EP0474538B1 - Schraubenmischer - Google Patents

Schraubenmischer Download PDF

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Publication number
EP0474538B1
EP0474538B1 EP91402306A EP91402306A EP0474538B1 EP 0474538 B1 EP0474538 B1 EP 0474538B1 EP 91402306 A EP91402306 A EP 91402306A EP 91402306 A EP91402306 A EP 91402306A EP 0474538 B1 EP0474538 B1 EP 0474538B1
Authority
EP
European Patent Office
Prior art keywords
screw
support blades
screw mixer
blades
knives
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
EP91402306A
Other languages
English (en)
French (fr)
Other versions
EP0474538A1 (de
Inventor
Jacques Audureau
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.)
AUDUREAU
Original Assignee
AUDUREAU
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 AUDUREAU filed Critical AUDUREAU
Publication of EP0474538A1 publication Critical patent/EP0474538A1/de
Application granted granted Critical
Publication of EP0474538B1 publication Critical patent/EP0474538B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/22—Crushing mills with screw-shaped crushing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall

Definitions

  • the present invention relates to a screw mixer.
  • Screw mixers comprising a box comprising at least one cylindrical wall part and at least one screw comprising a helical drive wall fixed to a shaft mounted to rotate coaxially with the cylindrical wall part of the box, in order to drive products introduced into the box in an axial direction of the shaft and cause a mixture of these products as they advance.
  • Mixers of this type generally comprise three parallel screws arranged in a triangle having a point directed downwards, the screws having alternating pitches in order to cause a circular movement favoring the mixing inside the box.
  • the screw mixers are used in particular for the preparation of animal feed from different components, such as fodder, pellets, beets ...
  • the outer edge of the helical drive wall is slightly spaced from the internal surface of the cylindrical wall part so that the screw ensures not only mixing, but also grinding of the various ingredients.
  • this grinding proves to be insufficient in the case where the products introduced into the box are massive products, such as beets, or very elongated products such as fodder.
  • Also known from document FR-A-2,570,635 is a mixing screw ensuring improved grinding and comprising for this purpose knives mounted at the periphery of the helical drive wall.
  • knives mounted at the periphery of the helical drive wall.
  • the drive wall of which has an outer edge which is strongly recessed from the opposite cylindrical wall so that the material is drawn irregularly into the axial direction.
  • An object of the invention is to provide a screw mixer ensuring a further improved grinding of the products introduced into the mixer.
  • a screw mixer of the aforementioned type is proposed according to the invention in which the knives are mounted on support blades fixed to the helical drive wall downstream thereof with reference to a direction of movement of the driven material, the support blades being spaced from the drive wall of the screw.
  • the material to be ground is driven in the axial direction continuously and regularly and is therefore ground regularly by the knives.
  • the support blades form an acute angle with the helical drive wall.
  • the products in the boxes are subjected to a pinching effect between the knives and the immediately adjacent helical drive wall. and the effect of grinding the knives is improved.
  • the support blades have an outer edge forming a divergent spiral by reference to a direction of rotation of the screw.
  • an improved pinching and grinding effect is also obtained during the rotation of the screw.
  • the mixer comprises several support blades angularly offset.
  • the force resulting from the grinding is distributed in a balanced fashion all around the drive shaft.
  • the cylindrical wall of the box in the vicinity of one end of the screw, has counterblades perpendicular to the shaft and carrying knives.
  • the counterblades have an internal edge forming a converging spiral with reference to a direction of rotation of the screw.
  • the screw mixer according to the invention comprises a box comprising a cylindrical wall part 1 and a screw comprising a helical drive wall 2 fixed to a shaft 3 mounted to rotate coaxially with the cylindrical wall part 1 of the box.
  • knives 4 are mounted on support blades 5 fixed on a downstream face 6 of the helical drive wall 2 by reference to a direction of movement of the entrained material symbolized by a thick arrow in Figure 1.
  • the support blades 5 are fixed to the downstream face 6 by a cylindrical plate 7 having a width which varies in an opposite direction to the direction of rotation of the helical wall 2, so that the support blades 5 do not extend parallel to the helical wall 2 but at an acute angle with it.
  • the support blades 5 have an outer edge 8 forming a divergent spiral with reference to a direction of rotation of the screw, so that the knives 4 are themselves arranged in a spiral which tends to increase the shearing effect on the products as the screw rotates.
  • the support blades 5 on different turns of the helical wall of the screw are angularly offset in order to balance the radial forces transmitted to the shaft during grinding.
  • the cylindrical wall part 1 of the box has counterblades 9 perpendicular to the shaft 3 and carrying knives 10.
  • the internal edge 11 of the counterblades 9 preferably forms a spiral convergent by reference to a direction of rotation of the screw in order to increase the shearing effect of the product between the knives 4 and the knives 10.
  • the knives 4 and the knives 10 are square knives fixed by a screw 12 in order to be able to turn the knives around the screw and to project outwards a sharp point of the knife.
  • mixer screw Although only one mixer screw has been shown, several mixer screws can be fitted with knives according to the invention.
  • the invention has been illustrated by a screw having a left pitch, the invention can be implemented on sections of screws having either a left pitch or a right pitch, the position of the knives being adapted to the direction of rotation of the screw.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (6)

