EP3917698B1 - Corps de masselotte en une pièce a utiliser lors du coulage de métaux - Google Patents

Corps de masselotte en une pièce a utiliser lors du coulage de métaux Download PDF

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Publication number
EP3917698B1
EP3917698B1 EP20700563.8A EP20700563A EP3917698B1 EP 3917698 B1 EP3917698 B1 EP 3917698B1 EP 20700563 A EP20700563 A EP 20700563A EP 3917698 B1 EP3917698 B1 EP 3917698B1
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EP
European Patent Office
Prior art keywords
feeder
section
feeder body
guide part
sliding
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.)
Active
Application number
EP20700563.8A
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German (de)
English (en)
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EP3917698A1 (fr
EP3917698C0 (fr
Inventor
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
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Chemex Foundry Solutions GmbH
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Publication date
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Publication of EP3917698A1 publication Critical patent/EP3917698A1/fr
Application granted granted Critical
Publication of EP3917698B1 publication Critical patent/EP3917698B1/fr
Publication of EP3917698C0 publication Critical patent/EP3917698C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22C9/08—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
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2023—Nozzles or shot sleeves

Definitions

  • the invention relates to a one-piece feeder body for use as a component of a two-part or multi-part, telescopic riser insert when casting metals, with a riser wall which at least partially delimits a feeder cavity for receiving liquid metal, the riser wall having a passage opening for the liquid metal into the feeder cavity and an outer surface on which at least one outwardly projecting holding element and at least one guide part with a sliding section for a feeder element corresponding to the feeder body are arranged. Furthermore, the invention also relates to a two-part or multi-part riser insert for use in casting metals into casting molds and a kit for producing riser inserts.
  • One-piece riser bodies are used in a variety and variety in casting metals into molds. Such riser bodies are often part of a riser insert, also referred to as a riser system.
  • a riser insert also referred to as a riser system.
  • Such a one-piece feeder body which forms a two-part or multi-part, telescopic feeder insert together with a feeder element in the casting operation, is surrounded on the outside at least in some areas by a molding material used to produce a casting mold, such as molding sand.
  • the feeder body and the feeder insert partially formed from it should be in a fixed position during the casting process held in the mold by the mold cavity to be filled with metal.
  • Known one-piece feeder bodies have a feeder wall, by means of which a feeder cavity for receiving liquid metal is at least partially delimited.
  • the feeder wall of the feeder body usually has an inner surface which at least partially defines the feeder cavity of the feeder insert.
  • the feeder wall also includes a passage opening for the liquid metal into the feeder cavity. During the casting process, a portion of the liquid metal used for casting enters the through-opening.
  • the metal located in the feeder cavity of the feeder insert serves to replenish the casting, which is kept in the liquid state for a certain period of time until the metal present in the casting mold has at least partially solidified.
  • feeder inserts or feeder systems are used, the overall height of which can be changed when the molding material is pressed into a finished molded part.
  • a feeder insert for use in casting metals, which comprises two mold elements which can be moved into one another along its longitudinal axis and which delimit the feeder cavity for receiving the liquid metal.
  • one mold element is inserted into the other mold element or the other mold element is pushed over the one mold element.
  • holding elements are provided on one of the mold elements, which are designed to support the other mold element. If the pressure when pressing the molding material exceeds a predetermined value, the holding elements on one molded part are separated or deformed in such a way that a relative movement between the two molded elements is possible.
  • the relative movement between the feeder body and a feeder element of the feeder insert is controlled by means of at least one guide part arranged on the outer surface of the feeder body.
  • the guide part has a sliding section for a feeder element corresponding to the feeder body, along which, as the molding material is compressed, in particular the inside of the feeder element slides.
  • the guide part usually protrudes from the outer surface of the feeder wall, so that the inside of the feeder element is only partially supported by the feeder wall, namely via the guide part or parts.
  • the guide part which extends over a section along the outer surface of the feeder body, was often at least partially broken off before the feeder body was used as intended. This resulted in the feeder element, which is movably accommodated in relation to the feeder body, then being guided unevenly to the feeder body and thus there is a risk of the feeder element tilting or tilting towards the feeder body.
  • the invention is based on the object of specifying a one-piece feeder body and a feeder insert, by means of which an improved relative movement between the feeder body and the feeder element and thus improved telescoping of the feeder insert, in particular while avoiding the disadvantages described above, is made possible.
  • the invention solves the underlying problem by a feeder body for use as a component of a two-part or multi-part, telescopic feeder insert when casting metals with the features according to claim 1.
  • the guide part has a support section which projects outwards on the outer surface, which, then extends to the sliding section of the guide part for guiding the feeder element in the direction of the passage opening.
  • the invention thus relates to a one-piece feeder body which has a riser wall which at least partially delimits a riser cavity for receiving liquid metal.
  • the feeder wall includes a passage opening for the liquid metal into the feeder cavity.
  • an attachment area for attaching the feeder body to a mold model and/or a mold plate is preferably provided on the outer surface in the area of the passage opening of the feeder wall.
