EP1595593A1 - Biaxial mixer for mixing products of high viscosity, as pasty printing inks - Google Patents

Abstract

The bi-axial mixer, especially for the mixing of a product with a high viscosity such as a paste-form printing ink, has a U-shaped clamping frame (4) with co-axially orientated rotary plates (5,5') on the U-members formed as clamping jaws between which is clamped a holder for the mixing product. A dynamic unbalanced mass is created on the clamping frame by a corresponding mass distribution (26,27) which counteracts a gyroscopic torque resulting from the rotational speed of at least one rotary plate and compensates for this in its action on the clamping frame or at least reduces it.

Description

The invention relates to a biaxial mixer, in particular for mixing a High mix viscosity mix such as pasty ink after Preamble of claim 1.

A generic known biaxial mixer (EP 0 796 652 B1) a U-shaped clamping frame with equiaxed against each other Turntables on the formed as clamping jaws U-legs, between where a mix container is clamped. The clamping frame is one perpendicular and centered to the U-base and parallel to the U-legs Clamping frame rotation axis with a specific clamping frame speed rotationally driven. At least one turntable and thus the clamped Mischgutbehälter is about a turntable axis lying perpendicular to the clamping frame axis of rotation rotatably driven at a certain turntable speed.

In addition, a support frame is arranged in a mixer housing of the biaxial mixer, wherein in the U-shaped clamping frame, the U-base in the manner of two guide columns is formed, which lie in a vertical plane to where the jaws held displaceable and a spindle drive with the same travel with respect to a horizontal clamping frame axis of rotation are displaceable. For the rotation of the clamping frame is a motor drive provided and by means of a bevel gear and a turntable drive shaft is the turntable drive for a turntable to the clamping frame rotation coupled. On the turntable axis and during a clamping process longitudinally displaceable and rotatably transmitting to the turntable drive shaft is in each case a pulley for a drive belt for transmission the rotational movement of the turntable drive shaft on the turntable appropriate.

In the basic position of the clamping frame, the two turntables are vertical one above the other, with the driven turntable at the top and the freely rotating one Turntable is down. The lower jaw also includes one Turntable extract on the turntable is rotatably mounted and with the this can be pulled out of the housing. By this relative heavy turntable extension is the lower jaw usually heavier than the upper jaw without the pull-out device, so that without additional measures when turning around the jaw rotation axis Imbalance would occur, which leads to noise, high component loads and cause shaking and traveling movements of the housing can. In addition, the distance between the center of gravity of the bearing jaws with respect to the bearing point of the clamping frame not the same, which also Imbalances generated. The clamping frame is therefore static and dynamic with respect to the horizontal clamping frame axis of rotation and a vertical axis balanced by the clamping frame rotation axis. For the previous maximum used speeds up to 200 rpm were these balancing measures for a satisfactory smoothness of the generic biaxial mixer suitable and sufficient - are influences of the turntable and mix rotary motion at these speeds, relatively small and can with the previous Auswuchtmaßnahmen Neglected to achieve a satisfactory smoothness become.

With the above biaxial mixer, good mixing results are economical acceptable mixing times with suitable container weights of approx. 0.5 kg up to 35 kg for different mixes with mixed material viscosities up to approx. 10 Pascal · sec (Pa · s). At higher Mischgutviscosities is the Mixing function even at the maximum 200 rpm so reduced that no good mixing results can be achieved with acceptable mixing times. higher Revolutions above about 200 rpm for a possible improvement of the Mixing result in high-viscosity blended goods are despite the known Balancing measures not possible because then still the required Smooth running of the biaxial mixer with reasonable noise development, required Stability, etc. is no longer achievable. Moreover, this is so far bevel gear used to connect the turntable drive to the Clamping frame rotation at higher than previous maximum speeds in terms of noise, lubrication and tool life problematic.

For highly viscous mixed materials, in particular for pasty printing inks whose Viscosities regularly at about 30 Pa · s to over 1000 Pa · s are, stand currently none for a practicable mixture in closed containers Mixing devices available. Such inks or equivalent High-viscosity materials have so far in open containers with considerable Stirred effort and long mixing times.

The object of the invention is to develop a generic biaxial mixer so that he also for the mixture of highly viscous mixed materials, in particular pasty printing inks can be used.

This object is achieved with the features of claim 1.

