EP3427859A1 - Noyau de coulée pour une armature sanitaire et armature sanitaire - Google Patents

Noyau de coulée pour une armature sanitaire et armature sanitaire Download PDF

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Publication number
EP3427859A1
EP3427859A1 EP18181444.3A EP18181444A EP3427859A1 EP 3427859 A1 EP3427859 A1 EP 3427859A1 EP 18181444 A EP18181444 A EP 18181444A EP 3427859 A1 EP3427859 A1 EP 3427859A1
Authority
EP
European Patent Office
Prior art keywords
shell part
casting
housing
inner shell
casting core
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
EP18181444.3A
Other languages
German (de)
English (en)
Inventor
Hartwig Philipps
Torsten Meier
Waldemar Gaida
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.)
Grohe AG
Original Assignee
Grohe AG
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 Grohe AG filed Critical Grohe AG
Publication of EP3427859A1 publication Critical patent/EP3427859A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/105—Salt cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0045—Casting in, on, or around objects which form part of the product household utensils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/04—Water-basin installations specially adapted to wash-basins or baths

Definitions

  • the invention relates to a casting core for a sanitary fitting and a sanitary fitting and a method for their preparation.
  • the sanitary fitting is in particular a water outlet, which can be used for example in showers, bathtubs, washbasins and the like.
  • the design requirements for such sanitary fittings follow a variety of requirements, which can be associated in particular with a relatively complex outer shape of the sanitary fitting.
  • the manufacturing process with ever more complicated internal structures, waterways, etc. and hygiene regulations high demands on the manufacturing process.
  • this should nevertheless be highly process-reliable and cost-effective.
  • Housings for sanitary fittings can be manufactured as die-cast components.
  • casting cores can be used for the production of the housing.
  • a variety of different types of casting cores has been proposed with which the interior is to be formed. It has been proposed, for example, to use casting cores, which are dissolved out after the completion of the die-cast component, for example thermally, catalytically and / or by dissolution of the die-cast component (lost casting core). As a material for such lost cores, for example, foundry sand was used. It is also already known to use a so-called permanent core casting as casting for casting a water outlet fitting, which remains after the manufacturing process in the cast component.
  • the permanent core for example, provide a water supply in the sanitary fitting.
  • a permanent core is formed of several sections that are joined together. It is also known to select a permanent core formed with a plastic material, the melting point of which may also be below the melting point of the casting material.
  • the casting core releasing material can contaminate the casting tool, which can lead to surface defects on the die-cast components or the housing.
  • an interface to the functional elements of the sanitary fitting has to be reworked.
  • the lower melting point plastic core may require very complex process control of the die casting process to match internal pressure and melt pressure.
  • a casting core is to be specified, with which a large number of different design variants for sanitary fittings can be produced cost-effectively.
  • the casting core should in particular be configured as a permanent core and finally serve for water guidance.
  • the casting core in particular a possible precise, especially very thin-walled, design of the housing of the sanitary fitting allow.
  • a production-ready production of fittings bodies made of non-ferrous metals to be made possible.
  • a casting core for a sanitary fitting contributes, which comprises a composite of at least one outer shell part, and at least one inner shell part.
  • the at least one outer shell part is formed with a water-soluble material.
  • the at least one inner shell part is formed with a non-water-soluble material.
  • the casting core is, in particular, an independent, dimensionally stable body which can be transported and treated separately.
  • the casting core can essentially comprise two different material components that are connected to one another.
  • the casting core may comprise an outer shell part or a plurality of outer shell parts.
  • An outer shell part delimits in particular a part of the outer surface of the casting core.
  • the at least one outer shell part comprises or consists of a water-soluble material.
  • Water-soluble in this context means, in particular, that at least part of the material of the outer shell part is soluble in water, which in particular damages the structural integrity or the cohesion of the material or of the outer shell part or destroyed.
  • the outer shell part in (direct) contact with water, the outer shell part can change or reduce its shape and / or its volume.
  • the casting core may comprise an inner shell part or a plurality of inner shell parts.
  • the inner shell part delimits, at least in sections, in particular an inner cavity or a channel of the casting core.
  • the inner shell part is formed with a non-water-soluble material or it consists (exclusively) of such a non-water-soluble material.
  • Non-water-soluble is a material in particular if it is permanently suitable for the fluid conduction of water, in particular also taking into account existing hygiene regulations.
  • outer shell parts and / or a plurality of inner shell parts may each be formed with the same water-soluble or non-water-soluble material, but it is also possible that each different materials are provided in each case for the outer shell parts or the inner shell parts.
  • the bond between the at least one outer shell part and the at least one inner shell part is at least designed so that it allows or ensures trouble-free handling or trouble-free transport and / or later accurate insertion of the casting core into a casting tool.
  • the composite can be positive and / or cohesive. It is preferred that the composite of the casting core (prior to its use in a casting tool) comprises only the components outer shell part and inner shell part.
  • the casting core can be designed so that the at least one outer shell part is formed with a salt.
  • the salt can be pressed into a specific shape and / or maintained by means of a binder a desired shape.
  • the salt may for example be based on potassium chloride (KCl) or sodium chloride (NaCl). It is possible to use so-called composite salts for example, by incorporation of ceramic oxide or metal oxide (eg ZrSiO 4 , Al 2 O 3 , SiO 2 , Fe 2 O 3 ).
  • the at least one inner shell part may define or form at least one cavity or at least one channel of a water-conducting section. If the casting core has a cavity which has no fluidic access to the external environment, this is referred to as a cavity. Is such an access to the environment, can be spoken by a channel.
  • An inner shell part or several / all inner shell parts may serve to delimit or form at least one such cavity and / or channel (partially or completely). It is preferred that a cavity or a channel, as far as it is formed in the casting core, is exclusively formed by at least one inner shell part, as far as this is to serve subsequently to the water supply.
  • the at least one inner shell part is formed with plastic.
  • plastics such as fibers, particles or the like (possibly also from a non-plastic material). It is preferred that an inner shell part is formed exclusively from such a plastic.
  • the at least one inner shell part may have at least one outer pocket, in which at least one outer shell part is received. It can be provided that the inner shell part radially inwardly delimits a cavity and / or a channel at least partially, and on the opposite side radially outside at least one pocket is provided in which engages at least one outer shell part or in which an outer shell part is at least partially applied.