  • the guide part prevents the guide part from breaking off or deforming prematurely before it is used as intended, namely when the inside of the feeder element slides along it.
  • the guide part also better resists the forces that occur during the telescoping of the feeder body and feeder element to one another.
  • the support section extends downwards from the sliding section of the guide part and thus in the direction of the passage opening on the feeder wall.
  • the support section like the guide part, projects on the outer surface of the feeder wall, so that the shoulder at the lower end of the sliding section of the guide part is at least reduced, preferably completely balanced.
  • the sliding section has a sliding surface
  • the support section has an end surface, the sliding surface being inclined at an angle ⁇ 1 to the central axis and the end surface being inclined at an angle ⁇ 2 to the central axis of the passage opening, the angles being in open in opposite directions.
  • the inventive design of the support section it is achieved that during the relative movement of the feeder body and feeder element to one another, no frictional effect occurs on the support section itself through the inside of the feeder element.
  • the sliding surface on the sliding section and the end surface on the supporting section of the feeder body according to the invention are inclined in opposite directions to the central axis of the passage opening.
  • the sliding surface thus preferably widens in the direction of movement of the feeder element moved relative to the feeder body.
  • the widening sliding surface of the guide part thus at least partially counteracts the sliding movement of the feeder element relative to the feeder body.
  • the end surface of the support section is inclined in the opposite direction, so that it is ensured that it does not come into contact with the inside of the feeder element.
  • a plurality of guide parts are arranged on the feeder body according to the invention at an angular distance from one another around the central axis of the passage opening, preferably at a uniform angular distance around the central axis of the passage opening.
  • the provision of several guide parts on the riser wall causes an improved guidance of the feeder element, which can be moved relative to the feeder body.
  • several guide parts preferably evenly distributed on the outer surface of the feeder wall, a friction effect is created that is more evenly distributed along the circumference when the feeder body and feeder element are moved into one another.
  • the feeder body preferably has at least three, four, five or more such guide parts according to the invention on its outer surface.
  • a preferred embodiment of the one-piece feeder body according to the invention provides that five guide parts are arranged on the outer surface with an angular offset of preferably approximately 72 degrees from one another.
  • a preferably precise radial alignment of the longitudinal axis of the feeder element to the longitudinal axis of the feeder body is achieved.
  • preferably five guide parts ensure that in the event of one of the guide parts breaking off on the outside of the feeder wall, the remaining guide parts, in addition to guiding the feeder element relative to the feeder body, can also preferably ensure the radial alignment and thus the desired concentricity between the feeder element and the feeder body.
  • the feeder body according to the invention has a first end defining the passage opening and a second end opposite the passage opening, the support section preferably having a step-free transition to the sliding section and / or ending in the direction of the second end of the feeder body without a step on the outer surface of the feeder wall.
  • the feeder body is preferably positioned on a mold plate with its first end, on which the passage opening for the liquid metal is formed.
  • the feeder body according to the invention is thus fixed during the production of the casting mold relative to the mold plate which determines at least part of the outer contour of the casting mold.
  • the feeder body also has a second, preferably open end, to which the feeder element of a feeder insert, which is movable relative to the feeder body, can be assigned.
  • the connection to the feeder element is preferably achieved via the open end, with the feeder body and feeder element then jointly defining the feeder cavity.
  • a step-free transition is formed between the support section projecting on the outside of the feeder wall and the sliding section of the guide part.
  • a step-free transition between the sliding surface of the sliding section and the end surface of the support section on the guide part also means the provision of an edge, provided that both preferably flat surfaces of the sliding section and Support sections in the transition end at the same height as each other.
  • the support section In the direction of its second end, the support section also has a step-free transition from its end surface to the outer surface of the feeder wall adjacent to the end. This also results in an improved flow of force from the support section into the structure of the feeder wall that supports the support section. This further reduces material failure and the associated breakage of the guide part on the riser wall before or during intended use.
  • a preferred development of the feeder body according to the invention provides that the guide part or parts has an attachment section that extends from the sliding section in the direction of the second end and preferably projects on the outer surface.
  • the attachment section which is arranged at the opposite end of the sliding section in relation to the support section, the attachment or bringing into contact of the feeder element used to form a feeder insert on the feeder body according to the invention is simplified.
  • the attachment area is preferably formed near the second, open end of the feeder body.
  • the attachment areas of the plurality of guide parts distributed along the outer surface of the feeder wall preferably form an outer diameter whose dimensions are smaller than the inner diameter on the inside of the feeder element.
  • the inner diameter of the feeder element preferably has sufficient play in relation to the outer diameter of the attachment areas of the guide parts on the feeder body according to the invention.
  • the attachment section of the guide part has an attachment surface which is inclined at an angle ⁇ 3 to the central axis of the passage opening, which is different from the angle ⁇ 1 of the sliding surface of the sliding section, the angles of inclination of the attachment surface and sliding surface having the same opening direction.
