EP0308661B1 - Verfahren und Vorrichtung zur Reinigung von Unterformen zum Formen von Platten aus einer härtbaren plastischen Masse im Stranpressverfahren - Google Patents

Verfahren und Vorrichtung zur Reinigung von Unterformen zum Formen von Platten aus einer härtbaren plastischen Masse im Stranpressverfahren Download PDF

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Publication number
EP0308661B1
EP0308661B1 EP88113636A EP88113636A EP0308661B1 EP 0308661 B1 EP0308661 B1 EP 0308661B1 EP 88113636 A EP88113636 A EP 88113636A EP 88113636 A EP88113636 A EP 88113636A EP 0308661 B1 EP0308661 B1 EP 0308661B1
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EP
European Patent Office
Prior art keywords
pallets
cleaning
abutting edges
installation
parallel
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.)
Expired - Lifetime
Application number
EP88113636A
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German (de)
English (en)
French (fr)
Other versions
EP0308661A1 (de
Inventor
Jürgen Braas
Hans Kautz
Jürgen Schmietenknop
Antoni Ulpts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braas GmbH
Original Assignee
Braas GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Braas GmbH filed Critical Braas GmbH
Priority to AT88113636T priority Critical patent/ATE57491T1/de
Publication of EP0308661A1 publication Critical patent/EP0308661A1/de
Application granted granted Critical
Publication of EP0308661B1 publication Critical patent/EP0308661B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/386—Cleaning

