EP3658266B1 - Melangeur avec canal de compensation et/ou chambre d'accumulation - Google Patents

Melangeur avec canal de compensation et/ou chambre d'accumulation Download PDF

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Publication number
EP3658266B1
EP3658266B1 EP18746917.6A EP18746917A EP3658266B1 EP 3658266 B1 EP3658266 B1 EP 3658266B1 EP 18746917 A EP18746917 A EP 18746917A EP 3658266 B1 EP3658266 B1 EP 3658266B1
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EP
European Patent Office
Prior art keywords
flow
mixer
mixing
components
mixer according
Prior art date
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EP18746917.6A
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German (de)
English (en)
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EP3658266A1 (fr
Inventor
Alexander Bublewitz
Jens-Peter Reber
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3lmed GmbH
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3lmed GmbH
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Priority claimed from DE102017117198.3A external-priority patent/DE102017117198A1/de
Priority claimed from DE102017117199.1A external-priority patent/DE102017117199A1/de
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Publication of EP3658266A1 publication Critical patent/EP3658266A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/716—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components
    • B01F35/7164—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components the containers being placed in parallel before contacting the contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B01F25/4231—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
    • B01F25/43141—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles composed of consecutive sections of helical formed elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4321—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa the subflows consisting of at least two flat layers which are recombined, e.g. using means having restriction or expansion zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/55—Baffles; Flow breakers
    • 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
    • B01F2101/19—Mixing dentistry compositions
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43162—Assembled flat elements

Definitions

  • the present invention relates to a mixer with a mixer housing that encloses a mixing space, an input part that can be connected to the mixer housing and that has at least two input openings for the components to be mixed, and a mixing element that extends at least in sections into the mixing space, with each of the input openings is in flow communication with the mixing chamber via at least one inlet channel.
  • Generic static and dynamic mixers are used, for example, in the dental field or for construction materials and adhesives.
  • the mixing element of the mixer is used for the homogeneous mixing of several, usually two, viscous or pasty components, which are stored separately in a cartridge or a similar container so that they can be discharged.
  • Typical consistencies/viscosities for dental impression materials are described in the DIN EN ISO 4823 standard.
  • the mixing process often starts a reaction between the individual components, with the actual substance to be processed, for example a dental material or a building material or adhesive, being formed.
  • Typical mixing ratios include 1:10, 1:5, 1:4, 1:2 and 1:1.
  • compositions and concentrations of the viscous/pasty components (hereinafter also referred to as simply: components) and their mixing ratio are coordinated with one another, it is crucial that the ratio of the components to one another is maintained not only during the filling process into the cartridge, but also during the mixing process itself .
  • the filling of the components into the cartridges is associated with certain filling level fluctuations, typically in the range of 5%, with greater technical effort also 1%, of the filled volume.
  • the arrangement of the respective dispensing pistons is associated with certain tolerances. As a result, one of the pistons is located further forward in the discharge direction. Both the technical fluctuations in the filling height and the slightly different arrangement of the dispensing pistons mean that one of the components enters the mixing chamber before the other component.
  • the breakaway torque of the dispensing piston i.e.
  • the initial impulse of the dispensing piston when releasing from the storage position in the dispensing direction can vary, in particular due to manufacturing fluctuations, so that even for perfect filling, one of the components will enter the mixing chamber before the other component.
  • the components to be mixed generally have a different composition, the components also differ in their rheology and thus in their application behavior. Since the different composition inherently underlies a multi-component system, it is therefore not possible, even by optimizing the known constructions and the filling process, to rule out that even with 1:1 cartridges, one of the components enters the mixing chamber before the other component.
  • one component forms a so-called pre-flow, which enters the mixing space before the other component, so that at least the initial ratio of the components to one another deviates from the ideal mixing ratio.
  • Such a forerun often leads to it being discharged from the mixer unmixed.
  • the unmixed leading component must be discarded since it does not have the properties of the processing stock.
  • EP 2 599 540 B1 describes a mixing element for a static mixer that reduces the overflow of a component by introducing that component through an inlet port separate from the other component to the mixing element. By guiding the components separately, a previously known lead can be compensated.
  • EP 2 527 029 A2 discloses a mixer having a star-like baffle plate having a central pin or spike extending upstream into the flow of material and diverging in the direction of flow into an axis-perpendicular plate.
  • the WO 2012 116 873 A1 also relates to the compensation of a lead.
