Abstract: An injection molding method in which a molding material is injected into a cavity formed in a mold to be molded. The mold is driven to resonate so that resonance occurs in the mold at n wavelengths, where n=m/2 and m is a positive integer, and an injection molding apparatus provided with a fixed mold and a movable mold; the movable mold having a cavity in one side thereof, and an ultrasonic vibration feed device being connected to the other side thereof.

Abstract: An instant-release type concrete molding machine manufactures a concrete product by interposing unitable attachment devices between a press die and a press, placing an attachment unit of a pattern frame within a molding region, introducing the pattern frame and the press die into the molding region in alignment with the press, moving the press and the press die toward each other and uniting them by the aforementioned attachment devices, and fixing the pattern frame by the attachment unit within the molding region.

Abstract: An inorganic powder is vibrated while being calcined. The vibrations suspend the powder as in a conventional gas-fluidized system, without clumping, but without loss of fines. As applied to superconductor precursor powders, the treatment accelerates growth of the superconducting phase. The invention includes a novel furnace system for simultaneously heating and vibrating the powders.

Abstract: The fracture-free paving block (1) comprises a cement block substrate (1-1) and a top solid layer (1-2), and is characterized in that the top layer is selected from a cured cement mortar layer and a tile-like layer firmly bonded to the substrate with cement mortar; the top layer is bonded to the block substrate with lateral margins (2) of 1 to 8 mm wide in horizontal distance (1.sub.5) from the peripheral edges of the substrate: and the vertical distance (1.sub.6) from the surface of the top layer to the peripheral edge of the substrate is 5 to 50 mm. The method for producing the paving block (1) having a tile-like top layer comprises applying adhesive cement mortar between the back of the top layer (1-2) and the upper surface of the substrate (1-1); placing the top layer on the substrate with the above-mentioned margins (2) of the substrate surface: and applying vibration and/or pressurization between the top layer and the substrate.

Abstract: A method of manufacturing lightweight shapes from polyimide foam in which density discontinuities such as cavities, varying cell size, or swirl marks are substantially eliminated. A block or bun of polyimide foam is prepared in a conventional manner which results in a high density rind and other discontinuities. The foam is chopped into fine flakes in a chopper with a continuous flow of air to prevent electrostatic attachment of the flakes to the chopper and ducting. The flakes are mixed with a quantity of polyimide precursor and then heated to cause the precursor to bond the flakes into a uniform mass having highly uniform and predictable density. This is a very economical process since portions of the original bun may be used which would ordinarily be discarded. An alternative method is described whereby the flakes can be bonded together by using the precursor in the form of a partially cured foam either as a binder, or by making the flakes of partially cured foam.

Abstract: A method of manufacturing lightweight shapes from polyimide foam in which density discontinuities such as cavities, varying cell size, or swirl marks are substantially eliminated. A block or bun of polyimide foam is prepared in a conventional manner which results in a high density rind and other discontinuities. The foam is chopped into fine flakes in a chopper with a continuous flow of air to prevent electrostatic attachment of the flakes to the chopper and ducting. The flakes are mixed with a quantity of polyimide precursor and then heated to cause the precursor to bond the flakes into a uniform mass having highly uniform and predictable density. This is a very economical process since portions of the original bun may be used which would ordinarily be discarded. An alternative method is described whereby the flakes can be bonded together by using the precursor in the form of a partially cured foam either as a binder, or by making the flakes of partially cured foam.

Abstract: It is disclosed a method for preparing a large-sized powder metallurgical sintered product having a superior characteristic by charging mixtures of three types of metallic powder composed of coarse particles, middle particles and fine particles into the molding die while vibrating it, heating the charged material together with the molding die, sintering them, and infiltrating metal of low melting point into the sintered body. According to this method, it is possible to get a large-sized sintered body having a superior strength and surface smoothness or a sintered body prohibiting any cracks or slits by arranging the proper particle size.

