Abstract: The present invention relates to an injection unit of a two-stage injection molding machine having an injection device and a meter device for providing plastic to the injection device. The injection motor of the injection device is secured to the base and does not move along with the injection linkage member so as to decrease the movement momentum and improve the injection response and acceleration capability. Additionally, the injection device can adopt a plurality of injection motors for meeting the injection capability requirement without employing high power injection motors. The length of the injection molding machines is relatively shortened, thus the problem of the prior arts is solved.

Abstract: Apparatus and method whereby coinjection molding shooting pot actuation structure is configured to be installed in a coinjection hot runner with a coinjection nozzle, the coinjection nozzle having at least two melt channels ending at the same gate. The shooting pot is preferably disposed in one of a mold cavity half and a mold core half. A shooting pot piston is configured to discharge a melt from the shooting pot. A transmission structure is configured to (i) extend through one of the mold cavity half and the mold core half, and (ii) to transmit a force to the shooting pot piston. Actuation structure is disposed on the opposite side of the mold cavity half from the coinjection hot runner, and is configured to provide the force to the transmission structure. This configuration conserves space in the mold.

Abstract: A method for forming a turbine or compressor wheel from a semi-solid material uses a die assembly that has an inner cartridge made up from a plurality of segments and an outer die. The semi-solid material is injected under pressure and high temperature into the die so that it flows into blade cavities defined between the segments of the cartridge. The cartridge is removed from the outer die and the segments are then separated to release the wheel.

Abstract: A method of making shaped articles from highly condensed polyester melt and especially preforms for the blow molding of food and especially beverage containers. A melt is continuously withdrawn from the polycondensation reactor and is fed to the shape-imparting units, especially a multiplicity of injection-molding machines without solidification between the final reactor and the injection molders and without degassing between the final reactor and the injection molding machines.

Abstract: Embodiments of the present invention relates to an injection moulding machine or injection unit and to an injection moulding method for injection moulding plastic materials (e.g., elastomeric materials), particularly according, to cold channel and hot channel techniques, comprising an extruder, a first piston/cylinder unit and a second piston/cylinder unit mounted in series thereto. The cylinder of the first piston/cylinder unit leads into the end of the second piston/cylinder unit located at a distance from an injection mould to be filled. According to an aspect of the invention, the elastomeric material is firstly led by means of the first piston/cylinder unit through the cylinder of the second piston/cylinder unit and into the injection mould, wherein the piston of the second piston/cylinder unit frees the flow path to the injection mould.

Abstract: An apparatus for injection molding includes at least one mold part having at least one surface. The mold part has at least one shaped portion. At least one substantially closed cavity region is disposed within the at least one surface. The one cavity region is designed for molding at least part of an interstitial mass. The apparatus further includes at least one gate disposed on the at least one surface for providing fluid communication to the at least one cavity region and at least one flow restrictor positioned on the mold part for initially directing flow of the interstitial mass to the at least one shaped portion. In one embodiment, flow restrictors initially direct the interstitial mass to an upper portion of the shaped portion.

Abstract: A hot runner system includes a having a cavity. Melt is fed from a source of melt into the cavity, and a valve isolates melt in the cavity from melt in the source. A plunger within the cavity is driven forward to inject melt in the cavity into a mold cavity at high pressure without significantly increasing the pressure of melt in the source. The plunger optionally functions as both the plunger and the valve by opening and closing communication between the cavity and the manifold as it is rotated.

Abstract: A mold for a use of making a fuel cell separator comprises: a first flow path forming portion to form a cooling medium flowing path, or to form an oxidizing gas flowing path, or to form a fuel gas flowing path; and an injection gate to shoot out a forming material settled on the first flow path, and/or disposed at near place with the first flow path.

Abstract: In one embodiment, a molding system for creating a molded-in-color panel has a first mold member with a first forming surface for forming a portion of a panel with an exposed surface. The molding system has a second mold member having a second forming surface for forming a concealed portion of the panel. One of the first and second mold members is translatable relative to the other to collectively receive a heated molded-in-color resin to form the panel. The molding system has an injector for injecting molded-in-color resin into the mold. The second forming surface is sufficiently smooth so that the exposed surface of the panel is free of visible flow lines.

