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WO2008017138A1 - Joint pour un système de moulage de métal - Google Patents

Joint pour un système de moulage de métal Download PDF

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Publication number
WO2008017138A1
WO2008017138A1 PCT/CA2007/001213 CA2007001213W WO2008017138A1 WO 2008017138 A1 WO2008017138 A1 WO 2008017138A1 CA 2007001213 W CA2007001213 W CA 2007001213W WO 2008017138 A1 WO2008017138 A1 WO 2008017138A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface
seal member
seal
molding material
barrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CA2007/001213
Other languages
English (en)
Inventor
Valentin Diaconu
Svemir Dzafic
Waldemar Janusz Wieczorek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Husky Injection Molding Systems Ltd
Husky Injection Molding Systems SA
Original Assignee
Husky Injection Molding Systems Ltd
Husky Injection Molding Systems SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Husky Injection Molding Systems Ltd, Husky Injection Molding Systems SA filed Critical Husky Injection Molding Systems Ltd
Publication of WO2008017138A1 publication Critical patent/WO2008017138A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2023—Nozzles or shot sleeves

Definitions

  • the present invention generally relates to, but is not limited to, metal molding systems, and more specifically the present invention relates to, but is not limited to, (i) a seal of a metal molding system, (ii) a runner system of a metal molding system including a seal, (iii) a barrel assembly of a metal molding system including a seal, (iv) a metal molding system including a seal, and (v) a method of configuring a seal in a metal molding system.
  • the molding system 10 includes an injection unit 14 and a clamp unit 12.
  • the injection unit 14 processes a metal molding material (not shown) into a melt that is in at least a partially molten state.
  • the injection unit 14 subsequently injects the melt into a closed and clamped injection mold, arranged in the clamp unit 12, in fluid communication therewith.
  • the injection mold is shown in an open configuration in FIG. 1 and comprises complementary mold hot and cold halves 23 and 25.
  • the injection unit 14 further includes an injection unit base 28 which slidably supports an injection assembly 29 mounted thereon.
  • the injection assembly 29 comprises a barrel assembly 38 arranged within a carriage assembly 34, and a drive assembly 36 mounted to the carriage assembly 34.
  • the drive assembly 36 is mounted directly behind the barrel assembly 38, for the operation (i.e., rotation and reciprocation) of a screw (not shown) arranged within the barrel assembly 38.
  • the injection assembly 29 is shown to be connected to a stationary platen 16 of the clamp unit 12, through the use of carriage cylinders 30.
  • the clamp unit 12 includes a clamp base 18 with a stationary platen 16 securely retained to an end thereof, a clamp block 22 slidably connected at an opposite end of the clamp base 18, and a moving platen 20 arranged to translate therebetween on a set of tie bars 32 that otherwise interconnect the stationary platen 16 and the clamp block 22.
  • the clamp unit 12 further includes a structure (not shown) for actuating the moving platen 20 and for clamping of the mold halves 23, 25 together during the injection of the melt of molding material.
  • the injection mold includes a molding cavity (not shown) formed between complementary molding inserts shared between the mold halves 23, 25.
  • the mold half 25 includes a runner system 26 that connects a melt passageway (not shown) of the barrel assembly 38 with the molding cavity for the filling thereof.
  • United States patent No. 6,942,006 (Inventor: KONO; Published: 13 September 2005) describes a metal injection molding apparatus with features which reduce the amount of metal which enters a drive mechanism of the apparatus.
  • the apparatus contains an injection chamber having an accumulation portion and a shaft housing portion.
  • the shaft housing may extend all the way to the position of an injection member in a fully retracted position.
  • the accumulation portion and the shaft housing may comprise different vessels attached to each other with an insulating gasket provided therebetween.
  • the insulator material of the gasket is preferably made of asbestos, a heat insulating ceramic or any other suitable heat resistant material.
  • the material to be injected such as a liquid or thixotropic metal, enters the injection chamber through an entry opening configured in the accumulation portion, and exits the accumulation portion, when injected, through a nozzle aperture configured at an end of the accumulation portion and into the mold.
