EP3727723A1 - Procédé de production d'une partie de moule ainsi qu'insert d'alimentation destiné à être utilisé dans un tel procédé - Google Patents

Procédé de production d'une partie de moule ainsi qu'insert d'alimentation destiné à être utilisé dans un tel procédé

Info

Publication number
EP3727723A1
EP3727723A1 EP18807265.6A EP18807265A EP3727723A1 EP 3727723 A1 EP3727723 A1 EP 3727723A1 EP 18807265 A EP18807265 A EP 18807265A EP 3727723 A1 EP3727723 A1 EP 3727723A1
Authority
EP
European Patent Office
Prior art keywords
feeder
insert
feeder insert
mold
closed
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
EP18807265.6A
Other languages
German (de)
English (en)
Inventor
Michael BIEMEL
Heiko Schirmer
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.)
Chemex Foundry Solutions GmbH
Original Assignee
Chemex Foundry Solutions GmbH
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 Chemex Foundry Solutions GmbH filed Critical Chemex Foundry Solutions GmbH
Publication of EP3727723A1 publication Critical patent/EP3727723A1/fr
Pending legal-status Critical Current

Links

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
    • B22C9/088—Feeder heads
    • 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
    • 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
    • B22C9/082—Sprues, pouring cups
    • 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
    • B22C9/086—Filters

