WO1990005584A1 - Tete de melange - Google Patents

Tete de melange Download PDF

Info

Publication number
WO1990005584A1
WO1990005584A1 PCT/DE1989/000711 DE8900711W WO9005584A1 WO 1990005584 A1 WO1990005584 A1 WO 1990005584A1 DE 8900711 W DE8900711 W DE 8900711W WO 9005584 A1 WO9005584 A1 WO 9005584A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixing
section
head according
mixing chamber
mixing head
Prior art date
Application number
PCT/DE1989/000711
Other languages
German (de)
English (en)
Inventor
Adolf BÜTTNER
Original Assignee
I. Büttner Technischer Grosshandel
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 I. Büttner Technischer Grosshandel filed Critical I. Büttner Technischer Grosshandel
Publication of WO1990005584A1 publication Critical patent/WO1990005584A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/405—Mixing heads

Definitions

  • the invention relates to a mixing head for mixing at least two flowable components with a housing having a hollow cylindrical mixing chamber, with at least two inlet openings in the housing for the access of the components at one end of the mixing chamber, with at least one outlet opening for the mixture at the other end of the Mixing chambers and with an arranged in the mixing chamber, rotatably mounted mixing device, which consists of a first and an adjoining second section, the first section of the mixing device having at least one spiral indentation and the second section stirring arms.
  • Mixing heads of the type mentioned are known and e.g. in U.S. Patent 4,778,659. They are used to mix two or more components, which, however, must be liquid. If pasty or highly viscous media are to be mixed with the mixing heads, there is a risk that the material to be mixed will not be mixed sufficiently, since it rotates in the mixing chamber at the speed of rotation of the mixing device.
  • the object of the invention is to create a mixing head, where pasty or viscous components can be mixed in a very short time.
  • a guide element with an end wall is arranged between the two sections, via which the mixed components are transferred into the region of the wall of the mixing chamber.
  • the invention is implemented in any case when the mixing head has a mixing device consisting of two parts or sections, each part or section of which is arranged in its own mixing chamber and exerts rotary movements.
  • the first section of the mixing device (removal and conveying section) essentially serves to receive the components supplied from containers, cartridges, bottles or the like in the mixing head and to convey them in the direction of the outlet opening.
  • the components are mixed, especially when it comes to liquids. If, on the other hand, components are made of viscous or rubber-like materials, such as silicone, then a good mixing of the components cannot be assumed, but rather they are fed to the stirring section in small portions, where the actual mixing takes place.
  • a guide element or control element which deflects the components which move approximately in the axial direction to the inner wall of the mixing chamber, in which they are then conveyed further in the direction of the outlet opening.
  • the components are recorded there by the Ruhr section and thoroughly mixed together. Since other components get into the mixing head, the components located in the area of the mixing head are conveyed forward, ie to the outlet.
  • a particularly advantageous embodiment of the invention provides that the inlet openings on the housing are aligned radially and open into the first section of the mixing chamber and that the removal and conveying section is designed as a twist drill.
  • the twist drill works with a drive device, e.g. an electric motor, and is rotated so that the media are transported to its free end and towards the outlet. If the grooves of the drill have a right-hand twist, then this is rotating to the left, while with a left-hand twist the drill is rotating to the right. It is advisable to use a drill with several flutes with a large rake angle. As a result, portioning can already occur in the initial phase, in which the components enter the mixing head. The components alternate in layers in the flutes, in the direction from one end of the drill to the other.
  • the thickness of the layers is relatively large, which is not a disadvantage in such cases.
  • a drill with a large rake angle is used in particular when at least one of the components has silicone-like properties. In such cases it is usually important that the smallest possible portions of components are fed to the stirring section.
  • Another advantageous embodiment of the invention provides that the Ruh rabs chni tt has outgoing mixing arms with knives, the cutting edges of which are arranged at a short distance from the inner wall of the mixing chamber. These measures can also be taken so that the ends of the knives taper towards the inner wall.
  • the cutting edges lie in planes that intersect the axis of rotation at an angle that is less than 90 °.
  • the stirring section is therefore designed in such a way that it can scrape or shear off the components designed as a coating on the inner wall of the mixing chamber and at the same time convey it to the outlet.
  • the task of the stirring section is therefore fulfilled in any case if it e.g. behaves like a milling cutter, the cutting edges of which are arranged at a short distance from the inner wall of the mixing chamber.
  • the size of the distance of the cutting edge from the inner wall depends on which media are mixed with one another. This distance can be minimal in the case of low-viscosity media, whereas it is larger for viscous liquids.
  • the guide element has the shape of a baffle plate. It is particularly advantageous here if the baffle plate is a circular disk whose outer diameter is slightly smaller than the inner diameter of the mixing chamber.
