Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C9/00—Impression cups, i.e. impression trays; Impression methods
  • A61C9/0026—Syringes or guns for injecting impression material; Mixing impression material for immediate use
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C13/00—Dental prostheses; Making same
  • A61C13/20—Methods or devices for soldering, casting, moulding or melting
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
  • A61C5/62—Applicators, e.g. syringes or guns
  • A61C5/64—Applicators, e.g. syringes or guns for multi-component compositions
• • 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
  • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
  • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
  • B01F27/2712—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator provided with ribs, ridges or grooves on one surface
• • 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
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
  • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
  • B05C17/00503—Details of the outlet element
  • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
  • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
  • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
  • B05C17/00566—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components with a dynamic mixer in the nozzle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
  • B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application

Definitions

• the invention relates to an arrangement with low flow resistance, in particular for structurally viscous pastes such as dental materials of various consistencies, dynamic mixers suitable for this, mixer elements, the production of dental impression materials, and methods for mixing components of impression materials, in particular polyether impression materials, and the use of a chamber mixer.
• Multi-component mixing systems for product end users have become particularly popular in the dental field.
• these are hand-operated devices for double cartridges, in which the mixture of relatively small quantities and low viscosities is generated using a static mixer.
• materials from cartridges as well as plastic bags can be processed.
• the devices of this type which are now widely used in the dental field, are designed for two components in a mixing ratio of 5: 1.
• the mixing energy is generated by the rotating inner part of the mixer, which mixes the two components into a homogeneous mass as they flow through the mixing nozzle.
• EP 1 072 323 A1 also describes a mixing device for the dental field which can process components 1: 1 in addition to a ratio of 5: 1.
• the devices reach their performance limits when dispensing the substances
• the dynamic mixer generates undesirable heat input into the product due to the high friction.
• the reaction rate of the multi-component pastes is strongly dependent on the temperature. They are in a pasty state at room temperature for a sufficient period of time and then harden quickly to an elastomer due to the temperature increase in the mouth.
• the different heat input during mixing for each device type leads to the build-up of elastomeric components outside the oral cavity, which can lead to a distorted impression.
• Impression materials that are used in the dental field are usually two-component compounds that crosslink at room temperature to give elastomeric reaction products. These compositions are predominantly based on crosslinkable silicones or on crosslinkable polyethers.
• the blades of which extend as far as possible to the wall of the mixing chamber the high peripheral speed that occurs there gives a good mixing effect in the outer region of the mixing chamber.
• the pumped paste can rotate like a plug together with the inner part of the mixer if there are no baffles ??
• the baffles common in apparatus construction are installed on the outside of the pipe or boiler.
• the dynamic mixers considered here are injection molded parts made of plastic for single use, which should consist of as few parts as possible and should be easy to manufacture.
• a baffle on the wall of the mixer housing cannot be produced with simple injection molds.
• Extensions of the shaft diameter surrounding the mixing shaft have proven to be easy to design baffles. These diameter extensions projecting radially into the mixing chamber from the mixing shaft reduce the flow cross-section at this point, thus forcing the paste out of the plug flow and briefly increasing the flow speed and thus the shear at this point.
• chamber mixers are known from EP 1 426 099 A1.
• the chamber mixers have at least two inlet openings and one outlet opening and essentially extend between the inlet openings and the outlet openings, the number of chambers arranged one behind the other in the longitudinal direction generally being significantly greater than the number of the chambers perpendicular to the Chambers arranged along the longitudinal axis.
