Abstract: A process for the fabrication of a molded part with circular cross section and a hollowed-out cylindrical base body. An inner channel of the molded part, designed for the sealing with a connector part, has segments with various functions in axial direction. A fiber containing plasticized polymeric mass is injected into the cavity of a molding tool, and following hardening of the polymeric mass, the molded part is removed from the tool. In order to improve strength in a reliable manner, injection into the cavity is carried out radially from the inner channel towards the exterior, in a segment, or in an area of a segment, that does not serve for the mounting of a circumferential seal, or the mounting, and/or arrest of the connector part.

Abstract: Methods and apparatus adjustably control the repositioning of non-homogeneous fluid conditions across the stream of a laminar flowing fluid to a desirable circumferential position. The invention is particularly applicable to controlling non-homogeneous melt conditions at about the intersection of two flow channels in systems having hot or cold flow channels. Various mechanisms are provided that enable simple adjustments of a flow diverter within a fluid rotation device, making either static or dynamic adjustments, so that the degree of fluid flow repositioning in a runner system can be changed without the need for mold disassembly or retooling. Various forms of actuators effect adjustment and may be manually manipulated or manipulated through various powered devices.

Abstract: An injection molded article obtained by injection molding a thermoplastic resin composition comprising 100 parts by mass of a thermoplastic resin and 50 parts by mass or less of at least one of a filler and a colored metallic pigment, wherein at least one weld exists, and a long diameter of 95% by mass or more of the filler existing within a cross-sectional depth of 50 ?m or less from a surface of the weld is parallel to the surface of the weld.

Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.

Abstract: A method for manufacturing a stress-resistant part made of a composite material, wherein the composite material is forced to flow in a channel belonging to a mold and delimited by a selectively heated wall, the fibers of the composite material assuming a statistically preferential orientation by means of the flow. The composite material comprises a thermosetting resin, the flow of this material in the channel and the heating of the wall of the channel are concomitant, and the temperature of the channel and the flow velocity of the composite material in the channel are determined with respect to each other so that the composite material flowing in this channel forms a fluid line, the mean cross-section of which decreases during the flow of this material in said channel due to the polymerization of the resin.

Abstract: A container or tray having various features. Also, the invention is generally directed to a method of forming the container or tray and a tool or apparatus for forming the container or tray.

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 may produce 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 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: The dimensions of a portion of an injection molded hollow product formed in a mold cavity between a first cavity surface of a cavity section and a first core surface of a core section are adjusted by adjusting the position of the first cavity surface relative to the position of the first core surface so that the first cavity surface and the first core surface are in a selected relative position when the cavity section is combined with the core section and a protractible and retractable core part is protracted so that a cavity abutment mold part can be connected directly to the protracted core part and the cavity abutment mold part also can be connected indirectly to the protracted core part by a series consisting of abutting mold parts. This series includes a pair of abutting rotatable eccentric rings, which are rotated to adjust the relative positions of the first cavity surface and the first core surface.

Abstract: The present disclosure is generally directed to a resin composition containing a mixture of high temperature polymers and at least one stabilizer. The stabilizer serves to prevent the polymers from adversely interfering with each other during melt processing. In one embodiment, the high temperature polymers present in the composition may comprise a mixture of an aromatic polyester polymer and a polyarylene sulfide polymer. The stabilizer comprises a phosphite stabilizer. The composition produces molded articles having better thermal stability and reduced mold deposits.

Abstract: The present invention is premised upon an inventive method of producing an over-molded edge portion on a flexible substrate, wherein the edge portion is void of open areas due to support devices in the mold cavity.

Abstract: This disclosure relates to polyarylene sulfide that may exhibit excellent processability at low temperature, decrease outgassing and flash or burr generation, and thus may satisfactorily mold a product requiring high molding accuracy, and a method for preparing the same. Specifically, the polyarylene sulfide includes an arylene sulfide repeat unit and an arylene disulfide repeat unit, wherein the weight ratio of the arylene sulfide repeat unit:arylene disulfide repeat unit is 1:0.0001 to 1:0.05.

Abstract: A plastic part is formed with a hollow portion and an integral evacuation channel extending from the hollow portion to a gate at which plastic for the part was injected. During the injection molding process for the part, the channel and portion to be hollowed are filled with molten plastic, and a gas is injected into the portion to be hollowed to force molten material from the portion to be hollowed back through the channel.