Abstract: An injection molding apparatus includes a first mold half, a second mold half opposite to the first mold half, an eject pin, a component collector and a buffer device. The eject pin penetrates through the first mold half. The component collector is configured for receiving the molding component molded. The buffer device includes a buffer plate, a connection plate and an elastic element. The elastic element includes two elastic arms connected with each other. The two elastic arms form an angle ? in a range 0°<?<180° in its natural state and partly inserting into the buffer plate and the connection plate respectively. The buffer device is disposed at a same side as the first mold half and the buffer plate is adjacent to the second mold half. The buffer device is configured for buffering the molding component during a knockout process.

Abstract: Disclosed is: (i) a molding-system valve, (ii) a molding system having a molding-system valve, and/or (iii) a method of a molding-system valve, amongst other things.

Abstract: In an injection device 10 having a plunger 11 reciprocably inserted into a heating cylinder 16, in which a molten material M is injected by the plunger 11 via a nozzle 21, a sealing portion 13 set so that the molten material M is prevented from easily entering a gap A between the plunger 11 and an inner wall 32 of the heating cylinder 16 is provided on the portion of the plunger 11, on the side of the nozzle 21, and the portion of the sealing portion 13, on the side of the nozzle 21 is a core keeping portion 14 provided so that an annular portion 20 which is formed on a front portion of the plunger 11 and is connected to a storage portion 19 of the molten material M is formed between the core keeping portion 14 and the inner wall 32 of the heating cylinder 16.

Abstract: An injection molding three way shut off valve assembly and method in which the three way valve assembly is configured to be disposed to control a flow of a molten material from an injection unit to a runner system. Preferably, the valve assembly has a valve plunger configured to be disposed between the injection unit and the runner system; the valve plunger having a flow-through channel and a purge channel. Movement structure is configured to control the position of the valve plunger between (i) a molten material flow position where the molten material flows through the flow-through channel, (ii) a molten material blocked position where the molten material is blocked from flowing through the flow-through channel, and (iii) a molten material purge position where the molten material flows through the purge channel, without disconnecting the injection unit from the runner system.

Abstract: An injection molding machine includes an injection pot with an injection nozzle and a side casting port for feeding a material into the pot. The tip part of a plunger disposed in the pot is formed in such as shape that the tip part of the injection pot can be generally filled with the material after an injection is completed. A fitting part pressingly cuts off the material from the feeder by allowing a boundary part between the plunger body and its tip to be formed at a corresponding part between the injection pot body and its tip part.

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: The present invention relates to a non-return valve that can be configured for use anywhere along a molding material flow path in a molding system. The non-return valve of the present invention includes an improved means to restrict the backflow of melt therethrough during injection. In particular, a spigot-seal is configurable, during injection, between overlapping, closely-spaced, and mutually parallel complementary male and female spigot portions that are configured between complementary valve members. The spigot-seal advantageously maintains an effective backflow restriction even in the eventuality of transient movement between the spigot portions during injection. Preferably, the non-return valve of the present invention is also configured to include a means for mutually aligning and/or guiding the complementary valve components that ensures a proper alignment between the complementary spigot portions, and may also serve to improve the function and longevity of a face-seal, when present.

Abstract: A system is provided for forming solid ink sticks comprising a molten ink delivery station for introducing molten ink material into a forming tub to form a solid ink stick. The forming tub includes an open top for receiving the molten ink material and a cavity defining a lower portion of a solid ink stick shape. The system includes a top surface conditioning station for altering the top surface of the ink material introduced into the cavity of the forming tub.

