• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System and method of molding metal parts that is characterized in that it comprises a first metal structure (4), joined together with a rotary machine; and wherein said structure (4) is associated with a cover (3) and with a plurality of fastening elements (1, 2); and where, in turn, the structure (4) is solidly joined to a cylindrical metal shell (5) that houses inside, a ceramic mold (7) and a hardened sand (6) for the filling of the shell (5). ). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2568695A1
    申请号:ES201431450
    申请日:2014-10-02
    公开日:2016-05-03
    发明作者:Unai LARREA LOPEZ
    申请人:Ampo S Coop；
    IPC主号:
    专利说明:

    5
    10
    fifteen
    twenty
    25
    30
    35
    DESCRIPTION
    The present invention has as its object a system and method of molding metal parts, whose main advantage lies in the use of a shell whose mechanical properties are high enough to withstand the demands of centrifugal molding of large-sized parts
    Background of the invention
    At present, when obtaining metal foundries, there are several methods known in the state of the art that grant this purpose, such as sand molding, ceramic molding, spin casting, etc. but these means have several drawbacks, especially when it comes to serial production of different parts and their associated economic cost, as well as the need to have several molds for difficult storage.
    For example, sand molding has the main drawback of its low versatility in terms of design, which is a great limitation when manufacturing parts with a high degree of specification. This type of molding also has the additional disadvantage of needing a wooden model on which to achieve the sand mold of the piece to be manufactured, which implies that the wooden model will be permanent, which requires a certain storage space, and also needs to be materialized with a partition line, that is, it needs to be manufactured in two parts.
    In addition, we must consider the possibility of intrusions of sand in the piece, that we must trim the leftovers, etc. Therefore, this method generates an important extra cost when deciding as a means of manufacturing parts.
    Another example known in the state of the art is the use of a ceramic mold, which uses polystyrene molds injected on an aluminum mold or the like, which avoids having to store the molds once they have been used, giving more effective solutions in machining and molding of unit parts.
    5
    10
    fifteen
    twenty
    25
    30
    Once the polystyrene mold is obtained, a ceramics stage begins, where the polystyrene mold is impregnated with ceramic material, to be subsequently dried at a certain temperature, said operation can be repeated as many times as necessary, depending on the specific needs for the manufacture of the piece.
    As for centrifugal casting, it is generally used to melt revolution pieces of simple geometry (such as balls, tubes, etc ...) through the use of metal shells, and has countless advantages, among which the to reduce the possible volumetric defects that appear during the smelting, it is not necessary to carry out any process of elimination of surpluses and energetically it is a more efficient process than the rest of the processes mentioned, but at the same time it has the main drawback, of its low versatility when producing pieces with more complex geometries.
    An example of methods for obtaining parts from molds is the international application WO9717150 which describes a method of preparing a carcass mold for the molding of hollow pieces, where a layer is deposited on a pattern of polymeric material of elastic and deformable character of refractory material. In this way, it is possible to construct a shell or shell that reproduces a negative of the pattern of the elastic mold. Said mold will be removed once that refractory layer is deposited based on its deformity, due to its elastic properties. Subsequently, the steel casting in said housing together with the centrifugation will allow to reproduce the hollow piece that was initially intended to be molded.
    Description of the invention
    The technical problem that solves the present invention is to make a shell whose mechanical properties are high enough to withstand the demands of centrifugal molding of large-sized pieces. For this, the system and method of molding metal parts, object of the present invention comprises a first structure or base of a metallic character, jointly and severally connected to a rotating machine, which rotates the assembly at high speed, and where said structure is associated to a cover and a plurality of studs and fastening nuts, and where in turn, the structure is jointly and severally attached to a metal shell
    5
    10
    fifteen
    twenty
    25
    30
    35
    cylindrical housing inside, a ceramic mold and a hardened sand for filling said shell.
    Thanks to the method and system presented here, high quality parts can be obtained, with a low level of internal defects and / or impurities, and which do not have volumetric defects. In addition, pieces of great versatility can be obtained, since with the use of this procedure the design of the pieces is not limited.
    Once they have been used, the coquillas used can be reused for the manufacture of other pieces, simply by painting it with ceramic materials, so that the costs associated with the mold will be reduced, and therefore, the manufacture of The pieces.
    In the same way, the liquid contraction will be compensated with the material that is propelled outwards, by centrifugal force, so that the incorporation of feeding systems that increase the economic cost of the realization of the piece is avoided, and that Subsequently, they imply the process of cutting impurities that further increase the economic cost of the manufacturing process of the piece.
    Throughout the description and the claims the word "comprises" and its variants are not intended to exclude other technical characteristics, additives, components or steps. For those skilled in the art, other objects, advantages and characteristics of the invention will be derived partly from the description and partly from the practice of the invention. The following examples and drawings are provided by way of illustration, and are not intended to restrict the present invention. In addition, the present invention covers all possible combinations of particular and preferred embodiments indicated herein.
