Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
  • B22C9/088—Feeder heads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
  • B22C9/084—Breaker cores

Definitions

• the present invention relates to a feeder element for use in casting metals in molds having a first end for placement on a mold model and an opposed second end for connection to or for supporting an upper riser, the feeder element extending from the first to the second end Passage for liquid metal possesses.
• the invention also relates to a feeder insert for use in casting metals in molds, having a cavity for receiving liquid metal, comprising or consisting of a feeder element according to the invention and an upper feeder part. Further aspects of the invention relate to kits for producing a feeder element according to the invention or a feeder insert according to the invention and to methods for arranging a feeder insert in a casting mold. Further aspects of the invention will become apparent from the following description and the appended claims.
• Feeder elements of the type mentioned are known from the prior art.
• the object of the present invention is to develop a feeder element according to EP 1 184104 B1.
• the feeder elements (first mold elements) disclosed therein which are provided for supporting an upper feeder part (second mold element), have a first end for placement on mold models, the attachment surface of which in practice is felt to be too large in some cases.
• ever smaller surface areas (and shelves) are desired, as in the recent past the surfaces of castings have become increasingly filigree.
• the passage opening (passage opening) for liquid metal must not be arbitrarily small, otherwise an acceptable feeding behavior can not be achieved.
• a cooling of the feeder neck as it may occur in thin-walled design of a feeder element on its side facing the mold model, may not make disturbing.
• a feeder element for use in casting metals in molds having a first end for placement on a mold model and an opposed second end for connection to or for supporting an upper riser, wherein the feeder element has a liquid metal passage extending from the first end to the second end, the feed element being two or more parts and comprising or consisting of: (i) a tubular element forming the first end of the feeder element having a wall thickness of at most 1, 5 mm,
• an adapter element having an opening into which the tubular element is inserted so as to be frictionally connected to the adapter element, the adapter element comprising one or more travel limiters for limiting the insertion path for the tubular element, which are arranged such that the outer surface of the first end opposite the edge region of the tubular element is freely available at maximum wide insertion within the adapter element with its entire circumference or in portions of the circumference.
• a corresponding feeder insert according to the invention for use in casting metals in molds, having a cavity for receiving liquid metal comprises or consists of: a feeder element according to the invention (as just defined) and an upper feeder part.
• the feeder element according to the invention can advantageously be used as described in EP 1184104 B1 for the local "first molded element.”
• the upper feeder part of a feeder insert according to the invention corresponds to the "second molded element" according to EP 1 184104 B1.
• Food inserts, as described in EP 1184104 B1, are commercially available under the name “Telespeiser” from CHEMEX GmbH, Germany.
• the tubular element can be inserted into the adapter element to different extents.
• Such an arrangement is advantageous to prevent breakage of a feeder element according to the invention or a corresponding feeder insert according to the invention, as would otherwise be possible in the molding material compaction due to the then acting compression forces.
• a destruction of a feeder according to the invention is reliably prevented.
• the tube-like element can also be inserted as far as possible into the adapter element as soon as it is delivered, so that it is prevented from being pushed back by the path limiter or limiters.
• the adapter element forms the second end of the feeder element, that is, the end of the feeder element, which is intended for connection to or for supporting an upper feeder part.
• one or more intermediate elements can also be provided between the adapter element and the upper feeder part.
• the tubular element of a feeder element according to the invention is preferably cylindrical, but other configurations may be provided, for example rectangular tube cross-sections or tubular elements having a conical shape.
• the tubular member has a length in the range of 10 to 30 mm, especially if it is cylindrical.
• the tube-like element has a length in the range of 10 to 30 mm and is not inserted as far as possible in the delivery condition in the adapter element, it allows a further insertion of at least 4 mm in the state before the compression of the molding material. It has been found that in such an arrangement, the compression forces occurring during compression of the molding material can be effectively counteracted.
• the tubular member has a substantially uniform cross section over the entire length.
• the ratio of wall thickness to the total diameter of the tubular element is preferably over its entire length between about 1: 5 and 1: 120, more preferably in the range of 1:10 to 1: 100.
• the thickness of the tubular member is chosen by the skilled person to have sufficient stability and to withstand the crushing forces encountered in the molding material compaction.
• the tubular element is made of a material which is selected from the group consisting of: metallic, ceramic or plastic materials and composite materials based on metal, ceramic and / or plastic.
• the tubular element is preferably made of iron, an iron alloy such as steel, aluminum, an aluminum alloy, a brass alloy or ceramic.
• the adapter element is preferably made of an exothermic or insulating molding compound. The same applies in a feeder insert according to the invention for the upper feeder part.