Abstract: Disclosed herein is a metallic alloy slurry dispenser. The dispenser includes a dispensing body that defines an outlet. The dispenser also includes an outlet cover that cooperates with the outlet, and the outlet cover is configured to cooperate with the outlet more than once. The metallic alloy slurry dispenser may be used in any one of a metallic alloy slurry molding machine, a metallic alloy slurry molding assembly, a metallic alloy slurry hot runner assembly and any combination thereof.

Abstract: An injection molding apparatus for injecting resin into a mold comprises an injection cylinder in fluid communication with the mold, wherein movement of a piston relative to the cylinder injects a selected quantity of resin into the mold. A plasticizing unit includes a flighted screw rotating in a heated containment barrel for plasticizing resin. The plasticizing unit is in fluid communication with the injection cylinder for supplying the injection cylinder with plasticized resin. A valve is provided for selectively placing the injection cylinder in fluid communication with the mold and placing the plasticizing unit in fluid communication with the injection cylinder, wherein the valve exerts pressure on resin in the mold independently of the injection cylinder or plasticizing unit. The valve is actuated by relative movement between the mold and one of the injection cylinder and the plasticizing unit.

Abstract: An injection molding machine is provided including a first mold portion and a second mold portion, the second mold portion being movable relative to the first mold portion and together defining a mold cavity. The injection molding machine includes a fluid path extending through the first mold portion. The fluid path has an inlet fan gate portion in fluid communication with the mold cavity. The injection molding machine further includes a valve device disposed in the fan gate portion directly adjacent the mold cavity. The valve device is positionable in an opened position to permit flow of the molding material from the fan gate portion to the mold cavity and a closed position to obstruct flow of the molding material from the fan gate portion to the mold cavity. In the closed position, the valve device defines a wall surface portion for forming the molded part and thereby eliminating the need for a post-machining operation to remove the gate portion.

Abstract: Disclosed is: (i) a molding-system valve, (ii) a molding system having a molding-system valve, and/or (iii) a method of a molding-system valve, amongst other things.

Abstract: Coinjection molding shooting pot cooling apparatus and method are configured to cool a shooting pot cylinder which, in combination with a shooting pot piston, injects a melt through a coinjection nozzle having at least two melt channels ending at the same gate. Preferably, a heat sink sleeve is disposed to contact an outer surface of a rear portion of the shooting pot cylinder. The heat sink sleeve is configured to remove sufficient heat from the shooting pot cylinder to increase the viscosity of the melt therein, thus reducing melt leakage between the shooting pot piston and the shooting pot cylinder.

Abstract: A device for expansion injection moulding, by which a polymer melt placed under pressure by a main pressure source can be injected from a storage chamber (4) into a mould cavity (3) by expansion of the polymer melt stored under pressure, the injection is optionally assisted by elastic deformation of the wall (8) of the storage chamber (4) and/or the wall (7) of a runner 6 leading to the storage chamber (4), the storage chamber (4) having an exit (5) which can be shut off, wherein the storage chamber (4) is arranged in a mould (1) which forms the mould cavity (3) and an additional pressure accumulator and/or an additional pressure source is (are) provided which is (are) capable of exerting additional pressure on the polymer melt during injection of the polymer melt into the mould cavity (3), in order to fill—preferably completely—the mould cavity (3).

Abstract: A vertical micro-injection machine includes a plasticizing unit, in which a feeding channel is provided and a screw or a plunger for transporting the molten material is provided in the feeding channel; an injection unit adapted to receive a metered amount of molten material from the plasticizing unit; an injection mold adapted to receive the metered amount of molten material from the injection unit; at least two thrust cylinders adapted to close the injection mold before injection and open the injection mold after injected parts solidified; and the injection unit includes an injection cylinder, the injection cylinder is connected with the feeding channel of the plasticizing unit, and a vertically reciprocating plunger is provided in the injection cylinder, which can expel air above the molten material in the injection cylinder by its upward advancement and then push the molten material into the injection mold.

