Abstract: Extrusion of a mixture of vegetable bits with a binder, particularly wood chips with a weather-resistant binder, involves precompressing in a compression chamber of an extrusion press the mixture by a compression stroke transverse to the extrusion axis, the compression stroke being delivered by at least one precompression piston. Prior to the precompression elongated bits of the mixture are acted on by an orienting influence so that the elongated bits are deposited substantially parallel to the extrusion axis. The outer layers of the mixture are compressed with a reduced precompression ratio so that the bits oriented prior to precompression remain fixed in position during the subsequent extrusion stroke.

Abstract: A belt-type press for making particleboard has a longitudinal row of transverse frames through which pass upper and lower longitudinally extending press beams extending along and carried on the row of frames flanking respective heated press platens in turn flanking stretches of respective upper and lower belts driven to move a mat of particles to be pressed along the path in a transport direction. The upper beam is pressed down by a plurality of substantially identical hydraulic actuators to compress the mat between the belts with a relatively high pressure in an upstream compression region of the press and with a relatively low pressure in a downstream compression region of the press. The upper platen and beam have a downstream calibration portion and an upstream compression portion, the latter being elastically deflectable upward relative.

Abstract: A powder-metallurgy method for producing tubular product having at least one surface and preferably an internal surface thereof clad with an alloy different from and preferably more resistant to destructive media than the material from which the remainder of the tubing is constructed. An assembly is constructed of a metal tubing having an internal surface to be clad and a tubular insert mounted generally axially within the tubing in spaced-apart relation to the internal surface thereof, which provides a generally annular cavity between the internal surface of the tubing and the tubular insert. This cavity is filled with metal particles of a composition to be clad on the tubing internal surface. The cavity is sealed and the assembly is heated to an elevated temperature at which it is forged to compact the metal particles introduced to the cavity to substantially full density and metallurgically bond the particles to the internal surface of the tubing to provide a desired destructive-media resistant cladding.

Abstract: A method of making panels of composite wood material in a wet process includes depositing a layer of wet composite wood material in a mat on a press wire screen mesh and moving the screen mesh to carry the mat into a pressing position between a pair of spaced apart pressure plates having generally matching, contoured facing surfaces for shaping the outer face and a smoothly contoured back face of the panel. The pressure plates are moved toward one another compressing the mat of wet material and biasing the supporting screen mesh to conform generally to the contour of one of the pressure plates. After a suitable time interval for molding, the pressure plates are moved apart and the press wire screen mesh is rewound on a roll to aid in separating the completed panel from the mesh. The finished panel is carried by the screen mesh away from the pressure plates for unloading as the screen is rolled up and the deformations formed in the screen during molding are flattened out as the screen is rewound on the roll.

Abstract: In order to facilitate a shape-keeping compression in a process of fabricating an elongated glass-body, particularly a preform for optical waveguides on the basis of SiO.sub.2 in which, from a powdery glass starting material a porous body is formed and sintered into a glass body, there is provided a process in which the filling of the powdery glass starting material into the compression mold is carried out by simultaneously effecting a precompaction and in which, following the fill-in operation, the pre-compacted powdery material is compressed to obtain the porous body. Steps and measures are proposed for stabilizing the flexible hose which is preferably used as a compression mold, in its shape during the fill-in process. For the filling-in of the material there is used a screw conveyor or an arrangement of several screw conveyors arranged coaxially or next to each other, in order to form a porous body having the desired radial material composition.

Abstract: A radome combines low dielectric constant and dissipation factor at microwave frequencies with mechanical strength and rigidity as well as resistance to ablation and rain erosion at hypersonic velocities in the range of Mach 4 to 6. Continuous filament glass fabric and/or strand is saturated with PTFE dispersion. Layers are applied to a mandrel and cold isostatically pressed. The pressed layer may be machined between applications and subsequent pressings. After all layers are applied and pressed, optionally including an outer ablation resistant random fiber reinforced PTFE composite, the densified structure is heat cycled above the crystalline melt point of the polymer to maximize mechanical properties.

