Abstract: A nozzle controls flow of melt in injection molding equipment by passive actuation with opening and closing of a mold assembly. The nozzle comprises a valve pin having a pin passage therethrough movably supported within a nozzle passage and a contact arm transverse to and extending beyond the nozzle passage, the valve pin sealingly engaging the nozzle passage. Biasing means biases the valve pin to a closed position preventing passage of melt through the nozzle. The contact arm effects movement of the valve pin to an open position when closing of the mold assembly exerts a force on the contact arm to overcome the biasing means. A mold arrangement of plural mold assemblies comprises pairs of nozzles of the invention to control flow of melt through mating conduit segments between an injection unit and at least one mold assembly, the nozzles arranged and configured for seating engagement with abutment of the conduit segments.

Abstract: A nozzle for controlling flow of melt in a mold assembly comprises a valve pin guide interposed between a nozzle inlet and nozzle outlet, a valve pin movably supported thereby, and a contact arm engaging the valve pin and transverse to and passing through the valve pin guide. Biasing means acting on the contact arm hold the valve pin in a position preventing flow of melt. As the mold assembly closes, forces exerted on the contact arm overcome the biasing means and allow the valve pin to move to a position permitting flow of melt. Relief of pressure of retained melt is effected when force therefrom exerted on the valve pin exceeds an adjustable pre-load of the biasing means. The nozzle advantageously comprises an inlet bushing movably supported by the nozzle body enabling adjustment of the overall length of the nozzle to accommodate a range of spacing of elements of the mold assembly.

Abstract: A pressure indicating fitting for injection molding equipment comprises a fitting body with a fitting bore therethrough, the fitting body being installed in the equipment with the fitting bore open to the interior of a passage for conveying melt, an indicating member received within the fitting bore and being bonded thereto to be retained in a normal position and being displaced therefrom to an indicating position by force from melt applied to the indicating member sufficient to cause the bond to fail, the indicating position determined by abutting contact of a surface of the indicating member with a surface of the fitting body and exposing a portion of a stem of the indicating member. Advantageously, the indicating member is retained in an indicating position by a press fit between the indicating member and fitting body. An injection molding manifold comprises a pressure indicating fitting in accordance with the invention.

Abstract: An apparatus and method for blow molding an article having a concave base wherein a mold has a base component comprising a molding surface for forming at least a portion of the concave base and a path for conduction of heat transfer fluid through channels within the base component. Improved heat transfer is effected in the base component by locating the channels at a plurality of distinct depths therein.

Abstract: A mold assembly wherein a cavity for molding is defined by primary mold cavity and primary mold core elements and a supplemental core element, the primary mold cavity and primary mold core elements are carried by first and second mating mold components and the supplemental core element is carried by a slide moveable transversely relative to the direction of motion of the mating mold components. The slide is supported by the first mating mold component and has an opening therein for engaging an actuating pin supported by the second mating mold component at an angle oblique to the parting line face of the second mating mold component. The actuating pin is removably retained in a support opening in the parting line face of the second mating mold component by means accessible from the second mating mold component parting line face.

Abstract: A cold or hot-forging heading die used in metalworking to form a “head” on the end of a metal rod is configured to provide two heading cavities formed in opposite ends of the carbide insert. The heading die of the invention comprises a hardened steel ring with a cylindrical carbide insert having a through bore with a first cavity machined concentrically with the bore in one end of the carbide insert. The die is then inverted and a second cavity formed in the opposite end of the insert. The second cavity can be identical to the first cavity or provide the shape for an alternate head configuration.

Abstract: A method and apparatus are disclosed for controlling temperature of a plant comprising plural temperature control zones, wherein an effective control parameter for a first zone for which a signal representing measured temperature is available is produced according to an algorithm relating measured temperature, a desired temperature and a control parameter associated with a device affecting temperature in the first temperature control zone, the effective control parameter is summed with an offset value representing a proportional offset of the effective control parameter of a second temperature control zone relative to the effective control parameter of the first temperature control zone and the result is applied to control a device affecting temperature in the second temperature control zone.