• the adapter element of a feeder element usually has a wall or a wall section whose thickness is greater in sections or everywhere than the thickness of the tube-like element at the first end of the feeder element.
• a wall thickness of less than 1, 5 mm can not be produced with the required process reliability in the context of mass production.
• a feeder insert according to the invention advantageously resembles in its construction the feeder inserts as described in EP 1 184104 B1, wherein the components described there as "first form element” are replaced by a two- or multi-part feeder element according to the invention
• the content of EP 1 184104 B1 is incorporated by reference into the present text.
• the feeder element and the upper feeder part of a feeder insert according to the invention are arranged to be slidable into one another.
• the tubular element is preferably not pushed far into the adapter element, so that it can be further inserted into the adapter element until it is prevented by the Wegbegrenzern or at a further insertion ,
• the compression forces occurring during the compression of the molding material is then countered by two separate relative movements, namely the relative movement of the upper feeder part relative to the feeder element (the feeder element is inserted into the upper feeder element) and the relative movement of the tubular element. element relative to the adapter element (the tube-like element is pushed further into the adapter element until it bears against the travel limiters).
• the feeder element and the upper feeder part of a preferred feeder insert according to the invention together form a cavity for receiving liquid metal.
• a feeder insert which comprises or consists of:
• a two or more sectional feeder element having a first end for placement on a mold model and an opposite second end, the feeder element having a liquid metal passageway extending from the first to the second end and comprising or consisting of:
• the present invention also relates to a kit for producing a feeder element according to the invention, comprising a tube-like element and an adapter element. With regard to the configuration of the tubular element and the associated adapter element, the above applies accordingly.
• the invention also relates to a kit for producing a feeder insert according to the invention, comprising a tube-like element and an adapter element for producing a feeder element according to the invention and - an upper feeder part.
• the present invention also relates to a method for arranging a feeder insert in a casting mold, comprising the following steps:
• the upper feeder part and the feeder element are preferably chosen so that when placing the upper feeder part on the feeder element, a feeder insert is formed, wherein the feeder element and the upper feeder part are slidable into each other, wherein the upper feeder part and the Feeder element are moved into each other (optionally after separation or deformation of holding elements).
• the molding machine comprises a pattern plate (that is, a molding machine model, usually consisting of a flat plate with cast-in or mechanically-fastened models) and the feeder element is inserted into the molding machine so that it can with its first end is in direct contact with the model plate (the model surface).
• a pattern plate that is, a molding machine model, usually consisting of a flat plate with cast-in or mechanically-fastened models
• FIG. 1 A perspective view of a typical vehicle.
• FIG. 1 A perspective view of a typical vehicle.
• FIG. 1 A perspective view of a typical vehicle.
• FIG. 1 A perspective view of a typical vehicle.
• FIG. 1 longitudinal section through a feeder insert according to the invention with a feeder element in an arrangement in which the tubular element is not inserted maximally far into the adapter element and the feeder insert is fixed by means of a centering mandrel on a mold model.
• FIG. 2 longitudinal section through the feeder insert according to the invention and the
• Feeder element of FIG. 1 in an arrangement in which the tubular ele- ment is inserted maximally far into the adapter element and the
• Feeder insert is attached by means of a centering mandrel on a mold model.
• Fig. 3 shows a longitudinal section through the feeder insert according to the invention and the feeder element of Fig. 1 in a compressed arrangement, as it exists after compacting.
• FIG. 4 top view of the feeder element of the feeder insert according to FIG. 1.
• FIG. 5 enlarged view of a longitudinal section of the feeder element according to FIG. 4.
• a feeder insert 8 according to the invention is shown in a possible starting arrangement (before the filling of molding material and before the compression process).
• the feeder insert 8 according to the invention comprises a feeder element 10 and an upper feeder part 18, which are essentially rotationally symmetrical.
• the axis of rotation extending in the longitudinal direction of the feeder insert 8 is indicated in FIG. 1 by a dashed line 48.
• the feeder element 10 comprises an adapter element 24 into which a tube-like element 22 is inserted in such a way that it is frictionally connected to the adapter element 24, but is displaceable therein using a certain amount of force.
• the feeder element 10 may consist of more than two components.
• the feeder element comprises a first end 14 and a second end 16, the first end 14 being formed by the tubular element 22 and the second end 16 being formed by the adapter element 24.
• the tubular member includes an edge region opposite the first end 14 of the feeder element.
• the adapter element 24 includes Wegbeskyr 26.
• the tubular element 22 is not inserted maximally far into the adapter element 24.
• the tubular element 22 may be inserted as far as possible into the adapter element 24, so that it rests against the Wegbeskyrn 26 with its the first end 14 opposite edge region and is prevented from further insertion (see Fig. 2).
