EP2483012A1 - Boxless casting form and method for the production thereof - Google Patents

Boxless casting form and method for the production thereof

Info

Publication number
EP2483012A1
EP2483012A1 EP10759644A EP10759644A EP2483012A1 EP 2483012 A1 EP2483012 A1 EP 2483012A1 EP 10759644 A EP10759644 A EP 10759644A EP 10759644 A EP10759644 A EP 10759644A EP 2483012 A1 EP2483012 A1 EP 2483012A1
Authority
EP
European Patent Office
Prior art keywords
mold
bales
casting
openings
molded
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.)
Granted
Application number
EP10759644A
Other languages
German (de)
French (fr)
Other versions
EP2483012B1 (en
Inventor
Jörg MEINBERG
Johann Schmitt
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.)
KSB AG
Original Assignee
KSB AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KSB AG filed Critical KSB AG
Publication of EP2483012A1 publication Critical patent/EP2483012A1/en
Application granted granted Critical
Publication of EP2483012B1 publication Critical patent/EP2483012B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/10—Guiding equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/04—Pattern plates
    • 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

Definitions

  • the invention relates to a boxless, horizontally split mold, with at least two molded bales formed from a molding compound defining a casting cavity.
  • the casting mold is cast in the rising mold, with the casting material passing through a funnel and a pouring channel into the mold to be poured out.
  • the casting material is pressed into the casting mold via a riser from a crucible located below the casting mold.
  • lost molds In the production of castings either lost molds or permanent molds can be used. Lost shapes are destroyed when the casting is removed. These forms are formed from a molding compound. They usually consist of quartz sand in combination with a binder. Permanent molds are commonly used when casting non-ferrous metals in large Quantity must be produced. These molds are made of steel or cast iron or non-ferrous materials.
  • the invention relates to a lost mold.
  • Lost molds can be boxless or have a molding box, which consists of two mold box halves.
  • the invention is a boxless casting mold.
  • Castless casting molds are usually two-part molds. They are used without top and bottom boxes. Only for the production of mold bales and for accurate centering of the upper and lower mold bales mold frames are used, which are then removed again before the casting. For casting then you get a so-called mold block, which has the significant advantage that the very high investment costs for the molding box park omitted.
  • the casting molds are generally cuboid or cube-shaped and have a molding surface or two opposing mold surfaces in which or in which the models are molded. Two molds together form a shape of the casting to be cast.
  • the closed boxless casting molds are placed side by side on a casting line for casting. At the same time, a pouring funnel and a pouring channel are formed in the shaped bales, so that casting can be started directly after the bales have been joined to form the casting molds.
  • the advantage of this caseless casting molds is that a molding box consisting of a lower and upper box is not required.
  • the object of the present invention is to provide a boxless casting mold, in which the orientation of the molded bale to each other can be made quickly and accurately.
  • This object is achieved in that two opposing mold bales have openings and the openings for horizontal alignment of the mold bales form a vertical guide line for a rod-like guide element.
  • the openings are preferably channels that run in the moldballs.
  • the channels may have different cross sections, with round cross sections prove to be particularly favorable.
  • the openings are integrated in areas of the molded bales where they have no connection to the casting cavity.
  • the shaped bales preferably have projections in which the openings are made. These projections are targeted material accumulations of molding material. In the material accumulations continuous openings can be introduced without causing injury to the casting cavity.
  • the projections are formed by a material accumulation of molding material on the side surfaces of the mold bales. With the mold closed, a recess is formed between the protrusions in some embodiments of the invention.
  • the rod-shaped guide member passes through the recess. Within the recess, the guide element is not surrounded by a channel. The guide is accomplished only by the openings in the upper and lower mold bales.
  • the rod-like guide element is preferably a metal rod with a round cross section.
  • the diameter of the metal rod is matched to the diameter of the openings.
  • the diameter of the metal rod must be slightly smaller than the diameter of the openings. It proves to be particularly favorable if this results in a radial clearance of less than 1 mm, preferably less than 0.5 mm around the rod. Thereby, it is possible that the rod can be inserted and moved into the openings and yet a sufficiently precise guidance is achieved.
  • the openings form a guide line for the rod-shaped guide element. Thus, a linear guide of the guide element is achieved.
  • the rod-like guide element is reduced at its front end in its diameter.
  • the front end of the rod is formed as a conical tip. This facilitates the insertion of the rod into the openings.
  • at least one opening is formed funnel-shaped widened on the side facing the opposite mold bale, in order to facilitate the rod entry into the opening.
  • the openings form a vertical guide line for horizontal alignment of the molded bales. The aim of the horizontal alignment is to position the mold bales so that the two casting chamber halves are joined together correctly and thereby form the complete casting cavity, without the halves being shifted horizontally relative to one another.
  • the casting cavity must give the negative image of the casting to be cast.
  • a molded bale has a bead formed from molding compound.
  • the bead forms the positive counterpart to a hollow in the opposite ball of form.
  • the guide line formed by the openings serves a pre-alignment which causes the bead to fit into the cavity.
  • the bead is a geometric shape having a hemispherical front and cylindrical sidewalls.
  • the hemispherical shape facilitates the sliding of the bead into the cavity. Through the cylindrical side walls a fine guidance of the bead is achieved in the cavity.
  • the cavity is designed as a negative counterpart to the bead.
  • the openings are formed so that they form a guide line for a connecting element.
  • the connecting element is preferably a metal rod which is provided with a thread.
  • the thread can either run along the entire bar or be applied only at the two ends of the rod.
  • the clamping of the two mold balls to each other preferably takes place by means of two clamping nuts which are screwed onto the two ends of the rod.
  • a plate-shaped surface presses on the molding material and presses the bales together.
  • either the clamping nut may be formed with a plate-shaped surface or it can be commercially available nuts with a plate-shaped washer are used.
  • a clamping nut can be filled into a molded bale.
  • the plate-shaped surface of the clamping nut is enclosed by molding material.
  • the connecting element is screwed at one end into the clamping nut and protrudes with its other end from the opposite Mold bales out.
  • On the protruding end of a second nut is screwed.
  • molding material is filled in molding boxes and / or mold frames, which are rigid, bending and twist-free parts for receiving and retaining the molding compound compressed therein.
  • the cured molding material is used in the form of endfesten molded bales for sand casting.
  • Such a sand mold consists of at least two molded parts. In horizontally split molds these are referred to as upper and lower bales.
