Abstract: A method of and apparatus for injection molding solid steel-banded industrial rubber tires wherein a steel band is inserted in the bottom mold member cavity when the top mold member is in open position. Bite ring and knockout member components are contained in mold member cavity recesses. Closing movement of the mold members to mated position seals the bite ring and knockout member components against the steel bank and mold member recess surfaces to prevent leakage of injected rubber compound from the cavity during injection and curing. The mold has an internal wedge member which expands a split ring against the steel band when the mold is closed to prevent band distortion from pressure existing when the mold is injected and the rubber is cured therein to form the tire tread portion which is bonded to the steel band during curing. Mold components knock the cured tire out of the top mold member upon opening the mold.

Abstract: A reinforced synthetic resin pipe is produced by winding a reinforcing material about a core bar suspended vertically for preforming the pipe, inserting the core bar holding thereabout the preformed reinforcing material into a mold into which a predetermined quantity of the liquid synthetic resin has been poured, pressing the core bar into the mold while applying vibration to the core bar or to the mold, stripping the core bar from the mold after the synthetic resin has been hardened, and separating the hardened molding from the core bar or the mold.

Abstract: A method and device for embedding in a plastic block a selected part of a specimen being prepared for microscopic examination. The device has a frame with a horizontally disposed base member and a vertically disposed headboard and footboard. A mold jockey slides longitudinally along the base member. A slide jocket slides transversely to the direction of motion of the mold jockey and supports a glass microscope slide horizontally above the mold jockey, such that a mold held in the mold jockey may be moved beneath any selected location on the microscope slide. A constricted mouth of a plastic mold held in the mold jockey is pressed against a plastic impregnated specimen held to the underside of the microscope slide. The plastic is cured, embedding a section of the specimen in the face of the plastic block formed within the plastic mold. After curing, excess plastic is removed, leaving the selected portion of the specimen embedded in the end of the plastic block, with a known orientation and location.

Abstract: A mold having a vee-shaped groove receives an optical fiber end in butted relationship with either another fiber end or with a mold wall surface which is perpendicular to the vee-shaped groove. Field forces are generated which urge unattached and disposable fiber seating elements into the groove, the seating elements in turn pushing the optical fiber end(s) into the groove until the side surface of the optical fiber end(s) are in tangential contact with both sides of the vee-shaped groove. While the optical fiber end(s) are so positioned, casting liquid is introduced into the vee-shaped groove. The seating elements remain within the casting.

Abstract: A coiled section (16) of a plastic sheathed stub cable (10) is placed on a support (43) which is orbited about a longitudinal axis of a straight section (13) of the stub cable. The straight section of cable is positioned coaxially within an aperture formed in a casing part (12) which is mounted in a rotating nest (16). The juncture (70) between the apertured casing and the cable sheath is heated (81), whereafter a bead (91) of bonding material is extruded around the juncture. A molding die (106) is moved onto the extruded bead to force portions of the bead into the juncture to form a homogeneous weld with the cable sheath and casing parts while uniformly shaping the remaining portions.

Abstract: In a method of injection-moulding articles of plastics material onto a preformed web inserted into the mould, the web is held under substantially constant tension during the closing of the mould, between a pair of clamps, the proximal clamp being fixed relative to the mould and the distal clamp free but bearing a load to furnish the desired tension in the web. The load may be imposed by a weight attached to the distal clamp, conveniently by means of an electromagnet.

Abstract: Apparatus for splicing ends of a sheave insert material in which the ends of a premeasured length of an elastic, thermoset sheave insert material are laminated together in a special splicing jig for fabricating a unitized insert loop, which is subsequently stretched around a sheave into a preformed insert receiving slot along the circumference thereof. The jig holds the ends of the premeasured length of insert material in alignment as a heated mold, included therein, fits snugly around the ends and applies heat to the joint therebetween, into which the insert material, in liquid form, has been inserted to join the ends. The heat thus applied to the joint accelerates the curing of the liquid into the same consistency as the insert; thereby producing a unitized bond between the ends by which the unitized loop is thus formed.

Abstract: Apparatus for forming a concrete shield around a sprinkler head is a frusto-conical shaped form having a removable concentric flexible sleeve therein. A rotatable trowel is positioned inside the form to smooth the upper concrete surface. An inverted cup adapted to fit over the head of the sprinkler during the concrete forming process prevents wet concrete from contacting the top of the sprinkler head.

Abstract: An injection mold for encapsulating inserts is described having means to apportion mold clamping forces to simultaneously close the parting line of the mold and rigidly clamp an insert within the mold cavity, whereby inserts of various thicknesses can be accommodated.

Abstract: A method of and apparatus for injection molding of injection molded parts containing imbedded inserts, especially injection molded parts formed of a thermosetting plastic, comprising an injection molding machine equipped with an injection nozzle located at an injection molding position and a divided injection mold having hollow mold compartments or cavities. The injection mold is operatively connected with the injection nozzle and one of the cooperating mold halves is connected with a stationary mold support plate and the other mold half with a movable mold support plate displaceable towards and away from the stationary mold support plate. At an insert element-filling position removed from the injection molding position there is provided means for delivering and introducing the insert elements into the hollow mold compartments.

