CA2198052A1 - Process and device for charging and discharging of short-stroke presses - Google Patents
Process and device for charging and discharging of short-stroke pressesInfo
- Publication number
- CA2198052A1 CA2198052A1 CA002198052A CA2198052A CA2198052A1 CA 2198052 A1 CA2198052 A1 CA 2198052A1 CA 002198052 A CA002198052 A CA 002198052A CA 2198052 A CA2198052 A CA 2198052A CA 2198052 A1 CA2198052 A1 CA 2198052A1
- Authority
- CA
- Canada
- Prior art keywords
- pressing
- grab
- suction apparatus
- press
- numerically controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/22—Charging or discharging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
- B29C31/08—Feeding of the material to be moulded, e.g. into a mould cavity of preforms to be moulded, e.g. tablets, fibre reinforced preforms, extruded ribbons, tubes or profiles; Manipulating means specially adapted for feeding preforms, e.g. supports conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/32—Discharging presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C2037/90—Measuring, controlling or regulating
Abstract
The invention refers to a process and a device for charging, and discharging, layered material for pressing into, and out of, short-stroke presses, with a carriage provided with grab and suction apparatus travelling between the coating table, the press and depositing table. In order to shorten the rest intervals when there is no pressing and the pressing periods the invention is characterized by the following features: a) the carriage with the material for pressing is moved with high acceleration and at high speed towards the pressing chamber by a numerically controlled (NC) electric motor, while the return travel to the coating table and the simultaneous setting up travel of the suction apparatus to the pressing chamber takes place at a slower speed, b) the working strokes for inward and outward travel and the working strokes T and Z for lowering the grab and suction apparatus are each actuated reversibly and independently of one another by a numerically controlled central electrical drive, and c) the numerically controlled speed curves, the vertical closing and opening movements H of the press, the horizontal linear translational movements T of the grab and suction apparatus and the descending movement Z of the suction apparatus are coordinated/linked in a computer, so that by scanning the positions at any given time the paths of all four movements L, H, T and Z can be controlled by the computer in an operating cycle which is interruption-free and in which they overlap one another.
Description
2198~52 .
PROCESS AND DEVICE FOR CHARGING AND DISCHARGING
OF SHORT-STROKE PRESSES
The invention relates to a process for the charging and discharging of short-stroke presses. The invention also relates to a device for executing such a process.
A process of this kind with corresponding equipment is known from DE-PS 23 63 795. According to the this reference, a variety of mechanical kinematic elements are used for the translational movements for depositing of the material for pressing by means of grab apparatus when the press is charged and for conveying the discharging apparatus into the press to pick up the finished pressed board, the consequence of the separate control functions being that the mechanical assembly has a larger number of different functional parts and therefore is not only more complicated but also, because it is more liable to break down, is in greater need of servicing and is overall more expensive to operate.
The charging and discharging apparatus of short-stroke presses operates in accordance with DE-PS 28 47 273 and DE-PS
32 46 720, the grab terminals and the suction cleats being operated in turn with the same parallelogram control system.
The control arms, which can be swung out are driven, usually pneumaticallyO The control arms which can be swung out, usually pneumatically, follow a sinusoidal path and in consequence the acceleration cycles and braking processes can no longer be reproduced accurately with partly additional dampers in the terminal positions for deposit and reception of the material for pressing. This is particularly true when format widths vary with effects on the paths and operational speeds, especially during transverse movements in the required millisecond range. A further disadvantage of these swing-arm systems is that levers must be longer and therefore working load capacities must be greater to permit adjustments for greater differences in format width.
Because of the sine-function of the mechanical drives for the grab and suction components the systems in accordance with the previously known patents DE-GM 93 02 192 and DE-PS 35 03 156 suffer from the same disadvantage. In order to bridge greater differences in format widths DE-PS 35 03 156 supports the parallelogram control levers with additional translational spars that swing in and out and in turn elevate the masses to be moved for the carriage used for charging and discharging, 5 which prevents faster movement. The forced coupling of the lever gear according to DE-GM 93 02 192 also makes it impossible to shorten the rest interval any further in comparison to the closing movement.
The grab and suction kinematics operate in accordance o with the state of the technology, the pressing stroke of the upper ram being scanned electrically. If sufficient free space is available the aspirator is swung in from the side.
When the swing-in movement has terminated it in turn is scanned electrically, so that the aspirator is lowered and the 15 board is then lifted. When the board has been lifted this in turn is scanned electrically, so that after this signal the carriage is conveyed out of the press. With this procedure, charging and discharging times for a press measuring 5.2 m in length are about 12 seconds, being determined essentially by 20 the time required for scanning and switching of successive operating steps.
The purpose of the invention is to outline a process whereby the charging and discharging kinematics for the material for pressing and of the finished board can in 25 coordination be improved for the closing process of the press so as to achieve a perceptible and interruption-free decrease in the rest intervals when there is no pressing and in the pressing times and to use such kinematics to provide a device in which the masses to be moved can be reduced and the 30 mechanical charging and discharging times, i.e. the overall production times can be shortened in consequence.