  • bolts are positioned on the fastening elements, which introduce the openings into the mold bales during production of the molded bales.
  • the bolts are arranged so that they place the openings so that they form a vertical guide line for a rod-like guide element for horizontal alignment of the mold bales for two mutually opposite mold bales.
  • the bolts are screwed onto the fastening elements.
  • Fig. 4 a bolt for upper bale of height 220 mm
  • Fig. 5 a fastening element for molded bales in side view
  • Fig. 6 rod-like guide element.
  • FIG. 1 a individual parts of the casting mold according to the invention are shown.
  • the mold consists of a lower mold bale 1 and an upper mold bale 2.
  • an opening 3 is introduced in the lower mold bale 1.
  • the upper mold bale 2 contains an opening 4.
  • the openings 3, 4 form a guide line for the guide element 5.
  • the guide element 5 is formed at its front end as a conical tip 6.
  • the guide element 5 has a round cross section in the exemplary embodiment.
  • the diameter of the guide element 5 is matched to the diameter of the openings 3, 4.
  • the conical tip 6 facilitates insertion of the guide element 5 into the opening 4 of the upper mold bale 2.
  • a pouring basin 7 is introduced in the upper mold bale 2 .
  • the liquid melt is filled.
  • the melt passes into a casting cavity 9, which is bounded by the lower mold bale 1 and the upper mold bale 2.
  • the lower mold bale 1 has a bead 10 on its side facing the upper mold bale 2.
  • the bead 10 formed of molding compound is the positive counterpart to the cavity 11 in the upper mold bale 2.
  • the lower mold bale 1 is also a counterpart 12 for a connecting element 13 (not shown in FIG. 1) integrated.
  • the counterpart 12 in the exemplary embodiment is a clamping nut which is embedded in the mold material with a plate-shaped surface.
  • the opening 3 in the lower mold bale 1 expands to the side facing the upper mold bale 2.
  • the lower mold bale 1 has a projection 14 formed from a material accumulation.
  • the upper mold bale 2 has a projection 15 formed from a material accumulation.
  • the projections 14, 15 are the openings 3, 4th
  • the guide member 5 was inserted through the opening 4 of the upper mold bale 2 and projects into the opening 3 of the lower mold bale. 1
  • the diameter of the internal thread of the counterpart 12 is greater than the outer diameter of the guide element 5, so that the guide element can also be guided through the counterpart 12 and freely movable within the openings 3, 4 and within the counterpart 12.
  • the molded bales 1, 2 are aligned horizontally to each other. To close the mold, the bales 1, 2 must be moved only in the vertical direction to each other. When assembling the molded bales 1, 2 occurs from a certain vertical approach of the bales 1, 2 of the bead 10 in the cavity 1 1 a.
  • the bead 10 is formed on its side facing the upper mold bale 2 as a hemisphere, wherein any other shape is also possible, for example a conical shape.
  • the side walls of bead 10 and cavity 1 1 are cylindrical here and serve as a fine guide when joining the mold bales 1, 2.
  • Fig. 1 c the mold is shown in the closed position.
  • the bead 10 fits seamlessly into the cavity 1 1.
  • a recess 16 forms between the upper and lower mold bales 2, 1 or between the projections 14, 15. Within the recess 16, the guide element 5 is visible.
  • Fig. 2 shows a form of bale variant without projections.
  • the openings 3, 4 are here arranged directly in molded bales 1, 2, which were formed without projections. On the presentation of pouring basin, pouring channel and pouring cavity was omitted here for reasons of clarity.
  • a connecting element 13 extends in the openings 3, 4.
  • the connecting element 13 is in Embodiment to a metal rod with a round cross-section, which is provided at its ends with a thread.
  • the counterparts 12, 16 are designed as clamping nuts, which are screwed with their internal thread with the ends of the connecting element 13.
  • the counterparts 12, 16 exercise by means of plate-shaped discs a contact pressure on the mold bales 1, 2 and press in this way the two halves of the mold together.
  • the counterpart 12 is integrated into the opening 3 of the lower mold bale 1.
  • bolts 17, 18 are shown for a lower mold bale.
  • the bolt 17 is used for a lower bale of height 220 mm.
  • the bolt 18 is used for a lower bale of height 330 mm.
  • the bolts 17, 18 are composed of a lower segment 19, a middle segment 20 and an upper segment 21.
  • the segments 19, 20, 21 are designed in the embodiment as a cylindrical metal body, which are firmly connected.
  • the middle segment 20 has a larger diameter than the other two segments 19, 21.
  • the lower segment 19 is provided with an external thread with which it can be screwed into an internal thread of a fastening screw 22 (shown in FIGS. 5a, 5b) of a molding box or mold frame for the production of a mold bale.
  • the upper segment 21 generates the opening 3.
  • the diameter of the upper segment 21 is matched to the diameter of the guide element 5.
  • the diameter of the upper segment is slightly larger than the diameter of the guide element 5. In the exemplary embodiment, this difference in size is 1 mm, so that upon insertion of the guide member 5 in the opening 3 results in a radial clearance of 0.5 mm.
  • the bolts 23, 24 are shown for the production of an upper mold bale.
  • the bolt 23 is used for an upper mold ball of height 220 mm.
  • the bolt 24 is used for an upper bale of height 330 mm.
  • the bolts 23, 24 are composed of a lower segment 25 and an upper segment 26.
  • the segments 25, 26 are executed in the embodiment as a cylindrical metal body, which are firmly connected.
  • the upper segment 26 has a larger size than the lower segment 25 Diameter.
  • the lower segment 25 is provided with an external thread with which it can be screwed into an internal thread of a fastening screw 22 (shown in FIGS. 5 a, 5b) of a mold frame or molding box for producing a mold bale.
  • the upper segment 26 generates the opening 4.
  • the diameter of the upper segment 26 is matched to the diameter of the guide element 5.
  • the diameter of the upper segment 26 is slightly larger than the diameter of the guide element 5. In the exemplary embodiment, this difference in size is 1 mm, so that upon insertion of the guide member 5 in the opening 4 results in a radial clearance of 0.5 mm.
  • a fastening screw 22 for the production of the molded bales is shown in the side view.
  • the fastening screw is shown as a side view, in Fig. 5 b as a plan view.
  • the head 27 of the fastening screw is composed of side walls and a top. The side walls form a hexagon. The upper part is bevelled.
  • a bore with internal thread 28 is introduced, in which the lower segments 19, 25 of the bolts 17, 18, 23, 24 are screwed.
  • the fastening screw 29 presses on the mold bales.
  • Under the disc-shaped segment 29, a cylindrical segment 20 is arranged.
  • the lower segment 31 of the fastening screw 22 is provided with an external thread onto which a sleeve 32 can be screwed.
  • the rod-like guide element 5 is shown.
  • the front end of the guide member 5 is formed as a conical tip 6.
  • the guide member 33 of the guide member 5 is formed in the embodiment as a cylindrical body to which a handle 34 connects.
  • the handle 34 is angled to the guide member 33.

Landscapes

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

Abstract

The invention relates to a boxless casting form which is separated horizontally. Said casting form consists of a lower casting body and an upper casting body (1, 2). Said casting bodies (1, 2) are formed from dry sand, and define a casting cavity (9). According to the invention, openings (3, 4) are introduced in the casting bodies (1, 2), said openings (3,4) being used to align the casting bodies (1, 2) horizontally thus forming a vertical guide line for a rod-like guide element (5).