  1. Schraubenmischer mit einem Gehäuse, das einen Teil einer zylindrischen Wand (1) umfaßt und einer Schraube, umfassend einen schraubenförmigen Fördersteg (2), der an einer Welle (3) befestigt ist, welche für eine Drehung koaxial zu dem Teil der zylindrischen Wand (1) des Gehäuses gelagert ist, und Messer, die an dem schraubenförmigen Födersteg befestigt sind, gekennzeichnet dadurch, daß die Messer (4) auf Messerträgern (5) angeordnet sind, die an dem schraubenförmigen Fördersteg (2) stromabwärts von letzterem mit Bezug auf die Bewegungssrichtung des geförderten Materials befestigt sind, wobei die Messerträger (5) einen Abstand von dem Fördersteg der Schraube haben.
  2. Schraubenmischer nach Anspruch 1, dadurch gekennzeichnet, daß die Messerträger (5) einen spitzen Winkel mit dem angrenzenden schraubenförmigen Fördersteg bilden.
  3. Schraubenmischer nach Anspruch 1 oder 2, gekennzeichnet dadurch, daß die Messerträger (5) einen äußeren Rand (8) haben, der mit Bezug zur Drehrichtung der Schaube eine divergierende Spirale bildet.
  4. Schraubenmischer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er mehrere Messerträger (5) trägt, die winkelförmig gegeneinander versetzt sind.
  5. Schraubenmischer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die zylindrische Wand (1) des Gehäuses in der Nähe des einen Endes der Schraube Gegenmesserträger (9) trägt, die senkrecht zur Welle angeordnet sind und Messer (10) tragen.
  6. Schraubenmischer nach Anspruch 5, dadurch gekennzeichnet, daß die Gegenmesserträger (9) einen inneren Rand (11) haben, der mit Bezug zur Drehrichtung der Schraube eine konvergierende Spirale bildet.
EP91402306A 1990-08-28 1991-08-23 Schraubenmischer Expired - Lifetime EP0474538B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010717 1990-08-28
FR9010717A FR2666247B1 (fr) 1990-08-28 1990-08-28 Melangeuse a vis.

Publications (2)

Publication Number Publication Date
EP0474538A1 EP0474538A1 (de) 1992-03-11
EP0474538B1 true EP0474538B1 (de) 1994-12-14

Family

ID=9399891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402306A Expired - Lifetime EP0474538B1 (de) 1990-08-28 1991-08-23 Schraubenmischer

Country Status (3)

Country Link
EP (1) EP0474538B1 (de)
DE (1) DE69105879T2 (de)
FR (1) FR2666247B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5433577A (en) * 1994-05-11 1995-07-18 Magnificent Machinery, Inc. Refuse bag opener
IT235773Y1 (it) * 1995-02-03 2000-07-18 Porello G Battista Benna miscalatrice di aggregati solidi e distributrice del miscelato.
US5732892A (en) * 1996-08-15 1998-03-31 J-Star Industries, Inc. Self-loading auger
KR100754425B1 (ko) 2006-08-16 2007-09-03 김동환 재생골재 및 부순모래 이동장치
KR101108738B1 (ko) 2008-10-14 2012-03-14 웅진코웨이주식회사 분쇄 스크류, 분쇄통 및 이를 구비하는 음식물 처리기의 분쇄로
KR101049350B1 (ko) 2008-10-14 2011-07-13 웅진코웨이주식회사 음식물 처리기의 분쇄로

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304496C (de) *
DE2702653A1 (de) * 1977-01-24 1978-07-27 Kloeckner Gmbh & Co Geb Tangentialer muehleneinlauf fuer eine rohrmuehle, die das mahlgut in axialer richtung durchwandert
FR2501130B1 (fr) * 1981-03-06 1986-03-21 Cacquevel Bernard Remorque distributrice et melangeuse
IT8463353U1 (it) * 1984-03-27 1985-09-27 Storti Ottorino Elementi di taglio applicabili su coclee trancianti di trasportatrici in particolar modo di materiali filamentosi insilati
US4993649A (en) * 1988-04-28 1991-02-19 Koenig Larry E Dual auger shredder

Also Published As

Publication number Publication date
DE69105879T2 (de) 1995-07-27
DE69105879D1 (de) 1995-01-26
FR2666247A1 (fr) 1992-03-06
FR2666247B1 (fr) 1992-11-27
EP0474538A1 (de) 1992-03-11

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