Abstract: Embodiments of the Concrete Form include a form tube, chamfer disk, and one or more form cross-members. The form cross-members are comprised of a center pivot, two bolt guides, which are formed by the cross-members, and an optional clamp. The chamfer disk is a disk that sits atop of the form tube and forms side chamfers when placed upon the form tube when the concrete cures. The chamfer disk is a separate formed or molded piece that will sit on top of the tube form in order to form a chamfer in the concrete. The chanfer disk is a ring-shaped device with the chamfer formed in positive relief under the ring of the chamfer disk. The optional clamp can be used to hold any conduit, tube or any other item during the pour.

Abstract: A system includes one or more compacting wall retraction mechanisms for retracting one or more compacting walls of a compactable lightweight concrete block mold having at least two compacting walls. The compacting wall retraction mechanism(s) facilitate release of a compacted lightweight concrete block from the compactable lightweight concrete block mold. The system can include a mold feed conveyor, and a table for receiving the compactable lightweight concrete block mold from the mold feed conveyor. The system can include one or more tube extraction and re-insertion mechanisms for extracting or inserting tubes of a compactable mold. The system can include one or more end wall lock release mechanisms for releasing end walls to remove a molded block from the mold. Mold assembly and disassembly can be controlled by an electronic or computerized controller.

Abstract: A compactable mold comprises a main mold frame structure and plural wall structures including two end wall structures and two side wall structures. The plural wall structures define a mold cavity for forming a block from a mixture introduced into the mold cavity. At least two of the plural wall structures are movable wall structures for compacting the mixture. A described compactable mold has end walls and side walls that are shaped for forming tongue and groove features on a compacted block, and the end walls and side walls are movable such that a formed block can be released easily from the mold. A described compactable mold comprises at least one tube attached to at least one of the compacting wall structures. The compacting wall structures are operable to compact the mixture by moving toward the center of the mold cavity while the at least one tube remains stationary.

Abstract: At the filling station of a dry cast pipe making machine for making pipe lined with a plastic liner, the liner is first placed over the core and then a plurality of spaced-apart, removable L-shaped plates are secured around the top edge of the core. One leg of each plate extends inside the core with the other leg extending downwardly over the top edge of the liner. The plates are removably held in place on the core by the use of a clamping device, such as a vise-grip, for example. Once the form is filled with concrete and ready for the pressure heading step, the downwardly extending legs of the plates serve as ‘shoehorns’ to guide the pressure header over the top of the liner and prevent damage to it. In addition, the plates will assist in centering the core within the jacket.

Abstract: A mold is configured to form a gel monolith including a first gel portion and a second gel portion. The mold includes a base including a first hydrophobic surface. The mold further includes a tubular outer wall including a second hydrophobic surface, and the outer wall is coupled to the base. The mold further includes a removable tubular insert including an inner surface and an outer hydrophobic surface. The insert is removably coupled to the base.

Abstract: The invention relates to a device and a method for producing a blade (13; 14) comprising two outer walls (17, 18) and at least one cavity (24; 25; 26; 27) between said outer walls (17, 18), for a turbine (10), using an outer mould (30) and several cores (34, 35) for forming the outer walls (17, 18) and the at least one cavity (24; 25; 26; 27) of the blade (13, 14). At least one of the cavities (26; 27) is divided into two channels (26a, 26b; 27a, 27b) by a middle segment (28). One channel (26a; 27a) is located between the first outer wall (17) and the middle segment (28), while the other channel (26b; 27b) is located between the middle segment (28) and the second outer wall (18). Two cores (34, 35) which are separate from each other are used accordingly. This provides a simple and economical means of reducing the thickness (d) of the outer walls (17, 18).

Abstract: An apparatus for making a lightweight, thin wall, seamless, hollow structural profile using a simple mold. The apparatus includes a base for supporting a mandril and a two piece outer form which bolts together assembled. A mixture is poured or injected into the space between the mandril and the form to produce a profile upon hardening of the mixture of either cement, fiberglass or polymers. The hollow area of the structural profile may be filled with various materials. The base comprises a plurality of upwardly rising columns or blocks and posts around the inside perimeter of the mandril and blocks around the outside perimeter of the form for proper positioning of the mandril and the form, which are separated by a predetermined distance in accordance with the desired features and dimensions of the structural profile.