Description

Beschreibung  description
Kastenlose Gießform und Verfahren zu ihrer Herstellung Castless casting mold and method for its production
Die Erfindung betrifft eine kastenlose, horizontal geteilte Gießform, mit wenigstens zwei aus einer Formmasse gebildeten Formballen die einen Gießhohlraum begrenzen. The invention relates to a boxless, horizontally split mold, with at least two molded bales formed from a molding compound defining a casting cavity.
Zur Herstellung von Gussstücken benötigt man eine Form, die mit flüssigem Gießmetall gefüllt wird und in der das Gussstück erstarren kann. Der Hohlraum der Form ist das negative Abbild des Gussstückes. Die Zuführung des flüssigen Metalls in den Hohlraum der Gießform erfolgt über eine Zuleitung. Dabei unterscheidet man prinzipiell zwei Varianten der Zuführung des Gießmaterials: Bei der ersten Variante erfolgt das Abgießen der Gießform im steigenden Guss, wobei das Gießmaterial über einen Trichter und einen Eingießkanal in die auszugießende Form gelangt. Bei der zweiten Variante wird aus einem unterhalb der Gießform befindlichem Schmelztiegel das Gießmaterial in die Gießform über ein Steigrohr eingedrückt. For the production of castings, you need a mold that is filled with liquid casting metal and in which the casting can solidify. The cavity of the mold is the negative image of the casting. The supply of liquid metal into the cavity of the mold via a supply line. In principle, two variants of the feeding of the casting material are distinguished: In the first variant, the casting mold is cast in the rising mold, with the casting material passing through a funnel and a pouring channel into the mold to be poured out. In the second variant, the casting material is pressed into the casting mold via a riser from a crucible located below the casting mold.
Bei der Herstellung von Gussstücken können entweder verlorene Formen oder Dauerformen verwendet werden. Verlorene Formen werden bei der Entnahme des Gussstücks zerstört. Diese Formen werden aus einer Formmasse gebildet. Sie bestehen meist aus Quarzsand in Kombination mit einem Bindemittel. Dauerformen werden häufig verwendet, wenn Gussstücke aus Nichteisenmetallen in großer Stückzahl hergestellt werden müssen. Diese Formen bestehen aus Stahl- oder Eisen- Gusswerkstoffen oder Nicht-Eisenwerkstoffe. In the production of castings either lost molds or permanent molds can be used. Lost shapes are destroyed when the casting is removed. These forms are formed from a molding compound. They usually consist of quartz sand in combination with a binder. Permanent molds are commonly used when casting non-ferrous metals in large Quantity must be produced. These molds are made of steel or cast iron or non-ferrous materials.
Die Erfindung betrifft eine verlorene Gießform. The invention relates to a lost mold.
Verlorene Gießformen können kastenlos sein oder aber einen Formkasten aufweisen, der aus zwei Formkastenhälften besteht. Bei der Erfindung handelt es sich um eine kastenlose Gießform. Bei kastenlosen Gießformen handelt es sich um meist zweiteilige Formen. Sie werden ohne Ober- und Unterkästen verwendet. Lediglich für die Herstellung der Formballen sowie zur genauen Zentrierung vom oberen und unteren Formballen werden Formrahmen verwendet, die anschließend vor dem Abguss jedoch wieder entfernt werden. Für den Abguss erhält man dann einen so genannten Formblock, der den wesentlichen Vorteil hat, dass die sehr hohen Investitionskosten für den Formkastenpark entfallen. Lost molds can be boxless or have a molding box, which consists of two mold box halves. The invention is a boxless casting mold. Castless casting molds are usually two-part molds. They are used without top and bottom boxes. Only for the production of mold bales and for accurate centering of the upper and lower mold bales mold frames are used, which are then removed again before the casting. For casting then you get a so-called mold block, which has the significant advantage that the very high investment costs for the molding box park omitted.
Kastenlose Gießformen werden in der Gießerei in zunehmendem Maße eingesetzt. Die Gießformen sind zumeist quader- oder würfelförmig ausgebildet und weisen eine Formfläche oder zwei einander gegenüberliegende Formflächen auf, in der bzw. in denen die Modelle abgeformt sind. Zwei Gießformen ergeben zusammen eine Form des zu gießenden Gussstückes. Die geschlossenen kastenlosen Gießformen werden für den Abguss nebeneinander auf eine Gießstrecke gesetzt. In den Formballen ist gleichzeitig ein Eingusstrichter und ein Eingießkanal mit eingeformt, so dass nach dem Zusammenfügen der Formballen zu den Gießformen unmittelbar mit dem Abguss begonnen werden kann. Der Vorteil dieser kastenlosen Gießformen besteht darin, dass ein aus einem Unter- und Oberkasten bestehender Formkasten nicht erforderlich ist. Castless casting molds are increasingly being used in the foundry. The casting molds are generally cuboid or cube-shaped and have a molding surface or two opposing mold surfaces in which or in which the models are molded. Two molds together form a shape of the casting to be cast. The closed boxless casting molds are placed side by side on a casting line for casting. At the same time, a pouring funnel and a pouring channel are formed in the shaped bales, so that casting can be started directly after the bales have been joined to form the casting molds. The advantage of this caseless casting molds is that a molding box consisting of a lower and upper box is not required.
Vor dem Abguss müssen die Formballen zueinander ausgerichtet und dauerhaft fixiert werden. Diese Ausrichtung ist sehr zeitaufwendig. Aufgabe der vorliegenden Erfindung ist es, eine kastenlose Gießform zu schaffen, bei der die Ausrichtung der Formballen zueinander schnell und präzise vorgenommen werden kann. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass zwei einander gegenüberliegende Formballen Öffnungen aufweisen und die Öffnungen zur horizontalen Ausrichtung der Formballen eine vertikale Führungslinie für ein stabartiges Führungselement bilden. Bei den Öffnungen handelt es sich vorzugsweise um Kanäle, die in den Formballen verlaufen. Die Kanäle können unterschiedliche Querschnitte haben, wobei sich runde Querschnitte als besonders günstig erweisen. Before casting, the bales must be aligned with each other and permanently fixed. This alignment is very time consuming. The object of the present invention is to provide a boxless casting mold, in which the orientation of the molded bale to each other can be made quickly and accurately. This object is achieved in that two opposing mold bales have openings and the openings for horizontal alignment of the mold bales form a vertical guide line for a rod-like guide element. The openings are preferably channels that run in the moldballs. The channels may have different cross sections, with round cross sections prove to be particularly favorable.
