WO2018150041A2 - Control device and control method for metering a binder, incorporation device and incorporation method for incorporating a binder into a material stream, and system for producing material board - Google Patents

Abstract

The present invention relates to a control device (20) for controlling a metering element (22) of a wetting device (24) for metering a binder during the production of material board from dispersible material (14), comprising: a measuring interface (42) for receiving a measured value comprising information for determining the material density of the dispersible material in a material supply (16) of an incorporation device (12) for a wetting device (24); a processor (44) for calculating the material density on the basis of the at least one measured value and for determining a metering value on the basis of the material density; and a control interface (46) for transmitting a control signal to the metering element (22), in order to actuate the metering element (22) to meter the binder according to the determined metering value. The invention also relates to a control method, an incorporation device (12) and an incorporation method for incorporating a binder into a continuous material stream of dispersible material (14) and to a system (10) for producing material board.

Description

 The present invention relates to a control device for controlling a metering element for metering a binder in the manufacture of. The present invention relates to a control device for controlling a metering element for metering a binder in the manufacture of

Material plates of scatterable material, a corresponding control method, a delivery device and a Einbringverfahren for introducing a binder into a continuous material flow scatterable material and a system for producing material plates.

In the manufacture of material slabs from scatterable material, a mixture of particles and / or fibrous matter (eg, wood chips or other lignocellulosic material) and a binder (eg, glue) is scattered to a spreading material mat on a forming or conveyor belt (spreading belt conveyor). This grit mat (also referred to as particle mat) is then after a possibly required pre-treatment of a continuous or

fed to discontinuous compression, which can be done by means of pressure and / or heat. For example, chipboards, MDF (medium-density fiberboard) or Oriented Strand Board (OSB) boards can be produced in this manner.

Before the material is fed to the compression, it is wetted with a binder (gluing). This gluing can be done, for example, in a chute in which the binder is introduced by spraying when falling loosened material. Alternatively, a so-called compulsory mixer can be used in which the particles are mixed together with the binder and possible other agents in a rotating role. After that one can

Caching in a grit storage, which acts as a buffer done. From this buffer, the material is then discharged again, by means of a

Scattering scattered on the press belt and fed to the compression.

State of the art from which the invention is based has become known from EP 2 747 966 B1, WO 2014 079 987 A1 and WO 2014 079 988 A1. An exemplary device for metering binder into a material stream has become known from DE 10 2008 059 877 A1.

When introducing the binder, a balanced dosage of the binder is relevant in several respects. Too low a dosage of the binder can lead to a poorer stability and quality of the material plates. A

 Overdosing can also degrade the board quality, but rather the binder and any other additives to be incorporated are a significant factor in material costs and thus have a direct impact on the board

Production costs.

So far, the dosage of the amount of binder to be introduced usually takes place starting from the dry wood pulp (eg in percent solid resin to mass atro wood). Usually, it is noted in a recipe which dosage is to be selected depending on the material and / or depending on the required / desired properties of the material plates. The dosage of the binder is then

gravi metric.

The theoretically optimal binder dosage depends on the surface of the individual particles of the raw material used (chips, fibers, etc.). Often, however, this material is inhomogeneous and contains particles of different geometries. Due to the different geometries, it may therefore happen that varies at a constant mass to be acted upon by the binder surface of the particles. This in turn means that the chosen from the wood mass starting

Binder dosage may be too high or too low. To ensure a sufficient amount of binder, therefore, an increased binder dosage is often used for safety's sake. This results in a fluctuating quality of

produced material plates as well as higher costs for the binder.

It is an object of the present invention, on the basis thereof, to optimize the metering of the binder in order to enable material plates of high quality with the lowest possible use of binder. In particular, a control device and a control method for driving a metering element for metering a

Bindemittels be created in the production of material plates from scatterable material. According to one aspect, the present invention relates to a solution to this problem

 Control device for controlling a metering element of a

 Wetting device for dosing a binder in the course of the production of material plates from scatterable material, comprising:

 a measuring interface for receiving a measured value with

 Information for determining the material density of the spreadable material in a material feed of a wetting apparatus insertion device;

 a processor for calculating the material density based on the at least one measured value and for determining a dosage value based on the material density; and

 a control interface for transmitting a control signal to the metering element in order to control the metering element for metering the binder in accordance with the determined metering value.

