Abstract: An injection molding machine for simultaneously injection molding a plurality of articles each made of plural polymeric materials. The injection molding machine includes a source of a first polymeric material and a source of a second polymeric material. The injection molding machine also includes a plurality of co-injection nozz;es, each of the nozzles has na associated injection cavity mold. Each of the nozzles also has a first flow channel for providing a stream of said first polymeric material to said mold and a second flow channel for providing a stream of said second polymeric material to said mold. The machine further includes a flow control device for feeding the polymeric materials from their sources to each of the nozzles and each of the associated molds, such that each of the streams of the first polymeric materials flows from each nozzle into each associated mold simultaneously and each of the streams of the second polymeric materials flows from each nozzle into each associated mold simultaneously.

Abstract: Mold bushings or nozzles for gas-assisted injection molding processes are disclosed. The devices include movable shut-off mechanisms which selectively facilitate or prevent the passage of molten plastic material into mold cavities. One or more apertures, such as holes, openings, channels, slits, slots, and the like, are provided at or adjacent the end of the pin members or at the end of the devices. The apertures are thin or small and have dimensions which will allow the passage of gas and at the same time prevent the plastic material from plugging or clogging them.

Abstract: One or several molten materials are extruded at low pressure from one or several continuous plasticizers through central stationary nozzles via individually circumferential flow passages of common distribution spools directly into individual extendable transfer reservoirs. From there, the molten materials are transferred in a continuous cascading manner into secondary transfer reservoirs to be subsequently transferred and condensed within mold cavities into finished molded articles. The central stationary nozzles and stationary primary displacement plugs are grooved with lateral longitudinal melt-flow channels to allow the conveyance of molten materials across intersecting molten material passage ways during the extending movement of the manifold assembly. The molten materials are conveyed through secondary displacement plugs into secondary transfer reservoirs by external cylinders, retracting the manifold assembly on adjustable-length spacer rods in unison against the stationary primary displacement plugs.

Abstract: A multiple limbed component is molded in a gas injection mold with a corresponding number of outlets. The outlets are regulated by valves that are operated sequentially to permit progressive expulsion of the excess material in the mold cavity.

Abstract: A gas nozzle for a gas assisted injection molding system includes a body having an inlet in fluid communication with a source of pressurized gas, an outlet through which the gas leaves the nozzle and a passage extending between the inlet and the outlet. The outlet includes a plurality of apertures arranged in a predetermined manner relative to one another such that the flow path through the outlet approximates a 1/8 inch hole but does not clog with resin over successive plastic injections into the mold.

Abstract: An injection molding machine of the present invention includes a first mold half having one of at least one mold cavity and at least one mold core and a rotatable turret block rotatable on an axis for rotating a plurality of movable mold halves thereof into alignment with the first mold half. Each of the movable mold halves include one of at least one mold cavity and at least one mold core matable with the first mold half for forming a mold for molding a molded article. The rotatable turret block is further for clamping the movable mold halves and the first mold half together. The machine further includes a mechanism for moving the rotatable turret block relative the first mold half, a first injector for injecting melt into the at least one mold cavity, to form an injected article and a second injector for injecting melt into the at least one mold cavity over the injected article to form an injected article having at least two layers.

Abstract: A process and a device for the continuous production of fiber-reinforced molded bodies from hydraulically setting materials, wherein the setting materials are applied in a given width from at least two dispensers with a defined thickness in at least two separate layers on conveyors moving in opposite directions. The conveyors are substrates whose color and external constitution corresponds to the outer surface of the molded body and on which the layers and surface structures of reinforcing fibers are applied. With the simultaneous injection of another material layer as an intermediate layers, the layers with the substrates are conveyed through the adjustable gap formed by a pair of cylinder rollers and the layers and substrates are united under predetermined pressure to form the molded body. Immediately after passing the gap, the molded body is deflected in a discharge direction using the cylinder rollers and is discharged with the adhering substrates.

