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WO2025071512A1 - Système d'extrusion de fluides non newtoniens par régulation de leur débit massique - Google Patents

Système d'extrusion de fluides non newtoniens par régulation de leur débit massique Download PDF

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Publication number
WO2025071512A1
WO2025071512A1 PCT/TR2023/051114 TR2023051114W WO2025071512A1 WO 2025071512 A1 WO2025071512 A1 WO 2025071512A1 TR 2023051114 W TR2023051114 W TR 2023051114W WO 2025071512 A1 WO2025071512 A1 WO 2025071512A1
Authority
WO
WIPO (PCT)
Prior art keywords
extrusion
expression
newtonian fluid
drive unit
pressure
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.)
Pending
Application number
PCT/TR2023/051114
Other languages
English (en)
Inventor
Ozkan BEBEK
Ozgur ERTUNC
Zeynep BASARAN BUNDUR
Ogulcan AHI
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.)
Ozyegin Universitesi
Original Assignee
Ozyegin Universitesi
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
Priority claimed from TR2023/012114 external-priority patent/TR2023012114A2/tr
Application filed by Ozyegin Universitesi filed Critical Ozyegin Universitesi
Publication of WO2025071512A1 publication Critical patent/WO2025071512A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92038—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/924—Barrel or housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92457—Drive section, e.g. gearbox, motor or drive fluids