  • the shaft housing portion may include openings in the sidewalls through which any melt leakage past from the injection member that has not been caught by a series of piston rings may egress. Accordingly, the shaft housing, and gasket, is not configured to experience pressurized melt of molding material.
  • Patent Number WO 9500312 discloses a hot runner distributor for supplying molten thermoplastic materials to hot nozzles at molding tools that has pipe plug-type connections that allow thermal expansion.
  • Each pipe plug-type connection has two mutually aligned pipe ends which surround the runner of molten material and are mutually separated by an expandable joint. Both pipe ends are enclosed in the area of the expandable joint by a common cooling ring.
  • the molten plastic material which solidifies under the action of the cooling ring seals the pipe plug-type connection in the area of the expandable joint.
  • a seal of a metal molding system includes a seal member configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system, and the seal member in conforming co-operation with an interface controls leaking of the molding material at the interface subject to the molding material approaching an injection pressure.
  • a runner system of a metal molding system including a seal.
  • the seal includes a seal member configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system, and the seal member in conforming co-operation with an interface controls leaking of the molding material at the interface subject to the molding material approaching an injection pressure.
  • a barrel assembly of a metal molding system including a seal.
  • the seal including a seal member configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system, and the seal member in conforming co-operation with an interface controls leaking of the molding material at the interface subject to the molding material approaching an injection pressure.
  • a metal molding system including a seal.
  • the seal includes a seal member configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system, and the seal member in conforming co-operation with an interface controls leaking of the molding material at the interface subject to the molding material approaching an injection pressure.
  • a method of configuring a seal in a metal molding system including arranging a seal member configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system in conforming co-operation with an interface to control leaking of the molding material at the interface subject to the molding material approaching an injection pressure.
  • a technical effect, amongst others, of the aspects of the present invention is the provision of a seal of a metal molding system that controls leaking of the molding material at an interface subject to the molding material approaching an injection pressure.
  • FIG. 1 is a side view of a metal molding system
  • FIG. 2A is a side view of a pair of melt conduits including a seal in accordance with an exemplary first, presently preferred, embodiment of the present invention
  • FIG. 2B is a section view through the melt conduits and seal of FIG. 2A, as taken along section line B-B;
  • FIG. 3A is a side view of a pair of melt conduits including a seal in accordance with an exemplary second embodiment of the present invention
  • FIG. 3 B is a section view through the melt conduits and seal of FIG. 3 A, as taken along section line B-B;
  • FIG. 4A is a side view of a pair of melt conduits including a seal in accordance with an exemplary third embodiment of the present invention
  • FIG. 4B is a section view through the melt conduits and seal of FIG. 4A, as taken along section line B-B;
  • FIG. 5A is a side view of a pair of melt conduits including a seal in accordance with an exemplary fourth embodiment of the present invention
  • FIG. 5B is a section view through the melt conduits and seal of FIG. 5A, as taken along section line B-B;
  • FIG. 6A is a side view of a pair of melt conduits including a seal in accordance with an exemplary fifth embodiment of the present invention.
  • FIG. 6B is a section view through the melt conduits and seal of FIG. 6A, as taken along section line B-B;
  • FIG. 7 is an exploded perspective view of a runner system of the metal molding system including a seal in accordance an exemplary sixth embodiment of the present invention.
  • FIG. 8A is a section view of a barrel assembly of the metal molding system including a seal in accordance an exemplary seventh embodiment of the present invention
  • FIG. 8B is a detailed view of the seal of FIG. 8A;
  • FIG. 9A is a section view of a barrel assembly of the metal molding system including a seal in accordance an exemplary eighth embodiment of the present invention.
  • FIG. 9B is a detailed view of the seal of FIG. 9A;
  • FIG. 1 OA is a section view of a barrel assembly of the metal molding system including a seal in accordance an exemplary ninth embodiment of the present invention
  • FIG. 1 OB is a detailed view of the seal of FIG. 1OA
  • FIG. 1 IA is a side view of a sprue bushing and machine nozzle including a seal in accordance with an exemplary tenth embodiment of the present invention
  • FIG. 1 IB is a section view through the sprue bushing, machine nozzle, and seal of FIG. 1 IA, as taken along section line B-B.