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 method of molding a valve lifter guide includes determining a flow path of injected material in the mold cavity by including a thin walled section in the formed guide. A leading edge of the material flow path forms a dam when crossing a thin walled section in the mold cavity to change a direction of a portion of the leading edge of the material flow path, until the leading edge meets a trailing edge of the material. The valve lifter guide includes a front wall, rear wall, a first radiused end wall, a second radiused end wall, and a bottom surface having an elongated socket. A tab extending from the valve guide support member has a first projection. The valve guide support member is disposed between the engine block and a cylinder head and the first projection is received in an opening of the engine block.

Abstract: A fluid spray head comprising an expulsion channel provided with a spray orifice (1) and a spray profile (10) formed in an end wall of said expulsion channel, said spray profile (10) comprising non-radial spray channels (11) opening out to a central spray chamber (12) disposed directly upstream from said spray orifice (1), the central axis (X) of said spray orifice (1) being offset from the central axis (Y) of the spray chamber (12) by a distance that is less than 0.12 mm, and preferably less than 0.08 mm.

Abstract: To form gaskets on both sides of a base material (5) without burrs, a first cavity (14) formed between the base material (5) and a first split mold (11) to have a molding material-supplying gate (11b) and a second cavity (15) formed between the base material (5) and a second split mold (12) communicate through a first communicating hole (51) provided in the base material (5), and there are formed in the first split mold (11) a first air vent hole (11c) open to a confluent portion of a molding material in the first cavity (14) and a second air vent hole (11d) which is positioned at and open to a second communicating hole (52) provided in the base material (5) at a confluent portion of the molding material in the second cavity (15), so as to be away from the surface of the base material (5).

Abstract: A runner system for a molding apparatus comprises a plurality of runner networks, each runner network further comprising a mold supply pot having a first side and a second side opposite to the first side. A plurality of molding cavities are located on the first and second sides of the mold supply pot, and a plurality of runners are operative to channel molding compound from each mold supply pot to the plurality of molding cavities. At least one of the mold supply pots comprises a different number of runners located on the first side which are connected to the mold supply pot as compared to a number of runners located on the second side which are connected to the mold supply pot.

Abstract: An apparatus for controlling the rate of flow of mold material to a mold cavity, including a valve system in fluid communication with an actuator to drive the actuator at one or more rates of travel, the valve system having a start position, one or more intermediate drive rate positions and a high drive rate position, the start position holding the valve pin in a gate closed position; a controller that instructs the valve system to move from the start position to the one or more intermediate drive rate positions and to remain in the one or more intermediate drive rate positions for one or more corresponding predetermined amounts of time and further drives the valve system to move from the one or more intermediate drive rate positions to the high drive rate position on expiration of the one or more predetermined amounts of time.

Abstract: A container closer includes a cap and a seal liner coupled to the cap. The cap is configured to mount on a filler neck of a container to mate the seal liner with a brim of the filler neck.

Abstract: A plunger for advancing a substance in a syringe toward a dispensing nozzle. The plunger has a plunger rod and a seal and being formed of a plastic composition. The plastic composition comprises a polymer and a filler which is non-uniformly distributed within the polymer to provide the plunger rod and the seal with different mechanical properties depending on the filler content in the portions of the plastic composition plunger forming the rod and the seal. The invention preferably provides a dental syringe which can be conveniently used, and further helps minimizing costs in the manufacturing of the dental syringe.

Abstract: A container has a base panel, at least one side panel extending upwardly from the base panel, and at least one end panel extending upwardly from the base panel. At least one corner is formed at a junction between the side panel and end panel. A flange extends laterally outward from the upper edges of at least one of the side panel, end panel, and corner. An injection-molded structure extends along at least a portion of the flange, the injection-molded structure includes a base portion adjacent the upper edges of the side wall and the end wall, a distal portion extending laterally outward from the base portion, and an indentation in the distal portion extending along at least a portion of the flange of the container. An apparatus for forming the container and a method of manufacturing are also disclosed.

Abstract: A gas extraction method including: providing an injection mold apparatus (100) including a mold cavity (300), a gas vent (490) and a gas vent pin (49), the mold cavity including an end portion of a material injection path (210), the gas vent communicating with the end portion, the gas vent pin being received in the gas vent; injecting molten material into the mold cavity and toward the end portion; venting gas from a gap between the gas vent pin and the gas vent as molten material is injected into the mold cavity; driving the gas vent pin to substantially close the end portion of the material injection path when the mold cavity having been injected with molten material to about 95 percent of a capacity of the mold cavity.

Abstract: An injection mold 70 includes a first portion 71, a second portion 72, a third portion 73, and a fourth portion 79. The first portion 71 has three high-density regions H in which there is the highest proportion of the axial direction dimension accounted for by the portion corresponding to cam grooves with respect to the axial direction dimension of a cavity 71a. First gates 74b are disposed at locations corresponding to the high-density regions H, or closer to the high-density regions H than second gates 75b. The average channel sectional area of first runners 74a is larger than the average channel sectional area of second runners 75a.