In accordance with claim 1, a dynamic imbalance is on the tenter generates an associated mass distribution which counteracts the gyroscopic moment, which by the turntable rotation and thus the Mischgutbehälterdrehung caused and in addition to the clamping frame rotation caused jaw moments occurs. Through this deliberately induced imbalance in terms of jaw moments a particularly occurring at higher tenter frame speeds high Rotor torque balanced or at least reduced so much that a required Smooth running and positional stability of the biaxial mixer during operation is guaranteed.

With the above inventive measure thus a biaxial mixer operated at much higher speeds than before, which also in highly viscous mixtures, in particular pasty inks, imprinted flows in the mix are sufficiently excited, which to a mixture and homogenization of Mischgutmaterialien to lead. The range of use of biaxial mixers is thus advantageous extended.

According to claim 2, the mass distribution on the clamping frame should be designed so that the sum of the clamping jaw torque (M _{Dyn, 1} ) of the one clamping jaw and the clamping jaw torque (M _{Dyn, 2} ) of the second clamping jaw corresponds to the _gyroscopic moment (M _gyroscope ), so that the vectorial sum M Dyn, 1 + M Dyn, 2 + M roundabout = 0 is.

For this ideal case, the disturbing influence of high speed is the Fully balanced gyroscopic moments.

Another criterion for a smooth running even at high speeds consists according to claim 3 is that the mass distribution on the clamping frame is designed so that the relative to the clamping frame rotation axis acting as a two-sided lever clamping frame is statically balanced and the radial with respect to the clamping frame rotation axis and caused by the clamping frame speed centrifugal force (F _{Flieh, 1} ) on one jaw and the centrifugal force (F _{Flieh, 2} ) on the second jaw are the same size, so that the vectorial sum of the centrifugal forces F Fly, 1 + F Fly, 2 = 0 is.

The component assembly in the U-base area with the guide columns, the Spindle drive, etc. is with respect to the clamping frame rotation axis anyway largely symmetrical, so that only a small amount disturbing Torques and imbalances emanate and the essential measures for the smooth running on the outgoing of the jaws Jaw moments and the gyroscope are directed.

According to claim 4 is as a clamping device for the clamping jaws with their Turntables proposed a known spindle drive, with which the Clamping jaws about the same clamping paths with respect to the clamping frame axis of rotation are displaced, which advantageously each the distance between the centers of mass the two jaws of the clamping frame axis of rotation in all clamping positions, especially at different container heights, is equal to.

x₁, x₂

Abstand der Massenschwerpunkte der Spannbacken vom Spannrahmen-Lagerpunkt in Richtung der Spannrahmen-Drehachse

z₁, z₂

Abstand der Massenschwerpunkte der Spannbacken senkrecht zur Spannrahmen-Drehachse

ω_D

Winkelgeschwindigkeit der Drehteller um die Drehteller-Drehachse

ω_S

Winkelgeschwindigkeit des Spannrahmens um die Spannrahmen-Drehachse

m₁, m₂

jeweilige Massen der Spannbacken

   und MKreisel = -ωD· ωS (IKonst. + IGefäß)       mit

I_Konst.

konstanter, konstruktionsbedingter Anteil des Massenträgheitsmoments

I_Gefäß

Massenträgheitsmoment des jeweiligen Gefäßes mit Mischgut

      sowie
         ω_D = 0,5 bis 2 mal ω_S. In a particularly preferred embodiment of the biaxial mixer according to claim 5, the tenter frame speed is in a range of 0 to 1000 U / min, preferably from 300 to 700 U / min. A corresponding tenter frame speed can be fixed or adjusted depending on the mix and the size of the container also controlled. The turntable speed or the associated turntable angular velocity ω _D should be in a range of 0.5 to 2 times the tenter frame speed or the associated tenter frame angular velocity ω _S. Experiments have shown that in such a design excellent mixing results can be achieved. The moments arise in this interpretation as follows: M Dyn, 1 = x 1 · Z 1 · Ω S 2 · M 1 M Dyn, 2 - x 2 · Z 2 · Ω S 2 · M 2 With

x ₁ , x ₂

Distance of the center of gravity of the clamping jaws from the clamping frame bearing point in the direction of the clamping frame axis of rotation

z ₁ , z ₂

Distance between the center of gravity of the clamping jaws perpendicular to the clamping frame axis of rotation

ω _D

Angular speed of the turntables around the turntable axis of rotation

ω _S

Angular velocity of the clamping frame around the clamping frame rotation axis

m ₁ , m ₂

respective masses of the clamping jaws

and M roundabout = -ω D · Ω S (I Const. + I vessel ) With

I _Konst.

constant, design-related proportion of the mass moment of inertia

I _vessel

Mass moment of inertia of the respective vessel with mix

such as
ω _D = 0.5 to 2 times ω _S.

