EP1477251B1 - Method and foundry moulding machine for the manufacture of sand moulds in flasks - Google Patents
Method and foundry moulding machine for the manufacture of sand moulds in flasks Download PDFInfo
- Publication number
- EP1477251B1 EP1477251B1 EP04011229A EP04011229A EP1477251B1 EP 1477251 B1 EP1477251 B1 EP 1477251B1 EP 04011229 A EP04011229 A EP 04011229A EP 04011229 A EP04011229 A EP 04011229A EP 1477251 B1 EP1477251 B1 EP 1477251B1
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- EP
- European Patent Office
- Prior art keywords
- model
- mould
- sand
- filling
- filling frame
- 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.)
- Expired - Lifetime
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- 238000000465 moulding Methods 0.000 title claims description 170
- 238000000034 method Methods 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000003825 pressing Methods 0.000 claims description 14
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- 239000004033 plastic Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
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- 238000006073 displacement reaction Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- 230000006835 compression Effects 0.000 description 98
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- 238000005056 compaction Methods 0.000 description 19
- 230000000284 resting effect Effects 0.000 description 11
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
Definitions
- two filling frames are in circulation, wherein one of the two filling frame is received in the sand filling station on an upper level of the molding box and on a lower mold box transport plane as part of the molding sand filled molding unit (model plate, molding box, filling frame) together with form box transport of the molding line from the sand filling station is transported to the compression station.
- the other filling frame is separated in the compression station after compaction on the upper level of the molding box and transported back on this level at the same time with the mold box transport from the compression station to the sand filling station.
- Particularly disadvantageous here is the extremely large vertical distance between the mold box transport path and the working positions during compaction and sand filling in the molding box.
- Another advantage is that sufficient time for a time-expanded and fine-dosing sand filling into the molding box is available by appropriate division of the work steps.
- a disadvantage is the high apparatusive effort for the Grefenschtransport and for the additional stations for placing and removing the filling frame, resulting in a four-station molding machine with correspondingly disadvantageous length.
- Object of the present invention is, while avoiding the disadvantages described above and while maintaining the previously EP-0995521 described advantages of proposing a method and a molding machine, which with further use of a Sandyogllstation and then the following compression station (two-station molding machine) but without circulating or attributable filling frame a Taktzeitverkürzung and at the same time an extension of Sandein spallzeit in the molding box feasible is, is made possible by the extended Sandein spallzeit a layered and adapted to the model contour molding sand filling in the molding box.
- the object is achieved by the Grefenfunktion is assigned in two steps, on the one hand a telescopically and vertically displaceable filling frame on the model carrier frame and on the other hand a telescopically arranged at the compression station and vertically displaceable filling frame.
- the filling frame " model filling frame " arranged on the model carrier frame and the filling frame arranged at the compacting station are called “compression filling frame " .
- the model filling frame with the model plate lowered therein and with the molding box placed thereon form the filling space for the loose foundry sand which is filled in the sand filling station.
- the compaction fill frame is placed on the molding box and the pattern plate is raised within the model fill frame to the mold box bearing surface, thereby displacing the displaced loose molding sand into the compaction fill frame.
- the compression filling frame now has the usual filling frame function for compression molding.
- the object is achieved by a movable Sandein spallvorraum with a Sandaustrag attached Sandleittrichter, whereby the molding sand in the time available made by a forward and backward travel movement applied in layers on the model or filled into the molding box.
- the Sandleittrichter the lower edge is moved to a small distance from the Formkastenober Structure, has a rectangular réellequeritesl in the horizontal, the transverse to the direction of long side covers the inner area of the molding box and lying in the direction of movement short side corresponds to approximately 1/4 of Formkasteninnen remedieses.
- the compaction lift table is raised, which after passing a free travel through the area of the lower of the model transport device picks up the model carrier frame and pushes it up with the model plate resting on it until the model plate surface is level with the surface of the model filling frame and also even the model filling frame is slightly lifted from its roller conveyor so that it can swing out for demolding.
- a corresponding proportion of the loose poured molding sand has been pushed up into the placed on the molding box Verdichtungs spallrahmen, which now takes over the usual Artrahmenfunktion when compacting.
- This method according to the invention enables a further advantage according to the invention for compacting the molding sand.
- the compression lift takes after passing through the idle stroke with its full lifting speed on the model unit, the model unit and thus the loose poured molding sand is accelerated abruptly, which sets the molding sand and inhomogeneous filling points are reduced.
- the air in the mold chamber is compressed by the pushing up of the molding sand.
- the compressed air can be dissipated via model plate nozzles, resulting in a fluidization of the molding sand leads.
- the molding box is about 6mm over its roller conveyor during compression, so that immediately after the compression, the slow lowering of the compression lifting table can begin, at the same time the compression pressure is reduced and after which 6mm Absenkhub demolding begins.