The processor is advantageously not only determined the material density based on the measured values, but also material constants,

Characteristic structures and further information to determine the

Consider material density / bulk density according to its specifications and capabilities.

Another aspect relates to a control method for controlling a metering element for metering a binder in the production of material plates from scatterable material, comprising the steps:

 Receiving a measured value with information to determine the

Material density of the spreadable material in a material feed of a feed device for introducing the binder;

 Calculating the material density based on the at least one measurement and determining a dosage based on the

 Material density; and

Transmitting a control signal to the metering element to control the metering element for metering the binder in accordance with the determined metering value. In a further aspect, the invention relates to a delivery device for

 Introducing a binder into a continuous material stream of spreadable material, comprising:

 a material feed for feeding the spreadable material, wherein the material feed preferably comprises a conveyor belt;

 a measuring element for measuring a measured value with information for determining the material density of the scatterable material in the material feed, wherein the measuring element preferably comprises a displacement sensor for continuously determining a material height of the material and / or a weight sensor for continuously determining weight information;

 a control device as described above; and

 a metering element for metering the binder in response to the control signal, wherein the metering element is preferably designed as a metering pump.

Furthermore, one aspect of the invention relates to a method of introducing a binder into a continuous material flow of spreadable material, comprising the steps of:

 Supplying the spreadable material in a material feed;

 Measuring a measured value with information to determine the

 Material density of the spreadable material in the material feed;

 Performing a control method as described above; and

 Dosing the binder according to the calculated dosing value. In addition, an aspect of the invention relates to a system for the continuous production of material plates, comprising:

 - An insertion device according to claim as described above; and

 - A wetting device for wetting the spreadable material with the binder. According to one aspect, the invention relates to a computer program product with a data carrier, on which program code is stored, which is designed to carry out a method with the steps as described above, when the

Program code is executed. Preferred embodiments of the invention are described in the dependent claims. It is understood that the control device, the control method, the insertion device, the insertion method, the system, and the computer program product may be implemented according to the embodiments described for the control device and the control method in the dependent claims.

The control device according to the invention serves to introduce the quantity of dosing agent introduced by a dosing element into a flow of scatterable material

adjust. In the production of material plates glue is usually used as a binder. The binder is continuously sprayed, for example by means of a nozzle in the flow of material.

Within the scope of the invention it has been found that the consideration of the density of the material to be mixed with binder can be used for a more precise metering of the binder. By material density herein is meant a quantity calculated from detected measurements for the continuously supplied mass per volume of the spreadable material.

In the previous system was usually only the weight of the supplied

Materials considered. The binder to be introduced was metered in accordance with a value specified for a specific weight of the material. This approach is not optimal because the total surface area of the material being fed also depends on the material composition and particle geometry.

According to the invention, however, provided that the dosage of the binder is not determined by the weight, but based on the material density. In contrast to previous approaches, the material density is based on a sensor value

(Measured value) is calculated and then derived from the dosage (Dosierwert) of the binder. On the basis of this dosage, the dosage of the binder, so the amount of binder introduced, controlled. Compared to previous approaches, there is the advantage that the use of the binder directly as a function of wetting with the binder

Material surface takes place. The use of the binder is optimized. An optimal amount of binder is introduced. On the one hand costs of a excessive binder use can be avoided and on the other hand, a high quality of the produced material plates are ensured.

The control device according to the invention can in particular in a

Insertion device for introducing a binder in a system for

Production of material plates are used. In such a system scatterable material is wetted with binder and fed to the compression.

Preferably, a continuous belt press is used for this purpose.

The inventive methods are particularly suitable for operation in a system for the production of material plates. The control method can be used for

 Control of a metering element in an existing system, which was possibly extended to sensors used.

In a preferred embodiment of the control device, the measuring interface is designed to receive a height value from a, preferably tactile, displacement sensor for continuously determining a material height of the material in the material inlet; and the processor is configured to calculate the material density based on the material height. By means of a displacement sensor, the height of the material conveyed on a conveyor belt can be continuously measured. For this purpose, a tactile sensor (touch sensor) is preferably provided. In previous systems, no comparable sensors are used. By using a displacement sensor, it is possible to continuously obtain information about the volume of material introduced in the material feed. The corresponding height value (measured value) is used in the processor, if necessary in conjunction with other measured values, to calculate the material density. Based on the material height and a given by the system geometry and known width, the material volume can be determined. The measurement of the volume of the introduced material is often directly meaningful with regard to the material density. In comparison to previous approaches, a precise statement about the material density is used to optimize the use of the binder, whereby manufacturing costs can be saved. In a further refinement, the measurement interface is designed to receive a weight value from a weight sensor, preferably a belt scale, for continuously determining weight information of the material in the material feed; and the processor is configured to calculate the material density based on the weight information. By using a weight sensor, which is preferably designed as a belt weigher, it is possible to continuously measure the weight of the supplied material in the material feed. The measured weight is preferably used only as additional information in the calculation of