Abstract: To produce a panel of variable thickness, a stratified assembly of a layer of fibers containing a non-polymerized binder and at least one cover sheet is placed between the mold and mold-backing of a molding press. The stratified assembly is caused to conform to the interior surface of the mold or mold-backing by forcing the cover sheet against the mold or mold-backing interior. Hot air is blown into the fiber layer from the mold surface opposite the cover sheet, into at least the region that will correspond to the area of greater thickness. The direction of the heated air is reversed after a period of time, the blowing of the air being maintained and adjusted in order to secure polymerization of the binder. At the same time, the portions of the panel corresponding to areas of lesser thickness, generally the edges of an acoustical panel, are cured (the binder polymerized) by contact heating means.

Abstract: The present invention relates to a method of producing compression molded coal to be used for the block charging for the coke oven operation wherein the raw material coal are initially compression molded, a part of said already compression molded coal is caused to remain in the molding box while the subsequent raw material coal is charged to be compression molded, and said compression molded coal is combined so that the compression molded coal may be produced continuously. At the compression molding, the already compression molded coal may overcome the compression force applied to the subsequent compression molded coal due to its friction generated between the molded coals and the molding box. Further application of pressure to the pressing plate after the molding operation will cause the compression molded coal to be pushed out of the molding box.

Abstract: A process for the production of a hollow or a solid profile (21) from dry powder material (27) is accomplished by means of a flexible form (7), through means of which a mold cavity (25) is enclosed in sleeve fashion. The flexible form (7) is capable of being placed under external pressure, over its entire length, radially from all sides, in order to compact, radially, the powder material (27) found, and capable of being poured, inside the form (7). In order to be able to produce endless solid profiles and/or hollow profiles from dry powder material, provided for is that the production of the profile (21) can be accomplished by sections and, additionally, that the mold form (25), running constant at its one end up to the profile diameter, and here limited by the precompacted profile section (21) and at its other end by the mutually convergent inner surfaces (8) of the flexible form provided with a top supply opening (17), is uniformly filled with a measured amount of powder material (27).

Abstract: Disclosed in accordance with the invention is a method for fiberboard manufacture comprising the steps of steaming and grinding woodchips to obtain a wood pulp, using said wood pulp to prepare a slurry of wood pulp in water, mixing said slurry with a binder, a cure catalyst for the binder, a water-repellent additive, peat, and carbamide to obtain a mixture, casting said mixture and dewatering said mixture to obtain a mat, and compacting said mat to obtain fiberboard which is subjected to heat treatment, in which method the peat used has a moisture content of between 25 and 70 percent and the peat content in said mixture is between 2.5 and 50 percent by mass, with the ratio of absolutely dry peat to said binder equal to between 1.0-7:1.0, respectively, while the carbamide content in said mixture is between 0.2 and 2.0 percent by mass, with the ratio of said carbamide to said binder equal to between 0.02-1:1, respectively.

Abstract: A method of preparing a tear-resistant composite sheet material having hydrophilic, absorptive particles enmeshed in a network of interlaced microfibrous polytetrafluoroethylene forming a fibril matrix, the hydrophilic absorptive particles having absorptive particles with absorptive capacity greater than 1.0 gram of water per gram of dry particle, wherein the method comprises:(1) dry blending one or more hydrophilic, absorptive particulate materials;(2) admixing water to particulate to form a damp mixture;(3) adding gradually, with stirring, to the mixture an equal weight of an aqueous emulsion of polytetrafluoroethylene;(4) mixing the mass to cause initial fibrillation of the polytetrafluoroethylene particles;(5) biaxially calendering the mass to produce a tear-resistant sheet having a tensile strength of at least 0.5 megapascal; and(6) drying the resultant sheet to remove water.

Abstract: A structural member is press-molded from a mass of elongated cellulosic particles and a binder. The mass is randomly filled, that is with the particles not extending parallel to one another, into a horizontally elongated compartment defined between a pair of horizontally confronting side walls having central portions, a top wall, and a bottom wall confronting the top wall and extending generally parallel to the top and side walls. The top and bottom walls are then displaced vertically toward each other into predetermined intermediate positions without substantial movement of the side walls so as to vertically pre-compress the mass in the compartment. Thus the particles engaging the top and bottom walls are generally parallelized therewith.