Definitions

  • the invention relates to a system for ensuring the extrusion of non-Newtonian fluids by controlling the mass flow rate thereof, comprising an inlet end for entering non-Newtonian fluid; an extrusion chamber with an outlet end for allowing the non-Newtonian fluid to exit after extrusion; an extrusion element provided in said extrusion chamber for moving the non-Newtonian fluid from the inlet end to the outlet end; a drive unit for controlling the angular operating speed of said extrusion element; and a control unit for controlling said drive unit.
  • 3D printers are devices that are usually controlled by a computer and can create a physical object from a digital file. These devices create three-dimensional objects by building up materials layer by layer. This process is commonly called "3D printing.”
  • Extrusion is the process of continuously shaping a material by passing it through a certain section with the help of a special machine or tool.
  • the extrusion process in 3D printers can be carried out in different ways in different 3D printing technologies where different materials are used.
  • the extrusion process allows the object to be formed in layers in accordance with the desired size, shape, and properties.
  • the extrusion process in 3D printers is used in many fields such as construction, automotive, food, education, medicine, and health.
  • extrusion processes cannot be used for cement-based mixtures (mortar or concrete) in the construction sector, and if they are used, they cannot be applied for all types of cement-based mixtures. Therefore, rapid production, efficiency and durability controls cannot be carried out for the construction sector.
  • the present invention relates to a system to eliminate the above-mentioned disadvantages and bring new advantages to the relevant technical field.
  • An object of the invention is to provide a system for the output of a non-Newtonian fluid at the desired flow rate.
  • Another object of the invention is to provide a system that allows different fluid materials that are not Newtonian to be extruded at the desired mass flow rate.
  • the present invention is a system for controlling the mass flow rate of non-Newtonian fluids by extruding, comprising an inlet end for the introduction of non-Newtonian fluid, an extrusion chamber with an outlet end for allowing the non-Newtonian fluid to exit after extrusion, an extrusion element provided in said extrusion chamber for moving the nonNewtonian fluid from the inlet end to the outlet end; a drive unit for controlling the angular operating speed of said extrusion element; and a control unit for controlling said drive unit, to realize all the objects that will emerge from the abovementioned and the following detailed description.
  • the control unit is configured to apply the first pressure measurement received from the first pressure sensor, the second pressure measurement received from the second pressure sensor, and a torque measurement received from a torque determination device associated with the drive unit to a mathematical model and to change the angular operating speed of the drive unit according to the output value received from said mathematical model.
  • a possible embodiment of the invention characterized in that said extrusion element is a screw pump.
  • Another possible embodiment of the invention is characterized in that said drive unit comprises a motor and comprises a drive circuit that enables said motor to be driven according to the signal received from the control unit.
  • Figure 1 shows a schematic view of the system.
  • the invention relates to a system (100) wherein the extrusion mass flow rate of nonNewtonian fluids can be regulated.
  • the system (100) includes an extrusion chamber (110) including an inlet end (111) for the inlet of the non-Newtonian fluid, an outlet end (112) for the outlet of the non-Newtonian fluid, and an extrusion element (120) for moving the fluid within the extrusion chamber (110).
  • the system (100) comprises a drive unit (130) for controlling the speed of the extrusion element (120) and a control unit (140) for driving said drive unit (130).
  • the extrusion element (120) may be a screw pump.
  • the drive unit (130) is associated with a torque determination device (not shown).
  • the torque-determining device may be, for example, a device that measures the current consumed by the drive unit (130) and produces a torque value accordingly.
  • the system (100) further comprises a first pressure sensor (151 ) provided adjacent to the inlet end (111) and a second pressure sensor (152) provided adjacent to the outlet end (112).
  • the pressure sensors measure the pressure values of the non-Newtonian fluid at two points located at a certain distance from each other along the flow.
  • Said control unit (140) is configured to apply the pressure values received from the pressure sensors to a mathematical model and to change the angular operating speed of the drive unit (130) according to the output value received from the model. With said pressure sensors, the pressure difference between the inlet end (111) and the outlet end (112) of the system (100) can be detected.
  • the diameter of the extrusion chamber (110) is also defined as a first length (D).
  • the distance between the two pressure sensors is a second length (L).
  • Said mathematical model is the following formula wherein the expression p is the mass of the non-Newtonian fluid; v is the kinematic viscosity; the value of the parameter p is preregistered in a memory unit accessed by the control unit (140); D is the radius of the extrusion chamber (110), AP is the difference between the first pressure measurement and the second pressure measurement; T is the torque value; Q is the target volumetric flow rate of the non-Newtonian fluid; co is the angular operating speed of the drive unit (130):
  • the expression a in said mathematical model is 4-10 5
  • the expression b is +0.2608
  • the control unit is configured to access a memory unit where the expressions a, b, p, v, D, Q, co, AP, T are pre-registered.
  • the kinematic viscosity can be calculated by one of the methods known in the art, and the inputs required to calculate this value can be entered into the system (100) beforehand.
  • the non-Newtonian fluid is cementitious-based materials in a possible embodiment of the invention. Different types of cement-based mixtures can be used, and the extrusion process can be arranged accordingly.
  • the extrusion element (120) is a screw pump in a possible embodiment of the invention.
  • the fact that the extrusion element (120) is a screw pump allows the fluid to be mixed and guided in an order under a certain pressure. A stronger mechanism is required for the proper handling and dosing of some materials according to the type of fluid, and this is provided by the screw pump used.
  • the system (100) comprises a DC motor and a drive circuit that enables the DC motor to be driven according to the signal received from the control unit (140) in a possible embodiment of the invention.
  • the DC motor is used to provide the necessary rotation of the extrusion process.
  • the drive circuit may comprise a servo drive circuit and the system (100) is configured to operate with the supply voltage received from a power source.
  • DAQ ensures efficient, fast, high-accuracy data collection and recording with data collection. At the same time, it is ensured that the system (100) data is monitored and recorded remotely with DAQ.
  • the DAQ is provided in 16-bit A/D type in a possible embodiment of the invention.
  • the control unit (140) may be the central processing unit (CPU) or the programmable logic controller (PLC) in a possible embodiment of the invention.
  • the communication unit can use wireless or wired communication methods such as Wi-Fi, and Bluetooth.
  • the system (100) uses a feedback control algorithm in a possible embodiment of the invention so that the instantaneous flow rate is controlled, and the extrusion process is carried out at the desired values.
  • the system (100) uses cement-based materials (e.g. Mortar or Concrete) allowing the extrusion speed to be controlled, the flow rate of the material to be determined, and the adjustment to the measurement values to be made automatically.
  • cement-based materials e.g. Mortar or Concrete
  • the screw pump used in the system (100) the cement-based mixture can be transported in a smooth and continuous flow, thus ensuring that the 3D printer produces uninterrupted and consistent output. Since the material moves at the right mass flow rate and the right speed, the output quality and accuracy of the printer increase.
  • the extrusion chamber may consist of a plexiglass tube with a diameter of 100 mm and a thickness of 2 mm in a possible embodiment of the invention.
  • a plexiglass tube By choosing a plexiglass tube, the material can be easily seen from the outside, and since it is durable and waterproof, it ensures that the material in it is protected from external influences.
  • the diameter value is configured to minimize the gap between the outer screw wall and the pipe to prevent any backflow.
  • the desired mass flow rate, rheological parameter, and density values of the cementbased material are entered into the system (100) in a possible embodiment of the invention.
  • the system (100) is started with the first estimate of the rotational speed; the measured values are recorded by following the DAQ, and a model is provided with the data.
  • This model calculates whether the target volume flow rate is sufficient using the given rotational speed, measured pressure values, and measured torque value and checks the equality. If the flow rate is not at the desired level as a result of the calculation, the angular operating speed is changed by the system (100) and this calculation continues until the speed reaches the desired level.
  • An electronic scale (not shown) may be used to weigh the extruded sample and determine the mass flow rate in a possible embodiment of the invention.
  • the scope of protection of the invention is specified in the attached claims and cannot be limited to those explained for sampling purposes in this detailed description. It is evident that a person skilled in the art may exhibit similar embodiments in light of the above- mentioned facts without drifting apart from the main theme of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Système (100) pour permettre l'extrusion de fluides non newtoniens par régulation du débit massique, comprenant : une extrémité d'entrée (111) pour introduire un fluide non newtonien, une chambre d'extrusion (110) ayant une extrémité de sortie (112) pour permettre au fluide non newtonien de sortir après extrusion, un élément d'extrusion (120) disposé dans ladite chambre d'extrusion (110) pour déplacer le fluide non newtonien de l'extrémité d'entrée (111) à l'extrémité de sortie (112), une unité d'entraînement (130) pour commander la vitesse de fonctionnement angulaire dudit élément d'extrusion (120), une unité de commande (140) pour commander ladite unité d'entraînement (130). En conséquence, il est caractérisé en ce qu'il comprend un premier capteur de pression (151) disposé adjacent à l'extrémité d'entrée (111) et utilisé pour mesurer la pression du fluide non newtonien; un second capteur de pression (152) disposé adjacent à l'extrémité de sortie (112) et utilisé pour mesurer la pression du fluide non newtonien; la première mesure de pression prise par l'unité de commande (140) à partir du premier capteur de pression (151) est configurée pour appliquer la seconde mesure de pression prise à partir du second capteur de pression (152) et une mesure de couple prise à partir d'un dispositif de détermination de couple associé à l'unité d'entraînement à un modèle mathématique et pour modifier la vitesse de fonctionnement de l'unité d'entraînement (130) en fonction de la valeur de sortie prise à partir dudit modèle mathématique.
PCT/TR2023/051114 2023-09-28 2023-10-11 Système d'extrusion de fluides non newtoniens par régulation de leur débit massique Pending WO2025071512A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2023/012114 TR2023012114A2 (tr) 2023-09-28 Newtonsal olmayan sivilarin kütlesel debi̇si̇ni̇ kontrol edi̇lerek ekstrüzyonu i̇çi̇n bi̇r si̇stem
TR2023012114 2023-09-28

