DE2102861A1 - High throughput mixer - for rapidly reacting liquid components,esp starting materials for polyurethanes - Google Patents

Abstract

Known appts. for the continuous metered mixing of >=2 relatively rapidly inter-reactory liquid components, particularly in large quantities, comprising an axially feeding mixing rotor of conical shape provided with a series of radially outward directed projections and supported in a mixing chamber with a conical inner surface and with a feed unit for the components at one end and a discharge outlet for the mixed components at the other end, is improved by constructing the mixing chamber as well as the rotor so that they diverge from the feed unit (particularly a valve block) to the outlet and the projections on the rotor take the form of a series of axially spaced rings together with intersecting strips running along the line of the cone surface.

Description

Device for continuous and metered mixing of at least two rapidly rearranging components, especially in large quantities. The invention relates to a device for continuous and metered mixing of at least two liquid components which react relatively quickly with one another, in particular in large quantities and of preferably basic components for the production; of polyurethane plastics, with a mixing chamber having a conical inner surface, one coaxial in this mounted, also conically shaped, axially conveying mixing rotor, which has a plurality of radially outwardly directed protrusions, and one on one End of the mixing chamber arranged feed device for the components together with one at the other end intended outlet for the component mixture.

There are already devices of the type mentioned are known in which However, the throughput through the mixing chamber - based on a perfect mixture of each other reacting components - relatively low is. Therefore, the volume of objects that can be manufactured in this way is intermittent Operation limited upwards. An enlargement of the mixing chamber turned out to be disadvantageous, because the available time interval in which the components are not yet react essentially with one another, for example foaming, is limited. at Exceeding this time interval results in obvious difficulties, because then the components already react in the mixing chamber. Nor is it expedient to assign several smaller mixing chambers to a single metering system and to load a mold used for the production of the object together, because there are difficulties in terms of an even distribution and Dosage of the components on the individual mixing chambers result.

The purpose of the invention is to create a state of the art Technique improved device, with which large throughputs per unit of time in a relatively small mixing chamber with a given good mixing quality are. This is generally achieved in that the mixing chamber and the mixing rotor starting from the feed device to the outlet are designed to diverge and that the projection of the mixing rotor is in the form of a plurality of axially spaced apart Rings as well as strips running along the surface of the cone and penetrating the rings are trained. Such a design of the mixer rotor according to the invention is achieved that the supplied components as a result of the bars over carried centrifugal force against the conical inner surface the mixing chamber pressed and as a result of an axial component resulting from the parallelogram of forces be promoted against the mixing chamber outlet, resulting in large throughputs per unit of time with a relatively small mixing chamber and a small annulus volume between the mixing rotor as well as the mixing chamber, while in addition an intensive mixing of the Components takes place, in particular through those interacting with the strips Rings, which the axial advance of the Eomponentengemisches along the inner surface hinder the miachkainmer.

The mixing chamber designed according to the invention together with the associated mixing rotor can be used particularly advantageously in connection with a feeding device, which one is arranged directly at the tapered inlet-side end of the Miechkammer Valve block with at least two jointly actuated, one radial outlet passage each has send axially parallel hollow valve plugs whose cavities are constantly each are connected to an assigned component supply line and their axes of rotation run perpendicular to the axis of the mixer rotor, one in each valve block from the circumferential area of each chick facing the mixing chamber, a short one straight inlet channel into the inlet end of the mixing chamber and one more each Ventilation and return duct offset at an angle to this via an assigned pipeline each run in a component receptacle.

By the specified configuration according to the invention the Feed device can be the inlet channels because of the small distance between make the circumferential area of each chick facing the mixing chamber extremely short, so that with a given cross-section of the inlet ducts, their volume is very small. This in turn means that after the dosing process has ended, practically the entire Amount of the introduced components to react with one another without in the inlet channels are left with residual amounts of the components that the mixing chamber does not are fed.

The feed device according to the invention thus improves the mode of operation the assigned mixing chamber itself and contributes to a further optimization of the The solution to the problem of achieving high throughputs of the components per unit of time in one to achieve a relatively small mixing chamber with good mixing quality.

One designed in the manner mentioned above is particularly favorable to operate the feed according to the invention in the direction in connection with a dosing system, in which one hollow plunger piston guided in a dosing cylinder each to one Valve plug leading component line is assigned, wherein in per se known Make the strokes of the plunger proportionally according to the desired component mixing ratios are synchronized.

