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WO2018150041A2 - Dispositif et procédé de commande servant à doser un liant, dispositif et procédé d'introduction servant à introduire un liant dans un flux de matériau, ainsi que système servant à fabriquer des panneaux de matériau - Google Patents

Dispositif et procédé de commande servant à doser un liant, dispositif et procédé d'introduction servant à introduire un liant dans un flux de matériau, ainsi que système servant à fabriquer des panneaux de matériau Download PDF

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Publication number
WO2018150041A2
WO2018150041A2 PCT/EP2018/054102 EP2018054102W WO2018150041A2 WO 2018150041 A2 WO2018150041 A2 WO 2018150041A2 EP 2018054102 W EP2018054102 W EP 2018054102W WO 2018150041 A2 WO2018150041 A2 WO 2018150041A2
Authority
WO
WIPO (PCT)
Prior art keywords
value
binder
metering
control
determining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/054102
Other languages
German (de)
English (en)
Other versions
WO2018150041A3 (fr
Inventor
Philipp-Jan ENDERS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of WO2018150041A2 publication Critical patent/WO2018150041A2/fr
Publication of WO2018150041A3 publication Critical patent/WO2018150041A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/029—Feeding; Proportioning; Controlling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/146—Controlling mat weight distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged

Definitions

  • 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 Einbringbacter for introducing a binder into a continuous material flow scatterable material and a system for producing material plates.
  • a mixture of particles and / or fibrous matter eg, wood chips or other lignocellulosic material
  • a binder eg, glue
  • This grit mat is then after a possibly required pre-treatment of a continuous or
  • discontinuous compression which can be done by means of pressure and / or heat.
  • chipboards, MDF (medium-density fiberboard) or Oriented Strand Board (OSB) boards can be produced in this manner.
  • a binder 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.
  • 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
  • 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.
  • 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
  • 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
  • Bindeffens 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
  • a measuring interface for receiving a measured value
  • 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
  • the invention relates to a delivery device for
  • Introducing a binder into a continuous material stream of spreadable material comprising:
  • 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 metering element for metering the binder in response to the control signal, wherein the metering element is preferably designed as a metering pump.
  • an aspect of the invention relates to a system for the continuous production of material plates, comprising:
  • 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.
  • glue is usually used as a binder.
  • the binder is continuously sprayed, for example by means of a nozzle in the flow of material.
  • material density herein is meant a quantity calculated from detected measurements for the continuously supplied mass per volume of the spreadable material.
  • 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.
  • the dosage of the binder is not determined by the weight, but based on the material density.
  • the material density is based on a sensor value
  • 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.
  • control device can in particular in a
  • Insertion device for introducing a binder in a system for
  • the inventive methods are particularly suitable for operation in a system for the production of material plates.
  • the control method can be used for
  • 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.
  • a displacement sensor By means of a displacement sensor, the height of the material conveyed on a conveyor belt can be continuously measured.
  • a tactile sensor touchscreen sensor
  • no comparable sensors are used.
  • 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.
  • 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.
  • 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
  • the processor is designed to determine the dosing value based on a basic value predefined for a nominal value of the material density.
  • a value for the amount of binder to be introduced is usually noted in a recipe.
  • this recipe is extended to the effect that, in addition, an expected material density (nominal value) is indicated.
  • an expected material density nominal value
  • 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.
  • 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
  • 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.
  • a linear function By using a linear function, an efficient derivation of the dosing value is made possible.
  • a double-sided limit for the amount of binder to be introduced (minimum value or maximum value) ensures that a
  • 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.
  • the metering element is as
  • 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.
  • 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.
  • the method comprises a step of determining the dosing value based on a basic value predefined for a desired value of the material density.
  • a basic value predefined for a desired value of the material density.
  • an indication of a material density is thus predefined for a specific binder dosage.
  • 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.
  • 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 ,
  • 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.
  • control method further comprises a step of determining the dosage value as a linear function between a minimum value as
  • 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.
  • 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
  • a measured value is understood to be a value provided by a sensor, or a signal that is a physical one Reflects phenomenon.
  • 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.
  • 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.
  • 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.
  • the control device preferably has a high degree of stability
  • Dosing element in their control or regulation involves.
  • 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).
  • a deteriorating state of the knives 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.
  • Scatterable material 14 is in particular wood chips (eg.
  • the present invention is suitable for use in the manufacture of chipboards and OSB boards from wood chips. Fluctuations in the
  • Material density 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.
  • 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.
  • 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.
  • 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.
  • Weight information of the dry wood continuously determined and used as the basis for the calculation of the amount of binder to be introduced is 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.
  • the material 14 is formed by means of a Abtschwalze 34 in an example, as a compulsory mixer
  • wetting device 24 transferred.
  • the binder is introduced via a nozzle arrangement 36, which is in operative connection with the controlled metering element 22 is.
  • Wetting device 24 mixes the spreadable material 14 with the
  • the material 14 leaves the compulsory mixer to be fed to the compression.
  • this 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 Materialweiter Unit 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.
  • 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
  • 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.
  • 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).
  • 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.
  • FIG 3 is a schematic representation of an inventive
  • the 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.
  • Measurement interface can be implemented in hardware and / or in software.
  • the measurement interface a plug or a corresponding
  • the inventive control device 20 can in particular as a microcontroller, but also as software in one
  • 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
  • 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
  • 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
  • Control signal can be both an analog and a digital signal.
  • the determination of the dosage amount based on the material density is preferably implemented as a function or as a lookup table.
  • 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.
  • Material density is deviated from this setpoint up or down is over the variable coefficient a correction of the dosage made.
  • 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.
  • 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.
  • a maximum value for x> x3
  • 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
  • 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.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne un dispositif de commande (20) servant à piloter un élément de dosage (22) d'un dispositif d'humidification (24) servant à doser un liant dans le cadre de la fabrication de panneaux de matériau composés d'un matériau (14) pouvant être dispersé. Le dispositif de commande comprend : une interface de mesure (42) servant à recevoir une valeur de mesure contenant des informations servant à déterminer la densité de matériau du matériau pouvant être dispersé dans une arrivée de matériau (16) d'un dispositif d'introduction (12) pour un dispositif d'humidification (24) ; un processeur (44) servant à calculer la densité de matériau sur la base de la ou des valeurs de mesure et servant à déterminer une valeur de dosage sur la base de la densité de matériau ; et une interface de commande (46) servant à transmettre un signal de commande à l'élément de dosage (22) afin de piloter l'élément de dosage (22) servant à doser le liant conformément à la valeur de dosage déterminée. L'invention concerne par ailleurs un procédé de commande, un dispositif d'introduction (12) et un procédé d'introduction servant à introduire un liant dans un flux de matériau continu d'un matériau (14) pouvant être dispersé, ainsi qu'un système (10) servant à fabriquer des panneaux de matériau.
PCT/EP2018/054102 2017-02-20 2018-02-20 Dispositif et procédé de commande servant à doser un liant, dispositif et procédé d'introduction servant à introduire un liant dans un flux de matériau, ainsi que système servant à fabriquer des panneaux de matériau Ceased WO2018150041A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017103460.9 2017-02-20
DE102017103460.9A DE102017103460A1 (de) 2017-02-20 2017-02-20 Steuervorrichtung und -verfahren zum Dosieren eines Bindemittels, eine Einbringvorrichtung und -verfahren zum Einbringen eines Bindemittels in einen Materialstrom sowie ein System zur Herstellung von Werkstoffplatten

