WO2000043150A1 - Agencement de machine imbrique pour remplissage et compactage d'un materiau de moulage - Google Patents

Agencement de machine imbrique pour remplissage et compactage d'un materiau de moulage Download PDF

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Publication number
WO2000043150A1
WO2000043150A1 PCT/EP2000/000523 EP0000523W WO0043150A1 WO 2000043150 A1 WO2000043150 A1 WO 2000043150A1 EP 0000523 W EP0000523 W EP 0000523W WO 0043150 A1 WO0043150 A1 WO 0043150A1
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WO
WIPO (PCT)
Prior art keywords
filling
group
compacting
molding
stations
Prior art date
Application number
PCT/EP2000/000523
Other languages
English (en)
Inventor
Werner Wosnitza
Günter Voss
Frank Iburg
Original Assignee
Künkel-Wagner Prozesstechnologie GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19903376A external-priority patent/DE19903376A1/de
Application filed by Künkel-Wagner Prozesstechnologie GmbH filed Critical Künkel-Wagner Prozesstechnologie GmbH
Publication of WO2000043150A1 publication Critical patent/WO2000043150A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D33/00—Equipment for handling moulds
    • 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
    • B22C11/02—Machines in which the moulds are moved during a cycle of successive operations
    • B22C11/08—Machines in which the moulds are moved during a cycle of successive operations by non-rotary conveying means, e.g. by travelling platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C25/00—Foundry moulding plants