- the compression filling frame is raised so far that the molding box with the protruding molding sand can extend freely below the compression filling frame.
- the model filling frame remains in the lower position during demolding, i. the surface of the model frame and the surface of the model plate remain at the same level. As described above, the model unit is lowered again in the sand filling station opposite the model filling frame.
- the sand filling station A has a movable molding sand filling device 2.14 with a sanding funnel 2.15 , with which the molding sand can be filled in layers into the forming unit 4.05 . Furthermore, the sand filling station A has a sandbox frame 2.11 which can be deposited on the molding box 4.01 and into which the sanding funnel 2.15 / 2.16 protrudes, thus preventing the molding sand from being splashed out during the layered filling of the molding sand.
- the sand filling station A also has a lifting table 2.01 for lifting the model / filling frame unit 4.04 (model unit 4.02 / model filling frame 4.
- the molding boxes are fixed in the stations A1 and B1 by the centering devices 1.10 , so that the molding boxes located in the stations A and B have a slight play with each other and thus are vertically movable.
- the roller conveyor 1.05 which is likewise fastened to the column racks 1.03 , continues for the return transport 1.09 of the model / filling frame unit 4.04 from the station B to the station A.
- the compressed air pulse method is shown for the compression. However, other compression methods can also be used, which will be discussed in detail elsewhere.
- the elevating platform 2.01 raised in station A lifts the model unit 4.02 with the model filling frame 4.03 still lowered below it under the empty molding box 4.01 retracted into station A and raises it about 6 mm (measure 2.05 mm) . Fig.2 ) from its roller conveyor 1.04 .
- the model roller conveyor 2.03 with about 3mm game is pushed under the runner bar 4.30 of the model filling frame 4.03 , after which the lifting table 2.01 lowers again and places the model filling frame 4.03 onto the inserted model roller conveyor 2.03 ( Fig.2 ).
- the mold box lying on the model filling frame 4.03 then has a distance of approx.
- the sanding funnel 2.15 is divided into segments 2.16 and 2.17 in the lower area. Since manufacturing tolerances can cause overhangs at the segment transitions which lead to the caking of molding sand, the sanding funnel segments 2.16 and 2.17 are widened downwards in order to avoid caking of the molding sand ( Fig.1 and 2 ).
- each side are provided with two receiving strips, the receiving strips drive when lifting the lifting table 2.01 under the rails 4.30 of Modell Strukturllrahmens 4.03 and raise it from the support surface 4.39 so far between the collar of the support pin 4.23 and the plastic disc 4.24 ( Fig. 7 ) a distance of ca.3mmm is reached.
- the surface of the lifting table 2.01 which is raised further, reaches the lower surface of the 4.02 model unit so that the 4.03 model filling frame and the 4.02 model unit are lifted from the lifting table 2.01 to the upper end position.
- the internal dimensions of the sand protection frame 2.11 are 2.10 mm thick to prevent sand deposits on the molding box ( Fig.2 ) slightly smaller than the mold box internal dimension.
- the Sandleittrichter 2.15 / 2.16 which is located at a small distance 2.09 on the molding box, in the horizontal has a rectangular inner cross-section ( Fig.1 . Fig.2 ), wherein the transverse to the direction of movement long side ( Fig.2 ) covers the inner area of the molding box and lying in the direction of movement short side 2.40 about 1/3 to 1/6, preferably 1/4 of Formkasteninnen cakeses, whereby the layered sand filling is enabled.
- the available time is fully utilized as a constant.
- Fig.2 through which the molding sand discharged on the discharge gate is directed into the molding unit.
- the number of Austragschieber 2.26 and the associated shafts 2.18 in Sandleittrichter depends on the to be covered Formkasteninnenlick, but at least three Austragschieber or three shafts are required.
- the molding sand flow monitoring control element 2.28 is attached, wherein a by gravity vertically suspended plate is lifted by the molding sand stream and thereby actuates a sensor 2.29 .
- the individual drive elements 2.27 of Austragschieber 2.26 and the drive cylinder 2.25 of Sandein spallvor substances 2.14 each have a distance measuring system in one, the respective model permanently assigned record is doing each path measuring point of the drive cylinder 2.25 assigned a certain opening position 2.30 of the individual discharge valves 2.26 .
- the distance measurement is infinitely linear in digital or analog form, the distance measuring points of the drive cylinder 2.25 for the assignment of Austragschieber ein are conveniently tapped in small grids, for example, 1mm.
- the opening positions during the flow and the return of the drive cylinder 2.25 and the Sandein spallvoroplasty 2.14 at the respectively associated distance measuring points are the same.
- the model ID number including the top or bottom box identifier is automatically read out, allowing immediate access to the record, so that the new parameters are immediately available and the molding machine is adjustable to delay.