According to one aspect of the invention, there is provided a process for charging and discharging short-stroke presses with layered material for pressing which consists of 35 load-bearing boards with hardening layers above and below of hardenable synthetic resin or hardenable synthetic resin film, a movable carriage being provided between the coating table, 2198~52 the press and the depositing table with grab and suction apparatus; the grab apparatus grasps the material for pressing on both its longitudinal edges and can be conveyed into the pressing chamber and out of it when the material is deposited and after the subsequent pressing process and the opening of the press the finished board is vacuumed on both its longitudinal edges by the suction apparatus conveyed into the press, lifted and moved out of the press, characterized by the following features: a) the carriage with the material for o pressing is conveyed towards the pressing chamber by a numerically controlled electric motor at high acceleration and at high speed, while the return travel to the coating table and the simultaneous setting-up travel of the suction apparatus to the pressing chamber take place in a slower travel mode, b) the working strokes for inward and outward travel and the T and Z strokes for lowering the grab and suction apparatus are powered in turn reversibly and independently of one another by a numerically controlled central electrical drive, and c) a computer is used to coordinate/link the numerically controlled speed profiles between the vertical closing and opening movements H of the press (pressing stroke) numerically controlled and set by the absolute motion pickup as well as the horizontal linear translational movements T of the grab and suction apparatus and the descending movement Z of the suction apparatus so that by scanning the given path positions (XO, Xl, X2, X3, Yo, Yl ~ Y2 Y3) and the speed gradients all four movements L, H, T and Z
can be controlled by the computer in a working cycle in which they are interruption-free and overlap one another.
According to another aspect of the invention, there is provided a device for charging and discharging short-stroke presses with a carriage which can be moved between a coating table, a press and a depositing table, the carriage having on each of its longitudinal sides grab apparatus and suction apparatus for handling the material for pressing and the finished board, for the purpose of executing the process as described above, such that the grab and suction apparatus consist of linearly mobile charging and discharging telescopic arms equipped with modular handling tools, which are powered reversibly and independently of one another by a numerically controlled central drive shaft, and the charging and 5 discharging telescopic arms are designed with one or more modularly assembled telescopic slides which can be slid into one another.
The process in accordance with the invention and the device in accordance with the invention have the following o advantages over the state of the technology.
By coordinating the numerically controlled speed gradients (profiles) between the vertical closing/opening movement for the press stroke H and the horizontal translational movement T of the telescopic arms it is possible 15 not only to control overlapping paths of movement without interruption by scanning the positions and speed gradients but also to display them visually through the computer. The linear movement of the masses fulfils the condition for quiet smooth operation at the required high operating speeds, 20 instead of swing-arm systems being used to accelerate the masses up to the square of their speed. The electromechanical variable-speed drive for the grab and suction apparatus operating via a common numerically controlled shaft makes it possible to set an absolutely smooth movement for the grab and 25 suction apparatus by means of accurate speed profiles, thereby permitting short acceleration and braking times and overall travel at a higher speed plateau. The electromotive numerically controlled central drive of the telescopic arms makes it easier to assemble the reverse operating system, so 30 that shorter acceleration and braking times and consequently a higher overall speed of travel and shorter charging and discharging times can be achieved. As a result, given a length of material for pressing of 5.2 m, for example, the currently usual charging and discharging times can be reduced 35 from about 12 seconds to 9 seconds. Because there is no interference with the coordination of the closing and opening movements with the translational movements of the telescopic arms the rest interval can be shortened from the current 2.5 to 2 seconds to about one second. As the hardening reaction of the resins in the production routine for extruding resin-soaked film with chipboard or fibreboard is in a ratio of about 8:1 to 10:1 to the rest interval when there is no pressing the pressing time can be reduced by about 10 seconds.
To sum up, the shorter charging and discharging times and pressing times reduce the currently usual production times by about one third. Because of the digital control and setting o of the paths of movement in the X- and Y-co-ordinates the rest intervals are always exactly equal, and therefore in addition to the economic advantage of the shorter production time uniform surface quality is always achieved. The same modular units are used for the grab sector "charging" and the suction sector "discharging", and this, by standardizing, holds out the prospect of economical assembly and simpler, more readily understandable servicing of this dynamically high-loaded system.
Additional practical embodiments of the invention will become apparent from the following description of the drawings, in which:
Figure 1 is a schematic plan of the charging and discharging mechanisms of the process in accordance with the invention with a speed path diagram;
Figure 2 is a cross-section I-I from Figure 1 showing the grab apparatus with the carriage before the material for pressing is deposited on the lower pressure plate;
Figure 3 is a cross-section of a telescopic arm with double extension;
3c Figure 4 shows the telescopic arm as in Figure 3 in cross-section A-A and in elevation;
Figure 5 is a cross-section I-I as in Figure 1, the suction apparatus instead of the grab apparatus functioning with two functioning diagrams;
Figure 6 shows the grab apparatus as in Figure 2 with two diagrams during return travel after the material for pressing has been deposited;
219805~
PROCESS AND DEVICE FOR CHARGING AND DISCHARGING
OF SHORT-STROKE PRESSES
The invention relates to a process for the charging and discharging of short-stroke presses. The invention also relates to a device for executing such a process.
