Abstract: An improved shielding assembly for an overmolded electrical connector is formed by a pair of mating metal shell members which engage a peripheral metal housing of a standard connector and enclose the rear conductor exiting portion thereof. The shell members each include embossed strengthening means as well as interengaging side walls to completely enclose the rear of an electrical connector. The shell members are each further provided with overmolding pressure release means which opens at a predetermined pressure and allows a limited amount of overmolding material to enter the shell members while equalizing the inner and outer shell member pressures. The shell members also include gripping apertures which allow overmolding material to enter and harden thereby becoming fixedly attached to the shell members to prevent withdrawal due to shrinking as the overmold material cools.

Abstract: A multipart mold assembly for removably receiving a casing unit and positioning the casing so as to form, in combination with at least one of the mold parts, a cavity having the shape of an element to be formed in the mold and bonded to the casing. One mold part has a surface defining part of the shape of said cavity, and a casing skirt support surface forms another part of the cavity. A flash barrier is formed along a part of the skirt casing when a clamping ring formed from a plurality of individual clamping ring elements engages the surface of said casing skirt and urges it into fluid-tight relation with the casing support surface.

Abstract: A flash free, compression molded object which includes an insert and is formed using only one mold plate is disclosed. Molding compound is trapped in a mold cavity between the insert and mold plate. An extrusion vent allows excess molding compound and curing gases to escape from the mold cavity. Systems for forming a pin hole within the molded object and removing the molded object from the mold plate are also disclosed.

Abstract: In an apparatus for encapsulating objects in molded plastic packages, an improved removable cavity plate assembly comprises upper and lower cavity plates which fit together in an interlocking manner to define molding cavities having integral surfaces formed within a single cavity plate on all sides of the cavity but one. The fourth side of each cavity is defined by a surface formed by the interlocking juncture between the two cavity plates. Plastic packages molded in the cavities thus are formed without a seam or parting line along the sides formed on the integral molding surfaces, the seam or parting line being formed only on the surface defined by the juncture of the two cavity plates.

Abstract: Mold and method of compression molding shell half covers around a core to form golf balls. Opposed dies are pressed together such that some of the material trapped between the approaching dies is forced back into the mold to compensate for shrinkage and the remainder is forced outside of the die cavities where it can be drained off.

Abstract: The insert molding device provides a lead groove communicating with a clearance between a cavity and an inserted workpiece in a mold used for molding a plastic coating on part of the workpiece so that excess molten plastic enters the lead groove. The resulting casting fin formed in the lead groove can be easily removed with an automatic machine, thereby reducing the cost of the final product.

Abstract: Apparatus for encapsulating electronic components in plastic includes a press with upper and lower press members, upper and lower flat plastic carrier plates, and transfer injection means. The plates from a closed cavity and support the electronic component.

Abstract: This invention concerns a metal mold for the manufacture of a vulcanized reinforced hose by the compression and vulcanization of an unvulcanized hose in the cavity of the metal mold. This metal mold comprises a movable piece, a stationary piece, and a pair of inner pieces disposed between the movable piece and the stationary piece. The movable piece, the stationary piece, and the pair of inner pieces are severally provided at the inner sides thereof with depressions corresponding to the four equal parts into which the inner surface of the cavity of the metal mold is radially divided so that when the metal mold is closed, the pair of inner pieces are synchronously moved with the movable piece and the stationary piece in the direction of compressing the unvulcanized hose.

Abstract: A molding tool including an edge-sealing profile designed to bind the surface section of a molded article which is not to be coated, and which is integral with the surface of the molding tool that is under compression when the tool is closed.

Abstract: In the manufacture of eyeglass bows, a metal core (2) is placed in a mold (1) and is gripped at one end (3) before the mold (1) is filled with plastic material.To ensure that the metal core (2) can be held in position in the mold (1) as the plastic charge enters, the metal core (2) at that end thereof which is opposite to its gripped end (3) is joined to a tensile element (6), which extends out of the mold. The joint between the tensile element (6) and the metal core (2) forms a rated breaking point having a limited ultimate tensile strength. Before the mold (1) has been completely filled with plastic charge, a tensile stress in excess of the ultimate tensile strength of the joint is applied to the latter by the tensile element (6) so that the tensile element will be severed and pulled out of the mold (1).

Abstract: A method of insulating electrical connectors having terminals with leads extending therefrom by using a flexible insert arrangement for an electrical connector mold for supporting leads extending therefrom and closing the mold end which includes a flat resilient body having one or more lead-accepting depressions normal to the body across one edge thereof and an arrangement actuable as the mold halves are closed on one another for deforming the body to temporarily displace the body resilient material about each electrical lead extending from the mold to complete the formation of an insulating material-accepting connector forming cavity. A flowable insulating material is then injected into the cavity to form the insulated connector.

