Abstract: A hydraulic press for refractory material including a mold box rigidly supported by a press frame. A lower plunger assembly positioned below the mold box and includes a lower crosshead and at least one plunger adapted to extend upwardly into a vertical mold cavity in the mold box. An ejection cylinder assembly supported by the press crown is provided for causing selective vertical movement of the lower crosshead. An upper plunger assembly is positioned above the mold box and includes an upper crosshead and at least one upper plunger supported by the crosshead and adapted to extend downwardly into the mold cavity. A hydraulic cylinder is provided for supporting the upper crosshead for vertical movement with respect to the mold box and the lower crosshead. The hydraulic cylinder is fixedly connected to the lower crosshead, and a ram is housed in the cylinder and adapted to selectively drive the upper crosshead downwardly.

Abstract: A press is disclosed for use in compressing refractory material in the manufacture of bricks and the like, the press including means for supporting a mold box in the press in such a manner that the mold box is easily and quickly removed from a supporting mold table, and wherein the hydraulic clamping apparatus of the press can also be used to provide the motive force for separating the mold box from the supporting mold table.

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 press for compressing pulverulent materials into both concave and convex pieces includes a press frame, a die carying plate, upper and lower punches, holders for carrying the punches and control devices for controlling the displacement of the upper and lower punches. The press comprises also a first piston-cylinder device for controlling the displacement of the die carrying plate, a second piston-cylinder device fastened to the frame and supporting the die carrying plate, levers arranged above the die carrying plate and having one end pivoted to the frame and sliders slidable on the opposite ends are provided in the press. The first piston cylinder device acts on the other ends of the levers to exert thereon a pressure depending on the distance of the sliders from the other ends of the levers.

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: In presses such as hydraulic presses used for forming tiles or bricks from ceramic or other materials, a mold box is mounted in alignment with the upper and lower dies. To hold the mold box without keying it to the mold case, a wedging assembly comprises an outer wedge releasably fixed to a wall of the opening and having a vertically angled surface facing inwardly. Next to it is an inner wedge having a vertically angled surface which is brought into contact with the angled surface of the outer wedge. Adjustable securing means such as vertical bolts pass through a vertical passageway in the inner wedge and are screwed into an aligned, threaded passageway in the outer wedge for moving the inner wedge vertically until its translation laterally secures the key-less mold box fast by friction alone against downward thrusts of the upper die.

Abstract: A peripheral edge-containing member is provided to reduce the length of the projectile path of fragmented particles expelled outwardly from the peripheral edge of a frangible pressing plate which is broken during the press-stretching or press-polishing of acrylic sheets. The acrylic sheets are fabricated for use in light weight transparencies.

Abstract: A molding press comprises a stationary platen or die fixed in a machine frame and a cooperating movable platen or die positionable toward and away from the stationary platen for operation through a molding cycle. Cam slot and follower guide means direct the movable platen through a clamshell movement; and a scissors mechanism is connected between the machine frame and the movable platen with a reversible electric motor providing rotational force to the lead screw of the scissors mechanism.

Abstract: Isostatic moulding apparatus comprises a fixed frame assembly comprising an upper bolster, a lower bolster and connecting rods with a clamp cylinder in the lower bolster; a pressure vessel with removable end members is mounted on a support which is pivotably mounted on one of the connecting rods so that the pressure vessel can be swung into the fixed frame assembly to overlie the piston of the clamp cylinder. The pressure vessel and the clamp cylinder are connected to a common source of hydraulic pressure fluid so that application of pressure simultaneously clamps the end members and effects moulding of a compact within the pressure vessel. After the pressure vessel is swung out of the fixed frame, a cylinder is extended to move a trolley down cam tracks to lower the bottom end member of the pressure vessel so that the compact can be removed therefrom.

Abstract: A mold-handling apparatus in which a pair of mold carriers can be locked together for the molding process but, upon separation, each tilts through 45.degree. to afford improved access to the mold halves following a molding operation or before a molding operation. According to the invention, the upper mold carrier is swung about a fixed axis by a fluid-operated cylinder while another fluid-operated cylinder shifts a slider vertically to lower the pivot of the lower mold carrier and enable the latter to engage abutments which tilt the lower carrier.

