Abstract: A hip spacer mold forming a spacer with a spacer stem connected to a spacer head has a stem portion for forming a spacer stem. The hip spacer mold also has a plurality of interchangeable head modules configured for alternatively forming spacer heads of a plurality of different predetermined sizes. The head modules are configured to be disposed adjacent the stem portion.

Abstract: An apparatus for injection molding is provided. The apparatus includes an injection unit and a mold unit. The injection unit includes a nozzle having a first flat end surface. The mold unit includes a sprue bushing for communicating with the nozzle. The sprue busing has a second flat end surface. The sprue bushing is in contact with the first flat end surface of the nozzle. Wherein a protrusion is formed on one of the first flat end surface of the nozzle and the second flat end surface of the sprue bushing, and a corresponding recess is defined on the other of the first flat end surface of the nozzle and the second flat end surface of the sprue bushing. The protrusion is engaged in the recess.

Abstract: An injection molding shutoff assembly that includes a chamber containing a movable body movable between rear and forward positions. In the rear position, the movable body provides a seal and prevents flow of molten plastic out the chamber inlet, called drool. When the movable body is in the forward position, one or more passages permit flow of the molten plastic around the movable body and to an exit in the chamber, leading to one or more molds. In an alternate embodiment, the apparatus also includes an elongate stem that maintains the movable body in the forward position allowing the injection molding system to decompress, thereby eliminating drool and decreasing downtime.

Abstract: The present invention relates to a press for encapsulating electronic components, comprising: two displaceable mold parts (5,6), feed means for encapsulating material, and a drive mechanism connecting onto the mold parts. In a first embodiment the drive mechanism is provided with a fluid bed (14) and a first fluid feed (15) whereby their connection can be interrupted by a displacer (16). In a further embodiment a displacer (28) is provided in the feed channel (26) to place the encapsulating material (25) under pressure. Furthermore, the present invention relates to methods for encapsulating electronic components with encapsulating material in such presses.

Abstract: Injection molding apparatus has upper and lower mold halves that split along the center line of the parison cavity and the gate opening leading thereto. Each hot melt injection nozzle is received within a tubular insert cup having a reduced diameter tip that is seated within the gate opening. The cup is mounted to the lower mold half so as to remain secured thereto as the upper mold half opens and closes the mold. The base end of each nozzle has a swivel ball and socket relationship with the manifold block which supplies it with hot melt, while the tip end of each injection nozzle has a swivel ball and socket type interface with the interior front end of the insert cup, thus providing for dimensional variations in the parts of the tooling that arise during non-uniform thermal expansion and contraction thereof.

Abstract: A device for producing a polymerizable synthetic material optical lens, including a closure member (12) that is adapted to grip two molding shells (14A, 14B) circumferentially to define a molding cavity (15) in conjunction with the shells (14A, 14B), the closure member (12) including a synthetic material wall (123) adapted to come into contact with the molding shells (14A, 14B) and the closure member (12) incorporating a molding material introduction passage (125) discharging into the molding cavity (15) through a casting opening (126); characterized in that the closure member (12) includes a seal (40) that forms the contact wall (123) and the introduction passage (125), which joint (40) is formed of an elastomer material and of a rigid insert (43) at least part of which has the elastomer material molded over it, the introduction passage (125) being inside the insert (43).

Abstract: There is provided an injection die characterized in that the injection die is separated into at least two pieces, that a cavity for frame is formed between the separated dies, that the cavity for frame is provided with an additional cavity via a coupling hole, and that the coupling hole communicating with the additional cavity is provided at a confluence point of a resin in melted condition of the cavity for frame, at around a gate, at around a cavity for a fixing component, or at around a cavity for frame of which thickness is deep.

Abstract: An injection moulding tip (3) for an injection moulding nozzle assembly (100) has an inlet (4a) at a first end, at least one outlet (4b) at a second end and a flow path (4) between the inlet (4a) and the outlet (4b). A first portion (26) of the tip (3) adjacent the first end has a first diameter, a second portion (31) adjacent the second end has a second diameter, and a central portion (29) between the first and second portions has a diameter that is greater than the first and second diameters. An injection moulding tip is also disclosed.