Material density (mass per volume). By using a weight sensor it is possible to make a precise statement about the current material density and to optimize the dosage of the binder.

Advantageously, the processor is designed to determine the dosing value based on a basic value predefined for a nominal value of the material density. In previous production systems, a value for the amount of binder to be introduced is usually noted in a recipe. According to the invention, this recipe is extended to the effect that, in addition, an expected material density (nominal value) is indicated. By comparing this set point with the currently measured value of the material density, it can be determined whether the binder dosage (compared to the base value) should be increased or decreased. Compared to previous facilities can thus an automatic adjustment of

 Binder dosage are made. The basic value and the associated setpoint value are preferably from a plant manufacturer or from a

if necessary, can be adapted during operation. The additional specification of the target value of the material density allows a precise control of the introduction of the binder and thus a high quality of the produced material plates at lower material costs.

Advantageously, the processor is designed to determine the dosing value based on a variable coefficient, preferably for determining the dosing value as the sum of the basic value and the coefficient; and the coefficient results from a

Predefined assignment to a deviation of the calculated material density of the setpoint. The variable coefficient is determined based on the calculated material density with respect to the setpoint. By using a predefined variable coefficient depending on the deviation of the actual material density from the target value, a simple and efficient control of the binder dosage can be made possible. The introduced amount of the binder is therefore adjusted to whether the material density at the current time is higher or lower than the target value, ie the expected value. The dosage of the binder is optimized. With constant board quality, the amount of binder used can be reduced, resulting in cost savings.

In an advantageous embodiment, the processor is designed to determine the dosing value as a linear function between a minimum value as the lowest possible dosage and a maximum value as the highest possible dosage. By using a linear function, an efficient derivation of the dosing value is made possible. By using a double-sided limit for the amount of binder to be introduced (minimum value or maximum value) ensures that a

Minimum quantity not exceeded or a maximum quantity is not exceeded. Outliers are prevented. Reliable information regarding upper and lower limit values, which are necessary, for example, as quality data for material boards, is made possible.

In a preferred embodiment, the control interface for transmitting the control signal to a metering pump is formed; and the control signal comprises a rotational speed information of the metering pump. Preferably, the metering element is as

Dosing pump formed. In a metering pump, the introduced

Binder quantity can be varied speed-controlled. Due to a higher speed, a higher amount of binder is introduced. An immediate effect on the amount of binder is made possible.

In an alternative or cumulative embodiment, the control interface for transmitting the control signal to controllable valves for spray nozzles and / or a nozzle arrangement or their supply lines may be formed and the

Control signal include a control information for the valves. Straight direct valves in the nozzles allow a particularly precise control of the binder and the discharge amount. The accuracy of the discharge amount can be optimized by measuring devices in the supply lines and / or the nozzles for the flow rate.

In a preferred embodiment of the control method according to the invention, the method comprises a step of determining the dosing value based on a basic value predefined for a desired value of the material density. As already described above, an indication of a material density (nominal value) is thus predefined for a specific binder dosage. Based on this setpoint, a control can be made based on deviations of the current material density from this setpoint. Deviations can be corrected to the extent that the amount of binder introduced is adjusted accordingly.

In a further advantageous embodiment, the control method comprises a step of determining the dosing value based on a variable coefficient, preferably the determination of the dosing value as the sum of the basic value and the coefficient, wherein the coefficient results from a predefined assignment to a deviation of the calculated material density from the desired value , As also previously described, a simple and robust control can be achieved by a variable coefficient, which is determined from a predefined assignment to a deviation of the actual material density from the desired value.

Advantageously, the control method further comprises a step of determining the dosage value as a linear function between a minimum value as

lowest possible dosage and a maximum value as highest possible dosage. A linear function can be implemented easily and in a memory-efficient manner. An amount that moves between a minimum and a maximum value allows a reliable indication of minimum and maximum dosages, as often required in a manual or a product description.

