Abstract: A procedure for sequential molding of an assembled object and a machine for the performance of the procedure are provided. A mold has a stationary front part, a movable back part and at least one turnable middle part. After the molding of the first part of an object, the middle part is turned at least once around an axis orthogonal to the moving direction between the front part and the back part, before the molding of the following part of the object takes place. Injection and cooling can take place in the front part and in the back at the same time. In an alternative embodiment, the middle part can be fitted with insulation to maintain a higher temperature between different regions of the mold assembly, making it possible to mold together considerably different materials such as a thermo plastic material and an elastomer, a silicone, or metal and plastic.

Abstract: The present invention relates to a method of manufacturing a thermally conductive article having an integrated thermally conductive surface. The method involves molding a first thermally conductive composition to form a body of the article and then molding a second thermally conductive composition to form an integrated surface on the body of the article. The integrated thermally conductive surface can interface with a heat-generating device (e.g., an electronic part) to dissipate heat from the device. The invention also encompasses thermally conductive articles produced by this method.

Abstract: A molding machine and associated process offers significantly reduced cycle time and increases production output. In one embodiment, an injection molding machine includes a rotatable turret block rotatable on an axis for rotating a plurality of movable platens thereof into alignment with a stationary platen. Each of the movable platens include at least one which can be mated with a die on the stationary platen for molding a molded article. The machine may include multiple, opposed stationary platens for alternately mating with the moveable platens. The rotatable turret significantly reduces cycle time and increases production output without an increase in required floor space.

Abstract: A two shot molding method is provided to make a fastener device having a fastener portion and integral seal portion of different material. The fastener device includes a fastener part having a plastic head and anchor stem with prongs and a flexible seal of different material integral with the fastener part and the two molded together in a two-shot molding technique.

Abstract: Disclosed herein is a separable manifold of hot runners for metal molds of injection molding machines and a method of manufacturing the manifold. The manifold is designed to be separated into an upper plate and a lower plate while having a flow channel therebetween. The upper plate is assembled with the lower plate into a manifold after inserting a channel pipe covered with copper plates in the flow channel. Thus, the manifold of this invention is easy to manufacture. In addition, it is possible to easily grind the flow channel of the manifold so as to remove angled corners from the flow channel.

Abstract: Method for manufacturing injection molding pieces consisting of at least two components whereby a first injection molding piece is formed of a first component in a first mold impression and a second injection molding piece is formed by putting the first injection molding piece in a second mold impression, and by providing a second component on it, characterized in that a mold with at least three series of mold parts is used, whereby the first series and the second series thereof alternately work in conjunction with the third series, and whereby a mutual repositioning of every first injection molding piece takes place in between.

Abstract: An apparatus for sending a switching signal to a switching device for switching the position of an injection gate of a injection molding machine for molding a work piece in a mold during a molding cycle between an open position and a closed position is provided. The switching signal is indicative of one of the open position and the closed position. The apparatus is to be hand carried by a machine operator. The apparatus includes a frame including a portion thereof for gripping by the operator and a power supply operably associated with the frame. The apparatus also includes a timer operably associated with the frame. The timer is operably connectable to the power supply for receiving an initiation signal from the injection molding machine indicative of the initiation of the molding cycle and for generating the switching signal in response to the initiation signal.

Abstract: A method of manufacturing a plurality of interconnected vials with a mold. The mold includes a first slide and a second slide. The method comprises contracting the first slide and the second slide so that a plurality of cavity profiles linked together by a plurality of arms is formed. A plurality of core pins is placed within the plurality of cavity profiles so that the core pins are freestanding. A plastic fluid is injected about the plurality of core pins to form a plurality of interconnected vials. The plurality of interconnected vials are removed from the plurality of core pins. The plurality of interconnected vials are placed into a holder tray and a liquid is injected into the vials. The open ends of the vials are heat sealed in order to encapsulate the plurality of interconnected vials. The steps of heat sealing include applying heat, measuring the temperature applied, and measuring the time the heat is applied.