Die Öffnungen sind in Bereichen der Formballen integriert an denen sie keine Verbindung zum Gießhohlraum haben. Vorzugsweise weisen dazu die Formballen Vorsprünge auf in denen die Öffnungen eingebracht sind. Bei diesen Vorsprüngen handelt es sich um gezielte Materialanhäufungen an Formmasse. In den Materialanhäufungen können durchgehende Öffnungen eingebracht werden ohne dass es zu einer Verletzung des Gießhohlraums kommt. Die Vorsprünge werden durch eine Materialanhäufung an Formmasse an den Seitenflächen der Formballen gebildet. Bei geschlossener Gießform wird in einigen Ausführungsformen der Erfindung zwischen den Vorsprüngen eine Aussparung gebildet. Das stabförmige Führungselement durchquert die Aussparung. Innerhalb der Aussparung ist das Führungselement nicht von einem Kanal umgeben. Die Führung wird ausschließlich von den Öffnungen im oberen und unteren Formballen bewerkstelligt. The openings are integrated in areas of the molded bales where they have no connection to the casting cavity. For this purpose, the shaped bales preferably have projections in which the openings are made. These projections are targeted material accumulations of molding material. In the material accumulations continuous openings can be introduced without causing injury to the casting cavity. The projections are formed by a material accumulation of molding material on the side surfaces of the mold bales. With the mold closed, a recess is formed between the protrusions in some embodiments of the invention. The rod-shaped guide member passes through the recess. Within the recess, the guide element is not surrounded by a channel. The guide is accomplished only by the openings in the upper and lower mold bales.
Zumindest in einem der beiden gegenüberliegenden Formballen ist ein durchgehender Kanal eingebracht. Der Kanal im Formballengegenstück kann auch nur in einen Teil des Formballens hineinragen. In einer bevorzugten Ausführung der Erfindung sind in beiden Formballen durchgehende Kanäle eingebracht. Bei dem stabartigen Führungselement handelt es sich vorzugsweise um einen Metallstab mit einem runden Querschnitt. Der Durchmesser des Metallstabs wird dabei auf den Durchmesser der Öffnungen abgestimmt. Der Durchmesser des Metallstabs muss etwas geringer sein als der Durchmesser der Öffnungen. Als besonders günstig erweist es sich, wenn sich dadurch ein radiales Spiel von weniger als 1 mm, vorzugsweise weniger als 0,5 mm um den Stab ergibt. Dadurch ist es möglich, dass der Stab in die Öffnungen eingeführt und bewegt werden kann und dennoch eine ausreichend präzise Führung erreicht wird. Die Öffnungen bilden eine Führungslinie für das stabförmige Führungselement. Somit wird eine Linearführung des Führungselements erreicht. At least in one of the two opposing molded bales a continuous channel is introduced. The channel in the Formballengegenstück can also protrude only in a part of the mold. In a preferred embodiment of the invention, continuous channels are introduced in both mold bales. The rod-like guide element is preferably a metal rod with a round cross section. The diameter of the metal rod is matched to the diameter of the openings. The diameter of the metal rod must be slightly smaller than the diameter of the openings. It proves to be particularly favorable if this results in a radial clearance of less than 1 mm, preferably less than 0.5 mm around the rod. Thereby, it is possible that the rod can be inserted and moved into the openings and yet a sufficiently precise guidance is achieved. The openings form a guide line for the rod-shaped guide element. Thus, a linear guide of the guide element is achieved.
In einer besonders vorteilhaften Ausführung der Erfindung ist das stabartige Führungselement an seinem vorderen Ende in seinem Durchmesser reduziert. Vorzugsweise ist das vordere Ende des Stabes als kegelförmige Spitze ausgebildet. Dadurch wird die Einführung des Stabes in die Öffnungen erleichtert. Zudem erweist es sich als günstig, wenn zumindest eine Öffnung an der der gegenüberliegenden Formballen zugewandten Seite trichterförmig erweitert ausgebildet ist, um dem Stab den Eintritt in die Öffnung zu erleichtern. Die Öffnungen bilden eine vertikale Führungslinie zur horizontalen Ausrichtung der Formballen. Ziel der horizontalen Ausrichtung ist es, die Formballen so aufeinander zu positionieren, dass die beiden Gießraumhälften korrekt zusammen gefügt werden und dadurch den vollständigen Gießhohlraum bilden, ohne dass es zu einer horizontalen Verschiebung der Hälften zueinander kommt. Der Gießhohlraum muss dazu das negative Abbild des zu gießenden Gussteil ergeben. Durch die erfindungsgemäße Vorrichtung wird verhindert, dass es zu einer seitlichen Verschiebung der Gießhohlraumhälften und somit zu einen Versatz des Gussteils kommt. Der Einsatz der Erfindung ermöglicht eine rasche horizontale Ausrichtung der Formballen zueinander. In einer besonders vorteilhaften Ausführung der Erfindung weist ein Formballen einen aus Formmasse gebildeten Wulst auf. Der Wulst bildet das positive Gegenstück zu einer Aushöhlung im gegenüberliegenden Formballen. Durch diese Ausführung wird eine Feinführung beim Zusammenfügen der Formballen erreicht. In diesem Fall dient die durch die Öffnungen gebildete Führungslinie einer Vorausrichtung, die bewirkt, dass sich der Wulst in die Aushöhlung einfügt. Bei herkömmlichen Gießformen besteht die Gefahr, dass der Wulst beim Zusammenfügen der Formballen gegenüber der Aushöhlung horizontal verschoben positioniert ist. Dadurch kann es zu einer Beschädigung des Wulstes kommen. Der aus Formmasse gebildete Wulst kann durch den Druck, der beim Zusammenfügen auf ihn ausgewirkt wird, zerstört werden. In a particularly advantageous embodiment of the invention, the rod-like guide element is reduced at its front end in its diameter. Preferably, the front end of the rod is formed as a conical tip. This facilitates the insertion of the rod into the openings. In addition, it proves to be advantageous if at least one opening is formed funnel-shaped widened on the side facing the opposite mold bale, in order to facilitate the rod entry into the opening. The openings form a vertical guide line for horizontal alignment of the molded bales. The aim of the horizontal alignment is to position the mold bales so that the two casting chamber halves are joined together correctly and thereby form the complete casting cavity, without the halves being shifted horizontally relative to one another. The casting cavity must give the negative image of the casting to be cast. By means of the device according to the invention it is prevented that there is a lateral displacement of the casting cavity halves and thus an offset of the casting. The use of the invention allows rapid horizontal alignment of the mold balls to each other. In a particularly advantageous embodiment of the invention, a molded bale has a bead formed from molding compound. The bead forms the positive counterpart to a hollow in the opposite ball of form. Through this design is achieved a fine guide when joining the bales. In this case, the guide line formed by the openings serves a pre-alignment which causes the bead to fit into the cavity. In conventional casting molds, there is a risk that the bead is positioned horizontally displaced with respect to the cavity during assembly of the molded bales. This can damage the bead. The bead formed from molding compound can be destroyed by the pressure applied to it during assembly.
Vorzugsweise handelt es sich bei dem Wulst um eine geometrische Form mit einer halbkugelförmigen Vorderseite und zylindrischen Seitenwänden. Die Halbkugelform erleichtert das Hineingleiten des Wulstes in den Hohlraum. Durch die zylindrischen Seitenwände wird eine Feinführung des Wulstes im Hohlraum erreicht. Der Hohlraum ist dabei als negatives Gegenstück zum Wulst ausgebildet. Preferably, the bead is a geometric shape having a hemispherical front and cylindrical sidewalls. The hemispherical shape facilitates the sliding of the bead into the cavity. Through the cylindrical side walls a fine guidance of the bead is achieved in the cavity. The cavity is designed as a negative counterpart to the bead.
