Abstract: Under the condition that the stationary metallic mold and the movable metallic mold are closed, the housing is molded into a shape having the retainer insertion hole by the existence of the sliding mold. At same time, a retainer is also molded in the below portion. First, when only the rear metallic mold is opened, the core pin is withdrawn, and at the same time the sliding mold is withdrawn along the advancing and withdrawing passage in the longitudinal direction by the cam action of the angular pin, so that the molding portion is withdrawn from the retainer insertion hole. Successively, when the metallic mold is opened, the sliding mold is relatively drawn out to the front of the advancing and withdrawing passage together with the stationary metallic mold, and the advancing and withdrawing passage becomes open. Next, the auxiliary sliding mold is advanced, and the retainer held by the auxiliary sliding mold is inserted into the retainer insertion hole and temporarily assembled to the housing.

Abstract: A molding apparatus for molding an edge card connector and an edge card connector, wherein the molding apparatus is composed of a male and female molding die. The male molding die has a middle protrusion and a plurality of first holding portions, and said female molding die has a plurality of core pins. When the integral molding apparatus is assembled to mold an edge card connector, each core pin is received securely in a corresponding first holding portion, for retaining each core pin in a straight manner without inclination via injection molding process, so that the formed edge card connector of which each passageway defines a through bore extending into and connected with central slot of housing.

Abstract: A movable insert for a die-casting mold having a cavity in which a core is mounted and slidable between a retracted position in the cavity and an extended position in which the core extends from the movable insert core. The core has a connector releasably connecting the core to a locator. The locator moves the core between the retracted and extended positions.

Abstract: A guide block assembly is provided for retaining a plurality of fiber bore forming pins and at least one guide bore forming pin in precise relation to each other during molding of a multi-fiber ferrule used in a multi-fiber connector. The assembly includes an array of fiber bore blocks each with a fiber bore therethrough to retain a respective one of the fiber bore forming pins. At least one guide bore block that defines a guide bore for retaining a guide bore forming pin is assembled with the array of fiber bore blocks. Adjoining surfaces are defined between adjacent fiber bore blocks and between the guide bore blocks and the array fiber bore blocks. The use of bores more precisely retains the pins during the molding process, and the use of blocks with adjoining surfaces allows for the machining of such surfaces to precisely establish the relationships between successive fiber bore blocks and between the array of fiber bore blocks and the guide bore blocks.

Abstract: In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, and the TM dual mode dielectric resonator includes first and second dielectric resonators integrally formed so as to be perpendicular to each other, and there is further formed at least one coupling groove for coupling an operation mode of the first dielectric resonator with that mode of the second dielectric resonator, wherein the coupling groove is formed on at least one of front and back surfaces of a crossing portion of the first and second dielectric resonators, in a diagonal direction thereof so as to cut electric lines of force of either one of an odd mode and an even mode. Alternatively, at least one coupling projection may be formed instead of the coupling groove.

Abstract: A molding die assembly includes an outer molding die which forms an outer peripheral surface of a cylindrical mold, and, an inner molding die which forms an inner peripheral surface of the cylindrical mold, wherein the outer molding die is comprised of a plurality of split die elements which are split at an oblique separating surface inclined with respect to the circumferential and axial directions of the cylindrical mold.

Abstract: An assembly for manufacturing a plastic piston using a first mold and a second mold, each mold having an axial recess, centering element, core element and contact face. The second mold is movable toward and away from the first mold and can be connected to the first mold using a transverse slide on the first mold and a holding apparatus.

Abstract: A hole form apparatus for use in forming and/or maintaining a hole or cavity in environments which would otherwise tend to close the hole, functions for example in maintaining holes cut in ice, or for making holes or cavities in other solidifying liquids or mixtures, such as concrete, or in compactable materials such as soil. The form has a tubular body that is hollow and tapered so that it is narrower at the bottom, which is closed, than at the top. Disposed within the body is a weight connected to a shaft which extends axially through the top surface of the tube to a handle attached at its end. The form is removable from a formed hole by pulling forcefully on the handle, causing the weight to strike the inside top surface of the tube in one embodiment, or a removable strike plate in a second embodiment. This impact and the shock it causes, working together with the tapered shape of the tube and its smooth surface enable the tube to be broken free from the walls of the formed hole.