  • a bag can be designed, for example, in the manner of a groove, a groove, a dent or the like.
  • the pocket may be bounded or enclosed by protruding material regions of the inner shell part. You can do this be configured with the inner shell part ribs, knobs, wall sections or the like. It is possible that an outer shell part is completely received in an outer pocket.
  • an outer shell part extends at least partially radially beyond the outer boundary of the pocket. It is possible that a single outer shell part is accommodated in a plurality of pockets or extends into a plurality of pockets. It is possible to carry out an inner shell part and / or a plurality of inner shell parts with one and / or more pockets.
  • step B) before step A), so that the channel is already formed in the casting core and is positioned such that it is finally aligned towards the housing opening of the housing.
  • the sanitary fitting is in particular a water outlet fitting.
  • the housing may be made with an alloy comprising zinc, magnesium and / or aluminum.
  • the wall thickness of the metallic housing may, for example, in the range of 0.1 to 5.0 mm, in particular in the range of 2.0 to 3.5 mm.
  • the housing volume enclosed by the metallic housing preferably consists of at least 80%, in particular at least 90% or even at least 95%, of the interior space, that is to say a space which is not filled by the metallic housing.
  • water pipes, valve assemblies, cartridges or the like and sensors, a control unit or the like can be accommodated.
  • the housing has at least two housing openings, in particular a housing opening for the inlet of water and a housing opening for the discharge of water. It may be provided at least one further housing opening, for example, to arrange adjusting elements for controlling the operation of the sanitary fitting, in particular with regard to the amount of water and / or the water temperature.
  • a casting tool which essentially images the outer contour or the outer surface of the desired housing.
  • the casting core is inserted, wherein in particular to the casting mold gaps are formed, in which then the (preferably metallic) flowable casting material can be poured.
  • the casting process which can be designed as gravity casting, low-pressure casting or die-casting, the casting material flows around the casting core. If the casting material has penetrated sufficiently into the intended gap between the casting core and the casting tool, the solidification process begins, so that the housing is then molded with the casting material.
  • the casting core and in particular an outer shell part may have a lower, a same or a higher melting point than the cast material of the housing.
  • the casting core (almost or completely unchanged and) can be captive enclosed. It is preferred that the at least one casting core the interior at least in the area of the water outlet and possibly also at least partially in the area of the base of the sanitary fitting fills.
  • the at least one inner shell part may support the casting material at least during step B) or step C).
  • the inner shell part contributes to the shaping of the housing.
  • At least one outer shell part is removed from the housing after step B). It is possible that one or all outer shell parts are removed (completely) from the housing after step B) or during / after step C) and / or during / after step C).
  • a sanitary fitting which comprises at least one housing with an interior, which is accessible via at least two housing openings.
  • a casting core is provided in the interior, which has a composite of at least one outer shell part, which is formed with a water-soluble material, and at least one inner shell part which is formed with a non-water-soluble material.
  • the casting core comprises at least one channel which is bounded or formed by at least one inner shell part and via which the at least two housing openings can be fluidly connected.
  • the housing may be formed with a (metallic) cast material comprising at least zinc, magnesium or aluminum.
  • An outer shell part may be formed with a salt.
  • An inner shell part may be formed with a plastic.
  • a casting core comprising a composite of at least one outer shell part, which is formed with a water-soluble material, and at least one inner shell part, which is formed with a non-water-soluble material, for shaping a housing and forming a channel as a section of a Waterway in a sanitary fitting.
  • Fig. 1 shows a casting core 1, which is essentially formed by a (single) inner shell part 5 of a non-water-soluble material 6.
  • the casting core 1 has a shape as required by a desired sanitary fitting or its housing. Thus, on the right, a somewhat more solid base 17 may be formed, from which an outlet 16 extends laterally (left).
  • a channel 8 and a cavity 7 are formed in the inner part 5.
  • a (single, closed) outer shell part 3 is formed of a water-soluble material 4.
  • the outer shell part 3 can be designed, for example, similar to a coating.
  • Outer shell part 3 and inner shell part 5 together form a composite 15 which can be handled separately.
  • Fig. 2 illustrates in cross-section through an outlet 16, a further configuration of inner shell part 5 and outer shell parts 3.
  • Central here is the channel 8 can be seen, which is completely enclosed in the circumferential direction 23 of the (single) inner shell part 5.
  • a plurality of pockets 9 are formed with the inner shell part 5, which are spaced from each other by means of longitudinal ribs 22 from each other.
  • each of the water-soluble material 4 of the outer shell part 3 is arranged.
  • the outer surface 18 here in the circumferential direction 23 in sections or alternately formed by a plurality of outer shell parts 3 and the inner shell part 5.
  • Fig. 3 shows a composite 15 of inner shell parts 5 and outer shell parts 3.
  • two inner shell parts 5 are provided, which are joined together, wherein a first inner shell part 5, the base 17 and a second inner shell part 5 forms the outlet 16.
  • the inner shell part 5 which forms the outlet 16 at least partially, equipped with one or more outer shell parts 3 or connected.
  • the inner shell part 5 may be formed with pockets 9, wherein a (single) outer shell part 3 extend over several pockets 9 away and / or at least partially (alone) can form the outer surface 18 of the casting core 1.
  • Opposite pockets 9 are formed, which are limited in the longitudinal direction 24, so only extend over a portion of the extension of the outlet 16 in the longitudinal direction 24.
  • Fig. 4 illustrates how the casting core 1 is inserted in the casting tool 13, for example, to realize a metal die-casting process.
  • Sliders 26 may be provided which engage in cavities 7 or a channel 8 of the casting core.
  • the outer surface 18 adjacent to the casting tool 13 is limited exclusively with outer shell parts 3 and / or inner shell parts 5. Between this outer surface 18 and the casting tool 13, the casting material can be supplied to form the housing.
  • Fig. 5 illustrates a situation how the casting core 1 can be configured after performing a casting process.
  • the casting process encloses the housing 10 of the (solidified) casting material 14, the casting core 1. It is possible that the housing 10 is at least partially still with an outer shell part 3 in contact and is supported by this. Next can be realized by the slide that directly on the housing 10 a plurality of housing openings 12 are formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP18181444.3A 2017-07-12 2018-07-03 Noyau de coulée pour une armature sanitaire et armature sanitaire Pending EP3427859A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017115685.2A DE102017115685A1 (de) 2017-07-12 2017-07-12 Gießkern für eine Sanitärarmatur und Sanitärarmatur