Abstract: A cavity is formed between stationary and movable mold members, and a runner is connected to a gate to the mold cavity to supply a molten resin material thereto. The stationary and movable mold members have bodies of an aluminum alloy of high heat conductivity and light weight. Iron base plating is applied at least to transfer wall surfaces of the cavity, leaving and exposing other wall surfaces in a non-plated state.

Abstract: The invention relates to a method and an injection-molding machine with modular structure. In the solution proposed, to optimize logistics, in particular transport, the design and the construction of at least the mould-clamping mechanism side (7) and the injection system side (8) of the machine are modular. There are central unitary mounting and coupling interfaces (13 and 14 or 15, 15?, 15?) by way of which a mould-clamping module (1), a system module (16) and a drive module (17) are connected. The three modules can be selected freely from appropriate ranges of mould-clamping modules and system modules and drive modules.

Abstract: A nozzle body defines an upstream channel. A downstream bracing portion has a lateral bore. A nozzle tip extends laterally through the lateral bore of the bracing portion and has a sealing surface for engaging a gate component that defines a mold gate. The runnerless nozzle further includes a securing component inserted into the bracing portion to hold the nozzle tip against the bracing portion. The bracing portion or the securing component defines a lateral channel in communication with the upstream channel for delivering molding material to the nozzle tip. The nozzle tip can be removed by removing the securing component.

Abstract: A side gate type injection molding die prevents a weld line from being generated on a molded component made of a resin material to which a brightening agent is added, avoiding inferior appearance. The side gate type injection molding die including a product portion 7, which is a space for molding, and a side gate 8, which is used to inject the material into the product portion 7, in which the side gate 8 is formed so as to have a rectangular transverse cross section in a contact part 9 between the product portion 7 and the side gate 8, is configured so that at least one of corner parts 9e of the transverse cross section formed into a rectangular shape in the contact part 9 of the side gate 8 is formed in a curved shape; and the resin material to which the brightening agent is added is injected into the product portion 7 from the side gate 8 to manufacture a molded component 1.

Abstract: Molding system for filling mold with molding material, comprising: extruder, including: barrel configured to process molding material being pushable from barrel; barrel head operatively attached to barrel; screw disposed in the barrel; and screw drive connected to screw; stationary platen support a stationary mold portion; movable platen configured to be movable relative to the stationary platen; and body overlapping and sealing, at least in part, barrel and barrel head, body including: flange received at interface between barrel and barrel head, flange abutting end of barrel, flange abutting end of barrel head; and outer surface protruding from flange into interior of barrel, outer circumferential surface protruding from flange into interior of barrel head, outer surface sealing and overlapping against: (i) inner surface of barrel, and (ii) inner surface of barrel head; and body having coefficient of thermal expansion being: (i) greater than barrel, and (ii) greater than barrel head.

Abstract: Provided are an arrangement for guiding a mold set relative to a hot runner in the molding system and a method thereof. For example, an arrangement for guiding a mold set relative to a hot runner, the mold set including a cavity half and a core half, the mold set and the hot runner for use in a molding machine, is provided. The arrangement comprises a guiding member disposed on the hot runner; a guided member disposed on the cavity half; the guiding member and the guided member configured to cooperate to guide the mold set relative to the hot runner in a first direction and, sequentially, in a second direction, the second direction traversing the first direction.

Abstract: A manifold plug for a hot runner manifold for an injection molding system has a generally circular shaped outer surface in which is disposed a channel extending along at least an arc of the generally circular shaped outer surface of the manifold plug. The manifold plug is configured for insertion into a generally circular shaped opening in the hot runner manifold and serves to fluidly interconnect at least first and second hot runner passageways which are otherwise unconnected and which terminate in the generally circular opening in the hot runner manifold. The channel in the generally circular shaped outer surface of the manifold plug is configured for fluidly connecting at least first and second unconnected resin passageways.

Abstract: An injection molding machine includes a clamping unit constructed for support of at least two molding tools to provide at least two different cavities. A first plasticizing unit is provided for charging one of the cavities in one of the molding tools, and a second plasticizing unit is provided for charging the other one of the cavities in the other one of the molding tools. The second plasticizing unit is hereby attached to a mounting in a substantially vertical orientation. The mounting may be mounted on one of the platens of the injection molding machine or on a frame which extends above the clamping unit.

