Abstract: A carrier ring for achieving attachment to the thermoplastic perform as the preform is formed in a split injection mold is disclosed. The split injection mold defines a mold cavity into which a core pin is positionable. The mold cavity, along with the position core pin, defines the principle portion of the preform cavity. The remainder of the preform cavity is provided by an annular groove in the carrier ring. This annular groove has a substantially horizontal outwardly extending first wall, a substantially horizontal inwardly extending second wall downwardly displaced from the first wall, and a downwardly and inwardly extending third wall emanating from the outwardmost extent of the first wall and terminating at the inward most extent of the second wall.

Abstract: A device and method for flash suppression in a molding with rotation system having a non-rotating mating surface capable of venting gases during the molding process while simultaneously suppressing flash. Flash is directed inwardly and away from the mating surface and contained between a mandrel and mandrel housing in a low pressure reservoir which is completely separate from the mating surface. A cooling fluid is utilized to carry away flash particles from the low pressure reservoir and thereby further prevent contamination of the mating surface.

Abstract: A container mold comprising a mold cavity portion and a mold core portion with the cavity and core portions being relatively moveable between a closed and an open position. By this invention, means are provided for molding a recess-defining flange in the container.

Abstract: An apparatus for forming concrete burial vaults and the like. The apparatus comprises a plurality of forms which are movable independently and as a unit in a series of operating steps to form a completed vault. Drop-in apparatus for forming a compound vault is also described.

Abstract: An apparatus for constructing a unitary pre-cast concrete modular building unit comprising: a collapsible outer form having a rigid rectangular base and rigid walls pivotally connected thereto and collapsible to the plane of said base; a hydraulically retractable inner form thus providing with the outer form, a mold for said building unit; and an extruder for removing said inner form from said building unit.

Abstract: A mold defining a mold cavity for manufacture of an article, the mold comprising a plurality of mold side wall members, each of the side wall members including opposite end portions and including an inwardly facing surface comprising a mold surface for forming at least a portion of a side wall of the molded article. The side wall members are moveable from a closed position wherein the side wall members cooperate with said first and second end wall members to define a mold cavity conforming to at least a portion of the desired exterior dimensions of the article, and an open position in which each of the side wall members is displaced laterally outwardly of its closed position and away from the end wall members to a location in spaced relation from the end wall members.

Abstract: Disclosed are methods for production of plastic optical fiber connectors specifically for production of plastic plug ferrules employable for plastic optical fiber connectors, wherein improvements are realized to decrease the production cost thereof, to enable accurate finished dimension thereof, to enhance the advantage of mass production thereof, and to decrease the connection loss thereof.

Abstract: A mold which comprises a number of circumferential throttles, at least partly located on the sides of the cavity and core parts respectively. The throttle distance is significantly shorter than the adjacent wall thickness, the pitch between throttles is such that stacking of the molded product is possible. The mold may comprise a number of feed channels leading from one throttle to the next throttle. The mold differs among other factors from the prior art by its short throttle distance, by its flow channels, by the throttles being located on the sides of the products, and the number of throttles being more than one. The throttles improve the rigidity of the molded thin-walled hollow product. When the molded product is a hand-held venting cup the throttles prevent buring of the fingers.

Abstract: A molding core has side by side segments assembled for rocking about pivots intermediate their ends, and are rocked to their alternate positions by an actuating pin (or pins) having camming surfaces for that purpose, arranged for non-interference of the pin with the rocking movements of the segments.

Abstract: A form for preparing a poured concrete hollow shape having a transverse hole through a wall of the shape comprising a form of at least one releasable section, a central core for said hollow, and a core for said transverse hole abutting said central core and said releasable section; said transverse hole core having a surface of a fluorocarbon elastomer where said surface is contacted by poured concrete.

Abstract: A improved apparatus for molding pipes is dislosed. A hood of convex shape having an outer surface corresponding to the shape of the interior of the pipe and has an annular rim on the widest part thereof and a molding shank rigidly attached to the narrowest part of the hood. A flat annular washer is support on the rim and being separable therefrom to provide a flat terminal end for the molded pipe.