Abstract: An elongated composite structural member such as a pallet cleat is made from elongated cellulosic particles and a binder by first providing a stiff and relatively incompressible board on a first wall confronting a second wall and defining therewith and with adjacent walls a compartment. A mass of the particles and binder are filled into the compartment between the walls and the first wall is displaced with the board toward the second wall and into the compartment into a predetermined intermediate position without substantial movement of the adjacent walls so as to subject the mass in the compartment between the first and second walls to a relatively low compression in a predetermined direction. At least one of the adjacent walls is then displaced transversely into the compartment without substantial movement of the first wall and the board from their intermediate position so as to subject the compressed mass in the compartment to a relatively low compression transverse to the direction.

Abstract: In a method for molding formed parts in automatic multiposition presses, using powdered materials having a flowability characterized by a flow time exceeding 60 seconds per 100 g of powder flowing from a 60.degree. standard funnel with a nozzle aperture of 4 mm and a nozzle length of 4 mm, the powdered material having in the mold a filling height to diameter ratio larger than two, the powder is conveyed into the mold by means of filling devices located at a plurality of separate charging stations, pressed at a separate pressing station and ejected at yet another separate station. The filling heights in each mold is subdivided into at least two individual filling heights so that the filling of the mold to these individual filling heights can be carried out at different charging stations.

Abstract: Sintering method and apparatus. A pre-sintered or compacted mass of particulate material is densified by loading the mass into a substantially closed three-dimensional space defined by three pairs of punches juxtaposed thereacross in three respective directions, and then by multi-axially compressing the mass by advancing the punches of each pair toward each other while energizing the mass with thermal energy. The axes of action of pressures applied thereto by the three pairs of punches intersect substantially at a point substantially constituting the center of the three-dimensional space.

Abstract: An improved hot gas pressing system for use in manufacturing wood-based composite panels reduces in-press time substantially while reducing blistering, pitting, and warping in the final panel. Condensable steam as the preferred gas is injected into both faces of the mat after the press closes to an intermediate position compressing the mat to an intermediate density. After the steam is applied for a predetermined time period at the intermediate density quickly raising the mat temperature, a steam through step is applied after which the press is closed to its final position. Steam is reapplied to both surfaces of the densified mat to maintain temperature further reducing cure time of the adhesive after which venting and vacuum steps are applied to both surfaces of the mat to reduce internal pressure and remove moisture from the mat prior to opening of the press.

Abstract: Engine deposits are controlled by dispensing an additive to fuel. In one aspect, the additive comprises paraffins. In another aspect, a solid form additive for dispensing fuel additive to fuel in solid form is provided by employing a structural agent which is soluble and dispersible in fuel to contain and provide dimensional stability to the additive.

Abstract: An improved, essentially scrap-free, solid-phase process for making thermoplastic articles directly from resinous powder. The process can be particularly advantageous to forming large parts from thermoplastic resinous powders. The method essentially comprises taking resinous powder, briquetting the powder, sintering the briquette, repressing the powder in a warm state and then shaping the briquette into a preform or a blank which can then be thermoformed into a resulting container or other product, assuming the blank itself is not the desired end product. Alternatively, sintering can take place after repressing with preheating of the briquette prior to the repressing step.

Abstract: The process includes a first molding step with an upper surface of the glass wool pelt having been sprayed with water and with a lower surface of the glass wool pelt insulated from the lower mold portion by a previously molded glass wool insulating sheet, and a second molding step with the insulating sheet removed.

Abstract: A nonswelling mass of fibers and a thermosetting synthetic resin are cold pressed into a preform body having a predetermined primary volume. This preform body is then hot pressed into an intermediate body having a secondary volume smaller than the primary volume. The press is then opened and a thermosetting synthetic-resin skin is applied to at least a portion of the surface of the intermediate body. Thereafter the skin and body are together pressed into a final integrated body having a volume smaller than the secondary volume. The skin is applied to the intermediate body as a foil.