    Brief description of the figures
    A series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention that is presented as a non-limiting example of this is described very briefly below.
    FIG 1. Shows a view of a practical embodiment of the metal parts molding system, object of the present invention.
    5
    10
    fifteen
    twenty
    25
    30
    Preferred Embodiment of the Invention
    A preferred embodiment of the invention is shown in the attached figures. More specifically, it comprises a first structure or base (4) of a metallic character, joined in solidarity with a rotating machine, which rotates the assembly at high speed, and where said structure (4) is associated with a cover (3) and a plurality of asparagus (2) and fastening nuts (1), and where, in turn, the structure is jointly joined to a cylindrical metal shell (5) that houses inside, a ceramic mold (7) and a hardened sand (6) for filling the shell (5).
    The process of molding ceramic pieces consists of:
    i) in a first stage, a polystyrene model of the piece to be manufactured is manufactured; Said model can be manufactured by injecting polystyrene onto an aluminum model, in case of manufacturing series of pieces, or by machining a polystyrene block from a polystyrene block for the manufacture of unit parts.
    ii) in a second stage, the polystyrene model is introduced into a liquid ceramic mixture of "Milled Zircon ®" (zirconium sand) and "Primcote®" (a binder) until it is well impregnated.
    iii) in a third stage, the model is coated by impregnating a layer of zirconium sand.
    iv) subsequently, the obtained part is introduced, in a drying oven for approximately thirty minutes at 30 ° C.
    v) then, after removing the piece from the oven, a liquid layer of a ceramic mixture composed of "Fascote Binder ®" (silica binder) and "Fascote Refractary ®" (silicon dioxide) is applied.
    vi) the piece is covered with a "Molochite ®" ceramic material (caolln).
    vii) the piece is introduced in a drying oven for approximately forty-five minutes at a temperature of 50 ° C.
    viii) steps vi) and vii) are repeated until the piece has a ceramic thickness of between 10 and 15 millimeters.
    ix) the piece is introduced into a burn oven, for approximately one hour at a temperature of 1050 ° C, so that the polystyrene is volatilized and the ceramic mold (7) is obtained.
    x) the mold (7) is attached to the shell (5) inside it, and hardened sand (6) is added.
    xi) the structure or base (4) is tied to the centrifuge machine and the molten metal is cast, at a variable speed depending on the particular needs of each
    5 piece, obtaining the final metal piece.
    权利要求:
    Claims (2)
    [1]
    5
    10
    fifteen
    twenty
    25
    30
    1. - System of molding of metal parts that is characterized in that it comprises a first metal structure (4), jointly and severally connected to a rotating machine; and where said structure (4) is associated with a cover (3) and a plurality of fasteners (1,2); and where, in turn, the structure (4) is jointly and severally joined to a cylindrical metal shell (5) that houses inside, a ceramic mold (7) and a hardened sand (6) for filling the shell (5 ).
    [2]
    2. - Method of molding metal parts that is implemented in the system of claim 1 characterized in that it comprises the steps of:
    a) manufacture a polystyrene model of a metal part;
    b) introduce the polystyrene model in a liquid mixture of zirconium sand and
    binder;
    c) batter the polystyrene model in zirconium sand;
    d) insert the piece in a drying oven for approximately thirty minutes at 30 ° C;
    e) applying a liquid layer of a mixture of silica binder and silica dioxide;
    f) the piece is coated with caolln;
    g) the piece is introduced in a drying oven for approximately 45 minutes at 50 ° C;
    h) steps f) and g) are repeated until the piece has a ceramic thickness of between 10 and 15 millimeters;
    i) the piece is introduced into a burning oven, for about an hour at a temperature of 1050 ° C, until the polystyrene is volatilized and the ceramic mold (7) is obtained;
    j) the mold (7) is attached to the shell (5) therein, and hardened sand (6) is added; Y
    k) the shell (5) is attached to the structure or base (4) to the centrifuge machine and the molten material is cast.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4499940A|1985-02-19|Casting process including making and using an elastomeric pattern
    US6019927A|2000-02-01|Method of casting a complex metal part
    US20140034262A1|2014-02-06|Method of manufacturing rotor such as impeller or turbine wheel
    US20070187858A1|2007-08-16|Method for producing open-pored components made of metal, plastic, or ceramic
    CN206643301U|2017-11-17|A kind of casting moulds for being used to manufacture electric machine casing
    ES2568695B2|2017-04-11|System and method of molding metal parts
    US3157924A|1964-11-24|Method of casting
    JP2012515095A5|2012-11-22|
    KR20150024517A|2015-03-09|Lost foam pattern casting method
    CN104475684A|2015-04-01|Casting technology of complex shell part
    US5247984A|1993-09-28|Process to prepare a pattern for metal castings
    ES2233210B1|2006-09-01|PROCEDURE OF MANUFACTURE OF EMPLOYED QUICK MOLDS FOR TRANSFORMATION OF PLASTIC AND MOLD AS GOT.
