Abstract: A method for forming a golf ball with a graphene core disclosed herein. The method includes mixing a graphene masterbatch material with a polybutadiene material to form a core mixture, wherein the graphene masterbatch material comprises graphene in an amount from 0.1 to 80.0 weight percent of the graphene masterbatch material mixed with a carrier polymer in an amount from 99.9 to 20 weight percent of the graphene masterbatch material.

Abstract: Disclosed is a cooled airfoil having a hub end and tip, an airfoil height being defined between the hub end and the tip. The airfoil has a leading edge, trailing edge, suction side and pressure side. The airfoil has a first airfoil height section adjacent the hub end and extending towards the tip, wherein, in a meridional view, the leading edge and trailing edge are straight along the first airfoil height section. The airfoil has a second airfoil height section adjacent the tip and extending towards the hub end, wherein, in a meridional view, the airfoil is concavely shaped at the leading edge and is convexly shaped at the trailing edge along the second airfoil height section. At least one cooling channel has a length principally extending along the airfoil height, extends straight in a first cooling channel length section, and is bent in a second cooling channel length section.

Abstract: A co-injection nozzle for an injection moulding device for producing multi-layered injection-moulded products. The nozzle includes: a central bore; a valve needle for opening and closing a nozzle opening; an annular inner melt channel for the first melt; an annular central melt channel for a second melt; and an annular outer melt channel for the first melt, the inner, central and outer melt channels being fluidically combined in the nozzle tip to form a concentrically-layered melt stream. The nozzle further includes a nozzle body and a melt runner insert having the central bore of the nozzle. The melt runner insert has a circular cylindrical section, by which the insert is held in a central bore of the nozzle body. At least one distribution channel for the first melt and at least one distribution channel for the second melt are formed in the outer surface of the circular cylindrical section, with the distribution channels running substantially in the axial direction.

Abstract: A process includes: supplying a main resin from outer and inner flow channel, to a joined flow channel at a predetermined supply velocity for a predetermined time; supplying a second resin from a middle flow channel to the joined flow channel simultaneously with the main resin at a predetermined supply velocity for a certain time within the predetermined time; and sliding a shut-off pin to bring the pin forefront to a predetermined position near an outlet of the inner flow channel, open to the joined flow channel, before the second resin is supplied, or during a time starting after a time from the start of the second resin supply and ending with the termination of the supply, so that the velocity of main resin supply from the inner flow channel to the joined flow channel is reduced to a predetermined level by adjusting the degree of aperture for the outlet.

Abstract: An injection molding apparatus comprising an injection molding machine, a manifold, a closure valve pin, a first actuator having a linear or axial driver, a second actuator comprising a rotor interconnected to either the closure valve pin or to a second valve pin such that either the closure valve pin or the second valve pin is rotatably driven in unison with the rotor around the rotation axis, the closure pin or second pin being disposed and rotatable within the flow of injection fluid flowing through a flow channel leading to a mold cavity.

Abstract: The invention relates to a mold for fabricating a spiral-shaped gasket made out of plastics material, the mold including at least one spiral-shaped cavity and, for the purpose of feeding molten plastics material, also including two distinct ingates, these ingates being arranged on the same face of a cavity.

Abstract: The present invention relates to a method and to an apparatus for producing plastic products with an integrated reinforcing structure. To do so, a flexible fabric is first placed onto a surface of a cavity of a mold and is successively coated with plastic on the various sides.

Abstract: A mold includes a top portion, and an edge ring having a ring-shape. The edge ring is underlying and connected to edges of the top portion. The edge ring includes air vents. The edge ring further encircles the inner space under the top portion of the mold. A plurality of injection ports is connected to the inner space of the mold. The plurality of injection ports is substantially aligned to a straight line crossing a center of the top portion of the mold. The plurality of injection ports has different sizes.

