Abstract: A high-speed hydraulic press of frame design, with press platen, crosshead and a press ram movable between these, for the forming, coating and pressing of large-surface pieces of material of small wall thickness made from plastic or plastic composite materials or of fiber-reinforced plastic boards into moldings, with a press ram which carries the upper mold half and which can be raised and lowered by means of a hydraulic rapid-motion arrangement for the idle stroke and a hydraulic short-stroke arrangement for the working storage.

Abstract: This invention discloses a continuously operating press having a pressing table, a pressing ram and flexible endless steel strips which are driven around the pressing table and pressing ram, respectively, and which draw the material to be pressed through the press. The press also has rolling bars which are disposed between the steel strips, and the pressing table and pressing ram, respectively. The rolling bars provide support to the steel strips and roll on roll platens which are attached to heated platens. The roll platens have surfaces which are heat treated and which have a precision ground finish and a Brinell hardness of 250.

Abstract: A continuously working press is provided wherein steel bands of at least 2 mm thickness are used, and the roller bars have a diameter of at least 20 mm, preferably 21 mm. The roller bars, at the end faces thereof, are mounted in guide chains driven by entry sprockets. The entry and feed sprockets, which are fixed on the same axis, of the table and press ram are controlled in a synchronized manner and, in each case with the same radius, enclose both the roller bars as well as the link sleeves or the protective rollers in such a way that the center axes of the top and bottom roller bars are in alignment with one another in the pressure direction.

Abstract: A continuous press is provided wherein the elastic forces are conducted centrically from the centering bolts into the vertical Y--Y axis and the longitudinal center of the guide chain. An accumulation of unilateral forces on the brackets of the guide chain is thereby avoided. The elastic forces, which are set up in the bearing bolts by the linear displacements of the rolling bars and are at times considerable, are thus conducted centrically into the guide sleeves and thus as a force centrically into the guide chain. The forces thus do not occur as an eccentric load on the guide chains and, consequently, are incapable of causing the destruction of the guide chains even with a relatively high load.

Abstract: A press is operable to form pressed materials such as fiberboard or chipboard. The press includes a press ram and a press platen facing one another to define a pressing region therebetween, and a plurality of rolling rods which support moving bands which draw the article through an entry region of the press and through the pressing region. An entry alignment device for the rolling rods includes first and second resilient pressure holding plates which impose a progressively increasing non-positive clamping force on the rolling rods as the rolling rods pass through the entry region, and first and second pilgrim-step mechanisms, each having a plurality of toothed members which are raised and lowered to periodically engage gaps formed between the rolling rods to impose a positive clamping force on the rods.

Abstract: A continuously working press is provided with a device which adjusts an entry gap in an entry region of a press ram to give the rolling rods of a press a sufficient degree of freedom for self-stabilization. The adjusting device includes an articulated crosshead anchored in said press frame and pivotable about an axis of rotation, a pressure holding plate located within said entry region and adjustable about an axis of rotation and which acts non-positively but resiliently on said rolling rods as they travel through the entry region, and a plurality of hydraulic supporting members located between the articulated crosshead and the pressure holding plate and which are adapted to act on said support device with a pressure profile that increases continuously towards said pressing region.

Abstract: A continuously working press is provided having a rolling rod conveyor connected to a guide chain, whereby in the critical entering arc and also in the tangential transition into the horizontal pressing zone the guide chain has the same arc dimension and secant dimension as the rolling rods, because they are guided coaxially with the same radius via entering gear wheels and lead-in gear wheels. Consequently, the orientation of the rolling rods orthogonal to the feeding direction is maintained. Furthermore, the rods are kept exactly equidistant during the transition from the entering arc into the horizontal pressing plane. Linear shifts are absorbed in an elastically compensating manner by bearing bolts composed of spring steel. The high spring forces which occur in the bearing bolts as a result of linear shifts of the rolling rods are absorbed in a compensating manner by thick sleeves and sextuple plate stacks of the guide chain.

Abstract: A collet surface structure is provided for a high-speed hydraulic press having collet interlock in order to eliminate leakage of oil into the clamping region. Furthermore, the formation of a harmful hydrostatic film thickness from the lubricating-oil film between the pressure rods and the collets is prevented, since the oil is immediately forced away due to the high clamping pressure between the clamping faces. These high clamping pressures result from the extremely short space of the lubricating-oil elimination grooves and the large capacity of the grooves. Thus, the oil-eliminating grooves are made large enough to eliminate reliably a hydrostatic oil film of at least 0.1 mm. This regularity is independent of the clamping diameter of the collet.

Abstract: A press apparatus is provided wherein the vacuum suction lifters, due to a swing-in movement, can be moved more quickly into the lifting position for attaching the finish-coated panel by suction and, due to the telescopic extension, can be accurately set to the statically best longitudinal positions for panels of various widths. By a positioning and drive device, rolling belt trays used according to the invention can be moved accurately at various positions into the press area in conformity with different panel widths. As a result of the construction members and measures according to the invention, the movable parts have been further reduced in weight, thereby permitting faster movements. Furthermore, this results in higher flexibility and greater operational readiness of the short-cycle installation when changing over to other panel widths.

Abstract: A laminated wood panel manufacturing device is provided for use with daylight presses. A pressure strip is arranged in a longitudinal direction of the press. Parallel upper and lower lids are attached to the pressure strip and extend in a transverse direction toward the press. The lids are vertically adjustable by means of adjusting screws. The pressure strip assembly is moved in a transverse direction of the press so that, during pressing, the upper and lower lids abut upper and lower board layers of a laminated stack to press the board layers together in a transverse direction of the press.