Bei einer besonders vorteilhaften Ausführung der Erfindung sind die Öffnungen so ausgebildet, dass sie eine Führungslinie für ein Verbindungselement bilden. Über das Verbindungselement sind die Formballen mittels zweier Gegenstücke verspannbar. Bei dem Verbindungselement handelt es sich vorzugsweise um einen Metallstab, der mit einem Gewinde versehen ist. Das Gewinde kann entweder entlang des gesamten Stabes verlaufen oder nur an den beiden Enden des Stabes aufgebracht sein. Die Verspannung der beiden Formballen zueinander erfolgt vorzugsweise mittels zweier Spannmuttern, die auf die beiden Endes des Stabes aufgeschraubt werden. Eine tellerförmige Fläche drückt auf das Formmaterial und presst die Ballen zusammen. Dabei kann entweder die Spannmutter mit einer tellerförmigen Fläche ausgebildet sein oder es können handelsübliche Muttern mit einer tellerförmigen Unterlegscheibe zum Einsatz kommen. In a particularly advantageous embodiment of the invention, the openings are formed so that they form a guide line for a connecting element. About the connecting element, the molded bales are clamped by means of two counterparts. The connecting element is preferably a metal rod which is provided with a thread. The thread can either run along the entire bar or be applied only at the two ends of the rod. The clamping of the two mold balls to each other preferably takes place by means of two clamping nuts which are screwed onto the two ends of the rod. A plate-shaped surface presses on the molding material and presses the bales together. In this case, either the clamping nut may be formed with a plate-shaped surface or it can be commercially available nuts with a plate-shaped washer are used.
Als besonders günstig erweist es sich, wenn zumindest ein Gegenstück in einem der Formballen integriert ist. Dazu kann eine Spannmutter in einen Formballen eingefüllt werden. Die tellerförmige Fläche der Spannmutter ist dabei von Formmasse eingeschlossen. Das Verbindungselement wird an einem Ende in die Spannmutter eingeschraubt und ragt mit seinem anderen Ende aus dem gegenüberliegenden Formballen heraus. Auf das herausragende Ende wird eine zweite Spannmutter aufgeschraubt. Durch Anziehen der Spannmuttern werden die Formballen gegeneinander verspannt. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung der erfindungsgemäßen Gießform. Bei diesem Verfahren wird Formmasse in Formkästen und/oder Formrahmen gefüllt, wobei es sich um starre, biegungs- und verdrehungsfreie Teile zur Aufnahme und zum Festhalten der darin verdichteten Formmasse handelt. Die ausgehärtete Formmasse wird in Form von endfesten Formballen zur Sandgussfertigung verwendet. Eine solche Sandform besteht aus mindestens zwei Formteilen. Bei horizontal geteilten Gießformen werden diese als Ober- und Unterballen bezeichnet. It proves to be particularly favorable if at least one counterpart is integrated in one of the molded bales. For this purpose, a clamping nut can be filled into a molded bale. The plate-shaped surface of the clamping nut is enclosed by molding material. The connecting element is screwed at one end into the clamping nut and protrudes with its other end from the opposite Mold bales out. On the protruding end of a second nut is screwed. By tightening the clamping nuts, the bales are braced against each other. The invention further relates to a method for producing the casting mold according to the invention. In this process, molding material is filled in molding boxes and / or mold frames, which are rigid, bending and twist-free parts for receiving and retaining the molding compound compressed therein. The cured molding material is used in the form of endfesten molded bales for sand casting. Such a sand mold consists of at least two molded parts. In horizontally split molds these are referred to as upper and lower bales.
Zur Herstellung der erfindungsgemäßen Gießform werden bei dem erfindungsgemäßen Herstellungsverfahren an den Befestigungselementen Bolzen positioniert, die bei der Herstellung der Formballen die Öffnungen in die Formballen einbringen. Erfindungsgemäß werden die Bolzen so angeordnet, dass sie die Öffnungen so platzieren, dass sie für zwei einander gegenüberliegende Formballen eine vertikale Führungslinie für ein stabartiges Führungselement zur horizontalen Ausrichtung der Formballen bilden. To produce the casting mold according to the invention, in the production method according to the invention, bolts are positioned on the fastening elements, which introduce the openings into the mold bales during production of the molded bales. According to the invention, the bolts are arranged so that they place the openings so that they form a vertical guide line for a rod-like guide element for horizontal alignment of the mold bales for two mutually opposite mold bales.
In einer besonders günstigen Ausführung der Erfindung werden die Bolzen auf den Befestigungselementen aufgeschraubt. In a particularly favorable embodiment of the invention, the bolts are screwed onto the fastening elements.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand von Figuren und aus den Figuren selbst. Dabei zeigt: Further features and advantages of the invention will become apparent from the description of embodiments with reference to figures and from the figures themselves. It shows:
Fig. 1 a Einzelteile der Gießform, 1 a parts of the mold,
Fig. 1 b Ausrichtung der Formballen durch Einführung des stabartigen Führungselements,  1 b alignment of the molded bales by introduction of the rod-like guide element,
Fig. 1 c Geschlossene Gießform mit Führungselement, 1 c closed mold with guide element,
Fig. 2 Verspannung der Formballen durch Verbindungselement,  2 clamping of the molded bales by connecting element,
Fig. 3 a Bolzen für unteren Formballen der Höhe 220 mm, Fig. 3 b Bolzen für unteren Formballen der Höhe 330 mm 3 a bolt for lower bales of height 220 mm, Fig. 3 b bolt for lower bale of height 330 mm
Fig. 4 a Bolzen für oberen Formballen der Höhe 220 mm  Fig. 4 a bolt for upper bale of height 220 mm
Fig. 4 b Bolzen für oberen Formballen der Höhe 330 mm  Fig. 4 b bolt for upper bale of height 330 mm
Fig. 5 a Befestigungselement für Formballen in Seitenansicht  Fig. 5 a fastening element for molded bales in side view
Fig. 5 b Befestigungselement für Formballen in Draufsicht, 5 b fastening element for shaped bales in plan view,
Fig. 6 Stabartiges Führungselement.  Fig. 6 rod-like guide element.