- the nominal values for the individual discharge heights 2.30 and for the conveying speed of the conveyor belt 2.20 stored in the data record are based on a standard molding sand moisture. In case of deviations from this standard Molding sand moisture, these target values are automatically adapted to the particular measured sand moisture content.
- the mold chamber 3.13 in which the compression pressure is brought into action, is sealed by the elastic seals 3.28, 3.29 and 4.33 to the outside atmosphere.
- the seal 3.29 between the compression unit 3.14 and the Verdichtungs colllrahmen 3.22 is clamped with a terminal strip 3.30 on the compression unit and it has an elastic projection 3.31 , which has no contact with the inner wall of the Verdichtungs colllrahmen 3.22 by a small clearance.
- the sealing takes place in which the circumferential flange surface 3.25 of the compression filling frame is pressed onto the elastic sealing projection 3.31 . During the compression of the contact pressure and the closing pressure is increased even further to the seal by the compacting pressure 3:29 in the molding chamber.
- FIG. 9 shows, for example, a combined compaction unit 3.18 for pneumatic air stream pressing and for pneumatic expansion presses wherein the pneumatic expansion presses EP-1155761-A1 is known. Out EP-1155761-A1
- the multi-airpress system is also known, which is also used here.
- Compaction unit 3.18 shown also allows compaction by "model pressing", wherein the molding sand is supported on the extended press dies 3.19 and the model is pressed from below into the molding sand.
- the press ram cylinders 3.20 can be adjusted to the full compression pressure be able to compensate accordingly during compaction of the model contour. But the ram 3.20 can also be set with a lower pressure, so that they are pressed after reaching this pressure of the correspondingly slightly compacted molding sand all up and the final thickening is followed by a correspondingly high pressure from above by lowering the ram.
- the upper machine frame 1.02 is designed to fit the described compaction systems. When using the air flow press, the air flow to be injected from above can already be initiated when the lift table 3.01 detects the model unit 4.02 for pushing up.
- the compressed air is discharged via the model plate nozzles 4.06 and over the edge slot 4.14 , whereby the loose poured molding sand is fluidized.
- the fluidization can optionally be further enhanced in the additional compressed air via the valves 3.36 and via the openings 3.27 ( Fig.1 . 3 ) is blown into the mold chamber 3.13 .
- the pressure to be applied at the pressure valve 3.37 and the amount of compressed air to be injected are adjustable at the valves 3.36 .
- the blowing takes place when pushing up the loose poured sand. It can begin at the earliest when the compression filling frame 3.22 has been placed on the molding box 4.01 .
- the models are provided with model plate nozzles 4.06 according to the requirements, whereby the fluidizing air flow and the displaced compressed air can escape or whereby compressed air can be blown into the forming chamber 3.13 during the expansion pressing from below.
- the base frame on the openings 4.26 , which are congruent with corresponding openings 4.26 in the lifting table 3.01 .
- an intermediate frame 4.09 is used, which is inserted between the model plate 4.11 and the base frame 4.08 and centered about the centering 4.15 the model plate 4.11 to the base frame 4.08 .
- the use of an intermediate frame depends on the model depth .
- the surface of the Modell colllrahmen 4:03 is the support surface for the mold box 4.01, and accordingly, the Modell spallrahmen from the Fig.1 apparent centering 4.21 for the upper box and 4.22 for the lower box with the usual round hole / round pin or flat hole / flat pin design on.
- Figure 8 with the top view of the model unit and model filling frame, the position of the various centering elements and the position of the support bolts is shown.
- the top of the model filling frame 4.03 has a seal 4.33 , whereby the mold chamber 3.13 together with the other Seals 3.28 and 3.29 is sealed to the outside atmosphere.
- the model filling frame has a seal at the bottom 4.34 , whereby the interior of the model unit 4.02 is sealed during expansion pressing to the outside atmosphere.
- the adjustment between the molding box 4.01 and the model 4.10 / 4.11 / 4.12 takes place via the non-moving centering elements 4.15 / 4.16 and further via the moving centering 4.17 / 4.18 / 4.20 and 4.21 / 4.22, whereby the offset between the molding box and model by appropriate selection the fits can be limited.
- a fit selection for 4.15 / 4.16 with H7 / h6 for 4.17 / 4.18 / 4.20 with H7 / g6 and for 4.21 / 4.22 with H7 / e8 an offset of 0.072mm to 0.178mm results.
- model changing device the two driven roller conveyors 5.09 (Axis A) and 5.10 (Axis B) and a run on ground rails rails and provided with a driven roller conveyor shuttle car 5.11
- the model changing roller conveyor 5.09 (axis A) is a UK model / Medrahmenech 4.04 and on the standing in the axis A shuttle car 5.11 is an OK model / Medrahmenech 4.04 ready for replacement.