Definitions

  • the invention relates to a for filling and compacting of molding material in molding boxes (generally called flasks or frames) as well as to a method for operating such a machine arrangement.
  • WO 95/31302 shows a machine which permits the filling and molding of sand molds in pairs at an accelerated speed and by using a movement of a single stack of boxes comprising a model, a molding box and a filling frame carried by a carrier plate and being moved together from a (single) filling station to a (single) compacting station, said movement being a linear one.
  • said filling frame is returned into said filling station (above a straight conveying line) and said model is also returned into said filling station (below said straight conveying line), said return movement being effected substantially simultaneously in two separate cycles. Thereby, two rectangular cycles above and below said conveying line are obtained, whereas said conveying line passes between said two vertically oriented cycles. Molding boxes are clocked into said machine arrangement.
  • EP-B1 582 855 BMD
  • EP-B1 697 929 Kuenkel-Wagner
  • Such machines comprise two spaced molding machines, each consisting of a compacting station and a filling station being arranged along a straight conveying line. They have a distance being an odd multiple of the box length, so that a double thrust of molding boxes always results in one machine molding one type of molding boxes and the other machine the other type, said molding boxes being equipped with models for an upper and a lower box in said molding machine.
  • Said molding boxes are alternatively arranged on said conveying line in a linear direction and are moved in said linear direction by a cylinder, providing the thrust length as one transportation step.
  • One object of the invention is an improvement of the conveying performance and the molding performance of granular molding material compacting machines by a new arrangement and a corresponding new method.
  • a further object of the invention is to realize energy savings in said molding material compacting machines.
  • a further object of the invention is to minimize synchronization overhead in control of the groups of machines.
  • the machine arrangement according to the invention comprises two compacting machines, one nested into the other and each comprising a compacting station and a filling station.
  • a pair of machines, having a filling station and a compacting station is arranged close to each other and apart from said closely neighbored machines, a markedly spaced pair of machines, having a filling station and a compacting station, is provided, all of them being arranged along a straight conveying line.
  • This invention may be applied to three, four or a number of machines, so that firstly three filling stations and subsequently three compacting stations or firstly four filling stations and subsequently four compacting stations are arranged in a linear direction of said conveying line.
  • Each molding frame thrust moves the box stacks known from the above cited prior art by a direct thrust from said number of filling stations to or into said number of compacting stations. Thereby, two, three or four box stacks, each of them being filled, are simultaneously moved in linear direction and then are substantially simultaneously compacted in said group of compacting stations.
  • said arrangements of box stacks are separated in axial direction into their individual elements, said separation being effected by axial movements and a lifting table control and a corresponding controlled turning in of roller conveyors, so that after said separation in axial direction, a group of filling frames is positioned above said conveying line and a group of model plates (or pattern plates), particularly with model plate carriers, is positioned below said conveying line, whereby they are lined up as a group in linear direction.
  • a compacting station and a filling station together are a "molding machine” having the functions of filling with molding material and compacting of molding material in a molding box.
  • a group of box stacks is linearly moved by a double thrust (a thrust of double length), if two filling stations are provided, by a triple thrust, if three filling stations are provided, and by a quadruple thrust, if four filling stations are provided.
  • the thrust number corresponds to the number of filling stations or "filling arrangements" at the beginning of the machine arrangement.
  • said box stacks are moved forward over a specified distance, said distance being larger than a sum of distances of said filling stations, particularly as large as a distance between two filling stations plus a distance between a filling station and a first compacting station, or if three filling stations are provided, twice the spacing between two filling stations plus a distance between the innermost filling station and the innermost compacting station.
  • said distance is not measured between an output edge and an input edge of adjacent machines, but from a respective machine center to a neighbored machine center of two adjacent machines, each machine center being defined by a supposed plane extending through said machine and being oriented perpendicular with respect to the transportation direction of the conveying line.
  • all of said center planes extend substantially in parallel with respect to each other, so that individual distances between machines are to be understood as distances between the center planes of said machines.
  • Figure 1 illustrates the starting position, on the basis of which the work flow of the machine shall be described.
  • Figure 2 illustrates the beginning of the filling process and the beginning of the simultaneous compacting process in both sections of the machine arrangement, namely the filling section 20 and the compacting section 30, comprising two filling stations 20a, 20b and two compacting stations 30a, 30b respectively.
  • Figure 3 illustrates the situation after filling and after compacting.
  • Figure 4 illustrates the upper and the lower cycle by moving back the filling frames FR above a conveying line 10 and the models M (also called: pattern) and model carriers MT (also called: pattern bolster) below said conveying line 10 to return to the position according to Figure 1.
  • Figure 5 illustrates an embodiment of a machine arrangement having three compacting stations and three filling stations 20a, 20b, 20c which are nested according to the concept of Figure 1 , so that the first filling station 20c fills a box being compacted by the innermost compacting station 30a provided that a triple thrust of three closely neighbored box stacks is effected from the group of filling stations to the group of compacting stations.
  • Figure 1 illustrates a starting position of the machine arrangement having two filling machines as filling stations 20a, 20b in a filling section 20 of said machine arrangement and two compacting machines as compacting stations 30a, 30b in a compacting section 30 of said machine arrangement.
  • Said filling section 20 is also designated a group of filling machines.
  • Said compacting section 30 is also designated a group of compacting machines.
  • a group of machines defines a number of individual machines arranged close to each other in a conveying direction 10 of a conveying line, marked similarly in all figures and designated here as a molding box roller conveyor 9.
  • the machine arrangement has a first group of machines 20 for filling molding boxes FK moved along the conveying line and a second group of machines 30 for compacting granular molding material F in said molding boxes, which were filled before, and passing said boxes filled with compacted molding sand F further on a continuing portion of said conveying line 9.