Definitions

  • the invention relates to a method for cleaning sub-molds for forming panels from a hardenable plastic mass, for example concrete roof tiles, in the extrusion process, in which a continuous layer of the plastic mass is applied to the sub-molds, which are fed to a coating system on a transport device with abutting edges and then compacted and optionally profiled by means of a shaping roller and smoother, and further the compacted layer is cut in a cutting station at the abutting edges of the lower molds into plate moldings, which are then hardened, if appropriate at elevated temperature, and then separated from the lower molds and then removed while the lower molds are fed back into the coating system.
  • the invention further relates to a device for performing this method.
  • the coverings on the abutting edges of the lower molds mean that the lower molds no longer lie against one another, the distance between the lower molds corresponding to the covering thickness at the abutting edges of the lower molds, which either leads to differences in the length of the roof tiles produced or to the knives of the cutting station the subforms comes.
  • the latter is particularly disadvantageous because it leads to damage to the knives and the lower molds.
  • the cleaning of the lower molds on their butt edges is essential.
  • the lower molds of the production plant have so far been removed, cleaned by hand using simple tools, such as triangular scrapers, on the butt edges and returned to the production plant. Some of this could be done while production was running, but as a rule the production plant was stopped or shutdown.
  • the invention is therefore based on the object of providing a method and a device for carrying out this method, in which the cleaning of the lower molds for the production of plates, for example concrete roof tiles, takes place automatically, uniformly and gently for the lower molds during production.
  • underforms are transferred from their transport device to a cleaning system before they are re-coated with plastic mass, that they pass through the cleaning system with butt edges extending in the feed direction, that the butt edges are hardened by adhering to them Mass is freed and the sub-molds are then fed back to the transport device and are transported further there in their previous position.
  • This procedure ensures that the cleaning of the sub-molds takes place outside of the actual production process of the system for forming the plates, and thus that the cleaning system for the sub-molds can be incorporated into an existing system without substantial modification or modification of the production process. Furthermore, in the event of malfunctions or failure of the cleaning system, a malfunction of the production or the shutdown of the entire system is avoided and the possibility is given to change the manufacturing process to the cleaning of the lower molds, e.g. to waive when restarting the system.
  • the lower molds pass through the cleaning system with the abutting edges in a horizontal position. This can be achieved by transferring a lower mold to be cleaned from the transport device to the cleaning system and from the cleaning system to the transport device in each case along a circular path section, in particular a quarter circle.
  • the sub-mold following in the incoming strand of sub-molds which abuts on the sub-mold to be transferred with its abutting edge, interferes with the transfer, and to create a gap between the incoming and the continuing strand of sub-molds on the transport device, into which then a cleaned sub-mold can be returned from the cleaning system, it is provided that, before a lower mold to be cleaned is transferred to the cleaning system, the lower mold following in the direction of transport is braked briefly and in this way an intermediate space is formed between the abutting edges of the two lower molds.
  • the adhering hardened mass is preferably broken up and scraped off in order to clean the respective lower mold.
  • the object is achieved with a device which is characterized by a cleaning system with a frame on which a feed device is attached, along the path of which at least one pair of cleaning devices is provided, the mutual free distance of which is transverse to the path of the distance the abutting edges correspond to a lower mold, and by means of a transfer device which is arranged in the end regions of the web and can be moved between a position on the web and a position on the transport device.
  • the feed device is arranged essentially horizontally, at the same height as and parallel to the transport device, and it guides the feeder molds along the web of the feed device and to feed it Pair of parallel guide rails and a piston-cylinder arrangement parallel thereto with a driver projecting into the plane of the guide rails.
  • each transfer device has an arm which can be pivoted about a vertical axis, which is coupled to its own drive device, in particular a piston-cylinder arrangement, and a gripping device is attached to its free end.
  • the gripping device has two gripper legs which can be pivoted about parallel axes between a closed and an open position, in particular are pretensioned with springs and which are connected to one another by a piston-cylinder arrangement, the springs being used to support the Holding force of the piston-cylinder arrangement and serve to secure the lower form transferred between the gripper legs in the event of failure of the piston-cylinder arrangement and, to increase the friction between the gripper legs and the lower forms, the gripper legs on their mutually facing sides, each with a Pad made of friction material are provided, which prevents the lower molds from falling out during the pivoting movement.
  • the lifting and lowering movements when transferring the lower mold are made possible in that the gripping devices can be moved in the vertical direction and can be driven by an actuator, in particular a piston-cylinder arrangement.
  • Each cleaning device preferably has a toothed roller which can be freely rotated about an axis which is essentially perpendicular to the web, and a scraper blade arranged downstream thereof in the feed direction and having a cutting edge which is essentially parallel to the axis.
  • the toothed rollers are rotated and the mass adhering to the lower molds is broken up by the teeth of the toothed roller.
  • the scraper blades arranged downstream of the toothed rollers in the feed direction then scrape with their cutting edges the broken-up mass from the abutting edges of the lower mold.