Abstract: The invention provides apparatus and method for forming concrete blocks, panels and the like with a reduced number of parts and production operations. The apparatus and method of this invention is contemplated for use at a concrete-mixing plant having the usual components such as mixers, hoists, cranes, and other transport facilities available at most modern mixing plants. The apparatus of the invention includes a pallet having a generally flat upper surface. In addition, there is provided a generally rectangular mold frame having four integral and generally vertical upstanding sides. The frame is generally open on the top and bottom and is dimensioned for matably mounting on the pallet. Cavity-shaping means are mounted within the frame and above the pallet for shaping block-forming molding cavities which are arranged for receiving concrete aggregate thereinto, whereby blocks may be formed by the deposition of the aggregate thereinto.

Abstract: A bucket shaped container having a rim opening smaller than the diameter of the sidewall thereof is injection molded from thermoplastic material using a die set including a molding core which collapses to allow axial removal of the molded container from the mold. The molding core comprises a plurality of individual, wedge shaped outer core sections which collectively form a continuous molding surface and are slidably mounted on a tapered inner core to allow axial sliding movement of the outer core sections relative to the inner core. Each of the outer core sections is also mounted for radial sliding movement on a mounting plate which circumscribes the molding core and is mounted for reciprocating axial movement relative to the inner core. Reciprocation of the mounting plate produces simultaneous axial and radial movement of the outer core sections throughout their entire lengths between an expanded molding position and a collapsed container releasing position.

Abstract: This is a molding apparatus designed to mold a plastic tub of circular transverse cross-section and re-entrant shape. Specifically, the tub tapers from its closed bottom to its opened top. The mold core is, therefore, collapsed radially to permit extraction of the plastic tub from the mold. This radial collapse is accomplished by forming the mold core of a central segment and a plurality of peripheral segments, and then axially extending the central segment while moving the peripheral segments along a radially inward path so that core collapse occurs. The exterior shape of the peripheral core segments defines a circular cross-sectional shape for the interior of the tub, despite the fact that the central core segment has the configuration of a hexagonal pyramid. Side mold segments which move radially outwardly and a tub extraction ram complete the equipment for extracting the tub from the mold.

Abstract: A mold unit and method for casting ceramic material in slip form is described. Each mold unit comprises a plurality of parts which when assembled for a casting operation define between them, two casting cavities, the casting cavities are positioned one above the other, into which slip can be introduced to form discrete articles and when removed from the mold while in the green condition are assembled to form a composite article.

Abstract: In a metal mold for molding a hollow product having inwardly tapered side wall with a stationary die plate for forming a bottom portion of the product, a core, and a cavity plate surrounding the core, the core has a truncated pyramid shape and first and second slide cores are provided between the core and the cavity plate. The core and slide cores are constructed such that at the time of opening the mold both slide cores are moved inwardly in an interlocked relation with retractive movement of the core thus leaving one end of the molded product for enabling removal thereof.

Abstract: An improved electrical connector assembly (10) is disclosed. The assembly is especially adapted for engagement with a printed circuit board (76) having electrical circuits formed on both sides thereof. The assembly includes a body (12) of molded dielectric material having four spaced rows of passages (24) extending therethrough from a front face (26) to a rear face (28) of the body. The assembly also includes brush wire electrical contacts (14) each received in its respective passage. Each of the contacts has a cylindrical body portion (62) and an elongated tail (64) attached to one end of its body portion. The ends (72) of the termination portions extend beyond the rear face and form two spaced straight line rows adapted to receive the printed circuit board therebetween. The ends (63) of the body portions opposite their respective termination portions comprise four spaced apart, straight line rows of body portion ends.

Abstract: An injection mold comprises an outer mold structure defining an abutment surface and a core axially slidable in this structure between a molding position and a second position. The core defines a mold cavity with the outer mold structure in the molding position to mold a tubular end portion of a synthetic thermoplastic resin article therein. The core includes an annular rib defining an internal peripheral annular groove of the end portion and an end to which a mold sleeve is axially immovably connected. The mold sleeve has an end face facing and conforming to the abutment surface upon axial sliding of the core into the molding position. The mold sleeve and core end have converging confronting surfaces defining an annular gap tapering toward the core end, the annular gap defining a free end of the tubular end portion extending outwardly from an annular section thereof surrounding the groove.

