Abstract: A hot runner (10) is provided including a canal (11) and a heat-shrinkable tube (12) covering on the canal (11). The heat-shrinkable tube (12) can shrink along the canal (12)'s contour when heated. The present invention further provides a mold (20) using the hot runner.

Abstract: A nozzle adapter for an injection molding machine includes a body and one or more retainers mountable to an outer surface of the body. When the body and a retainer are assembled together they cooperate to define a cavity adapted to contain a cartridge heater between the body and the retainer. Access to allow replacement of the cartridge heater can be gained by removing the retainer from the body without removing the entire nozzle adapter from the injection molding machine.

Abstract: A two stage spring pack device comprising a nozzle or back up insulator, surrounded by a first stage spring for applying an initial force, and a plurality of Belleville springs to exert a secondary force against a thermally expanding hot runner manifold in an injection molding system, precludes resin leakage between a manifold and nozzle or between mating manifolds in a cross manifold system. The first stage spring imparts a relatively low initial force against the hot runner components while the system heats up from ambient temperature to prevent plate bowing and component hobbing, until it is fully compressed, at which point a subsequently larger sealing force is exerted by the constant force Belleville springs to prevent leakage between the mating components at operating temperature and injection pressure.

Abstract: A flexible plate system for a hot runner assembly includes a backing plate; a manifold plate detachably connected to the backing plate; a manifold positioned between the backing plate and the manifold plate and having at least one nozzle associated therewith; and wherein the manifold plate has at least one plate slot that allows the nozzle to extend through the manifold plate and having at least a first lateral dimension substantially larger than the outside diameter of the nozzle.

Abstract: A hot runner system having a melt distribution system that is reusable and reconfigurable to vary drop or nozzle locations to meet various design requirements. The melt distribution system includes a melt distributor in fluid communication with a melt source, at least one melt conduit in fluid communication with the melt distributor, and at least one nozzle in fluid communication with the at least one melt conduit. The hot runner system also includes a backing plate; a manifold plate detachably connected to the backing plate; a melt distribution system positioned between the backing plate and the manifold plate and having at least one nozzle associated therewith. The hot runner system may be configured and reconfigured to accommodate various drop or nozzle locations.

Abstract: An injection molding machine is provided, including a nozzle assembly having a channel for conveying a fluid. At least one cavity insert is removably mounted within a cavity plate, the at least one cavity insert defining a mold cavity, and a first portion of a gate for communicating the fluid between the nozzle assembly and the mold cavity. A gate insert defines a receptacle for the nozzle assembly, and further defining a second portion of the gate. The gate insert is floatably retained between the nozzle assembly and the at least one cavity insert. Preferably, the gate insert is retained by a gate insert plate that is disposed between the cavity plate and the nozzle assembly.

Abstract: Principal components of injection molding apparatus include a U-frame, a carrier plate remotely affixable to the U-frame, preferably two cavity blocks remotely affixable to the carrier plate, a corresponding pair of core blocks, and a hot runner assembly remotely affixable to rear faces of the core blocks. These components are placed in a hydraulic press. In a molding operation, the U-frame, carrier plate and cavity blocks move as a unit relative to the hot runner assembly and the core blocks affixed thereto. To quickly change out one or both block pairs, a subassembly comprising the carrier plate and all core and cavity blocks is remotely released from the U-frame and the hot runner assembly and is removed as a unit. Face clamps in the front face of the carrier plate, the rear face of the cavity blocks, the rear face of the core blocks and the front face of the cavity blocks speed the changeout process and obviate potential damage to the molding geometry.

Abstract: An injection molding apparatus having a nozzle which includes a first nozzle body segment, a second nozzle body segment, and a thermal barrier coupled between the nozzle body segments. The first nozzle body segment, the thermal barrier, and the second nozzle body segment define a melt channel through the nozzle for delivering a melt stream from a manifold channel of a manifold to a mold cavity. The thermal barrier substantially limits the heat flow from one nozzle body segment to the other, to thereby control the heat distribution along the melt channel.