Abstract: Disclosed herein is a transition channel for conveying fluid between a first conduit and a second conduit in a molding system. For example, there is disclosed a transition channel for providing a flow path between a first conduit having a first cross-section and a second conduit having a second cross-section in a molding system, the transition channel configured to have a shape that follows a curve that substantially corresponds to melt natural stream lines.

Abstract: A mold is provided having a porous metal insert through which a mold release agent can be pumped to provide a desired, precisely metered quantity or coating of the release agent at a desired location along the inner surface of a mold cavity, or at the inner surface of an injection port, between or at periodic intervals of successive moldings of parts. The need to manually apply mold release agent between successive moldings, for example to the injection port of an injection mold, is reduced, thereby reducing or substantially eliminating inconsistent applications of release agent that are characteristic of manually applied coatings. A method of molding using the disclosed porous metal insert also is provided.

Abstract: A sprue bar nozzle assembly for controlling flow of melt through conduits of a mold assembly for injection molding comprises a sprue bar extension and nozzle, the sprue bar extension comprising means for adjusting the overall length of the sprue bar nozzle assembly and the nozzle comprising a nose comprising a seating surface for mating engagement with a mating surface of a mating segment of a melt conveying conduit and a slide valve, an open position of the slide valve permitting melt to flow through the sprue bar nozzle assembly and a closed position preventing melt from flowing through the sprue bar nozzle assembly, the slide valve being biased to a closed position by a biasing means and being driven to the open position by forces applied to the nose of the nozzle as a result of closure of an associated mold assembly.

Abstract: An injection molding melt-conveyance system for conveying a molten molding material from an injection machine to an injection mold. The injection molding melt-conveyance system includes a first component having a first melt-channel and further includes a second component having a second melt-channel. A constant-force seal spring urges the first and second components toward one another so as to effect a seal that inhibits molten material flowing between the first and second melt channels from leaking through the seal. The constant force seal spring includes one or more Belleville springs each having an available deflection to thickness ratio chosen to provide that Belleville spring with a substantially constant spring force over a wide range of deflection.

Abstract: A plastic mold injection apparatus (300) is provided. The apparatus includes a runner system (110) that delivers a plastic melt through a flow tube (111), a cavity (120) that receives the plastic melt, and a hydraulic drive mechanism (130) that drives a pin in and out of a flow tube of the runner system. The runner system, the cavity, and the hydraulic drive mechanism are internal to, and operate within, the apparatus, to mix the plastic melt in the cavity. The hydraulic drive mechanism moves a first pin (141) out-of-phase with a second pin (142) to mix the plastic melt in the cavity. A first hydraulic pipe (151) removes hydraulic fluid to pull plastic melt into a first flow tube (111) from the cavity. A second hydraulic pipe (152) delivers hydraulic fluid to push out plastic melt from a second flow tube (112) to the cavity.

Abstract: A cavity is formed between stationary and movable mold members, and a runner is connected to a gate to the mold cavity to supply a molten resin material thereto. The stationary and movable mold members have bodies of an aluminum alloy of high heat conductivity and light weight. Iron base plating is applied at least to transfer wall surfaces of the cavity, leaving and exposing other wall surfaces in a non-plated state.

Abstract: An external sprue bar position alignment device is comprised of a mounting bracket and a sprue bar alignment frame that is attached to the mounting bracket. The sprue bar alignment frame and mounting bracket define a channel configured to receive a sprue bar upon a mold closing. The sprue bar alignment frame and the mounting bracket are disposed to maintain alignment of an end of the sprue bar with an injection nozzle. The device includes an adjustment device, said adjustment device provided for movement of at least one of the mounting bracket or the sprue bar position alignment frame relative to a path of the sprue bar such that at least one of the mounting block or the sprue bar position alignment frame may bias the sprue bar in a selected direction upon the molding closing. The sprue bar position alignment device may be adjusted without disassembling the mold.