Abstract: The invention provides a mold for injection-molding a golf ball, which mold has a cavity inner wall with a vertical diameter connecting both poles in a vertical direction thereof that is longer than a horizontal diameter connecting both poles in a horizontal direction thereof. A method of manufacturing golf balls using such a mold is also provided. The use of this mold eliminates molding problems that arise when molding the outermost cover layer of a golf ball, enabling the cover to be stably molded and also making it possible to easily and reliably obtain golf balls of high symmetry in which a cover of uniform thickness has been formed.

Abstract: An injection nozzle that can be used in an injection blow molding system without use of an external heat source comprises a two-piece structure broadly including a structural outer body for coupling the nozzle to a resin manifold and a thermally conductive insert. At least a portion of an axial length of the insert has an outer diameter that is less than an inner diameter of a coinciding coaxial portion of the outer body, such that the differences in the inner and outer diameters present an insulating air gap along at least a portion of the nozzle length. A sufficient operating temperature for hot melt resin can then be obtained without use of the external heat source.

Abstract: Disclosed herein are an injection foam molding apparatus for manufacturing one-piece shoes or soles and one-piece shoes manufactured using the same. A thermoplastic resin is injected into top and bottom molds in a state in which the top and bottom molds are coupled with a middle mold and is then pressed to form the upper and lower parts of a shoe, the middle mold is separated therefrom, and then the top mold and bottom mold, including the upper part and lower part of the shoe, respectively, are pressed, thereby forming the upper part and lower part of the shoe into one body. The injection foam molding apparatus is advantageous in that, since functional one-piece shoes or soles, having various colors, hardnesses and specific gravities, and having excellent feeling and durability, can be manufactured using different materials by one apparatus, working time is decreased, and productivity can be increased.

Abstract: The disclosure provides a golf ball mold that may produce a golf ball with a reduced gate defect. The golf ball mold may have a mold cavity having a mold chamber including a surface shaped as the inverse of a substantially hemispherical shape and a parting edge disposed along the perimeter of mold chamber. At least one gate may be disposed on the parting edge to provide a path for a cover material to be injected into the mold chamber. The gate may include a flat middle surface connected by a first side surface and a second side surface disposed opposite the first side surface. A round having a radius of curvature ranging from about 0.2 mm to about 0.5 mm may be disposed along a middle gate edge of middle surface and/or a side gate edge of one of the first side surface and the second side surface.

Abstract: A method for filling a mold with a compressible liquid material is disclosed. The mold is connected to a manifold via a plurality of runners, with at least one valve disposed in at least one of the plurality of runners. A controller is configured to pressurize the manifold with the liquid material, and modulate the at least one valve to perform a plurality of pulse cycles during one filling cycle of the mold. A pulse cycle includes adjusting an aperture of the valve from a first position to a second position, and adjusting the aperture of the valve from the second position to a third position, where the aperture corresponding to the second position is larger than the aperture corresponding to the first position, and the aperture corresponding to the third position is smaller than the aperture corresponding to the second position.

Abstract: A hot runner apparatus includes a mold plate defining a pocket; a plurality of sub-manifolds; and a bridge manifold positioned in the pocket and between the sub-manifolds. The bridge manifold and the sub-manifolds are oriented in a common plane. The bridge manifold receives a melt from a melt source. Each of the sub-manifolds is coupled to the bridge manifold to receive the melt from the bridge manifold via a junction between an opening of a network of melt channels within the bridge manifold and an opening of a network of melt channels within each of the sub-manifolds. The sub-manifolds are urged against the bridge manifold to form a seal therebetween, when the bridge manifold and the sub-manifolds thermally expand urging the sub-manifolds against contact regions of a pair of opposing walls of the pocket. The respective opposing walls define a hollow region separated from the respective contact regions by a wall portion.

Abstract: Method and apparatus for sequentially delivering multiple shots of polymer material to a plurality of mold cavities to form multilayer articles. A first shot of greater than 50% of the total article weight of a first polymer material is simultaneously delivered to a plurality of mold cavities using, at each cavity, a chamber of predetermined volume that is prefilled with the first polymer material. A second shot of no greater than 10% of the total article weight of a second material is simultaneously delivered to all of the cavities beginning subsequent to the step of delivering the start of the first shot delivery step. The second shot of second material is delivered through a manifold channel that fluidly communicates with each cavity, and is injected to all cavities under pressure exerted by a source of the second material that is common to all of the plurality of cavities.