  • FIG. 2A & 2B depict a seal 60 in accordance with a first, presently preferred, embodiment of the invention that is configured between a pair of melt conduits 70, 70'.
  • the exemplary melt conduits 70, 70' are tubular members with a melt passageway 48 extending therethrough.
  • a heating structure 50 such as resistance and/or inductance heaters, is disposed on the outside the melt conduits 70, 70' to controllably maintain the melt of molding material in the melt passageway 48 at a processing temperature.
  • the melt conduits 70, 70' form a spigot connection along interposed spigot portions 71 , 71 ' that are arranged at the ends of the melt conduits 70, 70'.
  • An interface 64 is defined between annular mating faces 73, 73' of the spigot portions 71, 71'.
  • a seal member 62 configured as an annular body, is arranged at the interface 64 between the mating faces 73, 73'.
  • the seal member 62 in conforming co-operation with the interface 64 controls leaking of the molding material at the interface 64 subject to the molding material approaching an injection pressure.
  • the seal member 62 is configured to be chemically compatible with, and of a different composition than, a molding material processed in the metal molding system, typically an alloy of Magnesium such as AZ91D.
  • the seal member 62 is made from low-carbon steel such as AISI 1010.
  • the melt conduits 70, 70' are preferably made from hot work tool steel, such as DIN 1.2888.
  • the relatively soft seal member 62 is deformed to conform with the mating faces 73, 73' in response to a sealing force applied across the interface 64.
  • the seal member 62 may be deformed plastically or elastically.
  • the foregoing material combination may be reversed wherein the seal member 62 is made from the harder material and the mating faces 73, 73' of the melt conduits 70, 70' conform instead to the seal member 62.
  • the seal member 62 may also be made from stainless steel, and cobalt alloys.
  • FIG. 3 A & 3B depict a seal 160 in accordance with a second embodiment of the invention that is configured between a pair of melt conduits 170, 170'.
  • the exemplary melt conduits 170, 170' are tubular members with a melt passageway 148 extending therethrough.
  • An interface 164 is defined between annular mating faces 173, 173' at the ends of the melt conduits 170, 170'.
  • a seal member 162, configured as an annular body, is arranged at the interface 164 between the mating faces 173, 173'. The seal member 162 in conforming co-operation with an interface 64 controls leaking of the molding material at the interface 164 subject to the molding material approaching an injection pressure.
  • the seal 160 further includes a cooling structure 180 for a controllable cooling of the interface 164 that has the technical effect of controlling the viscosity of the molding material in the vicinity of the interface 164 and thereby controlling the leakage through the interface 164.
  • the cooling ring includes a spigot portion 181 that forms a further interface 183 in cooperation with spigot portions 171, 171' configured along a step in an outer circumferential surface at the ends the melt conduits 170, 170' in an overlapping, closely- spaced, and mutually parallel relation.
  • the cooling structure 180 may controllably cool the interfaces 164, 183 sufficiently to solidify, at least partially, molding material in the vicinity of one or both of the interfaces 164, 183 to form a supplemental seal.
  • the cooling structure 180 is configured in accordance with the teachings of the United States patent publication, US No. 2005/0255189.
  • the cooling structure 180 is preferably an annular body with a coolant channel 182 defined therein.
  • the cooling structure 180 also preferably includes a temperature monitoring structure 186, 188, such as a thermocouple, to provide temperature feedback to a controller (not shown) in order that a flow and temperature of the coolant to the channel 182 may be controlled to effect a temperature control of the interfaces 164, 183.
  • Fittings 184 are shown for connecting the cooling ring 180 to a coolant source.
  • the cooling structure 180 may operate more simply as a heat radiator, for example to pass heat to a cooled plate of a runner system (such as plate 562, 564 of runner system 526 depicted in FIG. 7).