Abstract: A molding device for a register of synthetic resin adapted for use in adjustment of air flow, wherein a pair of outer frame members, a plurality of spaced adjustment blades and a link member of the register are separately formed and assembled during a molding process without. manual work required heretofore for connecting the link member with the adjustment blades for interconnection thereof.

Abstract: A core lifter system is provided for a plastic injection mold, particularly for use in a mold in which an undercut is to be formed in the molded part. The system has a core blade and a support for the core blade, with the support being formed to be mounted for linear translation on an ejector plate. The system is configured for fixedly retaining the core blade on the blade support at a desired angle of inclination of the blade relative to the support. In one form of the invention, the blade is adjustable, and pinned in place. In another form of the invention, a separate, inclined blade support is provided for each different angle of inclination desired for the blade, and the blade and the support are pinned together.

Abstract: Apparatus for the preparation of optical ferrules containing cylindrical members is disclosed. The apparatus utilizes guide means receiving the cylindrical member, a sleeve receiving a piston therethrough, and a pin extending into the sleeve. The apparatus also includes biasing means to position the piston, fill gates to dispense polymer into a defined cavity, and containment means which secure the apparatus components together. Injection molded optical fiber ferrules made according to the apparatus and process disclosed exhibit superior properties.

Abstract: A wax pattern molding process, employing a mold having a cavity and a core structure in the mold cavity that include closing the mold with the core structure positioned in the mold cavity; injecting flowing heated wax into the mold to flow about the core; allowing the injected wax to cool and solidify to form the wax pattern; removing the core structure from the solidified wax pattern, while the mold holds the pattern in position in the mold; and opening the mold and removing the unencumbered wax pattern from the mold.

Abstract: A molding apparatus for injection-molding a hemispherical hollow body formed of a thermoplastic elastomer and having a valve formed integrally therewith. The apparatus includes a first mold having a hemispherical convex molding surface, a second mold having a hemispherical concave molding surface larger in size than the convex molding surface. The second mold is superposed on the first mold to form a molding cavity for the hollow body. A first valve mold is removably mounted at the center of the hemispherical convex molding surface of the first mold, for forming the valve and an inside and small-diameter portion of a valve rubber insertion hole of the valve. A second valve mold is removably mounted at the center of the hemispherical concave molding surface, for forming an intermediate and large-diameter portion of the valve rubber insertion hole and an outside and small-diameter portion thereof while forming a cavity for the valve in cooperation with the first valve mold.

Abstract: An assembly for making a wax pattern of a hollow component includes a pattern die and a noncircular core which is located within the pattern die. The pattern die is a split die and includes two halves which have shaped internal surfaces to define the external shape of the wax pattern of the hollow component. The core has shaped external surfaces which define the internal shape of the wax pattern of the hollow component. The core has coaxial circular cross-section projections which locate within correspondingly shaped and dimensioned apertures in the pattern die. One of the apertures in the pattern die has a radially extending pin which is arranged to mate in a groove on the projection to locate the core longitudinally. The core is allowed to rotate within the die so that chaplets on the core position the core accurately without imposing strains on the core.

Abstract: A mold for making a seal for garment labels, the seal including a base body (11) and graft type elements (12) connected to the ends of a cord or thread (10) and insertable into the base body for connecting thereto. The graft type elements (12) engage in a seat (13) through opposite openings in the base body (11) and have resilient fingers (15) which hook into undercuts (14) in the seat (13) to prevent removal. The seat (13) extends longitudinally within the base body (11) and opens at the ends into openings in opposite side walls of the base body each opening defining with the seat an undercut (14) facing the opposite opening.

Abstract: In the case of certain series-produced finished parts, such as switch cross ties, the precision of the assembly of components is of decisive importance. The components should neither be damaged nor should their position be changed during assembly. During the assembly process, they have to be nonslidably fastened in the casing, at the same time the fastening should not damage the finished part or the component during the movements occurring in the hardening process or during the removal of the casing from the finished part. The temporary connection uses a blind rivet which can be introduced and driven in from above with its stem through the bore of the bottom plate carrying the component, as well as through the bore determining the position of the component in the casing plate, and is solidly anchored on the outside of the casing plate by rivet-head-like enlargement.

