WO2010076346A1 - Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion - Google Patents

Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion Download PDF

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Publication number
WO2010076346A1
WO2010076346A1 PCT/ES2008/000814 ES2008000814W WO2010076346A1 WO 2010076346 A1 WO2010076346 A1 WO 2010076346A1 ES 2008000814 W ES2008000814 W ES 2008000814W WO 2010076346 A1 WO2010076346 A1 WO 2010076346A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductor
induction heating
techniques
microfusion
space
Prior art date
Application number
PCT/ES2008/000814
Other languages
English (en)
Spanish (es)
Inventor
Pedro MORATALLA MARTÍNEZ
Miguel Mezquida Gisbert
José JORDÁN MARTÍNEZ
Enrique DEDE GARCÍA-SANTAMARÍA
Manuel DURÁN SÁNCHEZ
Vicente ESTEVE GÓMEZ
Original Assignee
Gh Electrotermia, S.A.
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 Gh Electrotermia, S.A. filed Critical Gh Electrotermia, S.A.
Priority to PCT/ES2008/000814 priority Critical patent/WO2010076346A1/fr
Priority to EP08879272.6A priority patent/EP2371467A4/fr
Publication of WO2010076346A1 publication Critical patent/WO2010076346A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C22C5/08—Alloys based on silver with copper as the next major constituent