  • FIG. 4A & 4B depict a seal 260 in accordance with a third embodiment of the invention that is configured between a pair of melt conduits 270, 270'.
  • the exemplary melt conduits 270, 270' are tubular members with a melt passageway 248 extending therethrough.
  • the melt conduits 270, 270' form a spigot connection along interposed tapered spigot portions 271, 271' that are arranged at the ends of the melt conduits 270, 270'.
  • An interface 264 is defined between tapered peripheral mating faces 273, 273' of the spigot portions 271, 271'.
  • a seal member 262 configured as a frusto-conical shaped tubular body, is arranged at the interface 264 between the mating faces 273, 273'.
  • the seal member 262 in conforming co-operation with the interface 264 controls leaking of the molding material at the interface 264 subject to the molding material approaching an injection pressure.
  • the relatively soft seal member 262 is deformed to conform with the mating faces 273, 273' in response to a sealing force applied across the interface 264.
  • FIG. 5A & 5B depict a seal 360 in accordance with a fourth embodiment of the invention that is configured between a pair of melt conduits 370, 370'.
  • the exemplary melt conduits 370, 370' are tubular members with a melt passageway 348 extending therethrough.
  • the melt conduits 370, 370' form a spigot connection along interposed spigot portions 371, 371' that are arranged at the ends of the melt conduits 370, 370'.
  • An interface 364 is defined between peripheral mating faces 373, 373' of the spigot portions 371, 371'.
  • a seal member 362, preferably configured as a tubular body, is arranged at the interface 364 between the mating faces 373, 373'.
  • the seal member 362 is to be made of a brazing alloy that is both chemically compatible with the molding material processed in the metal molding system and that has a melting temperature that is selected to be above a processing temperature range of the molding material.
  • a heating structure 350 is arranged near the interface 364 for a controlled heating of the seal member 362 to cause the seal member 362 to melt, at least partially, to effect a re-molding of the seal member 362 to conform to the interface 364.
  • the re-molded seal 362 adheres to the interface 364.
  • the re-molding of the seal member 362 is preferably completed once the melt conduits 370, 370' have been heated to their processing temperatures.
  • the heating structure 350 is controlled to reduce the temperature at the interface 364 to be below the melting temperature of the seal member 362.
  • the seal member 362 re-molded to be in conforming co-operation with the interface 364 controls leaking of the molding material at the interface 364 subject to the molding material approaching an injection pressure.
  • the brazing alloy includes a gold alloy.
  • the brazing material may be applied as a paste to the interface 364 during initial assembly.
  • the seal member 462 in conforming co-operation with an interface 464 controls leaking of the molding material at the interface 464 subject to the molding material approaching an injection pressure.
  • the seal member 462 is deformed to conform with the mating faces 473, 473' in response to a sealing force applied across the interface 464.
  • the seal member 462 may be deformed plastically or elastically.
  • the seal member 462 is configured as an elastically deformable spring energized seal member, such as AMERISEAL (a trademark of American Seal And Engineering Company, Inc.), which typically include a toroidal shaped casing surrounding a spring element.
  • Such seal members 462 are often made from alloys of nickel such as INCONEL (a trademark of Inco Alloys International, Inc) in which case a coating made from a material that is chemically compatible with the molding material, such as alloys of gold, is preferably disposed around the seal member 462.
  • the composite seal member 462 may have, for example, a square, rectangular, oval, or racetrack configuration.
  • FIG. 7 depicts a seal 560 in accordance with a sixth embodiment of the invention that is configured between a first and second manifold 570, 572, of an exemplary runner system 526.
  • the seal 560 is configured in accordance with the seal 60 of the first embodiment of the invention.
  • any one of, combination, or permutation of the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, or fifth embodiment may otherwise be used to control leaking of molding material between components of the runner system 526.
  • the runner system 526 is configured to include multiple drops, or gates, to the mold (not shown).
  • the first and second manifolds 570 and 572 are arranged in manifold pockets (not shown) defined between a manifold plate 564 and a backing plate 562.