A process of this kind with corresponding equipment is known from DE-PS 23 63 795. According to the this reference, a variety of mechanical kinematic elements are used for the translational movements for depositing of the material for pressing by means of grab apparatus when the press is charged and for conveying the discharging apparatus into the press to pick up the finished pressed board, the consequence of the separate control functions being that the mechanical assembly has a larger number of different functional parts and therefore is not only more complicated but also, because it is more liable to break down, is in greater need of servicing and is overall more expensive to operate.
The charging and discharging apparatus of short-stroke presses operates in accordance with DE-PS 28 47 273 and DE-PS
32 46 720, the grab terminals and the suction cleats being operated in turn with the same parallelogram control system.
The control arms, which can be swung out are driven, usually pneumaticallyO The control arms which can be swung out, usually pneumatically, follow a sinusoidal path and in consequence the acceleration cycles and braking processes can no longer be reproduced accurately with partly additional dampers in the terminal positions for deposit and reception of the material for pressing. This is particularly true when format widths vary with effects on the paths and operational speeds, especially during transverse movements in the required millisecond range. A further disadvantage of these swing-arm systems is that levers must be longer and therefore working load capacities must be greater to permit adjustments for greater differences in format width.
Because of the sine-function of the mechanical drives for the grab and suction components the systems in accordance with the previously known patents DE-GM 93 02 192 and DE-PS 35 03 156 suffer from the same disadvantage. In order to bridge greater differences in format widths DE-PS 35 03 156 supports the parallelogram control levers with additional translational spars that swing in and out and in turn elevate the masses to be moved for the carriage used for charging and discharging, 5 which prevents faster movement. The forced coupling of the lever gear according to DE-GM 93 02 192 also makes it impossible to shorten the rest interval any further in comparison to the closing movement.
The grab and suction kinematics operate in accordance o with the state of the technology, the pressing stroke of the upper ram being scanned electrically. If sufficient free space is available the aspirator is swung in from the side.
When the swing-in movement has terminated it in turn is scanned electrically, so that the aspirator is lowered and the 15 board is then lifted. When the board has been lifted this in turn is scanned electrically, so that after this signal the carriage is conveyed out of the press. With this procedure, charging and discharging times for a press measuring 5.2 m in length are about 12 seconds, being determined essentially by 20 the time required for scanning and switching of successive operating steps.
The purpose of the invention is to outline a process whereby the charging and discharging kinematics for the material for pressing and of the finished board can in 25 coordination be improved for the closing process of the press so as to achieve a perceptible and interruption-free decrease in the rest intervals when there is no pressing and in the pressing times and to use such kinematics to provide a device in which the masses to be moved can be reduced and the 30 mechanical charging and discharging times, i.e. the overall production times can be shortened in consequence.
According to one aspect of the invention, there is provided a process for charging and discharging short-stroke presses with layered material for pressing which consists of 35 load-bearing boards with hardening layers above and below of hardenable synthetic resin or hardenable synthetic resin film, a movable carriage being provided between the coating table, 2198~52 the press and the depositing table with grab and suction apparatus; the grab apparatus grasps the material for pressing on both its longitudinal edges and can be conveyed into the pressing chamber and out of it when the material is deposited and after the subsequent pressing process and the opening of the press the finished board is vacuumed on both its longitudinal edges by the suction apparatus conveyed into the press, lifted and moved out of the press, characterized by the following features: a) the carriage with the material for o pressing is conveyed towards the pressing chamber by a numerically controlled electric motor at high acceleration and at high speed, while the return travel to the coating table and the simultaneous setting-up travel of the suction apparatus to the pressing chamber take place in a slower travel mode, b) the working strokes for inward and outward travel and the T and Z strokes for lowering the grab and suction apparatus are powered in turn reversibly and independently of one another by a numerically controlled central electrical drive, and c) a computer is used to coordinate/link the numerically controlled speed profiles between the vertical closing and opening movements H of the press (pressing stroke) numerically controlled and set by the absolute motion pickup as well as the horizontal linear translational movements T of the grab and suction apparatus and the descending movement Z of the suction apparatus so that by scanning the given path positions (XO, Xl, X2, X3, Yo, Yl ~ Y2 Y3) and the speed gradients all four movements L, H, T and Z
can be controlled by the computer in a working cycle in which they are interruption-free and overlap one another.
According to another aspect of the invention, there is provided a device for charging and discharging short-stroke presses with a carriage which can be moved between a coating table, a press and a depositing table, the carriage having on each of its longitudinal sides grab apparatus and suction apparatus for handling the material for pressing and the finished board, for the purpose of executing the process as described above, such that the grab and suction apparatus consist of linearly mobile charging and discharging telescopic arms equipped with modular handling tools, which are powered reversibly and independently of one another by a numerically controlled central drive shaft, and the charging and 5 discharging telescopic arms are designed with one or more modularly assembled telescopic slides which can be slid into one another.
The process in accordance with the invention and the device in accordance with the invention have the following o advantages over the state of the technology.