  • the attachment surfaces of the attachment areas on the various guide parts which are inclined to the center axis of the passage opening, the attachment or radial alignment of a feeder element to be attached to the feeder body is further simplified. This makes it easier to assemble a feeder insert, which consists of a feeder body and a feeder element to be joined to the feeder body.
  • the angle of inclination ⁇ 3 of a respective attachment surface of the attachment area is preferably greater than the angle of inclination ⁇ 1 of the sliding surface of the sliding section of the guide part which immediately adjoins the attachment section.
  • the transition area between the attachment surface and the sliding surface on the guide part is also designed to be step-free for easier transfer of the feeder element.
  • the holding element projects outwards directly on the guide part or is arranged protruding outwards adjacent to the guide part on the outer surface.
  • the holding element which holds the feeder element in the starting position relative to the feeder body is preferably formed on the guide part which projects on the outer surface of the feeder body according to the invention.
  • areas of the guide part are used as a base structure for connecting the holding element to the outer surface of the riser wall. This achieves a structurally simple connection of the holding element, which usually projects furthest from the outer surface of the feeder body, to the feeder wall.
  • the holding element can also be arranged separately from the guide part on the outer surface of the feeder wall.
  • the holding element is arranged approximately radially projecting on the sliding section of the guide part, and the support section extends from the holding element in the direction of the first end of the feeder body.
  • the support section also has the function of supporting the holding element on the guide part in the direction of the passage opening. This further reduces the risk of the holding element breaking off prematurely on the guide part.
  • the holding element is preferably arranged on the end region of the sliding section facing the support section. When the feeder body according to the invention is aligned vertically, the holding element is arranged or formed at the lower end of the sliding section of the guide part.
  • the sliding section has a sliding surface which runs approximately parallel to the outer surface of the feeder wall in the direction of extension of the guide part.
  • at least a section of the feeder wall forming the feeder body also has an outer cross section which widens along the longitudinal axis of the feeder body in the direction of the passage opening.
  • the longitudinal axis of the feeder body runs in particular coaxially with the central axis of the passage opening.
  • a uniform gap is preferably formed between the outer surface of the feeder wall of the feeder body according to the invention and an inside of the feeder element corresponding to the feeder body.
  • the guide part or parts have an extension direction that runs approximately parallel to the central axis, with the attachment section and/or the sliding section preferably having a width transverse to the extension direction of the guide part, which widens in the direction of the first end of the feeder body.
  • the width on the attachment surfaces and/or the sliding surfaces increasing in the direction of the sliding movement, the safe sliding during the relative movement of the feeder body and feeder element, during the compaction of the molding material when producing the casting mold, is further improved. Tilting or tilting of a feeder element on or towards the feeder body according to the invention is avoided by the surfaces that preferably widen in the direction of movement.
  • the holding element is preferably arranged evenly spaced from the side edges of the sliding surface on the guide part.
  • the holding element which is preferably arranged centrally on the sliding section, has a width which is in a range of approximately one third to approximately half in relation to the width of the sliding section.
  • Surface areas of the sliding surface are preferably formed on both sides of the holding element.
  • the support section has a width transverse to the direction of extension of the guide part, which decreases in the direction of the first end of the feeder body. This results in an optimized introduction or transmission of the forces absorbed by the support section into the areas of the feeder wall that support the support section.
  • the width of the support section in the extension direction decreases in relation to the largest overall width of the support section in the range from approximately 0.15 to approximately 0.3.
  • the feeder wall has a sleeve section with an outer cross section that widens from the second end in the direction of the first end and an attachment area adjoining the sleeve section for attachment to a mold model or a mold plate with an extension in the direction of the first end tapering cross section.
  • the feeder body is divided into two functional areas. The upper functional area assigned to the second end of the feeder body with its sleeve section enables the relative movement between the feeder body and the feeder element to form a telescopic feeder insert according to the invention.
  • the sleeve section preferably has a height in the direction of the longitudinal axis of the feeder body, which corresponds to approximately half, preferably more than half, of the total height of the feeder body according to the invention.
  • an attachment area is provided on the feeder body according to the invention, which is set up for attachment to a mold model or a mold plate.
  • the attachment area of the feeder body according to the invention also has an outer cross section which tapers starting from the sleeve section in the direction of the first end of the feeder body.
  • the guide part according to the invention with its attachment area, its sliding section, its support section and the holding element arranged on the sliding section extends along the sleeve section from the second end of the feeder body according to the invention in the direction of the transition between the sleeve section and the attachment area of the feeder body.
  • the guide part or parts preferably extend over the entire height of the sleeve section.
  • the upper and lower ends of the guide section each preferably end with the outer circumference of the outer surface of the sleeve section. Accordingly, a step-free transition is formed from the attachment area at the upper end to the sleeve section and from the support section at the lower end to the sleeve section.
  • the attachment surface on the attachment section, the sliding surface on the sliding section and the end surface on the support section have a flat configuration in the extension direction of the guide part and transversely to the extension direction.
  • the sliding surface of the sliding section protrudes approximately 1.5 mm from the outer surface of the feeder wall forming the sleeve section.