Abstract: A mold-tool system (100), having a one-piece manifold assembly (102) is provided. The one-piece manifold assembly (102) has: a plurality of inlets (104); and a plurality of outlets (106) spaced apart from the plurality of inlets (104). A plurality of melt channels extend between the plurality of inlets and the plurality of outlets, and each melt channel extends between a single inlet and at least two outlets such that each inlet (104) is in fluid communication with at least two outlets (106).

Abstract: An apparatus for molding a thermoplastic package part(s) to an end portion of a container body includes inner and outer mold elements between which a mold cavity per package part is formed. At least one of these mold elements is at least partly freely suspended. When one package part is molded with the mold elements, plastic melt is injected in a first number ?1 of points in the cavity, an island of plastic melt for each point is formed inside the cavity, and the distribution of the points causes a force center to pass through a surface defined by a parallel projection of each first number of islands on a plane orthogonal to a direction of the compression force, and when the first number >1, a second number of imaginary straight lines interconnecting a third number of parallel projections such that the surface is at its maximum.

Abstract: A mold for molding an injection molded article comprises a mold cavity with a non-symmetrical portion. At least one flow leader in the non-symmetrical portion of the cavity produces a symmetrical flow boundary in a multilayer flow downstream of the non-symmetrical portion of the mold cavity. The at least one flow leader may be a variable thickness flow leader or may alternatively be a plurality of flow leaders having a flow path length that differs from the flow path length of an adjacent flow leader by no more than about 15%. The multilayer flow comprising an inner layer, an outer layer, and an interior layer. Co-injection molding apparatus and methods that may use the foregoing mold are disclosed. Similarly, co-injection molded articles and containers that may result from the foregoing mold, apparatus, and methods are disclosed.

Abstract: A multi-axis injection molding apparatus is provided with a fixed platen, a movable platen, a plurality of injection devices, and an intermediate platen disposed between a fixed mold and the fixed platen. The intermediate platen includes a runner adapted to supply a molten resin from a single in-line injection apparatus to the plurality of injection devices.

Abstract: An injection molding die for producing a molded product having an appearance surface, an injection molding method for producing a molded product having an appearance surface, and a resin molded product molded by the injection molding method which is free from occurrence of appearance deficiency such as a flow mark or the like that is a drawback in appearance. A molten thermoplastic resin material is injected into a cavity defined by a molded product's appearance surface forming portion (4a) and a molded product's rear surface forming portion (6a) through one or more direct gates and one or more hot runners to fill the cavity with the molten resin material, thereby performing injection molding.

Abstract: An injection molding system is disclosed that includes a hot runner manifold for providing a melt stream of moldable material to at least one hot runner nozzle that is in fluid communication with one or more mold cavities via at least one injection manifold disposed proximate a downstream end of the nozzle. The at least one injection manifold has a substantially U-shape with at least one mold cavity being disposed between opposing arm segments thereof. Each mold cavity is fed by a pair of nozzle seals, wherein one of the pair of nozzle seals extends inwardly from one of the opposing arm segments while the other of the pair of nozzle seals extends inwardly from the other of the opposing arm segments for directing a melt stream into the mold cavity.

Abstract: An injection nozzle that can be used in an injection blow molding system without use of an external heat source comprises a two-piece structure broadly including a structural outer body for coupling the nozzle to a resin manifold and a thermally conductive insert. At least a portion of an axial length of the insert has an outer diameter that is less than an inner diameter of a coinciding coaxial portion of the outer body, such that the differences in the inner and outer diameters present an insulating air gap along at least a portion of the nozzle length. A sufficient operating temperature for hot melt resin can then be obtained without use of the external heat source.