Plungers for the dosing system are therefore in the present case advantageous because an exactly axial guidance of the plunger for introduction exactly more dosed Component quantities in the component feed lines of the valve block is not required. This in turn makes it possible to adjust the strokes of the plunger by a relatively simple, known, mechanical device synchronize, for example in the form of a pivotable about a fixed bearing point common lever arm, at different distances from the bearing point the plungers according to the desired component mixing ratios or piston rods attached to these are articulated. One by actuation This lever arm caused slight tilting of the plungers in the dosing cylinders In no way affects the dosing accuracy. Furthermore, a possible Leakage of the plunger immediately at the leakage of component material between the dosing cylinder as well as the plunger can be recognized, which enables quick troubleshooting enables, in contrast to pistons sealed with piston rings, in which a leakage is not manifested by material leakage from the cylinder.

The invention is explained in more detail below with reference to the drawings. 1 shows an exemplary embodiment of part of a device according to the invention containing a conical mixing chamber together with a mixing rotor and one attached to the mixing chamber attached valve block as part of a component feed Facility in an axial section or axially parallel section, FIG. 2 is a section along the Line II - II from Pig.

1, with the one in Pig. 1 mixing rotor shown for clarity is left out, Pig. 3-5 the device parts according to FIG. 1, 2 in one Sectional representation similar to FIG. 2 in three different operating positions corresponding to "Filling", "Mixing" and checking the output ", Fig. 6, the device parts According to FIG. 1, 2 in a plan view parallel to the sectional plane II-II of FIG. 1, FIG. 7 shows an exemplary embodiment of a mixing rotor that is somewhat modified compared to FIG. 1 together with the mixing chamber in axial section, FIG. 7 a a section along the line VIIa - VIIa of FIGS. 7, 8, 9 are further embodiments which are modified from FIGS. 1 and 7 a mixing rotor according to the invention in a perspective view, FIG. 10 a Exemplary embodiment of a device according to the invention containing the device parts according to FIGS. 1-7 Device in the operating position 'ISUllen' as well as in a schematic Overall view, FIGS. 11, 12, 13 the device according to FIG. 10 in the operating positions "Filling finished", "Mixing" or "Check output1 ,.

According to FIGS. 1 and 7, one has a conical inner surface Mixing chamber 1 a likewise conical, axially conveying mixing rotor 2 coaxially mounted on one side on a drive shaft 15.

The mixing chamber 1 and the mixing rotor 2 are based on a a supply device comprising a valve block 3 to a tangential pipe socket formed outlet 16 formed diverging towards. The mixing rotor 2 has projections in the form of a plurality of axially spaced rings 17, 18, 19 (in which Embodiment according to Fig. 7,7a rings 17, 18, 18a, 19) as well as along conical surface lines running, the rings penetrating strips 20, 21, 22, 23, of which only four adjacent bars are provided with reference numbers.

In the exemplary embodiments according to FIGS. 1-5 and 7.7a, the run Planes of the rings 17-19 perpendicular to the axis of the mixer rotor 2. As can be seen clearly from Fig. 7,7a, the radial width of the rings 17-19 exceeds that of strips 20-23. The strips 20-23 are arranged alternately radially offset, the one group of strips to which the strips 20, 22 belong directly against the outer surface of the mixing rotor 2, while the other Group of strips to which the strips 23 belong, with their radially outer ones Surfaces with the circumference of the rings 17-19 are flush. At least one of the bars of the mixing rotor 2, in the present case the bar 21, which is designed as a scraper is, stands with its radially outer surface over the circumference of the rings 17-19 radially slightly in front (Fig. 7a), in order to possibly adhere to the inner surface of the mixing chamber 1, Remove component residues that react with one another, with a self-cleaning process the mixing chamber is effected.

In the embodiment according to FIGS. 1-5, 7, 7a, the mixing rotor is 2 at its end facing the feed device or the valve block 3 in the manner of a truncated cone cut off. As can be seen in particular from FIG. 7, this results in a better one Material introduction through the inlet channels 10, 11.

In the embodiment according to FIGS. 1-5, 7, 7a, the strips end 20 - 23 alternate with the frustoconically cut end of the mixer rotor 2 (strips 20, 22) or protrude beyond this end (strips 21, 23). One so far The embodiment of the mixing rotor according to FIG. 8, in which the reference numerals are analogous to those in Pig. 1, 7, 7a but with an index line provided, are selected. The advantage of alternately shortened lasts on the tapered one At the end of the mixing rotor 2, there is also a better material feed through the inlet channels 10, 11.