Abstract: A concrete post molding device is disclosed for simultaneously forming a plurality of uniform, reinforced concrete posts. The device includes a housing containing an annular chamber defined by a fixed horizontal first plate having a central cylindrical pipe and a spaced concentrically arranged sleeve vertically supported thereon. A plurality of circumferentially spaced radial fin members are connected with the pipe for dividing the chamber into a plurality of circumferentially arranged vertical compartments, and the first plate contains a plurality of openings arranged opposite the compartments. The concrete post molding device is characterized by novel reinforcing rod suspension and tensioning apparatus. An annular ring is connected with the upper portion of the pipe and includes a plurality of first chucks for gripping the upper portions of the reinforcing rods. The lower portions of the rods are suspended in spaced relation in the compartments and extend vertically through the first plate openings.

Abstract: Method for slip casting toilet bowls and as mould for casting ceramic material in slip form, including a compartment having an air impermeable wall and arranged, in the casting position of the mould, so that when the mould is filled with slip air is trapped in the compartment. The compartment is located at a region where casting is not to occur and the trapped air not only achieves this but also prevents the surface of the compartment from becoming wetted, thereby making subsequent cleaning easier. The compartment may be formed either in a plaster mould part and its surface rendered air impermeable, or in a separate part made of air impermeable material, and assembled with the plaster mould parts. The mould is particularly suitable for casting a water-closet bowl, the compartment being located at the region where the open top of the bowl is formed.

Abstract: An apparatus and method for producing a plurality of substantially dimensionally identical concrete structural modules. The apparatus facilitates the manufacture of a plurality of low cost molds of high dimensional accuracy which will consequently produce modules of high accuracy which can be interchanged, turned, and either horizontally or vertically assembled. A master pattern of the module having non-porous interior and exterior surfaces is positioned between inner and outer forms, the inner and outer spaces thus created are filled with a cementitious substance forming a mold having inner and outer mold segments with their mold faces formed against the non-porous pattern. The concrete molds are provided with various assembly mechanisms and shipped in matched sets to producers for use as forms in the production of the structural modules.

Abstract: A collapsible mold core comprises an inner core member defining opposed first and second ends. The inner core member tapers transversely to a reduced diameter from the first to the second end. A plurality of outer core members are attached to the lateral exterior of the inner core member in longitudinally slidable relation to it between first and second sliding positions. The outer core members define first and second ends corresponding in position to the first and second ends of the inner core member, with the outer core members tapering inwardly in transverse dimension from their second to their first ends to provide an opposite taper to that of the inner core member. The mold core is of lesser transverse diameter in the second sliding position than in the first sliding position. This permits the molding of an object such as a straight-walled bucket having an inwardly-projecting lip about the mold core while it occupies the first sliding position.

Abstract: Method and apparatus for pre-casting box-like reinforced concrete modules on assembly line. Apparatus includes pair of movable interior forms for defining the interior surfaces of side walls and ceilings whereby one interior mould at a time can be removed when concrete is in semi-cured condition. Method includes casting floor with short upstanding side wall portion to serve as guide for interior forms when moving forms onto floor slab. Method also includes use of integral multiples of four serially arranged casting beds on which various procedures for forming modules proceed simultaneously and progressively.

Abstract: A mold for the production of a reinforced plastic tubular body having an annular groove such as a pipe coupling, the mold having a mold body and detachably mounted on a predetermined position thereof, an annular groove former consisting of a surface layer of an elastic material and a core covered with the surface layer. The reinforced plastic tubular body is produced by forming a layer of a molding material around the aforesaid mold, curing the layer of molding material, separating the mold body from the cured layer of molding material, and then separating the annular groove former from the cured layer of molding material by removing the core and then removing the surface layer.

Abstract: A cover member for a safety air-cushion device is made up of a bag-shaped outer laminate of high density polyurethane foam, and a bag-shaped inner laminate of low density polyurethane foam which is integral with the outer laminate, the inner laminate being made by pouring the fluidized foamable material into a mold after solidification of the other fluidized foamable material having been poured into the mold for the formation of the outer laminate.

Abstract: A method and apparatus for a universal winding arbor including an arbor core adapted for use with a plurality of differently sized arbor blocks in winding transformers of different sizes. Each differently sized arbor block may be formed in a unique mold which includes a vertically adjustable side and horizontally adjustable side to vary the thickness and width respectively. The arbor core is centered within the mold and a liquid resin is allowed to cure in the mold to form the winding arbor.

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.

Abstract: A baking mold assembly employing a plurality of spaced vertical batter containers removably positioned on a horizontal base plate. Each batter container consists of two removable tubes, one concentrically about the other end, with sufficient space between them for the inclusion of a batter.