    EP0625386B1|2000-01-26|An investment casting process for producing castings
    CN110328333A|2019-10-15|A kind of production method of layback mould wheel hub
    BRPI0621379A2|2011-12-06|composite casting core and casting method using said core
    CN109676087A|2019-04-26|A kind of casting technique for using shot to cover rouge sand shell core rotor as charges production
    JP4374575B2|2009-12-02|Drying, dewaxing and firing methods for precision casting plaster molds
    US3404724A|1968-10-08|Method of casting in a shell molding
    JP2020504012A|2020-02-06|Cluster model and shell and associated method for obtaining accessories for independent handling of molded parts
    TWI695747B|2020-06-11|Precision casting process capable of accelerating heat dissipation of concave part of shell mold
    JPH09136140A|1997-05-27|Method for investment casting for manufacturing cast articlewith reinforced surface finishing
    TW202019580A|2020-06-01|Precise casting process with a supporting step for shell mold recess placing a supporting member into the recess of the shell mold to reduce the occurrence of the mold swell
    Deore et al.2015|A study Of Core And Its Types For Casting Process
    US9969035B2|2018-05-15|Method for producing a turbine engine part, and resulting mould and intermediate blank
    JPS5680345A|1981-07-01|Production of mold
    同族专利:
    公开号 | 公开日
    EP3202510A1|2017-08-09|
    WO2016050995A1|2016-04-07|
    US10335852B2|2019-07-02|
    EP3202510B1|2020-08-05|
    ES2568695B2|2017-04-11|
    CN107041130A|2017-08-11|
    US20170282242A1|2017-10-05|
    CN107041130B|2019-03-08|
    EP3202510A4|2018-05-30|
    ES2825648T3|2021-05-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB467399A|1936-10-21|1937-06-16|Hans Breitbart|Device for the production of centrifugal castings|
    GB815181A|1956-03-12|1959-06-17|Arno Lindner|Method and apparatus for centrifugally casting metals or the like|
    US3296666A|1965-08-23|1967-01-10|Howmet Corp|Method of preparing an investment mold for use in precision casting|
    GB1221983A|1967-08-08|1971-02-10|Rheinstahl Huettenwerke Ag|Improvements in centrifugal casting moulds|
    SU839672A1|1979-09-07|1981-06-23|Научно-Исследовательский Институтспециальных Способов Литья|Apparatus for centrifugal casting|
    US4316498A|1980-01-18|1982-02-23|Precision Metalsmiths, Inc.|Investment shell molding materials and processes|
    US4655276A|1986-06-02|1987-04-07|Stainless Foundry & Engineering, Inc.|Method of investment casting employing microwave susceptible material|
    CN1038567C|1994-12-31|1998-06-03|冶金工业部钢铁研究总院|Centrifugal casting box paint|
    GB9522741D0|1995-11-07|1996-01-10|Firth Vickers Centrispinning L|Making a metal shape by casting|
    US5980792A|1996-09-04|1999-11-09|Chamlee; Thomas C.|Particulate field distributions in centrifugally cast composites|
    US8033320B2|2008-07-25|2011-10-11|General Electric Company|High emittance shell molds for directional casting|
    AT533579T|2009-04-30|2011-12-15|Evonik Degussa Gmbh|DISPERSION, TIP AND METHOD FOR PRODUCING A DIE FOR PRECISION CASTING USING THE TAPER|
    CN104884190B|2013-01-10|2016-11-23|株式会社Ihi|Centrifugal casting equipment|CN107282909A|2017-08-25|2017-10-24|贵州安吉航空精密铸造有限责任公司|A kind of running gate system and centre spinning method for tube shape component|
    法律状态:
    2017-04-11| FG2A| Definitive protection|Ref document number: 2568695 Country of ref document: ES Kind code of ref document: B2 Effective date: 20170411 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201431450A|ES2568695B2|2014-10-02|2014-10-02|System and method of molding metal parts|ES201431450A| ES2568695B2|2014-10-02|2014-10-02|System and method of molding metal parts|
    CN201580051255.3A| CN107041130B|2014-10-02|2015-07-01|System and method for molded metal part|
    US15/509,298| US10335852B2|2014-10-02|2015-07-01|System and method for moulding metal parts|
    ES15846198T| ES2825648T3|2014-10-02|2015-07-01|Metal parts molding method|
    PCT/ES2015/070513| WO2016050995A1|2014-10-02|2015-07-01|System and method for moulding metal parts|
    EP15846198.8A| EP3202510B1|2014-10-02|2015-07-01|Method for moulding metal parts|
    [返回顶部]