EP0456962B1 - Vorrichtung zum Ausräumen des Presskopfs einer keramische Massen verarbeitenden Strangpresse - Google Patents

Vorrichtung zum Ausräumen des Presskopfs einer keramische Massen verarbeitenden Strangpresse Download PDF

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Publication number
EP0456962B1
EP0456962B1 EP91101607A EP91101607A EP0456962B1 EP 0456962 B1 EP0456962 B1 EP 0456962B1 EP 91101607 A EP91101607 A EP 91101607A EP 91101607 A EP91101607 A EP 91101607A EP 0456962 B1 EP0456962 B1 EP 0456962B1
Authority
EP
European Patent Office
Prior art keywords
frame
screw
screws
cleaning
press head
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
EP91101607A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0456962A3 (en
EP0456962A2 (de
Inventor
Hans Gyr
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.)
Rieter-Werke Handle KG
Rieter Werke Haendle GmbH
Original Assignee
Rieter-Werke Handle KG
Rieter Werke Haendle 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 Rieter-Werke Handle KG, Rieter Werke Haendle GmbH filed Critical Rieter-Werke Handle KG
Publication of EP0456962A2 publication Critical patent/EP0456962A2/de
Publication of EP0456962A3 publication Critical patent/EP0456962A3/de
Application granted granted Critical
Publication of EP0456962B1 publication Critical patent/EP0456962B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028—Loading or unloading of dies, platens or press rams
    • 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
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies

Definitions

  • a mouthpiece is placed on the outlet end of the press, the so-called press head, which determines the shape of the compact formed (cf. e.g. DE-C-520917).
  • the press head has the shape of a rectangular shaft, the outlet mouth of which is designed as a mouthpiece plate, to which the mouthpiece is attached, is generally screwed on.
  • a special mouthpiece is provided for each brick model. The mouthpiece attached to the mouthpiece plate engages in the mouth of the press head, generally to a depth of 200 to 300 mm and more.
  • the object of the present invention is therefore to provide a way of being able to carry out the removal of the press head effortlessly and as quickly as possible.
  • the solution to this problem according to the invention is achieved by a device consisting of a base frame which can be attached to the press head when the mouthpiece is removed, a screw frame which can be displaced linearly in the base frame, at least one clearing screw which is rotatably mounted on the screw frame, with several clearing screws these being mounted parallel to one another, and one Motorized drive to move the auger frame and to turn the auger or auger.
  • This device is attached to the press head after removal of the mouthpiece to be replaced and clears the press head effortlessly and cleanly to the desired depth in a short time. The time saved compared to previous manual clearing is around 2/3.
  • the device has a base frame 11, for example from rectangular tubes, in which a screw frame 12 is mounted so as to be linearly displaceable by means of recirculating ball bushings 12a.
  • the displacement of the screw frame 12 in the base frame 11 takes place by means of feed spindles 13, which are non-rotatably attached to the base frame 11.
  • the screw frame 12 On its front side, the screw frame 12 has bearings 14 (flange bearings) in which broaching screws 15 with a drilling tip 15a are mounted.
  • the broaching augers 15 extend parallel to one another and are driven (rotated) by worm spindles 16 which are rotatably connected to them and are rotatably mounted in the worm frame 12 at the rear end.
  • a drive motor 17 with three sprockets 17a, 17b and 17c is arranged on the screw frame 12.
  • the sprockets 17a, 17b serve to advance the frame 12, for which purpose they are each connected to a sprocket 18 seated on each feed spindle 13 via drive chains.
  • the chain wheels 18 have an internal thread which engages in the spindle thread of the feed spindles 13; With hub extensions 18a on both sides, each chain wheel 18 engages with the worm wheel 12 (FIG. 3), guide bushes being provided.
  • the sprocket 17c of the drive motor 17 serves to rotationally drive the worm spindles 16, for which purpose the sprocket 17c is in drive connection via a drive chain with sprockets 19 assigned to each worm spindle 16.
  • FIG. 4 shows a diagram of this drive for four broaches or for their worm spindles 16. It can also be seen from this that all worm spindles 16 and thus worms 15 rotate in the same direction of rotation.
  • the small chain wheels 28 are deflection wheels.
  • the sprocket 17c is provided with a freewheel such that when the screw carriage 12 returns, the screw spindles 16 and the screws 15 do not rotate.
  • the motor drive allows the screw carriage 12 in its entirety to be moved back and forth linearly with screws and drive motor, and that those which move together with the screw frame 12 move Screws 15 can be rotated.
  • this must understandably be brought up to the mouth of the extrusion press head to be cleared. This can be done, for example, in such a way that the base frame 11 is designed as a movable carriage or is suspended from a ceiling construction in a lowerable manner.
  • the device is articulated on the extrusion press so as to be pivotable by 90 °.
  • the base frame 11 has a swivel arm 11a which is pivotally attached to a holding device 21 which is fixedly arranged on the press head 20.
  • the clearing device In normal operation (working mode) of the extrusion press, the clearing device is pivoted away (upwards in FIG. 1), and a mouthpiece (not shown) is attached to the mouthpiece plate 20a forming the end of the press head 20.
  • the mouthpiece is first removed from the plate 20a, whereupon the removal device is pivoted into the removal position shown in FIG. 1, in which the removal screws 15 are in front of the mouth of the press head.
  • a bolt lock 22 ensures that the removal device is held securely in its removal position.
  • the feed spindles 13 are set in rotation via the chain drives described, with the result that the screw frame 12 moves in the direction of the press head 20 (feed) and the broaching screws 15 mounted on it penetrate into the interior of the press head.
  • the broaching augers 15 are rotated via the chain drive, which is also described. But so that the augers 15 drill with their tip 15a into the mass located in the press head 20, cut chip-like parts from the mass with their screw flights and convey these parts of the mass backwards out of the press head 20, where these mass parts then fall off. In this way, the press head 20 is quickly cleared out.
  • the drive is switched over so that the feed spindles 13 rotate in the opposite direction and the screw frame 12 with the screws 15 move out of the press head 20 again.
  • the entire clearing device is again pivoted away, and the new mouthpiece can be placed on the press head 20.
  • the coordination between feed and screw rotation must be such that the screws 15 are able to convey the material out properly, so that the screw flights are not "overfilled".
  • the hardness of the compressed material to be cleared will also be taken into account when dimensioning the feed rate.
  • scraper blades can be arranged at the screw end, as indicated schematically at 23, which in the manner of "chip breakers" detach the material from the screws 15 and ensure that cleaning of the screws after the removal process is unnecessary.
  • FIG. 5 shows an embodiment with six clearing screws 15 for clearing a rectangular press head.
  • 15 deflectors 24 are provided centrally for four screws.
  • the deflectors 24 are fixedly attached to the screw frame 12, for example have the Shape of a cone and are set back with their cone tip relative to the screws 15, preferably by 1/2 screw flight, so that material can be fed to the screws.
  • a knife frame 25 surrounding the outline of the screws 15 is indicated in FIG. Additional deflectors 26, which feed material to the screws 15, can be attached to this knife frame 25.
  • Fig. 6 shows a modification which shows that arrangements are also possible in which the augers 15 have different diameters.
  • a broaching auger 15 of large diameter is provided centrally, which is surrounded by four broaching augers 15 of smaller diameter.
  • a small press head with a circular cross-section one single auger would be sufficient.
  • comparatively large press heads with a rectangular cross section are much more common in practice.
  • a single drive motor is provided as the motor drive for feed and screw rotation. But it is also possible to feed and assign a separate motor to the screw rotation. It should be pointed out that the requirements for the drive power can be reduced considerably by the fact that the individual screws 15 are somewhat offset with respect to their pitch. This means that the screws penetrate the material "softer" and there is no high-performance start-up tip. The size of the displacement depends on the number of screws used; it is best to move evenly over a full pitch according to the number of screws.
  • the control of the device that is to say the control of feed, screw rotation and time of reversal, can take place electronically, for example via a microprocessor. Safety is guaranteed by slip clutches or torque monitoring combined with the electronic control.
  • the device according to the invention not only results in an effortless and exact clearing process, but also a substantial reduction in clearing time is achieved, which represents only a fraction of the time required for manual clearing.
  • the device can be used in various types of ceramic mass-processing extrusion presses, a preferred example for the production of clay bricks.
  • “Ceramic masses” are to be understood here in particular as loam and clay, with and without additives.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Press Drives And Press Lines (AREA)
EP91101607A 1990-05-18 1991-02-06 Vorrichtung zum Ausräumen des Presskopfs einer keramische Massen verarbeitenden Strangpresse Expired - Lifetime EP0456962B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4016119 1990-05-18
DE4016119A DE4016119C1 (enrdf_load_stackoverflow) 1990-05-18 1990-05-18

Publications (3)

Publication Number Publication Date
EP0456962A2 EP0456962A2 (de) 1991-11-21
EP0456962A3 EP0456962A3 (en) 1992-04-15
EP0456962B1 true EP0456962B1 (de) 1994-10-19

Family

ID=6406767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101607A Expired - Lifetime EP0456962B1 (de) 1990-05-18 1991-02-06 Vorrichtung zum Ausräumen des Presskopfs einer keramische Massen verarbeitenden Strangpresse

Country Status (3)

Country Link
EP (1) EP0456962B1 (enrdf_load_stackoverflow)
AT (1) ATE113002T1 (enrdf_load_stackoverflow)
DE (2) DE4016119C1 (enrdf_load_stackoverflow)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE520917C (de) * 1931-03-14 Th Groke Akt Ges Ziegelstrangpresse fuer Hohlsteine
US2979768A (en) * 1957-02-21 1961-04-18 Robert F Schnee Apparatus for extrusion of plastics
DE2413844B2 (de) * 1974-03-22 1976-01-22 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Breitschlitzduesenkopf fuer extruder

Also Published As

Publication number Publication date
ATE113002T1 (de) 1994-11-15
DE4016119C1 (enrdf_load_stackoverflow) 1991-07-25
EP0456962A3 (en) 1992-04-15
DE59103259D1 (de) 1994-11-24
EP0456962A2 (de) 1991-11-21

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