- Each of the two lifting devices 5.01 and 5.02 is moved vertically by four cylinders 5.03 , wherein the cylinders for guiding through piston rods 5.04 have, so that no further guide rods are required. Since the lifting 5.01 and 5.02 are only moved up and down empty enough only approximate synchronization of the four cylinders 5.03, which is feasible with simple throttle check valves . Calotte fastenings 5.05 between piston rod and lifting device prevent lateral forces on the piston rods. The lifting 5.01 and 5.02 have space reasons, no driven rollers. To drive the Model / Filling Unit 4.04 on the non-driven rollers, the cylinders 5.06 and 5.08 are provided.
- the molding machine can also be used with two model pairs in a constant model circulation operate.
- the process is the same as described before during the model change and there is a model change in virtually every mold cycle.
- This mode of operation is indicated when the models need to be treated before molding, for example by placing chill irons and / or exothermic feeders.
- the models for handling 5.13 are freely accessible for this.
- the residence time for the model treatment is dictated by the molding machine cycle time and is sufficient for normal model treatment.
- the dwell time for the model treatment without cycle time extension can be achieved by molding a model pair without treatment need at least twice in a row, while the other model pair is treated in the meantime and then a one-time molding in the Forming machine is replaced and what this 2: 1 cycle or even 3: 1 cycle is repeated according to the lot size.
- a constant model circulation with three model pairs would also be possible.
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Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß Anspruch 1 und eine Formmaschine gemäß Anspruch 6 zur Herstellung kastengebundener Sandformen unter Verwendung eines aus Oberkasten- und Unterkastenmodell bestehenden Modellplattenpaares, wobei die Ober- und Unterkastenformen nacheinander hergestellt werden und die einzelnen Arbeitsschritte zur Herstellung einer Form in geradlinig hintereinander liegenden und zeitparallel arbeitenden Stationen einer Formmaschine durchgeführt werden.The invention relates to a method according to
Formmaschinen dieser Bauart sind aus den Schriften
Bei
Bei
Bevor die beiden zuvor genannten Formmaschinen gemäß
Aufgabe der vorliegenden Erfindung ist es, unter Vermeidung der zuvor beschriebenen Nachteile und unter Beibehaltung der zuvor zu
Hinsichtlich der Füllrahmenfunktion wird die Aufgabe erfindungsgemäß dadurch gelöst, indem die Füllrahmenfunktion in zwei Schritten, einerseits einem teleskopartig und vertikal verschiebbaren Füllrahmen am Modellträgerrahmen und andererseits einem an der Verdichtungsstation teleskopartig angeordneten und vertikal verschiebbaren Füllrahmen zugeordnet wird. Im Nachfolgenden wird der am Modellträgerrahmen angeordnete Füllrahmen "Modellfüllrahmen" und der an der Verdichtungsstation angeordnete Füllrahmen "Verdichtungsfüllrahmen" genannt. Der Modellfüllrahmen mit der darin abgesenkten Modellplatte und mit dem darauf aufgesetzten Formkasten bilden den Füllraum für den losen Formsand, der in der Sandfüllstation eingefüllt wird. In der Verdichtungsstation wird der Verdichtungsfüllrahmen auf den Formkasten aufgesetzt und die Modellplatte wird innerhalb des Modellfüllrahmens bis zur Formkastenauflagefläche angehoben, wodurch der verdrängte lose Formsand in den Verdichtungsfüllrahmen verschoben wird. Der Verdichtungsfüllrahmen hat jetzt die übliche Füllrahmenfunktion bei der Formverdichtung.With regard to the Füllrahmenfunktion the object is achieved by the Füllrahmenfunktion is assigned in two steps, on the one hand a telescopically and vertically displaceable filling frame on the model carrier frame and on the other hand a telescopically arranged at the compression station and vertically displaceable filling frame. In the following, the filling frame " model filling frame " arranged on the model carrier frame and the filling frame arranged at the compacting station are called "compression filling frame " . The model filling frame with the model plate lowered therein and with the molding box placed thereon form the filling space for the loose foundry sand which is filled in the sand filling station. In the compaction station, the compaction fill frame is placed on the molding box and the pattern plate is raised within the model fill frame to the mold box bearing surface, thereby displacing the displaced loose molding sand into the compaction fill frame. The compression filling frame now has the usual filling frame function for compression molding.