Abstract: Concrete elements, such as blocks or bricks, are molded or cast by forming in a primary mold cavity a secondary mold made of a portion of a thermoplastic film which has been contacted with a flat heater surface to assure a uniformly heated film portion which is then sucked into the primary mold cavity without wrinkles and filled with concrete mix. The secondary mold with the concrete mix in it is withdrawn, for example, sucked out of the primary mold cavity well before any effective hardening of the concrete mix, so that curing and hardening takes place in the secondary mold outside the primary mold cavity. This early withdrawing is important because it avoids expansion of the curing mix in the primary mold, whereby removal from the primary mold is facilitated. Additionally, the early removal with the aid of the secondary mold assures a more efficient use of the primary molds which are used again while the hardening is still going on in the secondary mold.

Abstract: A process for making a substantially even thickness fascia part. The fascia part is prepared by placement of a plastic powdered material into an enclosed mold, heating and agitating the mold for distributing the plastic powder on the mold surfaces to provide a substantially even thickness fascia part on the molding surface. The mold includes first mold surfaces for defining critical portions of the mold which correspond to the desired portions of the mold for forming the finished shape of the part by melting of the plastic powder to a uniform film along the surface. The mold also includes second mold surfaces defining non-critical portions of the mold where it is undesirable for plastic filming to occur.

Abstract: The method of molding a ceramic product by forming a mixture of ceramic fibers with lengths less than one-fourth inch, water and a deflouculent, the mixture having a consistency which will not flow, placing the mixture in a water-absorbing mold, vibrating the mold to cause the mixture to flow into contact with the mold and eliminate voids in the mixture, allowing a portion of the water of the mixture to be absorbed by the mold leaving a hardened remnant in the mold, removing the hardened remnant from the mold, and heating the hardened remnant to sinter the fibers therein to each other. In one example, granular alumina is mixed with the mass of fibers, water and the deflouculent to form the mixture.

Abstract: A method of making thermal insulating products comprising porous, lightweight, high temperature resistant inorganic particles in a polyimide foam matrix and the product thereof. A polyimide precursor powdered is mixed with about equal weight of flake-like porous inorganic particles to substantially uniformly coat the particles with powder. The mixture is placed in a mold and compressed slightly. The assembly is heated to the foaming temperature of the polyimide precursor for a period suitable to produce uniform foaming. Then the temperature is raised to the curing and crosslinking temperature of the precursor for a time period sufficient to produce complete cure. A high temperature and flame resistant, light weight, highly insulating product results. If desired, protective sheets of material may be bonded to selected product surfaces during or after the molding operation.

Abstract: A method of manufacturing lightweight shapes from polyimide foam in which density discontinuities such as cavities, varying cell size, or swirl marks are substantially eliminated. A block or bun of polyimide foam is prepared in a conventional manner which results in a high density rind and other discontinuities. The foam is chopped into fine flakes in a chopper with a continuous flow of air to prevent electrostatic attachment of the flakes to the chopper and ducting. The flakes are mixed with a quantity of polyimide precursor and then heated to cause the precursor to bond the flakes into a uniform mass having highly uniform and predictable density. This is a very economical process since portions of the original bun may be used which would ordinarily be discarded. An alternative method is described whereby the flakes can be bonded together by using the precursor in the form of a partially cured foam either as a binder, or by making the flakes of partially cured foam.

Abstract: A method of making a concrete block having decorative stones embedded in a surface thereof includes the steps of placing on a face plate a layer of stones which includes a plurality of spaced decorative surface stones and includes filler stones substantially smaller than the surface stones and disposed in the spaces between the surface stones, applying a cement mortar on the surface stones and filler stones, introducing concrete into a separate mold, inverting the face plate and placing it on top of the concrete in the mold, consolidating the concrete and assembling the concrete and the sruface stones by applying pressure and vibration, removing the mold and the face plate, and curing the resulting block without the mold.