Abstract: The embodiments of invention relate to a hot runner nozzle including at least one nozzle duct for a plasticized plastic, which ends in a nozzle tip and which can be temperature-controlled by a heater, wherein the hot runner nozzle can be attached to an injection molding tool or the like and wherein the heater and the nozzle duct are provided in a common housing of the hot runner nozzle laterally next to one another. The housing encompasses at least one material recess, which divides the housing adjacent to the nozzle duct and adjoining to the heater into housing regions, which are spaced apart from one another.

Abstract: An improved nozzle for high melt pressure applications includes an inner body portion having a melt channel, the inner body portion having an inlet face and a melt outlet; an outer body portion having a seal face, with the outer body portion inducing a compressive force on the inner body portion at least during operation of the nozzle; the plane of the inlet face of the inner body portion intersecting the outer body portion, resulting in no part of the inner body portion extending beyond the seal face of the outer body portion; and the inner and outer body portions having different relative thermal conduction and expansion coefficients.

Abstract: In the case of an injection nozzle, in particular hot-runner nozzle (7), for arrangement in an injection mould (11) which has a relatively large number of plates as a function of the configuration, and which has, on its solid mould side (I), at least one platen (4) and one feed plate (5), and, on its mould side (II) at least one cavity plate (2), at the mould cavity (3) of which the nozzle point (8) is used, where the hot-runner nozzle (7) has been formed with a housing collar (11) and has been formed in a central material tube with a flow channel (9) for a material melt leading to the nozzle point (8), and has connections for a heating system (16) and/or cooling system and temperature sensor (17), the injection nozzle (7) has been incorporated into the injection mould (1) from the mould side (II) with sealing with respect to the feed plate (5).

Abstract: Disclosed is a hot-runner nozzle assembly, including: (i) a copper body having a copper alloy, and (ii) a reinforcement body being coupled with the copper body, the reinforcement body having a reinforcement alloy being configured to minimize thermal-expansion stress being induced between the copper alloy and the reinforcement alloy.

Abstract: A multi-cavity moulding process, using a moulding tool including an injection head integral with the injection press and a moulding assembly, the plastic material being injected under pressure and distributed in runners provided in the injection head which is equipped with heating elements, the moulding assembly including two mobile parts the assembly of which allows the mould cavities to be formed and the spreading of which allows the moulded parts to be ejected. The moulding assembly also includes a manoeuvring device that opens, closes and locks the mobile parts, where none of the mobile parts (30 and 40) of the moulding assembly is secured to the injection head, the moulding assembly coming into contact with the injection head and bearing on it only when it is closed in position and locked in order to fill the mould cavities.

Abstract: Disclosed is a valve-gated hot-runner system, having: (i) a back-up sealing arrangement, including: (i) a plurality of radial gaps associated with a valve stem of a valve actuator, and (ii) a cooling system being positioned relative to the plurality of radial gaps, the cooling system being configured to freeze a drool being made to enter, under pressure, into the plurality of radial gaps, so that the drool that becomes frozen substantially reduces flow of the drool along the valve stem and toward the valve actuator.

Abstract: An injection molding apparatus includes a first, rear-mounted nozzle that is coupled to a manifold for receiving a melt stream therefrom. A second, front-mounted nozzle is coupled to the first nozzle by a nozzle link that is provided between the first and second nozzles. A plurality of gate seals are coupled to a forward end of the second nozzle. The gate seals receive melt from a plurality of melt passages and deliver the melt to a plurality of mold cavities through respective gates. The second nozzle is slidably removable from the first nozzle via the nozzle link to facilitate repair or replacement of the gate seals.

Abstract: An injection molding hot-runner component comprising a tubular body defining a central passage and having an outer surface, an electrically insulated heater wire coupled to the tubular body, an external lead electrically connected to an end of the heater wire to form a connection, the external lead for connecting to an external power supply, and a terminal housing mounted to the outer surface of the tubular body, the connection of the external lead and the end of the heater wire being located within the terminal housing, wherein the connection extends in a plane that is generally parallel to tangential plane to the outer surface of the tubular body at the location of the connection.

