Abstract: An injection manifold has a main runner provided with a supply inlet intermediate opposite ends of the runner. A number of branches intersect with the runner along its length so as to be disposed at unequal distances from the inlet. In order to achieve more simultaneous delivery, uniform fill rate, and identity of temperature of hot melt across all cavities of a multi-cavity set to achieve more uniform cooling of the preforms, restrictor pin assemblies are provided in association with certain of the branches to adjustably constrict the space available for melt flow from the runner into the branch. In a preferred form each restrictor pin assembly includes a pin aligned axially with the branch and passing transversely through the runner, the pin being adjustable between a fully extended, maximum constriction position in which the tip of the pin is located within the branch and a fully retracted, open position in which the tip is withdrawn out of the branch and is spaced below the opening of the branch.

Abstract: The present invention relates to a method of producing thick-walled brushes, in particular toothbrushes, with a grip piece and a brush head supporting bristle filaments. In order to increase the productivity, the method mentioned at the start is further developed by the present invention in that a core produced in a first injection molding cycle is coated with a plastic component in at least one subsequent injection molding cycle so as to form a multi-layered grip piece.

Abstract: A blow-molded decorative article is disclosed which comprises a plurality of different polymers having different melt flow rates that cause inter-dispersion of the polymers upon blow-molding. The article is blow-molded from a multiple layer parison that a plurality of layers of like polymers, i.e., polyethylenes, polypropylenes, polystyrenes, etc., that have different melt flow rates and different colors. As a result in the differences in the melt flow rates, the polymers of the various layers mix upon blow-molding to create the look of a glazed ceramic pottery or an exterior pattern such as a tie-dyed marbleized or camouflaged pattern.

Abstract: A method of co-extruding a plurality of plastic material flowing streams into a mold cavity produces a molded product. Inner and outer streams of covering plastic materials are combined with at least one interior stream that is to serve as an interior core of a resulting molded plastic product. The combined streams are forced to flow along annular flow paths, with the annular interior stream encased within the inner and outer annular covering plastic material stream layers. The flows of the interior stream and the inner and outer streams are controlled so that: the interior stream has a flow velocity that is greater than an average velocity of the combined stream, and the interior stream does not flow along or across a zero-velocity-gradient streamline of the combined streams.

Abstract: A method of manufacturing a molded article from a settable mixture includes the steps of in-taking a plurality of components into a plurality of separate material discharge containers sized relative to each other to provide the required mix ratio of the settable mixture. The components contained in the material discharge containers are discharged to a mold tool through a mixing head that receives each of the components separately and thoroughly mixes them into the settable mixture. The settable mixture flows from the mixing head to fill the mold tool. The mold tool rotates about an axis during the filling step to evacuate air from the mold tool. Pressure of the settable mixture is monitored during the filling step and rate of discharge of the settable component is varied in response to changes in pressure of the settable mixture.

Abstract: A method of forming ablative insulation coatings on aerospace structures and articles produced thereby. The method includes forming a mold having a cavity configured to complementarily receive at least a portion of the structure and directly molding the ablative coating to a surface of the structure by introducing a prepared ablative mixture, such as an epoxy resin, into the mold. The process may desirably include curing at atmospheric pressures to reduce the expense and equipment required in carrying out the process. The method of applying the ablative coating further includes features such as varying the thickness of the ablative coating from one portion of the component to another. Control of the thickness may be effected through use of spacers embedded into the ablative coating and formed of the same or similar material previously cured prior to placement in the mold.

Abstract: Molded articles or substrates having an in-mold coating thereon are disclosed. The in-mold coated substrates are produced by a method wherein the flow of the in-mold composition onto the substrate can be selectively controlled. The molded articles can be preferentially coated in desired or predetermined areas with in-mold coating compositions by controlling the thickness or depth of various sections of the substrate.