Abstract: A double molding process whereby at least one sign is produced on a product while the product is molded. The product has an inner core and an outer cover. In the process, the inner core is molded with a first molding material. The inner core has at least one side provided with a groove in the shape of the sign to be produced. The inner core also has at least one other side provided with at least one channel leading within the inner core to the groove. The outer cover is then molded onto the inner core with a second molding material in such a manner that the one side of the inner core is not covered by the second molding material and thus remains visible. The channel of the other side and the groove of the one side are both filled up with the second molding material to produce the sign on the side of the product.

Abstract: A method for making a melamine container with dual-side patterns including four steps, which are (1) making a first part of a melamine container, (2) forming patterns on the first container part, (3) making a second part of the melamine container, and (4) forming patterns on the second container part. More specifically, the first container part is formed in a first mold, and a male part of the first mold is removed to uncover an inner side of the first container part for allowing patterns to be attached on the inner side. Then, the first container part is repositioned in a second mold so that the second container part is formed over the first container part. A female part of the second mold is removed for allowing patterns to be attached to the outer side of the second container part.

Abstract: A method for making a dual-color melamine container includes (1) making an inner part of container with a first mold by injection molding; the male part of the first mold being formed with several projecting patterns thereon so that the inner part of container is formed with holes having patterns, (2) attaching patterns to an inner side of the inner part of container, and (3) repositioning the inner part in a second mold, and forming an outer part of container over the inner container part, and attaching patterns to an outer side of the outer container part; thus, the inner part can be made dial-color with injection molding if melamine materials used in both injection molding processes are different colors.

Abstract: Disclosed is an injection molding apparatus that includes an extruder configured to produce a continuous flow of molten plastic. The injection molding apparatus also includes a plurality of mold assemblies and a delivery system that provides an uninterrupted transfer of the continuous flow of molten plastic from the extruder to the plurality of mold assemblies. The present invention also includes an process for using the injection molding apparatus that includes forcing a continuous flow of molten plastic into a delivery system and sequentially routing the continuous flow of molten plastic from the delivery system into a plurality of mold assemblies without interruption.

Abstract: Manufacturing variable and/or singular property products, such as a tubing, in a tip-and-die assembly, where intermittent acting material injectors are used. Two or more injectors take turns making material shots to maintain a continuous material stream. A singular flow controller regulates the flow for all material streams coming from the injectors.

Abstract: An injection molding apparatus and method are provided in which the rate of material flow during an injection cycle is controlled. According to one preferred embodiment, an injection molding apparatus is provided that includes a manifold, at least one injection nozzle coupled to the manifold, an actuator, and a valve pin adapted to reciprocate through the manifold and the injection nozzle. The valve pin has a first end coupled to the actuator, a second end that closes the gate in a forward position, and a control surface intermediate said first and second ends for adjusting the rate of material flow during an injection cycle. Retracting the valve pin tends to decrease the rate of material flow during the injection cycle and displacing the valve pin toward the gate tends to increase the rate of material flow during the injection cycle.

Abstract: A method of forming an instrument panel for a vehicle includes first providing a first mold structure having a first surface formed therein, a second mold structure having a second surface formed therein, and a third mold structure having a third surface formed therein. The first mold structure is positioned relative to the second mold structure such that the first and second surfaces are in a spaced relationship with one another to define a first cavity. A first material is introduced into the first cavity to form a substrate. The second mold structure is positioned away from the substrate. The third mold structure is positioned relative to the first mold structure such that the third surface and the substrate are in a spaced relationship with one another to define a second cavity. A second material is introduced into the second cavity to form an outer layer overmolded onto the substrate. The first material is different from the second material.

