DE102017105342A1 - Device for the controlled supply of grit and method for operating such a device - Google Patents

Abstract

The present invention relates to a device for the controlled supply of grit (5), preferably to a spreading head of a scattering system in the course of the production of material plates, consisting of a Streudosierbunker (1) and a filling device (2), and a method for operating such a device , Which is characterized in that the drive (25) of the filling device (2) comprises a system for electronic position, speed and / or torque control of its drive shaft (254), as the control variables for the movement of the filling head (24) through the Drive (25) uses data generated in the control unit (3) for the coordination of a planned and desired filling (SMW) and an actual filling (IMW) of the scattering bunker (1). This advantageously allows the control of both the speed and the amplitude of the pivoting movement of the filling device (2) as a function of the current operating position taking into account something User requests during operation and thus not only controlled, but also scheduled, i. adapted to the current operating situation and / or user requests, supply of grit (5) in a Streudosierbunker (1).

Description

The present invention relates to a device for the controlled supply of grit, in particular to a scattering head of a scattering system in the course of the production of material plates, according to the preamble of claim 1, and a method for operating such a device according to the preamble of claim 11.

For the production of material plates from free-flowing material, hereinafter referred to as a grit, a mixture of particles or fibrous materials and a binder is scattered by means of a scattering head to a grit on a forming or conveyor belt, the grit then a possibly necessary pre-treatment and finally a Compression is supplied.

In general, this scattering systems are used in which the production and pretreatment, respectively the gluing, and the quality control of the grit, the supply of grit to a Streudosierbunker and finally the discharge into a scattering head fully automated, the grit comparatively long distances means Conveyor belts, scratches and / or screw conveyors must be transported.

During this transport route within the scattering system must always be ensured that no loss of quality of the grit, for example by particle separation, occurs.

In particular, the supply of the grit to the scattering head of a scattering system should be controlled as possible, since even comparatively small inhomogeneities in the spreading material distribution, longitudinally and transversely to the material flow direction, can have a negative effect on the subsequent spreading inaccuracy.

It is common practice to provide a Streudosierbunker for controlled, homogeneous as possible supply of the grit to the scattering head of a scattering system.

The Streudosierbunker itself is in turn filled via a device with grit, which is usually narrower than the Streudosierbunker to be filled. Thus, there is a need to evenly expand the material flow.

Nevertheless, in order to be able to fill the full width of the scattering dosing hopper as homogeneously as possible with spreading material, devices for feeding grit bunkers with movable discharge devices for the spreading material are known from the prior art.

From the DE 22 23 779 B2 For example, an arrangement for depositing chips into an elongated intermediate bunker in the course of the production of chipboard and the like is known, in which the spreading material is transported by means of a screw conveyor to a discharge head which can be moved periodically along the longitudinal axis of the intermediate bunker as well as transversely thereto ,

The DE 31 42 871 A1 also discloses an arrangement for dispensing chips mixed in a gluing station with a thermosetting binder into an elongated chip bunker in the course of the manufacture of chipboard and the like, in which a discharge head is formed in the shell of a lower screw conveyor and displaceable in the longitudinal direction of this screw conveyor ,

And finally is out of the DE 34 04 965 A1 a device for feeding the grit hopper of a spreader in the course of the production of particleboard, fiberboard and the like is known, in which the transport of the grit takes place by means of a conveyor belt and a discharge lug with the aid of a sliding carriage in the discharge direction back and forth and also transverse to it.

Although such devices allow the supply of grit over the entire width of the scattering metering bunker, in particular over the entire width of a circulating in the ground near conveyor belt. However, the filling of the scattering dosing bunker achieved by it can have inhomogeneities in the edge regions of the conveyor belt, in particular a deviation of the filling level of the right from the left side. Common, designed as a swivel band, filling devices usually provide fixed brake and stop switch on both sides of a performed by the filling pivoting movement. When passing the brake switch, a braking operation is initiated to stop the filling until reaching the stop switch and then reverse the direction of movement. This process is always carried out in the prior art with a once predetermined, independent of the current operating situation Braking ramp, whereby during the braking and reversing process, the bottom band of the scattering bins continues to run at unabated speed. This results in adversely short-term bulk density increases at the edges of the bottom belt, respectively in the reverse area. The speed of the pivoting movement of the filling device can also be adjusted in such systems only by manually converting the brake and stop switch to varying material flow rates or user preferences, such as different bulk profiles (targeted deviations in the dump height of the left and right edge) or a variation of the bulk width , which requires time-consuming assembly work on the system and thus inevitably a production interruption. On the other hand, the speed of the pivoting movement of the known filling device must be limited to a maximum pivoting speed of usually 400 mm / s for a braking ramp engaging on the brake and stop switch.