Abstract: An injection molded pump housing defines an interior chamber operable to contain pressurized fluid and to permit selective drainage of fluid from the chamber. The pump housing includes a unitary housing body presenting an outer margin, with the body including a drain-port boss. The boss defines a hole that extends axially therethrough and communicates with the chamber to thereby permit fluid drainage, with at least part of the boss being disposed along the outer margin of the body. The body includes a protrusion that extends outwardly from the boss to define a portion of the outer margin of the body and thereby prevent a weld-line from being formed on the boss, such that the boss is devoid of a weld-line. A method of injection molding an element so as to eliminate weld-lines in a hole-defining portion of the outer margin of the element is also disclosed.

Abstract: A mold 30 for use in producing a development blade 1, which is to be formed by adhering an elastic member to an elongated-shaped hard plate 2 along the longitudinal direction LD thereof, wherein the hard plate has notched portions on both side portions in the longitudinal direction thereof and the elastic member is molded to skip the notched portions, comprises: a cavity portion CA having a shape in accordance with the shape of the elastic member; and a gate portion 35 for injecting a material into the cavity portion CA, wherein the gate portion 35 is positioned, in the longitudinal direction LD, either on a border CL between each notched portion and the center portion side of a main body of the cavity portion or on the outer side of the border or within 10 mm on the inner side of the border.

Abstract: A composite of a metal and a resin, in which a shaped metal and a shaped thermoplastic resin are integrally joined by injection molding, and in which the perpendicular precision of the thermoplastic shaped body with respect to the shaped metal is improved, as well as a method for manufacturing the composite. A composite 40 of a metal and a resin is composed of a shaped metal 20 and a shaped thermoplastic resin that is integrally joined to this shaped metal 20 by injection molding. The shaped thermoplastic resin comprises a seat 42 and a boss 41 that protrudes from the seat 42. A runner 43 is provided which communicates with the seat 42 via two sprues and through which a molten thermoplastic resin that has been injected through an injection gate 45 flows into the boss 41 and the thermoplastic resin injected through the injection gate 45 flows through the sprues 47 to opposite locations of the boss 41 substantially uniformly, thereby filling the locations.

Abstract: The present invention relates to a method of manufacturing a laminate with the formation of underpressure between a mold (103) and a vacuum foil (105) and supply of resin from injection areas to the layers of the laminate situated in the mold. The novel aspect according to the invention comprises movement of the injection areas while the resin is supplied, This is accomplished by use of a movable suction unit (200) which is arranged on top of the vacuum foil and which, by means of an underpressure between the suction unit and the vacuum foil, forms injection areas for supply of the resin, which can be moved by moving the suction unit. The invention further relates to such movable suction unit and the use thereof in the manufacture of laminates.

Abstract: A molding apparatus is configured with article molding regions that receive a direct flow of a molding material feed such that external flow channels are not needed. The article molding regions are formed into front sides of opposed “A” and “B” surface mold tools that, when moved into a mating relationship with one another, form closed molding cavities within which molded articles are generated from molding material feed. The article molding regions each generally have a body bounded by a perimeter that establishes an outer edge for an article molded in the one of the closed molding cavities. With at least the “A” surface mold tool, a port is coupled with the body of each article molding region to establish a direct pathway is through which the molding material feed flows to enter the article molding regions, and thus the closed molding cavity, without having to flow along the tool front sides outside of the article molding regions.

Abstract: Apparatus for multiplying layers in a composite polymer stream includes an intermediate section having open conduits sandwiched between housing sections that close the conduits. The conduits have respective first stages separated by a first blade extending to a first face, and respective second stages separated by a second blade extending to a second face. The first stages separate the stream into sub-streams and compress and shift the sub-streams in a first dimension, whereas the second stages shift the sub-streams in a second dimension. In order to maintain a constant cross-sectional area of the sub-streams, the housing sections may be provided with complementary open channels. The apparatus can be used to multiply layers which are side-by-side or one-over-another by changing orientation in the direction of flow.

Abstract: An injection molding machine includes means for plasticizing rubber material and injectors for injecting the material in a fluid state into a flow channel having at least one outlet in communication with an internal volume of a mold. The flow channel is provided with at least one inverter device for inverting a radial temperature profile in the flow of the fluid material, between upstream and downstream ends of the at least one inverter device.