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: This invention relates to a method and apparatus for handling parts ejected from an injection molding machine (10). More particularly, in one aspect, the invention is directed to a system (20) whereby data molded into the ejected part is used to provide useful feedback for the molding process. In another aspect, molded parts formed in a multiple molding die (12) are ejected from the die in a manner to maintain the relative sequential or matrix organization so that useful feedback information can be generated. This system is particularly useful with subsequent machine vision and inspection applications.

Abstract: A multi-cavity injection molding method and device, and a controller for sequentially injecting material into cavities in the injection molding device. The methods and devices are effective to reduce the clamping force needed to clamp multiple cavity molds.

Abstract: The present invention involves a molded seamless vehicle interior panel having a seamless airbag door for concealing an airbag. The panel includes a retainer portion and a door portion circumscribed by the retainer portion. The retainer portion is disposed adjacent the airbag of the vehicle and has an opening to define a void over the airbag. The retainer portion has an appearance finish of an aesthetic look. The door portion disposed within the void integrally circumscribed by the retainer portion to define the seamless airbag door through which the airbag may deploy. The door portion has an appearance finish compatible to the appearance of the retainer portion such that no seam is visible. The door portion is molded together with the retainer portion and formed of a material different than the material of the retainer portion.

Abstract: An air passage switching system includes a switching door that is disposed rotatably in a case to open and close an air passage of the case. The switching door includes a door body, a rotation shaft provided in the door body, and a seal member made of an elastomer and adhering to an outer peripheral portion of the door body. The seal member contacts on a sealing surface of the case when the switching door closes the air passage. A plurality of recess portions are formed on the outer peripheral portion of the door body to be arranged in an outer peripheral direction. Thus, adhesion between the door body and the seal member can be strengthened.

Abstract: In a rear holder-attached connector (1), a relatively-thick protective rib (10) with a width (B) projects outwardly from opposite sides of a housing (2), and is disposed between upper and lower terminal receiving chambers (3). This width (B) is larger than a width of rear holders (20a, 20b), and this rib (10) protects the rear holders (20a, 20b) so that these rear holders, provisionally retained on the housing (2) within a metal-mold assembly, will not be discharged from the metal-mold assembly to drop, and will not be disengaged from the housing even upon contact with another housing. The provision of the protective rib (10) also serves to provide a good flow of a resin poured from the rear side of the housing (2) during the molding operation, and therefore thin partition walls, forming the terminal receiving chambers (3), can be positively molded, thereby enhancing the yield of the molded housings.

Abstract: A method is provided for producing a plurality of moldings in one mold wherein the mold has at least one introduction point for molding material and a plurality of cavities with a shape corresponding to that of the moldings. The cavities are arranged so that each cavity, except cavities in an end or peripheral position, is connected to at least two directly adjacent cavities. A fluid casting compound of a material having a solidified hardness of not more than about 200 N, defined as the force at which an 11 mm sphere of the material will shatter, is introduced into the mold, so that it essentially fills all of the cavities, and the casting compound is then solidified and removed from the mold.

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: An injection moulding apparatus for hollow parts comprises first and second co-operating dies, each die including a first male die core and a female die recess. One of the dies is rotatable about an axis. In a first angular position of the rotatable die, the male die core of the first die co-operates with the female die recess of the second die and the male die core of the second die co-operates with the female die recess of the first die, to define first and second moulds in which half-components may be formed. In a second angular position of the rotatable die, the respective female dies recesses of the first and second dies co-operate to form a third mould in which the half-components may be joined. The apparatus makes use of a single injector differentially controlled for each stage.

Abstract: The present invention is directed to an injection molding apparatus and method capable of preventing the occurrence of over-packing. The apparatus includes a pair of dies for forming a plurality of cavities therebetween; die closing devices for closing the pair of dies under a prescribed pressure; an injection device for injecting a molten resin into respective cavities under a prescribed pressure; and, a control device for controlling the die closing devices and the injection device. Further, the apparatus comprises a plurality of pressure sensors for detecting respective pressures in respective cavities and a control device that controls the injection device and/or the die closing devices to reduce the rate of injection of the molten resin and/or the force of closing the dies and, otherwise, stops the injection and/or the die closing operation when the pressure difference between cavities is found to be greater than a prescribed value on the basis of sensed values from the respective pressure sensors.