Abstract: The invention relates to a mold for the production of dishes from powdered ceramic materials wherein two coaxial cylindrical dies are displaceable to generate with their end facing walls a cavity to be filled with the powdered ceramic materials, said cavity being peripherally completed by a displaceable die-box provided with a vertical conduit through which the ceramic material is fed into said cavity. An auxiliary die-box is provided sideways on said die-box, displaceable at least along one of said cylindrical dies, the lateral facing walls of said die-box and of said auxiliary die-box (16) being provided with annular grooves that in the closed condition of said lateral walls generate an annular cavity that may be registered in correspondence with said first-mentioned cavity of the mold, radially prolonging the latter and forming the peripheral border of the dish to be produced.

Abstract: A hydraulic press having upper and lower hydraulically operated plates whereby the upper plate is movable with a long stroke cylinder and the lower plate is movable wth a short stroke cylinder. The press has a grooved load bearing rod which is attached to the upper moving plate and passes through the upper fixed plate of the press with a series of slots machined in the rod. A split ring and an especially ground shim are located on a bushing in the upper plate and in one of the ground grooves. A locking plate is attached to the lower part of the upper fixed plate and using a hydraulically operated cylinder has locking plates which move into and out of engagement with the grooved rod to accurately locate the position of the upper moving plate when the machine is stroked. This method of adjusting the horizontal position or parallelism of the plates enable very accurate positioning of the mold or dies which are mounted between the plates of the press.

Abstract: A preform molding apparatus includes a mold cup which has opposed top and bottom mold members and a carrier arm between the mold members. The top mold member has a concave mold recess in its bottom surface and a semi-cylindrical rim extending downwardly from the edge of the mold recess. The bottom mold member has a concave mold recess in its top surface and a mold material inlet opening into the bottom of the mold recess. The carrier arm has a semi-cylindrical opening therethrough at one edge thereof. Pneumatic cylinders have piston rods connected to the mold members and the carrier arm for moving the mold members toward and away from each other and the carrier arm transversely across and away from the mold members.

Abstract: A mold has at least two primary mold parts movable in a primary direction away from each other from a closed position defining a mold cavity to an open position, and at least one secondary mold part which may be a core pin or a stripper which is movable in the secondary direction transverse to the primary direction relative to at least one of the primary mold parts. An actuator has a primary rack extending parallel to the primary direction and a secondary rack extending parallel to the secondary direction and secured to the secondary mold part. These racks have respective primary and secondary rows of teeth having substantially parallel tooth flanks inclined to the respective directions, the primary row meshing with the secondary row.

Abstract: A press is disclosed for use in compressing refractory material in the manufacture of bricks and the like, the press including means for supporting a mold box in the press in such a manner that the mold box is easily and quickly removed from a supporting mold table, and wherein the hydraulic clamping apparatus of the press can also be used to provide the motive force for separating the mold box from the supporting mold table.

Abstract: A fluid-operated press comprises a crosshead, a bead, four upstanding posts each extending vertically between each corner portion of the crosshead and each corner portion of the bead, and a slider disposed between the crosshead and the bead and slidably fitted on the posts to be slidable along the latter. An upright wall structure located outside the slider and the posts is clamped between the crosshead and the bead to enhance rigidity of the frame structure of the press. The upright wall structure has a wall portion surrounding at least that portion of the peripheral surface of each post which, as viewed in cross-section of the press through the upright wall structure, is positioned between two lines obtained by extending two adjacent sides of a rectangle which is formed by connecting the center points of the four posts.

Abstract: New type of hydraulic presses with heating plates are described.The press ensemble has a compact structure which allows the symmetric absorption of expansions due to heating and is equipped with ways allowing to bring the heating plates to a same level in comparison to the ground.The hydraulic presses are used to form moldable material by polymerization and pressing of rotor hubs of helicopters.