Abstract: Disclosed is a decorative molded article, for example, in the form of a flat plate for structural application such as constructional panels, which comprises a core of wood and/or cellulose fibers, pressed together with a thermosetting synthetic resin under conditions suitable for hardening the resin. The resin content amounts to more than 150 and up to 900 g per 1000 g of dry fibers, and the density of the molded article is between 900 to 1600 kg/m.sup.3. A decorative layer is placed onto one or both surfaces of the molded article, for example, a decorative foil or a coating. A process for producing and also using the molded article is also described.

Abstract: A process for preparing a thermoplastic poly(imidesulfone) is disclosed. This resulting material has thermoplastic properties which are generally associated with polysulfones but not polyimides, and solvent resistant which is generally associated with polyimides but not polysulfones. This system is processable in the 250.degree.-350.degree. C. range for molding, adhesive and laminating applications. This unique thermoplastic poly(imidesulfone) is obtained by incorporating an aromatic sulfone moiety into the backbone of an aromatic linear polyimide by dissolving a quantity of a 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) in a solution of 3,3'-diaminodiphenylsulfone and bis(2-methoxyethyl)ether, precipitating the reactant product in water, filtering and drying the recovered poly(amide-acid sulfone) and converting it to the poly(imidesulfone) by heating.

Abstract: A friction material for use as a brake lining in automobiles, trucks, buses or similar vehicles. The brake lining contains no more than traces of asbestos and utilizes the mineral vermiculite as a basic constituent. The formulation of the brake lining comprises a non-fibrous natural or synthetic mineral or mineral-like material which on being compressed at ambient temperatures and at pressures of 1700 to 2600 p.s.i. has significant green strength in the order of 2 to 25 p.s.i. and also has appropriate thermal resistance, frictional properties, and shear and flexural strengths, together with a thermosetting resin as the basic components together with other organic and inorganic materials as friction modifiers and fillers. The mineral preferably comprises vermiculite, and together with the resin comprises preferably about 35% to 100% by weight of the brake lining formulation. The ratio by weight of resin to vermiculite is preferably in a range having a upper limit not exceeding about 1.2/1 to 1.

Abstract: A process for producing detergent tablets from free flowing spray dried base builder beads comprising inorganic detergent builders. The builder beads comprise alkali metal phosphate, alkali metal silicate and water. The alkali metal phosphate, component includes a hydrated and an anhydrous portion. Relatively large amounts of liquid or liquifiable detergent ingredients such as surface active agents etc. can be applied to the base beads after spray drying, without destroying their free flowing properties. The base beads are suitable for compression into coherent tablets. The resulting tablets are of improved detergency, physical integrity and solubility.

Abstract: A method for forming articles such as crates in which sides of the crate extend generally perpendicular to the base of the crate. The method includes forming a layer of loose binder coated wood particles, precompressing selected portions of the layer which form the sides of the crate, bending the precompressed portions upwardly, inserting the so formed layer in a mould and compressing the layer in the mould to form the desired article. The initial layer can be slightly compressed to hold the particles together and the base of the article can also be slightly precompressed but to a lesser extent than the portions which form the sides.

Abstract: A process for molding a friction material for use as brake lining in automobiles, trucks, buses or similar vehicles. The brake lining contains no more than traces of asbestos and utilizes the mineral vermiculite as a basic constituent. The formulation of the brake lining comprises a non-fibrous natural or synthetic mineral or mineral-like material which on being compressed at ambient temperatures and at pressures of 1700 to 2600 p.s.i. has significant green strength in the order of 2 to 25 p.s.i. and also has appropriate thermal resistance, frictional properties, and shear and flexural strengths, together with a thermosetting resin as the basic components together with other organic and inorganic materials as friction modifiers and fillers. The mineral preferably comprises vermiculite, and together with the resin comprises preferably about 35% to 95% by weight of the brake lining formulation. The ratio by weight of resin to vermiculite is preferably in a range having a upper limit not exceeding about 1.

Abstract: A flat gasket incorporating a metallic reinforcement layer which is enclosed within the gasket in relation to one edge thereof is formed from relatively uncompacted, i.e. loose, expanded graphite particles by a method comprising the step of pressing such particles onto the opposed faces of said reinforcement substantially simultaneously to form compacted graphite foils in situ thereon while at the same time pressing some of said particles relative to said one edge to form a single unreinforced graphite foil portion extending from and integral with the other foils to enclose said one edge.

