Abstract: This invention relates generally to an apparatus for casting a portion of a tire or other article of manufacture, and, more specifically, to an apparatus that has a gate design that has a circular runner and concentric channel or waste reservoir for separating off-ratio material before it enters the cavity that forms a portion of the fire or oilier article of manufacture. The design may further include a passage that connects the runner to the waste reservoir as well as an air vent that allows trapped gas or air to exit the waste reservoir as it fills with waste material, a valve that Is operative!)? associated with the passage for closing and opening the passage at appropriate times, and a nozzle for initially introducing material into the waste reservoir and subsequently into runner.

Abstract: A baffle or reinforcer includes a carrier configured to be disposed in a cavity and a fixation mechanism disposed on the carrier and configured to at least partially support the carrier in the cavity. The fixation mechanism defines an opening for receiving an expandable material. The fixation mechanism has an anti-return device configured to prevent at least a portion of the expandable material from escaping through the opening during expansion. A method includes inserting the carrier into the cavity, injecting the expandable material into the cavity via the opening in the fixation mechanism, expanding the expandable material within the cavity, and preventing at least a portion of the expandable material from escaping through the opening during expansion.

Abstract: A feeding mold including a runner and a gate structure is provided. The runner is adapted to be filled with a liquid-like material. The gate structure includes a storage cavity, a running passage and a filling cavity. The storage cavity communicates with the runner and is adapted to store the liquid-like material filled by the runner. The running passage communicates with the storage cavity. The running passage is adapted to carry the liquid-like material from the storage cavity so as to evenly distribute the liquid-like material. The running passage has a protruding buffering cavity which is located between the storage cavity and the filling cavity and is adapted to change the velocity of the liquid-like material in the running passage, and lower the temperature of the liquid-like material flowed onto a surface of a workpiece.

Abstract: The present disclosure relate to the field of depositing an underfill material between a microelectronic die and a substrate for flip-chip packages. In at least one embodiment, differential pressure is used to meter the underfill material during the underfill deposition process.

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: A composite insulator-producing lateral type molding apparatus includes a mold body constituted by a first molding unit and a second molding unit, each of said first and second molding units being provided, at an inner peripheral face, with recesses for the formation of a housing constituted by a plurality of shed portions and a axial portion connecting these shed portions, means for opening or tightening the first molding unit and the second molding unit, a pouring passage for pouring a housing-forming material into said recesses, and housing-forming material escape holes. A core member of the insulator is placed between the first and second molding units, the first and second molds are tightened, and the housing-forming material is poured into said recesses to form the housing. The first molding unit and the second molding unit extend laterally, and that the core member is laterally arranged horizontally between first and second molding units.

Abstract: A mold for injection molding including a cylindrical outer mold and a columnar inner mold. The inner mold is provided, on its external circumferential surface, with a large number of tooth-shaped grooves extending in the axial direction thereof, and it is placed inside the outer mold to define an annular cavity between the external circumferential surface of the inner mold and the internal circumferential surface of the outer mold. The outer mold is provided with a plurality of runners extending axially near the internal circumferential surface. The runners are arranged at regular annular intervals along the circumference of the outer mold. Furthermore, slit-shaped gates are formed along the full length of the runners, the gates opening into the internal circumferential surface of the outer mold, in such a way that the inflow of molten molding material flowing from each runner into the cavity is gradually reduced along the runner from the upstream side towards the downstream end.

Abstract: An apparatus is disclosed for the reduction of mold cycle time. A heat recoverable member in a compressed state is placed within a channel defined relative to the surface of a mold. A hardenable liquid used to form the article then flows in an accelerated manner through the channel. Thermal energy supplied to the heat recoverable material thereafter causes the heat recoverable material to expand within the channel, thereby displacing the hardenable liquid from the channel. The temperature of gelation of the hardenable liquid and the recovery temperature of the heat recoverable material may be selected such that the channels are substantially filled by the heat recoverable material prior to the hardening of the hardenable liquid. In this manner, the heat recoverable material becomes flush with the surface of the mold prior to hardening of the liquid so as to yield an article of manufacture having a relatively planar surface.

Abstract: Apparatus and method for injecting molten plastics material into a midsole cavity by the provision of channels entirely within at least one-half of a split side mold defining sides of the cavity. This arrangement eliminates the problems associated with injecting the molten plastics along a channel formed in the parting line between the side mold halves and particularly overcomes the problem of injecting molten plastics material incorporating a blowing agent to provide closed cells in the midsole.

Abstract: Injection molding a tread on an annular tire casing (44) positioned in a mold (10') by introducing a fluid molding compound (76',78') at high pressures and high temperatures into a tread molding space (105) through runner passages (114) extending from an edge (116) to a centerplane (20'--20') of the mold (10') and having gates (118) opening into the tread molding space (105). Alternatively the runner passages (56,58) may be defined by annular runner surfaces (60,62,64,66) in communication with the tread molding space (48) through annular gates (52,54). The fluid molding compound (76,78) may be ejected from annular transfer recesses (68,70) in the mold (10) by squeeze rings (84,86) movable into the transfer recesses (68,70) to introduce the fluid molding compound (76,78) into the runner passages (56,58).

Abstract: Injection molding a tread on an annular tire casing (44) positioned in a mold (10') by introducing a fluid molding compound (76',78') at high pressures and high temperatures into a tread molding space (105) through runner passages (114) extending from an edge (116) to a centerplane (20'--20') of the mold (10') and having gates (118) opening into the tread molding space (105). Alternatively the runner passages (56,58) may be defined by annular runner surfaces (60,62,64,66) in communication with the tread molding space (48) through annular gates (52,54). The fluid molding compound (76,78) may be ejected from annular transfer recesses (68,70) in the mold (10) by squeeze rings (84,86) movable into the transfer recesses (68,70) to introduce the fluid molding compound (76,78) into the runner passages (56,58).