Herein denotes a measuring or a control interface, in particular a hardware or software implemented connection point for connecting or reading a transmitter (sensor). The interface is according to the

connected device formed. A measured value is understood to be a value provided by a sensor, or a signal that is a physical one Reflects phenomenon. In most cases, an analog or digital signal is to be understood by it. Under a control signal is an analog or digital, usually continuously transmitted signal, which in a trained accordingly

Dosing can be processed. The term "continuous" is understood herein to mean continuous production of material plates, determination of a measurand, control of a dosing element, etc. However, it is possible that parts of a continuous process also run clocked.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

In particular, can be used as dosing an already known dosing and / or

Mixing device for wetting agents, such as adhesives, glues, glue liquors, Addtive, hardeners or the like are controlled, which in turn the

corresponding order volumes distributed to the one or more nozzles for wetting.

The invention achieves excellent results, in particular, when, instead of a pure material flow from one type of material (wood), particles of another type, for example plastics, fillers, wood or plastic recyclates or other substances, are added. The transport of the material stream can then lead to classifying effects which require a suitable wetting. In particular, in this connection, however, it is also provided independently for a material flow which is homogeneous in its material type, that the control device preferably has a high degree of stability

fluctuating densities (bulk densities) a path-time tracking from the place of measurement (measuring element) to the place of wetting (nozzle arrangement,

Dosing element) in their control or regulation involves. In comparison, slowly fluctuating bulk densities result from the fact that optimal chips are produced at the beginning of production in a knife ring chipper (during the production of chips). During the production time, then a deteriorating state of the knives (grinding condition) affects the quality of the chips and changes their geometry. For this reason, the blades must be regularly reground, which can lead to periodic changes in the chip geometries. According to the invention, such fluctuations can be responded by adjusting the binder dosage.

The invention will be described in more detail below with reference to some selected embodiments in conjunction with the accompanying drawings and explained. The figures show a schematic representation of a system for

 continuous production of material plates with a delivery device and a control device according to the present invention; a schematic representation of an alternative

 Embodiment of a system for the continuous production of material plates; a schematic representation of a control device for driving a metering for dosing a

 Binder according to one aspect of the present invention; and a schematic representation of an association between a material density and a variable coefficient for use in calculating the dosing value.

1 shows a section of a system 10 of a system for the continuous production of material plates in a sectional view is shown schematically. In a feed device 12, binder is introduced into a continuous material flow of spreadable material 14. In the region of a material inlet 16 of the introduction device 12, a measuring element 18 is arranged, through which a measured value with information for determining the material density of the spreadable material 14 can be won. According to the invention, a control device 20 is provided, by means of which, based on the measured value, a metering element 22 is actuated. By means of the metering element 22, binder is introduced into the spreadable material 14 in a wetting device 24. The binder used is preferably glue, but also the dosage according to the invention of other agents to be introduced is possible.

Such systems are used in particular in the production of material plates in continuous press systems. In the present figure, the actual press is not shown for clarity.

Scatterable material 14 is in particular wood chips (eg.

Cover shavings, middle-layer shavings), coarse chips or even wood fibers. Also surcharge parts or recycled material may be present in the material flow. The individual material components are called particles.

In particular, the present invention is suitable for use in the manufacture of chipboards and OSB boards from wood chips. Fluctuations in the

Material density (at constant weight) results from the fact that usually a wood mix is used as material. For example, solid wood of different types of wood, recycled wood, wood with different dust content, wood shavings, etc. can be used. In addition, in the wood mix used, fluctuations can also occur over the production time, which then lead to variations in the material density. Furthermore, different chip geometries can occur in the material to be used, which cause a different bulk density.

The material is introduced into the system 10 via a material feed 26. The material supply 26 is followed in the illustrated embodiment, a material bunker 28, which serves as a material storage for buffering. The material is from the material bunker 28 by means of floor belt 31 and discharge rollers 30 of

Feeding device 12 is supplied for introducing the binder. The

Insertion device 12 comprises in the region of a material inlet 16 a conveying means 32, which is preferably designed as a conveyor belt. The discharged material is noticeable this conveyor 32 or is scattered on the conveyor belt. While the material is in the material inlet 16, the material density by means of a

Measuring element 18 measured. In the case of a conveyor belt on which the material is scattered, the material density can therefore also be referred to as spreading density or bulk density. As a possibility of a measuring element 18, a radiating X-ray unit can be mentioned here, for example, whereby the radiographic values determined in this case must be converted in the control device, which can also be part of the X-ray unit. The suitable measured value for determining the density is transmitted via a control line to the control device 20, possibly also wirelessly, and utilized insofar as the control device can control a metering element 22 which is arranged for the wetting of the material.