Abstract: A die for a soap bar is formed of two vertically separable half sections each having a cavity therein corresponding to one-half section of the soap bar. At least one of the cavities has a central vertical pedestal therein for supporting an insert in spaced relation to the surrounding cavity walls so that when the two die sections are advanced toward each other with a soap bar blank therebetween a bar of soap is molded with the insert embedded therein in a plane between and spaced from the opposite faces of the bar.

Abstract: A method of manufacturing an electrical connector utilizing an electrical conducting wire sheathed in a highly elastic, stretchy, squeezable insulating material and embedding it within a thermoplastic material through the use of high pressure injection molding. In the method, the sheathed wire is fitted with a heat shrinkable sleeve of plastic material that is subsequently drawn about the sheathed wire to form a rigid pressure barrier. The assembly is then disposed in a mold with the sleeve disposed in an egress of the mold and the thermoplastic material is injected. The sleeve will form the rigid plug-like cover which prevents the plastic from oozing by the squeezable insulating material.

Abstract: A method for making an annular shaft seal of the type having an elastomeric sealing element bonded to a metal shell having a guard or scraper portion having a sharp I.D. edge, in which the sharp I.D. edge is formed or "pierced" during the molding process simultaneously with the elastomeric sealing element being molded and bonded to the shell.

Abstract: A cable comprising a central armour, a dielectric helically grooved core and optical fibres housed in said grooves which are formed with a lip protruding from one edge is produced by extrusion of the profiled core on the armour heating of the core, laying of one fibre within one groove with the aid of a fibre guide controlled by a positioning slot in said core, bending the lip to close the groove outwardly and repeating said heating, laying, etc. . . for each fibre and taping the structure.

Abstract: A solenoid and electric terminal heads are embedded in plastic by injection molding. Die faces accurately position and orient contact surfaces on the heads relative to the solenoid and contacts on the solenoid plunger, eliminating subsequent machining. The solenoid windings and lead wires are encapsulated by plastic injected in the molding process through openings in the coil casing. Portions of the lead wires outside of the casing and contact posts connected thereto are also embedded in the plastic. Injection molded walls guide axial movement of a rectangular contact member with the plunger and prevent its rotation out of alignment with the terminal heads. A fibrous washer compresses axially under the die force to compensate for cumulative axial tolerances of the solenoid and terminal heads for accurately positioning the bottom of the plunger opening relative to the contact surfaces on the terminal heads.

Abstract: A bushing assembly adapted for installation as a feedthrough type of connection in a transformer, switchgear, sectionalizing point or any other application includes a cast conductor element embedded in a body of molded insulating material, and an insert preformed to close tolerances in said cast element and adapted to cooperate with a section of an insulating material mold to seal the mold during molding of the body of insulating material.

Abstract: In the manufacture of a gasket wherein a rigid, compression-limiting component is formed by molding in situ against the side of a preformed compressible gasket component to bond therewith, a narrow channel is pressed into the face of the gasket component during the molding operation. The gasket material is permanently deformed in this channel, which runs on the gasket face adjacent the edge of the side to which the rigid component is molded. The channel provides a durable, reproducible demarcation between the compressible and rigid components. Formation of this channel in molding has been found to prevent flashing of the material being molded, over the gasket face.

Abstract: A process for making an aural communications receiving device of formed-in-place elastomeric composition constructed especially to provide a smooth, tight seal over the mouth of the ear canal when stretched and including a formed-in-place sound transmitting passageway acoustically coupled to an integral connecting means for securing a communications component or to an embedded speaker at an outwardly presented surface.

Abstract: A flat contact terminal for use in small switches is disclosed which is constructed to prevent flash, or escapement of material from a mold, when the contact terminal is insert-molded into the plastic base of the switch. The contact terminal is deformed to provide angled surfaces on the contact terminal at the upper and lower surfaces of the base where the terminal extends from the base so that the angled surfaces of the contact terminal are wedged tightly against corners of the mold, thereby preventing the escape of plastic material from the mold during molding of the base around the terminal.

Abstract: A process for the preparation of moulded articles by the compression moulding at elevated temperatures in matched metal moulds of moulding compounds based on thermosettable unsaturated polyester resins, where at least one of the filler materials in the moulding compounds has a particle diameter greater than the width of flash channel of the mould used in order to enable moulded articles of improved surface finish to be produced.