WO2025189268A1 - Système et procédé intégré de dépôt de films minces sur des pièces - Google Patents

Système et procédé intégré de dépôt de films minces sur des pièces

Info

Publication number
WO2025189268A1
WO2025189268A1 PCT/BR2025/050094 BR2025050094W WO2025189268A1 WO 2025189268 A1 WO2025189268 A1 WO 2025189268A1 BR 2025050094 W BR2025050094 W BR 2025050094W WO 2025189268 A1 WO2025189268 A1 WO 2025189268A1
Authority
WO
WIPO (PCT)
Prior art keywords
spray head
parts
part holder
deposition
chamber
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/BR2025/050094
Other languages
English (en)
Portuguese (pt)
Inventor
Flavio Leandro DE SOUZA
Gabriel Henrique DE MORAIS
Bruno Henrique RAMOS DE LIMA
Lucas Daniel TOGNOLI LEITE
Tiago DE GOES CONTI
Murilo PEDROSO DOS SANTOS
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.)
Centro Nacional de Pesquisa em Energia e Materiais CNPEM
Original Assignee
Centro Nacional de Pesquisa em Energia e Materiais CNPEM
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 BR102024005001-0A external-priority patent/BR102024005001A2/pt
Application filed by Centro Nacional de Pesquisa em Energia e Materiais CNPEM filed Critical Centro Nacional de Pesquisa em Energia e Materiais CNPEM
Publication of WO2025189268A1 publication Critical patent/WO2025189268A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements

Definitions

  • the present invention relates to automated systems for spraying liquids to coat parts with thin films (coatings). This type of system is frequently used in industries where it is necessary to coat materials and objects with a substance for various purposes, such as improving product characteristics, enhancing or imparting functionality, or providing a protective layer.
  • the present invention relates to the automation of operations for applying fluid materials to surfaces.
  • Material coatings are commonly used in various industrial applications to impart unique properties and functionalities to the coated objects. Some examples are modifications of optical, mechanical, biomedical, photovoltaic, electronic, and catalytic properties.
  • a booth which encloses the system to contain overspray and provide a controlled environment for the coating process.
  • Some spray coating methods have the disadvantage of wasting a large amount of liquid. Increasing spray deposition efficiency is important as coating liquids have become more expensive, and it is desirable to apply the liquid uniformly to ensure that an intact, robust thin film of the desired thickness is formed.
  • EP2876183 describes an automated device model in which the gun moves along a path relative to the object to be coated, said path being defined by the geometry of the surface. Time-resolved spray position information is acquired, processed, and the route is corrected by the device. Designed especially for turbines, which are objects with a large surface area, it becomes complex for application in batch coatings, in a high-throughput scheme, of a set of devices with small size and surface area, such as drills, stents, and other medical devices, for example.
  • Patent document W02007103361A2 presents a system for coating medical devices by spraying, comprising:
  • a plurality of supports for holding a plurality of medical devices, such as stents, wherein the supports are positioned in a circular manner around a longitudinal axis of the rotating head, and wherein said supports can rotate around their own axis.
  • the rotary atomizer may be of the electrostatic type. Although simultaneous coating of several parts is achieved, in some cases, the size and design of rotary atomizers may limit their applicability in specific industrial environments or for certain purposes. products. Rotary atomizers can generate overspray, leading to loss of coating material. This can result in inefficiencies and increased material waste, especially in applications where precise material utilization is crucial. Furthermore, the high rotational speeds required for effective atomization can consume significant amounts of energy. This can contribute to higher operating costs, especially in processes where energy efficiency is a critical consideration.
  • the thin film formation process also includes a heat treatment step of the deposited liquid to solidify and adhere the film to the material's surface.
  • the treatment time and conditions depend on the specific properties of the coating material.
  • a drawback of the current technique is that, in general, this step depends on the manual transfer of the coated part from a spraying system to a dedicated oven or kiln, requiring human intervention. In the case of simultaneous coating of multiple small parts, this can be a limiting factor.
  • Another point is that, to complete the coating process of a single part, at least two separate pieces of equipment are required, which increases the need for available space for installation and may prevent small establishments from coating their objects in-house.
  • Patent document KR102199127B1 provides knowledge of an integrated modular device configured to apply powder paint to the surface of an object to be painted, in which the paint is transferred at a predetermined speed and the painting is carried out while the object is held on a table rotated by a plurality of rotating rollers.
  • the object to be coated is moved to the inlet by a transfer unit. After the coating is applied, a transfer module moves the coated object to an unloading section.
  • the entire device, from the inlet to the unloading section, is heated by a heating module: since the powder needs to be melted onto the object to form a coating film, the object is preheated at the device inlet, and the melting occurs in the unloading unit.
  • a heating module since the powder needs to be melted onto the object to form a coating film, the object is preheated at the device inlet, and the melting occurs in the unloading unit.
  • the present invention relates to an integrated liquid spraying system for the formation of thin films combined with the post-thermal treatment of the film deposited on the surface of one or a plurality of parts.
  • the integrated system of which this invention deals comprises: a) a cabin (1), whose internal space comprises an exhaust system, at least one humidity sensor, at least one temperature sensor, a spray head (2), supported by a mechanical spray head displacement system (3), a part holder (4) fixed to a mechanical part holder displacement system (5), at least one inductive presence sensor in a position adjacent to the spray head (2), an oven (6) arranged downstream of the spray head, and a ramp (8), starting upper downstream of the oven (6) and ending lower at the chamber outlet (1a); b) at least one coating fluid reservoir, connected to a spray head supply system which, in turn, is connected to the spray head (2); c) a dispenser, arranged downstream of the chamber outlet (1a); and d) a control unit, electrically connected to the furnace heating and exhaust systems, to the mechanical systems
  • the present invention is a fully automated and reproducible solution for executing all stages of the thin film-forming liquid deposition process, from liquid application to drying and heat treatment. The user interacts with the process only when inserting and extracting the parts.
  • the spray head (2) moves on the x, y and z axes by means of the mechanical spray head displacement system (3) after recognition of the positioning of the parts, allowing the economical deposition of film on them.
  • the part holder (4) which can accommodate one or more parts for batch coating, rotates around its axis through the part holder displacement system (5), allowing the total coating of the allocated parts, making the deposition more assertive.
  • the part holder displacement system also performs the additional function of drying the deposited film when activated by the control unit to rotate around its own axis, so that solvents are eliminated without losing the characteristics of colloidal coatings due to, for example, crystallization.
  • the spray head (2) is fully interchangeable, providing versatility in processes and avoiding possible contamination between procedures and being flexible for different colloidal particle sizes.
  • presence sensors can be coupled to the mechanical displacement system of the spray head (3) to integrate automated control.
  • Another advantage of the present invention is that the system features a furnace (6) at a specific and restricted point, not heating the system as a whole, and that the furnace (6), being composed of plates with independent displacements between them, is extremely versatile for various sizes of parts and allows temperature control by varying the distance between the plates.
  • Said furnace is fast-heating, heating to approximately 400°C in just 1.1 seconds, and uniform, speeding up the coating process and allowing reproducible results. In the case of colloidal treatments, this is of fundamental importance, since heat treatments must be fast so as not to alter their properties.
  • the objectives of the present invention are also achieved by a thin film deposition process by liquid spraying, with combined heat treatment and drying operations, carried out by the system described herein, in which the method comprises: a) insert one or more parts to be coated into the parts holder (4) and fix the parts holder (4) in the mechanical movement system of the parts holder (5); b) identify the geometry of one or more parts by means of the inductive presence sensor; c) program, by means of an algorithm stored in the control unit of the deposition system, a routine for deposition, drying and heat treatment of one or more parts inserted into the system and trigger the routine; d) deposit the liquid on the surface of one or more parts; e) rotate the parts holder to dry the deposited film; f) subject the part fixed in the parts holder to a heat treatment routine in the oven (6), eg) eject the parts holder (4) at the top start of the ramp (8).
  • the present process is fast, being achievable in times of the order of 5 minutes in total, and capable of being applied to coatings from colloidal suspensions without generating their crystallization.
  • Figure 1 is a schematic representation of a cross-section of the side view of the system of the present invention, in which are designated: a cabin (1), a spray head (2), a mechanical system for moving the spray head (3), a part holder (4), a mechanical system for moving the part holder (5), an oven (6), plate actuators (7), a ramp (8) and a chamber outlet (1a).
  • Figure 2 shows a detailed view of the mechanical system for moving the parts holder (5), showing parts (9) placed on the parts holder (4), the latter attached to a rotating support (5a) by means of a motor for fixing the parts holder (5b) connected to a cam (5c), and a fixing support (5d).
  • Figure 3 is a graphical representation of the oven (6), present in the system of the present invention, which comprises two plates (6a), which move independently in the vertical direction by means of plate actuators (6b), with a set of infrared lamps (6c).
  • Figure 4 shows greater detail of the plates (6a) of the furnace (6), highlighting the internal chamber (6e) and external chamber (6f) structures delimited by a reflective screen (6d).
  • the system of the present invention is characterized by the fact that it comprises: a) a cabin (1), whose internal space comprises an exhaust system, at least one humidity sensor, at least one temperature sensor, a spray head (2), supported by a mechanical spray head displacement system (3), a part holder (4) fixed to a mechanical part holder displacement system (5), at least one inductive presence sensor in a position adjacent to the spray head (2), an oven (6) arranged downstream of the spray head, and a ramp (8), starting upper downstream of the oven (6) and ending lower at the chamber outlet (1a); b) at least one coating liquid reservoir, connected to a spray head supply system which, in turn, is connected to the spray head (2); c) a dispenser, arranged downstream of the chamber outlet (1a); and d) a control unit, electrically connected to the furnace heating and exhaust systems, to the mechanical systems for moving the spray head (3) of the part holder (5), to the spray head (2), to the head feeding system sprayer, and the inductive presence sensor, in which the control unit comprises means
  • the cabin (1) includes a gas exhaust system as a way of maintaining its safety.
  • said exhaust system may comprise a fan or blower to create air flow within the cabin, ducts to guide the expelled air or vapors to the external environment and, optionally, filters to remove certain impurities before releasing the air.
  • the exhaust system is located at the top of the cabin (1).
  • Said parts holder (4) is removable and attachable to a mechanical system for moving the parts holder (5), located inside the chamber (1) and movable along rails arranged inside the chamber (1).
  • the system (5) comprises a rotating support (5a), a motor for fixing the parts holder (5b) connected to a cam (5c), and a fixing support (5d).
  • the parts holder (4) is fixed to the rotating support (5a) by means of the cam (5c) and the fixing support (5d).
  • the furnace (6) arranged downstream of the spray head (2) inside the chamber (1) is characterized by comprising two plates (6a) that move independently in the vertical direction by means of actuators plate (6b). This makes the furnace extremely versatile for various part sizes and also allows temperature control by varying the distance between the plates. It is also possible to operate as a fully sealed furnace, which increases the maximum achievable temperatures.
  • Each plate preferably has at least one infrared lamp, or a set of infrared lamps, which are used in the heat treatment of the parts. The infrared lamps allow extremely fast heating and are highly sensitive to current modulation.
  • Each plate (6a) comprises an inner chamber (6e) and an outer chamber (6f), delimited by a reflector screen (6d).
  • an algorithm is provided in the storage of the control unit, this algorithm being configured to identify the geometry of a part fixed in the part holder (4), by the use of the inductive presence sensor, and calculate a routine for deposition, drying and heat treatment of the part. Based on the routine calculated by this algorithm, the control unit is configured to send actuation signals to the heating and exhaust systems, the mechanical systems for moving the spray head (3) and the part holder (5), the spray head valve (2) and the spray head feeding system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray Control Apparatus (AREA)