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: According to the present invention, a manifold mounting arrangement is provided wherein a leg manifold is securely mounted midway along its length rather than at its sprue bushing and whereby thermally induced length changes are accommodated outwardly from its centre. Additionally, a first end of the leg manifold is clampingly secured between a sprue housing and a manifold insulator to avoid movement of the first end toward the sprue upon a sprue break portion of the injection moulding cycle.

Abstract: A multi-layered plastic body for containing, storing or conducting a medical, diagnostic, pharmaceutical, cosmetic or other product, the plastic body including a first layer made of a stress fracture resistant plastic material, and at least a second layer adjacent to the first layer and made of a plastic material exhibiting a lower resistance to stress fractures than the first plastic material. The invention encompasses a suitable method of making the body.

Abstract: A fin is formed using a set of sectional molds, in which two material injecting units are provided to simultaneously inject two different types of raw materials into the molds, so that a blade portion and a foot pocket portion of the fin are formed at the instant of injection to produce a complete fin. The two injecting units may be separately preset or adjusted to optimal injecting time and pressure according to flow rates of the two types of raw materials in molten state, so that the molded blade portion and foot pocket portion are fully connected together to have an optimal bonding strength between them.

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: A molding and tentatively retaining mold 10 of the invention has a plurality of molds which are relatively movable with respect to a fixed mold, and molds a housing 31 and rear holders 32 and 33, which are respectively independent, in a plurality of cavities formed in cooperation with the fixed mold. When the rear holders 32 and 33 are relatively moved with respect to the housing 31 by a pair of rear-holder tentatively retaining cylinders 19 after molding, and are tentatively retained, the amount of movement of a pair of third movable molds 14 is set to be greater by a predetermined amount than an amount of movement necessary for tentatively retaining the rear holders 32 and 33, and the third movable molds 14 after movement are stopped at the moved positions until a predetermined time elapses.

Abstract: An improved hot runner manifold for a multi-cavity injection molding system. The manifold is formed in a manifold block and an insert. This insert may be a round bar with an outward shape which is grooved with a flow channel, or the insert may be combined with a set of grooved round bars together with matched grooved pipes. This insert will be inserted into the bore of manifold block. This grooved insert works as a flow channel inside the manifold. Compared to the traditional manifold, this invention can easily help to produce a balanced-flow manifold which will shorten the delivery time, be produced inexpensively, provide an easier structure to make multiple-drops (such as 12, 16, 32, 64, 256 drops) in an elongated direction with a balanced flow, provide a manifold structure to help the flow channel of insert to be easily taken off for cleaning and provide a very good temperature-balance manifold in order to help molding nice quality plastic for each drop.

Abstract: A tool handle having a central gripping portion joined with a pair of opposed fastening portions. The gripping portion has an internal shell with an overcoating. The overcoating is two-part having first and second external sections having at least one different characteristic. The first overcoating section is applied in a first mold and thereafter the resulting structure is placed in a second mold wherein molding material is flowed through a channel in the interior of said shell from an underside of the handle to an exterior surface of the shell. The first and second sections cooperate to produce a continuous overcoating having sections with different characteristics that are free from molding blemishes.

Abstract: The present invention is directed towards the hybrid combination of a drop gate injection molding system and a lattice gate. The lattice gate is located prior to the orifice of the drop gate. The lattice gate is comprised of a series of cross-direction flow channels through which the rubber flows, with mixing of the rubbers at the intersections of the flow channels. This hybrid molding system permits shorter cure times, and improved process cycle time for curing rubbers.