• the mixing quality of the pressed and mixed impression material can be assessed by cutting the paste strand emerging from the mixer at an early stage of crosslinking across the direction of flow. If the mixture is poor, lamellae are formed on the cutting surface due to the presence of layers of different crosslinking states.
• This invention is therefore based in particular on the task of developing a dynamic mixer for the existing mixing devices which compensates for fluctuations in the mixing ratio and at the same time mixes all the consistencies used in the dental field sufficiently well without developing excessive heat in the product.
• mixers in which there is a buffer chamber for receiving the multicomponent which initially emerges to a greater extent than required. There is no separation of the buffer and mixing chambers.
• the avoidance of the back hardening and the component delay are realized by a buffer chamber which has a deflection element between the inlet opening and the mixing chamber.
• Another preferred embodiment consists of devices in which part of the component is initially passed into a chamber which can only vent, but has narrow gaps or holes so that the paste cannot flow through it.
• This "dead" chamber is not a flow channel.
• a channel can be provided for introducing the second component in order to ensure the ratio of the two channels to one another. However, this reduces the restrained effect of the other channel / chamber.
• elongated channels such as in EP 0 993 863 / US 6,244,740, EP 1 029 585 and EP 1 099 470 / US 6,523,992 are dispensed with.
• a buffer chamber is used to collect the component entering in excess at the start of delivery, the total flow cross-section of which is significantly larger than that of the product inlet opening.
• At least part of the inlet opening can be covered by a fixed deflecting element.
• a buffer chamber which is filled by a special arrangement of the fixed deflecting element and is not suitable for material flow due to the small size of the ventilation opening at the end, already brings advantages for some consistencies.
• the cross-sectional area of the mixer shaft should not be more than 1/5 of the inner cross-section of the chamber part equipped with it. This means that at the points where the product flows through, the distance between Mixer shaft and chamber section are brought to at least 4 mm without unnecessarily increasing the outside diameter and thus the volume of contents.
• the individual mixing elements are advantageously kept so narrow that at least 40% of the inner cross-sectional area of the chamber can also be used as a flow cross-sectional area on the levels occupied by mixing elements.
• the mixing elements are expediently designed and arranged in such a way that they produce product flow which, in addition to being in the plane of rotation and direction of flow, is also directed against the flow and against the centrifugal force.
• a trapezoidal, triangular or comparable flow opening can be created by trapezoidal design or a corresponding rounding of part of the mixing elements, which alternately directs the product flow inwards and outwards.
• the mixer according to the invention can produce sufficient mixing qualities even at lower viscosities.
• the side of the mixing elements facing the chamber part can be at least partially chamfered or rounded off at its edge facing the direction of flow and rotation.
• a further improvement in the mixing quality is achieved in that the second component is also introduced into the mixing chamber over the entire available radial width of the surface of the closure part facing the mixing chamber.
• the inlet opening is expanded to a channel that extends as far as possible, more or less curved or kinked, from the mixer shaft opening to the chamber part.
• At least part of the mixing axis located between the mixing wing planes has an expansion 14, 15 which narrows the flow cross section the mixing axis.
• a dynamic mixer with an at least partially largely cylindrical chamber part, with a discharge opening at the front end of the chamber part with a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be introduced and a central opening for one in the chamber part is particularly suitable for dental materials of various consistencies
• Mixer shaft rotatable about its longitudinal axis, with at least two planes arranged axially one behind the other, each with at least two mixing vanes arranged radially one behind the other, at least part of the mixing axis located between the plane of the mixing vanes (9) having an expansion of the mixing axis that narrows the flow cross section.
• the flare 14 has a polygonal cross-sectional shape; ⁇ The widening 15 has a round cross-sectional shape.
• At least a part of the mixing axis located between the mixing wing planes has a wall running eccentrically in the radial direction.
• a dynamic mixer with an at least partially largely cylindrical chamber part, with a discharge opening at the front end of the chamber part, with a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be introduced and a central opening for one in the chamber part is particularly suitable for dental materials of various consistencies