Abstract

La présente invention concerne un système et un procédé permettant de réaliser une routine automatisée de dépôt de liquides, de séchage et de traitement thermique pour la formation de films minces sur des pièces de géométrie tridimensionnelle. Ledit système comprend une cabine (1), une tête de pulvérisation (2), un système mécanique de déplacement de la tête de pulvérisation (3), un porte-pièces (4), un système mécanique de déplacement du porte-pièces (5), un four (6), des actionneurs à plaque (7), une rampe (8) et une sortie de la chambre (1a).
PCT/BR2025/050094 2024-03-14 2025-03-14 Système et procédé intégré de dépôt de films minces sur des pièces Pending WO2025189268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR1020240050010 2024-03-14
BR102024005001-0A BR102024005001A2 (pt) 2024-03-14 Sistema e processo integrado de deposição de filmes finos sobre peças

Publications (1)

Publication Number Publication Date
WO2025189268A1 true WO2025189268A1 (fr) 2025-09-18

Family

ID=97062655

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2025/050094 Pending WO2025189268A1 (fr) 2024-03-14 2025-03-14 Système et procédé intégré de dépôt de films minces sur des pièces

Country Status (1)

Country Link
WO (1) WO2025189268A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1682282A1 (fr) * 2003-10-14 2006-07-26 Boston Scientific Limited Procede de revetement au rouleau de plusieurs endoprotheses
US20070163495A1 (en) * 2002-12-09 2007-07-19 Advanced Cardiovascular Systems, Inc. Apparatus And Method For Coating And Drying Multiple Stents
WO2011028619A2 (fr) * 2009-09-04 2011-03-10 Abbott Cardiovascular Systems Inc. Revêtements à élution de médicament appliqués à des dispositifs médicaux par vaporisation et séchage pour éliminer un solvant
KR20160075239A (ko) * 2014-12-19 2016-06-29 공주대학교 산학협력단 초정밀 스텐트 스핀코팅장치 및 방법
EP3103483A1 (fr) * 2007-06-15 2016-12-14 Abbott Cardiovascular Systems Inc. Système et procédé de revêtement d'endoprothèse
CN209519951U (zh) * 2018-12-13 2019-10-22 深圳市悦目光学器件有限公司 一种提高效益的喷涂镀膜设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070163495A1 (en) * 2002-12-09 2007-07-19 Advanced Cardiovascular Systems, Inc. Apparatus And Method For Coating And Drying Multiple Stents
EP1682282A1 (fr) * 2003-10-14 2006-07-26 Boston Scientific Limited Procede de revetement au rouleau de plusieurs endoprotheses
EP3103483A1 (fr) * 2007-06-15 2016-12-14 Abbott Cardiovascular Systems Inc. Système et procédé de revêtement d'endoprothèse
WO2011028619A2 (fr) * 2009-09-04 2011-03-10 Abbott Cardiovascular Systems Inc. Revêtements à élution de médicament appliqués à des dispositifs médicaux par vaporisation et séchage pour éliminer un solvant
KR20160075239A (ko) * 2014-12-19 2016-06-29 공주대학교 산학협력단 초정밀 스텐트 스핀코팅장치 및 방법
CN209519951U (zh) * 2018-12-13 2019-10-22 深圳市悦目光学器件有限公司 一种提高效益的喷涂镀膜设备

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