Abstract: An object of the present invention is to provide a method of double color-molding a key top that is superior in design. In order to achieve this object, according to the method of double color-molding a key top provided in the present invention, at a first shot, a light-permeable resin layer is injection-molded, and simultaneously, a convex portion that corresponds to a planar shape of a closed loop in a letter, figure, sign, etc., is formed on a back surface of the light-permeable layer. In a second shot, a light-shielding resin layer is injection-molded on both an outer region and an inner region which are defined by a convex pattern of the convex portion on the back surface of the light-permeable resin layer. Since a gate trace, which remains after performing the gate-cut on the light-shielding resin layer, resides inside the key top, it is invisible from the outside of the key top. In this way, the design of a key top can be improved.

Abstract: A device for molding a container is disclosed. The device will include a first member including an opening defined therein. A manifold member, operatively attached to the first member for channeling a plastic fluid to an insert means, is included. The insert means are positioned within the opening located within the first member, with the insert containing a first slide and a second slide. The first slide and second slide will have an extended position and a contracted position, and wherein the contracted position defines a cavity profile. The second member will have a first end that contains a plurality of core pins. A piston is adapted to the second end of the second member for reciprocating the second member into engagement with the insert so that the first slide and second slide are moved to the contracted position. During the reciprocating motion, the plurality of core pins are received in the cavity profile. The apparatus will further comprise heater means for suppling a heat to the fluidized plastic.

Abstract: An air deflector for attachment to a lower surface of a vehicle includes a first portion and a second portion attached to and extending downwardly from the first portion. The first portion is adapted to be attached to a lower surface of the vehicle and is formed of a first material having a first durometer value. The second portion is formed of a second material different from the first material. The second portion has a second durometer value less than the first durometer value.

Abstract: An apparatus and method for molding multi-material parts. The mold has a plurality of first mold cavities interspersed alternately among a plurality of second mold cavities. A first molten material is injected into the first mold cavities and solidified. Cores with the first material are moved only one mold pitch to the second mold cavities where a second molten material is injected and solidified with the first material to form the multi-material parts which are ejected from the mold when it is opened. In one embodiment, cavities and cores are arranged in a column, and dummy cores on each end of a column of cores close off the injection nozzle in an end cavity from which a core has been removed for a molding cycle. In another embodiment, cavities and cores are arranged radially, and cores are rotationally moved one mold pitch with each molding cycle.

Abstract: A toilet seat assembly 10 includes a toilet seat 12 having a seat skin 14 defining the exterior surfaces thereof and a seat core 16 disposed within and surrounded by the seat skin 14 and a cover 18 having a cover skin 20 defining the exterior surfaces thereof and a cover core 22 disposed within and surrounded by the cover skin 20. The assembly is characterized by the cores 16, 22 each comprising a waste material. The waste material may be a single polymer wasted in the process of making other products. Alternatively or in combination therewith, combining a plurality of different materials (including different polymers) from different sources may be employed to formulate the waste material.

Abstract: A luer connector assembly is provided for enhancing the frictional engagement between medical devices such as syringes and needle assemblies. The assembly needle includes a female luer fitting having a passageway and a relatively soft, resilient member bounding the passageway. The passageway is also bounded by the body of the fitting, which is harder than the soft, resilient member. A male luer fitting inserted into the passageway engages both the soft, resilient member and the body of the female luer fitting. A method of manufacturing such a connector assembly is further provided. A first material is injected into a mold to form the body of a female luer fitting, the fitting including a passageway and a recess extending into the body. A second material is then injected such that is extends into the recess and bounds the passageway. The second material, when cool, is softer than the first material.

Abstract: An in-mold coat-forming mold and an in-mold coat-forming method are provided, wherein the mold prevents leakage of a coating material for the long term, which is likely to occur when the in-mold coat-forming method is carried out.

