EP0287447A1 - Verfahren und Vorrichtung zum Entfernen von Längsbewehrungsbandeisen aus Platten mit noch nicht abgebundenem hydraulischem Bindemittel - Google Patents
Verfahren und Vorrichtung zum Entfernen von Längsbewehrungsbandeisen aus Platten mit noch nicht abgebundenem hydraulischem Bindemittel Download PDFInfo
- Publication number
- EP0287447A1 EP0287447A1 EP88400870A EP88400870A EP0287447A1 EP 0287447 A1 EP0287447 A1 EP 0287447A1 EP 88400870 A EP88400870 A EP 88400870A EP 88400870 A EP88400870 A EP 88400870A EP 0287447 A1 EP0287447 A1 EP 0287447A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- strips
- tool
- gripping
- conveyor
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
Definitions
- the present invention relates to a method and a device making it possible to extract at will longitudinal strips arranged in the mass of fresh plates based on hydraulic binder, in particular in fiber cement, leaving a manufacturing machine.
- feelers measure the thickness of the product obtained and, as soon as this thickness is judged to be outside the norm, the product is extracted from the conventional finishing cycle, then directed to a dissolver waste where the material is crushed and treated to be reintegrated as additional raw material in the tanks of the manufacturing machine.
- This operation simple in the presence of easily dispersible elements and of smaller dimensions (fibers and cement), turns out to be impractical when plastic strips are present in the plate.
- these strips are wound either around the shaft of the shredder's turbine, creating disturbances by unbalance effect, or around the pump rotor with risk of seizing for the latter. .
- the strips may block the exhaust pipes by fouling.
- the subject of the invention is precisely a process and device for extracting the strips from the fresh plates deemed to be defective, at the outlet of the manufacturing machine, in order to allow the recycling of the material constituting the plates, as is usually practiced in the case of plates devoid of frame.
- a method for separating longitudinal reinforcing strips from a fresh non-stiffened plate based on hydraulic binder resting approximately horizontally on the conveyor characterized in that it consists in: - immobilize the plate on the conveyor; - grasp the straps mechanically approximately in the middle of the plate; - lift the strips up to a sufficient distance to separate them from the plate; and - evacuate the strips on one side of the plate.
- each of them can in particular be pinched individually by a gripping tool.
- the strips are raised by applying unevenly distributed tensile forces to them, which makes it possible to remove them from the material constituting the plate, avoiding the lifting of the latter by peeling effect.
- the lifting of the strips can thus be carried out in two stages.
- a first phase tensile forces are exerted on the strips which gradually decrease from one side to the other of the plate.
- this first phase it is advantageous to maintain the plate in order to prevent it from lifting.
- a second phase the distribution of forces is reversed and tensile forces are exerted on the strips which gradually increase from side to side of the plate.
- the strips are lifted to a distance of about one meter above the plate.
- the invention also relates to a device for implementing the method described above.
- This device is characterized in that it comprises a tool-carrying arm arranged transversely above the plate and supporting gripping tools in number equal to the number of strips to be extracted, means for actuating gripping tools for grasp a strip using each tool, means for moving the tool arm away from and closer to the plate and means for moving the tool arm on one side of the plate.
- the tool-carrying arm is articulated by a horizontal axis on one end of a horizontal bar, the opposite end of which is slidably mounted on a vertical guide arranged next to the conveyor, the means for moving the tool-holder arm away from and closer to the plate, comprising means for pivoting said arm around the horizontal axis and means for sliding the horizontal bar on the vertical guide.
- the tool-holding arm is pivoted by about 25 ° around its axis of articulation on the horizontal bar, so as to extract mainly, in a first time, the strips furthest from this axis, then the horizontal bar is moved upwards by gradually bringing the tool-holder arm in alignment with the latter, so as to mainly extract, in a second step, the strips closer to the axis of the arm.
- means are advantageously provided for pivoting the horizontal bar around a vertical axis adjacent to the end of this bar which slides on the vertical guide.
- each gripping tool comprises a hook and a claw.
- the hooks are of substantially semi-circular shape and they are articulated on the tool-carrying arm so that they can be actuated simultaneously.
- their free end is sharpened in the shape of a point, in order to be able to penetrate more easily into the material of the plate.
- the claws are ordered separately and ensure both the pinching of the strips on the hooks and the cleaning of the latter.
- an anti-lifting device can be applied to the plate to maintain the latter on the conveyor during the lifting of the strips.
- This device comprises parallel pads, arranged longitudinally and mounted under the horizontal bar between the gripping tools, preferably by means of means making it possible to adjust the spacing between the pads.
- FIG. 1 shows the path followed by a corrugated fiber-cement plate reinforced with longitudinal polypropylene strips, at the outlet of a dehydration manufacturing machine.