Definitions

  • the present invention relates to a method for producing a molded article with a feeder insert arranged thereon with a sprue for liquid metal, for a divisible casting mold for metal casting. Furthermore, the invention also relates to a molding for a divisible mold and a mold of at least two moldings. Furthermore, the invention also relates to a feeder insert for use in a method for producing a molded part and the use of a closed feeder insert.
  • the invention is defined by the claims and disclosed in detail in the following description.
  • Feeder inserts are used in large numbers and variety in the casting of metals in molds.
  • the feeder inserts also referred to as feeder systems, are surrounded at least in regions by a molding material used to produce the casting mold, for example a molding sand.
  • a molding material used to produce the casting mold
  • the feeder insert is held within the mold in a predetermined position.
  • Known feeder inserts have a feeder cavity with a passage for the liquid metal. Through the passage opening, hereinafter also referred to as feeder opening, a connection with areas of the mold cavity to be formed of the molded part is produced. A portion of the metal filled into the mold cavity during the casting process enters through the feeder opening the feeder insert and thus in the feeder cavity.
  • the liquid metal which has entered the feeder insert is intended to be able to flow back into the casting mold during the process of solidifying the metal in the casting mold, which is associated with a contraction of the casting metal. This compensates or compensates for the shrinkage of the casting up to the solidus temperature.
  • the metal in the feeder sleeve is kept in the liquid state for a while until the metal present in the interior of the casting mold has already solidified or already partially solidifies into the casting.
  • At least part of the feeder insert usually consists of an insulating and / or exothermic material.
  • a gate system is used which is to be produced during the production of the molded part.
  • a disadvantage that arises when using a gating system is the increased amount of liquid material to be used to make a casting, which may account for up to about 50% of the material for the casting.
  • the mold has a mold cavity and a gate connecting the mold cavity to the outside of the mold having a pouring throat and a feeder sleeve disposed in a portion of the runner.
  • the feeder sleeve is open to the one in the direction of the Eingusstrichters and also has a Suiterö Stamm in the direction of a mold cavity, which is formed by portions of a mold half or a molded part.
  • Such an open feeder insert is used for manufacturing reasons only after the manufacture or molding of the molded part in a formed on the molding recess, which is intended to receive the feeder insert and dimensioned accordingly.
  • This recess for the feeder insert, in which the feeder insert, after the molded part has been produced, is used on the finished molded part, is taken into account in the manufacture of the molded part.
  • inserting the feeder insert into the recess which can be done, for example, by hand or with an insertion device, however, due to inaccuracies, it may happen that the feeder insert is not positioned exactly in the recess. That can in particular lead to irregularities in a manufactured casting and a costly rework. In particular, an inaccurate insertion of the feeder insert into the recess can result in that the produced casting can not be used.
  • the feeder insert has a body that provides a cavity for receiving molten metal.
  • the body has an upper part and a lower part connected to the upper part.
  • the lower part defines a feed opening of the sprue feeder.
  • the lid of the upper part has an opening opposite the feeder opening.
  • the cavity in the body receives a loose refractory filter which is larger than the feeder opening.
  • DE 10 2005 019 385 A1 shows a feeder for insertion into a casting mold having a casting cavity with a feeder cavity opened on opposite sides of the feeder.
  • a first opening connects the feeder cavity to the casting cavity.
  • a second opening is arranged opposite the first opening, wherein a filter element is arranged in the half of the feeder cavity facing the second opening.
  • JP 2001 079646 A discloses a method for producing a casting mold with a pouring opening, in which a mold model and a sprue bush are inserted into a molding box and the molding box is filled with molding sand.
  • the sprue bushing is shorter than the molding box and will not be damaged during pressing of the molding sand. After pressing, the area above the sprue bush is exposed using a cutting tool.
  • the invention has for its object to provide a method for producing a molded part with a feeder insert arranged thereon with a sprue for liquid metal or a feeder sleeve for use in a method for producing a molded part, with which the production of a molded part or a thereof mold to be formed while avoiding the disadvantages described above is possible.
  • the invention solves the problem on which it is based by a method for producing a molded part with a feeder insert arranged therein
  • the method achieves the object with the following steps: producing or providing a molded part made of a compacted molding material equipped with a closed feeder insert, the closed feeder element being Set is fixed in the compacted molding material of the molding and having a connected to areas of a mold cavity to be formed or a partially formed mold opening, and opening the closed feeder insert, so that a gate for liquid metal is formed.
  • the invention is based in particular on the finding that a molding with a feeder insert arranged therein or there is provided or can be produced by means of the inventive method steps, in which the pouring of the liquid metal over the feeder insert is possible, in contrast to the prior art Technique for the production of the molded part with sprue feeder arranged therein a (initially) closed feeder insert is used.
  • a closed feeder insert By using a closed feeder insert, it is achieved that during the production of the molded part from a molded material to be compacted, the likelihood that the molded material enters the feeder cavity of the feeder insert is minimized.
  • the opening of the closed feeder insert takes place only after completion of the molding and thus only after the molding material used to produce the molding has been compressed.
  • first closed feeder insert With the opening of the closed feeder insert then the sprue for the liquid metal is formed.
  • a correspondingly arranged in or on the molded part, first closed feeder insert is converted into an open feeder insert and thus to a sprue feeder only after the production of the molding itself.
  • Moldings which can be produced according to the invention can be produced in a simplified manner, in particular by means of so-called modern green sand molding systems (for example DISAMATIC molding machines from DISA Industries A / S).
  • the steps of producing the molded part with the closed feeder insert arranged thereon and the opening of the closed feeder insert take place in immediately successive steps.
  • the production of the molded part with the feeder insert arranged thereon is interrupted in time to the step and / or locally spaced from the position, when the opening of the closed feeder insert and the formation of the sprue on Feeding insert for the liquid material is made.
  • the production of the molded part equipped with the closed feeder insert comprises the steps of: arranging the closed feeder insert in a molding chamber or a molding box; Filling of molding material in the molding chamber or the molding box, wherein the closed food rrus is at least partially surrounded by the molding material; and compacting the filled molding material so that the molded part is produced and the closed feeder insert is received in a fixed manner in the compacted molding material of the molded article.
  • the arrangement of the closed feeder insert is preferably carried out using auxiliary means, on which the feeder insert is received and / or with which the feeder insert is arranged together relative to a forming chamber or a molding box.
  • auxiliary means on which the feeder insert is received and / or with which the feeder insert is arranged together relative to a forming chamber or a molding box.
  • the filling of molding material in the mold chamber of the closed feeder insert is at least partially surrounded by molding material.
  • the region or in particular the regions in which the sprue for the liquid metal is to be produced is not covered by molding material.