Abstract: A process for the production of a multi-layer block by distribution of a mixture, the block being used for the production of agglomerated slabs of marble, granite, sand or in general stone, consists of weighing a predetermined amount of the mixture, mixing it to render it homogeneous, conveying the predetermined amount of homogeneous mixture into a mold provided with a vertically movable bottom, subjecting the mixture to a vibrating action by means of a vibrating plate, then lowering said predetermined amount of the mixture of a distance equal to the thickness of a new slab, covering the mixture with a sheet of impermeable material, repeating the operations until the mold is filled. A multi-layer block is formed, which is compacted and allowed to set. The block is separated into slabs corresponding to the sheets of impermeable material. The apparatus is also described.

Abstract: A method and apparatus for the production of a synthetic resin skin uses a mold for forming at least two separate skin sections which are then joined prior or after a final heat treatment. The synthetic resin skin sections are produced in at least two separate mold members, and the skin sections are then caused to contact each other along determined faces or margins which are joined under light pressure. Any so-called selvage is easily removed after the joining which intimately bonds the skin sections to each other due to the curing of the synthetic resin.

Abstract: A method of making thermal insulating products comprising porous, lightweight, high temperature resistant inorganic particles in a polyimide foam matrix and the product thereof. A polyimide precursor provided is mixed with about equal weight of flake-like porous inorganic particles to substantially uniformly coat the particles with powder. The mixture is placed in a mold and compressed slightly. The assembly is heated to the foaming temperature of the polyimide precursor for a period suitable to produce uniform foaming. Then the temperature is raised to the curing and crosslinking temperature of the precursor for a time period sufficient to produce complete cure. A high temperature and flame resistant, light weight, highly insulating product results. If desired, protective sheets of material may be bonded to selected product surfaces during or after the molding operation.

Abstract: A method for fabricating concrete structural elements is shown. According to the method, a structural element, such as a sheet of insulating material reinforced with concrete, is vertically oriented and coated with fresh concrete sprayed by a shotcrete gun. This coating is then smoothed and shaped as required by the given application. The method does not require the use of moulds to cast the structural element, whose surface is therefore visible at all times during the course of manufacture. This allows for the repair of imperfections before the concrete has hardened.

Abstract: The disclosure relates to a turbine disk and a method of making the turbine disk comprising the steps of rotating a mold, adding a first powdered metal to the rotating mold at a first rate, reducing the rate of addition of the first metal to a second rate, and adding a second powdered metal to the mold at a third rate substantially equal to the difference between the first and second rates.

Abstract: A storage vault includes an inner tank entombed within a concrete outer tank by first erecting a pair of sidewall forms on a base plate to create an open-top enclosure. The wall forms are securely clamped together. A layer of concrete is then poured onto the base plate and the inner tank is lowered onto the layer of concrete. Concrete is poured into the enclosure to entomb the inner tank while the bottom layer of concrete is still wet. The inner tank is restrained by a pair of reinforced hold-down bars extending over the top of the enclosure and having a pair of downwardly extending hold-down tubes which contact the top of the inner tank. A back hold-down bar is forced downwardly by a chain which passes over the hold-down bar and is fastened to the base plate. After the concrete has set sufficiently, the hold-down bars and tubes are removed and the holes created by the hold-down tubes are filled with concrete.

Abstract: A method for the manufacture of cored construction products from dry particulate materials including feeding the materials into a vibrating mould so as to bring the same into pre-compacted condition, and subjecting the materials when in such condition to a transverse pressure so as to effect final compaction thereof. After compaction, a free standing surface of the material is impregnated with a setting liquid. The vibration is of such frequency and amplitude as to bring the individual particles into substantially uniform closely spaced disposition, the subsequent application of pressure bringing the material into a compacted state without any substantial re-arrangement or crushing of the particles.

Abstract: An improved method for moving a large, heavy, fragile, freshly-made concrete pipe section, with top and bottom pallets but without jacket protection, out of a casting machine, and directly into a kiln, for curing; moving the cured pipe section from the kiln to an unloading station, automatically removing the top pallet, removing the pipe section from the bottom pallet, cleaning the top pallet and then placing the top pallet on a reinforcing cage that has been set on the bottom pallet, ready for the next cycle. The cycle is continuously intermittant.