  • two deceleration chambers and a deflection element are provided, with the deflection element deflecting the component flows radially inwards.
  • US 2012/0 199 607 A1 discloses a dispensing device with a two-component cartridge and a mixer that can be attached to it.
  • the mixer should be able to be easily brought to and removed from the cartridge.
  • a mixer is known with a foreshots-collecting combining chamber provided within a mixer inlet area.
  • the component inlet openings are divided by a separating rib and the path of the excess component is extended.
  • the WO 2012/116863 A1 and the DE 20 2012 013429 U1 each describe a mixer with a mixer housing that encloses a mixing chamber, an inlet part that can be connected to the mixer housing and has at least two inlet openings for the components to be mixed, and a mixing element that extends at least in sections into the mixing chamber extends, wherein each of the inlet openings is in flow communication with the mixing chamber via an inlet channel.
  • a flowable reservoir chamber is also provided, which receives a flow.
  • the WO 2012/116863 A1 discloses a channel which accommodates the mixing components, however, the components are already mixed in this with the aid of arms, and thus any forerun is not only accommodated but also used during mixing. This can falsify the mixing ratio.
  • a bottling-related fluctuation of a component that is present in excess has a greater effect than with a component that is present in deficit. Therefore, there is only a lead of the component present in excess, while a bottling-related fluctuation in the component present in deficit does not form a lead.
  • the component present in excess also occurs in advance because the container holding this component and the associated dispensing piston are significantly larger than the respective components of the component present in deficit.
  • the known solutions it is essential to know before filling the components which component is in excess and will therefore form forerun. Therefore, the known solutions can only be used with unequal mixing ratios.
  • the mixer has a mixer housing with a mixing chamber, an inlet part that can be connected to the mixer housing and has at least two inlet openings for the components to be mixed, and a mixing element, the mixing element extending at least in sections into the mixing chamber.
  • Each of the entrance openings is standing in flow communication with the mixing chamber via at least one inlet channel.
  • at least one compensation channel is formed in the inlet part, which connects the inlet openings to one another.
  • at least one storage chamber for receiving the flow is provided in the mixing element.
  • the inlet openings By connecting the inlet openings to a compensation channel, flow emerging from the inlet openings can enter the compensation channel and be collected there as flow. Because the inlet ports are interconnected, forerun is collected independently of the component making up the forerun. In other words, the connection between the inlet openings ensures that the components reach the compensation channel through these inlet openings without having to make a preselection with regard to the components forming the flow.
  • the compensation channel allows for self-regulation with regard to the flow, since the compensation channel is first filled by the preceding component until the further component flows into the compensation channel and further filling of the compensation channel by the preceding component is prevented. Both can then enter the mixing chamber separately or together via the inlet channels.
  • the invention can be seen in the fact that a radially open compensation channel is provided.
  • the compensation channel is formed by an outer closed ring and by an inner ring with symmetrically arranged openings.
  • the leading component spreads out in the compensation channel until it is countered by the trailing component.
  • a variable component front is created.
  • the Components form a contact surface on this front.
  • the component front remains in its position in the compensation channel, which means that the component mass that continues to flow in flows the shortest way out of the inlet openings through the corresponding openings in the inlet to the mixing chamber and then axially in the discharge direction.
  • the arrangement of at least one storage chamber in the mixing element also allows the intake of the feed regardless of which of the components forms the feed, since the storage chamber or the storage space is provided in the mixing element and is therefore filled by the preceding component.
  • the storage chamber according to the invention is designed in such a way that the flow is received and remains in the storage chamber.
  • the storage chamber is preferably arranged in the first third of the mixing space in the direction of flow of the components.
  • the storage chamber is designed in such a way that it has closed side walls and only one opening, which is formed as an inlet opening in a transverse wall. Since the storage chamber has only one inlet opening but is otherwise not flow-connected to the other chambers, the flow entering the storage chamber is held there so that it essentially no longer participates in the further mixing process.
  • the mixer according to the invention can be a static or a dynamic mixer.
  • the compensation channel is provided in the input part. Therefore, the compensation channel can be implemented with any type of mixer and works independently of the concrete design of the mixer.
  • the internal volume of the compensation channel and/or the storage chamber is adapted to the filling-related fluctuations in such a way that the fluctuations in the volume of the components are smaller than the internal volume of the compensation channel and/or the storage chamber.