  • the closed feeder insert is completely surrounded by molding material at least over a section in the direction of its longitudinal axis.
  • the molding After filling of the molding material of the molding material is then compressed, with the compaction of the molding material, the molding receives its final shape and the feeder sleeve is received and arranged in the molded compact of molded material stationary.
  • the term fixed mounting is to be understood as meaning that the still closed feeder insert can no longer be moved relative to the compacted molded part.
  • a defined amount of molding material is introduced into the molding chamber, so that after the molding material has been compacted, the feeder insert is enclosed over its entire height by molding material of the molding.
  • the upper end of the feeder insert is preferably not covered by molding material, so that the sprue is formed from a sprue at the feeder insert.
  • it is also intended to cover the upper end of the feeder insert by compressed molding material of the molded part, so that the gate for the liquid metal by removing material of the compacted molding material and opening the (initially closed) feeder sleeve.
  • the production of the molded part equipped with the closed feeder insert preferably has the step of compacting in contact with the closed mold Feeler used molding material, so that the closed feeder insert is embedded in the molded part produced form-fitting.
  • the closed feeder insert is therefore preferably dimensioned or tuned in its shape and further preferably a defined amount of molding material in the mold chamber or in the mold box filled so that after compacting the molding material wall portions of the closed feeder insert, based on the pouring of liquid metal, preferably in the radial direction are overlapped, so that the feeder insert is firmly embedded in the compacted molding material of the molding. This ensures that the closed feeder insert is arranged immovably within the molded part produced. This further improves the reliability in the production of the molded part.
  • the closed feeder insert is completely covered by the molding material forming the molded part at the end facing the end with the feeder opening and thus completely accommodated in the molded part.
  • the closed feeder insert is thus initially (before opening) not visible from the outside of the molded part.
  • producing the molded article equipped with the closed feeder insert comprises the steps of positioning the closed feeder insert on a mold plate and / or a mold model or spaced from a mold plate and / or a mold model, wherein the closed feeder insert is preferably automated by hand or by means of a positioning device is formed, and forming one or the molding chamber or a molding box or for the molded material to be compressed, preferably at least partially from the mold plate and / or the mold model and at least one relative to the mold plate and / or the mold model movable press plate.
  • a mold plate also referred to as a model plate and / or a mold model
  • the closed feeder insert is in particular fixedly positioned on the mold plate and / or the mold model, wherein in one embodiment on the mold plate or the mold model, a centering mandrel or a correspondingly suitable positioning means for the closed feeder insert is provided.
  • the closed feeder insert is pushed with its feeder opening on the centering pin or the positioning means.
  • the centering pin or the positioning means is adapted in its dimensions to the dimension of the feeder opening. The positioning is done either by hand or by means of a closed feeder insert receiving positioning.
  • the mold plate or the mold model After the closed feeder insert on the mold plate and / or the mold model, which may be arranged even on a mold plate or a model plate, positioned has been, the mold plate or the mold model is moved with the closed feeder insert positioned thereon in a position and / or brought into alignment with a press plate and the mold chamber or the mold box bounding side walls.
  • the mold plate and / or the mold model define at least one region of the mold chamber or of the mold box into which the molding material can be filled or, in particular, injected.
  • a defined amount or a presettable amount or mass of molding material is filled into the molding chamber or the molding box, in particular injected.
  • the molding material is preferably injected under high pressure into the molding chamber.
  • the molding chamber or the molding box is preferably completely filled by the molding material used to form the molding.
  • the steps of providing the molded part equipped with the closed feeder insert are further provided: providing a closed feeder insert substantially compressible along its longitudinal axis and compressing the closed feeder insert in the direction of its longitudinal axis during compacting of the molding material.
  • a compressible feeder insert is understood to be a feeder insert which can reduce its dimension in the direction of the longitudinal axis during or during the compression of the molding material due to compression forces acting in the longitudinal direction.
  • the distance between the end of the feeder insert having the feeder opening and the opposite end of the feeder insert, in which preferably the sprue in the form of a pouring opening for the liquid metal by the opening of the closed feeder insert to be generated is described, for example, in the claims of DE 100 39 519 A1, DE 100 59 481 A1, DE 10 2015 101 913 B3, DE 20 2004 009 367 U1, DE 20 2013 001 933 U1, EP 1 567 294 B3, EP 1 879 710 B1 and WO 2005/095020 A2.
  • a preferred method according to the invention is characterized during the manufacture of the molded part by the step: providing a closed one-piece or a closed multipart, preferably compressible feeder insert, wherein in the one-piece or multi-part feeder insert after or before opening the feeder insert a filter element is introduced , wherein preferably the filter element is held in position after its introduction by means of at least one securing element.
  • the filter element is introduced into the feeder cavity after opening the feeder insert.
  • the filter element is preferably introduced into the feeder cavity before opening the feeder insert.
  • the filter element is preferably used during the manufacture of the feeder insert, in particular before the joining of the several individual parts to the closed multi-part feeder insert in the feeder cavity.
  • the filter element inserted into the feeder cavity of the feeder sleeve is preferably held in position after insertion by means of at least one securing element.
  • the correspondingly locked filter element is prevented from moving within the feeder insert. This counteracts in particular a tilting of the filter element, so that it can always safely fulfill its original function, namely the filtering of the melt during filling.
  • a securing element or a plurality of securing elements is used for holding the filter element in position within the feeder cavity.
  • the securing element or elements are preferably formed completely or partially from a thermally destructible material, for example a material made of plastic, cardboard, Paper or a combination thereof.
  • the filter element With the filling of liquid metal in the feeder insert, the filter element is released, so that it receives a limited movement space within the feeder insert.
  • the securing element can be destroyed and the filter element in the feeder element can float on the liquid metal rising in the feeder element. With the floating of the filter element in the feeder cavity of the feeder insert, the effective feed volume is increased and thus improves its feeding effect.
  • the filter element by means of a ring, for. B. of foam, or locked by means of several distributed over the circumference of the filter element arranged securing wedges.
  • a closed multi-part feeder insert is provided with a filter element already arranged therein and in particular held by at least one securing element filter element which is positioned on a mold plate or a mold model and then preferably together with the mold plate and / or the mold model in a mold chamber or a molding box is arranged.
  • the filter element is fixed or movably received in a receiving area in the feeder cavity of the closed feeder insert.
  • a filter element already arranged therein can be moved to the side in a multi-part feeder element when pushing the feeder insert on, for example, a centering mandrel.