Abstract: Liposomes containing phosphatidylethanolamine, palmitoyl homocysteine or oleic acid or palmitic acid, fuse rapidly when the pH of the medium is reduced below 7. Liposome fusion was measured by (a) mixing of the liposomal lipids as shown by resonance energy transfer, (b) gel filtration and (c) electron microscopy. The presence of phosphatidylethanolamine or acid addition esters thereof in the liposomes greatly enhances fusion; whereas the presence of phosphatidylcholine inhibits fusion. During fusion of liposomes containing phosphatidylethanolamine:palmitoyl homocysteine (8:2), almost all of the encapsulate calcein is released. Inclusion of cholesterol (40%) in the liposomes substantially decreases leakage without impairing fusion. Those pH sensitive liposomes are fused to deliver biologically active molecules such as DNA, into living cells.

Abstract: A mass is cooled systematically under the influence of an electrical or mechanical alternating field to obtain a quasi dielectric isotropic structure of a synthetic resin part.

Abstract: A method and an apparatus for casting concrete elements from a concrete mix by slipforming molding which involves extruding the concrete mix onto a bed, generating pressure into the concrete mix by a first set of extruder members and by compacting the concrete by moving at least one of the movable mold walls in a direction approximately parallel to its plane. The concrete mix is tamped into a more compacted form by protrusions formed onto at least one of the movable mold walls and projecting into the mix. The method and the apparatus achieves a high degree of compaction in the concrete mix by an uncomplicated method and apparatus without generating a loud noise.

Abstract: A process for producing a hollow plastics article, which comprises introducing a polymerizable composition in the hot state into a sealed hot mould, immediately setting the mould in motion by imparting to it a second movement of rotation about a second axis and a third movement of oscillation about a third axis which is perpendicular to the second, so that the composition is applied to the inner walls of the mould, and polymerizing it herein to form a hollow article. The improvement comprises setting the mould in motion by further imparting to it, simultaneously to the second and third movement, a first horizontal movement which has, in a horizontal plane, two components in two directions perpendicular to each other.

Abstract: A process for making beams of prestressed concrete in an assembly for casting and curing beams of prestressed reinforced concrete, having an individual prestress frame allowing tensioning of longitudinal reinforcements between two fixed end elements maintained in spaced-apart relationship by longitudinal elements; and an individual impression cooperating hermetically with the frame so that the walls of the impression and the walls of the end elements of the frame, connected together, form the sides of a mould receiving the cast concrete, the impression being adapted to be separated from the frame without detensioning of the reinforcements.

Abstract: Disclosed is an improved packerhead or drycast concrete product forming apparatus and method for making a concrete product therewith. The apparatus typically includes a mold having a lower curing pallet, a platform for supporting said mold at the pallet, and a vibrator table having a vibrator ring for association with said curing pallet. The improved apparatus of the present invention preferably comprises a vibrator ring having selectively engageable (and disengageable) means to rigidly connect the vibrator ring to the curing pallet when said vibration means is activated. The preferred vibrator ring selectively engageable means comprises electromagnet means and the preferred product of the process comprises concrete pipe.

Abstract: A method for compacting a concrete mix in a casting mold into which the concrete mix is poured between at least two opposite and approximately parallel mold walls. The opposite mold walls are moved in a push-pull manner and essentially on the plane of the walls so that the concrete mix is subjected by the frictional action from the mold walls to an internal compacting shear produced by contradirectional movement of the opposite mold walls.

Abstract: A method for centrifugally casting a rectangular access floor panel includes the steps of forming a metal pan having a planar bottom, peripheral sidewalls and a plurality of upstanding tabs, inserting the metal pan into a cavity defined by a two-part mold and filling the pan within the mold with a concrete mixture. The mold is rotated about a vertical axis and vibrated to evenly distribute the concrete mixture within the pan. A smooth magnetic sheet is placed within the cavity. The sheet engages the planar bottom of the metal pan and prevents seepage of the concrete mixture through openings in the bottom of the pan during casting. The apparatus includes a turntable, a drive for rotating the turntable and a mold clamped to the turntable. The mold is vibrated during rotation to insure a void-free distribution of the mixture throughout the pan.