Within the scope of the invention, use is made of the fact that the material density is dependent, inter alia, also on the chip geometry. Therefore, it is possible to conclude on the basis of the material density on the surface to be wetted with the binder of the particles and thus to respond to these variations with an adjustment of the dosage of the binder.

In the introduction of the binder are so far mostly only

Weight information of the dry wood continuously determined and used as the basis for the calculation of the amount of binder to be introduced. Compared to this approach, by taking into account the material density avoided, for example, that although a high weight of material measured and thus a relatively high amount of binder is introduced, but this is mainly due to the current material composition of predominantly large and thus heavy chips with a relatively smaller surface , According to the invention an excessive binder consumption and thus high costs are avoided without reducing the quality of the material plates. In the illustrated embodiment, the material 14 is formed by means of a Abschlagwalze 34 in an example, as a compulsory mixer

Wetting device 24 transferred. In the wetting apparatus 24, the binder is introduced via a nozzle arrangement 36, which is in operative connection with the controlled metering element 22 is. The trained as a compulsory mixer

Wetting device 24 mixes the spreadable material 14 with the

introduced binder and so wets the individual particles evenly. After mixing with the binder, the material 14 leaves the compulsory mixer to be fed to the compression. In most cases, this is another bunker (not shown) provided as a buffer memory, in which the material is first stored to compensate for short-term capacity fluctuations can. This bunker is connected downstream of the illustrated Materialweiterführung 38. The actual compression of the material to material plates then takes place preferably by means of a continuous (belt) press and under pressure / heat.

FIG. 2 likewise shows a section of a system 10 according to the invention schematically in a sectional illustration. Compared to the previous one

Representation, the wetting device 24 is formed as a chute with corresponding spray nozzles 40 for introducing the binder. The design of the wetting device 24 has no influence on the application of the

 Control device according to the present invention. The spray nozzles 40 can be considered as part of the metering element 22, since they set the manner of the quantity distribution of the binder on behalf of the metering element 22, which is controlled by the control device 20 to.

As measuring elements 18 for determining the material density in the illustrated preferred embodiment, a displacement sensor 18a and a weight sensor 18b are provided. The displacement sensor 18a is designed as a tactile (touch) sensor, which scans the surface of the material scattered on the conveying means 32 and performs an (indirect) volume measurement (with a known scattering width). Of the

 Weight sensor 18b is designed as a belt scale, which is in the material inlet 16, respectively belonging to the conveyor belt, integrated and clocked or continuously provides weight information. It is understood that in other embodiments, other numbers as well as other types of sensors, such as laser distance sensors, as

Measuring element can be used. In the figure 3 is a schematic representation of an inventive

Control device 20 shown. The control device 20 includes a

Measuring interface 42, which is in communication with at least one measuring element (sensor) and receives from this a measured value. The

Measurement interface can be implemented in hardware and / or in software. For example, the measurement interface a plug or a corresponding

 Driver interface correspond. The inventive control device 20 can in particular as a microcontroller, but also as software in one

Plant control to be formed. At least one measured value is obtained by at least one measuring element 18 via the measuring interface 42. The measured value contains information for determining the

Material density of the spreadable material. Preference is given to a continuous

Received measurement signal that reflects the current value of a measured variable. Based on the measured value in a processor 44 in the control device 20 is the

Material density calculated. For example, the material density may be determined based on a weight as well as a volume of the material detected by means of a displacement and weight sensor.

Based on this calculated material density, a metering value for the dosage of the binder to be introduced is then determined. A metering value is to be understood in particular as meaning the amount of binder to be introduced per unit time. Based on this Dosierwert is via a control interface 46, the

Dosing element 22 by means of a control signal so controlled that a the

Dosage corresponding dosage of the binder comes about. The

Control signal can be both an analog and a digital signal.