  • the internal volume of the compensation channel and/or the storage chamber corresponds to 1% to 10%, in particular 1% to 8%, particularly preferably 1% to 5%, of the volume of a component when the mixing ratio is 1:1. If the mixing ratio deviates from 1:1, the volume of the component present in larger proportions is decisive.
  • the internal volume of the compensation channel and/or the storage chamber corresponds to 1% to 10%, in particular 1% to 8%, particularly preferably 1% to 5%, of the volume of the component present in excess relative to the volume of the component present in deficit Component or the volume of the component present in excess based on the volume of the component present in excess.
  • two compensation channels are formed in the input part, each of which connects the input openings to one another. This prevents any blockage of the flow connection from the inlet opening to the mixing space.
  • the inlet channels are designed in such a way that the components to be mixed are fed into the mixing chamber separately from one another. This prevents the components from reacting prematurely and preventing the intake ports from becoming clogged. In addition, the separate feeding of the components into the mixing space allows better mixing of the components with one another.
  • the two inlet openings are arranged diametrically opposite one another in the inlet part, the inlet channels extending along a diagonal connecting the inlet openings and being separated from one another by a partition running transversely to the diagonal.
  • the partition wall prevents any mixing of the components at the inlet openings, which could cause them to become clogged.
  • the partitions are formed along part of the periphery of an entry port.
  • the partition walls are in particular along less than 50%, preferably less than 40%, very particularly preferably between 20% and 30% of the entire circumference of the corresponding Input opening are arranged.
  • the partitions along less than 80%, preferably less than 70%, very particularly preferably between 40% and 60% of the circumference of the corresponding inlet opening available for inflow are arranged.
  • the inlet ducts are designed in such a way that the components to be mixed are guided into the mixing chamber, at least partially enveloping one another. This supports the subsequent mixing process in the mixing room.
  • the inlet channels can be in flow connection with one another, so that the components to be mixed are guided together into the mixing space.
  • the at least one compensation channel extends essentially in the shape of a circular arc between the inlet openings. Such an arrangement ensures that the components can flow into the compensation channel from each of the inlet openings.
  • the at least one compensation channel runs radially outside of the inlet channels.
  • the flow is routed outwards from the inlet openings or inlet channels into the compensation channel, which is particularly preferred when the inlet into the mixing chamber is arranged centrally, viewed radially.
  • the flow initially fills the external compensation channel and the components can then enter the mixing chamber together. This prevents the inlet channels from being interrupted by the compensation channel and also ensures a relatively short path from the inlet openings into the mixing chamber, since this path leads centrally along the inlet channels into the mixing chamber. This also reduces the discharge pressure, since the components have to be discharged over a short distance with less effort.
  • the at least one compensation channel and the inlet channels are designed as depressions or grooves in the inlet part, which are closed at least in regions by the mixer housing or the mixing element. Since the inlet part is manufactured separately from the mixer housing, further material can be saved during manufacture in this variant. It is particularly preferred if the mixer housing or the mixing element covers the compensation channel by a disk-shaped or funnel-shaped collar in the inlet area of the mixing space.
  • the compensation channel has a mirror plane running through the centers of the input openings.
  • the compensation channel can have a multiple rotating mirror axis.
  • the number of rotation axes corresponds to the number of inlet openings. So if there are two input ports, a two-fold rotating mirror axis is preferred, if there are three input openings, a three-fold rotating mirror axis is preferred, etc. This symmetry ensures that with mixing ratios of 1:2 to 1:1 or 1:1:2 to 1: 1:1 compensation of the lead is ensured for more than two components, regardless of the respective leading component.
  • the inlet part and the mixer housing are designed and adapted to one another in such a way that the components to be mixed, which emerge from the inlet openings and are to be mixed, flow through 90° from a flow direction extending parallel to the longitudinal axis of the mixer housing into a flow direction transverse to the longitudinal axis of the Mixer housing are deflected. The deflection prevents the components from penetrating directly into the mixing chamber past the compensation channel.
  • a flow wall is provided along the circumference of at least one inlet opening and is concave or convex in shape when viewed from the corresponding inlet opening.
  • the flow wall in particular is arranged along less than 50%, preferably less than 40%, most preferably between 20% and 30% of the total perimeter of the corresponding entrance opening.
  • the flow wall along less than 80%, preferably less than 70%, most preferably between 40% and 60% of the circumference of the corresponding inlet opening available for inflow.
  • the at least one flow wall closes off in a sealing manner with a disk-shaped or funnel-shaped collar of the mixer housing or of the mixing element.