Abstract: A method for polychrome plastic material injection molding in accordance with the present invention, in which, a molding board is provided with a plurality of cores, and the cores are each provided with a plurality of cavities. The cores rotated for exchanging the positions of the cavities and together with the rotation of the molding board, whereby permitting the injection of three different colored plastic materials into the cores respectively in turn, and then forming a triple colored plastic object.

Abstract: In order to produce a plastic part 5 that has an opaque body 1 and a front surface with at least one translucent area delineated from an opaque area, in a first step, a blank with a recessed volume 2 is formed by means of injection molding using an opaque plastic component. The recessed volume 2 extending from an opening in a face of the blank and inwardly of the blank corresponds in shape and position to the translucent area. In a second step, at least the face of the blank is over-molded with a layer of a coloured plastic component. Hereby, the opening in the face of the blank is over-spanned by a layer of this coloured plastic component being sufficiently thin to be translucent.

Abstract: A method of two-stage injection molding of an air conditioner outlet vent device is provided, the device including a housing, a plurality of blades pivotably supported by the housing and disposed in parallel to each other within the housing, and a link operatively connecting the blades. The plurality of blades are injection-molded in a secondary injection step subsequent to a primary injection step in which the housing is molded. In the secondary injection step, a molten resin is injected into cavities formed within a mold device in a closed mold state from a plurality of gates provided in portions of the mold device corresponding to projections of the blades. It is thus possible to improve the strength of link shafts and the projections while preventing any malfunction of the blades pivoting and any deterioration of the surface appearance, as well as to increase the degrees of freedom in changing the gate diameter.

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

Abstract: The present invention is a process for producing an injection-molded thermoplastic workpiece having a thermoset coating bonded thereto, comprising the steps of introducing in three stages into a closed mold a thermoplastic material, such as a polyolefin, heated to a temperature above its melting point and molding said material to form a workpiece; cooling the workpiece to a temperature less than its melt temperature introducing a thermoset coating composition into the closed mold to cover at least a portion of a surface of the workpiece. The mold is then opened and the workpiece is removed after the coating composition has at least partially cured. The invention is also directed to a molded article made by the described process.

Abstract: A plastic bowling pin and method for manufacturing the bowling pin uses a first mold 8 having first axial rods 9 and 10 displaceable into and from the first molding cavity along a longitudinal axis “a” and a second mold 15 having second axial rods 16 and 17 displaceable into and from the second molding cavity along a longitudinal axis “b”. Molding a core portion 2 by forcing the molten synthetic resin to be flowed into the first molding cavity of the first mold 8 after the first axial rods 9 and 10 have been inserted into the first molding cavity. Molding a skin layer 3 on the external surface of the molded core portion 2 by forcing the molten synthetic resin to be flowed into a space between the external surface of the molded core portion 2 and the second molding cavity of the second mold 15 after the molded core portion 2 has been positioned relative to the second molding cavity.

Abstract: An elastic doll capable of being bent at sites therein which are to be bent and kept from being bent at sites therein which are not to be bent, to thereby be deformed in a natural manner and capable of being downsized. The elastic doll includes a trunk (1), arms (2) and legs (3) in which a skeleton member (7) is embedded. The skeleton member (7) is constituted by first cores (8) made of metal and arranged at sites in the doll corresponding to joints and second cores made of rigid synthetic resin and arranged at sites in the doll corresponding to distal ends thereof and positions between joints adjacent to each other. The first cores (8) and second cores (9) are connected to each other, wherein the first cores (8) are covered with synthetic resin (6a) as required. The skeleton member (7) is covered with a skin/flesh member (6) made of soft synthetic resin.

Abstract: Sleeve molding apparatus and methods for making multi-layer injection molded plastic articles in successive mold cavities. In a first molding step, an inner sleeve is molded on a core in a first mold cavity, which may comprise a full body length sleeve or only a partial sleeve, such as an upper neck finish portion. The sleeve and core are withdrawn from the first mold cavity while the sleeve is still warm, and transferred without substantial delay to a second mold cavity for injection molding an outer layer which bonds to the inner sleeve. By transferring the sleeve at an elevated temperature into the second mold cavity, an improved bond is formed between the inner sleeve and outer layer which resists separation during a later reheat stretch blow molding step, and/or in use of the resulting article. In a preferred embodiment, a pasteurizable beer container is provided having a finish-only sleeve of a PEN polymer.