Abstract: A molding apparatus is configured with a distribution channel configured to deliver a blended feed composition directly into an article molding region such that a molded article is formed with gating on the bottom surface of the article. The article molding regions are formed into front sides of opposed “A” and “B” surface mold tools that, when moved into a mating relationship with one another, form closed molding cavities within which molded articles are generated from molding material feed. The article molding regions each generally have a body bounded by a perimeter that establishes an outer edge for an article molded in the one of the closed molding cavities. Additionally, the body of each article molding region of the “A” surface mold tool is adapted for molding a bottom surface for the composite article, and the body of the article molding region of the “B” surface mold tool is adapted for molding a top surface for the composite article.

Abstract: A compostable interior panel for use in a vehicle includes an injection molded compostable polymer. A layer is disposed about the compostable polymer and comprises a composting-resistant polymer having a thickness ranging from 10 ?m to 175 ?m. The compostable polymer and the composting-resistant polymer are substantially insoluble in one another when liquid.

Abstract: A method is provided for forming a feedstock material for use in net shape molded component that includes an integral metallized coating or layer on the exterior surface thereof. The feedstock includes a carefully matched mixture of polymer resin and a metallic alloy that is suitable for use in a molding method that includes melting and injecting the material into a mold cavity under pressure. Due to the differential in material viscosities, the metal tends to migrate to the outer surface of the molded part when placed under pressure, ultimately creating a net shape molded part having a polymer core with a metallic layer at the exterior surfaces thereof.

Abstract: A laboratory test tube is formed between male and female mold elements by injection of molten plastic material. The female element has a bottom element formed by first and second alternating complementarily shaped wedges. At least the second wedges are able to move under the pressure of the molten plastic from a rest position to an operative position in order to form slits which allow air, but not molten plastic, to exit from the mold.

Abstract: There is provided an injection die characterized in that the injection die is separated into at least two pieces, that a cavity for frame is formed between the separated dies, that the cavity for frame is provided with an additional cavity via a coupling hole, and that the coupling hole communicating with the additional cavity is provided at a confluence point of a resin in melted condition of the cavity for frame, at around a gate, at around a cavity for a fixing component, or at around a cavity for frame of which thickness is deep.

Abstract: When controlling each operational process in a molding cycle by variably controlling the number of revolutions of a drive motor 3 in a hydraulic pump 2, a hydraulic pump 2 where at least multiple fixed discharge flow rate Qo and Qs can be set is used as the hydraulic pump 2. At the same time, the fixed discharge flow rates Qo . . . are set corresponding to operational processes based upon predetermined conditions in advance, respectively, and the hydraulic pump 2 is switched to the fixed discharge flow rates Qo . . . by corresponding to each operational process at the time of molding. At the same time, each operational process is controlled by variably controlling the number of revolutions of the drive motor 3.

Abstract: A molded product includes an already-formed member and an injection molded portion. The already-formed member, which has a joining surface, is placed in an injection molding mold, and the joining surface and the injection molding mold define a molding cavity. The injection molding mold further defines a spill cavity that is in communication with the molding cavity. Liquid molding material is injected into the molding cavity. At least some of initial molding material which has initially reached the joining surface flows into the spill cavity due to injection pressure of subsequent molding material injected after injection of the initial molding material, and is replaced with the subsequent molding material, which has a temperature higher than that of the initial molding material and a viscosity lower than that of the initial molding material.

Abstract: A valve pin bushing assembly for an injection molding apparatus. The assembly includes a bushing body for connection to a manifold, a flexible barrier having a first end that is continuously connected to the bushing body, and a valve pin continuously connected to a second end of the flexible barrier. The valve pin extends through a nozzle in a downstream direction towards a mold gate, wherein the valve pin is movable in an upstream direction and in the downstream direction for opening and closing the mold gate. The flexible barrier seals a channel of molding material from an outside space.

Abstract: A manifold of an injection molding apparatus includes a primary melt channel and secondary melt channels extending from the primary melt channel. A shear rod is disposed at the junction between the primary and secondary melt channels. The shear rod extends from the junction into the primary melt channel and is disposed substantially parallel to the longitudinal axis of the primary melt channel.

Abstract: An object is to provide a resin molding method and a resin molding capable of improving strength while preventing generation of a weld line.

Abstract: Method for the injection-molding production of a magazine having a plurality of chambers, separated by partition walls, including an outer wall formed by an outer wall of the magazine. The method uses a casting mold having an outer wall channel corresponding to the outer wall of the magazine, and partition wall channels corresponding to the partition walls, and a gate opening. A plurality of partition wall channels extend from the gate opening to the outer wall channel. The method comprises injecting a plastic compound into the gate opening. The plastic compound flows from the gate point to the partition wall channels into the outer wall channel. The plastic compound streams have a differing flow speed in alternating partition wall channels so a joint line, which is aligned with a partition wall channel, forms on the outer side of the outer wall channel.