  • the axial length of the flow wall corresponds to the axial length of the compensation channel.
  • flow walls it is preferable to arrange them at a distance from one another, so that the components can flow centrally through the gaps formed between the flow walls in the direction of the mixing element.
  • the extent of the distance between two adjacent flow walls defines the pressure drop in the center toward the mixing element.
  • the distance is preferably selected in such a way that the pressure drop between the walls is greater than the pressure drop in the compensation channel, so that the material flowing ahead flows into the compensation channel before it enters the mixing chamber centrally.
  • the inlet part has a storage space that runs radially outside the compensation channel and/or the inlet channels.
  • the Storage space is closed off in the material discharge direction of the components, so that the components cannot flow from the storage space into the mixing element. This separates the storage space from the intake ports.
  • a storage space is particularly advantageous if a large-volume flow is to be expected. Storage space is therefore advantageous, in particular for mixing ratios that deviate from 1:1, in particular 1:10.
  • the inlet openings is assigned an optional deflection plate and/or a flow clamp, which at least partially covers and/or laterally delimits the corresponding inlet opening.
  • the deflection plate is preferably provided above the corresponding inlet opening and is therefore located directly in the material discharge direction, so that the component flowing through the corresponding inlet opening hits the deflection plate when exiting the inlet opening and is deflected, in particular in the direction of the mixing chamber.
  • the flow clip preferably delimits the corresponding inlet opening laterally in such a way that the component which flows through the corresponding inlet opening is directed in the direction of the mixing space when it exits the inlet opening.
  • Both the deflection plate and the flow clamp therefore allow a flow direction to be specified for the component flowing out of the corresponding inlet opening. This is particularly advantageous when the proportion of the corresponding component is low, so that this component can flow almost completely into the mixing space and any residues in the input part are minimized.
  • the advantages of the deflection plate described above can also be achieved by a collar provided on the mixing element if this, comparable to the deflection plate, covers at least one of the inlet openings when the inlet part and the mixing element are mounted in the mixer.
  • the mixing element has a flow chamber adjacent to the storage chamber, which is in flow communication with the mixing space via a through-opening.
  • the flow chamber is delimited by a transverse wall in the material discharge direction and that the transverse wall comprises a transverse wall opening, so that the components can at least partially flow through the transverse wall opening. This reduces the discharge pressure when discharging the components through the mixer, resulting in greater ease of use when discharging.
  • the cross section of the mixing element perpendicular to the material discharge direction in the section of the storage chamber and/or flow chamber is 105% to 150%, preferably 105% to 120%, particularly preferably 110% ⁇ 5% of the cross section perpendicular to the material discharge direction
  • Mixing element viewed in material discharge direction is subsequent section of the mixing element.
  • the mixing element is enlarged in an area of the storage chamber and/or flow chamber.
  • a higher flow cross section can be achieved in this area with the stability of the mixing element remaining the same, which is advantageous for reducing the discharge pressures, particularly in the case of highly viscous components.
  • the capacity of the storage chamber is improved, so that a large-volume flow can be accommodated.
  • the storage chamber and/or flow chamber are preferably provided in the section that overlaps with the inlet section of the mixing sleeve, which has the advantage that a widening of the mixing element can be accommodated in this section by appropriately adapting the inner contour of the inlet section of the mixing sleeve. Otherwise can Of course, the mixing sleeve itself can be adjusted accordingly to the widened contour of the mixing element.
  • the Figures 1a to 1d show a first embodiment of the input part 1 with input openings 2 for the components to be mixed.
  • the first input part 1 has a guide projection 3 whose function in the WO 2013/026716 is explained and to which reference is made in this respect.
  • At least one compensation channel 4 is formed between the inlet openings 2 ( Figures 1c and 1d ), which connects the inlet openings 2 with each other. Flow entering through the inlet openings 2 is taken up by the compensation channel 4 .
  • the inlet openings 2 are diametrically opposed to one another.
  • a flow wall 5 which is formed along a part of the circumference of each inlet opening 2, respectively. Viewed from the respective inlet opening 2 on which the corresponding flow wall 5 is formed, the flow wall 5 is formed along the circumference and is therefore concave. In which case shown here, the components cannot flow into the compensation channel 4 over the entire circumference of the inlet openings 2, as can be seen from FIG 1c clearly results.
  • the functioning of the compensation channel 4 is based on the Figures 2a to 2c explained.
