EP1669132A2 - Mischkopf - Google Patents
Mischkopf Download PDFInfo
- Publication number
- EP1669132A2 EP1669132A2 EP05388106A EP05388106A EP1669132A2 EP 1669132 A2 EP1669132 A2 EP 1669132A2 EP 05388106 A EP05388106 A EP 05388106A EP 05388106 A EP05388106 A EP 05388106A EP 1669132 A2 EP1669132 A2 EP 1669132A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixer
- mixer head
- head
- rotation
- mixing
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0893—Mobile mixing devices, e.g. hanging
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/50—Movable or transportable mixing devices or plants
- B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
- B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
-
- 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
- B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis
- B01F27/11451—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis forming open frameworks or cages
-
- 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
- B01F27/117—Stirrers provided with conical-shaped elements, e.g. funnel-shaped
Definitions
- the present invention relates to a mixer head for a portable power-driven compulsory mixer, said mixer head comprising a first end remote from the mixer, a second end near the mixer and an axis of rotation, the mixer head further comprising mixing means arranged between the first end and the second end.
- the mixer head as mentioned in the introduction is characterised in that the mixer head by rotation about the axis of rotation defines a working space having the shape of a truncated cone with a diameter at the first end being smaller than a diameter at the second end.
- a mixer head having this geometry is found to provide convincing results with regard to efficiency of mixing materials having relatively low miscibility.
- the truncated cone may have any suitable conicity, however according to an embodiment, the truncated cone has a conicity of between 1 and 15°, preferably in the interval of 7-11°, which is found to provide a fair compromise. Further this conicity is relatively close to the conicity of common bricklayer's buckets, so a person using a mixer having a mixer head with a conicity within this range does not need to tip the mixer to follow the contour of the bucket wall. This both enhances the efficiency of mixing, as the risk of un-mixed materials near the bucket wall is reduced, and relieves the user of tiring work postures.
- the mixer head may be provided with any type of mixing means, such as paddles or the like. According to an embodiment, however, the mixing means comprises at least one helical strip, which provides a good mixing at a modest manufacturing cost.
- the at least one helical strip may have an edge remote from the central axis of rotation, said edge being arranged to closely follow the envelope surface of the truncated cone.
- the mixer head may be made of any suitable material, such as a plastic material, but in an embodiment the mixer head is made of metal, which will provide a wear resistant mixer head.
- the mixer head may further comprise a ring element at the first end.
- a mixer having such a mixer head will be more easy to hold, as the mixer will be less prone to vibrate.
- the mixer head may comprise a ring element at the second end. Further such a ring will further reduce the risk of vibration of the mixer, as the outer contour of the mixer head would be round with no irregularities.
- the mixer head may be provided with a coupling for connection to a separate shaft. According to an embodiment, however, the mixer head comprises a shaft arranged at the axis of rotation for rotation of the mixer head. Such a mixer head with a shaft will facilitate being driven by a power-drill or a power-mixer.
- the prior art mixer head 100 illustrated in Fig. 1 is of cylindrical outline.
- the mixer head 100 with cylindrical outline is however found to have some disadvantages when used with a portable power-driven compulsory mixer 2 as seen in Fig. 2.
- the mixer if the mixer is used to mix a material 21 in a vessel 14 having inclined walls, such as a bricklayer's bucket, the operator must tilt the mixer to follow the wall. Otherwise there is a risk of residual material at the vessel walls as indicated by 101, i.e. poor mixing.
- the mixer is tilted, there is an increased risk of splash from the mixer head, i.e. a risk of material being splashed around and out of the vessel due to centrifugal force as illustrated by 102.
- the operator must carefully work round the vessel in a tiring work posture with a tilted mixer. Moreover the resulting work circle is relatively large as will be understood from Fig. 2.
- a mixer head 1 In Fig. 3 is seen a mixer head 1 according to the invention.
- the mixer head 1 has a first end 3 remote from a mixer 2 and a second end near the mixer 2, as can be seen in Fig. 4.
- the diameter At the first end 3 of the mixer head 1 the diameter is d, whereas at the second end 4, the diameter is D, and as can be seen D>d.
- the mixer head 1 By rotation of the mixer head 1 about the axis of rotation 5 by means of a shaft 15, the mixer head 1 defines a working space having the shape of a truncated cone as schematically illustrated.
- the truncated cone has a conicity a, which is somewhat exaggerated in the drawing to illustrate the principle.
- the mixer head 1 can be used with a portable power-driven compulsory mixer 2 of the type widely used for mixing cement, mortar, concrete, adhesives, paint and the like, especially by bricklayers at building sites.