Abstract: An embossed article such as a plastic bowl is injection molded between the molding surfaces of an unidirectional mold. The outer molding surface is inclined outwardly from bottom to top and is provided with an engraved area in which the boss is formed. The undercut upper edge of the engraved area is slanted in a manner to provide an inclined lead in surface on the boss. The undercut of the lead in surface is slight enough that the boss is able to release from the engraved area without damage as the mold opens in unidirectional fashion for removal of the molded article.

Abstract: An injection molding apparatus, including a mold having a mold cavity therein defining the outer periphery of a pipe fitting, has a core pin assembly adapted to be positioned in the cavity and which comprises opposing distal core sections whose proximal ends abut an intermediate core section therebetween. The core sections are mutually separable and have passages for accommodating a fluid coolant therein, and when the core sections are assembled, at least certain passages in either or both distal core sections are in fluid intercommunicating relation with passages in the intermediate core section.

Abstract: Apparatus for molding rigid foam components of semicircular cross section suitable for insulating pipes and the like. A female molding component is formed of sheet metal material supported by a plurality of spaced, rigid crossmembers. This female component supports a top panel, the underside of which, in turn, supports a male mold component the semicylindrical surface of which is formed of sheet metal material which is supported by a plurality of spaced, semicircular rigid support members. When the mold is charged with an expansible foam, the pressure thereof serves to maintain the integrity of the mold profile. The design of the mold permits its fabrication utilizing relatively inexpensive material thus permitting the formation of rigid insulative foam segments at desirable unit cost levels.

Abstract: A building construction system uses a mold set up at a construction site so that the external part of the mold is spaced clear of the internal part. Building elements including those which are functional in the construction operation are arranged around the internal mold part. Such functional elements include connecting rod anchorages around the lower region of the mold, and the like. The external mold part is moved into position near the internal mold part, and the mold is filled to form a casting. A lifting frame is arranged over the mold and adjustably connected to the connecting rods. Then the external mold part is moved away to release the casting, and the frame is lifted to raise the casting up over the mold for movement to a building site near the construction site.

Abstract: In a method of casting in a horizontal mould a hollow, reinforced tapering concrete post having a thin wall and particularly a length exceeding 10 to 15 m, there is placed in the mould a tapering reinforcing cage or basket in which a core, e.g. a steel core, is inserted to form a substantially annular mould chamber. Said mould chamber is closed with the exception of an upper filling slot. A readily pourable concrete mass is charged to the mould from above through said filling slot. The mould is then vibrated without being rotated such that concrete fills the annular mould chamber. Hardening of the concrete is accelerated by heating, and the core is withdrawn from the formed post before the concrete has completely hardened. The finished post is then removed from the mould.

Abstract: The specification discloses a plastic collapsible article carrier having open and collapsed positions and adapted to be formed by the injection molding of plastic within opposing dies. The article carrier includes first and second end walls parallel to one another when the carrier is in the open position. The carrier further includes first and second side walls parallel to one another, which are hingedly joined to edges of the first and second end walls to extend perpendicularly to the first and second end walls when the article carrier is in the open position. Portions of the side walls have heights less than the height of the end walls. The first side wall is vertically spaced from the second side wall such that portions of the side walls are vertically offset to enable molding thereof in opposing dies.

Abstract: A filler neck for mounting between a fueling port and a fuel tank provides fuel entry into the tank and venting of fuel vapor from the tank while being serviced from a fuel dispensing nozzle having vapor recovery means. The filler neck comprises a reinforced rubber filler hose having a bore diameter sufficient for receiving the nozzle while also providing a vent path for fuel vapor from the tank through a vent hose mounted inside the filler hose bore. The internally vented filler neck is adapted for crash-proof fuel tank assemblies and eliminates multiple connections necessary on externally vented tanks. A mandrel assembly is also disclosed for making the internally vented filler neck.

Abstract: The following specification describes a paint can mold in which a pair of concentric ring members and cores at diametrically opposed positions create concentric mold cavities for forming projecting bushings on the pail, each having a concentric handle bearing. The plastic for forming each bearing and a handle interconnecting the bearings passes through a gate in each ring member. Withdrawal of the ring member severs the plastic in the gate from between the bushing and bearing so that the handle is free to rotate on the bushings. Means are provided to prevent disassembly of the handle from the can.