Abstract: The present invention (FIGS. 1, 1, 2, 3, 4, 5, 6, 7, 8 9 10, 11, 12, 13, 14, 15, 16, 17, 18) provides an injection molding method and apparatus. A hot manifold is provided having a plurality of independently controlled valve gates. A controller is operably connected to each of the valve gates enabling independent opening and closing thereof. A mold has at least two cavities, a larger cavity and a relatively smaller cavity. The larger cavity has at least two inlets each communicating with the valve gates of the hot manifold. The smaller cavity has at least one inlet communicating with respective valve gate of the hot manifold. The larger cavity is filled with a first plasticized material by sequentially opening and closing the valve gates communicating with the large cavity. The larger cavity is packed out Simultaneously with the packing out step, the smaller cavity is filled and packed out with a second plasticized material by opening and closing the at least one respective valve gate.

Abstract: A window 30 is a two-color molding comprising a transparent section 32 and a frame section 31 integrated with the transparent section 32, the frame section 31 and the transparent section 32 are formed with a first material and a second material respectively, and the first material is a thermoplastic resin with the linear thermal expansion coefficient in the MD direction lower by 1×10−5 to 3×10−5 (mm/(mm.K)) than that of the second material, and also with the MD/TD ratio for the linear thermal expansion coefficient in the range from 0.6 to 1.

Abstract: A module for a modular conveyor belt, is described. The module is of a sandwich layer construction having a core polymeric material completely surrounded by a skin polymeric material. The skin material includes an antimicrobial material for inhibiting bacterial growth on the module, and the conveyor belt is particularly useful for conveying and transporting foods including food processing and food handling applications.

Abstract: An injection mold is provided for injection molding an encapsulation material to encapsulate at least one integrated circuit chip. The injection mold includes at least two parts that define at least one injection circuit, and at least one blind complementary channel communicating with the injection circuit. The injection circuit includes at least one injection cavity for housing the chip, at least one transfer chamber from which the encapsulation material is injected, and at least one injection channel connecting the transfer chamber to the injection cavity. The blind complementary channel is formed between the two parts of the mold and forms at least one appendage of encapsulation material that is connected to the encapsulation material that fills the injection circuit. Also provided is a method for injection molding an encapsulation material to encapsulate at least one integrated circuit chip.

Abstract: A moulding method, carried out by a mould for a conventional injection press, suitable for cost-effectively realising a piece in one or more injectable materials, the mould comprising a mobile part and a fixed part, on such mobile and fixed parts being realised respective impressions, which define, when the mobile part is closed against the fixed part, recesses suitable for receiving the injectable materials in at least two successive injection steps; the method comprises a step of housing a sliding element in at least a first recess, a first injection step in such a first recess, after which a first part of the piece remains fixed on a surface integral to such a sliding element, a displacement step of such a first part of the piece in a second recess and then a second injection step in such a second recess.

Abstract: In an automobile interior component which is upholstered in a side-panel of a vehicle and its manufacturing method, in order to suppress the generation of sharp edged fragments in a collision for improving safety for vehicle occupants, high-impact-resistant core members with a rubber base ingredient are placed in an impact area and an interference area to interfere with other parts of the interior component. This avoids sharp-edged fragments being generated in a collision because of ductile breakdown of the high-impact-resistant core members enabling increased shock absorbing function and the use of inexpensive surface skin members as well.

Abstract: Shield cans and methods for manufacturing such are presented. The shield cans include a plastic housing, a conductive inlay, and a conductive gasket. The shield cans are manufactured using a multi-k procedure in one single mould. The mould includes of a fixed mould part and a rotary mould part having projections and recesses. A conductive inlay is placed on one projection and the plastic housing formed on one side of the inlay. The rotary mould part is rotated, after which the gasket is formed on the side of the inlay opposite the housing.

Abstract: An injection moulding process for making a toothbrush involving a stack mould assembly of at least three mould blocks (1, 2, 3, 4) arranged for use along a longitudinal stack axis (A-A), with two end mould blocks (3, 4), and an intermediate mould block (1, 2), with part mould cavities (11A, 21, 31, 41, 51) in the blocks. Plastic toothbrush skeletons are made in a cavity (11A, 21, 31) between the intermediate block (1, 2) and one end block (3), then elastomer parts are made in a cavity (41, 51) between the intermediate block (1, 2) and the other end block (4). Preferably the intermediate block (1) rotates so its part cavity (11A) faces the other end block (4). Stack mould assemblies (1, 2, 3, 4) for this process are provided. The assembly (1, 2, 3, 4) provides a compact mould with high output.