Abstract: A laminated decorative tile particularly for flooring purposes, is made by forming a base layer of granulated cellulosic material in a matrix of fusible plastics, and placing on the base layer a thin decorative layer of cellulosic material with natural holes and recesses therein. After a film of fusible plastic has been applied on the decorative layer the laminate is hot pressed and then immediately cooled in a cold press. The tile obtained has a pleasing appearance because the granules of the base layer have been forced up, in the hot pressing operation, into the holes and recesses of the decorative layer, filling out these holes and recesses. In this embodiment the tile has a smooth wear resisting layer surface but this surface can be provided with a relief pattern such that it conforms to the structure of the decorative layer, if the tile after cooling is heated in a free state, i.e. without press plates.

Abstract: Method and apparatus for shaping of mats composed of loose fibers with a thermosetting resin interspersed throughout. The apparatus compresses the mat and exposes its laterally extending surfaces to elevated temperatures to obtain partial curing thereof. Slits are made in the surface regions adjacent areas where extra shaping will occur in forming the final product. These slits enable more precise shapes to be impressed upon the mat and eliminate the tendency of the partially cured areas to spring back to a position of lesser compression.

Abstract: A particulate mass to be sintered is imbedded in a mold which comprises a porous mass of particulate refractory material enclosed within a flexible membrane. Six press units are provided for applying compressive pressures externally to the mold, together or in sequence, whereby to subject the sinterable mass to pressures in the respective directions, under the control of a preprogrammed control unit which receives clock pulses from a source and stimulates the respective press units. A flexible heating coil imbedded in the mold is supplied with alternating current from a source to inductively heat up the sinterable mass and the adjacent mold material, to enable sintering to occur. The sinterable mass may have been precompacted into a self-supporting so-called "green compact", or it may be supported in a self-supporting shell carried within and forming part of the mold. The mold preferably comprises three layers having characteristics chosen so as to assist in heating up the sinterable mass uniformly.

Abstract: The invention comprises a method for densifying powders utilizing a pair of opposed gas-permeable belts arranged to either side of a common axis so as to define a generally convergent densifying zone between their adjacent faces. The belts are supported spanwise by a plurality of opposed spaced apart support rolls, each opposed pair of rolls defining a densifying station therebetween. The gas-permeable belts are driven toward the convergent end of the densing zone at substantially equal speeds while powder material to be densified is fed into the divergent end of the densifying zone at a rate sufficient to maintain a substantially complete fill thereof.

Abstract: A method of molding a perforated article involves supplying a formable material to a preforming chamber where the material is compressed so that it substantially assumes the cross-sectional shape of the preforming chamber. The formable material is then transferred under compressive forces to a molding chamber, which has a volume less than the volume of the preforming chamber and a shape which substantially matches the shape of the perforated article to be molded. The formable material is then heated in the molding chamber to cure it and thereby form the perforated article.

Abstract: A method and an apparatus for manufacture of moulded mineral wool objects which are bound by a binder and which have a substantially constant cross-section along their entire lengths, whereby mineral wool in the form of flocks and/or granules which are impregnated or mixed with a binder and which are collected in a feeding chamber to which a mould channel is connected. The mineral wool is continuously or stepwise pressed by a compressing device into and through the mould channel and during the movement therein it is subjected to a heat treatment to cure the binder of the mineral wool, whereupon the continuous body of bound mineral wool is expelled from the channel. If desired it is subjected to a surface treatment or any subsequent treatment and is cut into intended lengths. The channel may include one or more cores providing one or more axial bores through the mineral wool body.

Abstract: In an anvil assembly for powder-compacting press wherein an article is compacted of powder material against the face of the anvil clamped in position over a die cavity filled with powdered material, a reciprocable punch being disposed at the bottom of the die cavity for compacting the powdered material against the anvil face, the anvil is provided with a movable face portion which, during compaction of the powder material, is displaced away from the die cavity, compressing an elastomeric return spring.

Abstract: A flame retarded composition containing tetrahalophthalate plasticizer and a halogenated resin is provided.