By coordinating the numerically controlled speed gradients (profiles) between the vertical closing/opening movement for the press stroke H and the horizontal translational movement T of the telescopic arms it is possible 15 not only to control overlapping paths of movement without interruption by scanning the positions and speed gradients but also to display them visually through the computer. The linear movement of the masses fulfils the condition for quiet smooth operation at the required high operating speeds, 20 instead of swing-arm systems being used to accelerate the masses up to the square of their speed. The electromechanical variable-speed drive for the grab and suction apparatus operating via a common numerically controlled shaft makes it possible to set an absolutely smooth movement for the grab and 25 suction apparatus by means of accurate speed profiles, thereby permitting short acceleration and braking times and overall travel at a higher speed plateau. The electromotive numerically controlled central drive of the telescopic arms makes it easier to assemble the reverse operating system, so 30 that shorter acceleration and braking times and consequently a higher overall speed of travel and shorter charging and discharging times can be achieved. As a result, given a length of material for pressing of 5.2 m, for example, the currently usual charging and discharging times can be reduced 35 from about 12 seconds to 9 seconds. Because there is no interference with the coordination of the closing and opening movements with the translational movements of the telescopic arms the rest interval can be shortened from the current 2.5 to 2 seconds to about one second. As the hardening reaction of the resins in the production routine for extruding resin-soaked film with chipboard or fibreboard is in a ratio of about 8:1 to 10:1 to the rest interval when there is no pressing the pressing time can be reduced by about 10 seconds.
To sum up, the shorter charging and discharging times and pressing times reduce the currently usual production times by about one third. Because of the digital control and setting o of the paths of movement in the X- and Y-co-ordinates the rest intervals are always exactly equal, and therefore in addition to the economic advantage of the shorter production time uniform surface quality is always achieved. The same modular units are used for the grab sector "charging" and the suction sector "discharging", and this, by standardizing, holds out the prospect of economical assembly and simpler, more readily understandable servicing of this dynamically high-loaded system.
Additional practical embodiments of the invention will become apparent from the following description of the drawings, in which:
Figure 1 is a schematic plan of the charging and discharging mechanisms of the process in accordance with the invention with a speed path diagram;
Figure 2 is a cross-section I-I from Figure 1 showing the grab apparatus with the carriage before the material for pressing is deposited on the lower pressure plate;
Figure 3 is a cross-section of a telescopic arm with double extension;
3c Figure 4 shows the telescopic arm as in Figure 3 in cross-section A-A and in elevation;
Figure 5 is a cross-section I-I as in Figure 1, the suction apparatus instead of the grab apparatus functioning with two functioning diagrams;
Figure 6 shows the grab apparatus as in Figure 2 with two diagrams during return travel after the material for pressing has been deposited;
219805~
Figure 7 is a cutaway elevation of the carriage with two telescopic arms and lowering mechanism; and Figure 8 is a cutaway as in Figure 7 with another lowering mechanism.
In the drawings, the press 9 is equipped with charging and discharging mechanisms designed as grab and suction apparatus for pressing chipboard, fibreboard and the like as material 4 under pressure from a pressure cylinder 46 and subject to heat from heated pressure plates 38 and 54 into o hardened boards 49 with layers of hardener applied to the top and underside. For charging and discharging the press 9 a carriage 1 is provided, guided by wheels 51 on tracks 52 and travelling between the coating table 48 and the press 9 and between the press 9 and the depositing table 50, and having attached to each of its longitudinal sides grab and suction apparatus. While the grab apparatus grasps the material for pressing 4 on both its longitudinal sides on the coating table 48 and conveys it into the press 9 and deposits it on the lower pressure plate 54 the suction apparatus 6 is located in the vicinity of the depositing table 50 when the finished hardened board 49 is deposited from the previous pressing cycleO
Figure 1 shows the carriage 1 used for both charging and discharging on which the telescopic arms 2 are positioned.
These telescopic arms 2 have on their inner front surface 3 facing the material for pressing 4 gripping surfaces for assembling which receive the handling tools such as the grabs 5 (terminals) and aspirators 6. The embodiment of the telescopic arms 2 is the same for the grab sector 7 (charging sector) and the suction sector 8 (discharging sector) so that these parts are physically interchangeable. Figure 1 shows, in addition, the carriage 1 with the charging assembly 7 in position after it has been conveyed into the press 9. Through the travel stroke L the carriage is conveyed under control by means of the numerically controlled motors 10. The carriage 1 is connected to the drive shaft 32 by means of the toothed belt 33 or chains. As shown in the diagram in Figure 1 the - 2198û52 carriage 1 is conveyed at high acceleration from the starting point 11 to the terminal point 12 by the travel stroke L, this high-speed passage being marked on the diagram as fast travel mode 13. The return travel to the material set-up point 30 takes place when the press 9 is closed in slow travel mode 35 from the terminal point 12 to the starting point 11. Figures 2 and 6 show the telescopic arm 2 in cross-section I-I from Figure 1 with the grab 5 extended in the given operation positions and adjusted to varying format widths B1 or B2.
o Figure 5 shows the aspirator 6 with the telescopic arm 2 in the cross-section I-I from Figure 1 in the waiting position 36 and extended in the given operating positions with the aspirator still in the raised position over the finished board 49.
The functional assembly of the telescopic arms 2 is shown in Figure 3. The telescopic arms 2 of the grab sector 7 and the suction sector 8 (as in Figure 1) are powered in turn reversibly and independently of each other by a numerically controlled central drive shaft 14 and 15. The drive is provided electrically by numerically controlled motors 16 and 17. Figure 3 also shows by way of example a doubly extended telescopic arm 2 with the telescope slides 19 and 25. It ~an moreover be designed to have multiple extension for longer paths of travel. The single extension 19 is only for short paths of travel, e.g. when the usual format width is only B1.