• the feeder element 10 With the first end 14 of the tubular element 22, the feeder element 10 is placed on a mold model 12.
• the feeder element 10 forms between its first end 14 (formed by the tubular element 22) and a second end 16 (formed by the adapter element) a passage 20 for liquid metal.
• the tubular element 22 has a maximum wall thickness of 1, 5 mm and consists of metallic, ceramic or plastic materials and composite materials based on metal, ceramic and / or plastics.
• the tubular member 22 is made of iron, an iron alloy such as steel, aluminum, an aluminum alloy, a brass alloy, or ceramics.
• the adapter element 24 has a wall which is larger in sections or everywhere than the thickness of the tubular element at the first end 14 of the feeder element 10 and, like the upper feeder section 18, consists of an exothermic or insulating molding compound.
• Wegbebankr 26 are integrated, which are designed in the form of ribs (see Figures 4, 5).
• the Wegbeskyr consist of the same exothermic or insulating molding compound as the Adapterelelment 24 and do not form a separate component. They serve to limit the insertion path of the tubular element 22.
• the outer wall of the adapter element 24 has a conically widening section 62, which merges into a section 42 with a constant diameter. At least one holding projection 34 is provided at this section 42.
• the inner wall of the adapter element 24 also consists of a flared portion and a constant diameter portion.
• the upper feeder part 18 is placed with its lower edge 38 on holding projections 34 of the adapter element 24 and fixed by means of the centering mandrel 36.
• the upper feeder part 18 is made quite thick-walled in relation to the tubular element 22 and to the adapter element 24.
• the outer wall of the upper riser 18 has a first relatively sharply flared portion 56 before the outer wall merges into a less extensive flared conical section 58.
• the upper feeder part 18 tapers conically upwards.
• the inner wall of the upper feeder part 18 forms a portion 40, which initially parallel to the outer wall 42 of the adapter element 24 and then merges into a conically upwardly tapering wall portion 50, along which the tip of a centering mandrel during positioning of Feeder insert 8 can be performed.
• the conical wall section 50 finally opens into a centering bore 52 located in the axis of rotation 48 of the feeder insert 8 for receiving the tip of the centering mandrel 36.
• the upper riser 18 and the adapter 24 form a cavity of interconnected part cavities 30 and 44 for receiving liquid material.
• the tubular element 22 of the feeder insert 8 according to the invention is inserted maximally far into the adapter element 24.
• the illustration includes two cutting planes through the adapter element 24: on the left side of the axis of rotation 48 in FIG. 2, the cutting plane is selected such that the travel limiter 26 is not cut (section A), on the right side of the rotation axis 48 in FIG the cutting plane passes through the Wegbeskyr 26 (section B, to select the cutting planes see also Fig. 4).
• FIG. 3 the feeder insert 8 (according to Figures 1 and 2) is shown in a compressed arrangement.
• the connecting surfaces between the holding projections 34 and the adapter element 24 are each quite small, so that the holding projections 34 can be separated from the adapter element 24 with little effort.
• the upper feeder part 18 Due to the force resulting from the compression, the upper feeder part 18 is displaced in the direction of the mold model 12. In this case, the force need only be sufficiently large to hold the retaining projections 34 from the adapter element 24 to separate.
• the displacement path of the upper feeder part 18 in the direction of the mold model 12 is predetermined and limited by the degree of compression molding.
• the tip of the centering mandrel 36 as shown in FIG. 3 breaks through the between the upper end of the center hole 52 and a wall section 54 located in a Wandungsab gleich.
• This wall portion is dimensioned so that the displacement between the upper feeder part 18 and the adapter element 24 is not hindered.
• the lower edge 36 of the upper feeder part 18 acts as a stamp surface on the material to be compacted between the lower edge 36 and the mold model 12 during the compression process.
• FIG. 4 is a plan view of the feeder element 10.
• four path limiters 26 are provided, distributed uniformly over the circumference of the adapter element 24, which are an integral part of the adapter elements.
• the tubular element 22 is located at a maximum insertion in sections of its circumference.
• the Wegbebankr 26 are disposed within the adapter member 24 that the outer surface 46th of the first end 14 opposite edge region of the tubular member 22 is freely present in sections of the circumference.
• the path limiter (s) 26 may be arranged in the adapter element 24 in such a way that the outer surface 46 of the edge region of the tubular element 22 opposite the first end 14 is freely present with its entire circumference. From Fig. 4, the sectional planes A and B can be seen, which are used in Figures 2 and 5.
• FIG. 5 shows an enlarged longitudinal section through the feeder element 10, consisting of the adapter part 24 and the tubular element 22.