Abstract: An annular die and a matingly provided annular punch cooperate for stepwise building-up a hollow; the punch has one or two channels to which powder is fed; the amount for each feed is limited so that the height of the powder compressed in each step is about 0.6 to 0.8 times the annular dimension of the product to be made.

Abstract: The hot pressing of ceramic material in dies forming a column, each die being shaped to interfit and cooperate with adjacent dies to cause densification of ceramic material within the dies when pressure is applied to the column. The column of dies is passed intermittently through a fixed, heated zone and pressure is applied to the column intermittently to move the dies through the heated zone and, as a separate step, to compress the column and cause densification of ceramic material in the dies.

Abstract: The present invention relates to a process for producing molded parts from flat tangled fiber fleece mats, preferably formed from binder-containing cellulose or lignocellulose fibers, in which the fiber mat is compressed by press tools and is subsequently optionally provided with a decorative surface layer. The compression takes place in two stages of premolding and final molding in successive strokes in a single press without intermediate cooling and the decorative surface layer is supplied to the press after final molding. Between the press tools which are in the open position for the first process stage is introduced a premolding tool used for premolding the fiber mat, for the decorative process stage following the final molding in the open press tool an auxiliary tool is introduced which, with regards to the compression molding pressure, temperature, shaping and/or surface structure, can be matched to the characteristics of the decorative surface.

Abstract: A method of forming an air-laid web or sheet of wood pulp fibers suitable for tissue and toweling applications comprising airlaying a web of wood pulp fibers, applying water containing a chemical softening agent to the web, pressure bonding the water-treated web to provide dry stength, preferably drying the pressure-bonded web, applying an adhesive containing solution to the dried web to provide increased wet strength, and drying the web to form the finished product. By adding a chemical softening agent to the water applied to the air-laid web ahead of the pressure bonding rolls, the strength and softness of the finished web can be controlled. Alternatively, the chemical softening agent can be added to the printing adhesive solution.

Abstract: In a hydraulic press for briquetting loose powders into green components, a load cell senses maximum compacting force. The maximum compacting force is compared with a compacting standard force known to effect a particular weight and density of compacted briquette. There is next operated a closed-loop servo network which adjusts the peak force to the standard force by varying the initial size of the cavity receiving the loose powders. Should the peak force be greater or less than standard force, an actuating mechanism is energized either to enlarge or diminish the die cavity for receiving the powder. If the peak force is too small, the initial die cavity size is enlarged so that a greater amount of powder is charged to the die cavity. The result is that when the final configuration of the briquette is reached, there will be greater density and greater weight to the briquette, causing it to more nearly approximate a standard briquette weight and density.

Abstract: Particleboard is manufactured by scattering an endless mat of chip and binder material on a series of overlapped mat carriers 17 moving on a forming conveyor 2 beneath a scattering station 1. A cut-off saw 5 is then used to separate the endless mat into mat sections 18 each of which is mounted on a respective mat carrier 17. The overlap between the mat carriers is eliminated and the laden mat carriers are removed from the forming conveyor 2 by an accelerating conveyor 6 which simultaneously operates as an intermediate store and a feed unit for a single storey press 8 arranged immediately after the accelerating conveyor 6. The accelerating conveyor 6 introduces the laden mat carrier into the inlet to the press from where it is transported into the press by internal transport devices of the press. After the mat section has been pressed to form a particleboard a pair of driven rollers 9 extract the mat carrier from the press and feed it towards a separating wedge 10.

Abstract: A process for producing detergent tablets from free flowing spray dried base builder beads comprising inorganic detergent builders. The builder beads comprise alkali metal phosphate, alkali metal silicate and water. The alkali metal phosphate, component includes a hydrated and an anhydrous portion. Relatively large amounts of liquid or liquifiable detergent ingredients such as surface active agents etc. can be applied to the base beads after spray drying, without destroying their free flowing properties. The base beads are suitable for compression into coherent tablets. The resulting tablets are of improved detergency, physical integrity and solubility.