Abstract: A mold for molding an injection molded article comprises a mold cavity with a non-symmetrical portion. At least one flow leader in the non-symmetrical portion of the cavity produces a symmetrical flow boundary in a multilayer flow downstream of the non-symmetrical portion of the mold cavity. The at least one flow leader may be a variable thickness flow leader or may alternatively be a plurality of flow leaders having a flow path length that differs from the flow path length of an adjacent flow leader by no more than about 15%. The multilayer flow comprising an inner layer, an outer layer, and an interior layer. Co-injection molding apparatus and methods that may use the foregoing mold are disclosed. Similarly, co-injection molded articles and containers that may result from the foregoing mold, apparatus, and methods are disclosed.

Abstract: One or more nozzles define separate nozzle channels. The nozzles are coupled to a manifold, so that each of the nozzle channels communicates with a different mold gate. A molding material distribution insert is coupled to the manifold and has a body defining a distribution channel and a plurality of drop channels equal in number to the nozzle channels. The distribution channel is an open distribution channel formed on an outer surface of the body and enclosed by the manifold. The drop channels intersect the distribution channel and exit the body at a different one of the nozzle channels. A valve pin bushing can extend into the drop channels. Valve pins can extend from actuators, through the valve pin bushing and the drop channels, and to the mold gates. A valve pin holder can be coupled to the actuator and coupled to heads of the valve pins.

Abstract: An injection molding system of plastic material, includes a press having first and a second pressure plates, suitable for closing between them a mold, by applying a closing force, and a distribution and injection assembly suitable for distributing and injecting a fluid plastic material into the mold and in turn comprising an intermediate hot distribution plate interposed between a bottom plate and a nozzle-bearing plate, provided for cooperating into contact and in sliding relationship, along a respective sliding and contact surface with the end of one or more injection nozzles fixed on the nozzle-bearing plate, in order to distribute the fluid plastic material to be injected into the mold, wherein the distribution and injection assembly is arranged adjacent to and along a side of the mold, not associated with the first and the second pressure plates so as not to be subject to the closing force of the mold.

Abstract: An example molding method includes: feeding a molten foamable resin by injection in a cavity formed in a molding die; allowing the molten foamable resin to flow in the cavity; and foaming and solidifying the molten foamable resin to mold a resin foam product. The example molding method performs flow rate control by controlling a flow rate of the molten foamable resin at a welding portion to be equal to or higher than a flow rate of the molten foamable resin at an upstream portion adjacent to the welding portion.

Abstract: A color changing apparatus of an injection molding hot runner die which is simple in construction and easily capable of changing colors for molding products without removing and replacing a hot runner. In the apparatus, a passage for supplying a melted resin to a molding die, a divided type hot runner block is provided with hot runners each for exclusive use of each of molding colors, sprues and nozzles being in communication with the hot runners. A moving device is provided for moving the molding die, which is united with the divided type hot runner block, along with the divided type hot runner block. A positioning device is adapted to place the molding die in position in a state where either of the sprues of the divided type hot runner block is moved by the moving device to a position opposed to an injection nozzle for injecting the melted resin.

Abstract: The present invention relates to a position adjusting means for hot runner nozzles comprising a main inlet, a manifold, a rotational transitional piece and a nozzle; the rotating transitional member is disposed with an inlet and an outlet; the inlet and the outlet of the rotating transitional member each has a symmetry axis and the two symmetry axes are disposed in parallel with and spaced apart from each other for a particular distance; the inlet of the rotating transitional member and the outlet of the manifold are connected to each other in a rotatable and sealed manner; the outlet of the rotating transitional member and the inlet of the nozzle are connected to each other in a rotatable and sealed manner; the nozzle or a nozzle assembly formed by the nozzle and a nozzle extension member of the nozzle combining together is disposed with an inlet and an outlet; the inlet and the outlet of the nozzle or the nozzle assembly each has a symmetry axis and the two symmetry axes are disposed in parallel with and sp

Abstract: A first mold has a core passage, and first and second cavities in fluid communication with each other at the core passage. A second mold has first and second nozzles therein that inject first and second resins to the first and second cavities, respectively. The core member is slidable within the core passage to provide or block the fluid communication between the cavities, and has a third nozzle therein to inject a third resin to the core passage. The first and second resins are injected into the cavities. The core member is moved to block the fluid communication between the cavities, before injecting the first and second resins is completed. The third resin is injected while moving the core member to provide the fluid communication, after injecting the first and second resins is completed. The molds are separated, thereby yielding a single molded product, such as a vehicle door trim.