The mixing rotor according to FIG. 8 has the feature as a further special feature on that the rings 17 '- 19 with axial passages distributed over their circumference 25 'are provided with circular cross-section.

Depending on the viscosity of the mixture by the mixing rotor 2 to the outlet t6 to be conveyed components can be the passages 25 'at higher Viscosities of the components as favorable in terms of facilitating the axial Prove pass.

The mixing rotors 2 'and 2 "according to FIG. 8 and 9 have at their enlarged Each end has a cylindrical end section 24 'or 24 ", which is provided with a screw groove is provided to prevent undesired leakage of material.

In the case of the mixing rotor according to Fig. 9, which has analogous reference numbers as in Fig. 1, 7, 7a, but with double index marks, are only two rings 17 ", 18" are provided, which are strongly shaped to the valve block 3 (Fig. 1) are formed towards diverging frustoconical shells.

The mixing rotor 2 ″ also goes into a cylindrical one at the outlet of the mixing chamber End section 24 "across.

If in operation of the device parts according to FIGS. 1-5 or 7, 7a at Rotation of the mixing rotor 2 within the mixing chamber 1 via the inlet channels, at the present embodiment, the two inlet channels 10, 11, two with each other quick responding liquid components, especially basic components for the production of polyurethanes, get into the interior of the mixing chamber 1, so is on the two liquid components through the strips 20-23 respectively, the in Figures 7, 7a, three groups of ledges 20-23 illustrate a substantial one Centrifugal force exerted so that the two components with considerable force be pressed against the conical inner surface of the mixing chamber 1. Between the bars 23 and the rings 17-19 on the one hand and the inner surface of the mixing chamber 1 on the other hand However, if there is only a very small distance or annular space 26 (Fig. 7a), between the strips 21 and the inner surface of the mixing chamber 1 is even practical no distance, so that the two liquid components, which are capable of corresponding Dosage when feeding through the inlet channels 10, 11 practically the entire Space between the outer surface of the conical mixing rotor 2 and the inner surface the mixing chamber 1 fill, be forced, when viewed in the cross-sectional view 7a, alternating radially outside a strip 20 in a zigzag fashion, radially inside a bar 21, radially outside a bar 22 and radially inside a bar 23 to run, as indicated by the dash-dotted arrows 27 in Fig. 7a is indicated. With a correspondingly high circumferential speed of the strips 20-23 arise against the direction of rotation behind each bar swirling and / or Cavitation phenomena, as indicated by bent dash-dotted arrows 28 in Fig. 7a is indicated.

These processes lead to an intensive mixing of the components. At the same time is on the components or the component mixture a radially outward centrifugal force according to the force vector Kz in Fig. 7 exercised, which runs in a perpendicular to the jacket inner surface of the mixing chamber 1 Reaction force Kr and a feed force Kv running along the lateral surface can be.

The speed of the mixing rotor 2, the design of the rings 17-19 and the strips 20 - 23 and the throughput per unit of time through the inlet channels 10, 11 during the dosing process are chosen so that those entering the mixing chamber 1 Components during the mixing process by themselves as a result of the effect of the yorschat force of the force vector Kv are conveyed from the inlet channels 10, 11 to the outlet 16, which is formed in the form of a pipe socket attached tangentially to the mixing chamber 1 is.

The time it takes for the component mix to pass through the mixing chamber 1 required by the inlet channels 10, il up to the outlet 16, is coordinated so that that a substantial reaction of the components only after leaving the outlet 16 occurs.

To clog the space between the radially outer surfaces to prevent the rings 17-19 and the strips 21, 23 in any case, the Bars 21 because of their direct contact against the inner surface of the mixing chamber 1 as a scraper, as mentioned above, so that - also with In contrast, acceptance of a worsened mixing effect of the strips 21 to the strips 23 -the discharge directly on the inner surface of the Mixing chamber 1 adhesive component mixtures guaranteed by permanent scraping of the surface is.

The inlet channels 10, 11 can either - as illustrated in FIG. 7 - Axially or - as illustrated in Fig. 2-5 - slightly converging into the mixing chamber 1 join. According to an exemplary embodiment not particularly illustrated the inlet channels 10, 11 of the feed device can also come from a central channel and an annular channel surrounding it which is coaxial with the mixing chamber 1 run.