- the fresh plate from a cylinder 1 for shaping the machine is unrolled on a rubber conveyor 2, approximately horizontal. It then passes under feelers of thickness (not shown) which control the elimination of the plates judged to be defective.
- the defective plate 3 not yet stiffened, is sent to a device 4 for extracting the strips according to the invention.
- the middle of the plate 3 is positioned approximately plumb with an extraction assembly 5 of the extraction device 4, the conveyor 2 is stopped, in order to allow the assembly 5 to take off the strips 6. This Once this phase has been carried out, the plate 3 resumes its linear progression towards a waste dissolver 7, while the extraction assembly 5 continues the movements making it possible to completely separate the strips from the plate 3.
- the assembly 5 making it possible to extract the strips 6 from the fiber cement plate 3 comprises a number of gripping tools 8 equal to the number of strips to be extracted (one strip per wave).
- the gripping tools 8 are mounted on a tool-carrying arm 12, one end of which is articulated by a hinge pin 10 at one end of a horizontal bar 11.
- the horizontal bar 11 is slidably supported by a vertical guide 14 which rests on the ground next to the conveyor 2, by means of a device 19, such as a jack or a geared motor, making it possible to control the rotation of the assembly constituted by the support arm tools 12, the horizontal bar 11 and the guide 14 around the vertical axis 13 of the latter.
- the guide 14 is arranged in a vertical plane oriented transversely relative to the conveyor 2 and in which the latter is interrupted as illustrated in FIG. 2a. It is thus possible, by actuating the device 19, to bring the assembly extraction 5 in a transverse position, above the interruption formed in the conveyor 2, in order to grip the strips 6 in the part of the plate 3, then to extract them by lifting them above this plate .
- the pivoting of the tool-carrying arm 12 around the articulation axis 10 is controlled by a pneumatic cylinder 16 interposed between the arm 12 and the horizontal bar 11. Furthermore, the sliding of this the latter along the vertical guide 14 is controlled by an electric motor 18 actuating a vertical endless screw 17 linked to the guide 14 and engaged on a screen linked to the bar 11.
- each of the gripping tools 8 comprises a hook 9, preferably made of thin steel, which has a substantially semi-circular shape in the plane of the arm 12, and the end of which is tapered to form a point facilitating its entry into the plate.
- Each hook 9 is articulated on the tool-carrying arm 12 by an axis 9a perpendicular to the latter.
- a pneumatic cylinder 15 (FIG. 2) supported by the arm 12 simultaneously controls the pivoting of all the hooks 9 around their axes 9a by means of a rod 15a (FIG. 3A).
- Each gripping tool 8 furthermore comprises a claw 20 mounted on the tool-carrying arm 12 by means of a pneumatic microverin 21.
- the claw 20 is arranged in the plane of the corresponding hook 9 and the actuation of the microverin 21 allows to apply the claw against the hook, as illustrated in FIG. 3B d, to pinch the strip 6 between these two members, when the hook 9 has pivoted about its axis 9a under the action of the jack 15.
- the tool-carrying arm 12 When a plate 3 deemed to be defective is parked under the extraction assembly 5, the tool-carrying arm 12 is initially horizontal and each gripping tool 8 is arranged vertically above a strip 6 of the plate 3 (FIG. 3Ba). The bar 11-tool holder 12 assembly is then lowered by rotation of the worm 17, so as to cause the perforation of the plate by the ends of the hooks 9 (FIG. 3Bb). The jack 15 then causes the simultaneous rotation of all of the hooks 9 which come to grip the strips 6 by surrounding them from below (FIG. 3Bc).
- the extraction is completed in a second step by the combined action of an upward translation of the bar 11 moved by the screw 17 and a return to the horizontal of the support arm tools 12.
- This second series of movements this time mainly extracts the strips 6 closest to the axis of rotation 10, by exerting extraction forces which progressively increase towards the latter.
- the upward translation of the bar 11 continues up to a distance of approximately 1 m above the fresh plate (FIG. 6).
- the conveyor 2 is restarted to accelerate the tearing of the strips.
- the device 19 then ensures, as shown in FIG. 7, the pivoting of the bar 11-tool holder arm 12 assembly until this assembly is entirely offset on one side of the conveyor 2 and of the plate 3 , for example above a tank 25.
- the strips are then released by actuating the cylinders 15 and 21 in the opposite direction.
- the said assembly is then returned to its initial position above the conveyor, where it is then ready to be lowered to process a new defective plate.
- FIG. 8 shows another embodiment of the invention in which, in order to avoid lifting the plate 3 during the successive tearing of the strips 6 by the hooks 9, an anti-lifting device is fixed under the horizontal bar 11.