  • Figure 1 illustrates the starting position of said first and second machine groups 20,30. After entering two empty molding boxes FK, at the end of said two machine groups two readily molded boxes (boxes containing compacted granular material), designated 41 ,42 in Figure 4, are automatically transported in direction of a reversing arrangement which is not illustrated here.
  • models M lowered down in said compacting group 30 are returned below said conveying line 9 and filling frames FR lifted up in said compacting group are returned above said conveying line 9 from Figure 4 back to Figure 1 into said filling group 30, illustrated there.
  • the return transport is effected by automatically introduced roller conveyors 14,14a above and such conveyors 12,12a below said conveying line 9.
  • Figure 2 illustrates a condition of the machine arrangement according to which the filling process of the molding boxes in the filling group is just beginning, while the compacting of the molding boxes in the compacting group is also just beginning.
  • lifting arrangements illustrated as lifting cylinders 21 a, 21b, firstly take over model carriers MT during lifting, on each carrier a model M resides, subsequently the (still empty) molding boxes FK, which have been pushed in by a double length thrust (or clock) over said roller conveyor 9, and thereafter the filling frames FR waiting above said conveying line 9 on roller conveyors 12a. They are further lifted in vertical direction until reaching a filling position shown in Figure 2 in said filling group 20.
  • second box stacks each comprising a model plate carrier MT, a model M, a molding box FK and a filling frame FR, are lifted until the upper edges of the filling frames FR contact sealing frames in the compacting group.
  • the molding spaces in a group of box stack arrangements, shortly designated with P1 and P2 are closed and sealed by circumferentially arranged sealing portions according to Figure 2.
  • Figure 3 illustrates the end of the filling process started in Figure 2.
  • Closure means in the filling group having been opened and sand quantities dosed in the sand containers, which are positioned above, having been filled into the molding boxes and filling frames FK, FR arranged thereupon.
  • the roller conveyors 12a illustrated in Figure 4 are automatically withdrawn to permit a lowering of the box stack group by lifting cylinders 21 a, 21b, until the level of the conveying line 9 is reached.
  • the precompacting and final compacting of the molding material F occurs substantially simultaneously with the filling in the filling group 20.
  • Figure 4 illustrates the two box stack arrangements P1 and P2 as already mentioned, which are filled with sand and which may be moved to the right on intermediate roller conveyors 11 to reach the compacting group.
  • the compacting process of the group of box stack arrangements being present there is finished and a separating step has already been effected comprising lowering of the model M and lifting of the filling frame FR.
  • Said filling frames FR are illustrated above a conveying line 9 and said models M with model carriers MT below said conveying line 9. Said condition is reached after the compacting process according to Figure 3 is terminated. Thereafter, the lifting cylinders 31 a, 31b with the readily compacted molds are lowered in the compacting group.
  • the group of filling frames FR is placed on laterally introduced roller conveyors 12 which are visible in Figure 1.
  • the remaining box stack arrangements comprising molding box, model and model plate are moved further downward to softly place the molding boxes on intermediate roller conveyors 11 a, 11 b. Thereafter, the molding boxes are separated from the models M at a reduced speed in such a way that during the separation step the molds have time for aeration.
  • the lifting cylinders 31a and 31b continue lowering until their starting position, placing the model plate carriers MT on roller conveyors 14 beforehand. Placing is effected at a reduced speed.
  • the condition as illustrated in Figure 4 is the beginning of the return transport of the models M with model carriers MT, shown by arrows.
  • a group of a box stack arrangements comprising a model carrier MT, a model M, a molding box F and a filling frame FR, which latter being filled with molding sand F, is moved from the filling group 20 into the compacting group 30 simultaneously and without changing its relative distance. Said linear movement is the best visible between Figure 4 and Figure 1 and is indicated by arrows in Figure 4 in a group comprising two molding box stack arrangements P1 and P2.
  • the group of filling frames FR returns above a conveying line 9 and a group of model plates M and model plate carriers MT returns below said conveying line 9 into the filling group.
  • two groups of box stacks circulate simultaneously, one of said box stack arrangements being assembled, whereas the other one being separated, with the exception of the condition according to Figure 2, in which both box stacks are at the same time assembled.
  • the distance of the individual machines results from Figure 1 , showing the respective center planes (marked by a dot-dash line).
  • the two filling machines as two independent machines have a distance c.
  • the two compacting machines as two independent machines have a distance b.
  • a distance a of the center planes of said machines is provided between the innermost filling machine 20a and the innermost compacting machine 30a. The sum of all three distances defines the total distance d between the center plane of the first filling machine 20b and the last compacting machine 30b.
  • all distances a, b and c are equal and correspond substantially to the distance between the centers of rowed up and transported molding boxes in the conveying line 9. This is the reference distance length of the molding box transport, i. e. substantially the linear extension of the molding boxes FK which are clocked along the conveying line, said linear movement being represented by reference numeral 10.
  • the molding box FK as illustrated in Figure 1 is moved forward over a length or a distance c+a, the neighboring molding box FK is moved over the same distance, so that they reach the compacting group in a respective box stack P1 ,P2 according to Figure 4 and are positioned there at the respective machine centers.
  • each group of box stacks P1.P2 and P3 is increased by one box stack and three box stacks are simultaneously conveyed in a linear direction 10 from the filling group 20 into the compacting group 30, substantially simultaneously returning an upper group comprising three filling frames FR and a lower group comprising three models into the filling group 20 on turned in roller conveyors.
  • Figure 5 shows the group principle.
  • a first group of box stacks moves forward, while a group of filling frames is returned above a conveying line 9 and a group of models is moved back below said conveying line.
  • two groups of box stack arrangements circulate in the machine, each group comprising one more box stack than described according to Figure 1.
  • the length of movement of a stack arrangement becomes a triple thrust 2c+a (which is 3c, when a equals c). This triple thrust is longer than 2c, but less than 4c.
  • the machine arrangement as described having two filling arrangements and two compacting arrangements, is more advantageous than the twin machines known from prior art.
  • Different models a model pair comprises a model for the upper box and a model for the lower box
  • twin machines are used e. g. for a core-intensive production, a bottleneck in the core production may be caused, because a corresponding high productivity is required there. Bottlenecks in core production, however, cause a more frequent model change and a loss of time.
  • the simultaneous molding of two different model pairs one in the first group of box stacks and a second one in the second group of box stacks, may avoid bottlenecks in core production.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)