Abstract: An injection molding system and injection molding method for making molded parts that include one or more planar heaters having a thin or a thick film resistive heater element coupled, secured, or releaseably secured to one or more sides of each of the one or more injection molding nozzles. The releasably secure coupling allows heater device to be visually inspected, tested, removed, and/or replaced. The planar heater device can have a support device patterned with a film electrical resistive path. The electrical resistive path can include any pitch or number of electrical resistance lines, such that a longitudinal uniform heat profile is generated along a melt flow channel of the one or more injection molding nozzles when the nozzles are in use. In some examples, the planar heater has more than one film resistive heater element that can be coupled to one or each side of a nozzle, with dielectric material interposed between the planar film resistive heater elements.

Abstract: The invention relates to a method and to a device for controlling/regulating the distribution of the injection molding compound in multi-cavity injection molds, especially for molds with a large number of cavities, for example 48 to 128 cavities. The invention distributes the injection molding compound in groups of, for example, four to twelve nozzles. Each group is provided with one classical nozzle, as the master nozzle, that is controlled via the local heating capacity and temperature sensors. All other nozzles or cavities of the same group are configured as slave nozzles that have no temperature sensors. The virtual actual temperatures are computed via saved model computations and are displayed on the user panel. The user is thus provided with the desired/actual temperature values for every nozzle and can thus influence every single nozzle, depending on the result, in the form of temperature values.

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: A shank system (10) for an injection molding nozzle (1) fitted with a heated injection material feeding pipe (3) itself comprising at its end a nozzle tip (5), said system comprising a main shank part (20), a thermally insulating spacer part (30) and a terminal shank part (40), the main shank part (20) and the spacer part (30) enclosing the injection material feeding pipe (3) while being a radial distance from it, the terminal shank part (40) subtending a recess (41) receiving in sealing manner the free end (4) of the injection material feeding pipe (3). At their end sides the main shank part (20), the spacer part (30) and the terminal shank part (40) are fitted with recesses (21, 31, 32) to receive at least one adjacent shank part (20, 30, 40). Before the fashioning of an external processing contour (K), they each are fitted with a solder repository (23, 33) receiving annular solder elements (24, 34) to solder to each other all three components (20, 30, 40).

Abstract: An injection molding apparatus includes a first nozzle having a first nozzle melt channel in fluid communication with a manifold melt channel, and a second nozzle having a second nozzle melt channel in fluid communication with the first nozzle melt channel. A nozzle link is provided between the first nozzle and the second nozzle and includes a nozzle link melt passage for fluidly coupling the first nozzle melt channel and the second nozzle melt channel. The second nozzle includes a plurality of outwardly extending melt passages in fluid communication with the second nozzle melt channel. The outwardly extending melt passages deliver melt to a plurality of mold cavities through a plurality of respective gate seals and mold gates. At least one shut-off valve is disposed within the second nozzle. The shut-off valve is associated with an outwardly extending melt passage and switchable between an open position and a closed position.

Abstract: The present invention is a nozzle for an injection molding runner system where parts of the nozzle, and in particular the nozzle tip are made from a nanocrystalline material. Nanocrystalline materials used include nanocrystalline copper and nanocrystalline nickel, which have high thermal conductivity and increased material strength. A conventional form of the metal is worked till its grains are reduced in size to less than 100 nm to achieve the desired properties.

Abstract: The present invention provides an improved apparatus and system for mixing castable polyurethanes and polyureas and for prolonging the dispensing time for dispensing them into a golf ball mold for application to a golf ball sub-assembly. A nozzle framework includes support housing heaters and heater adaptors for each dispensing port to delay the onset of drool and improve cut off in the dispensing tubes. The combination of fluorinated dispensing ports, the heating of the polyureas or polyurethanes, and inclusion of a capillary orifice in each dispensing port significantly prolongs the time before the advent of drool is detected.

Abstract: A method of manufacturing a resin molding according to the present invention is made by joining first and second resin molded parts. The method includes molding a concave portion when molding the first part, molding a convex portion which has a through-hole in a central portion thereof when molding the second part, mating the concave portion with the convex portion so that a cavity being in communication with one end of the through-hole is configured between the concave and convex portions, holding, with a jig, the first and second parts which the cavity is configured therebetween, connecting a tip of an injection nozzle for injecting a molten resin into the cavity with the other end of the through-hole, and filling the molten resin into the through-hole and the cavity from the injection nozzle so that the concave and convex portions are integrally joined by the resin.