According to a further special embodiment, the mixing rotor 2 diverges somewhat more strongly than the conical inner surface of the mixing chamber 1 be designed in such a way that in each cross-sectional plane the surface area between the outer circumference of the mixing rotor 2 and the inner surface of the mixing chamber 1 formed annulus is always the same, one obtains in this way taking into account the conical divergence of mixing chamber 1 and mixing rotor 2 is essentially the same average speeds over the entire length of the miso rotor 2 and thus one even axial pressure distribution. According to a further embodiment of this embodiment the cross-sections of the between the outer circumferential surfaces of the rings 17-19 and the inner surface of the mixing chamber 1 formed annular spaces 26 over at least one large Part of the axial length of the mixer rotor 2 is equal be trained preferably such that the radial width of the between the outer circumferential surfaces the rings 17-19 and the inner surfaces of the mixing chamber 1 formed annular spaces 26 deviates over at least a large part of the axial length of the mixing rotor 2 of Fig. 1, 7, 7a increases.

All of the modification features specified above can be used to the mixing rotor 2 as well as the mixing chamber 1 exactly to the Eomponenten mixture to be processed respectively.

its characteristics, in particular with regard to viscosity and reaction speed, to interpret.

According to FIGS. 1-5, the valve block already briefly mentioned above is shown 3 arranged directly at the tapered inlet-side end of the mixing chamber 1 and takes two jointly operated, one radial outlet passage 30 or 31 having axially parallel hollow valve plugs 40 and 41, respectively. The axes of rotation of the Valve plugs 40, 41 run perpendicular to the axis of the mixing rotor 2 or the mixing chamber 1, and the cavities of the valve plugs 40, 41 are always with an associated, from below opening components supply line 6 or 7 in connection. The inlet ducts 10, 11 extend from the peripheral areas of each plug facing the mixing chamber 1 40, 41 on the shortest straight path into the inlet-side end of the mixing chamber 1, as can be seen in particular from FIGS. 2-5.

Each plug 40, 41 is a further one opposite the associated inlet channel 10, 11 offset by about 1800 Ventilation and return duct 8 or 9 assigned, each via an assigned pipeline 8 ', 9' in a component receiving container 140 and 141 (FIGS. 10-13) run. In addition, there is one in each valve block 3 associated with each plug 40, 41, by about 900 relative to the corresponding inlet channel 10 or 11 as well as the vent and return channel 8 or 9 running test channel 12 or 13 provided for ejecting the component in question. Each of the Brüfkanal 12, 13 can, according to FIG. 13, be connected to an associated collecting vessel 200 or 201 to be brought. As can be seen from FIGS. 1-5, the inlet channels are in the valve block 3 10, 11 the vent and return channels 8, 9 and the test channels 12, 13 in one Plane with the axis of the mixing rotor 2 perpendicular to the axes of the valve plug 40, 41 designed to run.

As can be seen in particular from FIGS. 1 and 6, runs from each Valve plug 40, 41 an axial pivot pin 29 to the outside. The pivot pins 29 are via meshing gears 35 with regard to their angle setting by means of a common Actuator in the form of a lever 36 can be actuated. Instead of the gears 35 can non-meshing sprockets are also used in conjunction with a timing chain or non-meshing gears in connection with a rack. Even Lever mechanism is possible.

According to FIGS. 2, 6, the valve block 3 also has a pressurized fluid source 50 (Fig. 10-13) via a line 51 connectable pressure flushing channel 52, which centrally to the inlet channels 10, 1t and axially into the inlet end of the mixing chamber t and / or the inlet channels 10, 11 opens. This pressure flushing channel 52 can be shut off when Inlet channels 10, 11 after the discharge in the mixing chamber 1 has been carried out Mixture of components are applied to an effective cleaning of the mixing chamber 1 to achieve.

In the position according to Pig. 2 are the chicks 40, 41 in the "Filling" position, as explained in more detail below in connection with FIGS. 10-13 is, the inlet channels 10, 11 blocked from the component feed lines 6,7 are. Components fed in through these component feed lines 6.7 are after Passing through the cavities of the chicks 40, 41 directly back to the ventilation and Return channels 8, 9 or their lines 8 ', 9' released to ensure proper filling the cavities of the chicks 40, 41 in connection with the evacuation of air pockets to ensure. This is shown by the curved arrows in FIG.