Abstract: Molding apparatus for rapid transfer of molten resin or pitch in an infiltration molding process. The apparatus includes e.g. an extruder (4) for melting and conveying a resin or pitch and a mold (10) arranged so that resin or pitch is conveyed to a mold insert cavity (19) within the mold. The mold insert contains an internal protrusion such as a locating ring (25) for positioning a porous body (1, 18) within the mold insert cavity in a position that brings about unidirectional flow of the molten resin or pitch through the porous body. Also, rapid resin or pitch infiltration molding process that includes injecting a high melting point, high viscosity, molten resin or pitch into the mold to effect a unidirectional impregnation of a heated preform via a pressure gradient in the mold.

Abstract: An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is located at a forward end of the piston to selectively block communication between a recess, which is provided in an outer wall of the piston adjacent the valve, and a melt chamber of the nozzle. Movement of the injection piston from the retracted position to the extended position causes the valve to close so that the predetermined volume of melt located below the valve is forced into the mold cavity, when the valve gate pin opens the mold gate.

Abstract: A resin transfer molding (RTM) process is disclosed for rapidly filling a fibrous preform and/or a rigid, porous body with high viscosity resin or pitch. The process is suitable for impregnated multiple porous bodies stacked in a single mold. The process uses a fibrous preform or rigid porous body which is placed into a mold matching the desired part geometry. A resin is injected into the mold at temperature and pressure. After cooling, the infiltrated component is removed from the mold. The mold is constructed from two halves fitted to form at least one mold cavity. A gate fitted with a nozzle is set into one of the mold halves, and a valve admits resin or pitch into the gate area. Venting or vacuum can be applied to the mold. The mold is held in a hydraulic press and an extruder, optionally fitted with an accumulator, supplies molten resin or pitch to the mold.

Abstract: An injection unit for an injection molding machine includes a plasticizing unit in the form of an extruder, a plunger-type injection device, which can be connected to the injection molding machine by an injection nozzle. The plunger-type injection device defines an injection space. The extruder has a forward portion which is connected to the injection space by a melt through channel in which a shutoff valve is disposed. The extruder is operated continuously and includes one or more plasticizing screws, wherein the extruder is configured in such a way that the backup length can expand backwards into the extruder, when the shutoff valve is closed.

Abstract: An injection molding sealing apparatus configured to be installed in a coinjection hot runner with a coinjection nozzle, the coinjection nozzle having at least two melt channels ending at the same gate. The sealing apparatus is configured for sealing the coinjection hot runner to a hot runner sprue bushing, which is coupled to an injection assembly, during relative movement between (i) the coinjection hot runner and (ii) a stationary mold or machine section. Sealing structure is configured to seal the coinjection molding hot runner sprue bushing to the coinjection hot runner during the relative movement. Coupling structure is configured to provide relative movement between the injection assembly and the stationary mold or machine section.

Abstract: A two-stage injection molding machine having a pressure sensor device is proposed. The two-stage injection molding machine includes an injection part having an injection cylinder, a driving unit, and an injection rod installed in the injection cylinder; a metering part for feeding plastic material to the injection cylinder of the injection part; and a loadcell installed between the injection rod and the driving unit, wherein pressures in the injection cylinder during the feed metering, injection, and packing processes are detected via the loadcell and the pressure sensor rod. As a result, an accurate pressure feedback control is implemented to achieve high precision injection molding quality. And with the two-stage injection molding machine having such a simple structural design, occurrence of signal distortion and delayed response is prevented.

Abstract: A three level stack mold machine comprising a machine frame, a fixed platen mounted on the frame, guide rails mounted on the frame, a movable platen mounted on the guide rails and two carriages mounted on the guide rails between the fixed platen and the movable platen. A hot runner plate is mounted on the fixed platen and water manifolds are mounted on each carriage assembly. Each manifold has water connectors extending upwardly therefrom. A hot runner plate is mounted on each manifold and connected to a first group of the water connectors. A core plate is mounted on the movable platen and connected to water connectors extending upwardly from a water manifold attached to the movable platen. Core plates are mounted on the hot runner plates on the carriage assemblies. The core plates have water connectors on a bottom surface thereof connected to a second group of the water connectors. Cavity plates are mounted on the hot runner plates and connected to hot runner nozzles extending out of the hot runner plates.