When the telescopic arm 2 has single extension it is designed to have the toothed belt 18 driven by the central shaft 14 or 150 In this case the first telescopic slide 19 is connected to the toothed belt 18 by a coupling 20. In the embodiment with double extension a toothed belt 21 is similarly positioned in the telescopic slide 19 between two guide rollers 22 and in turn connected firmly via the fixed point 23 to the chassis 24. The second telescopic slide 25 is firmly connected to the second toothed belt 21 by means of a second coupling 26 so that the second toothed belt 21 is driven by the first toothed belt 18. As Figure 4 shows the second telescopic slide 25 is supported against the first telescopic -slide 19 by a roller guide 27 and the first slide 19 in turn is supported horizontally against the chassis 24 via the roller guide 28 so that the vertical load 29 of the grab and suction tools 5 and 6 including the weight of the material for 5 pressing is absorbed. As a result of coupling the toothed belts 18 and 21 and the telescopic guides 19 and 25 to one another a horizontal reverse movement necessarily occurs after each alternate revolution of the shaft 14 and 15.
The operation of the working cycle, shown o diagrammatically in Figures 1, 5, 6 and 7, is as follows: The numerically controlled electromotive working strokes "L", "T"
and "Z" for the carriage 1, the telescopic arms 2 for the grab 5 and aspirator 6 and the vertical movement of the carriage for the aspirator 6 and the hydraulic stroke "H" numerically 15 controlled and set by means of the absolute motion pickup 37 are linked in the computer in such a way that all four movements take place within a working cycle not successively but overlapping one another. During the pressing process the carriage 1 is conveyed in slow travel mode 35 with the suction 20 sector 8 into the press 9. The aspirators 6 stand in the waiting position 36 (Figure 5) with the telescopic arms 2 folded together. When the pressure plate 38 (Figure 5) is opened by the pull-back cylinder (not shown) the pre-programmed speed profile 39 is scanned via the pressing stroke 25 "H", i.e. the given position on the path and the speed are recorded by the absolute motion pickup 37. At the path position Y1 the aspirators 6 are conveyed from their waiting position 36 along the centre line of the press 9 via the telescopic arm stroke "T" in accordance with the inputted 30 speed profile 40. If the speed curve 39 deviates from the setting between path points Yl and Y2 the translational movement of the aspirators 6 is stopped immediately. If the set speed is maintained the aspirators 6 pass the pressure plate 38 underneath the path segment Y (Figure 5). If no 35 deviation from the setting has been found by analogy to the speed profile 40 of the incoming aspirators 6 at path point X
the discharging apparatus with the aspirators 6 is lowered in 2lssas2 response to the stroke "Z" (Figure 7) at a timed rest interval by means of an electrical numerically controlled servomotor 41 and a swivelling leverbar 42 (Figures 7 and 8) driven via the toothed belt 34 or the toothed racks 53 in such a manner that 5 shortly after the end of the travel stroke "T" at the terminal point 43 the aspirators 6 are set down on the finished pressed board 49 and are vacuuming it. The swivelling movement over the arc 31 (Figure 7) is actuated by the servomechanism 41/42 once again via a speed profile which can be read in o numerically. After the servomechanism 41/42 has lifted the finished board 49 via stroke "Z" the carriage 1 is conveyed out of the press 9 via the travel stroke "L" at high speed in fast travel mode in conformity with the control curve 13 and conveyed into the press 9 with the grab sector 7. The 15 servomotor 41 can be used at the same time to control the distance "Z" which always uniformly matches the varying thicknesses P of the material for pressing (Figure 7). At the end of the travel stroke "L" i.eO at the terminal point 12 the grabs 5 are opened in the extended telescopic arm position 45 and conveyed back at high speed in conformity with the speed profile 44 (Figure 6), that is, out of the pressure plate sector. At path position X0 the closing movement of the pressure plate 38 is started and scanned by the absolute motion pickup 37 in accordance with the speed curve 39. If a 25 deviation from the setting of the speed profile of the speed curves 44 and 39 between path positions X0 through X2 and Y0 through Y3 iS detected in the coordinating computer the closing movement is stopped by the controllable rapid shutoff valve 47~ If the speed coordinates X and Y agree the pressure plate 30 38 passes without hindrance the position X2 cleared by the telescopic arms 2.
