EP0548861B1 - Vis assemblée pour une extrudeuse utilisée dans l'industrie des céramiques - Google Patents

Vis assemblée pour une extrudeuse utilisée dans l'industrie des céramiques Download PDF

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Publication number
EP0548861B1
EP0548861B1 EP92121657A EP92121657A EP0548861B1 EP 0548861 B1 EP0548861 B1 EP 0548861B1 EP 92121657 A EP92121657 A EP 92121657A EP 92121657 A EP92121657 A EP 92121657A EP 0548861 B1 EP0548861 B1 EP 0548861B1
Authority
EP
European Patent Office
Prior art keywords
screw
worm
pointed
head
teeth
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.)
Revoked
Application number
EP92121657A
Other languages
German (de)
English (en)
Other versions
EP0548861A1 (fr
Inventor
Frank Dipl.-Ing. Händle
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.)
HAENDLE GMBH
Original Assignee
Handle & Co KG 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
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Application filed by Handle & Co KG GmbH filed Critical Handle & Co KG GmbH
Priority to DE9219197U priority Critical patent/DE9219197U1/de
Publication of EP0548861A1 publication Critical patent/EP0548861A1/fr
Application granted granted Critical
Publication of EP0548861B1 publication Critical patent/EP0548861B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/24—Extrusion presses; Dies therefor using screws or worms
    • B30B11/246—Screw constructions
    • 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
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B28B3/222—Screw or worm constructions

Definitions

  • the invention relates to the use of a screw with the features specified in claim 1.
  • Extruders are used in the ceramic industry with which strands are initially formed from the plastic molding compounds from which ceramic products are fired.
  • the molding compound in the extruder is conveyed through a single screw into a press head and compacted in the process; the press head continues into a mouthpiece, from which a strand emerges from the molding compound.
  • the snail is surrounded by a snail cylinder.
  • the molding compound does not flow uniformly in this, rather the molding compound is more strongly promoted at the end of the catchable screw on the driving side of the screw than on the back, which is why speed-dependent pressure fluctuations occur in the screw cylinder.
  • Another option is to design the shaft as a square, hexagonal or octagonal profile.
  • Another known possibility is to provide a number of axially parallel bores in which cylindrical pins are inserted on a pitch circle on the facing end faces of the hubs of the pointed-head worm and single-start worm.
  • the holes In view of the fact that the torque that occurs on the screw during conveying must be transmitted with the pins, the holes must be arranged extremely precisely, which becomes more difficult the more holes are required.
  • a screw is known in which four bores are arranged on the pitch circle and more than eight to a maximum of twelve bores should not be possible in practice.
  • a composite screw for a plastic injection molding machine consisting of a plasticizing screw and a head screw, which are detachably connected to each other by a rigid, form-fitting coupling, the connection being made by means of spur gear teeth the mutually facing ends of the hubs of the screw parts is effected.
  • the head screw is intended for replacement if it is worn out by processing filled plastics or if the head pressure during injection molding is to be adapted to the respectively required procedural conditions by means of a head screw with a changed slope.
  • adjusting the angular position of the head screw relative to the plasticizing screw is not provided, but is undesirable in order to avoid dead space.
  • the object of the invention is therefore to achieve a more uniform flow of the molding compound in the press head of the extruder, which flow is accompanied by fewer pressure fluctuations.
  • the catchable worm and the pointed worm are via a spur toothing, in particular via a Hirth serration, positively connected and clamped together in the axial direction.
  • the smallest angle of rotation by which the pointed worm can be adjusted compared to the single worm is determined by the tooth pitch or the number of teeth.
  • teeth numbers of 24, 36 or even 48 can easily be achieved.
  • the optimal position of the pointed worm relative to the catchable worm can be set much more precisely than with known worms.
  • the pointed worm can be adjusted in steps of 10 °, with 48 teeth in 7.5 ° steps.
  • the adjustment is very easy to do: all that needs to be done is to loosen an axially extending screw bolt, through which the pointed worm and the single-start worm are clamped together, at least by the tooth height; the pointed worm can then be turned and the screw bolt tightened again.
  • the screw bolt is tightened, the pointed worm is automatically centered by the intermeshing of the spur toothing.
  • a special wear of the spur gear is not to be expected, since it introduces the torques that occur into a relatively large area, and dirt that can penetrate into the spur gear when the coupling is released can be easily removed if necessary, because the spur gear is easily accessible is.
  • the Hirth serration can be attached in the form of rings to the hubs of the catchy worm and the pointed worm.
  • the rings with the end faces of the Hubs are screwed.
  • the rings are preferably welded to the end faces of the hubs.
  • the spur toothing enables the user of an extruder to adapt the optimal position of the pointed screw in relation to the single screw for his particular application, in particular to the type of molding compound to be processed. This minimizes the pressure fluctuations in the press head and optimizes the uniformity of the flow. In this way, the quality of the ceramic products to be burned from the strand can be increased.
  • Figure 1 shows a composite screw consisting of a single-start screw 1 and a two-start pointed screw 2 in its housing 3, which is part of an extruder that is used in the ceramic industry, for example in brick factories.
  • the assembled screw is on a worm shaft 4 with which it is non-rotatably connected, expediently with a feather keyway.
  • the helix 5 of the single-start screw 1 has a larger diameter than in the front area, where the screw is surrounded by the screw cylinder 6.
  • the feed zone 7 in which the molding compound which is to be conveyed and compressed by the screw is fed.
  • the single-start worm 1 and the pointed worm 2 are connected to one another by a coupling 8, which comprises two rings 9 and 10 with end teeth 11.
  • a coupling 8 which comprises two rings 9 and 10 with end teeth 11.
  • One ring 9 is welded onto the front end face of the hub 12 of the single-start worm, while the other ring 10 is welded onto the rear end face of the hub 13 of the pointed-head worm.
  • the pointed worm and the single-start worm are clamped together by a screw bolt, which is screwed into the front end of the worm shaft 4 through an axial bore 14 in the pointed worm from the tip thereof.
  • This screw bolt is released when the pointed worm screw 2 is to be turned relative to the single-screw screw 1.
  • the pointed-head worm 2 is positioned such that the trailing edge 15 of the helix 5 of the single-start worm lies approximately in the middle between the leading edges 16 and 17 of the two helices 18 and 19 of the pointed-head worm 2.
  • a pointed-head screw with more than two courses could be used. This allows pressure fluctuations in the flow rate to be compensated even further, albeit at the price of an increased energy requirement and an increase in the number of cut textures in the strand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Claims (4)