On this basis, the present invention seeks to provide a comparison with the prior art improved apparatus for the controlled supply of grit to a scattering head of a scattering system and a method for operating such a system, which - especially when increased to 650 mm / s Pivoting speeds of a filling device - a scheduled, ie adapted to the current operating situation and / or user requests, supply of grit in a Streudosierbunker allowed. The aforementioned maximum speed will preferably be used at eight feet of equipment. However, this is not to be interpreted as limiting, since according to the initial width of the material to be spread (material supply) and the discharge width for the material to be spread (material output), the optimum speed must be selected.

This object is achieved by a device for the controlled supply of grit, in particular to a scattering head of a scattering system in the course of the production of material plates, with the features of claim 1 and by a method for operating such a device having the features of claim 11.

• - wobei der Streudosierbunker
  • - zumindest eine Austragseinheit zum Austragen von Streugut, bevorzugt an einen Streukopf,
  • - einen Boden,
  • - ein in Bodennähe endlos umlaufendes Bodenband zum planmäßigen Transport von im quer zur Laufrichtung des Bodenbandes angeordneten und sich über die Breite des Bodenbandes erstreckenden Materialzuführbereich zugeführten Streugut zur Austragseinheit,
  • - und zur Steuerung von Transport, Eintrag und Austrag von Streugut eine Steuereinheit umfasst;
• - und wobei die Befüllvorrichtung
  • - einen Füllkopf umfasst, welcher im Materialzuführbereich beweglich geführt ist,
  • - und die Bewegung des Füllkopfes durch wenigstens einen Antrieb bewirkt ist.

The invention is genus-forming of a device for the controlled supply of grit, in particular to a scattering head of a scattering system in the course of the production of material plates, consisting of a Streudosierbunker and a filling device, which supplies the scattering metering bin scattering material over a Materialzuführbereich,

• - The litter dosing bunker
  • at least one discharge unit for discharging spreading material, preferably to a spreading head,
  • - a floor,
  • a ground belt which endlessly revolves near the ground for the scheduled transport of spreading material to the discharge unit arranged in the material feed region which is arranged transversely to the running direction of the bottom belt and extends over the width of the bottom belt,
  • - And for controlling transport, entry and discharge of grit a control unit comprises;
• - And wherein the filling device
  • comprises a filling head which is movably guided in the material feed area,
  • - And the movement of the filling head is effected by at least one drive.

The inventive device for the controlled supply of grit to a scattering head of a scattering system, builds on generic devices now characterized in that the drive comprises a system for electronic position, speed and / or torque control of its drive shaft, as controlled variables for the movement of the filling head used by the drive data that are generated in the control unit for the coordination of a scheduled and an actual filling of the scattering bunker.

The drive according to the invention for the movement of the filling head of the filling advantageously not only allows a controlled, but also due to the electronic position, speed and / or torque control of its drive shaft beyond a scheduled, i. to the current operating position and / or user requests coordinated, supply of grit into a Streudosierbunker, even with increased pivoting speeds of the filling.

Advantageous embodiments and developments, which are used individually or in combination with each other, are the subject of the dependent claims.

In a preferred embodiment of the invention, the drive for the movement of the filling head may comprise a motor, a frequency converter and a rotary encoder. The use of frequency converters as adjusting elements for the drive motors advantageously allows variable speeds of movement of the filling head of the filling device between 0 and 650 mm / s. These variable speeds can be even greater depending on the need. Advantageously, the measured by the rotary encoder (commonly referred to as encoder) IST counts for the rotation angle of the drive axle or its change, which are processed by rapid counter modules in the control unit, for detecting the angular position of the drive shaft and thus implicitly for determining the position of the filling head Filling device within the pivoting curve.

Cumulatively or as, in particular higher-quality, alternative, in a further embodiment, a drive for the movement of the filling head as a servo motor may be formed, which advantageously allows a more accurate position determination and control.