Abstract: A method for temperature conditioning a blank of plastic material in which a conditioning mandrel is placed within the blank and thereafter expanded into reliable abutment against the inner surface of the blank. The mandrel is thereafter returned to its initial position. The outer surface of the mandrel is adjusted to and maintained at a certain temperature, whereby, during the abutment, an energy exchange takes place between the blank and the mandrel for adjusting the temperature of the blank. At high temperatures of the mandrel, the mandrel is displaced out of the blank after such short time that the plastic material in the region of the abutment surface never passes the critical temperature of tackiness of the plastic material and/or thermal crystallization of the plastic material. As a rule, the expansion and contraction of the mandrel is repeated one or more times.

Abstract: A injection-molded connector for single-mode optical fibers includes two mating plugs having aligned fiber-receiving holes. To keep transmission losses in the connector at an acceptable level, the eccentricity of each hole relative to its plug profile must be maintained within a fraction of a micron. The mold utilized to form the plugs includes a dual-eccentric-cam adjustment mechanism that comprises nested conically shaped cams. In a method for fabricating such plugs, rotation of the cams serves to move a part of the mold that positions a hole-forming pin. By rotating this mechanism, the eccentricity of the fiber hole relative to the profile of the molded plug can be established and maintained within the required precision.

Abstract: A mold for skin covered foamed plastic molding which utilizes a middle mold to be placed between an upper mold and a lower mold, capable of reducing the weight of the middle mold so that assembling of the middle mold becomes less troublesome, the assemblage becomes more stable and the appearance of undesirable spacing in the assemblage an be prevented. The mold includes an upper mold to be closed over the lower mold, having a bent portion with a bottom surface which is to be a part of molding surface; and a middle mold to be placed between the upper mold and the lower mold, having a hollow region into which the bent portion of the upper mold is to be engaged when assembled.

Abstract: A forming tool, used in the production of an anode before the firing, for forming peg holes with angularly grooved sidewalls, having a cap plate to which at least one retaining pivot, with one end attached and having a stop, which is fixed to the cap plate and limits the rotation of the forming body in one direction and an elastic means which on the one side is connected so as to be fixed to the cap plate and don the other side is connected to the forming body to preload the latter against the stop and ensure that its projections always form the grooves in the wall of the peg hole in the same angular position relative to the finished anode. As a result cleaning of the peg hole by an automatic cleaning machine is made possible.

Abstract: A device for inserting and withdrawing a core in plastic and die cast molds. A rotatable cylindrical nut is located within the hollow cylindrical interior of a support housing. The nut has a threaded inner cavity. A non-rotatable slide extends through an aperture in the housing, the slide having a threaded end engaging the threaded inner cavity. When the nut is rotated, the slide is either extended or retracted through the aperture depending on the direction of rotation of the nut. A mold core is affixed to the slide for insertion into and withdrawal of the core from the mold.

Abstract: A guide pin assembly is described which unidirectional orients mold platens while permitting temperature compensating movement in a perpendicular direction. This is accomplished by using a guide pin and shoe that contact in one direction and permit movement in a perpendicular direction. A bushing containing preloaded bearings is disposed about the guide pin such that the bearings make contact with the shoe to reduce wear and permit the guide pin to slideably contact the shoe.

Abstract: A precision injection-molded form for an inductance coil comprises a cylindrical core member having a surface of relatively low dimensional precision, and a thin plastic layer molded over the surface to provide a surface of high dimensional precision for supporting the windings of the coil. Metal insert-members having threaded axial bores and radially-extending wing portions are provided at either end of the core to establish electrical contact with the winding and a mounting capability for the assembly. The coil form is formed by injection molding techniques and apparatus which provide for axial compression of the assembly prior to molding to obtain a predetermined longitudinal dimension, and for equalization of forces exerted during molding to prevent longitudinal deformation.

Abstract: An apparatus and method of molding a biconical socket (FIG. 1) of precise concentricity and length. The biconical socket is formed by a two piece mandrel assembly (20, 21), each mandrel member having a frustoconical end (22, 23). The frustoconical ends of the mandrel members are abutted and aligned by means of a coaxially extending pin (24) in one member which engages a hole (25) in the second member. The pin is fabricated from a dissimilar material so that at the elevated molding temperature the clearance between pin and hole is substantially reduced, thereby providing precise concentricity. During molding the pressure of the mold material forces the mandrel members slightly apart against predetermined stops (32, 33) to provide a socket of precise length (L). The resulting biconical socket is particularly well-suited for use in an optical connector assembly.