Abstract: A plastic liner for protecting concrete manhole interior surfaces from corrosion wherein the liner includes provisions for creating a strong mechanical lock between the liner and the interior surfaces. A side of the liner which includes the provisions has a plurality of raised hollow projections with spaced sections. The mechanical lock is created when concrete is poured against the side of the liner with the projections. The concrete at least partially enters the hollow portions and fills spaces between the projection sections. The projections also intersect to enhance the mechanical lock by preventing bulging. Liner sections cover essentially all of the manhole interior surfaces. Forming a liner section by rotationally molding the plastic and cutting gaps into the projections is also disclosed.

Abstract: A method for assembly and disassembly of formwork for walls (1) of poured material raised above a reference surface (2) using boards (3) each including a shuttering face (4) and equipped with wheels (31, 32) at their base. Assembly includes from an unshuttered position, rocking toward the wall (1) to be shuttered of at least the base (29) of the shuttering face (4) of the board (3) by rotating about an axis defined substantially by the support points (10) of the wheels (31) on the reference surface until the lower edge (35) of the shuttering face (4) is made to rest on the reference surface (2). The rocking is continued toward the wall (1) to be shuttered of at least the base (29) of the shuttering face of the board (3) by rotating about an axis substantially defined by the lower edge (35) of the shuttering face of the board (3) until the wheels (31) are raised from the reference surface. For disassembly, the rocking about the two axes is performed in reverse.

Abstract: A lightweight metal or plastic form that when collapsed can be installed on the inside of a temporarily suspended manhole casting and expanded by a mechanism having numerous arms connected at a center point and extending outwardly to spaced and positioned spring encasing brackets that compensate and adjust slightly the pressure that the arms project to the outer walls of a slotted circular shaped form. By a cam effect the handle locks into a over center position that is maintained without the aid of clamps or additional hardware so that the form will stay in position until the user lifts the handle upwardly which removes the device from the manhole and at the same time collapses the form. The inventions primary purpose is to provide a seal between a temporarily blocked up manhole metal casting and the manhole precast concrete riser rings so that cement may be applied around the outside of the manhole and vibrated into position without danger of any cement contaminating or plugging the sewer system.

Abstract: An apparatus for the production of a symmetrical oval concrete pipe including an oval male joint member and an oval female joint member formed on opposite ends of an oval pipe body having a form including an outer jacket and an inner core disposed in spaced relationship relative to each other to form the oval pipe body therebetween; an upper pallet and a lower pallet configured to form the oval male joint member and the oval female joint member respectively, and a pallet positioning structure configured to engage the upper pallet and the lower pallet to operatively position the upper pallet and lower pallet relative to the outer jacket and inner core such that corresponding points on the upper pallet and the lower pallet are aligned relative to each other whereby corresponding points of the oval male joint member and the female joint member are aligned relative to each other.

Abstract: Apparatus for forming inverts in a manhole base comprising at least one adjustably positionable channel-forming member for forming an invert which communicates between associated sidewall openings of a manhole base. Flexible members join the ends of the invert form. The adjustability of the channel-forming assembly extends over a range of angles which are both greater than and less than 180 degrees.

Abstract: A method of making a molded plastic component of an internal combustion engine. The method is for making a fuel rail and includes constructing particular core pins of the mold with threaded connections that form seals between them when they are disposed in proper position within the mold cavity for the molding of a fuel rail. The core pins serve to form a main fuel passage and auxiliary fuel passages which transversely intersect the main fuel passage. Each core pin that forms an auxiliary fuel passage includes a screw thread on its inner end that threads into a corresponding complementary threaded recess in the side of the core pin that forms the main fuel passage to create a corresponding seal. This sealing prevents any significant flash from forming in the fuel rail at the intersection of each auxiliary fuel passage with the main fuel passage. After the plastic has been molded, the core pins are unthreaded and withdrawn.

Abstract: A method of and means for manufacturing an article, such as a toothpaste tube having a captive cap, by injection moulding. An elongated core (2) is projected into the hollow of a die (1) to engage an aligning surface (5) on the core (2) with a mating aligning surface (6) on the die (1) at commencement of the injection moulding cycle. Then during continuation of the moulding cycle disengaging the aligning surfaces are disengaged to form a membrane (33) between the disengaged surfaces.