  • the manifolds 570, 572 are also preferably configured to be located in the manifold pockets with an arrangement of side and axial insulators 506, 508, 510 that assist in isolating the heated manifolds 570, 572 from the relatively cool plates 562, 564 and to transfer forces thereto.
  • the sealing force to register the seal member 562 in conforming co-operation with the interface (not shown) between the manifolds 570, 572 may be achieved through the appropriate selection of cold clearances between the manifolds 570, 572, their insulators 506, 508, 510, and the manifold pockets (not shown) such that when heated to a processing temperature the resultant thermal growth in the manifolds 570, 572 is sufficient to both take-up the cold clearance, if any, and to generate an interference that provides the sealing force.
  • an actuator (not shown) may be placed in the runner system 526 to compress the manifolds 570, 572 together to provide the sealing force.
  • the runner system 526 is also shown to include a nozzle drop 573 for connecting the second manifolds 572 with the mold cavity, or cavities (not shown).
  • the interface between the second manifold 572 and the nozzle drop 573 is preferably configured in accordance with any of the seals 60, 160, 260, 360, 460 in accordance with the foregoing embodiments.
  • the runner system 526 is configured to include two vertically oriented drops, other quantities and configurations of drops are possible.
  • the runner system 526 may include only a single drop that is centered with an interface with a molding machine nozzle 44, or alternatively offset therewith.
  • FIG. 8A & 8B depict a seal 660 in accordance with a seventh embodiment of the invention that is configured in a barrel assembly 638.
  • the barrel assembly 638 includes a barrel head 642 that is positioned intermediate a machine nozzle 644 and a front end of a barrel 640.
  • a melt passageway 648 extends through the components of the barrel assembly 638.
  • the melt passageway 648 of the barrel 640 is disposed along a liner 646 made from a corrosion resistant material, such as STELLITE (a trademark of Deloro Stellite, Inc.) to protect the barrel substrate material, commonly made from a nickel-based alloy such as INCONEL, from the corrosive properties of the molding material.
  • STELLITE a trademark of Deloro Stellite, Inc.
  • the components of the barrel assembly 638 are shown to be held together, at least in part, through the use of fasteners 51.
  • the barrel 640, barrel head 642, and the machine nozzle 644 each include a heating structure 50 for controlling the molding material in the melt passageway 648 at a processing temperature.
  • the exemplary barrel assembly 638 further includes an auxiliary member 641 arranged to overlap flange portions of the barrel head 642 and barrel liner 646 to provide alignment therebetween.
  • the seal 660 is arranged at an interface 664 between the liner 646 of the barrel 640 and the barrel head 642.
  • the seal 660 is configured similarly to the seal 460 of the fifth embodiment of the invention.
  • any one of, combination, or permutation of the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, or fifth embodiment may otherwise be used to control leaking of molding material between components of the barrel assembly 638.
  • the interface 664 is defined between annular mating faces 473, 473' provided at the end of the barrel liner 646 and a surface of a groove 663 formed on the rear of the barrel head 642.
  • a composite seal member 662 preferably configured in the shape of a torus body, is arranged at the interface 664 between the mating faces 673, 673'.
  • the seal member 662 in conforming co-operation with an interface 664 controls leaking of the molding material at the interface 664 subject to the molding material approaching an injection pressure.
  • the seal member 662 is deformed to conform with the mating faces 673, 673' in response to a sealing force applied across the interface 664.
  • the sealing force is preferably generated by the tightening of the fasteners 51 that bolt the barrel head 642 to the barrel 640.
  • FIG. 9A & 9B depict a seal 760 in accordance with an eighth embodiment of the invention that is configured in a barrel assembly 738. Similar to the barrel assembly 638 of the seventh embodiment, the barrel assembly 738 includes a barrel head 742 that is positioned intermediate a machine nozzle
  • a melt passageway 748 extends through the components of the barrel assembly 738.
  • the melt passageway 748 of the barrel 740 is disposed along a liner 746.