Publications (2)

Publication Number Publication Date
WO2018150041A2 true WO2018150041A2 (fr) 2018-08-23
WO2018150041A3 WO2018150041A3 (fr) 2018-10-11

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PCT/EP2018/054102 Ceased WO2018150041A2 (fr) 2017-02-20 2018-02-20 Dispositif et procédé de commande servant à doser un liant, dispositif et procédé d'introduction servant à introduire un liant dans un flux de matériau, ainsi que système servant à fabriquer des panneaux de matériau

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DE (1) DE102017103460A1 (fr)
WO (1) WO2018150041A2 (fr)

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WO2014079988A1 (fr) 2012-11-22 2014-05-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Ensemble puits de chute comportant un double système de nettoyage, destiné notamment à un dispositif permettant d'encoller des particules dans le cadre de la fabrication de panneaux de particules
WO2014079987A1 (fr) 2012-11-22 2014-05-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Ensemble puits de chute, dispositif et procédé destinés à nettoyer un puits de chute, notamment dans un dispositif permettant d'encoller des particules
EP2747966B1 (fr) 2011-06-14 2017-03-29 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé et dispositif pour encoller des particules qui sont constituées de fibres et/ou de copeaux appropriés pour la fabrication de panneaux de matériau

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CN101376253B (zh) * 2008-04-09 2010-12-29 国家林业局北京林业机械研究所 一种刨花板工业化生产刨花原料计量方法与设备
DE102009015561A1 (de) * 2009-03-30 2010-10-07 Dieffenbacher Gmbh + Co. Kg Verfahren zur Ermittlung des Gewichts einzelner Platten nach einer Presse und eine Anlage zur Herstellung von Holzwerkstoffplatten
DE202009012239U1 (de) * 2009-09-11 2011-01-20 Anton Heggenstaller Gmbh Produktionseinrichtung
CN103403068A (zh) * 2011-01-10 2013-11-20 丹麦植物纤维技术控股股份公司 用于木质纤维素材料改性的方法和设备以及通过该方法获得的改性木质纤维素材料的产品
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059877A1 (de) 2008-12-01 2010-06-02 Dieffenbacher Gmbh + Co. Kg Verfahren und Vorrichtung zur Beleimung von Spänen, Fasern oder faserähnlichem Material im Zuge der Herstellung von Werkstoffplatten
EP2747966B1 (fr) 2011-06-14 2017-03-29 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé et dispositif pour encoller des particules qui sont constituées de fibres et/ou de copeaux appropriés pour la fabrication de panneaux de matériau
WO2014079988A1 (fr) 2012-11-22 2014-05-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Ensemble puits de chute comportant un double système de nettoyage, destiné notamment à un dispositif permettant d'encoller des particules dans le cadre de la fabrication de panneaux de particules
WO2014079987A1 (fr) 2012-11-22 2014-05-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Ensemble puits de chute, dispositif et procédé destinés à nettoyer un puits de chute, notamment dans un dispositif permettant d'encoller des particules

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Publication number Publication date
DE102017103460A1 (de) 2018-08-23
WO2018150041A3 (fr) 2018-10-11

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