  • the movable receiving the filter element in the feeder insert also has the advantage that when ascending the liquid metal into the sprue feeder, the filter element can float, whereby the feeder cavity of the now open according to the invention feeder insert is enlarged, which the desserts of the mold cavity during the solidification of the casting simplified.
  • the opening of the closed feeder insert has one, several or all of the following steps: changing the position, preferably turning the prepared molded part together with the stationary arranged fixed feeder insert before opening the feeder insert, so that the later having the sprue part of Feeder insert, based on a horizontal plane, below which is arranged connected to areas of the mold cavity to be formed feed opening; Opening the feeder insert at a position spaced from the feeder opening, in particular an end section of the feeder insert opposite the feeder opening; and machining the closed feeder insert or machining the closed feeder insert and areas of the compressive molding material surrounding the feeder insert for opening the feeder insert in one or the changed position of the molded part produced together with the stationary recorded feeder insert.
  • the molded part, together with the closed feeder insert received therein or therein is rotated before opening so that the feeder insert is turned upside down in its usual orientation during use.
  • the feeder opening is preferably arranged (in the aforesaid or another way) above the area of the feeder insert which is to be opened and in which the sprue for filling the liquid metal is to be formed.
  • the sprue which is formed at least as a sprue opening in the feeder insert, is produced at the end or end section of the feeder insert opposite the feed opening (uppermost in the insert).
  • the feeder insert in particular the end portion of the closed feeder insert opposite the feeder opening, is processed, in particular after the produced molded part has been turned over and the region to be opened thus lies below the feeder opening.
  • This avoids that molding material penetrates when opening the closed feeder insert into the feeder cavity. Instead, due to the force acting in the opposite direction gravity, dissolving material of the feeder insert or dissolving molding material of the molded part is automatically discharged down.
  • appropriate tools are preferably used, such as drills or cutters with which at least the sprue opening in the feeder insert is drilled or milled.
  • a preferred method according to the invention provides the step of opening the closed feeder insert and forming the sprue on the feeder insert and the molded part by mechanical working, leaving after the formation of the sprue areas of the molded part, which with respect to the pouring direction for the liquid Metal overlap wall portions of the feeder insert, preferably substantially radially overlap, so that a feeder insert formed edging undercut and / or removal of the feeder insert is prevented from the molded part produced.
  • the intended for opening, upper end of the feeder insert which is preferably completely covered by the compacted molding material for the molded part, only partially exposed.
  • the compacted and solid molding material of the molded part overlaps edge regions of the feeder insert at the upper end or protrudes inward in the radial direction via these edge regions. This ensures that in particular closed feeder inserts can be used, which undergo no or no mechanically significant positive locking during compression of the molding material with the molding due to their shape along their outside. So even with such feeder inserts a secure hold in the molded part is effected.
  • An example in its longitudinal direction a conical outer contour exhibiting feeder insert can be received stationary within the molding.
  • Another aspect of the present invention relates to a molded part for a divisible casting mold, in particular for metal casting, comprising at least one fixed in the compressed molding material of the molded part feeder insert.
  • the invention also solves the problem underlying the method according to the invention in that the feeder insert has a sprue for liquid metal and a feed opening connecting the feeder insert with parts of the mold cavity, wherein the molded part can be produced by a method according to one of the above-described preferred embodiments of the invention is and / or wherein the molded part has areas that overlap with respect to the pouring direction for the liquid metal wall portions of the feeder insert, preferably substantially radially overlap, so formed a the feeder insert enclosing undercut and / or removal of the feeder insert is prevented from the molding.
  • the invention is based, in particular, on the finding that mold parts for a divisible mold can thus also be produced in a simple manner using a closed feeder insert.
  • the now open feeder insert can not be easily removed from the molded part due to its stationary reception within the molded part.
  • the subsequently opened sprue feeder is received positively within a recess in the compacted molded part.
  • a filter element of porous material is arranged inside the feeder insert, in particular in the feeder cavity. By means of the filter element, the liquid metal filled via the sprue of the feeder insert is cleaned, so that no foreign bodies or undesirable components are introduced into the casting to be produced.
  • the molding preferably forms a partial region of a casting mold, surface regions of the molded part defining the outside of the casting mold and at least one surface forming a dividing surface on the molded part with which a dividing surface of at least one further molded article can be brought into abutment to form the casting mold.
  • the feeder insert preferably after the production of the molding
  • the feeder insert is subsequently opened and is covered on its upper side by material portions of the molding forming compacted molding material, a sprue with a sprue on the feeder insert, one with the Inlet opening corresponding to the sprue and at the top of the molding a Eingusstümpel in the compressed molding material.
  • a sprue corresponding to the sprue, and optionally a sprue are formed by means of the compacted molding material of the molding and are preferably formed together with the sprue at the feeder insert by a machining tool.
  • the invention relates to a casting mold comprising at least two molded parts, with a first molded part and a second molded part, which have partition surfaces which can be brought into abutment with one another and are arranged to be joined together to form at least part of the mold cavity.
  • at least one of the molded parts is a molded part according to the invention, preferably one according to one of the preferred embodiments described above.
  • the casting mold according to the invention thus has at least one molded part according to the invention within which a (preferably originally closed) feeder insert is received in a fixed manner in the compacted molding material, the feeder insert having a sprue for liquid metal and a feeder opening connecting the feeder insert with parts of the mold cavity, and wherein according to a (first) embodiment of the casting mold according to the invention, the molding has regions which, based on the pouring direction for the liquid metal engage over wall portions of the feeder insert, preferably substantially radially overlap, so formed an undercut enclosing the feeder insert and / or a removal of the feeder insert is prevented from the molding, and / or according to a further (second) embodiment of the mold according to the invention, the molding, as described above according to the preferred embodiments, in particular e provided or prepared according to the invention and opened to form a gate for liquid metal.
  • a cast piece can be placed on a secure and be made efficiently without the risk that undesirable components of the molding material forming the molding enter the mold cavity during manufacture of the molding and thus before casting.
  • the casting mold is produced with the mold cavity for the casting to be produced by at least the joining together of the contacting surfaces of at least a first molded part and a second molded part.
  • the molded part is arranged with the sprue feeder, also referred to as a sprue feeder insert, which is stationarily held therein, so that the sprue opening on the feeder insert is arranged above the feeder opening of the feeder sleeve during use of the casting mold.