Abstract: A mold valve assembly includes a mold valve chamber having an output port and an injection chamber in communication with the mold valve chamber. A first actuator drives an injection piston within the injection chamber to drive mixture material from an inlet port into the mold valve chamber. A second actuator drives a mold valve piston along the mold valve axis within the mold valve chamber to drive mixture material through an outlet and into a mold cavity of a mold assembly. The mold valve piston closely fits within the mold valve chamber to scrape along an end segment of the injection piston to clean any mixture material remnants therefrom such that remnants within the mold valve chamber are minimized and the necessity of flushing between injection cycles is substantially eliminated.

Abstract: Devices, systems, and methods for monitoring the operation of an injection molding machine, for example, a wax injection molding machine, are disclosed. The devices, systems, and methods may be used for injection molding machines having an injection die, a molding medium injection cylinder, and a control cylinder coupled to the injection cylinder, the control cylinder having a fluid supply conduit. Monitoring and/or control are practiced by monitoring the fluid pressure and the flow rate of the fluid in the conduit. This flow rate and pressure are used to calculate the fluid pressure and flow rate of the molding medium injected into the injection die. A data acquisition system may be used to calculate and output the calculated data. The system can be portable and adaptable for use with any type of injection molding machine and for any injection molding medium.

Abstract: An injection molding device includes a continuously operating extruder and a discontinuously operating injection unit receiving plastic material from the extruder. The extruder has an extruder barrel which includes a plasticizing zone and a discharge zone, whereby the discharge zone is configured to provide an intermediate storage space and has a cross sectional area which is greater than a cross sectional area of the plasticizing zone. In this way, the discharge zone provides a buffer volume which is filled during the injection process and then emptied again.

Abstract: Resin or pitch is melted in a melt blender apparatus (11) and then loaded, into a heated jacketed holding tank (12). A pair of feed lines (14, 16) receives resin from the holding tank (12) and feeds an upper gear pump (15) and a lower gear pump (17). A mixing enhancement such as a static mixer (18, 19) is located in each of the feed lines (14, 16) between the gear pumps (15, 17) and the resin delivery ends (25, 26) of the feed lines. The resin-melt feed lines may be equipped with pressure indicators (27, 28, 32, 34) and pressure relief valves (23, 24). The resin-melt feed lines may also be equipped with pump accumulators (31, 33). Resin melt pressure created by the gear pumps (15, 17) forces a piston inside the accumulator back to the desired position. The accumulators (31, 33) can also be used to maintain constant pressure in the feed stock. Resin can be recycled from the accumulators (31, 33) into the melt blender (11).

Abstract: A machine for processing individual food items comprises a mold plate having multiple longitudinally spaced transverse rows of cavities. The mold plate slides such that the rows of cavities sequentially communicate with a fill slot in a fill plate. Bulk food material fills the cavities and displaces air from them into a breather plate. The breather plate has one or more longitudinal grooves in a working surface. The fill plate has one or more longitudinal grooves in a working surface that communicate with the atmosphere. One or more vent holes in the mold plate communicate with the breather plate and fill plate grooves for all positions of the mold plate at which food material is filling a row of cavities. No air is trapped in the breather plate, and there is no buildup of air pressure that could create a friction force between the mold plate and the fill plate.

Abstract: A metering device for an injection molding unit includes a base body having an antechamber in fluid communication with a feed channel for introduction of plastic material, and a metering chamber in fluid communication with a injection channel. The antechamber and the metering chamber are connectable with one another by a closeable passageway. Movably arranged in the base body between the antechamber and the metering chamber is a displacement member in the form of a piston to separate the antechamber and the metering chamber. The piston has a first end face which demarcates the antechamber and a second end face which demarcates the metering chamber, with the first end face defining an effective area which is smaller than an effective area of the second end face.