Abstract: A holding device for surface sheets or surface plates in a press intended, for example for pressing wood fiber products, include a press plate, a vacuum source for supplying vacuum to the side of a surface sheet or surface plate which faces toward the press plate, a vacuum distributing body placed between the press plate and the surface sheet, and a seal which is arranged to provide sealing between the present plate and the surface sheet. A substantially air-impervious sheet is disposed between the press plate and the surface sheet to form two essentially closed spaces coupled in air communication with the vacuum. This arrangement permits independent removal of the surface sheets from the press plates.

Abstract: There are disclosed an apparatus and a method for continuously embossing synthetic plastic sheet material with precisely formed embossments in patterns repeating along the length thereof. The apparatus includes a movable polished belt upon which the sheet material is carried, and a series of molds are placed on the sheet material. As the sheet material and molds are advanced in steps through the apparatus, presses clamp the molds and belt against opposite surfaces of the sheet material and raise the temperature of the assembly to embossing temperature for the resin to cause the resin to flow into the mold cavities, and volatiles at the interface are dissolved in the resin. After the embossing step, the clamping pressure is released and this permits limited shrinkage of the mold and sheet material.

Abstract: The present invention provides a device for pressing objects made from a thermoplastic material, of the type comprising a mould with a die support plate floatably mounted on an elastomer. The die support plate is formed from at least two parts movable in relation to each other, each of these parts supporting a distinct die and bearing separately on the elastomer.

Abstract: The materials to be sintered are placed in a deformable container which is in turn placed within a non-deformable treatment module equipped with heating means. The temperature of the container is increased under constant pressure until commencement of sintering. The temperature and pressure of the materials are increased simultaneously until sintering conditions are achieved, then maintained at a level stage for a predetermined period of time. The pressure is then reduced to the normal value while maintaining the temperature. The temperature is finally reduced to the room-temperature value.

Abstract: A means for moulding thermoplastics video discs having one or two shaped resilient compensators to maintain the stamper plates in parallelism with the plastics foil during moulding. The compensators may be of a rubber and may contain a thermally conductive material.

Abstract: In order to make large panels of expanded thermoformable material in a process in which a blank of the material is placed between two heated mold plates, the blank adhered to the plates by hot tack adhesion; the plates separated and the expanded material cooled, while maintaining commercial tolerances, the mold plates are supported on elongated mounting studs.

Abstract: A filter press, e.g. for the manufacture of insulation products from an aqueous slurry, which has a number of movable platen portions. The platens have individual actuating means which are adjustable relative to one another but are controlled by a common drive which can move all the portions simultaneously as one platen.Also the method of using the press for the manufacture of insulation products. SUThe present invention relates to the manufacture of sheet or slab form insulation products from relatively free flowing slurries, for example containing calcium silicate and/or fibre. In particular it relates to a filter press which can be used to make such products. It also relates to a method of making sheet or slab form insulation products.Such products may be made by paper and/or board making techniques, they may also be made by filter pressing in which a measured volume of slurry is poured into a foraminous mould cavity and then de-watered by pressing.

Abstract: A punch press remotely disengageable from the punch drive mechanism, particularly useful where the press must operate in a hostile environment. The press includes a punch block, supporting one or more punches, which is laterally inserted into connection with the punch drive apparatus. A die set is provided for supporting one or more dies, and the die set is associated with the punch block such that the punch is guided into a preselected position relative to the die by the drive apparatus. A structural frame is provided for seating the die set, which can be laterally inserted and removed from the frame. Guide rails are also provided which can extend laterally from the frame and support the die set in a position removed from the normal operating position within the frame. The guide rails also support the die set in the operating position.

Abstract: Two mold sections of a mold for compressing a ceramic or refractory material into tile preforms are mounted on respective platens of a pressing machine for displacement toward and away from one another. One of the platens is a part of a frame which further includes upright beams and a support stationarily mounted on the upper ends of the beams. A plurality of cylinder-and-piston units the pistons of which are accommodated in bores of the movable platen and the piston rods of which extend outwardly of the bores and toward the support, is distributed over the movable platen and so acts thereon as to avoid bending of the movable platen.

Abstract: A press comprises an open-topped cylinder in which a piston is moved by the injection of hydraulic fluid. The cylinder has a flange and is capped by a flanged lid. Clamping elements clamp the two flanges together. The plattens between which the high pressure reaction takes place are carried by the piston and by the lid.