• Mixer shaft rotatable about its longitudinal axis, with at least two planes arranged axially one behind the other, each with at least two mixing vanes arranged radially one behind the other, at least part of the mixing axle located between the plane of the mixing vanes having a wall running eccentrically in the radial direction.
• the mixing axis parts equipped with a non-centric circumference are largely oval and their cross-sectional center does not match that of the chamber part.
• the mixing axis parts equipped with a non-centric circumference are largely circular and their center point does not match that of the chamber part.
• the axially successive planes (ABCD, EFGH) of the mixing axis parts equipped with a non-centric circumference are radially offset from one another.
• a dynamic mixer with a chamber part, with a discharge opening at the front end of the chamber part, with a closure part arranged at the rear end of the chamber part with inlet openings for individual components to be introduced as well as a central opening for a rotatable in the chamber part about its longitudinal axis is particularly suitable for dental materials of various consistencies Mixer shaft, the mixing vanes arranged closest to the closure part sweeping over only a part of the area formed by the closure part, and the bottom plate of the closure part contains at least one flow disturbance which runs in the direction of flow and opposes the direction of rotation.
• the flow disrupters 17 arranged on the base plate of the closure part 5 extend radially as far as possible over the area of the base plate which is recessed by the mixing blades 16; ⁇ The flow disruptors 17 arranged on the base plate of the closure part 5 extend axially as far as possible up to the mixing blades 16; ⁇ The flow disruptors 17 arranged on the base plate of the closure part 5 extend so far in the direction of rotation that, together with the mixing blades 16, they prevent a direct product flow on the base plate between the two product inlet openings 6, 7 in every resting position of the mixing axis 8.
• the dynamic mixer has an at least partially largely cylindrical chamber part and a mixer shaft
• the widening is generally designed in such a way that the mixer axis deviates outwards from the cylindrical shape at the point in question.
• the expansion can e.g. be a curvature or emerge from the mixing axis in a wedge shape, so that the cross section of the widening has an angular or round cross-sectional shape.
• the side of the widening which protrudes from the chamber part can be chamfered or rounded.
• the widening can also be designed in such a way that the mixer axis deviates from the cylindrical shape at the point in question in such a way that a half-spherical and half-elliptical overall cross section is produced.
• All deviations from the cylindrical shape can also be arranged offset along the mixing axis, so that different mixing planes can have differently arranged or shaped deviations.
• Another way to avoid plug flow is to design the mixing shaft eccentric to the axis of rotation on the levels not occupied by mixing blades. This is e.g. reached when the shaft is shaped with an oval cross section. Similar to a camshaft, the shaft can also be designed in sections in the form of a circle or disk and have planes arranged eccentrically to one another. In the case of an eccentrically offset arrangement of the levels, however, these can also have a polygonal design.
• baffles described above are part of the rotor and are therefore to be understood as a deflection of the axial product flow.
• baffles have proven to be particularly advantageous in this area. This is implemented, for example, in that the high peripheral speed of the outer region, which is advantageous for mixing, is achieved by mixing blades that extend as far as possible to the housing wall and the closure part base. In the transition area between the closure part and the mixing shaft, the mixing blades are advantageously left out entirely and one or more baffles arranged on the bottom of the closure part.
• baffles of the closure part are arranged around the mixing shaft in a block, wedge or ramp shape, they can, in conjunction with the mixing blades facing the inlet openings, prevent a direct product flow of the components into the inlet opening of the other component after the mixing process has ended.
• dental materials of different consistencies are pressed out of storage containers and mixed to form an impression material.
• the dental materials are pressed from the storage containers into a mixer, the mixer having inlet openings which are matched to the outlet openings of the storage containers and which realize several, in particular at least three, preferably at least four of the following features:
• a component to be mixed is kneadable and is fed in particular to a mixer with a storage chamber;