Abstract

L'invention porte sur un agencement de machine imbriqué et sur un procédé de fonctionnement de cet agencement de machine destiné à remplir et comprimer un matériau de moulage dans des boîtes de moulage. Ce système comprend un premier groupe de dispositifs d'empilement de boîtes, chacun comportant une plaque à motifs (M), une boîte de moulage (FK) et un cadre de remplissage (FR) empilés les uns sur les autres. Ce premier groupe se déplace globalement et de manière linéaire dans un sens (10) d'acheminement depuis un groupe d'au moins deux stations de remplissage (20a, 20b) à un groupe d'au moins deux stations de compactage (30a, 30b) après le remplissage du premier groupe de dispositifs d'empilement de boîtes avec le matériau de moulage (F) du groupe des stations de remplissage (20). En outre, selon ce procédé, le système d'acheminement a été amélioré.
PCT/EP2000/000523 1999-01-25 2000-01-24 Agencement de machine imbrique pour remplissage et compactage d'un materiau de moulage WO2000043150A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19902813 1999-01-25
DE19902813.3 1999-01-25
DE19903376A DE19903376A1 (de) 1999-01-25 1999-01-28 Verschachtelte Maschinenanordnung zum Füllen und Verdichten von Formstoff in Formkästen
DE19903376.5 1999-01-28
US40173699A 1999-09-23 1999-09-23
US09/401,736 1999-09-23

Publications (1)

Publication Number Publication Date
WO2000043150A1 true WO2000043150A1 (fr) 2000-07-27

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ID=27218937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/000523 WO2000043150A1 (fr) 1999-01-25 2000-01-24 Agencement de machine imbrique pour remplissage et compactage d'un materiau de moulage

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WO (1) WO2000043150A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582855A1 (fr) * 1992-08-13 1994-02-16 BMD Badische Maschinenfabrik Durlach GmbH Procédé de transport des moules et ligne de moulage pour fonderie fonctionnant selon ce procédé
WO1995031302A1 (fr) * 1994-05-18 1995-11-23 Künkel-Wagner Prozesstechnologie GmbH Remplissage et formage jumeles de moules en sable
EP0697929A1 (fr) * 1993-05-07 1996-02-28 Künkel-Wagner Prozesstechnologie GmbH Convoyeur pour chassis de moulage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582855A1 (fr) * 1992-08-13 1994-02-16 BMD Badische Maschinenfabrik Durlach GmbH Procédé de transport des moules et ligne de moulage pour fonderie fonctionnant selon ce procédé
EP0697929A1 (fr) * 1993-05-07 1996-02-28 Künkel-Wagner Prozesstechnologie GmbH Convoyeur pour chassis de moulage
WO1995031302A1 (fr) * 1994-05-18 1995-11-23 Künkel-Wagner Prozesstechnologie GmbH Remplissage et formage jumeles de moules en sable

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