The method according to the invention carries out the method steps of the control device 20 described above. For example, the inventive method as a control program in an already existing, a machine control of a

Complete plant for the production of material plates or a continuous press be implemented. The determination of the dosage amount based on the material density is preferably implemented as a function or as a lookup table. From the

Input variable (current material density) is determined according to a predefined specification or specification of an output variable (dosing value or dosing agent quantity). In most cases, the dosing value refers to a percentage scale, in which the proportion of the binder is given by the weight of the material plates to be produced.

FIG. 4 schematically shows an exemplary determination of the dosing value. A basic value of the dosage (preferably also as a percentage) is first taken from a recipe as in a classical regulation. The recipe represents a kind of recommendation, which was determined, for example, on the basis of one's own experience or on the basis of a specification from the plant manufacturer. The base value defines a "normal" amount of binder for a particular type of material and desired plate properties, which is then corrected using a variable and material density-based coefficient to compensate for possible variations in the composition of the material and thus in the amount of binder required. The variable coefficient thus represents a type of correction factor for tuning the basic value to the current material to be wetted.

In the calculation, a setpoint is included, which is one of expected

Material density corresponds. The correction of the basic value takes place on the basis of a deviation of the current measured value of the material density from this desired value.

Base value, dosing value, setpoint and variable coefficient are preferably given on a percentage scale. However, it is understood that the indication on an absolute (weight) scale is possible. Also a combination is possible.

In the example shown, the currently determined material density is plotted on the x-axis and the resulting (assigned) coefficient on the y-axis. In the present case, a variable coefficient of y2 is assigned to the desired value at point x2. For example, a material density (bulk density, nominal value) of 215 kg / m ³ (x2), which is to be mixed according to the recipe with 10% binder (basic value), a variable coefficient of 0% (y2) to be assigned. Unless then in determining the current

Material density is deviated from this setpoint up or down is over the variable coefficient a correction of the dosage made. For example, a variable material value of 180 kg / m ³ (x1) can be assigned a variable coefficient of -0.4% (y1) and a current material density of 250 kg / m ³ (x3) a variable coefficient of +0.4%. (y3), resulting in a dosage of 9.6% and 10.4%, respectively.

As can be seen in the example shown, a minimum value of the variable coefficient can additionally be provided (for x <x1), which is not undershot even if the material density continues to decrease. The same applies to a maximum value (for x> x3), which must not be exceeded even if a predefined material density is exceeded. This increases the safety of the system.

It is understood that the o.g. Numbers as well as the illustrated partially linear function are merely exemplary understood. Different assignments of the setpoint to the points x1, x2 and x3 are possible. It is also possible for the basic value to represent a one-sided limitation of the dosing value up or down, that is to say it can not be undershot or exceeded (eg basic value corresponds to value at the position y3).

The principle of the present invention is particularly advantageous in chipboard and OSB boards in which the material is applied in the material inlet of the introduction device by scattering and as a material density a scattering density can be measured. It is understood that it is possible and useful to determine the material density even with differently designed material feeds, for example in blow-lines, in the production of MDF boards, based on the

To regulate binder dosage.

The invention has been fully described and explained with reference to the drawings and the description. The description and explanation are to be considered as illustrative and not restrictive. The invention is not disclosed on the

Limited embodiments. Other embodiments or variations will become apparent to those skilled in the art using the present invention, as well as a detailed analysis of the drawings, the disclosure, and the following

Claims. In the claims, the words "comprise" and "with" do not include that

 Presence of other elements or steps. The undefined article "a" or "an" does not exclude the presence of a plurality. A single element or unit may perform the functions of several of the units recited in the claims. The mere mention of some measures in several different dependent claims is not to be understood that a combination of these measures can not be used equally advantageous.

A computer program can run on a non-volatile medium

stored / distributed, for example, on an optical memory or on a semiconductor drive (SSD). A computer program may be distributed along with hardware and / or as part of a hardware, for example, via the Internet or via wired or wireless communication systems. Reference signs in the claims are not intended to be limiting.