Abstract: An injection mold design system for correcting a profile of a product to be fabricated into a releasable profile from a mold to design an injection mold based on a corrected product shape, comprising storing means for storing information of product shape and mold profile, displaying means for displaying the product shape or the mold profile on a screen based on the information read from the storing means, inputting means for inputting designation information necessary for correction of the product shape or the mold profile, and controlling means for unloading information of lines or planes being obstructive to correction of the product shape and the mold profile into the storing means in response to the designation information input by the inputting means, removing the lines or the planes from the screen, and replotting the line or the planes on the screen in terms of the information of lines or planes unloaded into the storing means after the correction operation of the product shape or the mold profile is c

Abstract: Process and device for producing two-colored or multicolored switchboard films, dashboard films or dashboards for motor vehicles produced therefrom using at least one backing film or backing layer, at least one upper film or upper layer which is arranged thereon and contains dyes and/or color pigments. The polymer melts for these films or layers come from two or more extruders and are supplied first to an adapter or a black box having at least one opening or a gap for the backing film or layer and at least one further opening for the upper film or upper layer. According to the invention, an adapter or a black box is used in which a wedge-shaped projection or a projection of triangular cross section is arranged. At least two different-colored polymer compositions in melt form, having identical viscosity or virtually identical viscosity (difference in MFI at 230.degree. C./2.16 kg of 0 to 0.

Abstract: The invention relates to a method for fabricating hollow plastic objects of thermoplastic material, having the following steps: a) injecting melt into the tool cavity (1, 2); b) Simultaneously and/or subsequently introducing a pressurized fluid into the melt, so that the melt which has been introduced into the molding tool (1, 2) is distributed in the cavity and is pressed against the walls of the molding tool (1, 2), the pressurized fluid being conducted from a pressurized container (5) into the melt, and the pressurized container (5) being supplied with fluid by a compressor (7) which contains a drive element (6); c) allowing the molded part (8) to cool; and d) relieving the cavity of the pressure of the pressurized fluid. According to the invention, the drive element (6) of the compressor (7) is maintained at a temporally constant power level (P) at least over the production of a large number of plastic objects.

Abstract: A fastening connector of thermoplastic resin for connecting two separate members together is continuously molded efficiently in a single step by a simple method and apparatus. The method includes the steps of continuously extruding molten resin from an injection nozzle to the circumferential surface of a die wheel, which has in the circumferential surface, a multiplicity of engaging-element-forming cavities, to continuously mold a substrate sheet between the circumferential surface of the die wheel and the injection nozzle and a multiplicity of engaging elements in the engaging-element-forming cavities which elements stand on a front surface of the substrate sheet and, at the same time, to continuously mold at least one engaging ridge, through an engaging-ridge-molding channel, with part of the molten resin integrally with a rear surface of the substrate sheet.

Abstract: Trim panels for motorvehicles are manufactured by: injection molding a panel base portion having missing parts of predetermined area and shape, said molding involving the coinjection of a surface material and of an inner core material; separately producing a plurality of portions of panel having area and shape substantially corresponding to the missing parts and fastening said separately produced portions to said panels.

Abstract: The foregoing objects are attained by the opposed gating injection method and apparatus for forming molded articles and for use with injection molders wherein a first mold half and a second mold half are adapted to cooperate and form at least one mold cavity. A first injector nozzle is positioned in a first mold half adjacent the cavity, for injecting a first molding resin into the cavity through a first orifice. A second injector nozzle is included which is positioned in the second mold half adjacent the cavity for injecting a second molding resin. The second resin may be different from the first resin or the same as the first resin. The second resin is injected through a second orifice unconnected with the first orifice. The injector nozzles may be either simultaneously or sequentially activated for filling the mold cavity, and may be single material or co-injection type nozzles.

Abstract: After molten resin is injected into a mold cavity, an inert gas is sent from an inert gas supply device into the molten resin through a change-over valve and a gas nozzle device so that the molten resin is injection molded. At the same time, a tub is filled with part of the molten resin through a tub communication path. Thereafter, a burr portion of the injection-molded resin is bored using a boring punch so as to make a space within the hollow resin body communicate with the atmosphere. Next, the change-over valve is switched to send a cooling gas from a cooling gas supply device to the hollow space within the hollow resin body so as to cool the injection-molded resin.

Abstract: An improved gas injection nozzle for use in gas-assisted injection molding process is disclosed. The improved gas injection nozzle comprises: (a) a nozzle body, and a nozzle cap fixedly connected to the nozzle body; (b) a gas inlet provided in the nozzle body so as to allow gas to be injected into a mold cavity via a gas channel formed inside both the nozzle body and the nozzle cap; (c) a heating coil provided on the gas injection nozzle; and (d) at least one circumferential groove formed on the outer surface of the nozzle cap. The circumferential groove formed on the outer surface of the nozzle cap preferably has the shape of a spiral groove, with a depth between about 0.2 mm and about 0.5 mm and a length between about 50 mm and about 150 mm. The combination of the heating coil and the circumferential groove prevents the formation of micro cracks that are often formed in the interstices between the nozzle cap and the sprue bushing during the cooling stage of injection molding process.