  • the invention in another aspect relates to a feeder sleeve for use in a method according to the invention, preferably one of the preferred embodiments described above, comprising at least one feeder body forming at least a portion of a feeder cavity for receiving liquid metal.
  • the feeder insert according to the invention solves the problem described above in that the feeder insert has a feeder opening for the passage of liquid metal at a first end in the feeder body is formed closed at a first opposite second end and extending between the first and second end side walls wherein the feeder insert is a multi-part feeder insert and within the feeder cavity, a filter element is arranged or a one-piece or multi-part (preferably one-piece) feeder insert and has a receiving area for a insertable into the feeder cavity filter element in the feeder cavity.
  • a feeder insert constructed in accordance with the invention is adapted or prepared to be used as a sprue feeder insert, in particular after the feeder insert has been opened at the second, closed end and a sprue in the form of a molten metal sprue has been formed.
  • a closed feeder insert designed in accordance with the invention can be accommodated relatively easily within a molded part to be produced. During the production of the molded part, in particular during the compression of the molding material used for the production of the molded part, its closed configuration, the entry of parts of the molding material in the interior of the feeder insert, in particular its feeder cavity, prevented.
  • the filter element is preferably arranged fixedly inside the feeder cavity.
  • a filter element is preferably subsequently introduced or inserted into the feeder cavity, in particular after opening the closed feeder insert.
  • the subsequently introduced filter element is in particular movable within the feeder element according to the invention and can preferably float within the feeder cavity within the sprue feeder insert.
  • at least one securing element is held in position in the feeder cavity and / or a contact area for at least one securing element is provided in the feeder cavity, which is adapted to insert the filter element insertable into the receiving area of the feeder cavity Hold position.
  • the filter element is held in position, in particular in the case of a correspondingly prefabricated feeder insert, for example during transport or during movement of the feeder insert during production of the molded part according to the invention.
  • the securing element hinders a relative movement between the filter element and feeder insert.
  • the securing element is a tilting o- setting up of the filter element within the feeder cavity counteracted.
  • the filter element has an outer diameter which is about 0.2 to 1, 5 cm smaller than an inner diameter of the receiving element receiving the filter element in the feeder cavity.
  • the filter element and also the filter element receiving, corresponding receiving area may have any shape, wherein the filter element has smaller dimensions than the receiving area on the feeder insert.
  • the one or more securing elements comprise a thermally destructible material or the securing element or elements are formed therefrom; for suitable materials, reference should be made to the above statements.
  • the fuse element has the property to be destroyed during the filling of the liquid metal in the feeder insert, preferably to burn. This gives or give the securing elements the filter element within the feeder insert free, so that the filter element can float if necessary within the feeder insert.
  • a plastic material preferably a foam, is used as the material for forming the securing element.
  • one or more adhesive dots of preferably a hot melt adhesive are used, which dissolve upon contact with the liquid metal.
  • the feeder body has a feeder element and a further feeder part, which partially delimit the feeder cavity for receiving liquid metal.
  • the feeder body is designed in several parts, wherein the feeder element and the feeder part are fixedly or detachably connected to each other.
  • an opening region is preferably present, through which, for example, the filter element can be inserted into the jointly formed feeder cavity.
  • the feeder element and the further feeder part are firmly connected to each other.
  • the feeder element can be materially connected to the feeder part in one embodiment of the invention.
  • the feeder element is the component which is in direct contact with a mold plate or with a mold model or is positioned at a short distance from the mold plate and / or the mold model.
  • the feeder element is preferably compressible, particularly preferably irreversibly compressible, and may preferably be formed as a metallic sleeve having a wall with a substantially uniform cylindrical diameter or a stepped wall. See again the disclosure of the above patent documents.
  • the feeder portion forms the closed end of the feeder sleeve and at least portions of the sidewalls of the feeder body extending between the first and second ends.
  • the feeder body is closed at its second end by means of a lid.
  • a filter element is preferably introduced before the opening of the feeder insert in the feeder cavity by the feeder body has a removable lid. After the filter element has been inserted into the feeder cavity of the feeder insert, the cover is reconnected to the remaining feeder body, so that a one-piece structure of the feeder body results.
  • the term "one-piece" means that the feeder body can be formed from a plurality of individual parts, but which are not intended to be separated and reassembled as often as desired or are adapted to be moved relative to one another.
  • the feeder body is when it is composed of several individual parts, but the individual parts are intended to interact permanently with one another.
  • Such a one-piece feeder body is preferably not reversible disassembled into its individual parts, ie after dismantling not readily reassembled into a functional whole.
  • a multi-part feeder insert is a feeder insert composed of several individual parts having a feeder body whose individual parts preferably allow a relative movement of certain individual parts relative to one another during use of the feeder insert and / or whose individual parts can be reversibly separated from one another and joined together as often as desired
  • the cover which is part of the feeder body, is preferably connected at the second end of the feeder body to a feeder part of the feeder body, which in a corresponding embodiment forms a central part of the feeder insert.
  • feeder element and feeder part of the feeder body are made of different materials.
  • the feeder element and the further feeder part of the feeder body or the feeder element and the cover closing the feeder body at the second end are telescopically displaceable relative to one another and / or the feeder element or the further feeder part is compressible, in particular irreversibly compressible educated.
  • the feeder body is designed to be compressible along its longitudinal axis, so that the distance between the opposite ends of the feeder insert is variable.
  • a closed feeder insert designed as a telescopic feeder insert see DE 100 39 519 A1
  • the feeder element and the further feeder part are moved relative to one another.
  • the further feeder part on which the sprue for the liquid metal is formed, is pushed over the feeder element, in particular sections, during the compression of the molding material.
  • the feeder element and the further feeder part are not deformable in themselves.
  • the feeder element with the feeder opening formed thereon itself changes its position relative to the mold plate or the shape model is not. When compacting the telescopic feeder, the feeder part is thus primarily moved.
  • the telescoping of the multi-part feeder insert is effected between the feeder element and a lid closing the second end of the feeder body.
  • the cover preferably engages over the outer side or the outer circumference of the side wall of the feeder element of the feeder body with its or its sidewalls extending approximately parallel thereto.
  • only the lid is moved relative to the feeder element.
  • a movement stop is provided on the inside of the lid, which comes in contact with the second end of the feeder element during the molding of the molding sand during the manufacture of the molding in contact or conditioning.
  • the degree of telescoping of the feeder insert in this case limited by feeder element and lid to each other.
  • the feeder element is compressible (ie compressible), in particular irreversible (ie irreversible) compressible