  • An auxiliary device (not shown), such as dowels, may be used to align the barrel head 742 with the barrel 740 in place of the auxiliary member 641 of the foregoing embodiment.
  • the seal 760 is configured similarly to the seal 60 of the first embodiment of the invention.
  • any one of, combination, or permutation of the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, or fifth embodiment may otherwise be used to control leaking of molding material between components of the barrel assembly 738.
  • a seal member 762 configured as an annular body, is arranged at the interface 764 between the mating faces 773, 773'. The seal member 762 in conforming co-operation with an interface 764 controls leaking of the molding material at the interface 764 subject to the molding material approaching an injection pressure.
  • the seal member 762 is deformed to conform with the mating faces 773, 773' in response to a sealing force applied across the interface 764.
  • the sealing force is preferably generated by the tightening of the fasteners 51 that bolt the barrel head 742 to the barrel 740.
  • FIG. 1OA & 1OB depict a seal 860 in accordance with a ninth embodiment of the invention that is configured in a barrel assembly 838. Similar to the barrel assembly 638 of the seventh embodiment, the barrel assembly 838 includes a barrel head 842 that is positioned intermediate a machine nozzle
  • a melt passageway 848 extends through the components of the barrel assembly 838.
  • the melt passageway 848 of the barrel 840 is disposed along a liner 846.
  • the exemplary barrel assembly 838 further includes a cooling structure 880 that is arranged to overlap flange portions of the barrel head 842 and barrel liner 846 to provide alignment therebetween and to cool an interface 864 formed between the barrel head 842 and the barrel liner 846.
  • the cooling structure 880 is preferably an annular body with a coolant channel 882 defined therein.
  • the cooling structure 880 also preferably includes a temperature monitoring structure (not shown) to provide temperature feedback to a controller (not shown) in order that a flow and temperature of the coolant to the channel 882 may be controlled to effect a temperature control of the interface 864.
  • the exemplary barrel assembly 838 further includes an auxiliary member 841 that surrounds the cooling structure 880 as a structural spacer.
  • the seal 860 is configured similarly to the seal 160 of the second embodiment of the invention.
  • any one of, combination, or permutation of the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, or fifth embodiment may otherwise be used to control leaking of molding material between components of the barrel assembly 838.
  • a seal member 862 configured as an annular body, is arranged at the interface 864 between the mating faces 873, 873'. The seal member 862 in conforming co-operation with an interface 864 controls leaking of the molding material at the interface 864 subject to the molding material approaching an injection pressure.
  • the seal member 862 is deformed to conform with the mating faces 873, 873' in response to a sealing force applied across the interface 864.
  • the sealing force is preferably generated by the tightening of the fasteners 51 that bolt the barrel head 842 to the barrel 840.
  • the cooling structure 880 provides for a controllable cooling of the interface 864 that has the technical effect of controlling the viscosity of the molding material in the vicinity of the interface 864 and thereby controlling the leakage through the interface 864.
  • the cooling structure 880 may controllably cool the interfaces 864, 883 sufficiently to solidify, at least partially, molding material in the vicinity of one or both of the interfaces 864, 883 to form a supplemental seal.
  • the barrel assembly may include a multi-component barrel, for example having a first and second barrel portions.
  • the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, and/or fifth exemplary embodiments or further variants thereto, may be configured at an interface between the first and second barrel portions.
  • FIG. 1 IA & 1 IB depict a seal 960 in accordance with a tenth embodiment of the invention that is configured between a machine nozzle 944 and a mold sprue bushing 970.
  • the seal 960 is configured similarly to the seal 60 of the first embodiment of the invention.
  • any one of, combination, or permutation of the seals 60, 160, 260, 360, 460 in accordance with the first, second, third, fourth, or fifth embodiment may otherwise be used to control leaking of molding material between the machine nozzle 944 and the sprue bushing 970.
  • the machine nozzle 944 and the mold sprue 970 form a spigot connection along interposed spigot portions 971, 971'.
  • An interface 964 is defined between annular mating faces 973, 973' of the spigot portions 971, 971'.
