Abstract: The invention is addressed to the problem of providing a method whereby a mixing of bulk material containing fibers (fiber material) and plastic granules for the plasticate extrusion of long fiber reinforced thermoplastics (LFT) will be possible during the melting process with high production outputs and with minimized material content in the extruder system and minimized fiber damage, and to the problem of creating an apparatus with an extruder for the practice of the method, which will have an extruder housing of modified geometry as to the feed opening and the corresponding screw elements, so that the disadvantages described above are avoided.

Abstract: A process and an apparatus for producing endless laminated veneer boards from a veneer-panel strand comprising veneer panels laid together in a plurality of layers by means of gluing and compression in a heated, continuously operating press. The veneer-panel strand is run through a preliminary press with a preheating device before it enters the press. The preliminary press comprises a high-frequency or microwave-energy preheating device, the preheating device being adapted to focus energy and a reflection of said energy in a central region of veneer-panel strand.

Abstract: The invention relates to a method of gluing veneers to form LVL and plywood boards from veneers laid one over the other in several layers by curing the adhesive placed between the single layers in a heated press. The invention consists in the fact that the gluing and pressing of the outer layers of a veneer pack to form LVL and plywood boards is performed by high-temperature adhesive and the inner layers by low-temperature adhesive, so that the amount of heat to be put into the veneer pack decreases from the outside in.

Abstract: The process relates to the production of boards of wood-based material, in particular, oriented strand board, chipboard or fiberboard comprising lignocellulose- and/or cellulose-containing particles. The particles, in the form of chips, fibers, chippings or the like, are mixed with a binder and scattered in a scattering station onto a moving molding belt to form a mat of pressed stock. The mat of pressed stock is pressed and cured by the application of pressure and heat in a platen press or a continuously operating press. To accomplish surface structuring during the production cycle, the finished board of wood-based material just released from the pressing operation is subjected to a structuring operation on one or both sides.

Abstract: The invention relates to a method and a plant for assembling, gluing and pressing veneer panels to be connected in a plurality of layers one above the other and one behind the other to form an endless strand of laminated veneer boards forming a continuous veneer-panel strand. The plant has a glue application machine, rolling belts, a laying device and a continuously operating press. A veneer-panel laying and interlinking device has a buffer acceleration belt with a combined reversing action. The laying device has a veneer-assembly laying belt and is embodied as a recirculating chain device with a recirculating supporting surface to form a fall-through gap, which can be moved forward and backward and raised and lowered for the front or rear veneer-panel edge and can be adjusted to the respective deposition and interleaving position on the veneer-assembly laying belt.

Abstract: A method for producing fiber-reinforced polymer compositions and a plasticating extruder for carrying out the method. The method includes passing the fiber strand along at least one coating nozzle into a feed opening; winding the fiber strand onto and around at least one extruder shaft; drawing the fiber strand into barrel bores of a screw barrel; applying a liquid polymer onto a first flat side of the fiber strand from the first coating nozzle; pressing a second side of the fiber strand into a liquid polymer film that was already applied on the screw shaft; and feeding the polymer impregnated fiber strand into screw barrels in a discharge and conveying zone. The plasticating extruder has a drawing-in and impregnating zone and a discharge and conveying zone. The plasticating extruder has a heater.

Abstract: The invention relates to a process for the production of boards of wood-based material from a mixture of lignocellulose- and/or cellulose-containing particles mixed with a binder, the mat or pressed stock being preheated by means of high-frequency (HF) or microwave (MW) energy and, after transfer into a single or multi-platen press or a continuously operating press, being pressed and cured by the application of pressure and heat.

Abstract: A molding installation for producing molded parts from plastic in which the molding compound is plasticized in an extruder unit and is introduced into the mold of a compression-molding unit by an injection unit. The extruder and one or more injection units are independent units arranged on a coordinate table. The extruder and injection units can be separated from and joined to one another such that one or more injection units can be releasably coupled to an extruder unit, then uncoupled from the extruder unit and moved toward one or more compression-molding units. Accordingly, two or more injection units can be filled using one extruder unit. Because the injection unit can be uncoupled from the extruder, only the significantly lower mass of the injection unit has to be moved in order to deposit the melt strand inside the mold, and thus it is possible to move the injection unit more quickly using less power.

Abstract: A process and installation for the continuous production of boards of wood-based material, includes the steps of forming on a continuously moving scattering belt, a pressed material mat includes an initial mixture of chips and/or fibers from a scattering station and mixed with binder; precompacting and preheating the pressed material mat between the scattering station and a main pressing region; and bringing into an end form and curing the pressed material with the application of pressure and heat in a main pressing regions. The moisture level of the pressed material mat is less on entry into the main pressing region than the moisture level of the initial mixture in the scattering of the pressed material mat, part of the moisture imparted to it in the scattering being extracted again by hot-air preheating.

Abstract: A hydraulic deep drawing apparatus for a press for drawing shaped sheet metal parts from a workpiece. The apparatus comprises hydraulic pressure cylinders, a sheet holding plate supported by the hydraulic pressure cylinders and onto which the workpiece is laid, a tool baseplate arranged under the sheet holding plate, a ram which moves vertically toward the workpiece until just before contact with the workpiece, and which is fixed to a frame of the press at a gap .DELTA.s from the workpiece, and a multipoint unit having plural short stroke cylinders arranged according to a drawing ring contour, the short stroke cylinders being hydraulically actuated to bridge the gap .DELTA.s and press the workpiece against a drawing ring. A holding force for deep drawing the workpiece comprises an outer effect ring and an inner effect ring. The outer effect ring is loaded by sheet holding cylinders, and the inner effect ring is loaded by pressure pins and shaping pins.