In Fig. 1 a sind Einzelteile der erfindungsgemäßen Gießform dargestellt. Die Gießform besteht aus einem unteren Formballen 1 und einem oberen Formballen 2. Im unteren Formballen 1 ist eine Öffnung 3 eingebracht. Der obere Formballen 2 enthält eine Öffnung 4. Bei korrekter Positionierung der Formballen 1 , 2 zueinander bilden die Öffnungen 3, 4 eine Führungslinie für das Führungselement 5. Das Führungselement 5 ist an seinem vorderen Ende als kegelförmige Spitze 6 ausgebildet. Das Führungselement 5 hat im Ausführungsbeispiel einen runden Querschnitt. Der Durchmesser des Führungselements 5 ist auf den Durchmesser der Öffnungen 3, 4 abgestimmt. Die kegelförmige Spitze 6 erleichtert das Einführen des Führungselements 5 in die Öffnung 4 des oberen Formballens 2. In Fig. 1 a, individual parts of the casting mold according to the invention are shown. The mold consists of a lower mold bale 1 and an upper mold bale 2. In the lower mold bale 1, an opening 3 is introduced. The upper mold bale 2 contains an opening 4. With correct positioning of the mold bales 1, 2 to each other, the openings 3, 4 form a guide line for the guide element 5. The guide element 5 is formed at its front end as a conical tip 6. The guide element 5 has a round cross section in the exemplary embodiment. The diameter of the guide element 5 is matched to the diameter of the openings 3, 4. The conical tip 6 facilitates insertion of the guide element 5 into the opening 4 of the upper mold bale 2.
Im oberen Formballen 2 ist ein Gießtümpel 7 eingebracht. In den Gießtümpel 7 wird die flüssige Schmelze gefüllt. Über einen Eingießkanal 8 gelangt die Schmelze in einen Gießhohlraum 9, der vom unteren Formballen 1 und vom oberen Formballen 2 begrenzt wird. Der untere Formballen 1 weist an seiner dem oberen Formballen 2 zugewandten Seite einen Wulst 10 auf. Bei dem aus Formmasse gebildeten Wulst 10 handelt es sich um das positive Gegenstück zur Aushöhlung 1 1 im oberen Formballen 2. In the upper mold bale 2 a pouring basin 7 is introduced. In the pouring basin 7, the liquid melt is filled. Via a pouring channel 8, the melt passes into a casting cavity 9, which is bounded by the lower mold bale 1 and the upper mold bale 2. The lower mold bale 1 has a bead 10 on its side facing the upper mold bale 2. The bead 10 formed of molding compound is the positive counterpart to the cavity 11 in the upper mold bale 2.
Im unteren Formballen 1 ist weiterhin ein Gegenstück 12 für ein Verbindungselement 13 (in den Fig. 1 nicht dargestellt) integriert. Bei dem Gegenstück 12 handelt es sich im Ausführungsbeispiel um eine Spannmutter, die mit einer tellerförmigen Fläche im Formmaterial eingebettet ist. Die Öffnung 3 im unteren Formballen 1 erweitert sich zu der dem oberen Formballen 2 zugewandten Seite. Der untere Formballen 1 weist einen aus einer Materialanhäufung gebildeten Vorsprung 14 auf. Der obere Formballen 2 weist einen aus einer Materialanhäufung gebildeten Vorsprung 15 auf. In den Vorsprüngen 14, 15 befinden sich die Öffnungen 3, 4. In the lower mold bale 1 is also a counterpart 12 for a connecting element 13 (not shown in FIG. 1) integrated. The counterpart 12 in the exemplary embodiment is a clamping nut which is embedded in the mold material with a plate-shaped surface. The opening 3 in the lower mold bale 1 expands to the side facing the upper mold bale 2. The lower mold bale 1 has a projection 14 formed from a material accumulation. The upper mold bale 2 has a projection 15 formed from a material accumulation. In the projections 14, 15 are the openings 3, 4th
In Fig. 1 b wurde das Führungselement 5 durch die Öffnung 4 des oberen Formballens 2 hindurch gesteckt und ragt in die Öffnung 3 des unteren Formballens 1 . Der Durchmesser des Innengewindes des Gegenstückes 12 ist größer als der Außendurchmesser des Führungselements 5, so dass das Führungselement auch durch das Gegenstück 12 hindurch führbar und innerhalb der Öffnungen 3, 4 und innerhalb des Gegenstücks 12 frei bewegbar ist. In der in Fig. 1 b dargestellten Position sind die Formballen 1 , 2 horizontal zueinander ausgerichtet. Zum Schließen der Gießform müssen die Formballen 1 , 2 nur noch in vertikaler Richtung zueinander verschoben werden. Beim Zusammenfügen der Formballen 1 , 2 tritt ab einer bestimmten vertikalen Annäherung der Formballen 1 , 2 der Wulst 10 in die Aushöhlung 1 1 ein. Der Wulst 10 ist an seiner dem oberem Formballen 2 zugewandten Seite als Halbkugel ausgebildet, wobei jede andere Form auch möglich ist, beispielsweise eine kegelige Form. Die Seitenwände von Wulst 10 und Aushöhlung 1 1 sind hier zylinderförmig ausgebildet und dienen als Feinführung beim Zusammenfügen der Formballen 1 , 2. In Fig. 1 c ist die Gießform in geschlossener Stellung dargestellt. Der Wulst 10 fügt sich nahtlos in die Aushöhlung 1 1 ein. Von den Formballen 1 , 2 wird der Gießhohlraum 9 begrenzt, der die Form des zu fertigenden Werkstücks aufweist. Bei geschlossener Gießform entsteht zwischen oberen und unteren Formballen 2, 1 oder zwischen den Vorsprüngen 14, 15 eine Aussparung 16. Innerhalb der Aussparung 16 ist das Führungselement 5 sichtbar. In Fig. 1 b, the guide member 5 was inserted through the opening 4 of the upper mold bale 2 and projects into the opening 3 of the lower mold bale. 1 The diameter of the internal thread of the counterpart 12 is greater than the outer diameter of the guide element 5, so that the guide element can also be guided through the counterpart 12 and freely movable within the openings 3, 4 and within the counterpart 12. In the position shown in Fig. 1 b, the molded bales 1, 2 are aligned horizontally to each other. To close the mold, the bales 1, 2 must be moved only in the vertical direction to each other. When assembling the molded bales 1, 2 occurs from a certain vertical approach of the bales 1, 2 of the bead 10 in the cavity 1 1 a. The bead 10 is formed on its side facing the upper mold bale 2 as a hemisphere, wherein any other shape is also possible, for example a conical shape. The side walls of bead 10 and cavity 1 1 are cylindrical here and serve as a fine guide when joining the mold bales 1, 2. In Fig. 1 c, the mold is shown in the closed position. The bead 10 fits seamlessly into the cavity 1 1. Of the molded bales 1, 2 of the casting cavity 9 is limited, which has the shape of the workpiece to be manufactured. When the mold is closed, a recess 16 forms between the upper and lower mold bales 2, 1 or between the projections 14, 15. Within the recess 16, the guide element 5 is visible.
Fig. 2 zeigt eine Formballenvariante ohne Vorsprünge. Die Öffnungen 3, 4 sind hier direkt in Formballen 1 , 2 angeordnet, die ohne Vorsprünge ausgebildet wurden. Auf die Darstellung von Gießtümpel, Eingießkanal und Gießhohlraum wurde hier aus Gründen einer besseren Übersichtlichkeit verzichtet. Bei der Gießform gemäß Fig. 2 verläuft in den Öffnungen 3, 4 ein Verbindungselement 13. Mittels zweier Gegenstücke 12, 16 sind die Formballen 1 , 2 verspannbar. Bei dem Verbindungselement 13 handelt es sich im Ausführungsbeispiel um einen Metallstab mit einem runden Querschnitt, der an seinen Enden mit einem Gewinde versehen ist. Die Gegenstücke 12, 16 sind als Spannmuttern ausgeführt, die mit ihrem Innengewinde mit den Enden des Verbindungselements 13 verschraubt sind. Die Gegenstücke 12, 16 üben mittels tellerförmiger Scheiben eine Anpresskraft auf die Formballen 1 , 2 aus und pressen auf diese Weise die beiden Hälften der Gießform zusammen. Im Ausführungsbeispiel ist das Gegenstück 12 in die Öffnung 3 des unteren Formballens 1 integriert. Fig. 2 shows a form of bale variant without projections. The openings 3, 4 are here arranged directly in molded bales 1, 2, which were formed without projections. On the presentation of pouring basin, pouring channel and pouring cavity was omitted here for reasons of clarity. In the casting mold according to FIG. 2, a connecting element 13 extends in the openings 3, 4. By means of two counterparts 12, 16, the molded bales 1, 2 can be clamped. The connecting element 13 is in Embodiment to a metal rod with a round cross-section, which is provided at its ends with a thread. The counterparts 12, 16 are designed as clamping nuts, which are screwed with their internal thread with the ends of the connecting element 13. The counterparts 12, 16 exercise by means of plate-shaped discs a contact pressure on the mold bales 1, 2 and press in this way the two halves of the mold together. In the exemplary embodiment, the counterpart 12 is integrated into the opening 3 of the lower mold bale 1.