In a preferred embodiment according to the invention, advantageously at least two reference switches for calibrating and / or adjusting the position of the filling head of the filling device can be arranged in the material feed region of the scattering dosing bunker. The reference switches can be used in particular for referencing the movement, that is to say the travel path of the filling head of the filling device. They are inventively preferred only for calibration at the beginning or for adjustment after restart as reference points, in particular for referencing the end positions of the movement of the filling head, which follows, for example, a pivoting curve is needed. For this purpose, the reference switches can preferably each approached once and stored by the control unit as absolute end positions.

In a further preferred embodiment, it has proven useful for the filling head of the filling device to pass through a pivoting curve with a first and a second reversal point during its movement, and for two reference switches to be spaced from the reversal points, preferably symmetrically to a center point of the pivoting curve calculated with respect to the reversal points , are arranged. During operation, it is then advantageous, depending on this reference switch, to define any point as the reversal point of the filling head of the filling device. If, for example, a spread on the bottom belt in the hopper bunker can be varied, this is now possible without time-consuming assembly work on the hardware, in particular without manual conversion of the reference switch.

In addition, in a further preferred embodiment, it has been proven that in the material feed area of the scattering dosing bunker, a center reference switch is arranged at the center or defined at a distance from the center of a continuous movement of the filling head as a pivoting curve. A central reference switch, for example an induction switch, arranged at the center or defined at a distance from the center of a pivoting curve can advantageously be used for readjusting the actual count of the rotary encoder. If, in fact, a wheel, in particular a rubber wheel, is used for the movable mounting of the filling head of the filling device, then the counting value of the rotary encoder can change over time due to slippage on the travel drive. In combination with at least one reference switch, by providing a center reference switch, the presence of a deviation from actual count to nominal count can be advantageously controlled and, if necessary, computationally corrected on each pass of the swing curve, with the count difference between the left and right end positions then being 0 - 100% of the route can be scaled.

In a further preferred embodiment of the invention, the Streudosierbunker at least one, preferably two, comprise means for level measurement, which are arranged below and at two on both sides of the bottom belt, based on the speed / transport direction of the bottom belt as right and left level meter in Streudosierbunker. The means for level measurement arranged in the scattering dosing bunker, preferably on both sides of the floor belt according to the invention, make it possible to control the homogeneity of a filling, that is to say the distribution of the spreading material on the floor belt.

It has further proven that the means for level measurement, for example, as arranged below the bottom belt scales for weighing the grit located on the bottom belt is formed. Alternatively or cumulatively, a fill level measurement with electromagnetic radiation, preferably via laser radiation and a corresponding optical sensor for detecting the electromagnetic radiation, may be formed.

Finally, an embodiment according to the invention is preferred, in which the control unit further control and / or regulation data with means for level measurement, with reference switches, the drive the filling device, the drive of the bottom belt and / or the discharge unit exchanged. The inclusion of further control and / or control data improves the scheduled supply of grit. In particular, with the help of the control unit in the event of discrepancies between the desired distribution and the distribution of the material to be spread on the bottom strip as detected by level measurement, the speed of the filling device can be further varied until the desired distributions of the material to be spread are reached again. For example, in the marginal zones of the bottom band, the lack of spreading material can be replaced by a reduction in the speed of the pivoting movement of the filling head of the filling device as it approaches the reversal points and the bottom belt remains at the same speed.

The invention further relates to a method for operating a device as described above.

In contrast to generic operating methods, a method for operating a device according to the invention is characterized in that the movement of a filling head of the filling device by at least one, a system for electronic position, speed and / or torque control of its drive shaft comprising drive in response to a filling state of Streudosierbunkers is controlled by using control variables, which are generated in a control unit for coordinating a planned SET and an actual filling of the scattering bunker.

In a preferred method step, the filling head of the filling device moves according to the invention preferably at least two reference switches in a Materialzuführbereich the Streudosierbunkers and stores these positions in a control unit, which uses them for the ongoing operation of a pivoting movement as reference data. This advantageously allows the controlled supply of grit in a Streudosierbunker depending on the current operating position and taking into account any user requests during operation.

In a further preferred method step, reference data in combination with a desired value user input and / or actual measured values of a means for filling level measurement, desired counts for reversal points and / or acceleration, speed and / or braking profiles of the desired pivoting movement of the filling head calculated by the drive. This advantageously improves the regulation of the filling device as a function of a predetermined throughput and / or the filling state of the scattering dosing bunker. Thereby, the scheduled supply of grit is made possible at a higher swing speed by dynamic calculation of the initiation of the change of direction at the reversal points and the variation and / or correction of the pivoting movement of the filling.