  • the attachment surface and the end surface are preferably each inclined to the sliding surface and end at the outer surface of the feeder wall.
  • the holding element forms a semi-cylindrical structural part on the sliding surface, which has a radius of approximately 2 mm and a height of approximately 5 mm with a total height of the guide part of approximately 35 mm and a maximum width of the guide part at its widest point of approximately 10 mm.
  • the dimensions of the guide part and the holding element must be adjusted in relation to the overall height of the guide part in the direction of extension.
  • the feeder body according to the invention is preferably designed to be rotationally symmetrical for use as a lower part of a feeder insert.
  • a rotationally symmetrical feeder body can be arranged within a mold cavity to form a casting mold without any preferred direction.
  • the feeder body according to the invention is designed asymmetrically.
  • a feeder body of a side feeder for use in vertically divisible molds is designed asymmetrically, such a feeder body according to the invention preferably having a center of gravity of the feeder cavity offset from the central axis of the passage opening.
  • Such an asymmetrically designed feeder body also preferably has on its outer surface one or more guide parts according to the invention described in more detail above with their support sections.
  • a one-piece feeder body according to the invention is preferred, wherein the feeder body (i) is formed from exothermic feeder material or comprises exothermic feeder material at least in sections and/or (ii) is formed from insulating feeder material or comprises insulating feeder material in sections.
  • the material located in the riser cavity is preferably kept in a liquid state over a comparatively long period of time.
  • the entire one-piece feeder body is preferably made of an exothermic feeder material.
  • the feeder body according to the invention can also consist entirely or only partially of an insulating feeder material bound with a binder, in particular quartz sand, with which the heat emission from the interior of the riser body is reduced in a simple manner.
  • the feeder insert comprises at least one feeder body according to the invention, which is preferably designed according to one of the above preferred embodiments, and one or more further feeder elements, the feeder body being connected to the one or more feeder elements to form a telescopic feeder insert, and where the feeder body defines the feeder cavity together with the one white or together with at least one of the further feeder elements.
  • the invention thus relates to a multi-part feeder insert, in which the feeder body according to the invention interacts with at least one further feeder element to form the feeder cavity, the feeder body and the at least one feeder element being designed to be telescopic relative to one another.
  • the multi-part feeder insert is composed of the one-piece feeder body and the at least one feeder element.
  • a two-part or multi-part feeder insert is to be understood in particular as meaning a feeder insert composed of the one-piece feeder body according to the invention and at least one individual, further feeder element.
  • the feeder body according to the invention and the at least one further feeder element can be reversibly separated from one another and rejoined together as often as desired before their actual use in a casting mold.
  • a relative movement in the direction of the longitudinal axes of the feeder body and feeder element to one another preferably takes place.
  • a multi-part riser insert also referred to as a "telescopic riser”
  • a part of the riser insert e.g. the riser body
  • a part of the riser insert e.g. B. the feeder body
  • the feeder element is preferably pushed at least in sections over the feeder body, which is preferably fixed on a mold plate or a mold model.
  • the feeder body and feeder element are preferably designed to be regularly non-deformable.
  • Yet another aspect of the present invention relates to a kit for producing feeder inserts, comprising one or more feeder bodies according to one of the preferred embodiments described above, and at least two further feeder elements, which are connected to the feeder body or bodies according to the invention according to one of the preferred embodiments described above correspond in such a way that two or more different feeder inserts can be produced, the feeder cavities of which have different volumes.
  • the invention is based on the additional idea of being able to assemble a single feeder body according to the invention with different feeder elements to form a feeder insert, which are designed differently.
  • the one or more feeder bodies each have a coupling section which is designed to be complementary or corresponding to a respective coupling region of a feeder element to be joined thereto.
  • the coupling areas of the different feeder bodies or the coupling areas of the different feeder elements are preferably designed to be identical.
  • the coupling area on the feeder body has at least one guide part which has a support section which projects outwards on the outer surface and which extends in the direction of the passage opening, preferably adjacent to the sliding section of the guide part for guiding the feeder element
  • the kit according to the invention preferably comprises a centering mandrel which corresponds to the passage opening in the one feeder body or in at least one of the at least two feeder bodies according to one of the preferred embodiments described above.
  • the feeder insert is preferably aligned vertically with the feeder body according to the invention and the feeder element to the mold plate or to the mold model.
  • the centering mandrel preferably has a centering mandrel base which has a shape adapted to the shape of the passage opening.
  • the passage opening comprises a non-cylindrical cross section, but preferably has a cross section, preferably selected from the group consisting of oval, non-round, flattened circle and polygonal
  • the cross section of the centering mandrel base is designed to be complementary to the cross section of the passage opening
  • At least the feeder body or bodies are positively picked up on the centering mandrel.
  • An anti-twist device is preferably created between the centering mandrel and the feeder body or bodies, via which the feeder body can be brought into contact with one another in one or more preferred positions relative to the centering mandrel.