Abstract: A method of molding by injecting plastics material into a mold to make a part that is symmetrical about an axis of revolution, the part being hollow with a through passage along the axis, the part having two axial ends each defining an annular opening, the method comprising injecting the plastics material into the mold via an annular opening in an axial end of the part along an annular injection line, the plastics material containing solid particles of the flake or pearlescent type, thereby imparting flake and/or pearlescent highlights to the molded part.

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 an injection molded product. Thermoplastic is injected through a runner system and into a gate member. The gate member is generally V-shaped and thermoplastic is displaced through the gate into a mold cavity at a nearly perpendicular angle to the surface of the indicia carrier to hold the indicia carrier against the mold cavity. This allows the indicia carrier to be fused to the thermoplastic body during the making of a product.

Abstract: Disclosed is a fabrication method of products with closed channels by injection molding, which includes: a channel substrate mounting step of mounting a channel substrate comprising a plurality of opened micro-channels thereon to a mold; and a substrate cover molding step of molding a substrate cover by the injection molding on an upper surface of the channel substrate mounted to the mold, the substrate cover being coupled to the channel substrate while being molded. With this, the products with the closed channels can be fabricated without any additional coupling process between the channel substrate having the opened channels and the substrate cover, thereby simplifying a fabrication process and enhancing work efficiency.

Abstract: In the assembly-completed state, the Lower Mold, the Outer Mold, the Upper Mold, and the “inner mold (the integral body of the Pin-holder and the Pin)” are stacked and fixed in this order from the bottom, and the Pin is coaxially inserted into the First Hole of the Outer Mold and the Second Hole of the Upper Mold. In the assembly-completed state, the molding space for molding the ceramic molded body is formed between the surface of the Pin and the First Hole, and the annular minute gap is formed between the surface of the Pin and the Second Hole. The ceramic slurry poured into the Slurry Reservoir Pres formed on the upper surface of the Upper Mold falls and flows into the molding space through the annular minute gap by virtue of the action of gravity or the like.

Abstract: The object of the invention is a process for molding an optical element such as a lens (2). According to the invention, the element is obtained by a reaction injection molding process comprising the steps of mixing at least two polymerizing reactants and forcing the obtained reacting mixture by an injection duct (5) for filling under pressure a scaled mold cavity (4) having an entry side (43) provided with a casting opening (42) and an evacuation side (44) and providing a laminated flow of mixture in a spout (6) having a progressive enlarging transversal section between the outlet opening (52) of the injection duct (5) and the casting opening (42) of the mold cavity (4), for avoiding any turbulent area in said laminated flow, said evacuation side (44) being provided with means (45) for evacuating air contained in the mixture during mold filling. The invention also covers the molding installation adapted for using such a process.

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

Abstract: There is provided a method for manufacturing a substrate for a display panel including a rib and a flat surface (hereinafter referred to as “substrate surface”) formed on one surface, the substrate surface being the region other than the rib in the substrate and including an electrode provided thereon, the substrate having a convex/concave shape (hereinafter referred to as “a substrate convex/concave shape”) composed of the rib and the substrate surface, comprising: a step 1 for positioning a mold having a convex/concave shape (hereinafter referred to as “a mold convex/concave shape) that is reversed to the substrate convex/concave shape so that the mold convex/concave shape and the substrate convex/concave shape are fitted to each other, the mold being provided with a flat surface (hereinafter referred to as “a mold convex surface”) facing to the substrate surface at a convex portion of the mold convex/concave shape, and with a surface (hereinafter referred to as “a mold concave bottom surface”) facing to a

Abstract: An improved truck bed toolbox lid and a method of producing the same. The truck bed toolbox lid includes an outer metallic sheet layer comprising a generally rectangular top sheet member, a longitudinal front edge member, two lateral edge members and a longitudinal rear edge member. A metallic liner sheet member is disposed inside the top sheet member in edge contact abutment with beveled inside edges of the front and rear longitudinal edge members and the lateral edge members to create an internal cavity in which the liner is by stitch welding. One or more injection ports are provided through the liner sheet member through which a self-expanding and self-curing, relatively high-density, foam is injected. The stitch welded edge contacts leave non-welded, gas permeable junctions along the wedged cavity periphery at a funneled apex of the edge contacted boundary which facilitate expansion of the foam toward the outermost edges of the cavity.