With a nominal value user input for reversal points, it is also possible to adjust the production width without switching from hardware switches. This also allows for the automatic conversion, by transferring the new production width of a parent production computer, an automatic conversion of the filling of the scattering bunker.

Particularly preferably, the pivoting movement of the filling head can be set at a speed of up to 650 mm / s. The previously known slippage in mass systems that are running too fast or slippage that sets in after corresponding wear of the rollers and drive systems can be corrected without difficulty.

Particular preference is sought that a period of the pivoting movement of less than 10 s is set.

In a further preferred method step, during the pivoting movement of the filling head when passing a middle reference point, the actual count values are compared with the calculated nominal count values and corrected by computation in case of deviations. In particular, different spreading widths and scattering profiles of the material to be spread on the floor belt can be realized without time-consuming assembly work, in particular the manual conversion of the reference switch, hindering the operating procedure.

The method is finally distinguished by a variable selectability of the pivoting speed of the filling device.

The inventive device for the controlled supply of grit and the method for operating such a device advantageously allow the control of both the speed and the amplitude of the pivoting movement of a filling device, depending on the current Operating situation and taking into account any user wishes, during operation. Time-consuming, a production stop or interruption requiring, assembly work is thereby avoided and due to the possibility provided to calculate the braking ramp of the pivoting movement of a filling device with respect to any lying within a Materialzuführbereich reversal points now and to be able to control correspondingly higher speeds of the filling device allows. This allows not only a controlled, but also a scheduled, ie on the current operating situation and / or user needs tuned,
Supply of grit into a Streudosierbunker, even at working with significantly increased swing speeds filling.

With the DE 10 2008 030 417 A1 is a chipboard and a method for producing a chipboard has become known, which is particularly characterized in that different densities are arranged locally or preferably in tracks longitudinally and / or transversely in a spreading material mat to be pressed.

Accordingly, according to the invention, it can also be provided to set or provoke predetermined density increases or undershoots in the scattering dosing bunker via the controllable pivoting speed. These density increases will preferably be reflected as longitudinal strips in the corresponding spreading material mat and, as a result, result in corresponding plates with density differences after the pressing. The overshoot or undershoot of the density can in particular also serve in the corresponding tracks / strips to reduce the necessary removal or supply of grit on a scattered mat and to move less material in the circulation.

For this purpose, it is in particular proposed that the device or the method performs a predetermined, preferably sinusoidal, course of velocity over the width of the scattering dosing bunker. In an adaptive embodiment in this context, the swivel device or the drive could also provide braking means for speed reduction of the pivoting movement.

Further advantages and embodiments of the present invention will be described below with reference to preferred embodiments, as well as in conjunction with the drawings.

• 1 eine Ausgestaltung einer Vorrichtung zur kontrollierten Zuführung von Streugut zu einem Streukopf einer Streuanlage, bestehend aus einem Streudosierbunker und einer Befüllvorrichtung in einer Seitenansicht;
• 2a die in 1 gezeigte Vorrichtung in einer Draufsicht, wobei sich die Befüllvorrichtung in einer mittleren Position innerhalb einer Schwenkkurve befindet;
• 2b die in 1 gezeigte Vorrichtung in einer Draufsicht, wobei sich die Befüllvorrichtung in einer seitlich ausgelenkten Position innerhalb einer Schwenkkurve befindet;
• 3a in einer Vorderansicht einen vergrößerten Ausschnitt der Vorrichtung aus 2a mit einem Füllkopf der Befüllvorrichtung in einem Materialzuführbereich;
• 3b in einer Vorderansicht einen vergrößerten Ausschnitt der Vorrichtung aus 2b mit einem Füllkopf der Befüllvorrichtung in einem Materialzuführbereich; und
• 4 eine beispielhafte schematische Darstellung für einen Regelkreis eines erfindungsgemäßen Verfahrens.

In it show schematically:

• 1 an embodiment of a device for the controlled supply of grit to a scattering head of a scattering system, consisting of a Streudosierbunker and a filling in a side view;
• 2a in the 1 a device shown in a plan view, wherein the filling device is in a middle position within a pivoting curve;
• 2 B in the 1 shown device in a plan view, wherein the filling device is in a laterally deflected position within a pivoting curve;
• 3a in a front view of an enlarged section of the device 2a with a filling head of the filling device in a material feed area;
• 3b in a front view of an enlarged section of the device 2 B with a filling head of the filling device in a material feed area; and
• 4 an exemplary schematic representation of a control loop of a method according to the invention.