Abstract: A low-pressure mold valve assembly includes a coupler to removably attach a mix head to a mold assembly in an assembly line environment. A first piston which is rectilinear in cross section is movable within the first flow passage along a first axis by an actuator. A second piston is movable along a second axis substantially perpendicular to the first axis by a second actuator. After injection is complete, the second piston seals a mix chamber of the mix head while remnants of the matrix that remain in a flow passage are driven into the first flow passage by the piston. The first piston is then driven toward the mold port such that matrix remnants are further driven into the mold cavity. The coupler is thus cleared of remnants without flushing.

Abstract: Apparatus for manufacturing a multicolor slide fastener includes an upper die 110, a lower die 120, and a plurality of unit fastening teeth-forming slots 101 formed in a lengthwise direction. Molding material-injecting passages and a plurality of sprue holes 102 are provided for injecting the molding materials S into the slots 101. Inclined passages 201 and 202 are connected to the molding material injecting passages respectively, for carrying the molding materials S from a raw material source. Heaters 240 and heat sensors 241 heat the passages 201 and 202. Pressing means 300 press the molding materials S into the inclined passages 201 and 202. Valves 400 control injection of the molding materials S into the sprue holes 102 of the upper die 110.

Abstract: The invention provides a blowing agent delivery system for introducing a blowing agent into a polymeric foam processing system. The delivery system is designed to discontinuously introduce blowing agent from a continuous source into polymeric material within an extruder. The system, thus, may improve control over blowing agent delivery in discontinuous polymer processing systems such as injection molding or blow molding. In some embodiments, the blowing agent delivery system selectively directs blowing agent flow from the source to the extruder barrel, or through a bypassing passageway. In this manner, blowing agent may be continuously supplied by the source but discontinuously injected into the extruder barrel. During use, the delivery system may cause blowing agent to flow through the bypassing passageway, for example, when the screw stops plasticating polymeric material.

Abstract: An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is located at a forward end of the piston to selectively block communication between a recess, which is provided in an outer wall of the piston adjacent the valve, and a melt chamber of the nozzle. Movement of the injection piston from the retracted position to the extended position causes the valve to close so that the predetermined volume of melt located below the valve is forced into the mold cavity, when the valve gate pin opens the mold gate.

Abstract: In a compounder-type injection molding machine having an extruder for continuously producing a melt and at least one injection device is fluidly connected to the extruder to receive melt, a reservoir is provided which is in fluid communication with the extruder as well as with the injection device for temporary storage of melt. In order to maintain a pressure at a desired level at the outlet of the extruder, a pressure sensor is provided for ascertaining a melt pressure state downstream of an outlet of the extruder. The pressure sensor outputs a signal, commensurate with the melt pressure state, to a control unit for activating a drive in the reservoir or a drive in the injection device in response to the signal according a predetermined algorithm.

Abstract: A molding method for resin long body to make a thin long body of resin. Molten resin is supplied to a spaced portion of a mold through a thin film gate after a resin well of enlarged hollow ring is filled with the molten resin through plural pin runners in advance.

Abstract: An injection assembly for an injection molding machine, with a continuously operating plasticizing unit, includes a piston-type injection unit and an arrangement for intermediate storage and discharge of melt. Several melt reservoirs with melt inlet openings are provided between the plasticizing unit and the piston-type injection unit. Melt lines that connect the melt reservoirs with each other and with the plasticizing unit extend to the melt inlet openings. The melt reservoirs include actuatable work pistons for discharging the melt, wherein the work pistons can open and close the melt inlet openings in the melt reservoirs to divert the melt flow. The disclosed injection unit increases the total volume of bufferable melt and allows individual and separate adjustment of the reservoir volumes and the discharge velocity of the individual melt reservoirs. In addition, switching valves can be eliminated since the melt flow is switched by the work pistons.

