by the cooling device pins. When the moving platen is fully open, the cooling device is rotated to eject the cooled parts from the machine.Type: GrantFiled: July 28, 2006Date of Patent: September 4, 2007Assignee: Husky Injection Molding Systems LimitedInventors: Robert Domodossola, Robin A. Arnott, Christopher Huntington
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Publication number: 20060263467Abstract: Platen-mounted, post-mold cooling apparatus and method includes structure and/or steps for handling molded parts in an injection molding machine having a fixed platen, a moving platen, a core half, and a cavity half. A take off device coupled to the fixed platen is configured to remove molded parts from either the core half or the cavity half. A cooling device coupled to the moving platen is configured to cool the molded parts carried by the take off device. Preferably, the take off device extracts the just molded parts from the mold's core half and then moves linearly outboard of the mold halves. The subsequent movement of the moving platen to close the mold in the next molding cycle causes the cooling device's pins to engage the molded parts in the take off device part carriers. When the moving platen opens again, the molded parts are extracted from the part carriers by the cooling device pins. When the moving platen is fully open, the cooling device is rotated to eject the cooled parts from the machine.Type: ApplicationFiled: July 28, 2006Publication date: November 23, 2006Applicant: Husky Injection Molding Systems LimitedInventors: Robert Domodossola, Robin Arnott, Christopher Huntington
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Patent number: 7104780Abstract: Platen-mounted, post-mold cooling apparatus and method includes structure and/or steps for handling molded parts in an injection molding machine having a fixed platen, a moving platen, a core half, and a cavity half. A take off device coupled to the fixed platen is configured to remove molded parts from either the core half or the cavity half. A cooling device coupled to the moving platen is configured to cool the molded parts carried by the take off device. Preferably, the take off device extracts the just molded parts from the mold's core half and then moves linearly outboard of the mold halves. The subsequent movement of the moving platen to close the mold in the next molding cycle causes the cooling device's pins to engage the molded parts in the take off device part carriers. When the moving platen opens again, the molded parts are extracted from the part carriers by the cooling device pins. When the moving platen is fully open, the cooling device is rotated to eject the cooled parts from the machine.Type: GrantFiled: March 21, 2003Date of Patent: September 12, 2006Assignee: Husky Injection Molding Systems LimitedInventors: Robert Domodossola, Robin A. Arnott, Christopher Huntington
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Patent number: 4272236Abstract: A nozzle for the introduction of liquefied plastic material into a mold has a channel terminating at one end in an injection orifice and adjoining at its other end a reduced bore serving for the guidance of a valve pin slidable with all-around clearance in that channel, the pin having a rear extremity projecting from its guide bore. A passage for the admission of liquefied molding material under pressure enters the channel at its junction with the reduced guide bore, rearwardly of a set of skew fins of the pin serving for additional guidance thereof in the channel and for imparting relative rotary motion to the flow and the pin. The orifice is blocked at the end of an injection operation by a pusher acting upon the projecting rear extremity; it is unblocked, upon withdrawal of the pusher, by the pressure of the molding material in the channel upon a forwardly facing annular shoulder of the pin.Type: GrantFiled: December 14, 1979Date of Patent: June 9, 1981Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Robert D. Schad
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Patent number: 4259056Abstract: Preforms or parisons to be blow-molded into bottles are produced in cavities of a lower mold half of a vertical injection-molding machine with the aid of respective cores depending into these cavities from an upper mold half when the mold is closed. As the two mold halves separate, the parisons adhere to the respective cores from which they are subsequently discharged into respective nests of a transfer box or respective cells of a blow-molding unit interposed between these mold halves. In the first instance, the parisons are cooled by a circulating air stream while the transfer box is laterally withdrawn before the start of a new injection-molding cycle, the rigidified parisons being then released from their nests to drop into pockets of an underlying conveyor transporting them to a blow-molding station. In the second instance, the cores are hollow and descend with their parisons into the blow-molding cells whose split walls are closed around the cores by fluidic or mechanical means.Type: GrantFiled: August 16, 1979Date of Patent: March 31, 1981Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Robert D. Schad
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Patent number: 4230442Abstract: A thrust member on column secured to a movable platen of an injection-molding machine, surrounded by a mounting frame with laterally withdrawable shutters which enter behind the thrust member in the terminal phase of a mold-closing stroke for transmitting to the thrust member a supplemental clamping force, is linked with a hydraulically actuated plunger or driving piston via a lost-motion coupling. The clamping force is supplied through one or more annular pistons received in respective cylinder chambers of a stationary housing linked via tie rods with a fixed platen. Upon the release of the clamping force, a counter-vailing hydraulic force is developed between the column and the driving piston, whose forward displacement is limited by a fixed abutment, to break open the mold with a larger hydraulic force.Type: GrantFiled: August 21, 1979Date of Patent: October 28, 1980Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Allan H. Robinson