  • component B forms a lead. This exits through an opening and flows along the flow direction 6B past a flow wall 5 into the compensation channel 4. The flow of component B flows along the compensation channel 4 until component A along the flow direction 6A also enters the compensation channel 4 and the flow component B stops. Then both components A and B flow centrally through a further inlet opening into the mixing space (not shown).
  • component A forms the flow, which flows along flow direction 6A into compensation channel 4 until component B also flows into compensation channel 4 .
  • FIGs 3a and 3b show in perspective view ( Figure 3a ) and in top view ( Figure 3b ) A modification of the first input part as a second embodiment, wherein between the input openings 2 at least one in the compensation channel 4 protruding indentation 8 is provided.
  • two opposing indentations 8 are provided, which direct the flow directions 6A and 6B of components A and B more towards the central opening 7 of the mixing space (not shown).
  • FIG. 4a to 4e a third embodiment of the input part 1 is shown.
  • two further flow walls called deflection walls 9 here, are provided which, together with the flow walls 5, which are arranged at the inlet openings 2, form a circular structure 10.
  • the flow walls 5 are designed convex from the respective inlet opening 2 in such a way that the center point of the circular structure 10 coincides with the center point of the inlet part 1 .
  • the Figure 4c shows the flow direction 6A and 6B in the case that none of the components forms a forerun, while in in the Figure 4d illustrated case, the component B forms a lead and in the Figure 4e component A forms a lead.
  • the flow walls 5 and the deflection walls 9 are arranged at a distance from one another, so that openings are formed between each deflection wall 9 and the adjacent flow walls 5, or between each flow wall 5 and the adjacent deflection walls 9.
  • Components A and B can flow through the openings into the centrally arranged entrance to the mixing chamber (not shown). Due to the arrangement of the flow walls 5 and the deflection walls 9, the components A and B first fill the compensation channel 4 and then flow through at least one inlet channel 7a centrally into the mixing chamber.
  • a fourth embodiment of the input part 1 is shown, which is based on the first embodiment of the input part 1, but was supplemented by a partition 11.
  • the partition wall 11 lies between the inlet openings 2 and below the central inlet area to the mixing chamber (not shown). Furthermore, two inlet channels of the components into the mixing chamber are separated from one another by the partition wall 11 .
  • the in the Figures 6a to 6c The fifth embodiment of an entry part 1 shown has an enveloping element 12 arranged centrally in the entry part 1 .
  • a circumferential compensation channel 4 is provided radially around the enveloping element 12 and receives the flow of the components A and/or B.
  • the enveloping element 12 is essentially circular and has a central opening 12a, which opens in the direction of an inlet opening of a component and guides it centrally in the direction of the mixing space.
  • a further opening is arranged opposite the central opening 12a in the direction of the other component, which guides it in a substantially semi-circular channel 12b around the central opening 12a.
  • FIGS. 7a to 7e show a sixth embodiment of the input part 1 with a further variant of an enclosing element 12 with flow walls 5.
  • the flow walls 5 prevent components A and B from flowing directly into the enclosing element 12. This reduces the flow resistance increased to flow into the enveloping element 12, so that this embodiment is preferred for thin-viscous components.
  • a mixing element 13 with storage chambers 14 is shown, which are arranged in the entrance area of the mixing chamber and can absorb the flow that occurs.
  • the storage chambers 14 are closed at their end in the direction of flow of the components, so that the flow does not enter the further mixing chamber and does not falsify the mixing ratio.
  • the mixing element 13 has a disk-shaped or funnel-shaped collar 15 on the inlet side, which is designed in such a way that it covers the inlet part 1 and partially or completely closes the compensation channel 4 .
  • Figure 9a shows a helical mixer 16 with known mixer connection 17 and known input part 18 according to the prior art.
  • Figure 9b shows the first web 19 of the helical mixer and the inlet openings 2 through which the components flow into the inlet part 18 .
  • FIG 11 shows an exploded view of a mixer according to the invention with a mixing element according to FIG Figures 8a to 8c , a mixer housing 13a and an input part 1.
  • Figures 12a and 12b show another mixing element 13 with an input part 1.
  • the disk-shaped or funnel-shaped collar 15 covers the compensation channel 4 in the inlet part 1 in the discharge direction of the components, so that the components from the inlet part 1 enter the mixing element 13 centrally through a central inlet opening 13b (see Fig. Fig. 13 a) stream.