In den Fig. 3 a, 3 b sind Bolzen 17, 18 für einen unteren Formballen dargestellt. Der Bolzen 17 wird für einen unteren Formballen der Höhe 220 mm eingesetzt. Der Bolzen 18 wird für einen unteren Formballen der Höhe 330 mm eingesetzt. Die Bolzen 17, 18 setzen sich aus einem unteren Segment 19, einem mittleren Segment 20 und einem oberen Segment 21 zusammen. Die Segmente 19, 20, 21 sind im Ausführungsbeispiel als zylinderförmige Metallkörper ausgeführt, die fest miteinander verbunden sind. Das mittlere Segment 20 hat gegenüber den anderen beiden Segmenten 19, 21 einen größeren Durchmesser. Das untere Segment 19 ist mit einem Außengewinde versehen mit dem es in ein Innengewinde einer Befestigungsschraube 22 (dargestellt in den Fig. 5 a, Fig. 5b) eines Formkasten oder Formrahmens für die Herstellung eines Formballens einschraubbar ist. Das obere Segment 21 erzeugt die Öffnung 3. Der Durchmesser des oberen Segments 21 ist auf den Durchmesser des Führungselements 5 abgestimmt. Der Durchmesser des oberen Segments ist dabei etwas größer als der Durchmesser des Führungselements 5. Im Ausführungsbeispiel beträgt dieser Größenunterschied 1 mm, so dass sich bei Einführen des Führungselements 5 in die Öffnung 3 ein radiales Spiel von 0,5 mm ergibt. In Figs. 3 a, 3 b bolts 17, 18 are shown for a lower mold bale. The bolt 17 is used for a lower bale of height 220 mm. The bolt 18 is used for a lower bale of height 330 mm. The bolts 17, 18 are composed of a lower segment 19, a middle segment 20 and an upper segment 21. The segments 19, 20, 21 are designed in the embodiment as a cylindrical metal body, which are firmly connected. The middle segment 20 has a larger diameter than the other two segments 19, 21. The lower segment 19 is provided with an external thread with which it can be screwed into an internal thread of a fastening screw 22 (shown in FIGS. 5a, 5b) of a molding box or mold frame for the production of a mold bale. The upper segment 21 generates the opening 3. The diameter of the upper segment 21 is matched to the diameter of the guide element 5. The diameter of the upper segment is slightly larger than the diameter of the guide element 5. In the exemplary embodiment, this difference in size is 1 mm, so that upon insertion of the guide member 5 in the opening 3 results in a radial clearance of 0.5 mm.
In den Fig. 4 a, 4 b sind die Bolzen 23, 24 für die Herstellung eines oberen Formballens dargestellt. Der Bolzen 23 wird für einen oberen Formballen der Höhe 220 mm eingesetzt. Der Bolzen 24 wird für einen oberen Formballen der Höhe 330 mm eingesetzt. Die Bolzen 23, 24 setzen sich aus einem unteren Segment 25 und einem oberen Segment 26 zusammen. Die Segmente 25, 26 sind im Ausführungsbeispiel als zylinderförmige Metallkörper ausgeführt, die fest miteinander verbunden sind. Das obere Segment 26 hat gegenüber dem unteren Segment 25 einen größeren Durchmesser. Das untere Segment 25 ist mit einem Außengewinde versehen mit dem es in ein Innengewinde einer Befestigungsschraube 22 (dargestellt in den Fig. 5 a, Fig. 5b) eines Formrahmens oder Formkasten zur Herstellung eines Formballens einschraubbar ist. Das obere Segment 26 erzeugt die Öffnung 4. Der Durchmesser des oberen Segments 26 ist auf den Durchmesser des Führungselements 5 abgestimmt. Der Durchmesser des oberen Segments 26 ist dabei etwas größer als der Durchmesser des Führungselements 5. Im Ausführungsbeispiel beträgt dieser Größenunterschied 1 mm, so dass sich beim Einführen des Führungselements 5 in die Öffnung 4 ein radiales Spiel von 0,5 mm ergibt. 4 a, 4 b, the bolts 23, 24 are shown for the production of an upper mold bale. The bolt 23 is used for an upper mold ball of height 220 mm. The bolt 24 is used for an upper bale of height 330 mm. The bolts 23, 24 are composed of a lower segment 25 and an upper segment 26. The segments 25, 26 are executed in the embodiment as a cylindrical metal body, which are firmly connected. The upper segment 26 has a larger size than the lower segment 25 Diameter. The lower segment 25 is provided with an external thread with which it can be screwed into an internal thread of a fastening screw 22 (shown in FIGS. 5 a, 5b) of a mold frame or molding box for producing a mold bale. The upper segment 26 generates the opening 4. The diameter of the upper segment 26 is matched to the diameter of the guide element 5. The diameter of the upper segment 26 is slightly larger than the diameter of the guide element 5. In the exemplary embodiment, this difference in size is 1 mm, so that upon insertion of the guide member 5 in the opening 4 results in a radial clearance of 0.5 mm.
In den Fig. 5 a und Fig. 5 b ist eine Befestigungsschraube 22 für die Herstellung der Formballen in der Seitenansicht dargestellt. In Fig. 5 a ist die Befestigungsschraube als Seitenansicht, in Fig. 5 b als Draufsicht dargestellt. Der Kopf 27 der Befestigungsschraube setzt sich aus Seitenwänden und einem Oberteil zusammen. Die Seitenwände bilden ein Sechseck. Das Oberteil ist angeschrägt. Im Kopf 27 der Befestigungsschraube 22 ist eine Bohrung mit Innengewinde 28 eingebracht, in das die unteren Segmente 19, 25 der Bolzen 17, 18, 23, 24 einschraubbar sind. Mit einem scheibenförmigen Segment 29 drückt die Befestigungsschraube 29 auf die Formballen. Unter dem scheibenförmigen Segment 29 ist ein zylindrisches Segment 20 angeordnet. Das untere Segment 31 der Befestigungsschraube 22 ist mit einem Außengewinde versehen, auf das eine Hülse 32 aufschraubbar ist. In FIGS. 5 a and 5 b, a fastening screw 22 for the production of the molded bales is shown in the side view. In Fig. 5 a, the fastening screw is shown as a side view, in Fig. 5 b as a plan view. The head 27 of the fastening screw is composed of side walls and a top. The side walls form a hexagon. The upper part is bevelled. In the head 27 of the fastening screw 22, a bore with internal thread 28 is introduced, in which the lower segments 19, 25 of the bolts 17, 18, 23, 24 are screwed. With a disk-shaped segment 29, the fastening screw 29 presses on the mold bales. Under the disc-shaped segment 29, a cylindrical segment 20 is arranged. The lower segment 31 of the fastening screw 22 is provided with an external thread onto which a sleeve 32 can be screwed.
In Fig.6 ist das stabartige Führungselement 5 dargestellt. Das vordere Ende des Führungselements 5 ist als kegelförmige Spitze 6 ausgebildet. Der Führungsteil 33 des Führungselements 5 ist im Ausführungsbeispiel als zylinderförmiger Körper ausgebildet, an den sich ein Haltegriff 34 anschließt. Der Haltegriff 34 ist zum Führungsteil 33 abgewinkelt. 6, the rod-like guide element 5 is shown. The front end of the guide member 5 is formed as a conical tip 6. The guide member 33 of the guide member 5 is formed in the embodiment as a cylindrical body to which a handle 34 connects. The handle 34 is angled to the guide member 33.