Starting from the "filling" position according to Pig. 2, which again Bruckstüokweise is shown for the sake of clarity in Fig. 3, arrives to the "mixing" position according to FIG. 4 by rotating the valve plug 40, 41 (40 in the clockwise direction, 41 in the opposite direction of the original hand, when viewed in accordance with Fig. 2,3) to the radial outlet passages 30, 31 of the chicks 40, 41 with the inlet channels 10, 11 are in alignment. As-then a metered amount of two components can be over the inlet channels 10, 11 are fed into the mixing chamber 1. Due to the special Formation of the valve block 3 together with the valve plug 40, 41 mounted therein extremely short lengths for the inlet channels 10, 11, so that practically the entire The amount of the two components fed into the mixing chamber 1 is actually combined with one another reacts, while the Resi der components remaining in the inlet channels 10, 11, which are withdrawn from the reaction, negligibly small in view of the high total amount are.

For initial setting of the device or when transitioning to A changed recipe can be checked by the chicks 40, 41 in the output position " be brought to Fig. 5, in which the radial outlet passages 30, 31 of the Chicks 40, 41 are connected to the test channels 12, 13. Instead of the valve block 3 assigned dosing system, which is described below in connection with FIGS. 10-13 will be explained, in terms of the charging of the mixing chamber 1 via the inlet channels 10, 11 to work, in the position of FIG. 5, the components are over the test channels 12, 13 are fed to the separate collecting vessels 200, 201 according to FIG. 13, as was briefly mentioned earlier.

According to FIGS. 10-13, each is leading to a valve plug 40, 41 Component line 6, 7 each one guided in a metering cylinder 101, 102 Plunger 103, 104 assigned of which the plunger 103 by means of a stationary inner piston 105, which is tightly guided therein, in two separated by pressurized fluid to be acted upon working spaces 106 and 107 is divided. In itself known Way, the strokes of the plungers 103, 104 are proportional according to the desired Synchronized component mixing ratios. For this purpose the plungers are used 103, 104 via piston rods 108, 109 to a lever arm 110 in different Distances from a fixed bearing point 111 of the same articulated.

Each metering cylinder 101, 102 is on the inlet side ae with the operating cycles synchronized shut-off valve that can be opened during a suction stroke of the plunger 112 or 113 assigned. Starting from the operating position of the device according to 10, the drive shaft of the mixer rotor 2 rotates via a motor 230 offset. The shut-off valves 112, 113 are in the open position, so that One component A is continuously fed into the metering cylinder via an associated pump 114, 115 101 and a component B can be fed into the metering cylinder 102.

Drain valves 116, 117 are normally closed and serve only for emptying the dosing system after it has been shut down. At the same time the pressurized fluid is applied to the upper interior 106 of the plunger 103, so that the Plunger piston 103, 104 according to the vertically upward arrows an upward movement perform. Since the plungers 103, 104 are only in an upper discharge manhole the dosing cylinder 103, 102 are led tightly, already arrive during the upward movement of the plungers 103, 104 the components A, 3 to the Valve plugs 40, 41 and are removed from there via the respectively assigned ventilation and return line 8 'or 9' led back into the associated container 140 or 141, wherein the inlet channels 10, 11 remain completely blocked and thus a reaction of both components cannot take place.

Are the valve plugs 40, 41 with the respective component A and B, respectively well flushed and vented and have the plungers 103, 104 in a predetermined uppermost position raised, which corresponds to the operating position according to FIG. 11, so the shut-off valves 112, 113 according to FIG. 11 are closed. The continuously running pumps 114, 115 then deliver via safety check valves 119, 120 in the circuit in the respective component container 140 or 141. The in the Dosing cylinders 101, 102 located below the plunger piston 103, 104 amounts of component A or B minus those contained in the basic position according to FIG Quantities form those component quantities that will be used in a subsequent operating cycle 12 are injected into the mixing chamber 1 according to FIG. Based on the operating position According to FIG. 11, the valve plugs 40, 41 are now in the position according to FIG. 12 brought, which corresponds to the setting of the valve plug according to FIG.