  • figure 14 shows several top views of the second input part 1 according to FIG Figures 3a and 3b , the mixer and the components A and B at different times t1, t2 and t3 which increase in this order.
  • the advance of component A is compensated for by the compensation channel 4 according to the invention, so that both components A and B enter the mixing chamber almost simultaneously (bottom right).
  • FIG 15 a plan view of the third input part is shown above with (top right) and without (top left) inlet channel 7a into the mixing chamber (mixer inlet).
  • the flow of component A is shown on the left (time t1) and on the right the position of components A and B shortly before they flow into the central inlet channel 7a (time t2) in the mixing chamber.
  • the flow of component A is stopped by the inflow of component B, so that the present invention allows self-regulation with regard to the volume of the flow and also a Compensation achieved regardless of whether component A forms the lead (as shown) or component B (not shown).
  • time t3 When entering the mixer (below in figure 15 ) (time t3) the components A and B are present in the intended mixing ratio of 1:1.
  • FIGS 16a and 16b illustrate the storage chambers 14 in the mixing element 13. As shown in particular in the detailed view ( Figure 16b ) to see, the storage chambers 14 lie on a line lying through the center point of the mixing element 13, or diametrically opposite.
  • the input parts 1 according to a seventh embodiment ( Figures 17a to 17c ) and an eighth embodiment ( Figures 18a to 18c ) are optimized for a mixing ratio of the components that deviates from 1:1.
  • the mixing ratio is preferably 1:10.
  • FIGS 17a to 17c show a seventh input part 1, in which case the component present in excess can flow into the input part 1 through the input opening 2a, while the component present in excess can flow into the input part 1 through the input opening 2b.
  • the seventh input part 1 comprises a deflection plate 20 located in the material discharge direction, which at least partially covers the input opening 2a in its radially outer area in such a way that the component flowing in through the input opening 2a is deflected in the direction of the central opening to the mixing chamber 7 (not shown). ( Figure 17c ).
  • the deflection plate 20 prevents a loss of the component present in the deficiency in the area of the input part 1.
  • the advantages associated with the deflection plate 20 can also be achieved by the collar 15 of the mixing element 13.
  • FIG. 18a to 18c an eighth embodiment of the input part 1 is shown.
  • the flow wall 5 is connected here continuously and centrally to a web 19 which lies along a connecting axis between the inlet openings 2a and 2b.
  • the inlet opening 2a is bordered by a flow direction indicator 22, so that the inlet channel 7a points in the direction of the central opening to the mixing chamber 7 (not shown).
  • the compensation channel 4 is provided radially on the outside and can accommodate the flow.
  • This embodiment has a high inner prelumen of the compensation channel 4, so that this embodiment is particularly suitable for large-volume pre-runs.
  • FIGS. 19a to 24c show further embodiments of a mixing element 13 with a storage chamber 14.
  • the components to be mixed can flow in through the inlet opening 13b provided centrally in the collar 15 from the inlet part 1 (not shown).
  • Figures 19a to 19c show a mixing element 13 according to a third embodiment. From the longitudinal view of Figure 19b the arrangement of the storage chamber 14 in the first part of the mixing element 13, viewed in the material discharge direction, can be seen. In addition, the section plane AA is shown, while the corresponding longitudinal section in the Figure 19c is shown.
  • the components When the components flow in through the inlet opening 13b, they are divided at a central wall 23 and flow partly into a storage chamber 14 and partly into a flow chamber 24. From the flow chamber 24, the components flow through a passage opening 25 to the chambers of the mixing element 13, the length of which is in Material discharge direction is defined by the transverse walls 26.
  • the cross section of the passage opening 25 is smaller than the cross section of the flow chamber 24.
  • the smaller cross section is decisive for the pressure drop when the components are discharged, in this case the cross section of the passage opening 25. This can result in relatively high discharge pressures ,
  • the discharge pressure also being influenced by the specific design of the mixing element 13 and the specific viscosity of the components.
  • a fourth mixing element 13 is shown in a perspective view, a side view and as a longitudinal section along the section plane BB. Compared to that in the Figures 20a to 20c In the example shown, the mixing element 13 was shortened at its end lying in the material discharge direction. This reduces the discharge pressure, making this embodiment suitable for higher viscosity components.
  • the Figures 21a to 21c show a mixing element 13 in a fifth embodiment.
  • the draft angles on open sides of the mixing element were increased here.