Abstract: In the growth of gadolinium gallium garnet monocrystals, a crucible is charged with a preformed body (65) of oxide powders to form a melt. In preparation therefor, the oxide powders are formulated into a typical particulate material (16) which is compacted into a body (65) having a desired size and shape. For holding material (16), there is provided a pouch (38) of a first size having elastic walls expandable to a second size, larger than body (65). The pouch (38) is disposed within a chamber (36) having inside walls conforming to the desired shape of the body (65) but of the second size. An open neck (42) of the pouch (38) extends through and is sealed to an opening (60) in chamber (36). Then a vacuum is drawn between the pouch (38) and chamber (36) to expand pouch (38) to said shape and second size formed by the chamber walls. As the particulate material (16) is introduced into the expanded pouch (38), such material conforms to the shape and second size of such expanded pouch.

Abstract: An extruder has a nozzle from which it extrudes a strand formed of a mixture of wood chips and a synthetic-resin binder into a passage formed by a plurality of transversely and longitudinally movable walls. Opposite walls are urged transversely inwardly by respective hydraulic cylinders to compact and densify the strand as it cures, and other cylinders urge the walls upstream toward the nozzle with a force slightly smaller than the extrusion force. Thus as the extrusion force exceeds the opposite longitudinal biasing force the walls will move downstream with the strand, to return upstream between advance steps of the strand.

Abstract: A method of and apparatus for the cold extrusion of a mixture of plant particles and a binder, especially for the production of load-bearing beams and similar shaped bodies in which the plant particles are wood chips or the like, utilizes a plunger, ram or piston for displacement of the mixture into the extrusion passages (in which hardening can occur) under conditions such that the material flows during compaction and is compressed with a densification ratio of 2:1 to 4:1 (preferably 3:1), a plunger stroke of 400 to 800 mm (preferably 600 mm) and a velocity of the plunger between 0.04 and 1.5 meters per second (preferably 0.06 meters per second).

Abstract: The process comprises placing an amorphous metal in particulate form and a low molecular weight (e.g., 1000-5000) thermosetting polymer binder powder into a container, mixing these materials, and applying heat and pressure to convert the mixture into an amorphous metal composite.

Abstract: A method is provided for producing a compression molded, fiber reinforced, plastic panel comprising a plate having an outer surface and an inner surface bearing integrally molded reinforcing members, which method comprisesA. Providing a mold with heated first and second mold members that close to form a configuration for the panel, one of the mold members having a surface interrupted by rib-forming chambers having a width about equal to or less than the thickness of the plate and a depth at least equal to the thickness;B. Introducing molding compounds between the mold members in layers positioned one atop another a first part of the layers comprising thermo setting resin and relatively short chopped fibers and the other part comprising thermo setting resin and relatively long chopped fibers;C. Closing the mold members upon the molding compound at a relatively high pressure to cause flow of the molding compound whereby the relatively short fibers flow into the rib-forming chambers;D.

Abstract: A scrap-free, substantially solid phase, relatively low temperature economical process for rapidly making plastic articles from resinous powders wherein the resultant articles can comprise various polymers including oriented polymers; polymers with a high practical heat distortion temperature; expanded polymers; ultra high molecular weight polymers; blended structures of two or more materials; or multilayered structures. The resinous powders are initially compressed into briquettes, which briquettes are heated to a temperature in the range from about the alpha transition temperature to less than the melting point or melt temperature of the polymer therein to both somewhat soften and sinter the briquettes. The sintered briquettes are forged under conditions which permit substantial plug flow deformation into preforms whereby fusion of the sintered resin powder particles occurs.

Abstract: An apparatus for manufacturing plastics products from a raw material containing at least 50% by weight reclaimed synthetic thermoplastics material by conveying a mat of the raw material through an oven to heat the material to the softening point thereof, and compressing the softened mat downstream of the oven between three rollers arranged generally one above the other to define a first nip or passage between the upper and middle rollers and a second nip between the middle and lower rollers, wherein the middle and lower rollers are of substantially greater diameter than the upper roller.

Abstract: Articles of zeolite, such as 6 mm thick plates suitable for use in cryopumps, are produced by cold isostatic pressing fine powders with pore sizes between 2-25.times.10.sup.-10 m without the aid of binders. Plates which have smooth hard surfaces and high porosity may be readily machined.