Abstract: An injection moulding process for making a moulded article particularly a toothbrush consisting partly of a hard first plastics material by providing a first injection mould introducing a component into the cavity adjacent to the surface; injecting a plastics material into the cavity so that the plastic material is fixed to the component and the component forms part of the outer surface of the article. In a second moulding operation another material such as an elastomer may be injected. A toothbrush product made by this process is also described.

Abstract: A mold runner for a runner or sprue type injection molding apparatus. The mold runner allows the passage of a substrate material from an injection source into a mold cavity and contains a containment shroud which utilizes the relative incompressibility of the substrate material in the containment shroud which prevents an in-mold coating, which is injected into the mold cavity in a subsequent step, from flowing into the injection substrate source thereby contaminating the same.

Abstract: A mill blank assembly for a dental prosthesis includes a milling section and a support section for supporting the assembly in a milling machine. In certain embodiments, the milling section is adhesively bonded to the support section by a direct chemical bond that provides enhanced resistance to unintentional detachment of the milling section from the support section during a subsequent machining operation. Optionally, the support section includes a passageway that receives a quantity of flowable dental restorative material used to make the milling section, such that the restorative material that is located in the passageway provides additional resistance when hardened to unintentional detachment of the milling section from the support section.

Abstract: An apparatus for injecting plastic material comprises a manifold having a melt channel and a flat sealing surface, and a nozzle assembly seated directly against the flat sealing surface. The nozzle assembly includes a nozzle body having an axial channel aligned, in use, with the melt channel in the manifold for communicating a flow of material therein. The nozzle body has a non-flat sealing surface adjacent the flat sealing surface, thereby forming a sealing interface to seal the nozzle body with the manifold. The flat sealing surface may be on an end of a bushing mounted into the manifold. The non-flat surface may have a conical profile, preferably defined by an angle less than one degree, and preferably between 0.2 to 0.4 degrees, from a plane parallel to the flat sealing surface. The non-flat surface may have a spherical profile, preferably having a radius between 350 mm and 4000 mm.

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

Abstract: The swivel hinge includes a swivel element with apertures and a base element with a swivel shaft which is journaled for rotation within the apertures. The apertures include radially inwardly extending fingers which position the swivel shaft and are formed as molding gates for molding windows which are provided in common for initially molding the base element and the swivel member as a single integral piece. Subsequent rotation breaks the molding gates and the vestiges form the fingers.

Abstract: Dendrimer additives incorporated in thermoplastic resins (such as polycarbonate resins) are effective to alter the surface characteristics of the thermoplastic resin. Such compositions can be injection molded to produce articles in which the dendrimer additive is concentrated at the surface of the article to alter the properties of the resin. By selection of the type of dendrimer additive, the resulting characteristics of the molded article may be controlled.

Abstract: An apparatus, mold assembly and related method for manufacturing a personalized lipstick is described, the apparatus including a housing or cabinet, a plurality of different color blends each held within a separate pot fitted with a dispensing system, an ultrasonic wave heating/mixing probe, a mold assembly held within the probe and a transport rail for moving the probe from one station to another within the housing. The lipstick mold assembly includes a sheath containing a solidified base wax formed with a well for receiving color pigments.

Abstract: A multi-material runner gate system allows effective de-gating of elastomeric materials that would otherwise stretch and/or flex reducing de-gating forces at the gate upon separation of the molds.

Abstract: A process for producing an exterior member/seal member assembly includes: a first step of moving a slide core to protrude into a major cavity defined between first and second dies and, and injecting a hard synthetic resin into an exterior-member forming cavity partitioned in the major cavity; and a second step of retracting the slide core and injecting a soft synthetic resin into a seal-member forming cavity which is a remaining portion of the major cavity. An outer-seal-lip forming portion is connected to an outer end of the seal-member forming cavity; a recess-shaped step is formed on one side face of the slide core and adapted to define an inner-seal-lip forming portion leading to the seal-member forming cavity between the step and an inner surface of a guide bore in the second die when the slide core is retracted; and the soft synthetic resin is filled into the outer and inner-seal-lip forming portions 15 and 16 at the second step.