Abstract: An injection apparatus capable of carrying out injection and filling of a resin and injection of a gas making use of an injection screw or injection plunger for the injection of a high-pressure gas comprises an injection screw 5 having a conical injection head 3 at the front end thereof and a ring valve 4 around a rear portion of the injection head, an injection cylinder the interior of a front end portion of which equipped with a nozzle member is formed as a tapered surface in accordance with the injection head 3 and can be closed by its contact with the injection head 3 and which contains the injection screw 5, gas flow passages 12 and 8 provided from the front end of the injection head 3 to a rear end portion of the injection screw 5, an opening/closing pin 17 inserted into the gas flow passage 12 in the injection head in such a manner that it can move together with a piston at the rear end of the injection head, and an actuation gas flow passage 10, provided inside the gas flow passage 8, for applying pre

Abstract: A compression apparatus which is operated in association with at least two mold parts which can move relative to one another. The compression apparatus is formed of at least one compression units having a working chamber and a working element which can move in it. A gaseous medium can be provided to the working chamber under any initial pressure. During the closing motion of the parts of the mold, the working element is moved in the working chamber, such that the volume in the working chamber is reduced, and in this way, in the course of the closing motion, the gaseous medium is compressed in the working chamber. The compressed gaseous medium can then be sent to a consumer with or without intermediate storage. A compression apparatus of this type is intended for an injection molding machine in which gas pressurization is to take place in a cavity.

Abstract: A method and an apparatus are disclosed for producing plastic objects with solid regions and hollow regions. The method has the following steps: a) blocking off a part of the cavity (2) of a molding tool (1), so that little or no plastic melt can reach the blocked-off region (8); b) injecting plastic melt into the unblocked region (9) of the cavity (2) of the molding tool (1); c) releasing the blockage, so that plastic melt can reach the previously blocked-off region (8) of the cavity (2); d) injecting a pressurized gas into the melt by means of at least one fluid injection nozzle (7), so that the melt injected into the molding tool is distributed into the desired regions of the cavity (2) while forming a hollow space and is pressed against the cavity walls of the molding tool (1); e) allowing the molded part (6) to cool; f) relieving the cavity (2) of the pressure of the pressurized fluid; and g) demolding the molded part.

Abstract: The production of an injection moulding of plastics material that includes introducing a supply of plastics material through one or more openings in a mould space, and introducing by way of at least one gas supply passage, a pressurized gas through a separate opening in the mould space into the plastics material within the mould space whereby the gas creates a gas containing cavity in the plastics material. An opening and closing of the gas supply passage is controlled by a valve which is opened by the pressurized gas with the valve featuring a valve port at the outlet end of the gas passage, and a movable valve member extending longitudinally of the gas passage for opening and closing the valve port. The valve member at least when in its extended or valve port open position, protrudes into the mould space and penetrates the plastics material to assist the gas in entering the plastics material.

Abstract: The equipment is for the moulding of plastics containers made of two different materials, particularly for the production of parisons for PET bottles comprising an inner portion of virgin PET and an outer portion of recycled PET. The equipment comprises a die plate having rotatable supports each carrying a pair of cores or male elements which are thus associated alternately with matrices of two different types so as to produce the inner portions and the outer portions of the parisons in two successive moulding steps.

Abstract: A method and an apparatus for producing plastic objects with hollow spaces is disclosed. The method comprises the following steps: establishing a fluid connection (9) between the main cavity (2) of a mold (1) and an overflow cavity (8) and injecting a sufficient amount of plastic melt into the cavity (2) of the mold (1) along a melt flow path, which extends from a plasticizing unit (4, 5) through a plastic injection nozzle (3) into the mold (1), such that plastic melt passes from the main cavity (2) into the overflow cavity (8). The fluidic connection (9) between the main cavity (2) and the overflow cavity (8) is then broken-off prior to the introduction of a pressurized fluid, especially a pressurized gas, into the melt in the cavity (2) by means of at least one fluid injection nozzle (7), so that the melt situated in the cavity (2) is distributed in the cavity (2) while forming a hollow space, and is pressed against the cavity walls of the mold (1).