_ Legend of Reference Numerals 1. Carriage 17. Numerically controlled motor 2. Telescopic arm 18. Toothed belt 3. Front surface of telescopic arm 19. Telescopic slide 4. Material for pressing 20. Coupling 5. Terminals, grab 21. Toothed belt 6. Aspirator 22. Guide rollers 7. Grab sector 23. Fixed point 80 Suction sector 24. Chassis 90 Press 25. Telescopic slide lOo Motors (NC) 26. Coupling 11. Starting point 27. Roller guides 19, 25 12. Terminal point 28. Roller guides 19, 25 130 Fast travel mode 29. Vertical load 14. Drive shaft 30. Material set-up point 15. Drive shaft 31. Arc 16. Numerically controlled 32. Drive shaft motor 2198~52 33. Toothed belt (chains) 50. Depositing table 34. Toothed belt drive 51. Wheels 35. Slow travel mode 52. Tracks 36. Waiting position 53. Toothed rack drive 37. Absolute motion pickup 54. Lower pressure plates 38. Upper pressure plate 39. Speed curve 40. Speed curve 41. Servomotor 420 Leverbar 43. Terminal point 44. Speed curve 45. Telescopic arm 460 Pressure cylinder pistons, setup in press 47. Rapid shutoff valve 48. Coating table 49. Extruded board
In the drawings, the press 9 is equipped with charging and discharging mechanisms designed as grab and suction apparatus for pressing chipboard, fibreboard and the like as material 4 under pressure from a pressure cylinder 46 and subject to heat from heated pressure plates 38 and 54 into o hardened boards 49 with layers of hardener applied to the top and underside. For charging and discharging the press 9 a carriage 1 is provided, guided by wheels 51 on tracks 52 and travelling between the coating table 48 and the press 9 and between the press 9 and the depositing table 50, and having attached to each of its longitudinal sides grab and suction apparatus. While the grab apparatus grasps the material for pressing 4 on both its longitudinal sides on the coating table 48 and conveys it into the press 9 and deposits it on the lower pressure plate 54 the suction apparatus 6 is located in the vicinity of the depositing table 50 when the finished hardened board 49 is deposited from the previous pressing cycleO
Figure 1 shows the carriage 1 used for both charging and discharging on which the telescopic arms 2 are positioned.
These telescopic arms 2 have on their inner front surface 3 facing the material for pressing 4 gripping surfaces for assembling which receive the handling tools such as the grabs 5 (terminals) and aspirators 6. The embodiment of the telescopic arms 2 is the same for the grab sector 7 (charging sector) and the suction sector 8 (discharging sector) so that these parts are physically interchangeable. Figure 1 shows, in addition, the carriage 1 with the charging assembly 7 in position after it has been conveyed into the press 9. Through the travel stroke L the carriage is conveyed under control by means of the numerically controlled motors 10. The carriage 1 is connected to the drive shaft 32 by means of the toothed belt 33 or chains. As shown in the diagram in Figure 1 the - 2198û52 carriage 1 is conveyed at high acceleration from the starting point 11 to the terminal point 12 by the travel stroke L, this high-speed passage being marked on the diagram as fast travel mode 13. The return travel to the material set-up point 30 takes place when the press 9 is closed in slow travel mode 35 from the terminal point 12 to the starting point 11. Figures 2 and 6 show the telescopic arm 2 in cross-section I-I from Figure 1 with the grab 5 extended in the given operation positions and adjusted to varying format widths B1 or B2.
o Figure 5 shows the aspirator 6 with the telescopic arm 2 in the cross-section I-I from Figure 1 in the waiting position 36 and extended in the given operating positions with the aspirator still in the raised position over the finished board 49.
The functional assembly of the telescopic arms 2 is shown in Figure 3. The telescopic arms 2 of the grab sector 7 and the suction sector 8 (as in Figure 1) are powered in turn reversibly and independently of each other by a numerically controlled central drive shaft 14 and 15. The drive is provided electrically by numerically controlled motors 16 and 17. Figure 3 also shows by way of example a doubly extended telescopic arm 2 with the telescope slides 19 and 25. It ~an moreover be designed to have multiple extension for longer paths of travel. The single extension 19 is only for short paths of travel, e.g. when the usual format width is only B1.
When the telescopic arm 2 has single extension it is designed to have the toothed belt 18 driven by the central shaft 14 or 150 In this case the first telescopic slide 19 is connected to the toothed belt 18 by a coupling 20. In the embodiment with double extension a toothed belt 21 is similarly positioned in the telescopic slide 19 between two guide rollers 22 and in turn connected firmly via the fixed point 23 to the chassis 24. The second telescopic slide 25 is firmly connected to the second toothed belt 21 by means of a second coupling 26 so that the second toothed belt 21 is driven by the first toothed belt 18. As Figure 4 shows the second telescopic slide 25 is supported against the first telescopic -slide 19 by a roller guide 27 and the first slide 19 in turn is supported horizontally against the chassis 24 via the roller guide 28 so that the vertical load 29 of the grab and suction tools 5 and 6 including the weight of the material for 5 pressing is absorbed. As a result of coupling the toothed belts 18 and 21 and the telescopic guides 19 and 25 to one another a horizontal reverse movement necessarily occurs after each alternate revolution of the shaft 14 and 15.