Abstract: This invention discloses a mold design which limits the maximum pressure that can be developed inside a closed cavity containing a polarized ceramic as a result of the volume expansion of the molding compound during the curing cycle. The pressure control is achieved by interposing a spring member between the mold and the pressure source which closes the mold. The spring will deflect slightly to absorb any volume expansion of the molding compound during the curing cycle, thus preventing any significant increase in pressure in the cavity and thereby preventing depolarization of the ceramic.

Abstract: An apparatus for continuously producing finished prestressed concrete wires along a prestressing bed with a plurality of prestressing members which extend along the prestressing bed and which are arranged to pass through the concrete members when formed. The apparatus includes a scaffold which spans the prestressing bed in a gantry-like fashion and is supported for movement in a direction parallel to the bed. The scaffold extends over at least two adjacent stations along the prestressing bed for producing the finished prestressed concrete members. A number of vertically movable lower form members are carried on the scaffold for movement to a lowered position on the prestressing bed for receiving fresh concrete to form the concrete members. After the concrete members are formed and bonded the lower form member may be raised away from the finished concrete member.

Abstract: To permit simple manufacture and reliable attachment of the center electrode into a ceramic body, an elastic tubular press mold is located in a press body, the press mold being closed off by a movable plug having a needle-like extension with a gripping end formed thereon to receive the center electrode before the plug is inserted into the tubular mold. Ceramic material is then filled into the mold, the plug closing off one end thereof, the mold is closed with a second plug, and pressure in the order of from 250 to 400 bar applied to the outside of the elastic mold to compress the ceramic material and embed the center electrode tip therein. Upon release of pressure, the compressed ceramic, with the center electrode therein can be removed from the holding tip of the needle-like extension of the plug, for subsequent grinding to size, sintering, firing, and glazing, if desired.

Abstract: A process and machine are described for the continuous production of reinforced concrete blocks in which a reinforcement member is cut and formed, positioned in an area of a molding station, a divided mold cavity is then defined about the reinforcement member and a paired block formed about the reinforcement member by introduction into the molding cavity of a hot slurry of cement fluid. The paired block thus formed is advanced on a pallet about circular conveyor means, passing through a curing area and ejection station where the cured block is removed from the pallet and the pallet returned to the molding station.

Abstract: A mold is described for the encapsulation of electrical components with a thermosetting resin composition, particularly components which have either no lead-out wires or such wires which are not suitable for locating the component within the mold. Fitted into opposing walls of the case of the mold are at least one pair of solid plugs of a flexible material, the plugs extending into the interior of the mold and being of a material which has a higher coefficient of cubic expansion than that of which the mold is constructed. The plugs are arranged to grip the component even though the mold walls expand outwards when the mold is heated to cure the thermosetting resin.

Abstract: A process for forming a removable dental cast embedded with a plastic, threaded, cast ejector button, and apparatus for fabricating a plurality of cast ejector buttons comprised of a mold device including an upper plate containing a plurality of mold cavities, and a base plate incorporating coil spring means for resiliently maintaining the upper plate in a predetermined spaced-apart and open relation thereto and a plurality of rigid support elements attached, at their bottom ends, in vertically-upright relation on the base plate and slidably engaged, at their upper ends, in a bottom opening in each upper plate-mold cavity and extending in overlapping relation into the respective cavity. The upper ends of each rigid support element are threaded so that, when the mold cavities are poured with and filled by a suitable material, in the plastic flow form that is allowed to set for a specified period, a separate and internally threaded plastic cast ejector button is formed in each cavity.

Abstract: An improved apparatus and method is provided for molding a plurality of plastic characters on the upper surface of a plastic blank having a passage at each location where a character is to be molded. Rotatable die wheels having character defining recesses or cavities are disposed at a molding station above a support for the blank. These die wheels are rotated relative to each other to align cavities defining selected characters directly above the passages in the blank. The aligned die wheels are then moved into abutting engagement with the upper surface of the blank with the passages in the blank communicating with the cavities of the wheels which define the selected characters. Plastic material is then forced through the passages in the blank and into the cavities to simultaneously mold the selected characters on the upper surface of the blank.

Abstract: The invention relates to a method of forming a moulded product comprising a reinforcement encapsulated in a plastics material. The reinforcement is supported in a mould cavity spaced from the surfaces of said mould cavity by support pins which are retractable into the mould surfaces. During an initial part of the moulding operation some of the plastics moulding material enters one or more reservoirs each formed in or around one of the support pins, the reservoirs opening into the mould cavity and extending inwardly of the mould surface, and on retraction of each pin, a piston, working in each reservoir, forces the moulding material out of the reservoir into the vicinity of the part of the mould cavity previously occupied by the pin.