- the anti-lifting device comprises a series of parallel pads 22, produced in flat bars, fixed under the bar 11 in the direction of travel of the plates, between the strips 6.
- the pads 22 partially cover the plate in the areas devoid of strips and are fixed to the bar 11 by an adjustment system comprising an oblong opening 24 making it possible to adjust the spacing between the pads.
- a notch 23 is formed on each shoe 22, in line with the hooks 9, to allow the latter to pivot in the direction of the plate.
- the strips are gripped by a system of cables mounted on pulleys, actuated by a winch and tensioned by a counterweight.
- the implementation of the winch makes it possible to simultaneously encircle all the strips and to lift them up to a mandrel situated for example approximately 60 cm above the center of the plate.
- a gripper carried by an articulated arm then grasps all the strips to bring them to the side of the plate and reject them.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Specific Conveyance Elements (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88400870T ATE65047T1 (de) | 1987-04-15 | 1988-04-12 | Verfahren und vorrichtung zum entfernen von laengsbewehrungsbandeisen aus platten mit noch nicht abgebundenem hydraulischem bindemittel. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8705313 | 1987-04-15 | ||
| FR8705313A FR2613977B1 (fr) | 1987-04-15 | 1987-04-15 | Procede et dispositif de separation de feuillards d'armature longitudinale dans les plaques fibres-ciment a l'etat frais |
| FR8714174 | 1987-10-14 | ||
| FR8714174A FR2621852B1 (fr) | 1987-10-14 | 1987-10-14 | Procede et dispositif de separation de feuillards d'armature longitudinale dans les plaques fibres-ciment a l'etat frais |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0287447A1 true EP0287447A1 (de) | 1988-10-19 |
| EP0287447B1 EP0287447B1 (de) | 1991-07-10 |
Family
ID=26225921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19880400870 Expired - Lifetime EP0287447B1 (de) | 1987-04-15 | 1988-04-12 | Verfahren und Vorrichtung zum Entfernen von Längsbewehrungsbandeisen aus Platten mit noch nicht abgebundenem hydraulischem Bindemittel |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0287447B1 (de) |
| DE (1) | DE3863570D1 (de) |
| ES (1) | ES2023262B3 (de) |
| GR (1) | GR3002733T3 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE176154C (de) * | 1900-01-01 | |||
| GB191416116A (en) * | 1913-07-12 | 1915-07-06 | Henry Debauge | Improvements in and relating to the Removal of the Fabric or like Support from Automobile Tyre Covers and like articles of Vulcanised Indiarubber, and in Recovering India Rubber therefrom. |
| DE1264760B (de) * | 1965-03-03 | 1968-03-28 | Metallgesellschaft Ag | Vorrichtung zur elektrostatischen Trennung von fadenhaltigen Gummihaufwerken |
| FR2395895A1 (fr) * | 1977-07-01 | 1979-01-26 | Hatra Sa | Machine a ligaturer |
| EP0188680A2 (de) * | 1985-01-17 | 1986-07-30 | Ford-Werke Aktiengesellschaft | Innenverkleidungsteil für Kraftfahrzeuge und Vorrichtungen zu seiner Herstellung |
-
1988
- 1988-04-12 EP EP19880400870 patent/EP0287447B1/de not_active Expired - Lifetime
- 1988-04-12 DE DE8888400870T patent/DE3863570D1/de not_active Expired - Lifetime
- 1988-04-12 ES ES88400870T patent/ES2023262B3/es not_active Expired - Lifetime
-
1991
- 1991-09-16 GR GR91401348T patent/GR3002733T3/el unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE176154C (de) * | 1900-01-01 | |||
| GB191416116A (en) * | 1913-07-12 | 1915-07-06 | Henry Debauge | Improvements in and relating to the Removal of the Fabric or like Support from Automobile Tyre Covers and like articles of Vulcanised Indiarubber, and in Recovering India Rubber therefrom. |
| DE1264760B (de) * | 1965-03-03 | 1968-03-28 | Metallgesellschaft Ag | Vorrichtung zur elektrostatischen Trennung von fadenhaltigen Gummihaufwerken |
| FR2395895A1 (fr) * | 1977-07-01 | 1979-01-26 | Hatra Sa | Machine a ligaturer |
| EP0188680A2 (de) * | 1985-01-17 | 1986-07-30 | Ford-Werke Aktiengesellschaft | Innenverkleidungsteil für Kraftfahrzeuge und Vorrichtungen zu seiner Herstellung |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3863570D1 (de) | 1991-08-14 |
| EP0287447B1 (de) | 1991-07-10 |
| ES2023262B3 (es) | 1992-01-01 |
| GR3002733T3 (en) | 1993-01-25 |
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