  • the function of the baffle plate is that of the first, designed as a removal and conveying section To redirect section coming medium so that it is guided along the inner wall surrounding the stirring section.
  • the diameter of the disc is also a function of the medium and therefore depends on the density of the liquids.
  • Fig. 3 is a section along the line III-III of Fig. 1 and
  • a mixing head 10 for mixing at least two flowable components with an inlet openings 12 and 14 for the components having housing 16 and a mixing device 20 and arranged in the housing 16 mixing chamber is shown, which communicates with the inlet openings 12 and 14 and has an outlet opening 22 for the medium escaping from the mixing chamber 24.
  • the mixing chamber 24 is hollow cylindrical educated.
  • the mixing device 20, which is rotatably mounted in the mixing chamber 24, has a removal and conveying section 30 which cooperates with the inlet openings 12 and 14 and which transports the components to the outlet opening 22 and which in the present case is designed as a twist drill.
  • the mixing device also has a stirring section 32 which adjoins this removal and conveying section 30 and which cooperates with the outlet opening 22.
  • a guide element is arranged between the two sections 30 and 32, through which the components enter the region of the cylindrical inner wall 40 which forms the stirring section 32 surrounds. It can be seen that the inlet openings 12 and 14 are aligned radially with respect to the cylindrical mixing chamber 24.
  • the stirring section 32 has arms extending from its axis of rotation 50 with knives 52, 54, 56 and 58, the cutting edges 60, 62, 64 and 66 of which are arranged at a short distance from the inner wall 40 of the mixing chamber 24.
  • the ends of the knives 52 and 54 taper towards the inner wall 40.
  • the cutting edges 60, 62, 64 and 66 lie in planes which intersect the axis of rotation 50 at an angle which is less than 90 °.
  • the guide element 36 has the shape of a circular baffle plate, the outer diameter of which is slightly smaller than the inner diameter of the mixing chamber 24.
  • the baffle plate 36 is arranged at a distance from the removal and conveying section 30, so that a storage space 70 is formed between it and this section.
  • the outer envelope of the axial cross-section of the baffle plate could, however, also be frustoconical and taper towards the removal and conveying section. Such an embodiment of the baffle plate would be for viscous Media advantageous.
  • the two sections 30 and 32 are formed in one piece, but they could also consist of two non-rotatably connectable parts that could be connected to one another by a shaft section 72. There are a number of options for the connection.
  • the shaft section 72 could be integrally connected to the first or second section; however, it could also be a separate component that could be inserted into the axially extending blind hole of the two sections and would have a cross-section that is different from the circle.
  • the flutes 80 and 81 have a semicircular inner contour and end in cutting edges 84 and 86. Particularly sharp cutting edges are expedient and advantageous if one of the components is silicone, for example. In this case, it is useful if the flutes extend over an angle that is greater than 180 °.
  • FIG. 1 shows that the knives not only protrude radially, but are also arranged at a distance from one another, as seen in the axial direction. This creates sets of - here - four knives each, which behave like milling. The distance between the individual sets of knives can vary and is also dependent on the medium.
  • the mixing head is connected via its shaft extension 90 to a drive device, for example an electric motor, and medium is fed into the inlet openings 12 and 14, then the cutting edge 86 or 84 first detects the medium fed into the inlet opening 12 or 14.
  • the medium located in the flute 81 and fed through the inlet opening 12 is displaced downward by the rotary movement, so that this section of the flute is cleared is before it appears in the area of the inlet opening 14 or 12, where the cutting edge 86 cooperate with the medium supplied through the inlet opening.
  • the chip groove 81 or 80 is thereby filled with at least two media which move in the axial direction.
  • several inlet openings can also be provided, so that not two, but three or more layers alternate.
  • the particular advantage of the mixing head in question here is that the components get into the mixing space within a very short time, where they are optimally mixed. Since both the transport time and the time for mixing are very short, there is no appreciable increase in the temperature of the components. It is known that temperatures can accelerate the setting process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Une tête de mélange pour mélanger au moins deux constituants coulants comporte une enveloppe avec une chambre cylindrique creuse de mélange. Cette enveloppe possède au moins deux ouvertures permettant l'admission des constituants à une extrémité de la chambre de mélange et au moins une ouverture de sortie du mélange à l'autre extrémité de la chambre de mélange. Un dispositif de mélange monté rotatif et comportant une première section et une deuxième section reliée à cette dernière, est disposé dans la chambre de mélange. La première section possède au moins une encoche en spirale et la deuxième section présente des bras d'agitation. Entre les deux sections se trouve un élément de guidage avec une paroi d'extrémité, laquelle achemine les constituants mélangés vers la région de la paroi de la chambre de mélange.
PCT/DE1989/000711 1988-11-15 1989-11-14 Tete de melange WO1990005584A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3838593.7 1988-11-15
DE19883838593 DE3838593C1 (fr) 1988-11-15 1988-11-15