From the above equations for the moments, it can be seen that in the equations for M _{Dyn, 1} and M _{Dyn, 2,} the tenter angular velocity ω _S is quadratic but linear in the equation for the gyro moment M _gyro . In the equation of the gyroscopic moment, if the turntable angular velocity ω _{D is} approximately in the range of the tenter angular velocity ω _S , then the factor ω _D · ω _{S is} approximately equal to the factor ω _S ² in M _{Dyn, 1} and M _{Dyn, 2} . This means that the compensation of the gyro torques with the same geometric arrangement for the targeted unbalance at different clamping frame angular velocities ω _{S works} with good results and not for changing angular velocities or speeds different geometric settings of balancing weights are required.

In addition, depending on the used Mischgutgebinde the moment of inertia I _{vessel is} variable and different, in particular, the shape of the container vessels is observed. If the distances of the centers of gravity z ₁ , z _{2 of} the jaws are large, resulting in accordance with M _{Dyn, 1} and M _{Dyn, 2} correspondingly large dynamic counter torques, which can counteract a large centrifugal moment. For smaller containers and thus smaller container vessel heights, the moments are all correspondingly smaller, but in turn have an appropriate effect on compensation.

The required mass distribution for deliberately inventively brought about Imbalance can already from the outset due to the constructive Conditions exist or by appropriate component arrangements be achieved. If necessary, this mass distribution can after Claim 6 also by attaching balancing weights to the Clamping jaws are reached and adjusted.

It has been shown that for larger containers with large container vessel heights Less high tenter frame speeds required for a good mixing result are, compared to small containers with small container vessel heights. In claim 7 this is for an automated adjustment of the tenter frame speeds suggested that the jaw adjustment for Clamping of a mixed goods container controlled by a motor and the Travel range for determining the respective vessel height is detected accordingly Then, automatically by a controller, the appropriate tenter frame speed specified.

As already stated, have so far for the coupling of the turntable drive bevel gear used on the tenter drive the disadvantage that they are at the high tenter frame speeds provided here run unfavorably noisy and the lubricant thrown by centrifugal forces be, so that in particular the maintenance is expensive. With Claim 8 is therefore claimed an alternative turntable drive, for the also independent protection is claimed. These are the two end pages of spaced guide columns connected by a yoke part, on the both spaced belt pulleys with coaxial, vertical to the clamping direction and clamping frame axis of rotation lying axes of rotation and a drive pulley is arranged. The drive pulley is end with an axis parallel to the guide columns running Turntable drive shafts connected, wherein for the drive a first Drive belt, preferably with a circular diameter around the fixed Pulley, belt pulleys and drive pulley is looped. On the turntable axis and during a clamping process are longitudinally displaceable and rotationally transmitting to the turntable drive shaft each mounted a pulley for a second drive belt, the in a conventional manner, the rotational movement of the turntable drive shaft transfers to the turntable. In this belt drive, the above described noise problems and maintenance problems not or only considerably reduced to.

In a constructive development of a generic biaxial mixer can in a suitable arrangement according to claim 9 for adjusting the dynamic unbalance a directly driven turntable to a coaxially mounted, but jaw-resistant and non-rotating counterbalance weight be assigned. The other without a clamped Mixing container free-rotating turntable is known per se Way mounted on a Auszugeinrichtung, here a balance weight on the associated jaw part offset to the turntable axis of rotation is closer to the tension frame bearing to install.

In a further embodiment of the biaxial mixer, in particular with regard to on the possible high speeds and the resulting large forces is proposed with claim 10, that with a housing part and / or Support frame part of the biaxial mixer is connected to an acceleration sensor. When exceeding an acceleration limit value determined by an evaluation unit is by means of a control device an emergency stop function activated and the rotary drive is switched off and braked.

Reference to a drawing, the invention is explained in detail.