Abstract: A computer system comprising a personal computer assembly (motherboard), memory for storing data, means for detecting loss of applied power, and means responsive to the detecting means for inhibiting data transfers by the processor of the personal computer and the memory. In accordance with the invention, memory comprises non-volatile memory and the inhibiting means applies a signal to the memory to inhibit data transfer operations of the memory. The means for detecting loss of applied power detects loss at a power mains connection of a power supply for supplying operating power to the personal computer assembly. A machine control comprises a computer system according to the invention.

Abstract: A mold positioning system (10) for use in guiding and aligning mold segments (11, 13) includes a male member (12) having a tongue portion (14) on one mold segment that engages a female member (20) attached to the other mold segment when the mold assembly (8) is closed. The female and/or male member (20, 12) are configured to receive a replaceable insert (36) in the areas of the mold positioning system (10) that are subject to wear. The replaceable insert (36)is easily removable for replacement to increase the life of the male and female members (12, 20).

Abstract: A flow nozzle (10) that conveys plastic melt from an injection unit of a molding machine to a mold cavity (72) has an improved, removable seal design. The nozzle body (12) is designed to threadedly receive a nozzle tip (24) that includes an outlet (30) that communicates with the mold cavity. A thin-wall, cylindrical seal ring (40) includes a compression portion that is received between the nozzle body and nozzle tip and is compressed to create a seal between these two elements when the tip is assembled to the nozzle body. The seal ring further includes a sealing portion (50) that encircles the nozzle tip and has an outer diameter slightly larger than the outer diameter of the nozzle body.

Abstract: A molded part ejection tystem (103) includes a drive mechanism having a reversible servomotor (240). The drive mechanism for the ejection system includes a cam-and-follower arrangement whereby a circular cam member (252) is driven by the servomotor (240) through a drive shaft (250) that is connected with the cam member (252) and is offset from the center of the circular cam track (254). A cam follower (260) connected with an ejector drive rod (238), and the cam follower (260) rides in the cam track (254) to cause linear movement of the ejector drive rod (238) as the cam follower (260) follows the circular cam through its non-circular path of motion. Rotation of the servomotor (240) in one direction of rotation operates the part ejection system, while rotation of the servomotor in the opposite direction of rotation provides power to another portion of the machine during another portion of a molding machine operating cycle, such as a core-pull system.

Abstract: In an electrical apparatus wherein electrical devices are interconnected by coupling connectors and a desired interconnection of devices is achieved by an intended interconnection of mating components of coupling connectors, identification elements in one mating component of each connector produce identification signals representing identity of the mating component. Decoding means responsive to the identification signals produce an error signal representing an interconnection of connector components differing from the intended interconnection and, means responsive to the error signal effects a response when the actual interconnection of components differs from the intended interconnection of components. Responses are, advantageously, activation of an error indicator, inhibition of application of power to affected devices, or, with program controlled systems, display of a text error message, facilitation of user intervention for error correction, or automated re-programming to overcome interconnection errors.

Abstract: A latching device (20) for a mold assembly (10) uses a cam action to hold the “A” side plate against the hot runner system/nozzle plate (18) during operation. Preferably, a latch (20) is provided on each side of the mold to effectively hold the “A” side plate against the nozzle plate (18) during the high pressure injection of plastic melt. For purposes of a mold insert change, each latch (20) is rotated to release the “A” side plate from the nozzle plate (18), and hold the “A” side plate against the “B” side plate. This enables the “A” (12) and “B” (14) portions of the mold assembly to be moved away from the nozzle plate (18), thereby avoiding interference of the hot runner nozzles and “A” side insert and enabling quick mold insert change.