In the following description of preferred embodiments of the present invention, like reference characters designate like or similar components.

1 shows a side view of an embodiment of a device for the controlled supply of grit 5 to a spreading head of a scattering plant, consisting of a Streudosierbunker 1 and a filling device 2 ; which the Streudosierbunker 1 grit 5 via a, for example, the top side of the scattering bunker 1 formed, Materialzuführbereich 11 supplies. The spreading dosing bunker 1 preferably comprises at least one, for example at a transverse 16 or bottom 17 arranged, discharge unit 14 for the discharge of grit 5 to the scattering head, a floor 122 and a near the ground, for example, between two longitudinal walls 13 of the scattering bunker 1 , endless revolving bottom band 12 , in particular with a controllable drive 121 , for scheduled transport of the material supplied in the material supply 11 grit 5 to the discharge unit 14 ,

In this embodiment, the Streudosierbunker includes 1 two means of level measurement 15, related to the speed of the bottom band 12 as right and left level gauge ( 151 . 152 ) in the hopper bunker 1 are arranged, which are preferably components of a basis weight balance 123 that are within the orbit of the bottom band 12 is positioned.

Alternatively, the means for level measurement 15 also with two optically spaced level meters 151 ' and 152 ' done on the transverse wall 16 of the scattering bunker 1 are mounted and its level by distance measurement left and right, based on the speed of the bottom belt 12 , to the rear transverse wall 16 to capture.

The material feed area 11 is, as shown, preferably transversely to the direction of the bottom belt 12 arranged and extends advantageously over the width of the bottom band 12. In a further embodiment of the invention, the longitudinal walls 13 of the scattering metering bunker 1 be designed to be variable in their distance from each other, whereby the width of the scattering metering bunker 1 becomes variable. For controlling transport and discharge of grit 5 includes the spreading dosing bunker 1 preferably a control unit 3 ,

In 1 is also shown that the filling device 2 is preferably mounted on a rotation axis 23 and a filling head 24 carries, which is movably guided in the Materialzuführbereich 11, in particular with respect to the Materialzuführbereiches 11 is movably mounted, and the grit 5 the spreading dosing bunker 1 transverse to the speed, that is the running direction, of the bottom band 12 supplies. This is the movement of the filling head 24 by at least one drive 25 causes.

The 2a and b show the in 1 shown device in a plan view, wherein the filling device 2 in a middle position within a pivoting curve ( 2a ), or in a laterally deflected position within a pivoting curve ( 2 B ) is located. You can see that in the material feed area 11 of the scattering bunker 1 preferably at least two reference switches 111 ; 112 , as well as a middle reference switch 113 , as shown here at the midpoint MP, or defined at a distance from the center point MP, of a movement of the filling head through which the pivoting curve passes 24 for calibrating and / or adjusting the position of the filling head 24 the filling device 2 can be arranged. The filling head 24 the filling device 2 preferably traverses in its movement a pivoting curve with a first U1 and a second U2 reversal point, wherein the two reference switches 111 ; 112 to the reversal points U1; U2 defined spaced, preferably symmetrical to one, with respect to the reversal points U1; U2 calculated center MP of the pivoting curve, are arranged. The drive 25 for the movement of the filling head 24 advantageously comprises a motor as shown 251 , a frequency converter 252 and a rotary encoder 253, alternatively or cumulatively, the drive 25 be designed for the movement of the filling head 24 as a servo motor.

In the 3a and 3b is an enlarged section of the device of the 2a and 2 B in a front view with a filling head 24 the filling device 2 shown in a Materialzuführbereich 11. In the embodiment shown here, which is preferred according to the invention, the spreading-dosing bunker comprises 1 two means for level measurement 15, which preferably on both sides within the circulation of the bottom belt 12, based on the speed of the bottom belt 12 as the right 151 and left 152 level meter in the hopper bunker 1 , are arranged. In this case, the means for level measurement 15 as arranged within the circulation of the bottom belt 12 scales 123 for weighing the on the floor tape 12 located grit 5 and / or as optical means for the payment and detection of electromagnetic radiation, in particular of laser radiation.