  • the preferred embodiments or developments described for the feeder body according to the invention are at the same time or analogously also preferred embodiments of the feeder insert according to the invention and of the kit for producing a feeder insert.
  • Preferred embodiments or further developments of the feeder insert or the kit for producing a riser insert described herein, which relate to the feeder body, are also preferred embodiments of the feeder body, etc.
  • Fig. 1 shows a one-piece feeder body 1 according to the invention, which is used when casting metals in a casting mold (not shown).
  • the feeder body 1 has a feeder wall 2 with an inner surface 4, which is designed to at least partially form a feeder cavity 42, 42 '( Fig. 4, Fig. 5 ) to limit the absorption of liquid metal.
  • the feeder wall 2 of the feeder body further comprises an outer surface 6, on which at least one guide part 8 for a feeder element 20, 20 'corresponding to the feeder body ( Fig. 4, Fig. 5 ) is arranged.
  • at least one outwardly projecting holding element 10 is provided on the outer surface 6, which is designed to hold the feeder element 20, 20 'in a starting position relative to the feeder body 1.
  • the feeder wall 2 has a passage opening 12 ( Fig. 2 , Fig. 3 ), which is designed to allow liquid metal to flow into the feeder cavity 42, 42 '( Fig. 4, Fig. 5 ) can occur.
  • the feeder body 1 has a sliding section 14 on the guide part 8 for the feeder element 20 corresponding to the feeder body, the guide part 8 further having a support section 16 which projects outwards on the outer surface 6.
  • the support section 16 extends subsequently to the sliding section 14 of the guide part 8 in the direction of the passage opening 12. With the support section 16, the forces acting on the sliding section 14, which is set up to guide the feeder element 20, are safely absorbed and into the adjacent area of the feeder wall 2 is derived.
  • the guide part 8 has an attachment area 18, which also projects outwards on the outer surface 6 of the feeder wall 2.
  • the feeder body 1 also has a first end 22 defining the passage opening 12 and a second end 24 opposite the passage opening.
  • the attachment region 18 extends from the sliding section 14 of the guide part 8 in the direction of the second end 24 on the feeder body 1.
  • the support section 16 and the attachment section 18 are arranged at opposite ends of the sliding section 14.
  • Fig. 2 How out Fig. 2 Several guide parts 8 can be seen at an angular distance from one another about the central axis 26 ( Fig.3 ) of the passage opening 12 arranged around. In the embodiment shown, five guide parts 8 are arranged on the outer surface 6 with an offset of preferably approximately 72 degrees from one another.
  • the holding element 10 projects directly outwards from the guide part 8. All holding elements 10 together form a receptacle for the feeder element 20, which is to be held in a starting position relative to the feeder body.
  • Fig. 3 shows a sectional view of the feeder body 1 according to the invention, which has a sleeve section 28 with an outer cross section that widens from the second end 24 towards the first end 22. Furthermore, the feeder body 1 comprises an attachment area 30 which directly adjoins the sleeve section 28 for attachment to a mold model or a mold plate 50 ( Fig. 4, Fig. 5 ). The attachment area 30 has an outer cross section that tapers from the sleeve section 28 towards the first end 22. As a result, the feeder body forms a reduced contact surface on the mold plate 50 to be brought into contact with the feeder body.
  • the guide part 8 extends along the sleeve section 28. In the embodiment shown, the guide parts 8 extend along the entire height of the sleeve section 28 from the second end 24 of the feeder body 1 to the transition 32 between the sleeve section 28 and the attachment area 30.
  • the sliding section 14 has a sliding surface 34 and the supporting section 16 has an end surface 36.
  • the attachment area 18 has an attachment surface 38 for attaching the feeder element 20 to the second end 24 of the feeder body 1.
  • the holding element 10 is arranged approximately radially projecting on the sliding section 14 of the guide part 8, with the holding element 10 at the lower end of the sliding section when the feeder body according to the invention is arranged vertically 14 of the guide part 8 is arranged.
  • the guide parts 8 have an extension direction which runs approximately parallel to the central axis 26 of the passage opening, the attachment section 18 and the sliding section 14 has a width transverse to the direction of extension of the guide part 8, which widens from the second end 24 towards the first end 22 on the feeder body 1.
  • the support section 16 has a width transverse to the direction of extension of the guide part, which decreases in the direction of the first end 22 of the feeder body 1.
  • the inner surface 4 of the feeder wall 2 is designed such that the feeder cavity formed at least partially by the feeder body 1 ( Fig. 4, Fig. 5 ) narrows from the second end 24 on the feeder body 1 in the direction of the passage opening 12 at the first end 22 of the feeder body.
  • the inner surface 4 has a cross section that tapers in the direction of the passage opening 12.
  • the inner surface 4 has a conical shape in sections.
  • Fig. 3a shows the guide part 8 arranged in the area of the sleeve part 28 on the outer surface 6 in an enlarged illustration.
  • the guide part 8 is shown with a different hatching compared to the remaining feeder wall in order to clarify its specific design.