Abstract: The invention relates to a ceramic molding which is manufactured from high-temperature resistant, fire-resistant or refractory fibers and fine-grain, fire-resistant or refractory materials and, in certain cases, from other customary additives. The ceramic molding is characterized by the fact that its porosity gradually and continuously increases along an axis of the molding from less than 20% to more than 70%. The areas with low porosity comprise the fine-grain, fire-resistant or refractory materials. The areas of high porosity comprise ceramic fiber, such as, fibers of Al.sub.2 O.sub.3, SiO.sub.2, ZrO.sub.2, C, SiC or mixtures thereof. The intermediate areas are constructed of mixtures of ceramic fiber and fire-resistant or refractory materials. The invention also relates to the use of such a ceramic molding method for the manufacture of compound moldings saturated or infiltrated with organic resins, pitch, tar, metals, metal alloys or glasses.

Abstract: The process, conducted completely under vacuum, provides that a material of any kind (marble, stone or material of other nature) of variable particle size is introduced, together with a binder (organic or inorganic) into a mixer (2) and then, after having achieved the complete homogeneity of the mixture, is discharged in a convenient manner into a mouldbox (1) which is then transferred to the interior of a press (6) where the beam (8), provided with vibrators (10), subjects it to a combined action of pressure and vibration of the mass which the mixture in volume to result in blocks suitable to be cut into slabs or into blocks of lesser dimensions according to need.

Abstract: A process is provided for the manufacturing of machine parts wherein a concrete polymer including a filler mixture formed of rock particles and a binding agent matrix is employed. It is provided that as the fine part of the filler mixture, particles are used that are made of mechanically resistant materials having a modulus of elasticity that is higher than the rock. It is also provided that essentially cubic broken rock particles are used and that the mixture of rock and fine particles and the binding agent system is condensed in a casting mold in such a way that as many of the adjacent particles as possible contact one another.

Abstract: In a process wherein parts are pressed into a predetermined shape by filling a die cavity with a powder material, compressing the powder under pressure to form a compressed part of said shape, an improvement to that process comprises subjecting a portion of the cavity to vibrations during the filling of the die cavity.

Abstract: A method and apparatus for solidifying a powdered cosmetic composition in a vertically held elongated hollow container to form a stick-shaped powdered cosmetic. A dispersion of the powdered cosmetic composition in a liquid phase is filled in the container. Pneumatic pressure is applied to the upper surface of the dispersion, and at the same time, the liquid phase contained in the dispersion is removed from below a screen placed at the lower end of the container.

Abstract: The invention is a flexible mask for use in charging a flowable material into selected cells of a honeycomb structure and is of particular utility in chraging a sealing material into the ends of selected cells of such a structure during fabrication of solid particulate filter bodies and other selectively plugged honeycomb structures. The mask has a central body with a set of openings extending therethrough which allow passage of the flowable material through to the selected cells and a second set of protrusions extending from one of the surfaces of the mask which are used to align the mask to the end face of the structure and which extend into and sealably cover the cells which are not to receive the flowable material. The mask may be formed from a polymer, preferably an elastomer, using any of three disclosed die apparatuses.

Abstract: A process of producing ICMUs (insulated concrete masonry units) having an inner load-bearing portion and one or two outer insulating portions are disclosed. Disregarding the insulation cores, heat flows from the outer side wall or walls to the inner portion through outer end walls and, in some embodiments, webs. These outer side walls and webs are heat bridges and are thinner and of significantly lower density than the other walls of the ICMU, thereby providing improved thermal insulation.Also disclosed are ICMUs with a vertical or horizontal recess in one outer insulating portion. Electrical conduit and/or plumbing can be placed into these recesses. In addition, corner ICMUs are disclosed which provide increased structural strength when used to construct a 90.degree. corner between two structural walls because of a special mid-wall in the corner ICMU.