Abstract: A mold assembly for casting or molding a multiple portion article in sequential shots without opening the mold assembly. The mold assembly includes a movable mold insert that permits the portions to be interconnected as an integral part of the casting process. The mold insert includes a first or male void for defining a male end and a second or female void for defining a female end. In operation, the mold insert is placed in a first position and molten material is introduced into a first cavity portion to form a first portion with a male end. The mold insert is then placed in a second position with the female portion surrounding the male end of the first portion. Molten material is introduced into a second cavity portion to form a second portion with a female end at least partially surrounding the male end of the first portion.

Abstract: The invention relates to a process of and an apparatus for injection molding hollow-blown plastic bodies in which a mold cavity formed by a tool and consisting of at least one main mold cavity and at least one side mold cavity connected with this is filled with a pressurized flowable plastic melt and, simultaneously or after the setting in of the hardening of the walls in the main mold cavity, a pressurized fluid is introduced into the main mold cavity, as a result of which the flowable core in the main molded cavity is displaced while forming a flow front and, as soon as the flow front has reached the point of connection to the side mold cavity, a pressurized fluid is additionally introduced into the side mold cavity at the side opposite the point of connection such that the molten core in the side mold cavity is forced out together with the molten core in the main mold cavity.

Abstract: A method and an apparatus for producing plastic objects with hollow spaces is disclosed. The method comprises the following steps: injecting a sufficient amount of plastic melt into the cavity (2) of the molding tool (1); simultaneously and/or subsequently injecting a pressurized fluid into the melt by means of a fluid injection nozzle (7); allowing the molded part (6) to cool; relieving the cavity (2) of the pressure of the compressed fluid, and demolding the molded part, while plastic melt is driven out into at least one overflow cavity (8), which is connected to the cavity (2). According to the invention, the volume of the overflow cavity (8) is changed, and in particular enlarged. This volume increase advantageously is controlled or regulated. The advantage achieved thereby is that the injection molding cycle, especially the overflow of melt into the overflow cavity (8), remains controllable by simple means.

Abstract: A method of processing plastic material, wherein the plastic material is pressure-lessly distributed over the lower mold half of a mold divided in a horizontal plane, then the mold is closed and the mold cavity is entirely filled with molten material whereupon a fluid is injected into the molten material and a portion of the molten material is displaced into a secondary cavity by the fluid.

Abstract: The proposal is for a device for injection molding plastic items enclosing hollow spaces with which a further pressurised medium like air, gas or a fluid can be introduced through a hollow needle (5) at a point differing from the nozzle into a mould (1), the mould hollow or cavity (4) of which can be filled with molten pastic through a nozzle. There is a needle core (9) which can be moved axially to a limited extent in the hollow needle (5) and it is possible via this needle core (9) to vary the cross-section of or open and close the aperture (16) of the hollow needle (6) opening into the mould hollow or cavity (4). The needle core (9) bears a thickened head or plate (10) in front of the end of the aperture in the hollow needle, the outside diameter of which corresponds at least approximately to the outside diameter of the hollow needle, so that it forms, with the aperture end (6) of the hollow needle (5), a radially directed splitting valve.

Abstract: A gas-introduced injection molding is disclosed, which is obtained by charging molten resin into a die and introducing gas into the charged molten resin. The molding thus obtained has a sufficient thickness portion extending linearly as a framework and a sheet-like small thickness portion integral with the sufficient thickness portion and having a uniform thickness, a space being formed inside the sufficient thickness portion. Thus, even by reducing the overall thickness of the molding it is possible to ensure sufficient rigidity with the hollow portion, and the molding is thus best suited as a sheet-like product requiring a predetermined rigidity, such as an automobile bumper, a household electric product casing, etc.

Abstract: Apparatus is disclosed for producing composite cylinders having cylinder walls comprised of two adjacent diverse layers of metal material which are bonded together by application of radial forces thereto and then sintered to complete the bonding process. Mechanical locking of the layers is achieved by grain interlocking between the two layers of metal material.