Reference list P1541:

10 system

 12 insertion device

14 material

 16 material feed

18 measuring element

 18a displacement sensor

 18b weight sensor

20 control device

22 dosing element

24 wetting device

26 material supply

28 material bunkers

30 discharge rollers

31 floor tape

 32 subsidies

 34 teeing roll

36 nozzle arrangement

38 Material transfer

40 spray nozzle

 42 measuring interface

44 processor

 46 control interface

Claims

claims Control device (20) for actuating a metering element (22) of a Wetting device (24) for dosing a binder in the course of Production of material plates from scatterable material (14), with:  - A measuring interface (42) for receiving a measured value with  Information for determining the material density of the spreadable material in a material inlet (16) of an introduction device (12) for a  Wetting device (24);  a processor (44) for calculating the material density based on the at least one measured value and for determining a dosage value based on the material density; and  - A control interface (46) for transmitting a control signal to the metering element (22) to control the metering element (22) for metering the binder according to the determined metering value. Control device (20) according to claim 1, characterized in that the measurement interface (42) is configured to receive a height value from a preferably tactile displacement sensor (18a) for continuously determining a material height of the material (14) in the material feed (16) and the processor (44) calculates the material density based on the material density Material height is formed. Control device (20) according to claim 1 or 2, characterized in that the measuring interface (42) for receiving a weight value of a Weight sensor (18b), preferably a belt scale, for continuously determining a weight information of the material (14) in the material inlet (16) is formed and the processor (44) is designed for calculating the material density based on the weight information. Control device (20) according to one of the preceding claims, characterized in that the processor (44) is designed to determine the dosing value based on a predefined for a desired value of the material density basic value. Control device (20) according to any one of the preceding claims, characterized in that the processor (44) for determining the Dosierwerts based on a variable coefficient, preferably for determining the Dosierwert as the sum of the base value and coefficient, is formed and the coefficient of a predefined Assignment to a deviation of the calculated material density results from the desired value. Control device (20) according to one of the preceding claims, characterized in that the processor (44) is designed to determine the Dosierwertes as a linear function between a minimum value as the lowest possible dosage and a maximum value as the highest possible dosage. Control device (20) according to one of the preceding claims, characterized in that the control interface (46) for transmitting the Control signal to a metering pump is formed and the control signal comprises a rotational speed information of the metering pump and / or that the control interface (46) for transmitting the control signal to controllable valves for spray nozzles (40) and / or a nozzle assembly (36) respectively the supply lines is formed and the Control signal comprises a control information for the valves. Insertion device (12) for introducing a binder into a continuous material flow of spreadable material (14), comprising:  - A material inlet (16) for supplying the spreadable material, wherein the material feed preferably comprises a conveyor belt; a measuring element (18) for measuring a measured value with information for determining the material density of the scatterable material in the material feed, 5 wherein the measuring element preferably a displacement sensor (18a) for  continuously determining a material height of the material and / or a weight sensor (18b) for continuously determining a  Weight information comprises;  - A control device (20) according to one of the preceding claims; and 10 - a metering element (22) for metering the binder in dependence of  Control signal, wherein the metering element is preferably designed as a metering pump. 9. System (10) for the continuous production of material plates, with a 15 Einbringvorrichtung (12) according to claim 8 and a wetting device (24) for wetting the spreadable material (14) with the binder. 10. Control method for controlling a metering element (22) for metering a binder in a wetting device (24) in the course of the production of 20 material plates made of spreadable material (14), with the steps:  Receive a metric with information to determine the density of the material  the spreadable material in a material inlet (16) of a  Insertion device (12) for introducing the material into the  25 wetting device (24);  Calculating the material density based on the at least one measured value and determining a dosage value based on the material density; and  Transmitting a control signal to a metering element (22) to the metering element (22) for metering the binder according to the To control 30 determined dosing. 1 1. A control method according to claim 10, comprising the step of determining the dosing value  based on a basic value predefined for a nominal value of the material density. 12. The control method according to claim 10, further comprising the step of determining the dosing value based on a variable coefficient, preferably determining the dosing value as the sum of the basic value and the coefficient, the coefficient being a predefined assignment results in a deviation of the calculated material density from the desired value. Control method according to one of claims 10 to 12, comprising the step of determining the dosing value as a linear function between a minimum value as the lowest possible dosage and a maximum value as the highest possible dosage. A method of introducing a binder into a continuous stream of flowable material (14) comprising the steps of:  Feeding the spreadable material in a material feed (16);  Measuring a measured value with information for determining the material density of the spreadable material in the material feed;  Carrying out a control method according to one of claims 10 to 13; and dosing the binder according to the calculated dosing value. A computer program product comprising a data carrier storing program code adapted to carry out a method comprising the steps of any one of claims 10 to 14 when the program code is executed.