Abstract: Method and apparatus for cooling molded plastic pieces preferably includes a take out structure/step configured to hold the plurality of plastic parts oriented such that closed ends thereof are disposed toward an inside of the take out structure and open ends thereof are disposed toward an outside of the take out structure. A movement structure/step is configured to cause relative movement between the take out structure and at least one of a first cooling station and a second cooling station. The first cooling station includes a first cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof. The second cooling station includes a second cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof.

Abstract: A method and apparatus for extruding plastic articles, the method comprising the steps of injecting at least one stream of plastic material into a mold, the mold including a first portion and a second portion, the first portion of said mold being used for forming at least one article, and the second portion of said article forming a sprue attached to the at least one article, and, terminating the at least one stream of plastic material in the second portion.

Abstract: A liquid colorant system for plastics comprising from about 10 percent to about 80 percent by weight colorant; from about 0.5 percent to about 30 percent dispersant; and, from about 25 percent to about 90 percent water.

Abstract: A co-injection nozzle pin (20) having downstream and upstream ends. The nozzle pin has therein a central bore (30) including an upstream end (32) adapted to communicate with a first material and a downstream end (34) exiting at the downstream end of the pin. The nozzle pin also has an outer surface (36) including a first portion (38) having a diameter D1, a second portion (40) having a diameter D2, wherein D2 is less than D1 and the first portion is rearward of the second portion. The pin further includes a channel (46) spiralling around the outer surface and being adapted to communicate with a second material. The channel (46) includes a first segment (52) defined in the first portion (38) of the outer surface and increasing in depth as it travels in a downstream direction and a second segment (54) defined in the second portion (40) of the outer surface and decreasing in depth as it travels in a downstream direction.

Abstract: Method and apparatus for forming an article from a molten plasticized resin using an injection molding machine by (a) forming a mold cavity having a first region for producing a molded part and a second, distinctive region for receiving a plasticised resin; (b) injecting into the second region a volume of plasticized resin for the article to be formed in the first region of the mold cavity; (c) applying pressure to plasticized resin to move it at least in part from the second region to the first region; and (d) maintaining pressure on the plasticised resin in the first region until the article is formed and stresses are relieved.

Abstract: An improved melt distribution system and method is provided for a multi-level stack mold having three or more moving platens. The injection machine communicates with a bifurcated sprue bar for providing pressurized melt through the first moving platen to a central distribution manifold in the second moving platen. From the central distribution manifold, the flow of pressurized melt is distributed to the first and third platens for transfer to a plurality of mold cavities.

Abstract: In a method of producing injection-molded parts, an injection mold has two mold halves and a melt feeding device for application of melt across the mold surface of a mold half, when the injection mold is open. The melt is pressed into all areas of the mold cavity, when closing the mold halves. In order to simplify the arrangement of the hot runners in the mold half, when different injection-molded parts are produced, it is proposed to apply the melt onto the mold surface by a hot runner plate which is positioned above the mold surface, whereby the hot runner plate has several melt nozzles in the form of needle seal nozzles which are operated and controlled depending on the profile required for the respective mold half.

Abstract: Injection molding of a product and decoration molding of a surface of the molded product are performed using individual cavity molds. A decorative film can be molded efficiently with a thermosetting coating material under suitable temperature control regardless of the shape of the molded product. An injection cavity mold and a decoration cavity mold are employed. The injection cavity mold is set at a hardening temperature of a thermoplastic resin. The decoration cavity mold is set at a thermosetting temperature of a coating material. A molded product is formed by injection molding in the injection cavity mold. The injection molded product is located within the decoration cavity mold to create a space as a cavity for decoration molding between an inner surface of the decoration cavity mold and a surface of the injection molded product.