Abstract: The invention comprises a plasticating machine for the working and forcing of plastic material into a mold, said machine including an elongated housing having a first or proximal end and a second or distal end, an elongated screw shaft with a screw flight therearound, the screw shaft being rotatably supported in the elongated housing, for the working of plastic between the screw shaft and the elongated housing with at least one delivery conduit generally longitudinally arranged through the screw shaft, from a proximal end to a distal tip end thereof. The conduit may be arranged to be movable with respect to the screw shaft to permit delivery of a medium through the screw shaft to any plastic being driven from the machine. The medium may be any single or combination of components selected from the group comprising vapor, liquid, gas, powder or solid, to control the machine or treat any plastic being driven therefrom.

Abstract: A method for the non-resin fluid-assisted injection molding of a resin to produce a shaped resin article having an improved surface finish, which comprises effecting an excess filling of a mold cavity of a sealed mold with a molten resin to form a molten resin mass having opposite, first and second surfaces respectively facing opposite inner walls of the mold cavity, wherein the excess filling is performed in a specific excess filling ratio which corresponds to an excess ratio of a resin by an amount corresponding to 30 to 90% of the difference between the volume of the mold cavity and the volume exhibited by the resin in accordance with the shrinkage thereof when the molten resin filled in the mold cavity is cooled to room temperature, and subsequently introducing a pressurized non-resin fluid into the mold cavity on a side of the first surface of the molten resin mass to thereby press the second surface of the molten resin mass against the cavity inner wall remote from the side of the introduction of the no

Abstract: A supply of pressurized gas is separated into a first quantity of pressurized gas at a first temperature and a second quantity of pressurized gas at a second lower temperature. The first and second quantities of gas are injected into molten plastic in an injection mold in a predetermined sequence to form a hollow molded plastic article. A controller independently controls the pressure and time of delivery of the first and second quantities of pressurized gas supplied to the mold. A third quantity of extremely lower temperature gas may also be supplied to the mold in a timed sequence with the first and second quantities of gas. A variable pressure regulator receives stored pressure signals from the controller and establishes the pressures of the first, second and the optional third quantities of gas independent of each other.

Abstract: A method and system for injection molding plastic articles which utilize a spill cavity whose volume varies. In one embodiment, the volume varies during introduction of pressurized gas into a mold cavity flow coupled to the spill cavity. In another embodiment, the volume of the spill cavity varies during a plastic injection which fills the mold cavity. A piston reciprocally mounted within a cylinder defines the variable volume of the spill cavity. In one embodiment, a pneumatic control circuit controls the pressure on a lower surface of the piston to thereby control the position of the piston within the cylinder and therefore the volume of the spill cavity. In another embodiment, an air spring is utilized to control pressure on the piston which counters the pressure of the plastic on the piston. In one embodiment, a stop pin connected to the piston prevents the piston from leaving the cylinder when the mold is opened and solidified plastic in the spill cavity is to be ejected therefrom.

Abstract: An injection molding machine of the present invention includes a first mold half having one of at least one mold cavity and at least one mold core and a rotatable turret block rotatable on an axis for rotating a plurality of movable mold halves thereof into alignment with the first mold half. Each of the movable mold halves include one of at least one mold cavity and at least one mold core matable with the first mold half for forming a mold for molding a molded article. The rotatable turret block is further for clamping the movable mold halves and the first mold half together. The machine further includes a mechanism for moving the rotatable turret block relative the first mold half a first injector for injecting melt into the at least one mold cavity.

Abstract: A gas assisted injection molding system and method in which quantity of an inert gas is applied both internally and externally to a thermoplastic material introduced into an injection mold cavity during formation of an injection molded part. The system includes first and second mold portions defining a mold cavity. An injection means injects a quantity of a thermoplastic material into the mold cavity to form an injection molded part within the cavity. At least one internal gas inlet is provided for introducing a first quantity of gas into a portion the thermoplastic material to form a gas channel therein. The gas within the gas channel presses the thermoplastic material against a mold parting line defined by the intersection of the mold portions and forms a seal between the mold cavity and the mold parting line.

Abstract: A control system for a gas assisted injection molding apparatus which provides precise and reproducible indication of when the injection of plastic is to terminate and when the pressurized gas is to be introduced on the basis of sensing of the location of the flow front of the injected plastic in the mold cavity. The flow front sensor control system according to the present invention includes: one or more sensors located at one or more predetermined locations of the cavity of a mold of a gas assisted injection molding apparatus, a controller which processes sensed data from the one or more sensors and thereupon sends a signal to the gas assisted plastic inaction molding apparatus to discontinue plastic inaction and introduce pressurized gas. The preferred type of sensor is a temperature sensor; however, other types of sensors, such as a pressure sensor, may be used.