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: An injection molding apparatus that includes a hot runner and a mold. The hot runner includes at least one nozzle that engages a nozzle-receiving cavity of the mold. The molding apparatus further includes a nozzle sleeve surrounding a portion of the nozzle and having a nozzle-sealing opening that receives the nozzle. The nozzle sleeve is movably secured to the hot runner or the mold so that when the mold is removed from the hot runner, the nozzle sleeve remains secured to the corresponding part of the apparatus. When the mold and hot runner are engaged with one another, the nozzle sleeve is springingly urged into sealing engagement with a sealing surface of the nozzle receiving cavity of the mold.

Abstract: An injector for injection-moulding of plastic materials including a generally cylindrical body, wound on the outside of which are at least two pairs of mutually independent electrical heating resistors and associated to which are respective control thermocouples.

Abstract: An injection molding apparatus includes a manifold having a manifold melt channel for receiving a melt stream of moldable material under pressure and at least one nozzle having a nozzle melt channel in fluid communication with the manifold melt channel. The nozzle has an opening that intersects with the nozzle melt channel, the opening having a central axis that is at an angle with respect to a central axis of the nozzle. A nozzle tip is coupled to the nozzle at one end of the opening. A valve pin bushing is coupled to the nozzle at an end of the opening opposite the nozzle tip. A valve pin extends through the opening. A primary actuator is connected to the valve pin. A nozzle locator piece is connected to the nozzle for mating with a side plate to locate the nozzle with respect to the mold gate.

Abstract: An injection molding machine nozzle capable of letting heat escape from a nozzle end portion and preventing the occurrence of cobwebbing with a simple structure. A heat conducting member is mounted on the nozzle end portion. When the end of the nozzle is contacted against a mold the heat conducting member also contacts the mold. The heat conducting member is composed of the material having heat conductivity equal to or greater than that of the nozzle. The heat of the nozzle end portion is conducted to the heat conducting member and released at the mold, thus preferentially cooling only melted resin of the nozzle end portion. Cobwebbing does not occur even when the mold is opened and the molded article is removed because the melted resin of the muzzle end portion has been cooled.

Abstract: An improved nozzle apparatus and method of manufacture are provided in which non-compatible components (such as a metallurgically non-weld-compatible nozzle tip and seal) may be secured/attached. For example, the apparatus and method may comprise securing a seal between a first portion of a nozzle tip and a retention ring. The retention ring may comprise a material that is weld-compatible with the nozzle tip and may be welded to the nozzle tip whereas the seal may be non-compatible with the nozzle tip. As a result, the materials of the nozzle tip and the seal may be chosen substantially without regard to their compatibility.

Abstract: A resin injecting apparatus includes a resin injecting nozzle for injecting a molten resin into a cavity configured between a first resin molded part and a second resin molded part connected to the first molded part, from a through-hole configured in the second molded part, and an ejection plunger for ejecting a predetermined amount of molten resin from the resin injecting nozzle. In addition, a thermal insulating bush is attached to the resin injecting nozzle, a coolant passage is formed in the thermal insulating bush and through which a coolant is passed, and a coolant supplying unit supplies the coolant to the coolant passage.

Abstract: The invention provides an injection molding nozzle or nozzle segment having a recessed terminal or terminal housing such that the radial profile of the nozzle or nozzle segment is reduced. Components of the nozzle or nozzle segment and injection molding apparatus having the nozzle or nozzle segment are also part of the invention.

Abstract: A nozzle for an injection molding apparatus includes a nozzle body having a first nozzle body segment, a second nozzle body segment and a third nozzle body segment. The second nozzle body segment is removably connected to at least one of the first nozzle body segment and the third nozzle body segment. The first nozzle body segment and the third nozzle body segment are heated either by first and second nozzle heaters, respectively, or by a heater sleeve having a cut-out along the length of the second nozzle body segment. The second nozzle body segment is substantially devoid of a nozzle heater such that the second nozzle body segment is heated passively through contact with the first nozzle body segment and the third nozzle body segment.

Abstract: A drop tip is provided for conveying injection molding material from a molding material supply into a mold. The drop tip has a body including an internal bore and a drop passage extending from the internal bore. The internal bore has an arcuate lower end terminating in a gate to prevent retention of molten material therein.