Abstract: A chain guide member used in a chain transmission apparatus, and manufacturing method and apparatus thereof. The chain guide member has a sliding contact section extending along a traveling surface of a chain and coming into sliding contact with the chain, and a reinforcement main body reinforcing and supporting the sliding contact section along the traveling surface of the chain. A part or all of a joint portion between the sliding contact section and the reinforcement main body is joined by melting.

Abstract: An energy attenuation restrictor device for use in an energy attenuation apparatus for a conduit adapted to convey a liquid under pressure, particularly, in the power steering system of a vehicle wherein said energy attenuation restrictor device includes a tuning cable composed of a first organic polymer and a fitting member composed of a second organic polymer, and a method for molding the energy attenuation restrictor device are described.

Abstract: The injection molding method according to the present invention selectively carries out a single layer molding operation in which injection units for measuring resins while plasticizing the former to inject them to a cavity part are connected together, and only desired resins in one of the injection units are injected into the cavity part to thereby mold a single layer molded product; and a multi-layer molding operation in which mixed resins formed when resins are changed in one of the injection units are injected into the cavity part so as to constitute a core layer, and desired resins in the other of the injection units are injected into the cavity part so as to constitute a skin layer thereby molding a molded product of a multilayer construction.

Abstract: A balanced cold runner system for use in injection molding a thermotropic liquid crystal polymer resin, said runner system comprising a plurality of runners wherein, in the through-plane of resin flow, substantially all the runner sections that connect one runner intersection to the next runner intersection at which branching occurs are free of sharp corners and wherein substantially all of the runner intersections at which a runner branches in no more than two directions are radiused in the direction of resin flow.

Abstract: A method of making a heated injection molding nozzle with an integral tip insert. First, an inner portion, an outer collar portion, and an electrical heating element are made and integrally brazed together in a vacuum furnace using a first nickel alloy brazing material. Then a tip insert is made having a desired configuration and seated in the front end of the inner portion and a second nickel alloy brazing material is applied around it. The second brazing material has a melting temperature which is substantially below that of the first brazing material. The tip insert is then integrally brazed in place by heating them to a temperature above the melting temperature of the second brazing material and below the melting temperature of the first brazing material. In addition to not affecting the metallurgical bonding between the other components, this allows the tip insert to be easily removed for replacement by again heating the nozzle to this same temperature.

Abstract: An apparatus for injection molding two compatible polymeric materials, in which two substantially coaxial extrusion screws are used to plasticize the two materials into a common accumulation space. The charge comprising multiple layers of material is then injected into a closed mold by means of forward axial motion of the outer screw with respect to its enclosing barrel. Once inside the mold, the first material forms a skin layer totally or partially surrounding the other material. In this way a part having a plurality of material properties may be produced in a single operation.

Abstract: The invention concerns a method for sequential moulding with multiple materials for making a piece comprising at least two parts with matching shapes produced in a different plastic material, mobile relative to each other by pivoting about a hinge, which consists in: using a moulding equipment comprising a second mould (30) and a first mould (31) whereof the assembled impressions define the cavity of the open part, the mobile portions forming between them an angle of about 180°, one of the moulds (31) comprising a housing wherein slides a gate (35), capable of blocking the flow of the first plastic material; injecting the first portion (32, 34) with a first plastic material, the gate (35) providing with its side wall an obstacle to the flow of said first plastic material at the fasteners of the elements of the hinge on the second piece; causing the gate (35) to open and injecting the second plastic material into the second portion (33) of the piece.

Abstract: A method for the injection-molding of products made of at least two different materials, consisting, in a first step, in injecting into a mold a first material in an amount that corresponds to the lining of only a surface portion of the mold and, in a second step, in injecting at least one second material in order to lay at the inner portion of the mold lined by the first material and the remaining surface portion of the mold.

Abstract: Heat dissipation devices and molding processes for fabricating such devices, which have at least two regions comprising different conductive materials such that efficient thermal contact is made between the different conductive materials. The molding processes include injection molding at least two differing conductive materials.