Abstract: Method and device for the casting of concrete products either by means of a periodic method or by means of a continuous slide casting method. Into the product, one or several cavities are formed by means of a cavity mandrel (4). The mix is compacted by rotating the cavity mandrel (4) back and forth around its longitudinal axis.

Abstract: The conventional process for forming a simulated ornamental stone is improved by using alumina trihydrate as a filler for a polyester or the like resin with catalyzer for depth-simulation, the same being applied as a substantially integral translucent layer of variegated depth substantially coextensive with the superficial veining surface of the product and being backed by a solidly colored material which may include a solidly colored gel coat between the depth-simulating material and back-up matrix material.

Abstract: A molding machine is disclosed which includes a vibration zone; an endless conveyor movable across the vibration zone and having tread plates pivotally connected in succession. The molds are provided on the tread plates and include bottom wall pallets each freely supported by one of the tread plates. Upward vibration is applied to the bottom wall pallets independently of the tread plates as the conveyor moves across the vibration zone.

Abstract: A method of vibrating mass material in moulds or forms is described, there being used a vibrator attached to the mould, for such as the vibration of refractory masses for lining metallurgical vessels or the vibration of concrete in forms. The invention is distinguished in that vibration takes place continuously during movement of the vibrator on the mould in time with the mould being filled with mass material. The vibrator, which is attached to a plate having a built-in magnet, preferably an electromagnet, is attached to the mould and moved on it with the aid of a device acting on the vibrator itself, the device being controlled by a driven member, e.g. a screw, a power ram or the like.

Abstract: A thin-walled work piece of plastics material is cast in a mold by pouring or flowing the plastics material in the form of a plastisol or a flowable powder into a preheated casting mold which is locked to a casting container in a sealed manner to form a closed casting cavity. The mold and the container are then lifted or rotated through at least 180.degree.. A reduced pressure is maintained in the cavity at least prior and during the tilting. After a predetermined time the reduced pressure is removed and the mold and container are tilted back into the starting position. The mold and container are then separated again and the mold is then heated for completion of the jelling or curing whereupon the mold is cooled for removing the work piece from the mold.

Abstract: The present invention relates to a method of forming the primary core of a concrete pipe. A steel cylinder is disposed vertically on the base of the pipe forming machine. A conventional rotary packerhead having a diameter less than the inner diameter of the steel cylinder is lowered concentrically to the bottom thereof. Concrete is then introduced within the steel cylinder through the upper end thereof. The packerhead is rotated to force the concrete into the annular gap between the packerhead and the steel cylinder. As the primary core is formed, the packerhead is raised and rotated while concrete is introduced within the steel cylinder, thereby forming a primary core consisting of a steel cylinder having an inner lining of concrete. In an alternative embodiment, the steel cylinder is completely embedded within the concrete.

Abstract: A method for adjusting the tolerances, regarding shape and dimensions, of an elongated vibrated concrete article made in a mould after removing the article from the mould. The invention makes it possible to achieve close tolerances inspite of using a rather wet concrete composition, which is optimized as regards strength but which causes adhering and suction in the mould and alteration of the articles shape before hardening. According to the invention, the method is characterized in that the article, before hardening, is brought into engagement with one long side a straight-edge rule for being shaped thereby, in that the article on the end surfaces is pressed to a predetermined length, and in that the cross sectional shape of the article is adjusted into agreement with the desired shape while keeping the article in engagement with the rule and pressing it on the end surfaces.

Abstract: New molded products and methods of manufacturing the same are described. More particularly, the molded products comprise thermoset resins and intimately dispersed inorganic solid particles, and the method comprises in its broadest sense, preheating a thermosetting organic resin and a catalyst for the resin to a temperature sufficient to reduce the viscosity of the resin and catalyst to that of a very fluid liquid, and also preheating discrete inorganic solid particulates prior to mixing of the particulates with the fluid resin-catalyst mixture. Such regulated preheating of the resin, catalyst and particulates results in improved wetting of the particulates with the resin-catalyst mixture and in the release of air bubbles during the mixing operation thereby resulting in molded products having improved properties, particularly products wherein the resin is in relatively unstressed and unflawed condition.