The inner working space 107 of the plunger 103 is then supplied with pressure fluid acted upon, after which the plunger 103 opposite the inner piston 105 in the direction of the arrow is pressed down and over the Lever arm 110 the plunger 104 also takes down in the direction of the arrow. This means that the exact measurements are now made Quantities of the components A, B are injected into the mixing chamber 1 via the plug 40, 41 and after complete mixing and before any substantial reaction occurs via the outlet 16 in the direction of an arrow 160 into a (not shown) foaming mold submitted. The ratio of the effective distances between the piston rods 108, 109 of the Plunger piston 103, 104 from the fixed bearing point 111 determined here together with the respective cross sections of the plungers 103, 104 the dosed amounts of the Components A, B. The particular advantage of the plungers 103, 104 over the conventional used, by means of piston rings against the inner surface of the dosing cylinder 101, 102 sealed piston lies in the fact that a possible leakage of the upper sealing collars of the metering cylinders 101, 102 opposite the plungers 103, 1Q4 causes the relevant components to escape there itself, which is immediately is noticeable, while with the known metering systems a possible leakage of the Piston only becomes apparent when grossly incorrect dosages occur.

When the dosing process has ended, the mixing chamber is blown through via the pressure flushing channel 52 according to FIG. 2 by means of a pressurized gas source 50, whereby through Injector effect also residues of the component mixture are entrained and the Miscbkainrner can leave via the outlet 16. Then the Valve plug 40, 41 again brought into the position according to FIG. 10, after which the above-mentioned Repeat operations.

Before the first commissioning of the dosing system according to Pig. 10 - 13, in the case of recipe changes and controls during ongoing production, the valve plug can be brought into the position according to FIG. 13, which of those according to Fig. 5 corresponds.

By weighing the quantities dispensed into the collecting vessels 200, 201 of components A, B, the correct functioning of the dosing system can be continuously checked.

Claims (26)