  • a seal member 962 configured as an annular body, is arranged at the interface 964 between the mating faces 973, 973'.
  • the seal member 962 in conforming co-operation with the interface 964 controls leaking of the molding material at the interface 964 subject to the molding material approaching an injection pressure.
  • one of the seal member 962 and the mating faces 973, 973' are deformed to conform with the other in response to a sealing force applied across the interface 964.
  • the sealing force is typically provided by a carriage force applied along the barrel assembly (not shown) that maintains the machine nozzle 944 engaged in the sprue bushing 970.
  • the seal 60, 160, 260, 360, 460, 560, 660, 760, 860, 960 of the embodiments of the present invention, and variants thereto, may be used in any combination, or permutation, including with other known seals, to supplement, the control of leaking through an interface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un joint pour un système de moulage de métal comprenant un élément de joint qui coopère avec une interface à l'intérieur du système pour contrôler les fuites de matériau de moulage à l'interface. L'élément de joint est déformable de manière à se conformer à l'interface en réponse à une force d'étanchéité appliquée sur l'interface et pouvant être remoulée pour se conformer à l'interface. Une structure de chauffage fait fondre au moins partiellement l'élément de joint. Au moins une partie de l'élément de joint qui est exposée au matériau de moulage peut être constituée d'un acier à faible teneur en carbone, d'un alliage en acier inoxydable, d'un alliage en or, d'un alliage en cobalt et/ou d'un alliage de brasage.
PCT/CA2007/001213 2006-08-11 2007-07-11 Joint pour un système de moulage de métal Ceased WO2008017138A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/502,942 2006-08-11
US11/502,942 US20080035297A1 (en) 2006-08-11 2006-08-11 Seal of a metal molding system

Publications (1)

Publication Number Publication Date
WO2008017138A1 true WO2008017138A1 (fr) 2008-02-14

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PCT/CA2007/001213 Ceased WO2008017138A1 (fr) 2006-08-11 2007-07-11 Joint pour un système de moulage de métal

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US (1) US20080035297A1 (fr)
TW (1) TW200823040A (fr)
WO (1) WO2008017138A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7874833B2 (en) * 2009-05-03 2011-01-25 Mold-Masters (2007) Limited Injection molding runner apparatus having pressure seal
CN119159001A (zh) * 2024-11-18 2024-12-20 四川泛华航空仪表电器有限公司 电嘴收口装配装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1055675A (fr) * 1974-12-24 1979-06-05 Rio Bellocci Element de raccordement etanche pour moule et tuyau de coulee en metal pour la coulee basse pression
CA2436026A1 (fr) * 2001-02-23 2002-08-29 Husky Injection Molding Systems Ltd. Fut pour moule a injection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040589A (en) * 1989-02-10 1991-08-20 The Dow Chemical Company Method and apparatus for the injection molding of metal alloys
US5163721A (en) * 1990-10-24 1992-11-17 Cajon Company Fluid coupling with gasket retainer having interlocking portions
US5333919A (en) * 1993-09-02 1994-08-02 Ron Nerenberg Gasket for a pipe joint
US6474399B2 (en) * 1998-03-31 2002-11-05 Takata Corporation Injection molding method and apparatus with reduced piston leakage
US6357511B1 (en) * 2000-10-26 2002-03-19 Husky Injection Molding Systems, Ltd. Injection nozzle for a metallic material injection-molding machine
EP1680247B1 (fr) * 2003-03-06 2010-06-09 Husky Injection Molding Systems Ltd. Appareil de carotte
US20050255189A1 (en) * 2004-05-17 2005-11-17 Manda Jan M Method and apparatus for coupling melt conduits in a molding system and/or a runner system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1055675A (fr) * 1974-12-24 1979-06-05 Rio Bellocci Element de raccordement etanche pour moule et tuyau de coulee en metal pour la coulee basse pression
CA2436026A1 (fr) * 2001-02-23 2002-08-29 Husky Injection Molding Systems Ltd. Fut pour moule a injection

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