Abstract: A filter press for reducing the water content in a starting material including a pressure chamber with a stationary lower plate and five hydraulically mobile chamber walls for applying pressure to the starting material.

Abstract: Veneer panels which are to be joined in a plurality of layers one above the other and one behind the other are assembled and glued to form an endless strand of veneer laminates. In the process, the veneer panels are first fed in through a glue-application machine which applies a layer of glue on a top side of the veneer panels onto a buffer belt. The veneer panels are then transferred from the buffer belt to a horizontally reversing feed belt which forms on a roller table a first veneer assembly comprising a plurality of veneer panels. The first veneer assembly is raised about its front end by an angle .alpha. into an oblique position so that veneer panels of a subsequent veneer assembly can be threaded into the first veneer assembly using the horizontally reversing feed belt. The first and subsequent veneer assemblies are thereby combined into a veneer-panel strand, and transferred to a continuously operating prepress and press.

Abstract: The invention relates to a method, a press, and a control device for reducing the capillary-bound water content in fiber cells of carbon-containing, finely comminuted solid materials and/or sludges. The method according to the invention includes rapidly raising the movable press plate of a filter press while the pressure chamber remains closed. A steam-coal dust mixture is formed due to the rapid expansion. At the same time, a first discharge lock is opened while the second discharge lock remains closed so that the exhaust steam flows in the direction of the controlled outlet valve. The exhaust steam can then be sent to a heat exchanger and then to another heat exchanger and, finally, may be reused for a subsequent operating cycle.

Abstract: Apparatus for reducing the water content of water-containing, granular brown coal under the action of thermal energy and pressure on the material (14) distributed flat in bed form using a press (9, 10) in which the brown coal is subjected to a mechanically applied initial surface pressure and which is furnished with orifices (21) for feeding steam (HD) which, supplying thermal energy to the brown coal, heats this, with condensation, and the hot water (HW) contained in the heated brown coal is expressed for use as a waste-heat source, a vessel (30) being provided for collecting the hot water (HW), from which vessel the hot water (HW) is passed to the orifices (21) in the press (9, 10), and which vessel is furnished with an inlet for the steam (HD) for expelling the hot water (HW).

Abstract: Water content which is bound by capillarity in fiber cells of carboniferous materials is reduced by a thermomechanical dewatering process. In the process, the carboniferous materials are conveyed by a dispersion box into a pressure chamber including upper and lower plates. Steam is applied to the materials introduced into the pressure chamber from both the upper and lower plates to heat the materials up to about 125.degree. C. and to release the water which is bound by capillarity in the fiber cells. Initially, the pressure within the chamber is maintained at no greater than the steam pressure. Subsequently, the pressure chamber is sealed gastight and the carboniferous materials in the pressure chamber are pressed using the upper and lower plates.

Abstract: A continuously operating press produces particle, fiber, plastic and wood boards continuously from pressing stock. The press includes a heating platen provided on one side of the press and a plurality of press platen segments arranged on a side opposite to the heating platen. The press platen segments are resiliently coupled to one another by snap-action hinges and the separation space between the press platen segments and the heating platen is independently adjusted. The pressing stock is pulled through the separation space which has been optimally controlled to produce boards with desired density profiles at a maximum production speed.

Abstract: A process and installation for the continuous production of boards of wood-based material, includes the steps of forming on a continuously moving scattering belt, a pressed material mat includes an initial mixture of chips and/or fibers from a scattering station and mixed with binder; precompacting and preheating the pressed material mat between the scattering station and a main pressing region; and bringing into an end form and curing the pressed material with the application of pressure and heat in a main pressing regions. The moisture level of the pressed material mat is less on entry into the main pressing region than the moisture level of the initial mixture in the scattering of the pressed material mat, part of the moisture imparted to it in the scattering being extracted again by hot-air preheating.

Abstract: A method for converting a board manufacturing plant from a discontinuous method of operation to a continuous one. A pre-assembly and trial start-up of the to-be-installed continuous press is performed at a close-by location during operation of the to-be-replaced press. An appropriate set-up area of sufficient floor strength is established close to the production hall, and the continuous press is designed to have vertical mechanical junctions for the transport of individual modules. These modules, being provided with assembly bridges and lifting devices, are transportable as units resistant to flexure and torsion.

Abstract: A fluted or honeycombed profile on the rear side of the pressing stock or rolling side of the heating/press platens, which profile enables an increased flexible, two-dimensional deformation, in a longitudinally and transversely controlled manner, in just a few seconds in the on-line control process while providing larger support spacings. The fluted profile along the whole of the pressing zone advantageously increases the elastic bending deformability in the transverse direction, while, as a result of the honeycombed profile, an increased flexibility longitudinally to the pressing zone is attained. As a result of the fluted profile longitudinally to the pressing zone, the two-dimensional, spherical flexibility of the press/heating platen is substantially increased, so that use is preferably made of this fluted profiling.

Abstract: A press with a window type tension frame. The frame has an upper and lower crosshead with two lateral tension shackles connected together to form the window type tension frame. The crossheads and the tension shackles are removably joined together by a clamping system that employs tension bolts.