Fig. 1

eine schematische Seitenansicht eines Biaxialmischers,

Fig. 2

eine schematische Frontansicht des Biaxialmischers,

Fig. 3

eine schematische Perspektivdarstellung des Biaxialmischers, und

Fig. 4

eine schematische Seitenansicht des Biaxialmischers, wobei die auftretenden Kräfte und Momente eingezeichnet sind.

Show it:

Fig. 1

a schematic side view of a biaxial mixer,

Fig. 2

a schematic front view of the biaxial mixer,

Fig. 3

a schematic perspective view of the biaxial mixer, and

Fig. 4

a schematic side view of the biaxial mixer, wherein the forces and moments are drawn.

In Fig. 1 is a schematic side view of a biaxial mixer 1 for Mixing of a mix with high Mischgutvisiskosität shown. The biaxial mixer 1 has a support frame 2, which is arranged in a mixer housing 3 is. On a U-shaped clamping frame 4 of the biaxial mixer 1 are two equiaxed against each other turntable 5 and 5 'to the as Chucking 6 and 6 'formed U-legs arranged. In the in Fig. 1 illustrated basic position of the biaxial mixer 1 are two guide columns 7, which form the U-base of the clamping frame 4, aligned vertically, so that the two turntables 5 and 5 'are arranged one above the other. For clamping a Mischgutbehälters (not shown here) between the two turntables 5 and 5 ', a door 8 of the mixer housing 3 is opened, so that the lower turntable 5 'on the clamping jaw 6' by means of a Pull-out device 29 is arranged displaceably, from the mixer housing 3 can be partially pulled out, so that the mix container on the turntable 5 'can be easily placed. After pushing back of the turntable 5 'in its illustrated in Fig. 1 starting position in which the Turntable 5 'is located directly below the turntable 5, the two turntable 5 and 5 'by means of a spindle drive 9 so towards each other moves the mixing container between the two turntables 5 and 5 ' is clamped. The two turntables 5 and 5 'or the respective associated clamping jaws 6 and 6 'slidably on the guide columns. 7 arranged that by a displacement of the clamping jaws 6 and 6 'means of the spindle drive 9 in each case the same travel for the turntable 5 and 5 ' is covered.

The clamping frame 4 is connected to a stationary bearing part 10 on the support frame. 2 fastened, wherein another bearing part 11 in a longitudinal center region of the designed as a U-base guide columns 7 for rotating the clamping frame 4 is arranged about a horizontal clamping frame pivot axis 12. A motor drive 13 is arranged in the mixer housing 3, wherein by means of a Belt drive 14 a corresponding rotational movement of the motor drive 13th can be transferred to the clamping frame 4, so that the clamping frame. 4 be placed around the clamping frame rotation axis 12 in a rotary motion can.

At this tension frame rotation is by means of a gear 15 a turntable drive coupled for the turntable 5. Since the two turntables 5 and 5 ' coaxially about a turntable axis 16 are rotatable, the rotational movement from the rotary-driven turntable 5 through the between the two turntables 5 and 5 'clamped Mischgutbehälter (not shown) on the Turntable 5 ', which is freely rotatably mounted on the clamping jaw 6', transmitted. The transmission 15 for transmitting the clamping frame rotation on the turntable 5 has the fixed bearing part 10, a stationary pulley 17, the coaxial to the clamping frame pivot axis 12, on. In the basic position of the Biaxialmischers 1, which is shown in Fig. 1, is at the upper end of Guiding columns 7 a yoke 18 arranged by means of which the two spaced arranged guide pillars 7 are connected (see. also Fig. 2). At yoke member 18 are two spaced Riemenumlenkscheiben 19 with coaxial, perpendicular to the clamping direction and the clamping frame axis of rotation 12 horizontal axes of rotation arranged. In addition, the yoke part 18 a Drive pulley 20 is arranged, wherein for driving a first drive belt 21, which has a circular diameter around the fixed Pulley 17, the two Riemenumlenkscheiben 19 and the drive pulley 20 is looped. The axis of rotation of the drive pulley 20 is perpendicular to the axis of rotation of Riemenumlenkscheiben 19 approximately aligned parallel to the guide columns 7. There is also one axially parallel to the guide columns 7 extending turntable drive shaft 22nd provided, at the end of the drive pulley 20 is connected. Both on the turntable axis 16 of the turntable 5 and on the turntable drive shaft 22 are each a pulley 23 and 24 are provided wherein for transmitting the rotational movement of the turntable drive shaft 22nd or the pulley 24 on the turntable 5 and the pulley 23rd a second drive belt 25, the two pulleys 23 and 24 for a rotary drive connects, is provided. The second drive belt 25 can be designed as a toothed belt. Since the jaws 6 together with the turntable 5 when clamping a Mischgutbehälters opposite the guide columns 7 can be moved longitudinally, is the pulley 24 along the turntable drive shaft 22 also longitudinally displaceable, so that even with a corresponding clamping of the Mischgutbehälters and an associated displacement of the clamping jaw 6 of the rotary drive is ensured functionally safe for the turntable 5.