It can also be seen that for the movable guidance of the filling head 24 the filling device 2 in Materialzuführbereich 11 at least one, preferably two wheels 26 , In particular rubber wheels, can be used, which advantageously an additional storage of the filling head 24 in the material guide area 11 next to the rotation axis 23 provide. In the 3a and 3b is also the control unit 3 shown, which according to the invention preferably further control and / or regulation data with a means for level measurement 15 , with reference switches 111 ; 112 ; 113 , the drive 25 the filling device, the drive 121 of the bottom band 12 and / or the dispensing unit 14 can exchange.

Finally shows 4 an exemplary schematic representation of a control loop of a method for operating a device according to the invention. In the method, the movement of a filling head 24 the filling device 2 by at least one, a system for electronic position, speed and / or torque control of its drive shaft 254 comprehensive, drive 25 depending on a filling state of the scattering bunker 1 using controlled variables, which in one control unit 3 for the coordination of a planned SOLL-SMW and an IST-filling IMW of the hopper bunker 1 , generated, regulated.

In a first step, the filling head 24 the filling device 2 According to the invention preferably at least two reference switches 111 ; 112 in a material feed area 11 of the scattering bunker 1 approach, stores these positions in a control unit 3 which it uses for the current operation of a pivoting motion as reference data. From this reference data can then, in combination with a desired value user input SMW and / or actual measured values IMW of a means for level measurement 15 , SOLL count values SZW for reversal points U1; U2 and / or acceleration, speed and / or braking profiles of the desired pivoting movement of the filling head 24 through the drive 25 be calculated. Finally, during the pivoting movement of the filling head 24 when passing a middle reference point 113 the actual count values IZW are compared with the calculated target count values SZW and corrected in the event of deviations.

The present invention relates to a device for the controlled supply of grit 5 to a spreading head of a scattering system, consisting of a Streudosierbunker 1 and a filling device 2 , as well as a method for operating such a device, which is characterized in that the drive 25 the filling device 2, a system for electronic position, speed and / or torque control of its drive shaft 254 includes, as a controlled variable for the movement of the filling head 24 through the drive 25 Data used in the control unit 3 for the coordination of a scheduled target SMW and an actual filling IMW of the scattering bunker 1 , to be generated.

This advantageously makes it possible to control both the speed and the amplitude of the pivoting movement of the filling device 2 depending on the current operating situation taking into account any user requests during operation and thus not only controlled, but also scheduled, ie tailored to the current operating situation and / or user requests, supply of grit 5 in a hopper bunker 1 ,

LIST OF REFERENCE NUMBERS

1 Streudosierbunker 11 material feed 111 Reference switch (right) 112 Reference switch (left) 113 Reference switch (center) 12 floor tape 121 drive 1 22 ground 123 Libra 13 longitudinal wall 14 discharge unit 15 Means for level measurement 151 Level gauge (right, gravimetric) 152 Level gauge (left, gravimetric) 151 ' Level gauge (right, optical) 152 ' Level gauge (left, optical) 16 transverse side 17 bottom 2 filling 21 hopper 22 conveyor belt 23 axis of rotation 24 filling head 25 drive 251 engine 252 frequency converter 253 Rotary encoder (= encoder) 254 drive shaft 26 wheel 3 control unit 5 grit IMW Actual measured value (for example actual filling) SMW TARGET reading (e.g., user input) VIC IST count SZW SOLL count MP Focus U1 first reversal point U2 second reversal point

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2223779 B2 [0009]
• DE 3142871 A1 [0010]
• DE 3404965 A1 [0011]
• DE 102008030417 A1 [0037]

Claims (16)