Publications (1)

Publication Number Publication Date
WO2025071512A1 true WO2025071512A1 (fr) 2025-04-03

Family

ID=95201953

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2023/051114 Pending WO2025071512A1 (fr) 2023-09-28 2023-10-11 Système d'extrusion de fluides non newtoniens par régulation de leur débit massique

Country Status (1)

Country Link
WO (1) WO2025071512A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403280A2 (fr) * 1989-06-16 1990-12-19 Nordson Corporation Dispositif de contrôle du courant de matière dans un procédé de distribution d'un fluide
WO2007005396A1 (fr) * 2005-07-01 2007-01-11 Nordson Corporation Appareil et procede d'application d'un adhesif lors d'operations d'etiquetage
US9186695B2 (en) * 2010-04-01 2015-11-17 B&H Manufacturing Company, Inc. Extrusion application system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403280A2 (fr) * 1989-06-16 1990-12-19 Nordson Corporation Dispositif de contrôle du courant de matière dans un procédé de distribution d'un fluide
WO2007005396A1 (fr) * 2005-07-01 2007-01-11 Nordson Corporation Appareil et procede d'application d'un adhesif lors d'operations d'etiquetage
US9186695B2 (en) * 2010-04-01 2015-11-17 B&H Manufacturing Company, Inc. Extrusion application system

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