The operation of the working cycle, shown o diagrammatically in Figures 1, 5, 6 and 7, is as follows: The numerically controlled electromotive working strokes "L", "T"
and "Z" for the carriage 1, the telescopic arms 2 for the grab 5 and aspirator 6 and the vertical movement of the carriage for the aspirator 6 and the hydraulic stroke "H" numerically 15 controlled and set by means of the absolute motion pickup 37 are linked in the computer in such a way that all four movements take place within a working cycle not successively but overlapping one another. During the pressing process the carriage 1 is conveyed in slow travel mode 35 with the suction 20 sector 8 into the press 9. The aspirators 6 stand in the waiting position 36 (Figure 5) with the telescopic arms 2 folded together. When the pressure plate 38 (Figure 5) is opened by the pull-back cylinder (not shown) the pre-programmed speed profile 39 is scanned via the pressing stroke 25 "H", i.e. the given position on the path and the speed are recorded by the absolute motion pickup 37. At the path position Y1 the aspirators 6 are conveyed from their waiting position 36 along the centre line of the press 9 via the telescopic arm stroke "T" in accordance with the inputted 30 speed profile 40. If the speed curve 39 deviates from the setting between path points Yl and Y2 the translational movement of the aspirators 6 is stopped immediately. If the set speed is maintained the aspirators 6 pass the pressure plate 38 underneath the path segment Y (Figure 5). If no 35 deviation from the setting has been found by analogy to the speed profile 40 of the incoming aspirators 6 at path point X
the discharging apparatus with the aspirators 6 is lowered in 2lssas2 response to the stroke "Z" (Figure 7) at a timed rest interval by means of an electrical numerically controlled servomotor 41 and a swivelling leverbar 42 (Figures 7 and 8) driven via the toothed belt 34 or the toothed racks 53 in such a manner that 5 shortly after the end of the travel stroke "T" at the terminal point 43 the aspirators 6 are set down on the finished pressed board 49 and are vacuuming it. The swivelling movement over the arc 31 (Figure 7) is actuated by the servomechanism 41/42 once again via a speed profile which can be read in o numerically. After the servomechanism 41/42 has lifted the finished board 49 via stroke "Z" the carriage 1 is conveyed out of the press 9 via the travel stroke "L" at high speed in fast travel mode in conformity with the control curve 13 and conveyed into the press 9 with the grab sector 7. The 15 servomotor 41 can be used at the same time to control the distance "Z" which always uniformly matches the varying thicknesses P of the material for pressing (Figure 7). At the end of the travel stroke "L" i.eO at the terminal point 12 the grabs 5 are opened in the extended telescopic arm position 45 and conveyed back at high speed in conformity with the speed profile 44 (Figure 6), that is, out of the pressure plate sector. At path position X0 the closing movement of the pressure plate 38 is started and scanned by the absolute motion pickup 37 in accordance with the speed curve 39. If a 25 deviation from the setting of the speed profile of the speed curves 44 and 39 between path positions X0 through X2 and Y0 through Y3 iS detected in the coordinating computer the closing movement is stopped by the controllable rapid shutoff valve 47~ If the speed coordinates X and Y agree the pressure plate 30 38 passes without hindrance the position X2 cleared by the telescopic arms 2.
_ Legend of Reference Numerals 1. Carriage 17. Numerically controlled motor 2. Telescopic arm 18. Toothed belt 3. Front surface of telescopic arm 19. Telescopic slide 4. Material for pressing 20. Coupling 5. Terminals, grab 21. Toothed belt 6. Aspirator 22. Guide rollers 7. Grab sector 23. Fixed point 80 Suction sector 24. Chassis 90 Press 25. Telescopic slide lOo Motors (NC) 26. Coupling 11. Starting point 27. Roller guides 19, 25 12. Terminal point 28. Roller guides 19, 25 130 Fast travel mode 29. Vertical load 14. Drive shaft 30. Material set-up point 15. Drive shaft 31. Arc 16. Numerically controlled 32. Drive shaft motor 2198~52 33. Toothed belt (chains) 50. Depositing table 34. Toothed belt drive 51. Wheels 35. Slow travel mode 52. Tracks 36. Waiting position 53. Toothed rack drive 37. Absolute motion pickup 54. Lower pressure plates 38. Upper pressure plate 39. Speed curve 40. Speed curve 41. Servomotor 420 Leverbar 43. Terminal point 44. Speed curve 45. Telescopic arm 460 Pressure cylinder pistons, setup in press 47. Rapid shutoff valve 48. Coating table 49. Extruded board
Claims (10)
1. A process for charging and discharging short-stroke presses with layered material for pressing which consists of load-bearing boards with hardening layers above and below of hardenable synthetic resin or hardenable synthetic resin film, a movable carriage being provided between the coating table, the press and the depositing table with grab and suction apparatus; the grab apparatus grasps the material for pressing on both its longitudinal edges and can be conveyed into the pressing chamber and out of it when the material is deposited and after the subsequent pressing process and the opening of the press the finished board is vacuumed on both its longitudinal edges by the suction apparatus conveyed into the press, lifted and moved out of the press, characterized by the following features:
a) the carriage with the material for pressing is conveyed towards the pressing chamber by a numerically controlled electric motor at high acceleration and at high speed, while the return travel to the coating table and the simultaneous setting-up travel of the suction apparatus to the pressing chamber take place in a slower travel mode, b) the working strokes for inward and outward travel and the T and Z strokes for lowering the grab and suction apparatus are powered in turn reversibly and independently of one another by a numerically controlled central electrical drive, c) a computer is used to coordinate/link the numerically controlled speed profiles between the vertical closing and opening movements H of the press (pressing stroke) numerically controlled and set by the absolute motion pickup as well as the horizontal linear translational movements T of the grab and suction apparatus and the descending movement Z of the suction apparatus so that by scanning the given path positions (X0, X1, X2, X3, Y0, Y1, Y2, Y3) and the speed gradients all four movements L, H, T and Z can be controlled by the computer in a working cycle in which they are interruption-free and overlap one another.