  1. Utilisation d'une vis sans fin combinée, constituée d'une vis (1) à pas unique et d'une vis (2) à pas double ou multiple et à tête pointue, lesquelles vis sont reliées mutuellement et de manière détachable par un accouplement géométrique, rigide (8), et qui peuvent, après désunion de cet accouplement (8), être réassemblées dans différentes positions angulaires de rotation, la vis (1) à pas unie et la vis (2) à tête pointue étant munies aux extrémités orientées l'une vers l'autre de leurs moyeux (12, 13) de dentures droites (11) qui s'engrènent mutuellement,
       cette utilisation étant prévue pour une extrudeuse en vue du traitement de masses de moulage pour produits céramiques.
  2. Utilisation selon la revendication 1, caractérisée en ce que l'accouplement (8) est constitué par un crantage Hirth.
  3. Utilisation selon les revendications 1 ou 2, caractérisée en ce que la denture droite (11) est réalisée sur des bagues (9, 10) lesquelles sont fixées par soudage sur le moyeu (12) de la vis (1) à pas unique et sur le moyeu (13) de la vis (2) à tête pointue.
  4. Utilisation selon l'une des revendications précédentes, caractérisée en ce que sur chaque côté de la denture droite (11) sont prévues au moins 24 dents, de préférence 36 ou 48 dents.
EP92121657A 1991-12-23 1992-12-19 Vis assemblée pour une extrudeuse utilisée dans l'industrie des céramiques Revoked EP0548861B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9219197U DE9219197U1 (de) 1991-12-23 1992-12-19 Zusammengesetzte Schnecke für einen Extruder für die keramische Industrie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142653 1991-12-23
DE4142653A DE4142653A1 (de) 1991-12-23 1991-12-23 Zusammengesetzte schnecke fuer einen extruder fuer die keramische industrie

Publications (2)

Publication Number Publication Date
EP0548861A1 EP0548861A1 (fr) 1993-06-30
EP0548861B1 true EP0548861B1 (fr) 1996-09-11

Family

ID=6447937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121657A Revoked EP0548861B1 (fr) 1991-12-23 1992-12-19 Vis assemblée pour une extrudeuse utilisée dans l'industrie des céramiques

Country Status (2)

Country Link
EP (1) EP0548861B1 (fr)
DE (3) DE4142653A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010003416U1 (de) 2010-03-10 2010-05-27 Coperion Gmbh Extruder und Schnecken-Welle für einen Extruder

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044776A1 (de) * 2000-09-09 2002-04-04 Wolfgang Richter Zweigeteilte Pressschnecke
GB2431704B (en) * 2005-10-26 2008-12-03 Cooper Cameron Corp Replaceable hirth coupling component
DE102008021935A1 (de) * 2008-05-02 2009-11-05 Olaf Grimmel Schneckenpresse
DE102008028289B4 (de) 2008-06-16 2021-07-15 Leistritz Extrusionstechnik Gmbh Extruderschnecke sowie Extruder umfassend mindestens eine solche Extruderschnecke
CN103753694A (zh) * 2014-01-03 2014-04-30 程玉全 排除发热断带式増压双线挤出绞刀
CN113732567B (zh) * 2021-09-15 2022-08-23 中机智能装备创新研究院(宁波)有限公司 复合钎料摩擦挤压制备装置及制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE162710C (fr) *
GB310680A (en) * 1928-05-23 1929-05-02 Percy Vavasseur Appleby Improvements in or relating to feed or pressure worms, applicable for use in oil-pressing apparatus or the like
FR746987A (fr) * 1932-12-06 1933-06-09 Perfectionnement apporté dans l'établissement des étireuses-mouleuses destinées à l'industrie céramique
DE1779711A1 (de) * 1968-09-14 1971-09-09 Eckert & Ziegler Gmbh Spritzgiessmaschine
US3880267A (en) * 1973-02-12 1975-04-29 Gleason Works Coupling device having means for relieving circumferential stresses
DE3714506A1 (de) * 1987-04-30 1988-11-10 Wilfried Schraufstetter Formschluessige verbindung zweier koaxialer wellenteile, insbesondere hohlwellenteile
DE9115931U1 (de) * 1991-12-23 1992-02-27 Händle GmbH & Co. KG., 7130 Mühlacker Zusammengesetzte Schnecke für einen Extruder für die keramische Industrie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010003416U1 (de) 2010-03-10 2010-05-27 Coperion Gmbh Extruder und Schnecken-Welle für einen Extruder

Also Published As

Publication number Publication date
DE9219197U1 (de) 1999-12-30
DE4142653A1 (de) 1993-06-24
EP0548861A1 (fr) 1993-06-30
DE59207125D1 (de) 1996-10-17

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