Abstract: A structural component having a curved wall, such as an aircraft fuselage pipe, has a grid structure formed of box frames produced by winding tapes of fiber reinforced synthetic material, so-called prepregs, onto mold bodies. These mold bodies are then assembled on a mandrel for covering with a planking and curing whereby the tapes are bonded together to form stringers intersecting with ribs in a grid structure and whereby the planking is bonded to the grid structure. The ribs are reinforced by fiber reinforced belt segments of synthetic material inserted into gaps between adjacent short ends of the mold bodies, whereby these belt segments are bonded to the ribs during curing. The belt segments ave a width corresponding to a multiple of the width of the stringers and hence protrude radially inwardly. Preferably, an edge reinforcing strip of fiber reinforced material is arranged alongside the radially inner edge of the belt segments.

Abstract: Apparatus for forming inverts in a manhole base using a single pour or double pour technique. In the single pour technique, the invert is formed simultaneously with the formation of the manhole base using a mold member having a channel-shaped projection defining the invert. Alignment members simply, and precisely, align the mold member having the channel-shaped projection with the members forming the base member sidewall openings to form a manhole base having an invert in precise alignment with associated sidewall openings. In the two pour technique, the manhole base is initially formed. Thereafter, channel invert forms are aligned with sidewall openings by alignment members arranged within the manhole openings to assure precise alignment therebetween, wherein the invert formed within the manhole base by pouring the casting material into the base member forms an invert which is in precise alignment with associated sidewall openings.

Abstract: A molding apparatus for molding in place walls of a structure on a poured concrete floor or other base is provided with a central support member to which are movably attached four flat wall molds and four corner molds which cooperate with adjacent like apparatus and also with conventional exterior molds in forming a cast structure; the apparatus has actuating members for effecting retraction firstly of the flat wall molds and then of the corner molds toward the central support member upon completion of a casting operation and after hardening of the cast materials; the flat wall and corner molds are connected to the central support member by means of a plurality of lost motion connectors in such a manner that the aforementioned retraction is accomplished, after disengagement of locking devices, first by the flat wall molds and then, after a selected delay, by the corner molds; then, while in this position, the apparatus is removed and transported to another location where it will be set in its place in an expa

Abstract: Concentric inner and outer molds define the walls of the manhole base to be cast. The top of the inner mold is provided with a stationary invert forming section and at least one swingable invert forming section swingably mounted upon a centrally located pivot pin. The invert forming mold member is provided with locating openings adapted to receive the pin within the swingable invert forming section to positively and accurately locate the swingable invert forming section. The open region between the fixed and movable sections is filled with a "knee" member in the form of a hollow curved shell which defines the central portion of the invert. The top of the inner mold may alternatively be provided with two or more swingably mounted invert forming sections.

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 core holding structure for molds and method of making same. A hollow bushing is locked within a mold so positioned with respect to a cavity in the mold that a rod-like core may be mounted on the bushing to provide a bore for hollow members such as spouts used in the continuous casting of metals. The bushing effects proper spacing of the core from the walls of the mold so that the wall thickness of the finished article is controlled. The mold may be made from a single member or it may be made from a multiple piece mold. Special knock out plate members are used in connection with the one-piece molds to extend the life thereof.

Abstract: Apparatus for casting concrete septic tanks, burial vaults and the like includes an inner form and an outer form. The inner form includes apparatus for positively locking the cover plate to the inner form as the walls thereof are expanded. The inner form, also, includes an improved mode for expanding same.

Abstract: In the manufacture of hollow turbine blades or vanes especially those having a columnar crystalline growth in the alloy, the blade is cast in two opposed halves against a central mold element, the latter being rigid enough to avoid deformation during heating of the mold prior to pouring and during solidification. This central element has on opposite surfaces the configurations of the inner surfaces of the hollow blade. Cooperating with this inner element are outer elements having cooperating inner surface configurations of the convex and concave sides of the blade respectively. After the blade halves are cast simultaneously in the assembled mold and removed therefrom they are bonded together to form a complete blade.

Abstract: A forming device for prefabricating structures having a size-adjustable core surrounded by a shell structure displaceable with respect to the core. The shell structure is constructed of a plurality of frame members each independently adjustable with respect to the core. One or more tensioning cables surround the core, the cables being reeved through a series of fixed and movable pulleys mounted at each corner of the shell formed by the intersecting frame members. By operating the cables the frame members are adjustable with respect to the position of the core of the forming device.