Abstract: A continuously working press is provided having a rolling rod conveyor connected to a guide chain, whereby in the critical entering arc and also in the tangential transition into the horizontal pressing zone the guide chain has the same arc dimension and secant dimension as the rolling rods, because they are guided coaxially with the same radius via entering gear wheels and lead-in gear wheels. Consequently, the orientation of the rolling rods orthogonal to the feeding direction is maintained. Furthermore, the rods are kept exactly equidistant during the transition from the entering arc into the horizontal pressing plane. Linear shifts are absorbed in an elastically compensating manner by bearing bolts composed of spring steel. The high spring forces which occur in the bearing bolts as a result of linear shifts of the rolling rods are absorbed in a compensating manner by thick sleeves and sextuple plate stacks of the guide chain.

Abstract: A heated platen press of window frame-like construction is disclosed for producing particle boards, fiber boards or the like. The press comprises, a fixed press table in a press frame and a press ram which may be raised and lowered. Heatable platens are attached to the press table and to the press ram. Spacers which may be inserted or removed within the frame are provided for shortening the effective pressing stroke of short-stroke cylinders.

Abstract: The invention relates to a precompaction belt for continuously operating belt-type prepresses for compacting preshaped sections from the particle mat passing through on a conveyor belt to produce particle boards, etc. The belt comprises a core of textile cord fabric with smooth outer PVC layers and with perforations at predetermined spacing.

Abstract: A pressure equalizing pad for presses with heated plates for the production of compacts, laminates, etc. has a press stand with a movable ram. An upper pressure plate is attached to the ram and a bed-pressure plate is positioned on a press bed with a hydrostatic pressure pad thereon. The hydrostatic pressure pad includes a thin steel sheet floatingly maintained by an oil medium, a flexible edge seal between the steel sheet and the bed-pressure plate, as well as rings and gaskets to form the improved device.

Abstract: An injection press for forming a mass of plastic material to a desired shape comprising a die carrier plate for supporting a mold having an injection channel formed therein at a location corresponding substantially to the location of the optimum injection point, said die carrier plate having a plurality of bores therethrough arrayed in an X-Y coordinate field; a press plate parallel to said die carrier plate and having a plurality of bores therethrough aligned with the bores in said die carrier plate in said X-Y coordinate field; means interposed between said die carrier plate and said press plate for injecting plastic material into a mold; a closing rod extendable through a pair of aligned bores in said die carrier plate and said press plate, through said interposed injecting means and through the injection channel of a mold on said die carrier plate to force plastic material into the mold; said injection means and said closing rod being selectively positionable in said X-Y coordinate field so that the closi

Abstract: Apparatus for changing press cauls of a heated press used for fabricating a finished board. A plurality of rods having mandrels are arranged adjacent the longitudinal sides of said cauls and removably positioned in a corresponding plurality of receiving loops secured to each caul. The cauls may then be moved vertically with respect to their platens. Clamps are used to secure each caul to their respective platens. Conveyor belts are used to insert a new caul pack into the press after removal of the old cauls. The conveyor belts are secured to a plurality of arms having suction pickup means and holders used to remove a protective intermediate layer between the cauls for completing the insertion operation.

Abstract: The press includes a press table, a tup mounted with respect to the press table to define a press gap for receiving material to be pressed. An endless conveyor band is disposed around each of the table and the tup for conveying the material to be pressed into the press gap. Each conveyor band is mounted by a plurality of rolls. The rolls are mounted to counter supports which comprise a plurality of change plates. The change plates contain roll bearings which mount the rolls. The change plates also contain a heating apparatus and cooling apparatus and are capable of being mounted to and removed from the table and the tup. Each change plate comprises at least one rod mounted on a first level through a roll bearing and through a web plate. Each web plate is attached on a second level to a pressure plate through a connecting rod. In this manner, the counter pressure of the material being pressed is transferred to the pressure plates and can be distributed over a wider area.

Abstract: An injection press comprises a machine base and a machine bed which is lower than the machine base. A mold closure unit which contains a mold as one wall constructed to support the closure unit horizontally on an upper surface of the machine base. A bracket is pivotally attached between the mold closure unit and the machine bed and is of such a length to permit the closure unit to slide between first and second positions on the machine base. Means are provided for securing the bracket to the machine base when the closure unit is in the first position such that the closure unit may be pivoted upright while being supported by the bracket.

Abstract: Apparatus for feeding a laminate pack into a press and for discharging the finished product such as a laminated, finished board. A plurality of lifters and holders arranged on support arms are provided along the longitudinal edge of the finished board to remove it from the press. These same support arms carry conveyors to transport the laminate pack into the press at the same time or before the finished board is discharged. Fast operating cycles are obtained by reducing the feeding and discharge operating times.

Abstract: The press contains a platen and a ram adjustably mounted with respect to the platen to define a press gap for receiving material. A first conveyor band is disposed around the platen and a second conveyor band is disposed around the ram. A plurality of rolls for supporting and guiding the first and second bands are mounted to the platen and ram, respectively. Countersupports are provided for the rolls. The countersupports comprise a plurality of change plates, each of which is capable of being mounted to and removed from a platen or ram. Each change plate includes a first rod mounted in a first level and connected in supporting relation with one of the rolls. A plurality of T-shaped web plates are connected to the first rod in the first level and to a pressure plate in a second level whereby counter-pressure from the material being pressed is transferred to the pressure plate.