Claims

Patentansprüche  claims
Kastenlose Gießfornn und Verfahren zu ihrer Herstellung Castless casting molds and process for their production
Kastenlose, horizontal geteilte Gießfornn, mit wenigstens zwei aus einer Formmasse gebildeten Formballen (1 , 2), die einen Gießhohlraum (9) begrenzen, dadurch gekennzeichnet, dass zwei einander gegenüberliegende Formballen (1 , 2) Öffnungen (3, 4) aufweisen und die Öffnungen (3, 4) zur horizontalen Ausrichtung der Formballen (1 , 2) eine vertikale Führungslinie für ein stabartiges Führungselement (5) bilden. Castless, horizontally split Gießfornn, with at least two formed from a molding compound molding balls (1, 2) defining a casting cavity (9), characterized in that two opposing molded bales (1, 2) have openings (3, 4) and the Openings (3, 4) for horizontal alignment of the mold bales (1, 2) form a vertical guide line for a rod-like guide element (5).
Gießform nach Anspruch 1 , dadurch gekennzeichnet, dass die Öffnungen (3, 4) zur Verspannung der Formballen (1 , 2) eine vertikale Führungslinie für ein Verbindungselement (13) bilden. Casting mold according to claim 1, characterized in that the openings (3, 4) for clamping the mold bales (1, 2) form a vertical guide line for a connecting element (13).
Gießform nach Anspruch 2, dadurch gekennzeichnet, dass die Formballen (1 , 2) über das Verbindungselement (13) mittels zweier Gegenstücke (12, 16) verspannbar sind. Casting mold according to claim 2, characterized in that the molded bales (1, 2) can be braced via the connecting element (13) by means of two counterparts (12, 16).
Gießform nach Anspruch 3, dadurch gekennzeichnet, dass zumindest ein Gegenstück (12) innerhalb der Öffnung (3) eines Formballens (1 ) integriert ist. Casting mold according to claim 3, characterized in that at least one counterpart (12) is integrated within the opening (3) of a forming bale (1).
Gießform nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Formballen (1 ) einen aus Formmasse gebildeten Wulst (10) aufweist, der das positive Gegenstück zu einer Aushöhlung (1 1 ) im gegenüberliegenden Formballen (2) bildet. Casting mold according to one of claims 1 to 4, characterized in that a molded bale (1) has a bead formed from molding compound (10) which forms the positive counterpart to a cavity (1 1) in the opposite mold bale (2).
6. Gießfornn nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Formballen (1 , 2) aus einer Materialanhäufung an Formmasse gebildete Vorsprünge (14, 15) aufweisen, in denen die Öffnungen (3, 4) integriert sind. 6. Gießfornn according to one of claims 1 to 5, characterized in that the molded bales (1, 2) of a material accumulation of molding material formed projections (14, 15), in which the openings (3, 4) are integrated.
7. Gießfornn nach Anspruch 6, dadurch gekennzeichnet, dass bei geschlossener Gießfornn zwischen den Vorsprüngen (14, 15) eine Aussparung (16) gebildet wird. 7. Gießfornn according to claim 6, characterized in that with closed Gießfornn between the projections (14, 15) has a recess (16) is formed.
8. Gießfornn nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das stabartige Führungselement (5) an seinem vorderen Ende als kegelförmige Spitze (6) ausgebildet ist. 8. Gießfornn according to one of claims 1 to 7, characterized in that the rod-like guide element (5) is formed at its front end as a conical tip (6).
9. Gießform nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass zumindest eine Öffnung (12) an der dem gegenüberliegenden Formballen (2) zugewandten Seite trichterförmig erweitert ausgebildet ist. 9. Casting mold according to one of claims 1 to 8, characterized in that at least one opening (12) on the opposite mold bale (2) facing side is formed funnel-shaped.
10. Verfahren zur Herstellung einer kastenlosen, horizontal geteilten Gießform bestehend aus wenigstens zwei aus einer Formmasse gebildeten Formballen (1 , 2), wobei Formmasse in Formkästen und/oder Formrahmen gefüllt wird und die Formkästen mit Befestigungselementen (22) verspannbar sind, dadurch gekennzeichnet, dass an Befestigungselementen (22) positionierte Bolzen (17, 18, 23, 24) bei der Herstellung der Formballen (1 , 2) Öffnungen (3, 4) in die Formballen (1 , 2) einbringen und die Bolzen (17, 18, 23, 24) so platziert sind, dass sie die Öffnungen ( 3, 4) so einbringen, dass für zwei einander gegenüberliegende Formballen (1 , 2) eine vertikale Führungslinie für ein stabartiges Führungselement (5) zur horizontalen Ausrichtung der Formballen (1 , 2) entsteht. rfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Bolzen (17, 18,, 24) auf den Befestigungselennenten (22) aufgeschraubt sind. 10. A method for producing a boxless, horizontally divided mold consisting of at least two molded bales (1, 2), wherein molding material is filled in mold boxes and / or mold frame and the molding boxes with fasteners (22) are clamped, characterized that bolts (17, 18, 23, 24) positioned on fastening elements (22) introduce openings (3, 4) into the mold bales (1, 2) during the production of the molded bales (1, 2) and the bolts (17, 18, 23, 24) are placed in such a way that they introduce the openings (3, 4) in such a way that a vertical guide line for a rod-like guide element (5) for horizontal alignment of the molded bales (1, 2) is produced for two opposing molded bales (1, 2) ) arises. Driving according to claim 10, characterized in that the bolts (17, 18, 24) on the Befestigungselennenten (22) are screwed.
EP10759644.7A 2009-09-30 2010-09-29 Flaskless mould Not-in-force EP2483012B1 (en)

Applications Claiming Priority (2)

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DE102009043555A DE102009043555B4 (en) 2009-09-30 2009-09-30 Castless casting mold
PCT/EP2010/064411 WO2011039220A1 (en) 2009-09-30 2010-09-29 Boxless casting form and method for the production thereof

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EP2483012A1 true EP2483012A1 (en) 2012-08-08
EP2483012B1 EP2483012B1 (en) 2016-07-13

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JP (1) JP5659233B2 (en)
CN (1) CN102686332B (en)
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BR112012006424A2 (en) 2016-04-19
DE102009043555A1 (en) 2011-04-07
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JP2013506557A (en) 2013-02-28
WO2011039220A1 (en) 2011-04-07
JP5659233B2 (en) 2015-01-28
RU2012114484A (en) 2013-11-10
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CN102686332B (en) 2016-05-18
US20120217677A1 (en) 2012-08-30

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