Abstract: An apparatus for molding optical fiber connector is provided. The optical fiber connector includes a main body. The main body has a blind hole for receiving an optical fiber two opposite surfaces being substantially parallel with the blind hole, and a lens portion aligned with the blind hole. The apparatus comprises a molding cavity and an insert for forming the blind hole. The molding cavity includes a central portion for forming the main body, a lens-forming portion for forming the lens portion, and two lateral portions for forming the corresponding surfaces. The molding cavity includes a first gate and a second gate for introducing molding material into the molding cavity. The first gate is located between the insert and one of the two lateral portions and the second gate is defined between the insert and the other one of the lateral potions.

Abstract: A method of making a plastic wheel (105) having a plurality of spokes (155) includes the step of injecting melted plastic material into a mold, wherein the melted plastic material is injected into the mold in regions corresponding to every spoke of the wheel to be formed. Molding equipment is also provided to carry out the method.

Abstract: A plastic injection mold for molding a plastic article includes an upper insert and a lower insert. The upper insert and the lower insert match with each other to define an annular mold cavity in between. An annular gate communicates with the mold cavity to allow molten plastic material to flow into the mold cavity to mold the article. An annular runner is connected with the annular gate for injecting molten plastic material to the annular gate. Molten plastic material will evenly flow into the mold cavity of the plastic injection mold through the annular gate to mold the plastic article, which prevents the plastic article from being disfigured, decreasing the number of defective products and improving the product quality.

Abstract: The mold for in-mold coating formation is one including a mold main body 30 having, provided thereinside, a mold cavity 5 permitting injection molding of a resin molding with coated surface and a coating material injecting unit 50 capable of injecting a coating material to an area corresponding to the coated surface of the resin molding, within the mold cavity 5, in which a groove portion 3 of 0.3 to 1 mm width (W) is provided on the peripheral edge 15 of the mold, and in which the angle (?1) made by the inner circumferential surface 25 of the mold and the mold-opening-side internal wall surface 27 of the groove portion 3 is in the range of 30° to 70°.

Abstract: Method and apparatus for sequentially delivering multiple shots of polymer material to a plurality of mold cavities to form multilayer articles. A first shot of greater than 50% of the total article weight of a first polymer material is simultaneously delivered to a plurality of mold cavities using, at each cavity, a chamber of predetermined volume that is prefilled with the first polymer material. A second shot of no greater than 10% of the total article weight of a second material is simultaneously delivered to all of the cavities beginning subsequent to the step of delivering the start of the first shot delivery step. The second shot of second material is delivered through a manifold channel that fluidly communicates with each cavity, and is injected to all cavities under pressure exerted by a source of the second material that is common to all of the plurality of cavities.

Abstract: A method of manufacturing a manifold assembly (22) in accordance with specifications required by a mold is provided. The method includes selecting a manifold (22) from a predetermined set of manifolds (22) and sub-manifolds (24) selected from a predetermined set of sub-manifolds (24). Both the manifolds(22) and the sub-manifolds (24) are at least partially manufactured to define first and second portions of the melt channels (28). Injection nozzles (26) are also selected for each sub-manifold (24), defining third portions of the melt channels (28). The manifold (22), the at least one sub-manifold (24) and the injection nozzles (26) are arranged and assembled together so that the first portions, the second portions and the third portions of the melt channels (28) cooperatively define the melt channels (28) operable to direct a melt material to gates located in the mold. The invention further includes a manifold assembly manufactured using the methods described herein.