  • the feeder element is compressed during compression of the molding material in such a way that in turn causes a relative movement between the feeder element and the further feeder part is. Rather, the feeder element deforms on its own, reducing the distance between the end of the feeder element seated on the mold plate or the mold model and the end of the feeder element in contact with the further feeder section during compacting of the molded article.
  • the feeder part can additionally (at least partially) be pushed over the deforming feeder element. It may also be provided to make a portion of the further feeder part compressible (i.e., compressible) longitudinally of the feeder sleeve.
  • the feed inserts which are designed to be compressible along the longitudinal axis
  • the pressure which is established in particular in the compression of the molding material in the molded part is compensated or compensated by the feeder inserts according to the invention. This avoids damage or even breakage of the feeder insert during production of a molded part according to one of the preferred embodiments described above.
  • a compressible, in particular irreversibly compressible feeder element of a thin-walled metallic material, such as steel, is formed.
  • the invention also relates to the use of a closed feeder insert, in particular a feeder insert according to the invention, preferably according to one of the preferred embodiments described above, in a method for producing an assembly of a molded part and a feeder insert according to the invention (preferably according to one of the above described preferred embodiments) or for producing a molded part according to the invention for a divisible mold according to the invention (preferably according to an embodiment above) or a mold according to the invention (preferably as described in more detail above).
  • the invention also relates, in a further aspect, to a method for producing a casting of a flowable material, in particular of metal, in a dividable casting mold, comprising the steps of: producing a casting mold according to the invention (preferably according to a preferred embodiment described above), preferably at least one of the mold parts of the casting mold is produced by a method according to the invention (preferably according to one of the preferred methods described above) and / or a molded part according to the invention according to a preferred embodiment given above) pouring flowable material through the sprue produced at the feeder insert into a mold Mold cavity in the mold, and solidification of the flowable material in the mold cavity.
  • a casting can be produced in an advantageously reliable manner, wherein at the same time a separate gating system can be dispensed with.
  • the use of a closed feeder sleeve according to the invention, which is subsequently opened to form a sprue on the feeder insert after the production of the molded part of the casting mold reduces the risk of parts of the molded material entering the mold cavity. This ensures permanently high process reliability during the production of the cast part.
  • FIG. 1 shows a view of a first embodiment of a closed, one-piece feeder insert according to the invention in section;
  • FIG. 2 is a view of a feeder insert according to the invention of FIG. 1 positioned on a mold plate or a mold model;
  • FIG. 3 shows a partial view of a molded part made of compacted molding material and the closed feeder insert according to the invention arranged therein after removal of the mold model;
  • FIG. 4 shows a partial view of the turned molding, which shows how the feeder insert according to the invention received therein is opened and a sprue is formed;
  • Fig. 5 is a view showing the pouring of liquid metal into the mold cavity of the produced mold over the formed gate of the feeder sleeve according to the invention
  • FIG. 6 shows a view of a second embodiment of a closed, compressible multi-part feeder insert according to the invention in section;
  • FIG. 7 is a view of a feeder insert according to the invention of FIG. 6 positioned on a mold plate or a mold model;
  • FIG. 8 shows a partial view of a molded part made of compressed molded material and the closed, compressed feeder insert according to the invention arranged therein after removal of the mold model;
  • Fig. 9 is a partial view of the turned molding showing how the feeder insert of the invention received thereon is opened and a sprue is formed;
  • Fig. 1 1 is a view of another embodiment of a closed, compressible multi-part feeder insert according to the invention in section;
  • FIG. 12 shows a partial view of a molded part made of compressed molded material and the closed, compressed feeder insert according to the invention arranged therein after removal of the molded model, and
  • Fig. 13 is a view showing the pouring of liquid metal into the mold cavity of the produced mold over the formed gate on the feeder insert according to the third embodiment.
  • FIG. 1 an inventive feeder insert 2 according to a first embodiment is shown in section.
  • the feeder sleeve 2 has a feeder body 4, which comprises a feeder cavity 6 for receiving liquid metal.
  • the feeder insert 2 has at a first end 8 on the feeder body 4 a feeder opening 10, by means of which a connection to a mold cavity 30 in a molded part 26 (FIG. 3) can be produced.
  • the feeder body 4 is formed closed at the opposite second end 12 and has between the first and the second end 8, 12 extending side walls 14.
  • a filter element 16 is arranged, is cleaned with the material flowing through the feeder insert 2 material.
  • the feeder body 4 is integrally formed in the present embodiment, even if the feeder body consists of several individual parts, such as a feeder element 18 and a lid 20. Unitary is to be understood in the present case that individual parts of the feeder body, such as the cover 20, are not intended to be separated from the feeder body 4. By “one-piece” is meant rather that the feeder body may indeed be composed of several individual parts, but the items are intended to work together permanently.
  • a one-piece feeder body is preferably non-reversibly separable into its individual parts, i. after disassembling not easily reassemblable.
  • FIG. 2 shows the feeder insert 2 according to the invention in a starting arrangement for producing a molded part according to the invention at a section of a mold model 22.
  • the feeder insert 2 is placed with its feeder element 18 at the first end 8 on the mold model 22 or positioned thereon.
  • the mold model 22 and arranged thereon feeder insert 2 is surrounded with a molding material, which is done in particular after arranging the feeder sleeve 2 in a mold chamber or a molding box, which is not shown in detail.
  • the molding material is compacted, so that a molded part 26 shown in FIG. 3 is made of compressed molded material 28.
  • the mold model 22 is removed after the production of the molded part 26, so that a mold cavity 30 is formed adjacent to the feeder element 20.
  • the mold cavity 30 shown in FIG. 3 defines at least regions of the casting to be produced.
  • the molded part 26 produced is changed in its position, namely turned.
  • the molding 26 is moved to a position in which the feeder sleeve 2 is "turned upside down" with the feeder opening 10 located above the second end 12 in which the sprue is to be created.
  • an opening of the closed feeder insert 2 at the second end 12 of the feeder body 4 whereby a sprue 32 is formed with at least one pouring opening 34 for the liquid metal.
  • the opening of the feeder insert 2 at the feeder opening 10 opposite end 20 of the feeder body 4 by means of machining using a corresponding tool 33.
  • the sprue 34 is introduced is Also, a sprue 35 and a Eingusstümpel 36 produced in the compacted molding material 28 of the molding 26.
  • the molded part is arranged such that no molding material is introduced into the feeder cavity 6 and into the feeder cavity 32 during the formation of the sprue 32 Contact with the filter element 16 arranged therein passes.
  • the former 26 is placed in a conventional orientation for use in which the feeder orifice 10 is positioned below the sprue 34, in the illustrated embodiment, the longitudinal axis 38 of the feeder sleeve 2 being vertically aligned.
  • the originally closed feeder insert 2 is now formed as a sprue feeder insert, so that via the sprue 32, as Fig. 5 illustrates, a liquid material 40, such as metal, is filled, which passes in the longitudinal direction of the feeder sleeve 2 through the feeder insert and in the Mold cavity 30 flows. As it flows through the feeder insert 2, the liquid material 40 is cleaned by means of the filter element 16 and the melt flow is calmed.