Abstract: Manufacturing lined concrete pipe in a reduced time, and provision of such pipe with reduced tendencies to rusting and liner separation, are achieved by a cartridge assembly (22) movable to and away from the pipe machine, a work stand assembly (23) for positioning the cartridge to receive a liner, liner tensioning structures (68) and liner to cartridge clamps (87) for moving the liner to the cartridge, tightening the liner, and holding the liner during transport by the cartridge, and tension bars (96) controlling wire tension during pipe formation. Concurrently with operation of the standard pipe machine, the work stand operates to place a liner on the cartridge. During the stripping cycle of the pipe machine, the cartridge delivers the liner to the core. During the pipe machine vibration under pressure cycle, the tension on the liner tension wires is relieved.

Abstract: The invention is concerned with a method for continuous slide-casting of large-size concrete objects or corresponding elements for compacting high-viscosity casting mix. The slide-casting mould (33) comprises a bottom plane (34), side walls (38, 39) of the mould, as well as means (37) for pressurizing the casting mix mechanically. According to the invention, before the parallel side walls (44, 54) at the outlet end of the slide-casting mould (33), within the casting line concerned, walls or wall portions (40 to 43, 50 to 53) are provided as fitted to each other or to their corresponding portions, provided as pairs, as pivotable always in the same direction around substantially vertical shafts (45 to 49, 55 to 59) included in their planes. The moving parts of the side walls (38, 39) may be displaced in pairs in the lateral direction, relative the casting direction, e.g., by means of cylinder-piston devices (61 to 63).

Abstract: Method for the continuous slide-casting of concrete objects for compacting the high-consistency concrete mix. Repeated parallel displacements back and forth are produced in the various regional zones in the high-consistency concrete mix placed in the mould by pivoting at least two opposite walls (10) of the slide-casting mould structure in the same direction relative parallel shafts (12) substantially parallel to each other and as synchronized relative each other, back and forth. Additional walls (4) fitted into the mould and forming oblong cavities, recesses or ribs in the concrete objects are pivoted in pairs with each other in the same direction and as synchronized with each other around shafts (7) placed at the ends of the additional walls next to the outlet end of the mould, the said shafts being substantially parallel to each other.

Abstract: A method of preparing an elastically deformable magnetic object in which fine metal particles treated with a settable organic substance are mixed with a rubber material in a pulverized form to make a powdery mass. This is shaped under pressure, in a magnetic field into a compacted body and heated followed by cooling to allow the powder particles of rubber materials to bond to the magnetic particles and join them together to yield a homogeneous elastically deformable metal object with the magnetic particles uniformly distributed therein.

Abstract: Methods and apparatus for vulcanizing rubber and like material (10). Ultrasonic energy at about 10 to 100 kilohertz is applied to the material (10) at an energy intensity sufficient to generate heat to a temperature in the range of about 200 to 300 degrees Fahrenheit, while a static pressure is applied on the material (10) sufficient to prevent substantial cavitation and material degradation. The application of the ultrasonic energy and the pressure is maintained for at least about 10 minutes for each 1/8 inch in thickness of the material (10).

Abstract: The present invention relates to a method of forming the primary core of a concrete pipe. A steel cylinder is disposed vertically on the base of the pipe forming machine. A conventional rotary packerhead having a diameter less than the inner diameter of the steel cylinder is lowered concentrically to the bottom thereof. Concrete is then introduced within the steel cylinder through the upper end thereof. The packerhead is rotated to force the concrete into the annular gap between the packerhead and the steel cylinder. As the primary core is formed, the packerhead is raised and rotated while concrete is introduced within the steel cylinder, thereby forming a primary core consisting of a steel cylinder having an inner lining of concrete. In an alternative embodiment, the steel cylinder is completely embedded within the concrete.