For adjustment according to the invention of the dynamic unbalance on the clamping frame 4 by an associated mass distribution is rotationally driven Turntable 5 a coaxial mounted clamping jaws fixed balance weight 26 arranged. The freely rotatable without mixing container Turntable 5 'is on the associated clamping jaws 6' a balancing weight 27th assigned to the turntable rotation axis 16 as a turntable axis closer to a tenter bearing point 28, which by the connection of the stationary bearing part 10 is defined with the support frame 2, is attached.

If a mixed material container between the two turntables 5 and 5 'is clamped, so is due to the rotational movement of the clamping frame 4 to the clamping frame rotation axis 12 and thus coupled rotational movement of the turntable 5 and 5' about the turntable axis 16 mixing of located in the mix container Mischguts, such as pasty ink, achieved. By passing through the counterweight pulley 26 and the counterweight 27 generated dynamic unbalance on the clamping frame 4 is counteracted a gyro moment _gyro M, so that it is balanced or in its effect on the clamping frame 4 is at least reduced.

FIG. 2 schematically shows a front view of the biaxial mixer 1, wherein the mixer housing 3 together with the support frame 2 and the motor drive 13 is omitted. It can be seen that the two Guide pillars 7 spaced from each other running parallel and the U-base the clamping frame 4 are arranged forming. Again, the basic position of the biaxial mixer 1, in which the two guide columns 7 vertically are aligned and the rotationally driven turntable 5 is located at the top, shown. The freely rotatable without mixing container lower turntable 5 'is on the extension device 29 arranged so that the above-described Displacement of the turntable 5 'to set up the mixed goods container is possible. At the yoke 18, the drive pulley 20 can be seen. Above the turntable 5, the associated pulley 23 is arranged, the by means of the second drive belt 25 with the pulley 24, here is covered by the pulley 23, for the rotary drive of the turntable. 5 connected is.

In Fig. 3 is a schematic perspective view of the biaxial mixer is shown. Here, in particular, the gear 15, by means of which the clamping frame rotation is transmitted to the turntable 5, to recognize. The first drive belt 21 is the stationary pulley 17, the two Riemenumlenkscheiben 19 and the drive pulley 20 looped so that at a rotation of the clamping frame 4, by the motor drive 13, the here is not shown, the drive pulley 20 is also in a rotational movement is offset. This rotation of the drive pulley 20 is transmitted to the pulley 24 on the turntable drive shaft 22, so that by means of the second drive belt 25, the pulley 23rd the turntable 5 is driven for a corresponding rotation of the turntable 5. Is between the two turntables 5 and 5 'a mix container clamped, so this is by the rotational movement of the turntable 5 to the Turntable axis 16 is rotated and at the same time due to the rotational movement of the Tensioning frame 4 is rotated about the clamping frame pivot axis 12, so that a Mixing of the mixed material in the mix container obtained becomes.