• the storage chamber is not separated from the mixing chamber; m) the components to be mixed are fed to a mixer shaft, the cross-sectional area of which is less than 20% of the cross-sectional area of the chamber part; n) the mixing shaft, together with the mixing elements, occupies less than 60% of the cross-sectional area of the chamber part; o) the strand pressed into the buffer reservoir is divided with a strand divider in the buffer reservoir; p) the smaller inlet opening of the mixer is secured against contacting the larger opening of the storage container by at least one element; q) the mixer axis has at least partially an expansion of the mixer axis which narrows the flow cross section between the mixing wing planes; r) at least some of the mixing elements attached to the mixer shaft (8) partially generate a mass flow against the conveying direction; s) convey the mass to be mixed alternately in the radial direction from the outside in and back.
• a static chamber mixer is suitable for mixing the components of polyether impression materials.
• Polyether impression compounds are understood to mean, inter alia, both products based on silane-terminated polyethers and also based on aziridine-terminated polyethers.
• a method for mixing the com- Components of polyether impression materials provided, in which a static chamber mixer is used.
• a static chamber mixer for mixing polyether impression compounds is used, in particular the use of a static chamber mixer for mixing impression compounds based on silane-terminated polyethers or the use of a static chamber mixer for mixing impression compounds based on aziridine-terminated polyethers.
• polyether impression compositions can be mixed particularly well with static chamber mixers, as are known, for example, from EP 1 426 099 A1 and the content of which is expressly incorporated in the disclosure of the present invention.
• the widely used silicone impression compounds can be mixed equally well with static chamber mixers as well as with static spiral mixers.
• the polyether molding compositions which have recently been used increasingly can surprisingly be mixed much better with chamber mixers than with spiral mixers. It is surprising for the person skilled in the art in that he initially assumes a similar miscibility of the two materials.
• This method according to the invention can be carried out, for example, with a mixer according to EP 1 426 0999 A1.
• the impression materials used are known, for example, from EP 269 819 B1.
• a conventional double-chamber cartridge which has the two starting components to be mixed of a silane-terminated polyether impression material in a volume ratio of 2: 1 in its two chambers, is connected to the inlet opening of the chamber mixer. The components are pressed out of the cartridge by the chamber mixer and mixed in the process. It has been shown that the two components are mixed to form a homogeneous product.
• the so-called lamella formation that occurs when using spiral mixers (the product can be divided into layers in an early state of crosslinking) is completely or almost completely absent in the chamber mixers. With impression compounds based on aziridine-terminated polyether, the formation of lamellae can be avoided by using a chamber mixer.
• Fig. 1 shows a mixer with the buffer chamber 22
• Fig. 2 shows the rounded end 20 of the buffer chamber
• Fig. 3 shows - compared to Fig. 2 rotated by 90 ° - the chamfered edge 19 of the buffer chamber 22;
• Ventil openings 53, 54 which are shaped as round or square holes
• 17 and 18 show the mixer axis in cross section, with a circular and square configuration of the widening
• 19 and 20 show configurations and positioning of the oval mixer axis and the mixer blades
• FIG. 24 shows in cross section the configuration of the closure part with a flow disruptor.
• 25 shows the dynamic mixer in the front view, consisting of chamber part 1, mixer shaft 8 and closure part 5 with the two inlet openings 6, 7 and the orientation aid 40.
• 26 shows the dynamic mixer in the front view, placed on the two outlet ports 44, 46 of the tubular bag 47, 48, in which the two outlet ports 44, 46 of the tubular bag 47, 48 have different diameters, and the outlet port 44 sealingly on the outside 39 the inlet opening 6 is plugged on.
• 27 shows a side view of the dynamic mixer, placed on the outlet connector 44 of the tubular bag 47, in which the outlet connector 44 is plugged past the orientation aid 40 on the outside 39 sealingly onto the inlet opening 6.
• 28 shows the dynamic mixer in the front view, placed on the two outlet ports 45, 46 of the tubular bag 47, 48, in which the two outlet ports 44, 46 of the tubular bag 47, 48 have different diameters, and the outlet port 45 on the inside 38 sealingly the inlet opening 6 is inserted.
• 29 shows a closure part 5 with two web-shaped orientation aids 40 in the vicinity of the inlet opening 6 without touching it.