Publications (1)

Publication Number Publication Date
WO1990005584A1 true WO1990005584A1 (fr) 1990-05-31

Family

ID=6367162

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1989/000711 WO1990005584A1 (fr) 1988-11-15 1989-11-14 Tete de melange

Country Status (2)

Country Link
DE (1) DE3838593C1 (fr)
WO (1) WO1990005584A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6726355B2 (en) * 2001-12-20 2004-04-27 Mirolin Industries Corporation Self-cleaning mix head having a longitudinal mixer for a molding system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60300822T2 (de) * 2003-08-14 2006-04-13 3M Espe Ag Mischelement für einen Mehrkomponentenpastenmischer, und Mischer mit diesem Mischelement
JP4413561B2 (ja) * 2003-09-01 2010-02-10 株式会社ジーシー 歯科用印象材用撹拌ミキサー
EP1640060A1 (fr) 2004-09-22 2006-03-29 3M Espe Ag Mélangeur pour pâtes multi-composants, kit, et méthode pour mélanger des pâtes
EP1802385B1 (fr) 2004-09-22 2008-01-23 3M Espe AG Mélangeur pour pâtes à composants multiples, kit et procédé de mélange de composants de pâte

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH488485A (de) * 1968-06-04 1970-04-15 Dynamit Nobel Ag Verfahren zum kontinuierlichen Mischen von Phenolharz für Schäumzwecke mit Feststoffen und/oder Flüssigkeiten
CH492472A (de) * 1968-06-04 1970-06-30 Dynamit Nobel Ag Verfahren zum kontinuierlichen Mischen von Phenolharz für Schäumzwecke mit nichtlöslichen Feststoffen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408887A (en) * 1981-12-07 1983-10-11 Kishihiro Yamaoka Continuous kneader
DE3669266D1 (de) * 1985-07-23 1990-04-12 Matsushita Electric Ind Co Ltd Mischmethode fuer reaktions-ausgangsmaterial und apparat dafuer.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH488485A (de) * 1968-06-04 1970-04-15 Dynamit Nobel Ag Verfahren zum kontinuierlichen Mischen von Phenolharz für Schäumzwecke mit Feststoffen und/oder Flüssigkeiten
CH492472A (de) * 1968-06-04 1970-06-30 Dynamit Nobel Ag Verfahren zum kontinuierlichen Mischen von Phenolharz für Schäumzwecke mit nichtlöslichen Feststoffen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6726355B2 (en) * 2001-12-20 2004-04-27 Mirolin Industries Corporation Self-cleaning mix head having a longitudinal mixer for a molding system

Also Published As

Publication number Publication date
DE3838593C1 (fr) 1990-05-31

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