Abstract: A method for the production of a molded article having a hollow portion by utilizing a gas compression apparatus having a gas source, a compressor composed of a piston and a cylinder, and a discharge valve for controlling the flow of pressurized gas discharged from the cylinder, the method comprising introducing the pressurized gas through the discharge valve into a molten resin injected into a cavity of a mold, under the control of the discharge valve while carrying out, in one molding cycle, the intake step of supplying gas from the gas source to the cylinder and the compression step of compressing the gas by movement of the piston in the cylinder, at least twice each on the basis of predetermined compressor operation conditions, and thereby forming the hollow portion in the molded article.

Abstract: The invention concerns a procedure for the manufacture of an assembled object intended for repeated assembling and disassembling, e.g. a tube (1) with matching cap (4), and a machine for the execution of this procedure. According to the invention the tube (1) and the cap (4) are cast in the same mould (7) end ejected simultaneously and assembled in the exact position they are to have when used. This can suitably be done by first casting the part (4), which at the boundary surface is placed outermost. When it has assumed its final shape, it serves as an independent mould when producing the other part (1). The first cast part (4) thus contributes to the securing of the core system (9, 10, 11) for the other part (1), whereby the wall thickness of this part can be made especially uniform and thin. The machine for the execution of the procedure can thus cast e.g. the assembled cap (4) and tube (1), and it can, therefore, also be adapted to perform an automatic filling, sealing and possibly stamping of the tube.

Abstract: An apparatus and method includes a mold which defines a mold cavity with an inlet through which a molten, moldable material can pass into and/or through the mold cavity. A feeder for preparing the molten, moldable material, is spaced from the mold and expels the material to the mold cavity or to an accumulator connected to the mold cavity. A mechanism for controlling the temperature of the material in the feeder, accumulator, and the mold, as well as at least one gas injection unit with controls for the gas before, during and after its injection into the mold cavity and/or into gas channels located within and/or around the mold cavity are provided. A closed loop regulating system easily adjusts and regulates the gas flow and monitors the average gas pressure of the injected gas according to a programmed conditioning signal. The gas injection unit has relief valves and gas tanks.

Abstract: Within a casing (10), on each side of a center plane (A), a feeding channel (26, 28) and a pressure channel (32, 34) are defined. The pressure channels (32, 34) are converging in the direction of a jet arrangement (40). Further, within the casing (10), on each side of the center plane (A), a first and a second rotatably driven feeding roll (42, 44), respectively, are disposed each between one of the feeding channels (26, 28) and the associated pressure channel (32, 34). The feeding rolls (42, 44) have their axes of rotation define a transverse plane (B). Two additional rotatably driven rolls (52, 54), disposed within the casing (10) on one side each of the center plane (A), define together with one each of the feeding rolls (42, 44) a nib (62, 64). On the side of the transverse plane (B) which is remote from the jet arrangement (40), at least a third rotatably driven feeding roll (46) is provided, having assigned to it a third inlet channel (30) and a third pressure channel (36).

Abstract: Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding).

Abstract: An apparatus including of a mold for slush molding articles of a least two colors; a tank; a separation wall disposed in the tank and dividing the tank into two spaces; a gasket mounted on a free edge of the separation wall which faces the mold, the gasket having a plurality of rigid inserts disposed therein in a predetermined distribution; and an actuator device which expands and retracts the rigid inserts thereby correspondingly expanding and retracting the gasket. A method for slush molding utilizes the apparatus.

Abstract: A molding apparatus includes a movable mold-defining member mounted on the movable side of an injection machine and a stationary mold-defining member mounted on its stationary side. Those members are joinable to define a mold cavity and a runner channel therebetween. The movable mold-defining member is provided with a dividing member for dividing the runner channel, or cavity, or both into a plurality of portions. The dividing member is normally urged by an elastic member to project into the channel, or cavity. The dividing member has one side which is substantially perpendicular to the direction of flow of a molding resin material to stop its flow past the dividing member, and an opposite side cut away partly to form a recess at one end thereof, so that another molding resin material reaching the opposite side may flow into the recess and thereby move said dividing member out of the channel, or cavity by overcoming the force of the elastic member.