Abstract: A discharge apparatus for a two-stage injection molding machine, includes a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage injection molding machine, for allowing a plastic material in the feeding portion to enter the injection portion via the runner; at least one check shaft disposed in the check shaft seat, and for opening and closing the runner via movement of the check shaft; at least one cover provided at a side of the check shaft seat, and having at least one discharge hole for discharging residues of the plastic material between the check shaft seat and the check shaft; and at least one adjustable unit for adjusting a discharge speed of the residues of the plastic material. The discharge hole and the adjustable unit can prevent locking of the check shaft and pollution from degraded residues of plastic material.

Abstract: A gating structure (13) for molding connects with a mold cavity (300). The gating structure includes a first gate (100), a second gate (200), an ejector sleeve (400) and an ejector pin (500). The second gate connects with the first gate at an angle. The ejector pin extends through the ejector sleeve. One part of the ejector pin fixes in the ejector sleeve, the other par of the ejector pin is received in the second gate.

Abstract: A mold for injection molding and a molding method using the same, in which multiple gates are provided to a curved runner, thereby easily molding a product having a complicated shape and a large width, and in which a plurality of curved runners are provided, thereby easily ejecting forms that are filled in the runners. The mold includes first and second molds defining a mold cavity, a first gate disposed at a first position of the mold cavity, a second gate disposed at a second position of the mold cavity spaced apart from the first position, a first curved runner provided to the second mold so as to be connected to the first gate, and a second curved runner provided to the second mold so as to be connected to the second gate. The first and second curved runners have inlets that are connected with each other, and cross-sectional areas that are gradually reduced from the inlets to the first and second gates.

Abstract: A mechanism for pressing a nozzle 26 of an injection device 10 against a die 33, comprises a hooking device 12 which moves so that a hooking body 23 hooks or does not hook on a to-be-hooked portion 24; and a traction device 11 having, on its one end, the hooking device 12 and having, on its other end, the injection device 10. In this mechanism, the portion of the hooking device 12, opposite to the side adjacent to the traction device 11 is attached to the die 33 in the vicinity of the portion of the die 33, against which the nozzle 26 is abutted.

Abstract: An injection molding self aligning articulated joint configured to be disposed between an injection unit and a hot runner. A joint is provided having first and second spherical surfaces and a melt channel therein. The joint is coupled to one of the injection unit and the hot runner. First and second concave pads are provided to as to be respectively in contact with the first and second spherical surfaces. The first and second concave pads are configured to be movable with respect to the first and second spherical surfaces. At least one of the first and second concave pads is coupled to the other one of the injection unit and the hot runner.

Abstract: Tooling for the injection station of an injection blow molding machine includes a set of individual mounting bracket assemblies that attach an elongated manifold block to the lower die set of the machine. The relatively slender brackets are designed to have minimal thermal contact with the manifold block without sacrificing stability and structural integrity. Standard sizes of the brackets maybe manufactured in advance to accommodate manifold blocks of different lengths but standard widths.

Abstract: An injection molding apparatus includes combined sealing elements located between a nozzle head of an injection molding nozzle and a mold plate. The sealing elements are arranged so that they force the nozzle head toward an outlet surface of a manifold and provide a seal therebetween over a range of temperatures.

Abstract: A connecting member is formed by an upper plate portion and a side plate portion. One end of the upper plate portion is fixed to a fixed platen of an injection molding machine, and a lower end of the side plate portion is fixed to a base frame to which the fixed platen is fixed. This connecting member prevents the fixed platen from being tilted when a nozzle touch force is applied from an injection apparatus.

Abstract: A nozzle system is provided for an injection molding machine. The nozzle system includes a nozzle tip that is removably connected to a nozzle body with a sealing and mounting sleeve element. The nozzle body includes a first connector for releasably connecting with a second connector defined on the sleeve. The sleeve element further includes an alignment bearing for engaging a bearing surface defined on the nozzle body for precisely locating the nozzle tip within the nozzle body along on a predetermined axis. Further embodiments of the invention provide a valve pin disposed in the nozzle body and nozzle tip. The valve pin includes a bearing surface for engaging a guiding surface defined on the second melt channel for aligning the end of the valve pin with a mold gate. Further embodiments also provide an integrally connected nozzle tip and sleeve element.