- a mixer 2 having handles 20 and incorporating the mixer head 1 of the invention is illustrated in Fig. 4.
- the mixer 2 and mixer head 1 is used in a conical vessel 14, such as a common bricklayer's bucket, to mix a material 21.
- Such buckets are widely used and come in different sizes, however all more or less conical in shape. Typically the smallest buckets have the largest conicity, and the widely used 10-liter bucket has a conicity of approximately 10°.
- Fig. 5 is seen an embodiment of the mixer head 1 in sectional view.
- the mixer head comprises a shaft 15 (only a small portion illustrated) by which the mixer head is rotated.
- a spoke 18 connects the shaft 15 to a first ring element 8, and correspondingly a spoke 17 connects the shaft 15 to a second ring element 9, which will provide a very rigid and robust construction. If the requirement for robustness is less strict, it may be enough to connect the shaft 15 to one of the spokes 17, 18. It is currently preferred to have an open ring element 8, 9, but a disk could be used as an alternative, although mixing is expected to be less efficient.
- the mixer head 1 illustrated in Fig. 5 comprises a helical strip element 6, which travels from one end of the spoke 17 to an opposite end of the spoke 18. A similar further helical strip element would normally be provided, but is left out in the drawing for the sake of clarity.
- the helical strip element 6 defines a working space having the shape of a truncated cone with an envelope surface 16.
- the helical strip element 6 is shaped so an outer edge 10 of the strip element 6 will closely follow the envelope surface 16.
- the helical strip element shown is particularly useful, but other types of mixing means could be used, such as arms projecting from the shaft or the like.
- the helical strip element may have any width, based among other factors on a compromise between mixing efficiency and power consumption.
- the conicity of the mixer head 1 could be chosen to closely match the conicity of the most widely used vessel. Alternatively a set of mixer heads 1 with different conicity within the normal range of up to 20° could be provided, so the operator would be able to find a suitable mixer head for any vessel. Currently a range of conicity of the mixer head 1 in the interval of approximately 7-11° is preferred, as the walls of bricklayer's buckets normally differ from a cylindrical shape by 8-10°. It will be appreciated that by choosing a mixer head having a conicity larger than the vessel, the circle the operator must operate will become smaller, which may be an advantage in some cases, so a mixer head having a conicity of e.g. 15° or 20° could be used.
- a prototype of the invention comprised a mixer head having a length of 14 cm between the first end and the second end.
- the diameter D of the second end was 10 cm, whereas the diameter d of the first end was 8 cm.
- the mixer head with these dimensions was found to provide good mixing efficiency with a portable power-driven mixer when used in a 10 I bucket.
- the mixing means may be arranged to impart an upward or downward motion to the material to be mixed, or be adapted to impart both upward and downward motion at the same time. Further the mixing means may be arranged for rotation clockwise or counter-clockwise. Moreover it will be evident to the skilled person that two or more mixing heads may be arranged to be driven by a common mixer.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Food-Manufacturing Devices (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200401916 | 2004-12-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1669132A2 true EP1669132A2 (de) | 2006-06-14 |
EP1669132A3 EP1669132A3 (de) | 2006-06-21 |
Family
ID=35986251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05388106A Withdrawn EP1669132A3 (de) | 2004-12-10 | 2005-12-07 | Mischkopf |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1669132A3 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1256374A2 (de) | 2001-05-11 | 2002-11-13 | TTS Tooltechnic Systems AG & Co. KG | Rührgerät |
DE10251109A1 (de) | 2002-11-02 | 2004-05-19 | Tts Tooltechnic Systems Ag & Co. Kg | An einem Rührstab angeordneter oder anzuordnender Rührkopf |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3185451A (en) * | 1963-03-08 | 1965-05-25 | Joseph A Snyder | Aggregate mixer construction |
US3249342A (en) * | 1964-07-14 | 1966-05-03 | Laurits A Mikkelsen | Mixer |
US5865539A (en) * | 1997-09-30 | 1999-02-02 | Rogers; Mike | Rotary mixing device for fluidic material |
-
2005
- 2005-12-07 EP EP05388106A patent/EP1669132A3/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1256374A2 (de) | 2001-05-11 | 2002-11-13 | TTS Tooltechnic Systems AG & Co. KG | Rührgerät |
DE10251109A1 (de) | 2002-11-02 | 2004-05-19 | Tts Tooltechnic Systems Ag & Co. Kg | An einem Rührstab angeordneter oder anzuordnender Rührkopf |
Also Published As
Publication number | Publication date |
---|---|
EP1669132A3 (de) | 2006-06-21 |
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18D | Application deemed to be withdrawn |
Effective date: 20080624 |