Hinsichtlich der Sandeinfüllung in den Formkasten wird die Aufgabe durch eine verfahrbare Sandeinfüllvorrichtung mit einem am Sandaustrag angebrachten Sandleittrichter gelöst, womit der Formsand in der verfügbar gemachten Zeit durch eine vor- und zurück verlaufende Fahrbewegung schichtweise auf das Modell aufgetragen bzw. in den Formkasten eingefüllt wird. Der Sandleittrichter, dessen Unterkante in einen geringem Abstand zur Formkastenoberfläche bewegt wird, weist in der Horizontalen einen rechteckigen Innenquerschnittl auf, wobei die quer zur Bewegungsrichtung liegende Langseite den Innenbereich des Formkastens überdeckt und die in Bewegungsrichtung liegende Kurzseite ca. 1/4 des Formkasteninnenmaßes entspricht. Der Sandleittrichter wird innerhalb eines auf den Formkasten aufsetzbaren Sandschutzrahmens bewegt, womit ein Herausspritzen des Formsandes verhindert wird. Die modellabhängige Formsandmenge wird von höhenverstellbaren Schiebern bestimmt, die am Auslauf des Formsandbehälters in sektionsweise durch den Sandleittrichter verlaufenden Kanälen angeordnet sind und die auch während des Formsandaustrages zur partiellen Mengenanpassung des Formsandes verstellbar sind. Durch das zeitgedehnte und schichtweise Sandeinfüllen in den Formkasten wird eine allmählich ansteigende und homogene Formsandfüllung in allen Modellpartien, insbesondere der engen und tiefen Modelltaschen ermöglicht, was für eine optimale Formverdichtung von besonderer Bedeutung ist. Eine optimale Formverdichtung wird von der Qualität der Formsandeinfüllung entscheidend mit beeinflusst, so dass also die Sandeinfüllung in den Formkasten und die Formverdichtung gleichrangige Fertigungsabschnitte zur Herstellung einer Form darstellen.With regard to the sand filling in the molding box, the object is achieved by a movable Sandeinfüllvorrichtung with a Sandaustrag attached Sandleittrichter, whereby the molding sand in the time available made by a forward and backward travel movement applied in layers on the model or filled into the molding box. The Sandleittrichter, the lower edge is moved to a small distance from the Formkastenoberfläche, has a rectangular Innenquerschnittl in the horizontal, the transverse to the direction of long side covers the inner area of the molding box and lying in the direction of movement short side corresponds to approximately 1/4 of Formkasteninnenmaßes. The Sandleittrichter is moved within an attachable to the molding box Sandschutzrahmens, whereby a squirting of the molding sand is prevented. The model-dependent amount of molding sand is determined by height-adjustable slides, which are arranged at the outlet of the molding sand container in sections through the Sandleittrichter extending channels and which are adjustable during the molding sand discharge for partial quantity adjustment of the molding sand. Due to the time-expanded and layered sand filling in the mold box gradually increasing and homogeneous molding sand filling in all model lots, especially the narrow and deep model bags is possible, which is for optimal compression of particular importance. An optimal compression of the mold is decisively influenced by the quality of the molding sand filling, so that the sand filling into the molding box and the compression molding represent equally important production sections for the production of a mold.
Der Modellfüllrahmen umschließt teleskopartig die aus dem Modellträgerrahmen und Modellplatte bestehende Modelleinheit und er ist gegenüber der Modelleinheit maßgenau geführt und vertikal verschiebbar. Im abgesenkten Zustand des Modellfüllrahmens ist seine Oberfläche mit Modellplattenoberfläche niveaugleich. Im angehobenen Zustand des Modellfüllrahmens ist seine Oberfläche gegenüber der Modellplattenoberfläche um die erforderliche, aus der Höhe der losen Sandschüttung und einer Leerraumhöhe zwischen Sandschüttung und Formkastenoberfläche resultierende Füllrahmenhöhe erhöht. Die vertikale Verschiebbarkeit des Modellfüllrahmens ist auf diese beiden Niveauzustände mechanisch begrenzt. Die Oberfläche des Modellfüllrahmens ist die Auflagefläche für den Formkasten und entsprechend ist der Modellfüllrahmen mit den üblichen Zentrierelementen versehen. In der Sandfüllstation wird die Modelleinheit mit dem noch unten befindlichen Modellfüllrahmen von einer Hubvorrichtung bis zur Sandeinfüllstellung angehoben, wobei der Modellfüllrahmen den Formkasten aufnimmt und ihn geringfügig von seiner Rollenbahn abhebt. Danach wird eine den Modellfüllrahmen aufnehmende Rollenbahn eingeschwenkt, wonach die Hubvorrichtung wieder absenkt wird. Dabei wird der Modellfüllrahmen auf die eingeschwenkte Rollenbahn abgesetzt während die noch auf der Hubvorrichtung aufliegende Modelleinheit bis zu einer mechanischen, im Außenbereich des Modellfüllrahmens und der Modelleinheit angebrachten Begrenzung weiter absenkt und die Hubvorrichtung danach leer bis in die untere Endstellung fährt. Der Formkasten liegt nun bei einer geringfügigen Distanz zu seiner Rollenbahn auf dem Modellfüllrahmen auf und die Modellplattenoberfläche liegt um das Maß der erforderliche Füllrahmenhöhe unterhalb der Formkastenauflagefläche. Der Formsand wird nun schichtweise und gleichmäßig eingefüllt. Die Sandeinfüllung wird bis zu einem bestimmten Maß unterhalb der Formkastenoberfläche durchgeführt, so dass zwischen der Oberfläche der losen Sandschüttung und der Formkastenoberfläche ein Leerraum verbleibt und somit beim Transport zur Verdichtungsstation kein zur Verschmutzung führender