Definitions

  • the present invention refers to a method of manufacturing induction heating inductors using the MICROFUSION techniques.
  • the first of the improvements consists in the use of a data storage system to keep both the physical and mechanical characteristics of the inductor, in this way it is possible to reproduce exactly the same new inductors, which optimizes the inductor replacement processes for processes in those that are made hundreds of thousands of pieces.
  • the second of the improvements consists in the use of the appropriate highly conductive metal alloy, to minimize the losses in the inductor and thereby increase the half-life of the inductor, being able to double with respect to the inductors made by pure copper and welding silver.
  • the third of the improvements consists in the use of three-dimensional planes to optimize the inductors and reduce the points of higher current density by modifying their geometric characteristics, through small modifications in the planes, the durability of the inductors is achieved increase, by eliminating hot spots in it.
  • the fourth of the improvements consists in the design of the interior of the inductor, through which the refrigeration circulates, being able to increase the flow rate compared to those made with a copper tube, or increase the thickness of the inductor wall where it is convenient.
  • a MICROFUSION method has been used for some time to obtain jewelry pieces. This method consists of filling a noble material with molds for the realization of these pieces of jewelry. For the realization of the molds, an initial wax mold is usually used, which is usually made by hand. The materials used in jewelry pieces are usually gold, silver, etc. The functionality of the pieces made by MICROFUSION is only for ornaments, and no 1 must have any electrical requirements.
  • the present invention consists in the realization of a certain number of steps which result in obtaining a certain inductor for induction heating.
  • the first step, element 1 of Figure 1 consists in the generation in one or several two-dimensional planes, with the physical exterior characteristics of the heating inductor. In this step it is taken into account which will be the part that will be in the vicinity of the piece to be treated. This initial design will be determined by, previous experiences, by simulations performed with appropriate tools for this purpose, etc.
  • the second step, element 2 of Figure 1 consists in the generation of a three-dimensional plane, which meets the characteristics determined by the initial planes.
  • This three-dimensional plane contains both the face and exterior of the inductor, as well as the interior of the inductor, where the cooling water of the inductor will circulate.
  • both the electrical connections (1) of the inductor and the connections for the cooling water (2) will be drawn.
  • the three-dimensional plan must contain all the information of the inductor model, since on this plane both the electrical or cooling improvements will be made, as well as the possible future modifications that will be carried out in new versions of the inductor.
  • this plan has to be carried out on a data storage medium where the information of the inductor is stored for the realization of replicas in addition to having communication capacity with a wax layer printing printer.
  • the first space is determined by the interior parts (4) of the inductor (through which the cooling circulates)
  • the second of the spaces is formed by the body (5) of the inductor (the walls of the tube)
  • the third space is formed by the outer part of the inductor (corresponds to the areas where no operation is necessary).
  • the use of areas that communicate with the third of the spaces is necessary.
  • These communication zones have to be in places where high current density does not circulate, since they can produce unwanted interfaces. It is also necessary to design some drinking fountains or flasks so that they can be used for filling the alloys, as well as for the coating of the first of the spaces.
  • the third step, element 3 of Figure 1 consists in the deposition of thin layers of wax that form on one another the three-dimensional model defined in the second step.
  • two waxes of different melting temperature are used for the formation of the first of the spaces defined in the second step (the inner hollow of the inductor through which the cooling water circulates).
  • the wax whose melting temperature is higher (9) is used to form the inductor body.
  • This third step has to be performed with specific wax layer deposition machines.
  • the mechanical characteristics of the wax must be such that it allows a completely rigid three-dimensional model. In the case of inductors of small dimensions, it is necessary to define in the second step connecting parts of the weakest areas. These junction zones will be eliminated in the last process of the inductor machining.
  • the fourth step, element 4 of Figure 1 is intended to fill the inductor body of the optimum alloy for use in induction heating.
  • This step is divided into two main parts.
  • the model obtained in the third step is subjected to a temperature slightly higher than the melting temperature of the wax of the first of the spaces (the wax with the lowest melting temperature).
  • this wax is liquid, it is evacuated by gravity, and the space it contained (first space) is filled with a high fluid ceramic coating, so that all the holes in this space are filled.
  • the piece is introduced in an oven at the controlled temperature and humidity so that the ceramic coating can dry out.
  • the second part of this fourth step consists in introducing the three-dimensional model of the third step into a mold whose dimensions are between 0.1 mm and 500 mm, preferably between 1 mm and 50 mm and more preferably between 20 mm and 30 mm greater than inductor dimensions.
  • the mold that contains the inductor and whose inside is also ceramic coated is filled with ceramic coating. It is important to leave connections called nozzles (3) that allow the ceramic lining of the outer mold to be attached to the ceramic lining of the inner part (the first part of the fourth step).
  • this second coating to set properly it is also necessary to control its temperature and humidity in the oven. Once the ceramic coating has set, the oven temperature is increased until the melting temperature of the wax with the highest melting point is exceeded.
  • the wax that occupied the second space in a liquid state is extracted in a vacuum oven leaving the entire inductor body hollow.
  • This final mold is introduced into a Microfusion oven with centrifugal movement and is filled with the appropriate alloy that allows high conductivity and avoids pores.
  • the filling alloy is formed by any element of high conductivity or combination of elements whose result has high conductivity, preferably the combination of 75% silver and 25% copper, with a variation of these proportions up to a maximum of 10 % and preferably up to a maximum of 5%.
  • the fifth step, element 5 of Figure 1 consists in breaking the ceramic part of the mold and removing the inductor from its interior. Mechanical methods are used to remove the mold from the third space, breaking the ceramic coating.
  • the method of manufacturing inductors of the present invention allows the steps to be copied to obtain copies of the same inductor, element 6 of Figure 1, or to introduce improvements in the inductor, element 7 of Figure 1 .
  • Figure 1 Represents the diagram of the different steps of the method used in the manufacture of the heating inductor with MICROFUSION techniques, as well as the steps of optimization, copying or improvement of said inductors.
  • Figure 2. Represents an example of the two-dimensional plane defined in the first step of the present invention.
  • Figure 3. Represents the three-dimensional plane defined in the second step of the present invention.
  • Figure 4. Sample of the inductor made by the deposition techniques of thin layers of wax, defined in the present invention.
  • Figure 5. Shows the mold before being introduced into the MICROFUSION centrifugal oven.
  • Figure 6. Shows the induction heating inductor when it was completely finished. DESCRIPTION OF AN EXAMPLE OF EMBODIMENT OF THE INVENTION Next, the description of an example of the manufacture of an inductor will be carried out by the method described in the invention.
  • the layer printer After generating the plane in three dimensions, the layer printer reproduces the model in three dimensions by deposition of thin layers of wax with at least two types of waxes with different melting temperatures, Figure 4. These layers define the first, second and third space that corresponds to the interior (4), body (5) and exterior (6) spaces of the inductor respectively.
  • the wax (8) with a lower melting temperature is used, while for the realization of the second space of the inductor, the wax (9) with a higher melting temperature is used.
  • the first space of the inductor is then emptied by subjecting the inductor to a temperature higher than the melting temperature of the wax with lower melting temperature (8) and lower than the melting temperature of the wax with higher melting temperature ( 9), after which the lowest temperature wax is evacuated by gravity.
  • the first space of the inductor is filled by a high fluid ceramic coating, where the drying process is carried out by means of the introduction in a furnace at controlled temperature and humidity.
  • the inductor is then introduced into a mold consisting of two parts (11,12), figure 5, to facilitate the introduction of the inductor into the mold and an upper hole (10) to facilitate the entry of both the cladding and the alloy.
  • Said mold has dimensions 25 mm greater than the external dimensions of the inductor.
  • the mold containing the inductor is filled with a high fluidity coating, after which it is placed in an oven at controlled temperature and humidity for drying the ceramic coating. Joints are made between the lining of the first inductor space and the lining of the outer mold containing the inductor, and then the lining is dried.
  • the oven temperature is increased to exceed the melting point of the wax with the highest (9) melting temperature and which forms the inductor body, and then the wax is extracted in a vacuum oven, so that it is emptied The second space of the inductor.
  • the mold is filled with a high conductivity alloy of 75% silver and 25% copper by introducing it into a Microfusion furnace with centrifugal movement forming the inductor body. The alloy is allowed to dry. Finally, the mold is demoulded by mechanical and chemical methods. Understanding the mechanics of the inductor and the chemical pickling agents within the mechanical methods. After which the final inductor (7) is obtained, figure 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Induction Heating (AREA)