  • the guide part 8 and the feeder wall 2 are preferably formed in one piece, and there is no structural separation between the individual parts of the feeder body 1, as could be assumed from the different hatchings.
  • the sliding surface 34 of the sliding section 14 runs at an angle ⁇ 1 inclined to the central axis 26 of the passage opening 12 and the end surface 36 of the support section 16 runs at an angle ⁇ 2 inclined to the central axis 26 of the passage opening 12, the angles ⁇ 1 and ⁇ 1 being opened in opposite directions are.
  • the center axis 26 is moved into the feeder wall 2 for simplified representation.
  • the sliding surfaces 34 and the end surfaces 36 of the guide parts 8 are therefore inclined in opposite directions with respect to the central axis 26 of the passage opening 12.
  • the attachment surface 38 runs at an angle ⁇ 3 inclined to the center axis 26 of the passage opening, the inclination angle ⁇ 1 of the sliding surface 34 and the inclination angle ⁇ 3 of the attachment surface 38 having the same opening direction, but being of different sizes relative to the center axis 26 of the passage opening 12.
  • the sliding surface 34 of the sliding section 14 runs in the extension direction of the guide part 8 in the area of the sleeve part 28 approximately parallel to the outer surface 6 of the feeder wall 2.
  • the outer diameter of the outer surface 6 of the feeder wall 2 as well as the circumference defined by the sliding surfaces 34 of the guide parts 8 expands in the area of the sleeve part 28 from the second end 24 towards the first end 22 of the feeder body 1.
  • both the support section 16 and the attachment section 18 of the guide part 8 have a step-free transition to the sliding section 14.
  • the support section 14 runs towards the first end 22 of the feeder body 1 without any offset on the outer surface 6 of the feeder wall 2.
  • the attachment section 18 also runs towards the second end 24 of the feeder body 1 without any offset on the outer surface 6 of the feeder wall 2.
  • a first embodiment of a first feeder insert 40 is shown, which is formed from the feeder body 1 and a first feeder element 20.
  • the feeder body 1 and the feeder element 20 together form a feeder cavity 42 for the liquid metal entering the feeder cavity via the passage opening 12.
  • the feeder body 1 and the feeder element 20 are designed such that the feeder element 20 can be displaced at least in sections on the outside over the feeder body 1.
  • the feeder body 1 can in particular be inserted telescopically into the feeder element 20.
  • the feeder body 1 and the feeder element 20 are held in position relative to one another by means of a centering mandrel 44.
  • a guide part 8 is arranged on the outer surface 6 of the feeder wall 2 of the feeder body 1, by means of which the tilting or tilting of the feeder element 20 relative to the feeder body 1, during the displacement movement of the feeder body 1 and the feeder element 20 relative to one another, is avoided.
  • a holding element 10 is arranged on the guide part 8, by means of which the feeder element 20 is held in a starting position before the feeder element is moved to the feeder body 1.
  • the feeder element 20 has at its upper end 46 a receptacle 48 for the tip of the centering mandrel 44.
  • Fig. 5 shows a second embodiment of a feeder insert 40', which is composed of the feeder body 1 according to the invention and a further feeder element 20' corresponding to the feeder body 1. How Fig. 5 clarified, the feeder body 1 according to the invention can correspond to different feeder elements 20, 20 '.
  • the feeder body 1 and the feeder element 20 ' act with one another in an almost identical form, as shown below Fig. 4 described.
  • the feeder insert 40' points in contrast to the feeder insert 40 Fig. 4 an enlarged feeder cavity 42' for receiving the liquid metal.
  • a receptacle 48' for the centering mandrel 44' is provided at the closed, upper end 46 of the feeder element 20'.
  • Fig. 6 - 9 show an exemplary embodiment of a method for producing at least one molded part of a casting mold, not shown in more detail, wherein a feeder body 1 designed according to the invention is pushed or placed with its passage opening 12 on a centering mandrel 44.
  • the centering mandrel 44 is attached to a mold plate 50, which defines at least surface areas of the molded part to be produced, not shown in detail.
  • the feeder body 1 comes into direct contact with the mold plate 50 via its attachment area 30.
  • the feeder element 20 is placed with its lower end on the attachment section 18 of the guide part 8 and the receptacle 48 at the upper end 46 of the feeder element 20 is pushed over the tip of the centering mandrel 44 and so the feeder element 20 with the feeder body 1 becomes a feeder insert 42 according to the invention composed.
  • the feeder element 20 is moved to its starting position on the feeder body 1 until the feeder element 20 has been brought into contact with the holding elements 10 which project radially outwards on the guide parts 8.
  • a molding material 52 is entered into a mold (not shown).
  • the feeder insert 40 formed from the feeder body 1 and the feeder element 20 is completely surrounded on the outside by the molding material 52.
  • Fig. 9 shows, the molding material 52 is pressed within the mold, whereby the molding material 52, as indicated, is compacted and a solid molded part is formed.
  • the feeder element 20 is displaced parallel to the center axis 26 of the passage opening 12 in the direction of the mold plate 50.