• One embodiment of the invention is a dynamic mixer, in particular for dental materials of various consistencies, with a chamber part, with a discharge opening at the front end of the chamber part, with a closure part arranged at the rear end of the chamber part, which has a base plate, with inlet openings for individual components to be introduced and one centric opening for a mixer shaft, which can be rotated in the chamber part about its longitudinal axis, the inlet opening 7 for the component (“multicomponent”) present in larger quantities widening outside the region of the chamber that can be reached by mixing elements to form a buffer reservoir 8. At least one is preferred one of the characteristics
• ⁇ that the individual components are present in mixing ratios different from 1; ⁇ that the total area of the inlet openings of one component is not equal to the total area of the inlet openings of another component; ⁇ that the buffer reservoir 22 extends around the inlet opening 7, in particular radially on both sides of the inlet opening 7; ⁇ that at least one end 9 of the buffer reservoir 22 adjoining the closure part 5 is at least partially not at right angles to the plane of rotation;
• a further embodiment consists of a dynamic mixer, in particular for dental materials of various consistencies, with a chamber part 1, with a discharge opening 2 at the front end of the chamber part 3, with a closure part 5 arranged at the rear end of the chamber part 4, with inlet openings 6, 7 for individual components to be introduced , which are present in different proportions and are to be mixed, and a central opening for a mixer shaft 8, which is rotatable in the chamber part 1 about its longitudinal axis, wherein it has a buffer chamber 22 arranged between the inlet opening 7 and the mixing chamber 21, which is not is used as a flow channel for one of the components.
• At least one of the features is preferably present, ⁇ that the buffer chamber 22 has at least one ventilation opening 50, 51, 52, 53, 54 arranged towards the mixing chamber 21, the cross-sectional area of which is significantly smaller than that of the inlet opening 7;
• the ventilation opening 51, 52 is provided in the form of a slot radially on the outside and / or inside of the buffer chamber 22;
• a further embodiment consists of a dynamic mixer, in particular for dental materials of various consistencies, with a chamber part 1, with a discharge opening 2 at the front end of the chamber part 3, with a closure part 5 arranged at the rear end of the chamber part 4, with inlet openings 6, 7 for individual components to be introduced which are present in proportions which differ from lab and are to be mixed, and a central opening for a mixer shaft 8 which can be rotated about its longitudinal axis in the chamber part 1,
• At least one of the features is preferably present,
• a further embodiment consists of a dynamic mixer, in particular for dental materials of various consistencies, with a chamber part 1, with a discharge opening 2 at the front end of the chamber part 3, with a closure part 5 arranged at the rear end of the chamber part 4 with inlet openings 6, 7 for individual components to be introduced, the are present in proportions other than 1 and are to be mixed, and a central opening for a mixer shaft 8, which can be rotated about its longitudinal axis in the chamber part 1,
• the cross-sectional area of the mixer shaft 8 is less than 20% of the cross-sectional area of the chamber part 1
• the cross-sectional area of the mixing shaft 8 including the mixing elements 23, 28, 27, 30 is less than 60% of the cross-sectional area of the chamber part 1.
• the mixing elements can be designed differently.
• Mixing elements 23 which have a baffle surface 24 parallel to the mixer axis in the direction of rotation and which are at least partially narrower towards the rear 25, 27 have proven effective.
• At least some of the mixing elements 23 attached to the mixing shaft 22 partially generate a mass flow against the conveying direction, in that at least one of the surfaces 26 running in the radial plane is beveled against the product flow.
• the position and shape of the mixing elements 28, 29, 30 attached to the mixer shaft 22 can be used to convey the mass to be mixed alternately in the radial direction from the outside in and back.
• mixing elements 28 attached to the mixer shaft 22 are chamfered and arranged axially to one another in such a way that they form a conical flow channel 31, 32; or that
• ⁇ at least some of the mixing elements 28 are arranged radially one behind the other in such a way that the taper 31, 32 is directed alternately outwards and inwards;
• connections 33, 34, 35, 36 of the mixing elements 29, 30 are advantageously mounted alternately inside and outside on the radial level.
• the connection 33, 34 of the mixing elements 30 can describe an arc 37 toward the product flow side.