  • FIG. 6 shows a compressible feeder sleeve 2 'having a feeder body 4' having a feeder element 18 ', a feeder part 42' and a lid 20 '.
  • the lid 20 ' is fixedly connected to the feeder part 42' instead of the feeder element 18 'in the embodiment shown.
  • the cover 20 ' is a part belonging to the feeder part 42' and thus preferably an integral part of the feeder part 42 '.
  • the feeder part 42 ' is with the lid 20' together a one-piece component.
  • the feeder insert 2 ' is a multi-part feeder insert, wherein the feeder insert 2' is a closed feeder insert which can be compressed along its longitudinal axis.
  • the feeder element 18 ' likewise has a feeder opening 10' arranged at the first end 8 of the feeder insert 2 '.
  • a feeder cavity 6' is formed, within which a filter element 16 'is arranged or accommodated.
  • the side walls 14 'of the feeder sleeve are essentially formed by the feeder part 42' in the present embodiment.
  • the feeder insert 2 ' accordinging to the invention is placed on a mold model 22.
  • the positioning of the feeder insert 2 'on the mold model 22 takes place by means of a centering mandrel 24'. Areas or sections of the feeder element 18 'and the feeder part 42' are pushed over the centering mandrel 24 'and are in direct contact with it.
  • the centering mandrel 24 ' takes place a local orientation of the feeder insert 2' relative to the mold model 22 as well as an angular orientation of the feeder insert 2 'to the mold model 22, wherein the feeder insert 2' is aligned with its longitudinal axis 38 'in particular perpendicular to the surface of the mold model 22.
  • the mold model 22 and the feeder insert 2 'arranged thereon are arranged, for example, in a molding chamber or a molding box, not shown in detail, which delimit at least regions of the molded part to be produced.
  • the mold model 22 and the feeder insert 2 'arranged thereon are at least partially surrounded by molding material in the molding chamber or the molding box, which is used to form a molded part.
  • the molding material used to form the molding is to be filled into the mold chamber or the molding box and then surrounds the mold model 22 and the feeder sleeve 2 '.
  • a solid molded part 26 ' is generated. Due to the telescopic design of the feeder insert 2 ', a relative movement of the feeder element 18' and feeder part 42 '(including cover 20') to one another takes place during the compression of the molding material. In particular, the feeder part 42 'is at least partially pushed over the feeder element 18'.
  • the closed feeder insert 2 'according to the invention is thus compressible along its longitudinal axis 38'.
  • a feeder element is provided which is compressible, in particular irreversibly compressible.
  • the molded part 26' After compacting and the associated production of the molded part 26 ', the molded part 26' is changed in its position, namely rotated or turned.
  • the closed feeder insert 2 ' is thus turned upside down, so that the feeder opening 10 is arranged at the first end 8 above the closed second end 12.
  • it After changing the position or the alignment of the molded part 26 'produced, it is machined in the area of the feeder insert 2' and produced by means of the tool 33 into the compacted molding material of the sprue 35 'and the sprues 32' for a sprue 32 '.
  • the feeder insert 2 is opened at the closed end 12, ie in the region of the cover 20 ', and a sprue opening 34' is formed for the sprue 32 '.
  • a sprue opening 34' is formed for the sprue 32 '.
  • the longitudinal axis 38 'of the feeder sleeve 2 has a vertical orientation in the embodiment shown.
  • the advantageous for use orientation shown in Fig. 10
  • the previously closed feeder insert 2 ' which is now designed as a sprue feeder insert
  • liquid metal 40 is input, via the sprue 32' through the feeder cavity. 6 ', the filter element 16' and the feed opening 10 'in the mold cavity 30' in the molded part 26 'flows.
  • Fig. 1 1 a further, third embodiment of a feeder insert 2 "according to the invention is shown in section.
  • the feeder sleeve 2 has a feeder body 4" which has a feeder cavity 6 "for receiving liquid metal.
  • the feeder insert 2 has a feeder opening 10 at the first end 8 of the feeder body 4".
  • the feeder opening 10 is a connection to the mold cavity 30 "of a molded part 26" (Fig.13).
  • the feeder body 4 is formed closed at the opposite, second end 12.
  • the feeder body 4 is closed by a lid 20 "which is coupled to a feeder element 18".
  • a filter element 16 is arranged, which is adapted to clean over the feeder insert 2 "into the mold cavity 30" of the molded part 26 "filled liquid metal.
  • the filter element 16 has in comparison to the receiving area on the feeder element 18""for the filter element smaller outer dimensions.
  • the filter element 16 " is movable within the feeder sleeve 2".
  • the feeder body 4 " which is composed only of a feeder element 18" and the lid 20 "is formed in two parts in the embodiment shown.
  • the feeder element 18 "and the cover 20" are telescopically displaceable relative to one another.
  • the feeder insert 2 " is thus designed to be compressible in the direction of its longitudinal axis 38".
  • the filter element 16 is held in position by means of a securing element 44 in the interior of the feeder body 4".
  • the securing element 44 is a ring body of a foamed plastic.
  • the material used to form the securing element 44 is a thermally destructible material.
  • holding elements 46 are provided on the feeder element 18 "of the feeder body 4", with which the cover 20 “is held in a starting position relative to the feeder element 18". An unintentionally premature displacement or telescoping of feeder element 18 "and cover 20" to each other is avoided.
  • the holding elements 46 are adapted to break above a certain minimum pressure force from the feeder element 18 "or to be deformed and / or to penetrate into the side wall 14" of the lid 20 ".
  • the feeder insert 2 " similar to Figures 2 and 7 can be seen, placed on a not shown in detail form model with a centering mandrel. Subsequently, the feeder insert 2 "is surrounded by a molding material 28" together with the molding model, which takes place in particular after arranging the feeder insert 2 "in a molding chamber or a molding box, which is also not shown in detail.
  • FIG. 12 shows the feeder insert 2 according to the invention "within a molded part 26 already produced from the compacted molding material 28" and after the removal of the molding model defining the molding cavity 30 "within the molded part 26".
  • At least the feeder insert 2 is turned in the opposite direction to the arrangement consisting of the molded part 26" and the feeder insert 2 "by means of a tool 33 "Opened, in particular the sprue 32", comprising a sprue 34 "on the feeder sleeve 2", a sprue 35 "and a Eingusstümpel 36" (Fig. 13) is generated.
  • the casting process reproducing figures 5, 10 and 13 show only areas of the molding 26, 26 ', 26 "and only sections of a mold required for the production of a casting. To form a complete casting mold, at least one further molded part is required, which delimits the lower, not shown, part of the casting to be produced. LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé pour la fabrication d'un partie de moule (26) dans laquelle est agencé un insert d'alimentation, présentant une carotte de moulage pour le métal liquide pour un moule de coulée divisible pour la coulée métallique, présentant les étapes : • - préparation ou mise à disposition d'une partie de moule (26) en une matière de moulage compactée (28), pourvue d'un insert d'alimentation (2) fermé, l'insert d'alimentation fermé (2) étant disposé de manière fixe dans la matière de moulage compactée (28) de la partie de moule (26) et présentant un ouverture d'alimentation (10) reliée à des zones de l'espace creux de moulage (30) à former et • – ouverture de l'insert d'alimentation (2) fermé de telle sorte qu'une carotte de moulage (32) pour le métal liquide est formée.
EP18807265.6A 2017-12-22 2018-11-19 Procédé de production d'une partie de moule ainsi qu'insert d'alimentation destiné à être utilisé dans un tel procédé Pending EP3727723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017131280.3A DE102017131280A1 (de) 2017-12-22 2017-12-22 Verfahren zum Herstellen eines Formteils sowie Speisereinsatz zur Verwendung in einem solchen Verfahren
PCT/EP2018/081696 WO2019120804A1 (fr) 2017-12-22 2018-11-19 Procédé de production d'une partie de moule ainsi qu'insert d'alimentation destiné à être utilisé dans un tel procédé