Publications (1)

Publication Number Publication Date
EP3427859A1 true EP3427859A1 (fr) 2019-01-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18181444.3A Pending EP3427859A1 (fr) 2017-07-12 2018-07-03 Noyau de coulée pour une armature sanitaire et armature sanitaire

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EP (1) EP3427859A1 (fr)
DE (1) DE102017115685A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021102891A1 (de) 2021-02-08 2022-08-11 Grohe Ag Verfahren zur Herstellung eines Gehäuses einer Sanitärarmatur sowie Gehäuse für eine Sanitärarmatur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1293276A2 (fr) * 2001-09-18 2003-03-19 DaimlerChrysler AG Appareil pour fabriquer de pièces coulées sous pression avec un noyau et un insert
US20030062088A1 (en) * 2001-10-02 2003-04-03 Frank Perla Water delivery device and method of forming same
EP2033721A1 (fr) * 2007-08-08 2009-03-11 Grohe AG Procédé de fonte composite
DE102008002376A1 (de) * 2008-02-22 2009-08-27 Bühler Druckguss AG Verlorener Kern
US20130019976A1 (en) * 2011-07-20 2013-01-24 Gary Wu Faucet outlet structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013167210A1 (fr) * 2012-05-10 2013-11-14 HDO Druckguss- und Oberflächentechnik GmbH Élément moulé sous pression et procédé de production d'un élément moulé sous pression

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1293276A2 (fr) * 2001-09-18 2003-03-19 DaimlerChrysler AG Appareil pour fabriquer de pièces coulées sous pression avec un noyau et un insert
US20030062088A1 (en) * 2001-10-02 2003-04-03 Frank Perla Water delivery device and method of forming same
EP2033721A1 (fr) * 2007-08-08 2009-03-11 Grohe AG Procédé de fonte composite
DE102008002376A1 (de) * 2008-02-22 2009-08-27 Bühler Druckguss AG Verlorener Kern
US20130019976A1 (en) * 2011-07-20 2013-01-24 Gary Wu Faucet outlet structure

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Publication number Publication date
DE102017115685A1 (de) 2019-01-17

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