• the illustration includes two cutting planes through the adapter element 24: on the left in FIG. 5, the axis of rotation 48, the cutting plane is selected that the Wegbeskyr 26 is not cut (section A), on the right side of the axis of rotation 48 in FIG. 5, the cutting plane through the Wegbeskyr 26 (section B, to select the cutting planes see also Fig. 4). It can again be seen that the outer surface 46 of the edge region 46 of the tubular element 22 opposite the first end 14 is free in sections of the circumference.
• the cavity 44 of the adapter member 24 includes the free portions of the outer surface 46 of the first end 14 opposite edge region of the tubular member 22 at maximum insertion, so that liquid metal during the casting process with the outer surface 46 of the tube-like element 22 contact and contact there can remain. After solidification of the metal is achieved so that the feeder insert 8 breaks off during cleaning in the immediate vicinity of the casting and not in the upper region of the outer surface 46 of the tubular member 22.
• the tube-like element 22 can already be completely inserted into the adapter element 24 prior to compaction (compare FIG. 2).
• the compression forces which act on the feeder insert 8 during the compression process, are absorbed only by the relative movement between the upper feeder part 18 and the adapter element 24.
• a slot of at least 4 mm is ensured, see. Fig. 1.
• the compression forces occurring during the compression of the molding material are counteracted by two separate relative movements: first, by the relative movement between the upper feeder part 18 relative to the adapter element 24 and, secondly, by the relative movement between the adapter element 24 and the tubular element 22.
• FIGS. 1-3 also schematically illustrate a method according to the invention for arranging a feeder insert according to the invention in a casting mold.
• a tube-like element 22 which is inserted into an adapter element 24, placed together with this on a centering mandrel 36 which is mounted on a mold model 12.
• the tubular element 22 is thereby brought into direct contact with the mold model 12 with a first end 14.
• the tubular member is only partially, i. not maximally inserted far into the adapter element 24.
• the tubular element 22 can be inserted maximally far into the adapter element 24, cf. Fig. 2.
• an upper feeder part is placed on the adapter element 24 so that it is supported by this.
• holding projections 34 are provided, for example.
• the feeder insert 8 is enveloped with molding sand 32 or another molding material (cladding indicated only in the lower region).
• the tube-like element 22 is inserted maximally far into the adapter element 24, so that it rests against travel limiters 26 and can no longer be pushed into the adapter element 24. Whether the tubular element 22 partially or maximally in the adapter element 24 before the Compression process is inserted depends on the particular application.
• the arrangement according to FIG. 3 results.
• the holding projections 34 are broken off by the adapter element 24, the upper feeder part 18 is pushed telescopically a distance onto the adapter element 24.
• the displacement path of the upper feeder part 18 on the adapter element 24 is predetermined by the degree of molding material compaction.
• the tube-like element 22 as shown in Fig. 1
• the spring mandrel 36 breaks through the upper wall 54 of the upper riser 18;
• the depth of the centering bore 52 is chosen so that the displacement between the upper feeder part and the adapter element 24 is not hindered.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)
• Vending Machines For Individual Products (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Push-Button Switches (AREA)
• Continuous Casting (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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• 2006
  • 2006-11-24 DE DE102006055988A patent/DE102006055988A1/de not_active Withdrawn
• 2007
  • 2007-11-21 JP JP2009537626A patent/JP2010510071A/ja not_active Withdrawn
  • 2007-11-21 CN CN2007800436269A patent/CN101563177B/zh not_active Expired - Fee Related
  • 2007-11-21 CA CA002670437A patent/CA2670437A1/fr not_active Abandoned
  • 2007-11-21 WO PCT/EP2007/062620 patent/WO2008062007A1/fr not_active Ceased
  • 2007-11-21 AU AU2007324542A patent/AU2007324542B2/en not_active Ceased
  • 2007-11-21 US US12/516,119 patent/US20090301684A1/en not_active Abandoned
  • 2007-11-21 EA EA200970507A patent/EA014660B1/ru not_active IP Right Cessation
  • 2007-11-21 DE DE502007006521T patent/DE502007006521D1/de active Active
  • 2007-11-21 ES ES07847249T patent/ES2358456T3/es active Active
  • 2007-11-21 BR BRPI0717660-0A2A patent/BRPI0717660A2/pt not_active IP Right Cessation
  • 2007-11-21 AT AT07847249T patent/ATE498464T1/de active
  • 2007-11-21 PL PL07847249T patent/PL2097193T3/pl unknown
  • 2007-11-21 EP EP07847249A patent/EP2097193B1/fr active Active
  • 2007-11-21 KR KR1020097010524A patent/KR20090088885A/ko not_active Withdrawn
• 2009
  • 2009-05-19 ZA ZA200903456A patent/ZA200903456B/xx unknown

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