  • the toothed roller and / or the scraper blade are adjustably prestressed in the direction of the opposite cleaning device, in particular by means of a spring.
  • a braking device for the lower molds is provided on the transport device in the transport direction in front of the first transfer device.
  • the braking device preferably has at least one brake shoe parallel to the transport device, which can be adjusted transversely to the transport direction by means of an actuator.
  • the feed device, the transfer devices and, if appropriate, the braking device are connected to a control device which has a first sensor arranged in the transport direction upstream of the first transfer device and a sensor in the transport direction upstream of the second transferring device direction is arranged second sensor is provided.
  • the sensors can be designed as light barriers or as proximity switches.
  • FIG. 1 shows a section 1 of a system for molding concrete roof tiles according to the extrusion process, in which the lower molds 2 are transported on a transport device 12 in the transport direction 13 to a coating system, not shown.
  • the transport device 12 has a conveyor belt 10 and a frame 11, on which guide strips 14 are fastened, so that the subforms 2 arranged one behind the other in an incoming strand 3a and in a continuous strand 3b with abutting butt edges 6, here end faces, are transported.
  • a brake device 60 is also arranged on the frame 11, by means of which, as indicated, an incoming lower mold and thus also the subsequent lower molds can be held.
  • the cleaning system R is arranged with its frame 40 next to and parallel to the transport device 12. It can be set up on the right and left side of the transport device 12, as seen in the transport direction 13, and connected to it.
  • the frame 40 is provided with adjustable feet 42, so that the web 16 of the cleaning system can be adjusted horizontally and to the same height H as the transport device 12.
  • the first transfer device 20, which is fastened to the frame 40 of the cleaning system R and seen in the feed direction 15, has an arm 22 which is fastened to a vertical shaft 43 which is rotatably mounted on the frame.
  • the arm 22 can thus be pivoted horizontally and can be moved between a position on the track 16 and a position on the transport device 12 with the aid of a drive device 21 attached to the frame 40 in the form of a piston-cylinder arrangement.
  • the second transfer device 39 following in the feed direction 15 is constructed like the first transfer device 20 and can be pivoted.
  • a frame 41 is also arranged in the frame 40, on which the bottom mold guide 75, along which the web 16 runs, a pair of cleaning devices 50, the mutual distance of which corresponds to the distance between the end faces 6 of a bottom mold 4 to be cleaned, and the feed device 45 is fastened.
  • the feed device 45 is arranged essentially horizontally, at the same height as the transport device 12 and parallel to it, and, as shown in detail in FIG. 8, consists of a piston-cylinder arrangement 46 which is in the center of the frame 41 and attached parallel to the guide rails 76 of the lower mold guide 75 and provided with a driver 47, which consists of a U-shaped holder 48 with fingers 49 which protrude into the plane of the guide rails 76 of the lower mold guide and can be moved in the longitudinal direction of the frame 41.
  • FIG. 2 shows the method step of removing a lower mold 4 to be cleaned from the transport device 12 and depositing a cleaned lower mold 5 onto the transport device.
  • the strand 3a of subforms 2 arriving on the transport device 12 is stopped by briefly actuating the braking device 60, so that an intermediate space is generated between the end faces 6 of the subform 4 to be cleaned and the subform 2 following in the transport direction 13. This prevents the lower mold 4 to be cleaned from being pushed out of the transfer device again by the subsequent lower mold 2 when it is removed by the first transfer device 20.
  • the lower mold 4 to be cleaned ie the last of the continuing strand 3b in the transport direction 13, is grasped and lifted by the transfer device 20 connected to a control device (not shown), as will be explained in more detail.
  • This process is initiated by the control device Tet, which receives a control signal from a schematically illustrated first sensor 8 arranged between the braking device 60 and the first transfer device 20 and which detects the end of the continuing strand 3b.
  • the sensors 8 and 9 are designed as proximity switches.
  • an already transferred lower mold 4 to be cleaned rests on the lower mold guide 75 and is turned into a pair of cleaning devices 50 by the feed device 45 along the path 16 with end faces 6 that extend in the feed direction 15 and are located horizontally advanced.
  • FIG. 3 shows the method step following FIG. 2, in which the arm 22 of the first transfer device 20 with the lower mold 4 to be cleaned is pivoted horizontally about the shaft 43 by the drive device 21. At the same time, the empty arm 22 of the second transfer device 39 is pivoted back.
  • the transfer of the lower mold 4 to be cleaned from the transport device 12 to the cleaning system R and the cleaned lower mold 5 shown in FIG. 2 from the cleaning system to the transport device takes place along a circular path section, here a quarter circle.
  • the braking device 60 is released, so that the incoming strand 3a of the lower molds 2 can continue to move in the transport direction 13.
  • the lower mold 4 to be cleaned has now been pushed between the pair of cleaning devices 50 by the feed device 45.
  • FIG. 4 shows the method step following FIG. 3, in which the arms 22 of both transfer devices 20 and 39 are located above the lower mold guide 75 of the cleaning system.
  • the lower mold 4 to be cleaned is just being placed on the lower mold guide 75 by the first transfer device 20 and the cleaned lower mold 5 is removed by the second transfer device 39.
  • the empty first transfer device 20 and the second transfer device 39 with the cleaned lower mold 5 are then pivoted back to the transport device 12.
  • the feed device 45 is again in the starting position in order to be able to advance the lower mold 4 which has just been put on to the pair of cleaning devices 50.
  • the braking device 60 is still released at this time.