Publications (1)

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EP3727723A1 true EP3727723A1 (fr) 2020-10-28

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EP18807265.6A Pending EP3727723A1 (fr) 2017-12-22 2018-11-19 Procédé de production d'une partie de moule ainsi qu'insert d'alimentation destiné à être utilisé dans un tel procédé

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US (1) US11173541B2 (fr)
EP (1) EP3727723A1 (fr)
CN (1) CN111542405B (fr)
DE (1) DE102017131280A1 (fr)
WO (1) WO2019120804A1 (fr)

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CN112570703A (zh) * 2021-01-20 2021-03-30 东台市华裕机械配件有限公司 一种分散旋转式液态铜合金铸造净化装置及其过滤铸造工艺
CN114210931B (zh) * 2021-12-08 2023-09-12 大连华锐重工铸业有限公司 一种具有过滤定位装置的球铁浇注系统及其使用方法
CN115287512B (zh) * 2022-08-09 2023-09-29 超越者新材料科技河北有限公司 一种用于炼钢过程脱硫的含镁低碳锰铁合金及其制备方法

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Publication number Priority date Publication date Assignee Title
CH676094A5 (fr) 1988-02-12 1990-12-14 Fischer Ag Georg
JPH0466244A (ja) * 1990-07-03 1992-03-02 Kiriyuu Kikai Kk 溶湯濾過フィルタを用いる鋳造法および鋳造用溶湯濾過フィルタ
DE9309398U1 (de) * 1993-06-24 1993-08-26 Wagner Heinrich Sinto Masch Vorrichtung für die Herstellung von Öffnungen in einer Gießform
JP3077979B1 (ja) * 1999-09-10 2000-08-21 川崎重工業株式会社 鋳物の砂型仕上げ方法および自動砂型造型装置
DE10039519B4 (de) 2000-08-08 2007-05-31 Chemex Gmbh Speisereinsatz
DE20115140U1 (de) * 2000-11-30 2002-01-31 Luengen Gmbh & Co Kg As Speiser mit einem rohrähnlichen Körper
DE10059481B4 (de) 2000-11-30 2012-02-23 AS Lüngen GmbH Speiser mit einem rohrähnlichen Körper
DE10156571C1 (de) * 2001-11-20 2003-01-16 Gtp Schaefer Giestechnische Pr Speisereinsatz mit Schutzkappe
GB0325134D0 (en) * 2003-10-28 2003-12-03 Foseco Int Improved feeder element for metal casting
SI1567294T1 (sl) * 2003-10-28 2006-08-31 Foseco Int Polnilni element za vlivanje kovine
EP1732719B1 (fr) 2004-03-31 2009-07-01 AS Lüngen GmbH Masselotte a manchon deformable
DE202004009367U1 (de) 2004-06-15 2004-08-19 GTP Schäfer Gießtechnische Produkte GmbH Speiser mit verformbaren Metallfuß
DE102005019385A1 (de) * 2005-04-26 2006-11-02 AS Lüngen GmbH & Co. KG Filterspeiser und Verfahren zur Herstellung einer Giessform
GB0611430D0 (en) 2006-06-09 2006-07-19 Foseco Int Improved feeder element for metal casting
DE102006055988A1 (de) * 2006-11-24 2008-05-29 Chemex Gmbh Speisereinsatz und Speiserelement
DE202013001933U1 (de) 2013-02-15 2014-05-20 Chemex Gmbh Speisereinsatz
DE102015101913B3 (de) 2015-02-10 2016-05-12 Foseco International Limited Eingussspeiser mit integriertem losen Filter, Gusssystem bestehend aus dem Eingussspeiser und einem Formmodell und Verfahren zur Herstellung einer Gussform

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Publication number Publication date
CN111542405A (zh) 2020-08-14
CN111542405B (zh) 2022-10-11
DE102017131280A1 (de) 2019-06-27
US20210086256A1 (en) 2021-03-25
WO2019120804A1 (fr) 2019-06-27
US11173541B2 (en) 2021-11-16

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