Abstract: The invention provides a motor-driven injection molding apparatus in which an entire of the apparatus is simplified and made compact. In a motor-driven injection molding apparatus (1), a movable metal mold (12) clamped to a stationary metal mold (11) is mounted to a movable mold plate (13), and two ball screws (17, 18) for moving the movable mold plate (13) are passed through two points on opposing corners of the movable mold plate (13). End portions of the ball screws (17, 18) are set in a cantilever state, and are rotated via pulleys (55, 55) and a timing belt (56), thereby moving the movable mold plate (13). Further, the movable mold plate (13) is guided by a slide guide having a structure that a bearing unit (14) fixed to both sides of a lower portion thereof is fitted to linear rails (15, 16).

Abstract: The present invention is a methodology and apparatus for investment casting and injection molding of dentures. The apparatus utilizes a dental flask placed in a press held in position by a turn screw. An injector, comprised of a piston inserted into a dual open ended cylinder containing dental appliance materiel, is connected to the dental flask. A hydraulic jack presses the piston further into the cylinder to inject the dental appliance material into dental flask. To prevent contaminating contact of the dental appliance with the cylinder, the dental material is inserted first into an open ended bag that partially placed in a wire loop passing through the cylinder. As the wire loop is withdrawn from the cylinder, the open end bag is drawn into and properly oriented within the cylinder so that the open end of the bag meets the injection aperture of the dental flask.

Abstract: An in-mold degating device that includes a base having mounting ears for removable attachment to a mold system. The base is removably attached to the die half such that the uppermost surface of the base is flush with the surface of the die half. The insert further includes a body fixed to the base including a pair of opposed surfaces that define predetermined relief angles relative to the base. The body further includes a gate flow passage having an inlet within one of the opposed surfaces and an outlet within the other of the opposed surfaces. The gate flow passage tapers inwardly from the inlet to the outlet. The outlet includes an edge surface that forms an acute angle relative to the gate flow passage. The edge surface defines a shearing edge point that separates the finished molded part from cooled excess material.

Abstract: An injection molding system for forming a molded plastic part including a die having a pair of die halves which mate along their joining surfaces to form a parting line and define a mold cavity, a plurality of ejection pins within at least one of the die halves and operable to move the finished molded part in a direction away from at least one of the die halves, a gate removably mounted to one of the die halves, and a runner. The gate includes an inlet and an outlet having an edge surface extending in a direction generally opposite to the movement of the molded part upon ejection from the mold cavity. Upon separation of the two die halves, the ejection pins are then further operable to remove excess cooled plastic material from the gate and the runner.

Abstract: According to the present invention a coding plate is interspersed between first and second respective inlet and outlet cross over nozzle parts. The cooling plate engages ends of the cross over nozzles during mould filling and provides a melt transfer passage therebetween. Once the mould is filled, the cooling plate acts to dissipate heat from the melt transfer passage thereby promoting solidification of melt therein. Accordingly melt solidification in the sprue is assured with more certainty than prior art designs enabling relatively fax mould cycling with minimal risk of drool.

Abstract: A collar for a hot runner nozzle of an injection molding apparatus includes a generally cylindrical body having a first flange extending inwardly from a first end thereof. The first flange is provided to abut a nozzle head and at least a portion of a nozzle body of a nozzle. An alignment flange projects from an inner wall of the generally cylindrical body and is spaced from the first flange. The alignment flange contacts the nozzle body to restrict tipping of the collar relative to the nozzle during assembly of the injection molding apparatus.

Abstract: An injection molding method and device, wherein, in order to minimize dimension errors of molded products, molten resin is injected from a nozzle (23) retaining therein pre-pressurized molten resin such as plastic into the cavity (3) via an annular gate (24).

Abstract: A conduction member having conduction path for injecting molten molding material within a mold space is fitted to one of a pair of mold bodies which form the disc-shaped mold space. A first heat suppressing member for suppressing heat within the conduction path from being transmitted to the one of the mold bodies is disposed between the conduction member and the one of the mold bodies. Further, a second heat suppressing member is disposed at a position opposite to the first heat suppressing member at the time of mold-clamping the pair of the mold bodies.