• 16 shows the dynamic mixer with an at least partially largely cylindrical chamber part 1, with a discharge opening 2 at the front end of the chamber part 3, with a closure part 5 arranged at the rear end of the chamber part 4 with inlet openings 6 and 7 for individual components to be introduced and one Central opening for a mixer shaft 8 rotatable in the chamber part 1 about its longitudinal axis, with at least two planes 9 arranged axially one behind the other, each with at least two mixing vanes 10 arranged radially one behind the other, with the special feature that at least a part of the mixing axis 8 located between the mixing plane 9 levels one Flow cross section 54 has narrowing widening 14, 15 of the mixing axis 8.
• 17 shows the polygonal (here: square) design of the widening 14 and the mixing blades 10.
• FIG. 18 shows a circular configuration of the widening 15 corresponding to FIG. 17.
• FIG. 21 shows the variant corresponding to the representation in FIG. 19, in which the axis has eccentrically arranged disks with a spherical cross section in the planes EH.
• FIG. 21 shows how the mixing vanes 16 arranged closest to the closure part 5 sweep over only part of the area formed by the closure part 5, and how the bottom plate of the closure part 5 contains at least one flow disturbance 17 that runs in the direction of flow and opposes the direction of rotation.
• the flow disruptors 17 arranged on the base plate of the closure part 5 extend radially as far as possible over the area of the base plate which is left open by the mixing blades 17; and / or as far as possible axially up to the mixing blades 17.
• the flow disruptors 17 arranged on the base plate of the closure part 5 extend so far in the direction of rotation that, in every resting position of the mixing axis 8, together with the mixing blades 16, there is a direct product flow on the base plate between the two product inlet openings 6 and 7 prevent.
• the surfaces of the flow disturbers 17 facing the direction of rotation preferably have an inclination of 10 ° to 80 ° relative to the base plate.
• the surface (s) of the flow disruptors 17 facing away from the direction of rotation advantageously have an inclination of 80 ° to 90 ° relative to the base plate
• the individual planes E-H are shown in cross section in FIG. 22, the offset arrangement of the disks of the axis 58 being clear.
• FIG. 23 (and in FIG. 24) one can see an embodiment in which two flow interrupters 17 running in the flow direction and opposing the direction of rotation are arranged on the base plate of the closure part.
• the flow disruptors can extend as far as possible radially over the area of the base plate which is recessed by the mixing blades 16 or largely axially as far as the mixing blades 16.
• the flow disruptors 17 arranged on the base plate of the closure part 5 extend so far in the direction of rotation that they prevent a direct product flow on the base plate between the two product inlet openings 6, 7 together with the mixing blades 16 in every resting position of the mixing axis 8 .
• the surface of the flow disturbers 17 facing the direction of rotation generally has an inclination of 10 ° to 80 ° relative to the base plate in the direction of rotation.
• the surface of the flow disruptors 17 facing away from the direction of rotation advantageously has an inclination of 80 ° to 90 ° relative to the base plate in the direction of rotation.
• Mixing element 29 Mixing element 30
• Mixing element 31 conical flow channel 32 conical flow channel 33 axial connection of second mixing elements 34 axial connection of second mixing elements 35 axial connection of second mixing elements 36 axial connection of second mixing elements 37 bend 38 inlet connector, inside 39 inlet connector, outside 40 orientation aid 41 orientation aid 42 orientation aid 43 orientation aid 44 further outlet connection of the small component narrow outlet connection of the small component outlet connection of the large component storage container of the small component storage container of the large component oblique, radial boundary of the buffer chamber ventilation slot of the buffer chamber ventilation slot of the buffer chamber ventilation opening of the buffer chamber ventilation opening of the buffer chamber ventilation opening of the buffer chamber narrowed flow cross-section flow cross-section eccentric axis of the M axis

Landscapes

• Health & Medical Sciences (AREA)
• Veterinary Medicine (AREA)
• Animal Behavior & Ethology (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Epidemiology (AREA)
• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Mixers Of The Rotary Stirring Type (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Priority Applications (3)

Applications Claiming Priority (6)

Publications (1)

Family

ID=34915871

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (3)

Family Cites Families (14)

• 2005
  • 2005-02-23 JP JP2007500138A patent/JP2007527283A/ja not_active Withdrawn
  • 2005-02-23 EP EP05715470A patent/EP1720664A1/fr not_active Withdrawn
  • 2005-02-23 US US10/590,760 patent/US20080264809A1/en not_active Abandoned
  • 2005-02-23 WO PCT/EP2005/001876 patent/WO2005082549A2/fr active Application Filing

Also Published As

Similar Documents

Legal Events