  • the draft angles have in particular an angular range of 0.1° to 2°, preferably 0.1° to 1° and particularly preferably 0.5° ⁇ 0.1°.
  • a seventh mixing element 13 is in the Figures 23a to 23c shown.
  • the storage chamber 14 is reduced here in such a way that the passage opening 25 has been enlarged.
  • the flow cross section of the flow chamber 24 and the passage opening 25 is the same size. This in turn results in the discharge pressure being reduced compared to other embodiments.
  • this embodiment is particularly suitable in combination with an inlet part 1 which has a relatively large compensation channel 4 or a storage space 21 .
  • FIGS. 24a to 24c show an eighth mixing element.
  • a transverse wall opening 27 was added in a transverse wall closing off the flow chamber 24 in the material discharge direction. This allows some of the components to flow through the transverse wall opening 27 directly into the adjoining mixing space without having to pass through the through-opening 25 . This reduces the discharge pressure of the components, as part of these does not have to change its direction of flow in order to flow through the passage opening 25 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Accessories For Mixers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (17)

  1. Mélangeur, doté d'un corps de mélangeur (13a), qui renferme un espace de mélange, d'une pièce d'entrée (1), susceptible d'être reliée avec le corps de mélangeur (13a), qui comporte au moins deux orifices d'entrée (2, 2a, 2b) pour les composants (A, B) qui doivent être mélangés, et d'un élément mélangeur (13), qui au moins par segments s'étend dans l'espace de mélange, chacun des orifices d'entrée (2, 2a, 2b) étant en liaison fluidique par l'intermédiaire d'au moins un canal d'admission (7a) avec l'espace de mélange, caractérisé en ce que dans la pièce d'entrée (1) est conçu additionnellement au moins un canal de compensation (4) ouvert en direction radiale, qui relie l'un à l'autre les orifices d'entrée (2, 2a, 2b) et qui est formé d'une bague extérieure fermée et d'une bague intérieure pourvue d'ajours placés en symétrie, le canal de compensation (4) comportant un plan de symétrie, s'écoulant à travers les points médians des orifices d'entrée (2, 2a, 2b) et le long de la périphérie des orifices d'entrée (2, 2a, 2b) étant prévue une paroi d'écoulement (5), laquelle est façonnée de forme concave ou convexe, et/ou en ce que dans l'élément mélangeur (13) est prévue au moins une chambre d'accumulation (14) qui ne comporte qu'un seul orifice d'entrée, mais qui par ailleurs n'est pas en liaison fluidique avec les autres chambres de l'élément mélangeur (13).
  2. Mélangeur selon la revendication 1, caractérisé en ce que dans la pièce d'entrée (1) sont formés deux canaux de compensation (4), qui relient chaque fois l'un à l'autre les orifices d'entrée (2, 2a, 2b).
  3. Mélangeur selon la revendication 1 ou 2, caractérisé en ce que les canaux d'admission sont conçus de telle sorte que les composants qui doivent être mélangés soient conduits séparément l'un de l'autre dans l'espace de mélange.
  4. Mélangeur selon la revendication 3, caractérisé en ce que deux orifices d'entrée (2, 2a, 2b) sont placés de manière diamétralement opposée dans la pièce d'entrée (1), les canaux d'admission (7a) s'étendant le long d'une diagonale qui relie les orifices d'entrée (2, 2a, 2b) et étant séparés l'un de l'autre par une paroi de séparation (11) s'écoulant à la transversale de la diagonale.
  5. Mélangeur selon la revendication 3, caractérisé en ce que les canaux d'admission (7a) sont formés de telle sorte que les composants qui doivent être mélangés soient conduits dans l'espace de mélange en s'enveloppant mutuellement au moins par endroits.
  6. Mélangeur selon la revendication 1 ou 2, caractérisé en ce que les canaux d'admission (7a) sont en liaison fluidique mutuelle, de telle sorte que les composants qui doivent être mélangés soient conduits conjointement dans l'espace de mélange.
  7. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un canal de compensation (4) s'étend sensiblement en forme d'arc de cercle entre les orifices d'entrée (2, 2a, 2b) .
  8. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un canal de compensation (4) s'écoule en direction radiale à l'extérieur des canaux d'admission (7a).
  9. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un canal de compensation (4) et les canaux d'admission (7a) sont formés dans la pièce d'entrée (1) en creux ou en rainures, qui sont fermé(e)s au moins par endroits par le corps de mélangeur (13a).