  • FIG 5 shows the braking device 60 and a part of the transport device 12 on a larger scale with a fixed lower mold 2.
  • a rail 61 parallel to the transport direction 13 is fastened to its frame 11.
  • a parallelogram linkage 62 is fastened to the frame 11 by means of a holder 63, part of which is designed as a brake shoe 64 parallel to the direction of transport 13, on which two levers 65 and 66 are horizontally movably attached.
  • the mutually parallel levers 65, 66 are articulated to one another via a connecting rod 67 parallel to the brake shoe 64.
  • Each lever 65 and 66 is rotatably fastened to the holder 63 via a vertical axis 68 and 69 and lies on a support part 70 of the holder 63.
  • An actuator 71 in the form of a piston-cylinder arrangement is fastened to one support part 70, the piston rod 72 of which engages with the connecting rod 67 on the connecting joint of the lever 66.
  • the actuator 71 is shown in the braking position, the piston rod 72 pivoting the parallelogram linkage 62 in the sense that the brake shoe 64 is adjusted substantially parallel to its original position, transversely to the transport direction 13. This causes a lower mold 2, which is located between the rail 61 and the brake shoe 64, to be braked or held, and thus the incoming strand 3a.
  • FIG. 6 shows the brake device 60 in the released state and a part of the transport device 12 with continuous lower molds 2.
  • the piston rod 72 was retracted against the position shown in FIG. 5 and thus the brake shoe 64 was moved away from the incoming strand 3a of the lower molds 2 .
  • FIG. 7 shows part of the transfer device 20 or 39 of the device according to the invention in the closed position and empty state.
  • Each transfer device 20 or 39 has an arm 22 which can be pivoted about the vertical shaft 43 shown in FIG. 2, on the free end of which a gripping device 27 is attached, which has a lifting beam 28 and two on its ends about parallel axes 34 between a closing and an open position has pivotable gripper legs 30.
  • the gripping device 27 is by means of an actuator 25 in the form of a piston-cylinder arrangement which engages on a guide plate 29 which is fixedly connected to the upper side of the lifting beam 28, between an upper stop plate 23, to which the actuator 25 is also attached, and one lower stop plate 24 movable in the height direction.
  • the gripping device 27 is in its upper position.
  • the gripping device 27 is guided during its movement via two guide rods 26 which are fastened to the guide plate 29 and which run in guides in the upper and lower stop plates 23, 24.
  • the upper stop plate 23 and the lower stop plate 24 are attached to the top and bottom of the arm 22, respectively.
  • the drive device 21 shown in FIGS. 2 to 4 also acts on the arm 22.
  • the gripper legs 30 have height-adjustable gripping strips 31 with mutually bent lower edges 32 on which the lower molds rest. Above these edges 32, a support 33 made of friction lining material is attached to the sides facing each other.
  • a piston-cylinder arrangement 37 arranged between the gripper legs 30 serves to close and open the gripping device 27.
  • two intersecting springs 36 are provided, which are fastened with their ends on the one hand to the axes 34 of the gripper legs 30 and on the other hand to bolts 35 arranged in the lower region of the gripper legs 30.
  • FIG. 8 shows part of the frame 41 of the cleaning system R according to the invention with the attached lower mold guide 75 and the pair of cleaning devices 50 on a larger scale, a lower mold 4 to be cleaned being advanced along the path 16 to the pair of cleaning devices.
  • the lower mold guide 75 has a guide rail 76 on each longitudinal side and it is provided in the area of the cleaning devices 50 above each guide rail 76 with a safety bar 77, the distance from the guide rail corresponding to the height of the edge area of the lower mold 4 to be cleaned.
  • These securing strips 77 are each fastened to the brackets 51 and prevent the lower mold 4 to be cleaned from being lifted off the guide rails 76 during the cleaning process.
  • a cleaning device 50 is fastened to each longitudinal side of the frame 41 by means of a holder 51.
  • the brackets 51 are bent outwards in front of the cleaning devices 50 and thus form guide elements 52 converging in the feed direction.
  • Each cleaning device 50 has a freely rotatable toothed roller 53 which is seated on an axis 54 which is mounted in two bearings 55 and is essentially perpendicular to the web 16.
  • each toothed roller 53 is arranged in the feed direction 15 a scraper blade 56 which has a cutting edge 56a which is substantially parallel to the axis 54 and which is adjustably attached to a pivotably arranged blade holder 58 via a holding bracket 57.
  • Each scraper blade 56 is biased in the direction of the respectively opposite cleaning device 50 by a spring installed in the blade holder 58.
  • the lower mold 4 resting on the guide rails 76 has coverings 7 made of hardened concrete on the end faces 6, which are to be removed.
  • the lower mold 4 is advanced from the feed device 45 in the feed direction 15 to the pair of cleaning devices 50 and passes through the area of the two guide elements 52 by which it is precisely aligned.
  • Fig. 9 shows the process step of cleaning the lower mold 4.
  • the lower mold 4 to be cleaned is pushed further in the position shown 15 in the feed direction 15 between the pair of cleaning devices 50, the coverings 7 on the end faces 6 first of the toothed rollers 53, which deal with rotate the advanced lower mold 4, broken open by notches and then scraped off by the scraper blades 56, which are pressed by the springs built into the blade holders 58 with their cutting edges 56a against the end faces of the lower mold.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
EP88113636A 1987-09-25 1988-08-22 Verfahren und Vorrichtung zur Reinigung von Unterformen zum Formen von Platten aus einer härtbaren plastischen Masse im Stranpressverfahren Expired - Lifetime EP0308661B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113636T ATE57491T1 (de) 1987-09-25 1988-08-22 Verfahren und vorrichtung zur reinigung von unterformen zum formen von platten aus einer haertbaren plastischen masse im stranpressverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873732359 DE3732359A1 (de) 1987-09-25 1987-09-25 Verfahren und vorrichtung zur reinigung von unterformen zum formen von platten aus einer haertbaren plastischen masse im strangpressverfahren
DE3732359 1987-09-25