Abstract: A process and apparatus for the internal gating of molds used to make a shaped article of aggregate filler infiltrated with a curable binder, including preparing a mold having a cavity and having gating tubes extending through the mold cavity and spaced from its surfaces, and the gating tubes having walls with multiple openings therethrough which are located inside the mold cavity, the cavity being dry-packed outside of the tubes with aggregate filler and the interstitial spaces therebetween being pumped full of liquid binder to form a matrix, the binder entering through the tubes and their openings and progressively expanding through the interstices while expelling air from breather holes, the binder then being cured in the mold either with the tubes still in place or with the tubes removed and the spaces filled with similar aggregate and binder before curing is completed.

Abstract: The invention contemplates a sprue-gate configuration embodied in one of the cavity-defining parts of a multiple-part mold for injection molding of plastic articles. At the gate region of sprue discharge into the cavity, the sprue converges into communication with a cluster of restricted-gate orifices which are in closely spaced, angularly distributed relation about the generally central axis of the sprue. The combined area of the restricted-gate orifices may be less than the area of a conventional single-orifice gate serving a cavity of the same size.

Abstract: In the moulding of plastics material using a female mould cavity into which a number of cores are inserted, in order to prevent deflection of the cores under the action of the injected plastics material, complementarily shaped formations are provided on the free ends of the cores and the mould wall, the formations being so disposed and arranged as to produce restoring forces tending to reduce deflection of the cores and to prevent transmission of deflection between adjacent cores. Various examples of suitable formations are disclosed. The invention is illustrated with reference to its application to the manufacture of battery boxes.

Abstract: A method for introducing reactants into molds and articles produced. The method involves placing a body member into a receptacle located on a turntable; aligning the body member within the receptacle; positioning a foaming spacer on the body member around an aperture in the body member; lowering a liner on a plug fixture into the body member so that the foaming spacer abuts both the body and the spaced apart liner; inserting a foam machine head into the aperture in the body; injecting suitable reactants through the head, through the spacer, into the chamber formed between the liner and the body; maintaining the contact between the head and the body for a few seconds to allow the reactants to activate and set; removing the head from the aperture of the body; and further rotating the turntable to allow the reactants time to cure. The apparatus for facilitating the introduction of reactants is the foaming spacer of the above method.

Abstract: An apparatus is provided for injection molding a pneumatic tire having corresponding symmetrical parts such as the sidewalls of the tire which are geometrically symmetrical and have substantially the same physical characteristics. The apparatus involves means for providing a feed stream of suitable plastic or elastomeric compound such as rubber, separating the feed stream into intermediate streams and remixing the intermediate stream before injection into the mold. The compound is injected into the mold cavities at uniformly spaced points along at least one of the annular zones of the cavity. The feed stream is preferably separated into two streams, one of which comes primarily from the outer portion of the stream and the other predominantly from near the center of the stream and then these streams are intermixed to provide a stream which is substantially uniform in composition throughout.

Abstract: The invention is an improvement in apparatus for growing crystalline bodies from the melt. The apparatus comprises a crucible and a novel die assembly in which the die assembly is made in two parts and essentially comprises inner and outer concentric members. The inner and outer members are spaced from one another to define an annular lower capillary section. One member is longer than the other and is shaped so that its upper end overhangs and engages the upper end of the other member. A plurality of upstanding dies are formed in the upper end of the longer member. Each of the dies has a top end surface and is slotted in a generally radial direction with the slots being deep enough to intersect the annular space between the two members. The slots in the dies serve as capillaries to provide communication between the lower capillary section and the top end surfaces of the dies.

Abstract: A transfer structure for a stacked injection molding die comprising:Two transfer tubes connected to a stack molding die and connected together by a knuckle joint so that molten plastic can flow from the runner in one of the parts of the stack molding die through the transfer tubes to the other dies, yet allow the die members to move freely toward and away from each other.

Abstract: A mold including a blind channel connected to the sprue runner so that the first material entering the mold will be trapped in the blind channel.

Abstract: A battery container made of molded plastic and preferably formed in a single unitary structure. The container comprises a generally rectangular hollow container with a closed bottom and an open top. A plurality of internal partitions formed as integral parts of the container bottom and side walls divide the interior space into a plurality of battery cells. These partitions are formed by a plurality of spaced mold cores disposed within the mold that forms the outside shell of the container. A plurality of ribs are formed on the mold surface that forms the bottom of the container, the ribs being in alignment with the cavities between adjacent mold cores and forming a plurality of parllel grooves in the lower surface of the container bottom.

Abstract: Apparatus is disclosed for injection molding a partitioned container having four sidewalls, an open top and a closed bottom. Thermoplastic material from a primary sprue flows through a runner system to inlet gates disposed to open into the mold cavity in a generally common plane lying at about the open top of the container to be molded and along opposed container sidewalls intermediate adjacent partition walls. Two mold structures are disclosed. A preferred mold comprises four block members defining, in a closed position, a hollow cavity corresponding to the exterior container dimensions but movable outwardly to an open position. A plurality of spaced core members are movable into and out of the hollow cavity to, respectively, define the container mold and permit ejection of the molded container therefrom. Other apparatus features are disclosed.

Abstract: A balanced runner system for injection moulding apparatus is disclosed. The runner system has an inlet, a plurality of runners and five gates. One of the gates is centrally located, the remaining gates being symmetrically spaced about the centrally located gate. The runners are such that the runner system is capable of supplying molten polymer to each gate at substantially the same rate. The runner system may be used to obtain a more uniform flow of molten polymer to a mould.