Abstract: An improved injection molding runnerless manifold and nozzle system, method and apparatus in which the fluid plastic molding material transfer conduits, such as the manifold runner channels and cavity injection nozzle passageway, are constructed of a low thermal conductivity, non-metallic heat insulation structural material to thereby heat insulate the liquified molding material or resin, whether thermosetting or thermoplastic, while resident in the manifold runners and/or nozzle passageways. The heat transfer and other physical parameters of the conduit material and structure are such that this molding material remains at a reasonable uncured molding temperature while resident in the transfer conduit for the duration of at least one injection cycle due to the heat insulation characteristics of these fluid flow conduits of the system.

Abstract: An apparatus for thermally insulating a molding machine nozzle from the mold utilizing a flexible thermal barrier material made of polyimide.

Abstract: A method of sandwich molding, in which a first thermoplastic material is injected into a mold cavity followed by the injection of a second thermoplastic material expanding within the first thermoplastic material, eliminates the need for heated runner systems communicating from the injection nozzle of the injection molding machine to the mold cavity by employing a cold runner having sufficiently slow solidification time to allow subsequent injections from two injection sources. The backflow into the inactive branch is prevented by maintaining the injection nozzle against the mold until molding is complete.

Abstract: Am improved tip jacket for plastic injection molding nozzeles is described.

Abstract: The tail end of a heating barrel is supported by a front plate. The tail end portion of a screw is rotatably supported by an intermediate plate. Bearings are built in the rear plate. The nut of each of ball screws is attached to the front surface of the rear plate through a hollow shaft and the bearing. Through holes are provided in the intermediate plate. To the front surface of the intermediate plate are fixed load cells so as to block the front of the through holes. The leading end portion of the threaded rod of each of the ball screws and leading end portion of the nut are inserted in each of the through holes. The leading end of the threaded rod is fixed to the rear surface of the load cell.

Abstract: A method and apparatus for synchronizing the flows of molten polymer or similar materials in molding systems which utilize manifolds to direct flow into one or more cavities of an injection mold. The apparatus utilizes intermeshing positive displacement, interconnected gearing systems similar to positive displacement gear pumps in hydraulic systems. These positive displacement gear mechanisms are placed in each parallel flow channel such that all flow in each channel passes through a gear mechanism. After a mold cavity is filled, the gear mechanisms can be utilized as melt pumps to continue packing or holding plastic in the mold cavity. By reversing the pump mechanisms, precise decompression of the flow channels to eliminate gate stringing and other adverse effects can be accomplished.

Abstract: In a moulding machine for plastics comprising an injection assembly (1) mounted slidably on a frame of the machine and a moulding assembly (30) comprising a mould half (8) mounted on a fixed plate (6) integral with the machine frame, a movement apparatus (200) for the injection assembly comprises a chain transmission (209) connected to the injection assembly (1), a drive unit (211) that drives the chain transmission (209) to move the injection assembly (1) toward the moulding assembly (30) and return means (220) connected to the injection assembly (1) to allow the injection assembly (1) to be moved away from the moulding assembly (30).

Abstract: The present invention is directed to the structure of an inline runner for injection molding which uniformly increases the temperature of the injected compound as the compound flows from the injection port to single or multiple drop gates at the entrance to single or multiple injection mold cavities. The inline runner has two opposing series of parallel channels formed into the runner for the purpose of mixing the compound as it flows through the runner.

Abstract: A collar for a hot runner nozzle of an injection molding apparatus includes a generally cylindrical body having a first flange extending inwardly from a first end thereof. The first flange is provided to abut a nozzle head and at least a portion of a nozzle body of a nozzle. An alignment flange projects from an inner wall of the generally cylindrical body and is spaced from the first flange. The alignment flange contacts the nozzle body to restrict tipping of the collar relative to the nozzle during assembly of the injection molding apparatus.

Abstract: In an injection mold having a hot-runner mold, a tip having low thermal conductivity is provided in the end face of a nozzle to enable the nozzle to directly nozzle-touch a cavity mold without a heat insulating sheet.