Publications (2)

Publication Number Publication Date
EP0308661A1 EP0308661A1 (de) 1989-03-29
EP0308661B1 true EP0308661B1 (de) 1990-10-17

Family

ID=6336883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113636A Expired - Lifetime EP0308661B1 (de) 1987-09-25 1988-08-22 Verfahren und Vorrichtung zur Reinigung von Unterformen zum Formen von Platten aus einer härtbaren plastischen Masse im Stranpressverfahren

Country Status (5)

Country Link
EP (1) EP0308661B1 (el)
AT (1) ATE57491T1 (el)
DE (2) DE3732359A1 (el)
ES (1) ES2018873B3 (el)
GR (1) GR3001326T3 (el)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505635C1 (de) * 1995-02-18 1996-05-02 Braas Gmbh Verfahren und Vorrichtung zum Entnehmen und Einfügen eines Formstücks aus einem aus stirnseitig aneinanderliegenden Formstücken gebildeten Strang

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620923C1 (de) * 1996-05-24 1997-06-05 Braas Gmbh Unterform
CN114161554B (zh) * 2021-11-26 2023-04-04 安徽马钢矿业资源集团南山矿业有限公司 高效加气混凝土砌块生产线模具涂刷一体机及涂刷工艺

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752621A (en) * 1952-06-17 1956-07-03 David J Warsaw Block-mold pallet cleaning mechanism
GB1103151A (en) * 1966-02-05 1968-02-14 Associated Crates Ltd Improvements in or relating to crate washing apparatus
IT975406B (it) * 1972-10-27 1974-07-20 Colubra Lamsat Spa Metodo per trasferire pezzi tra le estremita di due trasportatori a rulli e relativa apparecchiatura
US4411350A (en) * 1981-09-04 1983-10-25 Frank Wolfram Reversing conveyer track
SE453170B (sv) * 1986-05-13 1988-01-18 Abece Ab Maskin for tillverkning av skivformiga produkter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505635C1 (de) * 1995-02-18 1996-05-02 Braas Gmbh Verfahren und Vorrichtung zum Entnehmen und Einfügen eines Formstücks aus einem aus stirnseitig aneinanderliegenden Formstücken gebildeten Strang

Also Published As

Publication number Publication date
DE3860828D1 (de) 1990-11-22
EP0308661A1 (de) 1989-03-29
DE3732359A1 (de) 1989-04-06
ATE57491T1 (de) 1990-11-15
ES2018873B3 (es) 1991-05-16
GR3001326T3 (en) 1992-08-31

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