a) the carriage with the material for pressing is conveyed towards the pressing chamber by a numerically controlled electric motor at high acceleration and at high speed, while the return travel to the coating table and the simultaneous setting-up travel of the suction apparatus to the pressing chamber take place in a slower travel mode, b) the working strokes for inward and outward travel and the T and Z strokes for lowering the grab and suction apparatus are powered in turn reversibly and independently of one another by a numerically controlled central electrical drive, c) a computer is used to coordinate/link the numerically controlled speed profiles between the vertical closing and opening movements H of the press (pressing stroke) numerically controlled and set by the absolute motion pickup as well as the horizontal linear translational movements T of the grab and suction apparatus and the descending movement Z of the suction apparatus so that by scanning the given path positions (X0, X1, X2, X3, Y0, Y1, Y2, Y3) and the speed gradients all four movements L, H, T and Z can be controlled by the computer in a working cycle in which they are interruption-free and overlap one another.
2. A process as in Claim 1, wherein the travel of the grab and suction apparatus into and out of the pressing chamber is always linear and set orthogonally to the direction of charging.
3. A process as in Claim 1 or Claim 2, wherein during the closing movement of the press the speed profile is scanned by an absolute motion pickup and entered in the computer.
4. A process as in Claim 1, Claim 2 or Claim 3, wherein the closing process of the press is stopped if the path positions (X0, X1, X2, X3, Y0, Y1, Y2, Y3) and the speed profiles deviate from their settings.
5. A process as in Claim 1, Claim 2, Claim 3 or Claim 4, wherein the descending movement of the discharging telescopic arms and the height adjustment of the discharging telescopic arms to varying thicknesses of material for pressing is effected by means of numerically controlled electric motors.
6. A device for charging and discharging short-stroke presses with a carriage which can be moved between a coating table, a press and a depositing table, the carriage having on each of its longitudinal sides grab apparatus and suction apparatus for handling the material for pressing and the finished board, for the purpose of executing the process as defined in Claim 1, wherein the grab and suction apparatus consist of linearly mobile charging and discharging telescopic arms equipped with modular handling tools, which are powered reversibly and independently of one another by a numerically controlled central drive shaft, and the charging and discharging telescopic arms are designed with one or more modularly assembled telescopic slides which can be slid into one another.
7. A device as in Claim 6, wherein the telescopic slides can be driven by toothed belts via the central drive shafts.
8. A device as in Claim 6 or Claim 7, wherein the parts for attaching the terminals (grab) and the aspirators to the telescopic arms have the same modular assembly.
9. A device as in Claim 6, Claim 7 or Claim 8, wherein the descending and rising movements of the aspirators are powered by a numerically controlled motor via a toothed belt drive, and the toothed belt drive lifts or lowers the discharging mechanism with the aspirators by the amount Z via a leverbar.
10. A device as in Claim, Claim 7 or Claim 8, wherein the descending and rising movements of the aspirators are powered by a numerically controlled motor via a toothed rack drive, and the toothed rack drive lifts or lowers the discharging device with the aspirators by the amount Z via a toothed rack.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996106132 DE19606132A1 (en) | 1996-02-20 | 1996-02-20 | Feeding and emptying of a short cycle press |
| DE19606132.6 | 1996-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2198052A1 true CA2198052A1 (en) | 1997-08-21 |
Family
ID=7785812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002198052A Abandoned CA2198052A1 (en) | 1996-02-20 | 1997-02-20 | Process and device for charging and discharging of short-stroke presses |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA2198052A1 (en) |
| DE (1) | DE19606132A1 (en) |
| IT (1) | IT1290248B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6451138B2 (en) | 1997-10-07 | 2002-09-17 | Dieffenbacher Maschinenfabrik Gmbh | Method and device for charging and discharging a short-cycle and/or coating press |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19734076B4 (en) * | 1997-08-06 | 2006-03-23 | Dieffenbacher Gmbh + Co. Kg | Laying device for press packages of sheet-shaped slip material and a support plate |
| DE19744285B4 (en) * | 1997-10-07 | 2010-04-15 | Dieffenbacher Maschinenfabrik Gmbh, Zaisenhausen | Apparatus for feeding short-cycle or coating presses |
| DE19757003B4 (en) * | 1997-12-20 | 2008-12-18 | Dieffenbacher Gmbh + Co. Kg | Method, installation and device for surface coating of boards and use of the method |
| DE102010022625A1 (en) | 2010-06-04 | 2011-12-08 | Festo Ag & Co. Kg | Handling system for handling objects |
-
1996
- 1996-02-20 DE DE1996106132 patent/DE19606132A1/en not_active Ceased
-
1997
- 1997-02-04 IT ITMI970210 patent/IT1290248B1/en active IP Right Grant
- 1997-02-20 CA CA002198052A patent/CA2198052A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6451138B2 (en) | 1997-10-07 | 2002-09-17 | Dieffenbacher Maschinenfabrik Gmbh | Method and device for charging and discharging a short-cycle and/or coating press |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19606132A1 (en) | 1997-08-21 |
| IT1290248B1 (en) | 1998-10-22 |
| ITMI970210A1 (en) | 1998-08-04 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Dead |