Abstract: Plasticizable material is pressure molded into articles free from flash in mold cavities of specialized molds defined by separate mold sections with removable cores. Prior to and during molding, the sections are held clamped together to fully confine the material which is pressurized by reducing the volumetric capacity of each cavity. This pressurization is maintained until the material is set or cured, and may be increased before final set to forge or densify the material further. The method employs a conventional press and two gangs of specialized two-piece, multi-cavity molds. The molds of each gang are supported in a horizontal row, with their juxtaposed flat faces and parting planes disposed vertically, for movement of each mold section flatwise endwise of the row to open and closed positions. The mold sections are clamped closed by power means which apply extraneous clamping pressure independently of the press operation.

Abstract: A press mechanism that is powered by hydraulic, electrical and/or pneumatic means is provided with an improved ratchet and pawl machine which acts as a fail-safe device should any of the power means fail to lock the press parts in place. The fail-safe device includes a ratchet in the form of a circular or arcuate segment mounted with its circular center substantially coaxial with one of the turning parts of the mechanism or press, a pawl having a single tooth and a circular arcuate peripheral part that acts as a journal bearing and which in turn is supported by a pawl bearing which in turn is secured to a stationary part of the mechanism and has an arcuate journal which receives and supports the pawl therein. Tremendous load carrying capacity is thus achieved because of the large bearing area provided by the pawl bearing and the positioning of the respective ratchet and pawl teeth to employ a surface rather than point contact.

Abstract: A cooker assembly for use in heat forming a discontinuous cross-section of mold extruded granular material. The cooker assembly has two frames pivotally connected at one end. A pair of hydraulic cylinders are interconnected between the frames for moving the two frames between opened and closed positions. The upper frame has a planar surface for engaging the upper surface of the material as it leaves the mold and is provided with longitudinal heaters for heating the materials as it passes through the cooker assembly. The lower frame has an uneven contoured surface closely approximating the lower surface of the material as it is extruded and heaters extending longitudinally therethrough for heating the material as it passes through the cooker assembly.

Abstract: A multiple mold assembly is disclosed for molding articles in an injection molding apparatus. The assembly includes two molding sections that are alternatively shuttled from positions wherein one of the molding sections is in position for a molding operation, and the other molding section is in position for loading of inserts, performing preparatory or finishing operations, or removal of molded articles, to the reverse positions. The shuttle assembly of this invention is particularly adapted for use in a horizontal injection molding apparatus and for insert molding.

Abstract: In the application of working pressures, devices are used of the type having at least two members by which the working pressure is applied and a connection between them operable to vary the relationship of one of them relative to the work. Each connection includes first parts with the first part rotatably carried by the one member. Each part has an eccentric portion of a circular section with that of the first part rotatable within the eccentric portion of the second part and the second part is rotatably carried by the other pressure-applying member. Adjusting means are provided to turn the parts equally but oppositely with the members operatively connected and with the axis of the eccentric portion of the second part always in the plane of a predetermined line of force inclusive of the axis of the first part.

Abstract: A mold for forming a recycled rubber material under high pressure and temperature comprises a female mold member having a rectangular solid exterior and a pyramid cavity extending into the base thereof. A pair of opposed detents or latches are pivotally secured to each end of the female mold member, adjacent to a pair of slots extending into each end. The male mold member comprises a base plate from one side of which extends a pyramid member. To the opposite side a pair of parallel bars is welded, disposed to be received in the slots in the female member. With a charge of recycled rubber material disposed in the female member of the mold, the pyramid portion of the male mold member is placed in the mold cavity, and the two are compressed together by external means, creating very high pressure in the rubber material. The detents are pivotted to engage the bars, locking the mold members together and maintaining the high internal pressure without the external means.

Abstract: A device for pressing storage substrates made of thermoplastic material. It comprises: a press having two plates, a matrix attached to one of the plates, the matrix carrying the data to be stored in said substrate, and, arranged between the plates, one rubber sheet, on polyethyleneterephtalate sheet and a metal film. The superimposition of these different materials ensuring a properly uniform pressure over the substrate.