Abstract: A process for producing a composite molded article is described. The composite molded article includes: (i) at least one base body (1) having a contoured surface; (ii) at least one first thermoplastic part (4, 5, 6); and (iii) at least one second thermoplastic part (2, 3), each of the first and second thermoplastic parts being joined to the base body. The process includes, (a) providing a multicomponent injection molding tool (20) having at least two separate melt flow-way systems and at least two cavities in which each of the first and second thermoplastic parts are separately formed, each of the cavities are in separate communication with each of the separate melt flow-way systems. The base body is placed into the molding tool in a second step (b). The cavities of the mold are separated from each other by a combination of the contoured surface of the base body and sealing edges of the molding tool that abut the contoured surface of the base body.

Abstract: A method of manufacturing a semiconductor mounting board includes providing a base member and linear conductive members formed of metallic wires. The conductive members are constructed so that they extend linearly between a semiconductor element-mounting face and a circuit board-mounting face of a base member, and are integrally molded within the base member. For this purpose, a resin material for forming the base member is injected into a mold wherein the conductive members are linearly arranged beforehand.

Abstract: The nozzle is constituted by a nozzle body and a connecting block. The nozzle body is constituted by a casing and a core. A first passage is formed in the center of the core and a second passage is formed between the external surface of the core and the internal surface of the casing. The first passage and the second passage join together in front of the core and then lead to a discharge port at the tip end of the casing. In the interior of the connecting block are formed a first supply line and a second supply line. The first supply line connects a sub injection unit to a first supply port, and a first stop valve is provided within the line. The second supply line connects a main injection unit to a second supply port, and a second stop valve is provided within the line.

Abstract: A mask that communicates a flow of breathing gas with an airway of a user is formed by a two-shot injection molding process. The mask includes a mask body and a mask seal member, at least a portion of which is molded to the mask body by a two-shot injection molding process while the mask body is cooling and incompletely cured. The mask seal member, or a portion thereof, is molecularly bonded to the mask body as a consequence of the two-shot injection molding process.

Abstract: A system and method are provided in which the rate of material flow to a plurality of gates can be controlled by a single controller. According to one embodiment, material is provided to first and second runners, the first runner comprising a plurality of distribution nozzles, and the flow to the first runner being controllable independently of the flow to the second runner.

Abstract: To control the thickness of the skin layer of a composite resin molded product by a viscosity difference obtained by varying the viscosity by adding another ultra-minute substance to a raw resin material.

Abstract: The present invention relates to a method for manufacturing a large FRP member and has the following structure.

Abstract: A method of forming a trade mark decoration on a soft ribbon stripe comprising the steps of thermal pressing a combination end of the ribbon stripe to cure the texture of the ribbon stripe and increase the gaps of the texture; fastening the combination end onto a mold; mixing ejection molding material with a material similar or alike the material of the ribbon stripe so that these materials can form as one unit when melt; high pressure ejection molding the ribbon stripe to combine with a primary blank plastic material and a produced trade mark pattern being formed on the primary blank plastic material; placing the first ejection molded primary blank plastic material into the mold for second ejection molding and the protruded trade mark pattern being located at a recess of the second mold; and processing to a second ejection molding to enclose the primary blank plastic material at the exterior thereof to form an ornamental article.

Abstract: An injection-molded plastic part having a first thermoplastic component and a second thermoplastic component. Areas consisting of the first thermoplastic component are present at least on one surface of the injection-molded plastic part next to areas of the second thermoplastic component. The first thermoplastic component is an LCP and the second thermoplastic component is a syndiotactic polystyrene.