  10. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce d'entrée et le corps de mélangeur (13a) sont conçus et adaptés l'un à l'autre de telle sorte que les composants qui doivent être mélangés soient renvoyés hors des orifices d'entrée (2, 2a, 2b) à partir d'une direction d'écoulement s'étendant à la parallèle de l'axe longitudinal du corps de mélangeur de 90° dans une direction d'écoulement à la transversale de l'axe longitudinal du corps de mélangeur (13a).
  11. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une paroi d'écoulement (5) se termine de manière à assurer l'étanchéité sur une collerette (15) en forme de disque ou d'entonnoir du corps de mélangeur (13a) ou de l'élément mélangeur (13).
  12. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce d'entrée (1) comporte un espace d'accumulation (21) qui s'écoule en direction radiale à l'extérieur par rapport au canal de compensation (4) et/ou aux canaux d'admission (7a).
  13. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'à au moins l'un des orifices d'entrée (2a, 2b) est associé(e) une plaque de renvoi (20) et/ou un transmetteur de la direction d'écoulement (22), lequel recouvre et/ou délimite latéralement au moins en partie l'orifice d'entrée (2, 2a, 2b) correspondant.
  14. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément mélangeur (13) comporte au moins une chambre de débit (25) voisine de la chambre d'accumulation (14), laquelle est en liaison fluidique avec l'espace de mélange par l'intermédiaire d'un orifice de passage (25).
  15. Mélangeur selon la revendication 14, caractérisé en ce que la section transversale de l'au moins une chambre de débit (25) qui se situe à la perpendiculaire de la direction d'évacuation de la matière s'élève à de 80 % à 120 % de la section de l'orifice de passage (25) qui se situe à la perpendiculaire de la direction d'évacuation de la matière.
  16. Mélangeur selon l'une quelconque des revendications 14 ou 15, caractérisé en ce que l'au moins une chambre de débit (25) est délimitée dans la direction d'évacuation de la matière par une paroi (26) transversale et en ce que la paroi transversale (26) comporte un orifice (27) de paroi transversale.
  17. Mélangeur selon l'une quelconque des revendications précédentes, caractérisé en ce que la section transversale de l'élément mélangeur (13) qui se situe à la perpendiculaire de la direction d'évacuation de la matière s'élève dans la section de la chambre d'accumulation (14) et/ou de la chambre de débit (24) à de 105 % à 150 % de la section transversale de l'élément mélangeur (13), située à la perpendiculaire de la direction d'évacuation de la matière dans la section suivante.
EP18746917.6A 2017-07-28 2018-07-26 Melangeur avec canal de compensation et/ou chambre d'accumulation Active EP3658266B1 (fr)

Applications Claiming Priority (3)

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DE102017117198.3A DE102017117198A1 (de) 2017-07-28 2017-07-28 Mischer
DE102017117199.1A DE102017117199A1 (de) 2017-07-28 2017-07-28 Mischer mit Kompensationskanal und/oder Staukammer
PCT/EP2018/070344 WO2019020768A1 (fr) 2017-07-28 2018-07-26 Mélangeur avec conduit de compensation et/ou chambre de stockage

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EP3658266B1 true EP3658266B1 (fr) 2023-02-22

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EP18746915.0A Pending EP3658265A1 (fr) 2017-07-28 2018-07-26 Mélangeur

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KR20200032731A (ko) 2020-03-26
EP3658266A1 (fr) 2020-06-03
US20200171448A1 (en) 2020-06-04
CN111050893A (zh) 2020-04-21
US11986785B2 (en) 2024-05-21
CN111050894A (zh) 2020-04-21
US20210154628A1 (en) 2021-05-27
CA3070174C (fr) 2022-03-22
JP6994112B2 (ja) 2022-01-14
CA3070150C (fr) 2022-07-19
EP3658265A1 (fr) 2020-06-03
BR112019024621A2 (pt) 2020-06-16
WO2019020768A1 (fr) 2019-01-31
CA3070150A1 (fr) 2019-01-31
WO2019020764A1 (fr) 2019-01-31
BR112019024617A2 (pt) 2020-06-16
JP2020530390A (ja) 2020-10-22
US11717794B2 (en) 2023-08-08
KR102513669B1 (ko) 2023-03-24
CA3070174A1 (fr) 2019-01-31
JP7100127B2 (ja) 2022-07-12
KR102431025B1 (ko) 2022-08-11
JP2020529317A (ja) 2020-10-08

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