Abstract: An RTM molding method includes disposing a reinforcing fiber substrate in a cavity of a mold consisting of a plurality of dies, clamping the mold, and thereafter injecting resin to complete molding, characterized in that divided areas with respect to the surface direction of the reinforcing fiber substrate are assumed, each divided area is one in which injected resin expands over the entire surface in the area and can be substantially uniformly impregnated in the thickness direction of the substrate, and resin introducing paths are formed for respective assumed divided areas for introducing the injected resin into the respective divided areas; and an RTM molding device. When a relatively large molded product is to be molded, a molding step from resin injection to impregnating/curing can be implemented at high speed without generating a non-resin-flowing area, thereby enabling a high-quality molded product to be produced free from voids, etc.

Abstract: Methods for forming a keyboard case are provided. A mold cavity configured to provide a keyboard case having a plurality of apertures disposed therethrough can be at least partially filled with a molten material. At least one runner can traverse at least a portion of the apertures forming the plurality of apertures. The molten material can be at least partially solidified within the mold cavity to provide the keyboard case. The keyboard case can be removed from the mold cavity and the at least one runner can be removed from at least a portion of the apertures forming the plurality of apertures.

Abstract: A food patty molding machine has a reciprocating mold plate. A moldable food product is pumped through a fill passage into cavities of the mold plate when the mold plate is in its fill position. A fill plate, interposed in the fill passage immediately adjacent the mold plate, has a multiplicity of fill orifices distributed in a predetermined pattern throughout an area aligned with the mold cavity when the mold plate is in its fill position. The fill orifices define paths through the fill plate, wherein the paths each have an inlet portion that is perpendicular to a fill side face of the mold plate that is connected to an outlet portion that is obliquely angled to a fill side face of the mold plate. A seal-off stripper plate is interposed in the fill passage immediately adjacent the face of the fill plate opposite the mold plate. The stripper plate is movable along a path transverse to the mold plate path between a fill location and a discharge location.

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

Abstract: The present invention relates to a method and a system for preparing dental restorations from ceramic or polymeric material to achieve color and opacity gradients simulating natural dentition, wherein an ingot of ceramic or polymeric material is entirely or partially forced through a system of channels in a press mold into a mold cavity in the press mold, wherein the mold cavity corresponds to a dental restoration.

Abstract: An injection molding apparatus having a sealing arrangement between a hot runner manifold and edge-gated nozzle that accommodates thermal expansion during operation is disclosed. A spacer element is axially fixed in position between the manifold and a mold plate in which the nozzle sits. The nozzle includes a reduced diameter spigot portion on an upstream end that is in a telescopic/slidable relationship with a bore of the spacer element. The nozzle includes radially extended nozzle tips axially fixed in position at a downstream end of the nozzle that are in fluid communication with respective mold gates and corresponding mold cavities. In the cold condition, a gap G exists between a shoulder of the nozzle proximate the spigot portion and a corresponding surface of the spacer element bore. Under operating conditions, thermal expansion of the nozzle is accommodated in a direction of the manifold by the gap.

Abstract: An apparatus manufactures a composite product having a first molding product and a second molding product. The second molding product is supported by the first molding product through a supporting member. The apparatus includes a molding die, and an injection molding machine supplying a mold material into the molding die. The molding die includes a first cavity for molding the first molding product, a second cavity for molding the second molding product, a first passage for introducing a molding material into the first cavity from the injection molding machine, and a second passage for introducing a molding material in the first cavity into the second cavity.

Abstract: An exemplary injection mold for making wedge-shaped light guide plate includes a molding assembly with a mold cavity defined therein, and a first sprue and a second sprue in communication with the mold cavity. The mold cavity is wedge-shaped and comprises a thick end and a thin end opposite to the thick end. The first and second sprues are configured for introducing a molding material into the mold cavity. The first sprue is located at the thick end of the mold cavity, and the second is located at the thin end thereof.

Abstract: One or more nozzles define separate nozzle channels. The nozzles are coupled to a manifold, so that each of the nozzle channels communicates with a different mold gate. A molding material distribution insert is coupled to the manifold and has a body defining a distribution channel and a plurality of drop channels equal in number to the nozzle channels. The distribution channel is an open distribution channel formed on an outer surface of the body and enclosed by the manifold. The drop channels intersect the distribution channel and exit the body at a different one of the nozzle channels. A valve pin bushing can extend into the drop channels. Valve pins can extend from actuators, through the valve pin bushing and the drop channels, and to the mold gates. A valve pin holder can be coupled to the actuator and coupled to heads of the valve pins.