Formsand abgestriffen wird.The model filling frame telescopically surrounds the model unit consisting of the model carrier frame and model plate and it is dimensionally guided relative to the model unit and vertically displaceable. In the lowered state of the model frame, its surface is level with model plate surface. In the raised state of the model filling frame, its surface area is increased relative to the model plate surface by the required fill frame height resulting from the height of the loose sand fill and a void height between the sand fill and the box surface. The vertical displaceability of the model fill frame is mechanical to these two level conditions limited. The surface of the model filling frame is the bearing surface for the molding box and accordingly the model filling frame is provided with the usual centering elements. In the sand filling station, the model unit with the model filling frame still at the bottom is lifted from a lifting device to the sand filling position, whereby the model filling frame picks up the molding box and lifts it slightly off its roller conveyor. Thereafter, a model roller frame receiving roller conveyor is pivoted, after which the lifting device is lowered again. The Modellfüllrahmen is discontinued on the swung-roller conveyor while still resting on the lifting unit model unit further lowered to a mechanical, mounted outside of the model frame and the model unit limitation and then the lifting device runs empty to the lower end position. The mold box is now at a slight distance to its roller conveyor on the model frame and the model plate surface is the measure of the required Füllrahmenhöhe below the Formkastenauflagefläche. The foundry sand is now filled in layers and evenly. The sand filling is carried out to a certain extent below the surface of the molding box, so that a space remains between the surface of the loose sand fill and the surface of the molding box and thus no dirt leading to contamination during transport to the compacting station is stripped.
Mit dem Formkastentransport der Formlinie wird die mit Formsand gefüllte Formeinheit von der Sandfüllstation zur Verdichtungsstation transportiert. Hier wird der vertikal bewegbare Verdichtungsfüllrahmen abgesenkt und auf den Formkasten aufgesetzt. Der Verdichtungsfüllrahmen umgibt teleskopartig das Verdichtungsaggregat und er ist mittels Führungsstangen und Hubzylinder daran angebaut. Gleichzeitig mit dem Absenken des Verdichtungsfüllrahmens wird der Verdichtungshubtisch angehoben, der nach Durchfahren eines Leerhubes durch den Bereich der unteren der Modelltransporteinrichtung den Modellträgerrahmen aufnimmt und diesen mit der auf ihn aufliegenden Modellplatte nach oben schiebt, bis die Modellplattenoberfläche mit Oberfläche des Modellfüllrahmens niveaugleich ist und wobei auch noch der Modellfüllrahmen geringfügig von seiner Rollenbahn abgehoben wird, so dass diese für das Entformen ausschwenken kann. Ein entsprechender Anteil des lose geschütteten Formsandes ist dabei nach oben in den auf den Formkasten aufgesetzten Verdichtungsfüllrahmen geschoben worden, der nun die übliche Füllrahmenfunktion beim Verdichten übernimmt. Es ist so die bekannte Formkammer zusammengefügt worden, die von der Modellplattenoberfläche, von den Innenwänden des Formkastens und des Verdichtungsfüllrahmens sowie von der Unterseite des Verdichtungsaggregates umschlossen ist. An den Kontaktflächen zwischen Verdichtungsfüllrahmen und Verdichtungsaggregat, zwischen Verdichtungsfüllrahmen und Formkasten sowie zwischen Modellfüllrahmen und Formkasten sind Dichtungen angeordnet, um die Formkammer nach außen abzudichten. Zum Verdichten können verschiedene Verdichtungsverfahren wie beispielsweise Luftimpuls, Expansionspressen, Luftstrompressen, Luftimpuls mit Pressen usw. angewendet werden.With the form-box transport of the molding line, the molding sand-filled molding unit is transported from the sand filling station to the compacting station. Here, the vertically movable Verdichtungsfüllrahmen is lowered and placed on the molding box. The compression filling frame telescopically surrounds the compacting unit and it is mounted thereto by means of guide rods and lifting cylinders. Simultaneously with the lowering of the compaction charge frame, the compaction lift table is raised, which after passing a free travel through the area of the lower of the model transport device picks up the model carrier frame and pushes it up with the model plate resting on it until the model plate surface is level with the surface of the model filling frame and also even the model filling frame is slightly lifted from its roller conveyor so that it can swing out for demolding. A corresponding proportion of the loose poured molding sand has been pushed up into the placed on the molding box Verdichtungsfüllrahmen, which now takes over the usual Füllrahmenfunktion when compacting. It has been assembled so the known mold chamber, which is enclosed by the model plate surface, by the inner walls of the molding box and the Verdichtungsfüllrahmens and from the underside of the compression unit. At the contact surfaces between Verdichtungsfüllrahmen and compression unit, between Verdichtungsfüllrahmen and molding box and between the model and the filling frame molding box seals are arranged to seal the mold chamber to the outside. For compacting, various compression methods such as air pulse, expansion presses, air presses, air pulse with presses, etc. can be used.