Abstract: Improved apparatus for forming hollow cylindrical pipes of reinforced concrete wherein the pipe is formed in a vertical position and the principle components for forming the pipe comprise a bottom pallet and saddle, an outer jacket, a core positioned concentrically in spaced relationship within the outer jacket and a reinforcing cage positioned between the center core and the jacket and sealing means are provided for sealing the relationship between the bottom pallet, the outer jacket and the inner core. Use is made of movable elastic seals on the lower ends of the outer jacket and the core. The seals can be expanded inwardly toward the pallet by means of a positive pressure until the concrete has been poured into the form and compacted by vibration. Negative pressure is then utilized to withdraw the elastic seals from the formed pipe and the inner core and outer jacket are subsequently removed from the green pipe.

Abstract: A pair of like mold parts are juxtaposed to form a mold cavity having a relatively large maximum cross-sectional size and an opening of relatively small cross-sectional size. A core is positioned in this cavity and has a body of cross-sectional size greater than that of the mold-cavity opening and having a neck extending out of the cavity through the opening and blocking this opening. A mass of hardenable material is introduced into the cavity around the core and is hardened. Thereafter the core is elastically deformed and withdrawn from inside the hardened mass whereupon the mold parts are displaced apart to demold the hardened mass.

Abstract: Monocoque bodies for transport units are manufactured by joining together two separate parts, a main structure consisting of the bottom and side walls as the first part and the roof as the second part. Each part is produced from a plastic material by using a single two part mold.

Abstract: Fluid concrete is provided to apparatus which shapes the concrete into a desired form and may stack the finished products for removal by an operator. A concrete receiving portion of the apparatus holds the fluid concrete and discharges selected amounts thereof into a vertically open mold. The mold and the fluid concrete therein are supported during filling by a forming table. A compaction member is inserted into the mold to distribute and compact the fluid concrete therein, after which the mold may be removed from the table and held for vertical movememt by a mold carrier. Withdrawable support plates at the bottom of the mold support the shaped product therein after the mold has been removed from the forming table, with these support plates being selectively withdrawn to allow release of the shaped product from the bottom of the mold. A shaped product stacker is provided beneath the mold in position to receive shaped products released therefrom, and to stack a plurality of such products.

Abstract: A molding apparatus is described having a body portion with a mold cavity therein and a core means within said cavity having a core follower thereon which is designed to move along the core during the molding operation. Utilization of the core follower permits rapid and accurate formation of multiple lumen tubes, particularly those having arcuate shapes.

Abstract: A moulding method utilizing apparatus for forming a monolithic reinforced concrete modular building structure comprising walls and floor with apertures therein for doors, windows and the like. The apparatus comprises separable mould components in the form of a floor, end walls, side walls and a core moveable into cooperation with each other and a wheeled pallet to define a moulding cavity for forming the module, and out of cooperation to leave the formed module free for withdrawal on the pallet from the apparatus. The moulding apparatus is controllably connected to a source of pressurized wet concrete for filling the mould and is enclosed within an autoclave for accelerating the initial curing process of the concrete in the mould by heating.

Abstract: An annular bronze bearing is bonded to a cylindrical inner surface of a metallic member by positioning the member in a fixture to define an annular chamber therein, communicating a charge of bronze alloy particles to the chamber via an open end thereof, melting the alloy and cooling the member and alloy to form the bearing. The apparatus comprises a pair of plates adapted to clamp the metallic member therebetween to define the annular chamber between the member and a cylindrical core. A ceramic funnel is secured on the upper one of the plates to communicate the melted bronze alloy particles to the annular chamber via the open end thereof.

Abstract: The present invention is directed to a mold containing an improved core for use in casting hollow, metallic articles. The core is formed of, or covered with, a layer of cellular material which possesses sufficient strength to maintain its structural integrity during casting, but will crush to alleviate the internal stresses that build up if the normal contraction during solidification and cooling is restricted.

Abstract: An outer mold part is positionable over an inner mold part. Lever means are carried on opposite sides of the outer mold part and operable by a lifting force to exert a separating force between the outer and inner mold parts. Lever means are carried by the outer mold parts for locking the molded article to it. The outer mold part and the molded article are lifted upwardly together as an assembly and are removed entirely from the inner mold part. The assembly is then set down, the outer mold part is unlocked from the molded article, the outer mold part is then picked up and removed from the molded article, and then the bottom is poured in and is connected to the molded article.