Apparatus for the controlled supply of grit, in particular to a scattering head of a scattering system in the course of the production of material plates, consisting of a scattering dosing bunker (1) and a filling device (2), which the spreading dosing bunker (1) grit (5) via a Materialzuführbereich (11 ); - wherein the Streudosierbunker (1) - at least one discharge unit (14) for discharging spreading material (5), preferably to a scattering head, - a bottom (122), - near the bottom endlessly revolving bottom band (12) for the scheduled transport of in the transverse arranged to the direction of the bottom belt (12) and over the width of the bottom belt (12) extending Materialzuführbereich (11) supplied grit (5) to the discharge unit (14), - and to control transport, entry and discharge of grit (5) a Control unit (3) comprises; - and wherein the filling device (2) - a filling head (24) which is movably guided in the Materialzuführbereich (11), - and the movement of the filling head (24) by at least one drive (25) is effected; characterized in that - the drive (25) comprises a system for electronic position, speed and / or torque control of its drive shaft (254), which uses data as control variables for the movement of the filling head (24) by the drive (25) which are generated in the control unit (3) for coordinating a planned target value (SMW) and an actual filling (IMW) of the scattering metering bunker (1). Device after Claim 1 , characterized in that the drive (25) for the movement of the filling head (24) comprises a motor (251), a frequency converter (252) and a rotary encoder (253). Device after Claim 1 or 2 , characterized in that a drive (25) for the movement of the filling head (24) is designed as a servo motor. Device according to one of Claims 1 to 3 , characterized in that at least two reference switches (111, 112) for calibrating and / or adjusting the position of the filling head (24) of the filling device (2) are arranged in the material feed area (11) of the scattering dosing bunker (1). Device according to one or more of the preceding claims, characterized in that the filling head (24) of the filling device (2) during its movement through a pivoting curve with a first and a second reversal point (U1, U2), and that two reference switches (111; ) are arranged spaced apart from the reversal points (U1; U2), preferably symmetrically with respect to a center point (MP) of the pivoting curve calculated with respect to the reversal points (U1; U2). Device according to one or more of the preceding claims, characterized in that in the Materialzuführbereich (11) of the Streudosierbunkers (1) a center reference switch (113) at the center (MP) or defined spaced to the center (MP) of a continuous as a swing curve movement of the filling head ( 24) is arranged. Device according to one or more of the preceding claims, characterized in that the scattering dosing bunker (1) at least one, preferably two, means for level measurement (15) which on both sides within the circulation of the bottom belt (12), based on the speed of the bottom belt ( 12) as the right (151, 151 ') and left (152, 152') level meter in Streudosierbunker (1), are arranged. Device according to one or more of the preceding claims, characterized in that the means for level measurement (15), as - within the circulation of the bottom belt (12) arranged balance (123) for weighing the on the bottom belt (12) located grit (5) , and / or - as an optical transmitter / receiver units for electromagnetic radiation, in particular of laser radiation is formed. Device according to one or more of the preceding claims, characterized in that the control unit (3) further control and / or regulation data with a means for level measurement (15), with reference switches (111; 112; 113), the drive (25) the filling device, the drive (121) of the bottom belt (12) and / or the discharge unit (14) exchanged. Device according to one or more of the preceding claims, characterized in that the drive (25) and / or the control unit (3) is suitable for controlling a predetermined, preferably sinusoidal velocity profile of the filling head (24) across the width of the scattering metering bunker (1). Method for operating a device for the controlled supply of grit (5) to a spreading head of a scattering system, according to one or more of the preceding claims, wherein the movement of a filling head (24) of the filling device (2) by at least one, an electronic position system -, speed and / or torque control of its drive shaft (254) comprising, drive (25) in response to a filling state of the scattering dosing bunker (1) using controlled variables which in a control unit (3) for the coordination of a planned target (SMW) and an actual filling (IMW) of the scattering bunker (1) to be generated, is regulated. Method according to Claim 11 in which, in one method step, the filling head (24) of the filling device (2) moves to at least two reference switches (111; 112) in a material feed area (11) of the scattering dosing bunker (1), stores these positions in a control unit (3) and stores them Operation of a pivoting motion used as reference data. Method according to Claim 11 or 12 in which, in a method step, reference data are combined with a desired value user input (SMW) and / or actual measured values (IMW) of a means for filling level measurement (15), target count values (SZW) for reversal points (U1; U2) and / or acceleration, speed and / or braking profiles of the desired pivoting movement of the filling head (24) by the drive (25) are calculated. Method according to one of Claims 11 to 13 in which in a method step during the pivoting movement of the filling head (24) when passing a middle reference point (113) the actual count values (IZW) are compared with the calculated target count values (SZW) and corrected mathematically in case of deviations. Method according to one of Claims 11 to 14 in which a pivoting speed of the filling device (2) is variable between 0 and, preferably at least, 650 mm / s selectable. Method according to one of Claims 11 to 15 in which a predetermined density / filling profile in the scattering dosing bunker is adjusted by a predetermined velocity profile of the pivoting speed of the filling device (2) or of the filling head (24) across the width of the spreading dosing bunker (1).

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