Abstract: A molding machine for producing products of a rubber-like resilient material, particularly oil seals in which a first mold part is stationarily supported in axial spaced relation to a main base, a base between the main base and first mold part is axially movable toward and away from the first mold part and supports a second complementary mold part, a holder between and axially spaced from the first and second mold parts is mounted for limited axial movement and rotary movement in a plane parallel to the first and second mold parts, with the holder carrying two diametrically opposite further mold parts spaced apart an equal distance from the axis of the rotary movement and one of the further mold parts being in substantially registry with the first and second mold parts so that movement of the base relative to the holder brings the second mold part into operative relation to the one further mold part and continued movement of the movable base moves the holder toward the first mold part until the first mold par

Abstract: An apparatus for manufacturing fluid seals, which includes first and second mold parts movable along a given axis between open and closed positions. One mold part has a radially extending mold surface adapted to receive and support one surface of the flange portion of an insert to which a molded part of the seal is to be bonded, and the other mold part has a portion adapted to engage an opposite surface of the flange to hold the flange against the receiving and supporting mold surface to prevent leakage of fluid material from said cavity along the flange.

Abstract: Certain articles, including easy-open sheet metal can tops or covers, include closures which are, at least in part, defined by indentation and/or fracture through the metal. This invention provides a high speed mechanism for coating particular portions of the articles, for instance for sealing only the fractured locality of each successive cover, a shallow printing on applicator being in timed communication with a source of hot pressure fluid such as a hot melt or lacquer. A hold down or backing member precisely cooperates with the applicator in relative reciprocable, high speed to insure that sealant fluid is applied to the predefined locality of the article, and resilience in the article and/or sealing means such as O-rings of the applicator is, in effect, relied upon to provide dwell during the moment of coating thus providing rapid, economical production.

Abstract: A die closing unit for injection molding machines producing articles with embedded insert parts, where the injection molding die includes several identical transfer sections which are movable between a closing station in alignment with the other die sections and a loading station in which the insert parts are placed into the transfer section of the die. A vertically movable die carrier, positioned just below the closing station, receives a transfer section of the die from a transfer station, as the transfer section is shifted horizontally into the closing station in a first embodiment, or lifted vertically into the closing station in a second embodiment. In each case, the transfer section thereby becomes independent of the transfer platen which moves the transfer sections between the transfer and loading stations.

Abstract: A method and apparatus for packaging electronic components such as for example pulse transformers or the like with a thermosetting material such as for example a phenolic or epoxy resin. A pulse transformer element comprising a toroidal ferrite core having coils wound thereon embedded in a thermosetting base member provided with an intermediate flange-like portion, and terminal pins, is inserted in a lower mold cavity formed in a mold magazine, with the terminal pins inserted in elongated slots formed in the bottom surface of the lower mold cavity which is isolated by the pulse transformer element per se from the upper mold cavity into which the thermosetting material is injected.

Abstract: Disclosed is a method and apparatus for continuously molding plastic parts. Basically, the apparatus comprises a pair of spaced, rotatable, indexable trunnion transfer units or wheels having a plurality of cradles thereon for receiving and transporting carrier bars. The wheels are indexable to a number of stations at which various activities take place and are positioned on either side of the mold area of a conventional molding machine. A carrier bar having affixed thereto a plurality of cores for the part to be molded, for example, is transported by the rotating wheel from the bottom of the first wheel to a first station where an insert may be added to the core and thence to the top position of the wheel where the carrier bar is transferred to a conveyor which in turn transports the carrier bar to the mold. After completion of the molding cycle, the carrier bar with the molded parts thereon, is transported by the conveyor to the top of the second wheel where it is inserted thereon.

Abstract: An apparatus and method for molding an article such as finished seal of known type, comprising a flexible member bonded to a rigid element. During conventional manufacture, the rigid element is clamped between upper and lower seal-forming molding elements and, in many instances, after engagement of the rigid element, continued traveling of the upper and lower molding elements toward each other is used to provide a "closed stroke". In the closed stroke operation of the present invention, the continued traveling in the closed stroke stage requires no substantial deformation or shaping of the rigid element.An apparatus and method is disclosed in which the molding elements include an outer movable, biased, annular casing engaging element, for example a ring, which is biased in an extended position. The ring is retractable against the bias during the continued travel of the molding elements in the closed stroke.

Abstract: Apparatus for constructing reinforced concrete modular construction units comprising longitudinally extending multi-sided construction units. Reinforcing bars and mesh are formed into a cage of the desired size and shape for the particular unit. Such cage is mounted on a rotatable shaft which may also be raised and lowered relative to a horizontal bed. Each side of the modular construction unit is in turn positioned in a perimeter form on the bed in which the concrete is poured and finished flat to form each side of the modular unit. After each side has cured a sufficient time to insure its structural integrity the cage is raised and rotated to align another side of the cage with the horizontal bed. The cage is lowered into position adjacent the bed in a suitable form and concrete is poured around the reinforcing structure on that side of the cage to form that side of the wall of the building. Successive sides are similarly formed until the longitudinally extending hollow construction unit has been completed.