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Patent number: 4209290Abstract: Preforms or parisons to be blow-molded into bottles are produced in cavities of a lower mold half of a vertical injection-molding machine with the aid of respective cores depending into these cavities from an upper mold half when the mold is closed. As the two mold halves separate, the parisons adhere to the respective cores from which they are subsequently discharged into respective nests of a transfer box or respective cells of a blow-molding unit interposed between these mold halves. In the first instance, the parisons are cooled by a circulating air stream while the transfer box is laterally withdrawn before the start of a new injection-molding cycle, the rigidified parisons being then released from their nests to drop into pockets of an underlying conveyor transporting them to a blow-molding station. In the second instance, the cores are hollow and descend with their parisons into the blow-molding cells whose split walls are closed around the cores by fluidic or mechanical means.Type: GrantFiled: April 7, 1978Date of Patent: June 24, 1980Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Robert D. Schad
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Patent number: 4207051Abstract: An injection-molding machine has a fixed and a movable outer platen bracketing a movable intermediate platen, the latter having a runner system conducted via an extensible or flexible conduit to a source of molten plastic material to be injected into cavities defined by respective pairs of mold portions supported by the three platens, the cavities being formed in part by cores carried on the outer mold portions. A stripper plate inserted between each pair of mold portions is articulated via a spring-loaded lost-motion link to a respective eccentric pin on a pinion which is rotatably mounted on the intermediate platen and meshes with a pair of racks respectively secured to the two outer platens; this linkage is duplicated on opposite sides of the mold. In an initial phase of a mold-opening stroke, the stripper plates move outwardly under spring pressure while remaining in contact with their respective outer mold portions whose cores still retain the freshly molded articles.Type: GrantFiled: January 11, 1979Date of Patent: June 10, 1980Assignee: Husky Injection Molding Systems LimitedInventors: John B. Wright, Robert D. Schad
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Patent number: 4197073Abstract: A vertical injection-molding machine with two overlappingly operating injection molds produces two sets of eight parisons each in staggered operating cycles. Each set of parisons is transferred by a respective carrier assembly, immediately upon the opening of the respective injection mold, into the vicinity of a blow-molding unit with eight cells in which the parisons are inflated into bottles during half an injection cycle. The transfer from the closely spaced injection cavities to the blow-molding unit is performed by several carriers moving over laterally diverging tracks whereby the parisons arrive at the blow-molding unit in pockets of these carriers already separated to the extent necessary for joint introduction into the eight-cell blow mold.Type: GrantFiled: May 10, 1978Date of Patent: April 8, 1980Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Robert Schad
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Patent number: 4118168Abstract: A mold with two relatively movable portions, one of them having one or more shallow cavities for the production of substantially flat articles, is provided with lateral guide elements which, upon separation of the two mold portions by a distance exceeding but slightly the depth of these cavities, define with the separated mold portions a vertical channel through which the ejected articles descend with a predetermined orientation onto an underlying conveyor or other receiver therefore. The guide elements may be retractable into the mold portion on which they are supported, or partly receivable in the opposite mold portion when the mold is closed. Some of the guide elements could be extensions of ejectors serving to dislodge a molded article from its cavity.Type: GrantFiled: May 2, 1977Date of Patent: October 3, 1978Assignee: Husky Injection Molding Systems LimitedInventors: Herbert Rees, Robert Dietrich Schad
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Patent number: 3938675Abstract: A conveyor mechanism including two belts carries two types of interfitting molded articles such as cups and lids from a molding machine to an assembly station, maintaining a constant orientation between them. The assembly station comprises a pair of synchronized and overlapping star wheels, counterrotated by a Geneva drive, which remove the molded articles from the conveyor belts, bring them into vertical alignment, and come to a momentary stop in this position in which a plunger synchronized with the Geneva motion of the star wheels joins the two parts together and pushes them into an overlying stacker tube, whereupon the star wheels resume their motion. Several stacker tubes, linked by an endless transport chain, are capable of receiving a limited number of pairs of molded articles, their drive mechanism being so coupled with the star-wheel drive as to advance the chain to bring a loaded stacker tube to an unloading station whenever a preceding tube in the array has been filled.Type: GrantFiled: February 24, 1975Date of Patent: February 17, 1976Assignee: Husky Injection Molding Systems LimitedInventor: Herbert Rees