  • the holding elements 10 arranged on the guide parts 8 are separated from the guide part 8.
  • the feeder cavity 42 of the feeder insert 40 becomes smaller.
  • the feeder element 20 also runs on the sliding sections 14 of the guide part 8 (by means of the sliding surfaces 34).
  • Fig.3a trained circumference that widens in the direction of the first end 22 on the feeder body 1.
  • the sliding section or sections 14 protruding from the outer surface 6 of the feeder wall 2 with their sliding surfaces 34 of the guide parts 8 each form a type of ramp for the feeder element 20 which can be pushed over the feeder body 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (15)

  1. Corps de masselotte (1) en une pièce destiné à être utilisé en tant que composant d'un insert de masselotte (40, 40') télescopique en deux ou plusieurs parties lors de la coulée de métaux,
    avec une paroi de masselotte (2), qui délimite au moins en partie un espace creux de masselotte (42, 42') destiné à recevoir du métal liquide, dans lequel la paroi de masselotte (2) possède
    - une ouverture de passage (12) pour le métal liquide dans l'espace creux de masselotte (42, 42'), et
    - une surface extérieure (6), sur laquelle au moins un élément de maintien (10) dépassant vers l'extérieur et au moins une partie de guidage (8) avec une section de glissement (14) pour un élément de masselotte (20, 20') correspondant au corps de masselotte (1) sont disposés,
    dans lequel la partie de guidage (8) présente une section de soutien (16) faisant saillie vers l'extérieur sur la surface extérieure (6), laquelle s'étend en direction de l'ouverture de passage (12) dans le prolongement de la section de glissement (14) de la partie de guidage (8) pour guider l'élément de masselotte (20, 20').
  2. Corps de masselotte (1) selon la revendication 1,
    dans lequel la section de glissement (14) présente une surface de glissement (34) et la section de soutien (16) présente une surface de terminaison (36), dans lequel la surface de glissement (34) s'étend selon un angle (α1) de manière inclinée par rapport à l'axe central (26) et la surface de terminaison (36) s'étend selon un angle (α2) de manière inclinée par rapport à l'axe central (26) de l'ouverture de passage (12), dans lequel les angles (α1, α2) sont ouverts dans des directions opposées.
  3. Corps de masselotte (1) selon la revendication 1 ou 2,
    dans lequel plusieurs parties de guidage (8) sont disposées tout autour de l'axe central de l'ouverture de passage (12) à une distance angulaire les unes par rapport aux autres, de manière préférée à une distance angulaire homogène tout autour de l'axe central (26) de l'ouverture de passage (12).
  4. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel cinq parties de guidage (8) sont disposées avec un décalage de préférence d'environ 72 degrés angulaires les unes par rapport aux autres sur la surface extérieure (6).
  5. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel le corps de masselotte (1) possède une première extrémité (22) définissant l'ouverture de passage (12) et une seconde extrémité (24) faisant face à l'ouverture de passage (12), et
    dans lequel, de manière préférée, la section de soutien (16) présente un passage sans discontinuité menant à la section de glissement (14) et/ou converge en direction de la deuxième extrémité (24) du corps de masselotte (1) sans discontinuité sur la surface extérieure (6) de la paroi de masselotte (2).
  6. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel la ou les parties de guidage (8) présente ou présentent une section de placement (18) s'étendant depuis la section de glissement (14) en direction de la deuxième extrémité (24), faisant saillie de manière préférée sur la surface extérieure (6),
    dans lequel, de préférence, la section de placement (18) de la partie de guidage (8) possède une surface de placement (38), laquelle s'étend selon un angle (α3) de manière inclinée par rapport à l'axe central (26) de l'ouverture de passage (12), qui est différent de l'angle (α1) de la surface de glissement (34) de la section de glissement (14), dans lequel l'angle d'inclinaison de la surface de placement (38) et de la surface de glissement (34) présentent la même direction d'ouverture.
  7. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel l'élément de maintien (10) dépasse vers l'extérieur directement sur la partie de guidage (8) ou est disposé en faisant saillie vers l'extérieur sur la surface extérieure (6) de manière adjacente à la partie de guidage (8).
  8. Corps de masselotte (1) selon l'une quelconque des revendications précédentes 5 à 7,
    dans lequel l'élément de maintien (10) est disposé en dépassant légèrement radialement sur la section de glissement (14) de la partie de guidage (8) et la section de soutien (16) s'étend en partant de l'élément de maintien (10) en direction de la première extrémité (22) du corps de masselotte (1).
  9. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel la section de glissement (14) présente une surface de glissement (34), laquelle s'étend approximativement de manière parallèle par rapport à la surface extérieure (8) de la paroi de masselotte (2) dans la direction d'extension de la partie de guidage (8) .