Abstract: A mold (1) includes an upper mold half (U) and a lower mold half (L). The mold (1) includes a gate (G), a pole vent pin (P), a support pin (S) and an intermediate vent pin (M). The support pin (S) has a latitude (?s) of 45 degrees to 85 degrees. Each of the upper mold half (U) and the lower mold half (L) has at least three support pins (S). The intermediate vent pin (M) has a latitude (?m) of 45 degrees to 85 degrees. Each of the upper mold half (U) and the lower mold half (L) has at least three intermediate vent pins (M). A difference between the latitude (?m) of the intermediate vent pin (M) and the latitude (?s) of the support pin (S) is equal to or smaller than 15 degrees. A clearance between the intermediate vent pin (M) and a pin hole (13) is 5 ?m to 50 ?m. By the mold (1), a cover having a thickness of 1.4 mm or less is formed.

Abstract: The present invention relates to a method for preparing dental restorations from ceramic or polymeric material to achieve color and opacity gradients simulating natural dentition, wherein an ingot of ceramic or polymeric material is entirely or partially forced through a system of channels in a press mold into a mold cavity in the press mold, wherein the mold cavity corresponds to a dental restoration.

Abstract: A mold for injection molding and a molding method using the same, in which multiple gates are provided to a curved runner, thereby easily molding a product having a complicated shape and a large width, and in which a plurality of curved runners are provided, thereby easily ejecting forms that are filled in the runners. The mold includes first and second molds defining a mold cavity, a first gate disposed at a first position of the mold cavity, a second gate disposed at a second position of the mold cavity spaced apart from the first position, a first curved runner provided to the second mold so as to be connected to the first gate, and a second curved runner provided to the second mold so as to be connected to the second gate. The first and second curved runners have inlets that are connected with each other, and cross-sectional areas that are gradually reduced from the inlets to the first and second gates.

Abstract: A vehicle bumper (20) integrates rigid and flexible components into a single co-injection molded structure. In a preferred embodiment, a flexible fascia (58) is provided with integrated rigid fastener brackets (62, 66, 70, 71), energy absorption structure and head lamp brackets and housings (62). A method for manufacturing such a bumper provides for the injection of two different plastic materials during the same molding process. The flexible plastic material first injected into the mold. Then, the rigid plastic material is injected at gates located where the rigid material is desired. In one embodiment, the rigid material is completely contained within the flexible material. The rigid material may be either a higher stiffness plastic or a fiber reinforced plastic.

Abstract: One or more nozzles define separate nozzle channels. The nozzles are coupled to a manifold, so that each of the nozzle channels communicates with a different mold gate. A molding material distribution insert is coupled to the manifold and has a body defining a distribution channel and a plurality of drop channels equal in number to the nozzle channels. The distribution channel is an open distribution channel formed on an outer surface of the body and enclosed by the manifold. The drop channels intersect the distribution channel and exit the body at a different one of the nozzle channels. A valve pin bushing can extend into the drop channels. Valve pins can extend from actuators, through the valve pin bushing and the drop channels, and to the mold gates. A valve pin holder can be coupled to the actuator and coupled to heads of the valve pins.

Abstract: An injection molding apparatus having a manifold and several manifold melt channels communicating with several hot runner nozzles includes a melt redistribution element. The melt redistribution element is placed at specific locations along the melt channels to balance the uneven shear stress profile accumulated during the flow of a melt along the manifold channels. The melt redistribution element has an unobstructed central melt bore having at its inlet a narrowing tapered channel portion. The melt redistribution element also includes a helical melt pathway portion that surrounds the central melt bore. The incoming melt is first subjected to a pressure increase by the tapered portion that causes the melt to flow at a higher velocity through the central melt bore. The outer portion of the melt is forced to flow along the helical path and thus it changes direction multiple times and partially mixes with the melt flowing through the central melt bore.