Abstract: A composite material component for an injection molding assembly includes a first portion formed of a precipitation hardened, high thermal conductivity material and a second portion formed of a precipitation hardened, high strength material, which are integrally joined together. The thermal conductivity of the high thermal conductivity material is greater than the thermal conductivity of the high strength material, and at least one strength aspect of the high strength material has a value greater than the corresponding value of the same strength aspect of the high thermal conductivity material. The high thermal conductivity material and the high strength material can be precipitation hardened together under the same precipitation hardening conditions to achieve increases in the value of at least one strength aspect of the high thermal conductivity material and the value of at least one strength aspect of the high strength material, relative to their respective unhardened conditions.

Abstract: A valve pin bushing for a hot runner includes a bushing body having a hole therethrough for receiving a valve pin and a rearward surface for contacting a back plate. A thermally insulative component is coupled to a forward surface of the bushing body. The thermally insulative component is made of a nonmetallic material having a thermal conductivity lower than that of the bushing body.

Abstract: An air ring is provided for a stripper plate assembly. The air ring is removably situated within bores defined in the stripper plate. An air manifold is also defined within the stripper plate, which is connected to a pressurized air source for communication of a pressurized air flow to each of the bores air ducts within each air ring direct the pressurized air flow from the air manifold towards a preferred location on the molded article that passed through the air ring.

Abstract: An injection molding system having a manifold nozzle connection that accommodates thermal expansion of the system. A manifold nozzle tubular connector is receivable at a first end within a manifold and at a second end within a nozzle and has a length that bridges a space between opposing surfaces of the manifold and nozzle. The first end of the tubular connector may be threadably and/or permanently attached within a manifold bore in a downstream surface of the manifold with the second end of the tubular connector being slidably received within a nozzle bore in an upstream surface of the nozzle or within a nozzle melt channel. Alternatively, the first end of the tubular connector may be slidably received within a manifold bore in the downstream surface of the manifold or within a manifold melt channel with the second end of the tubular connector being threadably and/or permanently attached within a nozzle bore in an upstream surface of the nozzle.

Abstract: An improved nozzle for high melt pressure applications includes an inner body portion having a melt channel, the inner body portion having an inlet face and a melt outlet; an outer body portion having a seal face, with the outer body portion inducing a compressive force on the inner body portion at least during operation of the nozzle; the plane of the inlet face of the inner body portion intersecting the outer body portion, resulting in no part of the inner body portion extending beyond the seal face of the outer body portion; and the inner and outer body portions having different relative thermal conduction and expansion coefficients.

Abstract: The present invention provides an electrically heated nozzle for injection molding which is insulated to prevent conduction of electricity and loss of thermal transmission to the casing, wherein at least a part of the electrical insulation comprises a layer of dielectric insulator material with an electrical resistance wire wound spirally thereabout and another dielectric insulator layer thereover. Also disclosed is a method for making such a nozzle which includes the steps of applying a first insulator layer, winding electrical resistance wire about the first insulator layer, applying a second insulator layer, and applying a casing layer thereover. The first and second insulating layers may be provided by spraying or through telescoping, self-supporting sleeves.

Abstract: A cylindrical switch has one or more passages which open onto a lateral cylindrical surface of the switch. The switch is capable of being tightly received in a cylindrical hole in a hot plate and of being selectively orientated so that the passages are angularly in line with or offset from two or more channels in the hot plate which open onto the hole in order to selectively permit, interrupt or divert the flow of molten plastics material between the aforesaid channels. The switch incorporates a circuit for a cooling fluid.

Abstract: An injection molding apparatus that includes a hot runner and a mold. The hot runner includes at least one nozzle that engages a nozzle-receiving cavity of the mold. The molding apparatus further includes a nozzle sleeve surrounding a portion of the nozzle and having a nozzle-sealing opening that receives the nozzle. The nozzle sleeve is movably secured to the hot runner or the mold so that when the mold is removed from the hot runner, the nozzle sleeve remains secured to the corresponding part of the apparatus. When the mold and hot runner are engaged with one another, the nozzle sleeve is springingly urged into sealing engagement with a sealing surface of the nozzle receiving cavity of the mold.