  10. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel la ou les parties de guidage (8) présentent une direction d'extension s'étendant approximativement de manière parallèle par rapport à l'axe central (26), dans lequel de manière préférée la section de placement (18) et/ou la section de glissement (14) présentent une largeur de manière transversale par rapport à la direction d'extension de la partie de guidage (8), qui s'élargit en direction de la première extrémité (22) du corps de masselotte (1),
    dans lequel de préférence la section de soutien (16) présente une largeur de manière transversale par rapport à la direction d'extension de la partie de guidage (8), qui se réduit en direction de la première extrémité (22) du corps de masselotte (1).
  11. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel la paroi de masselotte (2) présente une section de douille (28) avec une section transversale extérieure s'élargissant depuis la deuxième extrémité (24) en direction de la première extrémité (22) et une zone de placement (30) se raccordant à la section de douille (28), destinée à être placée sur un modèle de moulé ou un panneau moulé (50) avec une section transversale se rétrécissant en direction de la première extrémité (22)
    et/ou
    dans lequel la ou les parties de guidage (8) s'étendent le long de la section de douille (28) depuis la deuxième extrémité (24) du corps de masselotte (1) en direction du passage (32) entre la section de douille (28) et la zone de placement (30).
  12. Corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    dans lequel le corps de masselotte (1)
    (i) est formé à partir d'un matériau de masselotte exothermique ou comprend par endroits un matériau de masselotte exothermique,
    et/ou
    (ii) est formé à partir d'un matériau de masselotte isolant ou comprend par endroits un matériau de masselotte isolant.
  13. Insert de masselotte (40, 40') en deux ou en plusieurs parties destiné à être utilisé lors de la coulée de métaux dans des moules de coulée, comprenant
    - un corps de masselotte (1) selon l'une quelconque des revendications précédentes,
    et
    - un ou plusieurs autres éléments de masselotte (20, 20'),
    dans lequel le corps de masselotte (1) est relié à un ou aux autres éléments de masselotte (20, 20') pour former un insert de masselotte (40, 40') télescopique,
    et
    dans lequel le corps de masselotte (1) définit conjointement avec l'autre ou conjointement avec au moins un des autres éléments de masselotte (20, 20') l'espace creux de masselotte (42, 42').
  14. Ensemble destiné à fabriquer des inserts de masselotte (40, 40'), comprenant
    - un ou plusieurs corps de masselotte (1) selon l'une quelconque des revendications 1 à 12, et
    - au moins deux autres éléments de masselottes (20, 20'), lesquels correspondent au ou aux corps de masselotte (1) selon l'une quelconque des revendications 1 à 12, de telle manière que deux inserts de masselotte (40, 40') différents, ou plus, peuvent être produits, dont les espaces creux de masselotte (42, 42') possèdent des volumes différents.
  15. Ensemble selon la revendication 14, comprenant
    un mandrin de centrage (44, 44'), qui correspond à l'ouverture de passage (12) dans le corps de masselotte (1) ou dans au moins un des au moins deux corps de masselottes (1) selon l'une quelconque des revendications 1 à 12.
EP20700563.8A 2019-01-31 2020-01-09 Corps de masselotte en une pièce a utiliser lors du coulage de métaux Active EP3917698B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019102449.8A DE102019102449A1 (de) 2019-01-31 2019-01-31 Einteiliger Speiserkörper zur Verwendung beim Gießen von Metallen
PCT/EP2020/050360 WO2020156770A1 (fr) 2019-01-31 2020-01-09 Corps de masselotte en une pièce a utiliser lors du coulage de métaux

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EP3917698A1 EP3917698A1 (fr) 2021-12-08
EP3917698B1 true EP3917698B1 (fr) 2023-10-18
EP3917698C0 EP3917698C0 (fr) 2023-10-18

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EP (1) EP3917698B1 (fr)
JP (1) JP7431836B2 (fr)
KR (1) KR20210122781A (fr)
CN (1) CN113382813B (fr)
BR (1) BR112021012754A2 (fr)
DE (1) DE102019102449A1 (fr)
EA (1) EA202191397A1 (fr)
ES (1) ES2969248T3 (fr)
MX (1) MX2021009192A (fr)
WO (1) WO2020156770A1 (fr)

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DE102020132342A1 (de) * 2020-12-04 2022-06-09 Chemex Foundry Solutions Gmbh Speisereinsatz zur Verwendung beim Gießen von Metallen in Gießformen

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JP3097515B2 (ja) * 1995-10-11 2000-10-10 トヨタ自動車株式会社 ダイカスト機
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ES2969248T3 (es) 2024-05-17
CN113382813B (zh) 2024-03-01
WO2020156770A1 (fr) 2020-08-06
CN113382813A (zh) 2021-09-10
EA202191397A1 (ru) 2021-12-31
MX2021009192A (es) 2021-09-08
JP2022518559A (ja) 2022-03-15
EP3917698A1 (fr) 2021-12-08
US20220008985A1 (en) 2022-01-13
DE102019102449A1 (de) 2020-08-06
EP3917698C0 (fr) 2023-10-18
BR112021012754A2 (pt) 2021-09-08
JP7431836B2 (ja) 2024-02-15
KR20210122781A (ko) 2021-10-12

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