Abstract: The object of the present invention is to provide a traction type electric injection molding machine requiring only one electric motor for mold clamping and only one rotational transformer, with a mold clamping apparatus installed on the top of a bed and between the front and rear ends of the bed, and with an injection apparatus installed between them. A fixed platen 21 and a supporting platen 22 are mounted oppositely on a bed 1 and connected by tie bars 30 backward and forward. Traction rods 23 insert through the platens 21 and 22, from which their ends protrude. The tip ends of the traction rods 23 carry a movable platen 24, which can be moved toward and away from the fixed platen 21. The rear ends of the traction rods 23 carry a traction plate 25. A mold clamping apparatus 2 includes a motion transformer 29, which includes a screw shaft 26 and a nut 28. The screw shaft 26 fixed to the traction plate 25.

Abstract: A form, fill and seal packaging machine for forming, filling and sealing a carton, molds a closure directly onto the carton. The machine includes a carton erection station adapted to receive a carton in a generally flat form and to erect the flat form carton into a tubular form defining an internal carton region. A direct injection molding station has an internal mold tool and an external mold tool. The internal mold tool is configured for receipt within the internal carton region and the internal mold tool and the external mold tool are configured to receive and clamp the carton therebetween. The direct injection molding station further includes a polymer injection system for injecting polymer from a location external of the carton to the internal mold tool. The closure is directly molded in place on the carton. A mold tool set, a method for carrying out the molding and a closure molded thereby are also disclosed.

Abstract: An injection unit for an injection molding machine includes a barrel and a plasticizing screw received in the barrel. An electromotive rotary drive causes the plasticizing screw to rotate and is supported for joint movement with the plasticizing screw in relation to the barrel in direction of an injection stroke. The plasticizing screw and the rotary drive are moved by an electromechanical injection stroke drive to execute the injection stroke. A linear guide is connected to a machine bed for guiding a longitudinal movement of the injection stroke drive and the plasticizing screw. Misalignment of the coaxial disposition of the plasticizing screw, the rotary drive and the injection stroke drive is eliminated by providing a housing shell which is torsionally stiff and moveably accommodates the rotary drive, wherein the plasticizing barrel and the injection stroke drive are connected by the housing shell in a tension-proof manner and supported via the housing shell on the linear guide for longitudinal movement.

Abstract: An injection molding apparatus for injecting resin into a mold comprises an injection cylinder in fluid communication with the mold, wherein movement of a piston relative to the cylinder injects a selected quantity of resin into the mold. A plasticizing unit includes a flighted screw rotating in a heated containment barrel for plasticizing resin. The plasticizing unit is in fluid communication with the injection cylinder for supplying the injection cylinder with plasticized resin. A valve is provided for selectively placing the injection cylinder in fluid communication with the mold and placing the plasticizing unit in fluid communication with the injection cylinder, wherein the valve exerts pressure on resin in the mold independently of the injection cylinder or plasticizing unit. The valve is actuated by relative movement between the mold and one of the injection cylinder and the plasticizing unit.

Abstract: An injection molding machine 10 utilizes a two part mold to produce a molded part. A machine includes a clamping mechanism 20 including one or more clamping cylinders 22 for applying a mold clamping force to the two part mold, an injection mechanism 30 for plasticizing material and injecting the plasticized material into the closed mold, and a controller 50 for powering the molding machine hydraulic system 52. In one embodiment, clamping pressure is automatically increased or decreased to allow air to escape as plasticized material flows into the mold cavity. In another embodiment, the controller provides a minimum clamp pressure to maintain the plasticized material within the mold as a function of fluid injection pressure to the screw member of the injection system.

Abstract: An object of the present invention is to provide an injection apparatus capable of enhancing efficiency, reducing size, and enhancing durability of an injection member. The injection apparatus includes an injection member disposed reciprocatably in a cylinder member, a linear motor device (49) for advancing the injection member when operated, a metering member disposed rotatably in the cylinder member, and metering drive means for rotating the metering member. In this case, in an injection step, the linear motor device (49), when operated, can directly advance the injection member to thereby perform injection; therefore, occurrence of energy loss can be prevented. As a result, the efficiency of the injection apparatus (43) can be enhanced.