Abstract: A nozzle 10 used in injection molding comprises at least one runner 30 within a nozzle casing 20 to convey injection material to be processed. At its lower end, the runner 30 communicates, in flow-transmitting manner, through a nozzle orifice element 40 and an insert 50, with an injection mold cavity constituted by at least one mold insert 12, 13. The insert preferably is made in powder metallurgy form of a wear-resistant material and is configured in limited longitudinally displaceable manner in the nozzle orifice 40 in the lower end of the runner 30. Said insert 50 furthermore constitutes a gate aperture 18. In the embodiment mode of a needle shutoff nozzle 10, a shutoff needle 60 displaceable between an open and a closed position passes through the runner 30 and through the insert 50 which constitutes a centering element wherein an intake cone 54 centers the intrinsic sealing element 65 of the needle 60.

Abstract: A composite nozzle tip for an injection molding assembly includes a body, having a bore extending therethrough, adapted for connection to the injection molding assembly. The body is formed of a precipitation hardened, high thermal conductivity material and a precipitation hardened, high strength material, which are integrally joined together to form the body. The thermal conductivity of the high thermal conductivity material is greater than the thermal conductivity of the high strength material, and the strength of the high strength material is greater than the strength of the high thermal conductivity material. The high thermal conductivity material and the high strength material can be precipitation hardened together under the same precipitation hardening conditions to achieve increases in the value of at least one strength aspect of the high thermal conductivity material and the value of at least one strength aspect of the high strength material, relative to their respective unhardened conditions.

Abstract: A hot runner assembly for an injection molding assembly includes an injection unit adapted to contain a flowable material, a manifold having a first segment of a melt channel formed therein, a nozzle assembly connected to the manifold including a nozzle housing and a nozzle tip, a retainer that retains the nozzle tip against the nozzle housing, and a mold cavity. The nozzle tip is formed of a precipitation hardened, high thermal conductivity material and a precipitation hardened, high strength material, which are integrally joined together to form the body. The thermal conductivity of the high thermal conductivity material is greater than the thermal conductivity of the high strength material, and the strength of the high strength material is greater than the strength of the high thermal conductivity material. The high thermal conductivity material and the high strength material can be precipitation hardened together under the same precipitation hardening conditions.

Abstract: An injection apparatus has a cylinder member having a feed opening (215) formed at a predetermined position; an injection member disposed within the cylinder member in a manner capable of advancing and retreating; a molding-material feed apparatus which attached to the feed opening (215) and feeds a molding material into the cylinder member through the feed opening (215); and thermoelectric cooling elements (261) to (264) disposed at predetermined positions around the feed opening (215). Since the thermoelectric cooling elements (261) to (264) are disposed at the predetermined positions around the feed opening (215), temperature around the feed opening (215) can be brought to an appropriate value, and the response of temperature control can be enhanced.

Abstract: A composite material component for an injection molding assembly includes a first portion formed of a precipitation hardened, high thermal conductivity material and a second portion formed of a precipitation hardened, high strength material, which are integrally joined together. The thermal conductivity of the high thermal conductivity material is greater than the thermal conductivity of the high strength material, and at least one strength aspect of the high strength material has a value greater than the corresponding value of the same strength aspect of the high thermal conductivity material. The high thermal conductivity material and the high strength material can be precipitation hardened together under the same precipitation hardening conditions to achieve increases in the value of at least one strength aspect of the high thermal conductivity material and the value of at least one strength aspect of the high strength material, relative to their respective unhardened conditions.

Abstract: Disclosed is a molding system.

Abstract: A series of injection molding nozzle tips having a novel inner insert. The novel inner insert in accordance with the embodiments of the present invention includes a finned profile having flow channels between the finned sections. The finned profile and its associated flow channels cause the flow of molten plastic in the nozzle to go through a breakup into the flow channels before it is merged at the nozzle flow exit. This breaking up of the molten plastic flow and its merging insures a better mixing of the molten plastic and also reduces stresses within the molded part.

Abstract: A nozzle end is provided for removable mounting to a nozzle body for use in multiple-tipped molding applications such as edge-gated systems. The nozzle end is made of a highly thermally conductive material and is preferably inserted at least partially inside the forward end of the heated nozzle body. Removable nozzle tips are insertable in the front end of the nozzle end.