FIG. 4 shows a schematic side view of the biaxial mixer 1, wherein only the guide columns 7 are shown as a U-base and the two clamping jaws 6 and 6 'for the illustration of the clamping frame 4. With a cross of the clamping frame bearing point 28 is located, from which in the direction of the clamping frame rotation axis 12, the X direction and in the direction of the turntable axis of rotation 16, the Z direction are defined. Due to the clamping frame rotation about the clamping frame rotation axis 12, a clamping jaw moment M _{Dyn, 1} and on the clamping jaw 6 ', a clamping jaw moment M _{Dyn, 2} occurs on the clamping jaw 6. By the turntable rotation of the turntable 5 and 5 'about the turntable axis 16, the gyro momentum M _{gyroscope is} caused. The mass distribution on the clamping frame 4 is designed so that the relative to the clamping frame pivot axis 12 acting as a two-sided lever clamping frame 4 is statically balanced and the radial with respect to the clamping frame rotation axis 12 and caused by the clamping frame speed centrifugal force F _{Flieh, 1} on the clamping jaws. 6 and the centrifugal force F _{Flieh, 2} on the clamping jaws 6 'are the same size, so that the vectorial sum of the two centrifugal forces F _{Flieh, 1} and F _{Flieh, 2} gives zero. With a circular symbol are in the two jaws 6 and 6 ', the center of gravity 30 and 30' of the two jaws 6 and 6 ', where the two centrifugal forces F _{Flieh, 1} and F _{Flieh, 2} attack, located. With the distances x ₁ and x ₂ , the respective distance of the centers of gravity of the clamping jaws 6 and 6 'from the clamping frame bearing point 28 in the direction of the clamping frame axis of rotation 12 located, with z ₁ and z _2, the distance of the centers of gravity of the clamping jaws 6 and 6 'is perpendicular to the clamping frame rotation axis 12, this distance is the same size (z ₁ = z ₂ ). Due to the arrangement of the balance weight plate 26 and the balance weight 27, both of which are shown only schematically in Fig. 4 with a square block, the desired dynamic unbalance on the clamping frame 4 is generated so that the vectorial sum of the clamping jaw moment M _{Dyn, 1} and of the jaw torque M _{Dyn, 2} with the gyro moment M _gyro becomes zero. In this ideal case of spurious at high speeds the influence of centrifugal torque M _gyro is completely balanced. In addition, with ω _D, the angular velocity of the turntable 5 and 5 'around the turntable axis of rotation 16 and with ω _S, the angular velocity of the clamping frame 4 to the clamping frame rotation axis 12 located.

Claims (10)

Biaxial mixer, in particular for mixing a mixture with high Mischgutvisiskosität, such as pasty printing ink, with a U-shaped clamping frame, with co-rotating against each other turntables on the formed as clamping jaws U-legs, between which a Mischgutbehälter is clamped, wherein the clamping frame is rotatably driven about a vertically and centrally to the U-base and parallel to the U-legs clamping frame rotation axis with a certain clamping frame speed, so that with respect to the clamping frame bearing on the jaws each jaw torque occurs, and at least one turntable and thus the clamped container for mixing material is rotationally driven about a turntable axis lying perpendicular to the clamping frame axis of rotation with a specific turntable rotational speed, wherein a rotary moment occurs in addition to the clamping jaw moments on the clamping frame, characterized in that on the clamping frame (4) a dynamic imbalance by an associated mass distribution (26; 27) is generated, which counteracts the _gyroscopic moment (M _gyroscope ) and this compensates in its effect on the clamping frame (4) or at least reduced. Biaxial mixer according to claim 1, characterized in that the mass distribution (26; 27) on the clamping frame (4) is designed such that the sum of the clamping jaw torque (M _{Dyn, 1} ) of the one clamping jaw and the clamping jaw moment (M _{Dyn, 2} ) of the second jaw corresponds to the gyro moment (M _gyro ), so that M Dyn, 1 + M Dyn, 2 + M roundabout = 0 is. Biaxial mixer according to claim 2, characterized in that the mass distribution (26; 27) on the clamping frame (4) is designed so that with respect to the clamping frame rotation axis (12) acting as a two-sided lever clamping frame (4) is statically balanced and the radial with respect the clamping frame rotation axis (12) and caused by the clamping frame speed centrifugal force (F _{Flieh, 1} ) on a clamping jaw (6) and the centrifugal force (F _{Flieh, 2} ) on the second jaw (6 ') are the same size, so that the vectorial sum F Fly, 1 + F Fly, 2 = 0 is. Biaxial mixer according to one of claims 1 to 3, characterized in that a clamping device is provided, preferably a spindle drive (9), with which the clamping jaws (6, 6 ') to a symmetrical clamping operation by respectively equal clamping paths with respect to the clamping frame rotation axis (12 ) are displaceable on at least one guide column (7), wherein in each case the vertical distance of the centers of gravity (30, 30 ') of the two clamping jaws (6, 6') of the clamping frame rotation axis (12) is equal. Biaxial mixer according to one of claims 1 to 4, characterized in that the tenter frame speed is optionally controllable in a range from 0 to 1000 U / min, preferably from 300 to 700 U / min, and
that the turntable speed or the associated turntable angular velocity ω _{D is selected} in a range of 0.5 to 2 times compared to the tenter frame speed, or the associated tenter frame angular velocity ω _S , so that the moments result as follows : M Dyn, 1 = x 1 · Z 1 · Ω S 2 · M 1 M Dyn, 2 = x 2 · Z 2 · Ω S 2 · M 2 With