Abstract

La présente invention concerne un procédé comprenant les étapes permettant la réalisation d'un inducteur de chauffage par induction. Le procédé consiste d'abord à générer les plans de l'inducteur en deux dimensions, des plans en trois dimensions seront générés ultérieurement, lesquels plans sont conçus de manière à pouvoir être compris par un système de dépôt de cire. Ensuite, le procédé consiste à générer, grâce à au dépôt de cire, un modèle d'inducteur en deux étapes qui permettent de façonner l'intérieur et le corps de l'inducteur, respectivement. Un moule est ensuite réalisé qui présente la forme extérieure de l'inducteur et des dimensions supérieures à celles de l'inducteur. Le modèle de l'inducteur est introduit dans le moule. Le moule est rempli à l'aide d'un alliage de conductivité élevée puis introduit dans un four de microfusion. Une fois séché dans le four, le moule est démoulé au moyen de mécanismes physiques et de décapants chimiques afin d'obtenir l'inducteur.
PCT/ES2008/000814 2008-12-30 2008-12-30 Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion WO2010076346A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/ES2008/000814 WO2010076346A1 (fr) 2008-12-30 2008-12-30 Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion
EP08879272.6A EP2371467A4 (fr) 2008-12-30 2008-12-30 Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2008/000814 WO2010076346A1 (fr) 2008-12-30 2008-12-30 Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion

Publications (1)

Publication Number Publication Date
WO2010076346A1 true WO2010076346A1 (fr) 2010-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2008/000814 WO2010076346A1 (fr) 2008-12-30 2008-12-30 Procédé de fabrication d'inducteurs de chauffage par induction au moyen de techniques de microfusion

Country Status (2)

Country Link
EP (1) EP2371467A4 (fr)
WO (1) WO2010076346A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10321361A (ja) * 1997-05-19 1998-12-04 Kokusai Electric Co Ltd 高周波誘導加熱コイル、半導体製造装置、および高周波誘導加熱コイルの製造方法
JPH1126149A (ja) * 1997-06-30 1999-01-29 Honda Motor Co Ltd 高周波誘導加熱コイルおよびその製造方法
JP2001279320A (ja) * 2000-03-28 2001-10-10 High Frequency Heattreat Co Ltd 誘導加熱コイル及び高周波焼入方法
JP2007114062A (ja) * 2005-10-20 2007-05-10 Honda Motor Co Ltd 誘導加熱コイルおよびその製造方法、並びに高周波加熱装置
JP2008091197A (ja) * 2006-10-02 2008-04-17 Sansha Electric Mfg Co Ltd 誘導加熱コイル及び誘導加熱コイルの製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO854531L (no) * 1984-11-19 1986-05-20 Aluminum Co Of America Varmefast induktorblokk for kanalinduksjonsovn og fremgangsmaate til fremstilling av samme.
US5121329A (en) * 1989-10-30 1992-06-09 Stratasys, Inc. Apparatus and method for creating three-dimensional objects
US5518060A (en) * 1994-01-25 1996-05-21 Brunswick Corporation Method of producing polymeric patterns for use in evaporable foam casting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10321361A (ja) * 1997-05-19 1998-12-04 Kokusai Electric Co Ltd 高周波誘導加熱コイル、半導体製造装置、および高周波誘導加熱コイルの製造方法
JPH1126149A (ja) * 1997-06-30 1999-01-29 Honda Motor Co Ltd 高周波誘導加熱コイルおよびその製造方法
JP2001279320A (ja) * 2000-03-28 2001-10-10 High Frequency Heattreat Co Ltd 誘導加熱コイル及び高周波焼入方法
JP2007114062A (ja) * 2005-10-20 2007-05-10 Honda Motor Co Ltd 誘導加熱コイルおよびその製造方法、並びに高周波加熱装置
JP2008091197A (ja) * 2006-10-02 2008-04-17 Sansha Electric Mfg Co Ltd 誘導加熱コイル及び誘導加熱コイルの製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2371467A4 *

Also Published As

Publication number Publication date
EP2371467A1 (fr) 2011-10-05
EP2371467A4 (fr) 2017-08-02

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