Abstract: The present invention comprises a method for delivering a medium such as a gas, vapor or liquid into a melted plastic in a mold via an elongated screw shaft rotatably supported in a housing, the method including the steps of providing the screw shaft with a bore longitudinally therethrough from a proximal end to a distal tip end thereof, rotating the screw shaft in the housing to move plastic therethrough, and into the mold, introducing a gas, vapor or liquid into the bore, to permit the gas, vapor or liquid to be delivered through the bore, and into the molten plastic in the mold through the distal tip end of the screw shaft.

Abstract: A method of injection molding of workpieces, formed of at least two different layers, and which includes forming at least one layer from lacquer, with the apparatus for effecting the method including at least two injection molding devices for forming melts of lacquer and non-lacquer materials and an injection unit communicating with the two devices for injecting the two melts into a mold cavity of a mold.

Abstract: A sport shoe or boot comprises an integral outer shoe including a plurality of shaped portions of at least two different synthetic resin materials, adjacent portions of different synthetic resin materials being interconnected in overlapping transition areas shaped to fit each other. The outer shoe is manufactured by injecting the different synthetic resin materials in plasticized condition and at staggered intervals into a mold cavity at pre-selected portions thereof, permitting the injected synthetic resin materials to harden in the mold cavity to form the integral outer shoe, and removing the outer shoe from the mold cavity.

Abstract: An injection-molding method using an injection molding machine having a mold apparatus comprising(A) a fixed mold member,(B) a movable mold member movable in the mold opening and closing directions,(C) an intermediate mold member which is provided between the fixed mold member and the movable mold member and is slidable in the mold opening and closing directions between the fixed mold member and the movable mold member, and(D) at least one intermediate mold member sliding means for sliding the intermediate mold member in the mold opening and closing directions,the method including the steps ofinjecting a molten resin into a cavity formed of cavity wall surfaces of the fixed mold member, the intermediate mold member and the movable mold member, andincreasing the distance of the cavity by moving the movable mold member in the mold opening direction with keeping the intermediate mold member in intimate contact with the fixed mold member or the movable mold member by the intermediate mold member sliding means, an

Abstract: The foregoing objects are attained by the inventive opposed gating injection method and apparatus of the instant invention for forming molded articles and for use with injection molders wherein a first mold half and a second mold half are adapted to cooperate and form at least one mold cavity. The invention includes a first injector nozzle positioned in a first mold half adjacent the cavity, for injecting a first molding resin into the cavity through a first orifice. A second injector nozzle is included which is positioned in the second mold half adjacent the cavity for injecting a second molding resin. The second resin may be different from the first resin or the same as the first resin. The second resin is injected through a second orifice unconnected with the first orifice. In accordance with the invention, the injector nozzles may be either simultaneously or sequentially activated for filling the mold cavity, and may be single material or co-injection type nozzles.

Abstract: Injection molding apparatus comprising a platen, a die which is fixed to the platen and which defines a mold cavity having an inlet, a co-injection manifold mounted on the platen, the manifold including a nozzle housing having forward and rearward ends, the nozzle housing including an outlet which is located adjacent the forward end and which communicates with the mold cavity inlet, first and second spaced apart inlets which are located adjacent the rearward end and which are respectively adapted to communicate with first and second injection nozzles, a first passageway communicating between the first inlet and the outlet, and a second passageway communicating between the second inlet and the outlet.

Abstract: It is proposed that a pressure control device and/or pressure regulating device (8) be used for a fluid medium, in particular air or gas, preferably nitrogen, which is to be supplied to an injection mold in addition to the molten plastic, this pressure control device and/or pressure regulating device (8) being provided as a stationary, but preferably as a mobile unit between a pressure generator/pressure accumulator (7) and an injection system associated with the injection mold (3), e.g., in a nozzle head or add-on building block.

Abstract: An apparatus for use in fluid assisted injection molding of plastic material so as to form an injection molded product includes a pair of mold members defining when closed the sealed cavity, a first opening provided in one of the mold members for allowing the injection of plastic material into the cavity and the second opening provided in one of the mold members, and spaced from the first opening, for allowing the injection of the fluid into the cavity. A sleeve extends through the second opening. The sleeve has a longitudinally extending bore with an open first end. Preferably, the sleeve is rigidly secured in relation to the one of the mold members through which it extends. A pin extends through the sleeve with the pin having a first end, located adjacent the sleeve first end, and a second end. Preferably the pin in rigidly secured in relation to the sleeve. A fluid flow passage is defined between the pin and the sleeve. In another embodiment, the fluid flow passage is defined between a tube and a pin.