x ₁ , x ₂

Distance of the centers of gravity (30, 30 ') of the clamping jaws (6, 6') from the clamping frame bearing point (28) in the direction of the clamping frame pivot axis (12)

z ₁ , z ₂

Distance of the centers of mass (30, 30 ') of the clamping jaws (6, 6') perpendicular to the clamping frame axis of rotation (12)

ω _D

Angular speed of the turntables (5, 5 ') about the turntable axis of rotation (16)

ω _S

Angular velocity of the clamping frame (4) about the clamping frame axis of rotation (12)

m ₁ , m ₂

respective masses of the clamping jaws (6, 6 ')

and M roundabout = -ω D · Ω S (I Const. + I vessel ) With

I _Konst.

constant, design-related proportion of the mass moment of inertia

I _vessel

Mass moment of inertia of the respective vessel with mix

such as
ω _D = 0.5 to 2 times ω _S. Biaxial mixer according to one of Claims 1 to 5, characterized in that the mass distribution required for the dynamic unbalance is achieved as far as necessary by attaching balance weights (26, 27) to the clamping jaws (6, 6 '). Biaxial mixer according to one of claims 1 to 6, characterized in that the jaw adjustment controlled for clamping a Mischgutbehälters motorized and the travel is detected to determine the respective vessel height, preferably by the number of spindle rotations in a Spindelverstellantrieb (9), and
that the clamping frame (4) is driven at a lower rotational speed compared to larger determined vessel heights at smaller determined vessel heights. Biaxial mixer according to one of claims 1 to 7, characterized in that a support frame (2) is mounted in a mixer housing (3),
in the U-shaped clamping frame (4), the U-base as at least one guide column (7) lies in a vertical plane and the U-legs are held displaceably as clamping jaws (6, 6 ') on the guide column (7) and via a spindle drive ( 9) are each displaceable with the same travel,
with a clamping frame bearing with a fixed bearing part (10) on the supporting frame (2) and the other bearing part (11) in a longitudinal center region of the at least one guide column arrangement for rotating the clamping frame (4) about a horizontal clamping frame pivot axis (12),
a motor drive (13) is provided for the clamping frame (4) and the turntable drive for a turntable (5) is coupled to the clamping frame rotation by means of a gear mechanism (15).
a fixed belt pulley (17) is mounted coaxially to the clamping frame pivot axis (12) on the bearing part (10) on the clamping frame (4),
that two spaced guide columns (7) are used, which are connected on one end side by a yoke member (18) on which both two spaced Riemenumlenkscheiben (19) with coaxial, perpendicular to the clamping direction and the clamping frame pivot axis (12) lying axes of rotation and a Drive pulley (20) are arranged,
in that the drive belt pulley (20) is connected at the end to a turntable drive shaft (22) which is axially parallel to the guide pillars (7) and drives a first drive belt (21), preferably of circular diameter, around the stationary pulley (17), belt pulleys ( 19) and the drive pulley (20) is wound, and
a pulley (23; 24) for a second drive belt (25) for transmitting the rotational movement of the turntable drive shaft (22) to the turntable (5) on the turntable axis (16) and during a clamping operation longitudinally displaceable and rotationally transmitting on the turntable drive shaft (22) ) are mounted. Biaxial mixer according to one of claims 1 to 8, characterized in that for adjusting the dynamic unbalance a directly rotationally driven turntable (5) is associated with a coaxially mounted clamping jaws fixed balance weight plate (26), and
that the other freely rotatable turntable (5 ') is mounted on a slide-out device (29) and a balance weight (27) on the associated clamping jaw part (6') offset to the turntable axis of rotation (16) closer to the clamping frame bearing point (28) is mounted. Biaxial mixer according to one of claims 1 to 9, characterized in that with a housing part and / or support frame part of the biaxial mixer, an acceleration sensor is connected, and
when an adjusted acceleration limit value is exceeded, an emergency stop function is activated and the rotary drive is switched off and braked.

Images