Abstract: A pressurized-fluid-operated actuator has multiple piston surfaces for providing increased output force. The actuator includes a stationary cylinder that contains a movable cylinder having multiple inner chambers separated by stationary inner pistons. The inner chambers are in fluid communication with extension and retraction ports provided in the stationary cylinder wall. Introduction of pressurized fluid into one port causes the fluid pressure to act on “n” piston surface(s) to retract the movable cylinder. Introduction of pressurized fluid into the other port causes the fluid pressure to act on “n+1” piston surfaces to provide an increased output force without increasing the diameters of the cylinders and without increasing the pressure of the fluid.

Abstract: An assembly for electrical distribution includes not less than six conductors, the assembly defining a distribution portion and a source application portion, load connecting portions of the conductors being arranged in overlying layers in the distribution portion of the assembly. The load connecting portion of each conductor includes at least one load connection portion projecting beyond the overlying layers of the assembly whereby each load is connected between two conductors at the distribution portion of the assembly. The source connection portion of each conductor having at least one connection element, the source connection portion of each conductor being electrically isolated from the source connection portions of all other conductors.

Abstract: A program controlled machine wherein signals produced in response to execution of programs control operation of machine devices includes a control for storage, retrieval and presentation of audio/video information. The control includes devices for presentation of audio/video information and stored programs including programs for enabling storage of audio/video information files while the machine is in a manual mode of operation and programs for controlling the presentation by the audio/video presentation devices of selected audio/video information from the stored files. The control provides facilities for recording audio/video information and for manually controlled presentation of audio/video information as well as for automatic presentation of audio/video information in response to detection of occurrence of a particular event.

Abstract: Method and apparatus for control of an ejector mechanism of a molding machine. A procedure is executed without operator intervention for setting limits for controlling motion of movable members of mold assemblies, the movable members linked to ejector pins communicating with the mold cavity and used to assure molded articles are dislodged from a mold element. The procedure, typically associated with a “set-up” mode of control, operates an ejector mechanism with reduced force to drive the movable members to the extremes of travel thereof, senses a “stalled” condition at each extreme, and causes measured position of each extreme to be recorded. Position values intended for use in normal (program controlled) operation of the molding machine are derived from the recorded position values.

Abstract: A vitreous bonded abrasive article, more particularly a grinding wheel, having improved grinding performance is provided wherein the open pores of the abrasive article contain an impregnant which comprises at least one water insoluble, sulfur bearing organic substance having at least one carbon to sulfur bond, at least about 5% by weight sulfur and a melting point of at least about 30° C. said melting point being at least 10° C. below the decomposition temperature of the substance and selected from the group consisting of substituted and unsubstituted aliphatic, aromatic, cycloaliphatic, alkenyl, alkynyl, alkylaryl, arylalkyl and substituted heterocyclic sulfur bearing organic substances or a mixture of said substances grinding aid. The impregnant is free of a medium, other than the water insoluble, sulfur bearing substance, in which the substance or a mixture of such substances is dissolved or dispersed.

Abstract: An improved end milling tool effective to reduce forces produced in ramp cutting comprises a plurality of end cutting edges, and a plurality of side cutting edges, each end cutting edge lying parallel to a radius of the tool tip and intersecting a side cutting edge at the periphery of the tool tip, and each end cutting edge comprising a peripheral end edge portion and an interior edge portion, the peripheral end edge portion sloping relatively shallowly from the tip periphery towards the shank portion of the tool, and the interior edge portion sloping relatively steeply from the peripheral edge portion towards the shank portion.

Abstract: Method and apparatus for control of a toggle operated press to effectively set relative position between a fixed platen and a die height platen. The toggle crosshead is placed at a position required to achieve a desired press clamp force. The die height platen is advanced toward the fixed platen until minute motion of the toggle crosshead away from the fixed platen is detected whereat advance of the die height platen is ceased. In the relative position of the die height platen and fixed platen results in contact of the mold sections prior to the crosshead being placed at the required position, the crosshead is retracted a predetermined distance and then advanced to the required position. Desired die height setting is achieved without repeated iterations of a die height setting procedure.