P a t e n t a n s p r ü c h e 1 device for continuous and metered mixing of at least two liquid components which react relatively quickly with one another, in particular in larger quantities, with a mixing chamber having a conical inner surface, one coaxially mounted in this, also conically shaped, axially conveying Mixing rotor, - which has a plurality of radially outwardly directed projections, and a feed device for the components arranged at one end of the mixing chamber in addition to an outlet for the component mixture provided at the other end, thereby characterized in that the odischkammer (1) and the mixing rotor (2) starting from of the feed device (in particular valve block 3) diverging towards the outlet (16) are formed and that the projections of the mixing rotor (2) in the form of a plurality rings arranged at axial intervals (17 to 19) as well as conical lines running along the surface of the cone, the rings piercing strips (20 to 23) are formed. 2. Apparatus according to claim 1, characterized in that the planes of the rings (17> to 19) perpendicular to the Axis of the mixing rotor (2) get lost. 3. Device according to one of claims 1 and 2, characterized in that that the radial width of the rings (17 to 19) exceeds that of the strips (20 to 23) and that the strips are arranged alternately radially offset, one group of strips (20, 22) directly against the outer circumferential surface of the mixing rotor (2) rests and the other group of strips (23) with their radially outer surfaces are flush with the circumference of the rings. 4. Device according to one of claims 1 to 3, characterized in that that at least one of the strips (21), which is designed as a scraper, with its radially outer surface over the circumference of the rings (17 to 19) protrudes radially slightly. 5. Device according to one of claims 1 to 4, characterized in that that the rings (17 ", 18" in Fig. 9) in the form of strongly diverging truncated cone shells are trained. 6. Apparatus according to claim 5, characterized in that the divergence direction of the rings (17 ", 18t ') designed as truncated cone shells to the feed device (In particular valve block 3 is directed towards. 7. Device according to one of claims 1 to 6, characterized marked, that the mixing rotor (2) at the outlet (16) of the mixing chamber (1) in a cylindrical End section (24 'or 24 "in Fig. 8, 9) passes. 8. Device according to one of claims 1 to 7, characterized in that that the mixing rotor (2) at its the feed device (in particular valve block 3) facing end is truncated like a truncated cone (Fig. 1, 7, 8). 9. Apparatus according to claim 8, characterized in that the strips (20 to 23) alternate with the frustoconically cut end of the mixer rotor (2) end or reach beyond this end. 10. Device according to one of claims 1 to 9, characterized in that that the rings (17 'to 19' in Fig. 8) with axial passages distributed over their circumference (25 ') are provided. 11. Device according to one of claims 1 to 10, characterized in that that the feed device (in particular valve block 3) at least two axially or Inlet channels (10, 11) opening into the mixing chamber (10) in a slightly convergent manner. 12. The device according to claim 1, characterized in that the inlet channels (10,11) of the feed device (especially valve block 3) a central channel and a channel surrounding it, which are coaxial to the mixing chamber (1) run. 13. Device according to one of claims 1 to 12, characterized in that that the outlet (16) is in the form of a pipe socket attached tangentially to the mixing chamber is trained. 14. Device according to one of claims 1 to 13, characterized in that that the mixing rotor (2) opposite the conical inner surface of the wiping chamber (1) is formed somewhat more divergent. 15. The device according to claim 14, characterized in that the Cross section of the between the outer circumferential surface of the mixing rotor (2) and the inner surface the mixing chamber (1) formed annular space over at least a large part of the axial length of the mixing rotor is designed the same. 16. The device according to claim 15, characterized in that the Cross-sections between the outer circumferential surfaces of the rings (17 to 19) and the Inner surface of the mixing chamber (1) formed annular spaces (26) over at least one large Part of the axial length of the mixer rotor (2) are formed the same. 17. Device according to one of claims 1 to 16, characterized in that that the radial width of the between the outer circumferential surfaces of the rings (17 to 19) as the inner surface of the mixing chamber (1) formed annular spaces (26) over at least one large part of the axial length of the mixing rotor (2) are increasingly formed. 18. Device according to one of claims 1 to 17, characterized in that that the feed device has one directly at the tapered inlet-side end the mixing chamber (1) arranged valve block (3) with at least two jointly actuating, each having a radial outlet passage (30, 31) having axially parallel has hollow valve plugs, the cavities of which are constantly connected to an associated component supply line (6,7) are connected and their axes of rotation perpendicular to the axis of the mixer rotor (2) run, and that in the valve block (3) each one of the mixing chamber (1) facing circumferential area of each plug (40, 41) outgoing short straight Inlet channel (10, is in the inlet-side end of the i (isohkammer) and one further each Ventilation and return ducts (8, 9) offset at an angle to this via an associated one Pipeline (8 ', 9') each run in a component receiving container C140, t41). 19. Device according to one of claims 1 to 18, characterized in that that in the valve block (3) additionally one each valve plug (40, 41) assigned, at an angle to the corresponding injection channel (10, 11) and the vent and Return duct (8, 9) running test channel (12, t3) for the discharge the component in question is provided, which is provided with an associated collecting vessel (200, 201 in Fig. 13) in connection - is to be brought. 20. Device according to one of claims 1 to 19, characterized in that that the cavity of each valve plug (40, 41) is open at the bottom and the associated Component supply line (6, 7) opens from below into the cavity of the valve plug. 21. Device according to one of claims 1 to 20, characterized in that that in the valve block (3) all inlet channels (10, 11), ventilation and return channels (8, 9) and possibly test channels (12, 13) in a plane with the mixing rotor axis run perpendicular to the axes of the valve plug (40, 41). 22. Device according to one of claims 1 to 21, characterized in that that the valve plugs (40, 41) each have an axial pivot pin (29) and intermeshing Gearwheels (35) or sprocket wheels together with timing chain or rack with regard to their angle setting can be actuated by means of a common actuator (lever 36) are. 23. Device according to one of claims 1 to 22, through this characterized in that the valve block (3) is also connected to a source of pressurized fluid (50) has connectable pressure flushing channel (52) which is central to the inlet channels (10, ii) and axially into the inlet end of the mixing chamber (1) and / or the Inlet channels (10, 11) open and with blocked injection channels (10, 11) after carried out discharge of the component mixture contained in the mixing chamber (1) can be acted upon. 24. Device according to one of claims 1 to 23, characterized in that that each component feed line (6, 7) leading to a valve plug (40, 41) each associated with a plunger (103, 104) guided in a metering cylinder (101, 102) is, of which at least one, which is formed hollow, by means of one therein tightly guided stationary inner piston (105) in two separately with pressure fluid acting working spaces (106, 107) is divided, and that in per se known Make the strokes of the plungers (103, 104) proportionally according to the desired Component mix ratios are synchronized. 25. Device according to one of claims 1 to 24, characterized in that that the plungers (103, 104) at a common, around a fixed bearing point (111) pivotable lever arm (110) at different distances from the bearing point are hinged according to the desired component mixing ratios. 26. Device according to one of claims 1 to 25, characterized in that that each metering cylinder (101, 102) is synchronized on the inlet side with the operating cycles is the shut-off valve to be opened during a suction stroke of the plunger piston (103, 104) (116, 117) is assigned. L e r s e i t e