Dieses erfindungsgemäße Verfahren ermöglicht einen weiteren erfindungsgemäßen Vorteil für das Verdichten des Formsandes. Der Verdichtungshubtisch nimmt nach Durchfahren des Leerhubes mit seiner vollen Hubgeschwindigkeit die Modelleinheit auf, wobei die Modelleinheit und somit der lose geschüttete Formsand schlagartig beschleunigt wird, wodurch sich der Formsand setzt und inhomogene Füllstellen verringert werden. Im weiteren wird die Luft in der Formkammer durch das Hochschieben des Formsandes komprimiert. Die komprimierte Luft kann über Modellplattendüsen abgeführt werden, was zu einer Fluidisierung des Formsandes führt. Sobald der Verdichtungshubtisch ganz angehoben ist, setzt während der noch wirksamen Fluidisierung der Verdichtungsvorgang ein. Die Fluidisierung kann dabei noch zusätzlich verstärkt werden, in dem zeitparallel zum Hochschieben des Formsandes noch Druckluft in die Formkammer eingeblasen wird. Ein besonderer Vorteil ist, dass die Fluidisierung des Formstoffes ohne zusätzlichen Zeitaufwand während des Anhebens der Modelleinheit bzw. während des Hochschiebens des Formsandes erfolgt, so dass also die Taktzeit der Formmaschine durch die Fluidisierung nicht verlängert wird. Beim Stand der Technik ist dies nicht der Fall. Sofern keine oder nur wenige Modellplattendüsen eingesetzt werden, kann die komprimierte Luft kann aber auch als erste Vorstufe der Verdichtung verwendet werden, wonach dann der Hauptverdichtungsvorgang folgt. Im weiteren kann die verdrängte Luft auch über ein Ventil zur freien Atmosphäre abgeführt werden. Diese verschiedenen Anwendungsmöglichkeiten können in Abhängigkeit von den Modellerfordernissen ausgewählt werden. Im weiteren kann dieser erfindungsgemäße Vorteil bei allen zuvor genannten Verdichtungsverfahren angewendet werden.This method according to the invention enables a further advantage according to the invention for compacting the molding sand. The compression lift takes after passing through the idle stroke with its full lifting speed on the model unit, the model unit and thus the loose poured molding sand is accelerated abruptly, which sets the molding sand and inhomogeneous filling points are reduced. In addition, the air in the mold chamber is compressed by the pushing up of the molding sand. The compressed air can be dissipated via model plate nozzles, resulting in a fluidization of the molding sand leads. Once the Verdichtungshubtisch is fully raised, sets during the effective fluidization of the compression process. The fluidization can be further enhanced in the compressed air is injected into the mold chamber time parallel to the pushing of the molding sand. A particular advantage is that the fluidization of the molding material without additional expenditure of time during the lifting of the model unit or during the pushing up of the molding sand, so that the cycle time of the molding machine is not extended by the fluidization. This is not the case in the prior art. If no or only a few model plate nozzles are used, the compressed air can also be used as the first precursor of the compression, after which the main compression process follows. Furthermore, the displaced air can also be discharged via a valve to the free atmosphere. These various applications may be selected depending on the model requirements. Furthermore, this advantage according to the invention can be used in all the aforementioned compression methods.
Der Formkasten liegt beim Verdichten ca. 6mm über seiner Rollenbahn, so dass unmittelbar nach dem Verdichten das langsame Absenken des Verdichtungshubtisches beginnen kann, wobei gleichzeitig der Verdichtungsdruck abgebaut wird und wonach nach 6mm Absenkhub das Entformen beginnt. Der Verdichtungsfüllrahmen wird soweit angehoben, dass der Formkasten mit dem überstehenden Formsand frei unter dem Verdichtungsfüllrahmen ausfahren kann. Der Modellfüllrahmen verbleibt beim Entformen in der unteren Stellung, d.h. die Oberfläche des Modellfüllrahmens und die Oberfläche der Modellplatte bleiben niveaugleich. Die Modelleinheit wird, wie zuvor beschrieben, erst wieder in der Sandfüllstation gegenüber dem Modellfüllrahmen abgesenkt.The molding box is about 6mm over its roller conveyor during compression, so that immediately after the compression, the slow lowering of the compression lifting table can begin, at the same time the compression pressure is reduced and after which 6mm Absenkhub demolding begins. The compression filling frame is raised so far that the molding box with the protruding molding sand can extend freely below the compression filling frame. The model filling frame remains in the lower position during demolding, i. the surface of the model frame and the surface of the model plate remain at the same level. As described above, the model unit is lowered again in the sand filling station opposite the model filling frame.
Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen beschrieben. Hinsichtlich der Bezugszeicheneinteilung wird auf die Bezugszeichenliste verwiesen. Die Figuren zeigen:
- Fig. 1
- einen Längsschnitt durch die Formmaschine mit der Sandeinfüllstation "A" und mit der Verdichtungsstation "B", wobei als Verdichtungsverfahren die Druckluftimpulsverdichtung dargestellt ist.
- Fig. 2
- einen Querschnitt durch die Sandeinfüllstation "A" gemäß Schnittlinie A-A,
Fig.1 - Fig. 3
- einen Querschnitt durch die Verdichtungsstation "B", wobei als Verdichtungsverfahren die Druckluftimpulsverdichtung dargestellt ist. gemäß Schnittlinie B-B,
Fig.1 - Fig. 4
- eine Draufsicht auf den Verdichtungsfüllrahmen
- Fig. 5
- eine Draufsicht auf den Modellplattenumlauf
- Fig. 6
- einen Längsschnitt durch die Modellträgereinheit gemäß Schnittlinie C-C,
Fig.8 - Fig. 7
- einen Längsschnitt durch die Modellträgereinheit gemäß Schnittlinie D-D,
Fig.8 - Fig. 8
- eine Draufsicht auf die Modellträgereinheit
- Fig. 9
- einen Längsschnitt durch die Verdichtungsstation "B", wobei als Verdichtungsverfahren das Expansionspressen und das Luftstrompressen dargestellt ist.
- Fig. 1
- a longitudinal section through the molding machine with the Sandeinfüllstation "A" and with the compression station "B", wherein the compressed air pulse compression is shown as a compression method.
- Fig. 2
- a cross section through the sand filling station "A" according to section line AA,
Fig.1 - Fig. 3
- a cross section through the compression station "B", wherein the compressed air pulse compression is shown as a compression method. according to section line BB,
Fig.1 - Fig. 4
- a plan view of the compression filling frame
- Fig. 5
- a plan view of the model plate circulation
- Fig. 6
- a longitudinal section through the model carrier unit according to section line CC,
Figure 8 - Fig. 7
- a longitudinal section through the model carrier unit according to section line DD,
Figure 8 - Fig. 8
- a plan view of the model carrier unit
- Fig. 9
- a longitudinal section through the compression station "B", which is shown as the compression method, the expansion pressing and air flow pressing.
Die einzelnen Geräte der Stationen A und B sind in einem Maschinengerüst integriert, welches aus dem Kopfrahmen 1.02, dem Grundrahmen 1.01 und den Säulengestellen 1.03 besteht. Durch das Maschinengerüst verläuft die an den Säulengestellen 1.03 befestigte Rollenbahn 1.04 zum Transport der Formkästen 4.01, die jeweils nach den durchgeführten Arbeitszyklen in den Stationen A und B taktweise um eine Formkastenteilung in Pfeilrichtung 1.08 durch die Formmaschine transportiert werden. Die Formkästen liegen dabei über ihre verschleißfesten Stoßbolzen 4.38 aneinander wobei der Modellfüllrahmen 4.03 mit der daran hängenden Modelleinheit 4.02 auf den oberen Modellrollenbahnen 2.03 und 3.03 vom auf den Modellfüllrahmen 4.03 aufliegenden Formkasten mitgeführt wird. Nach dem Formkastentransport werden die Formkästen in den Stationen A1 und B1 durch die Zentriervorrichtungen 1.10 fixiert, so dass die in den Stationen A und B befindlichen Formkästen ein geringfügiges Spiel zueinander haben und somit vertikal bewegbar sind. Durch das Maschinengerüst verläuft im weiteren die ebenfalls an den Säulengestellen 1.03 befestigte Rollenbahn 1.05 zum Rücktransport 1.09 der Modell/Füllrahmen-Einheit 4.04 von der Station B zur Station A. In dem vorliegenden Ausführungsbeispiel ist für das Verdichten das Druckluftimpulsverfahren dargestellt. Es können aber auch andere Verdichtungsverfahren angewendet werden, worauf an anderer Stelle noch ausführlich eingegangen wird.The individual devices of the stations A and B are integrated in a machine frame, which consists of the head frame 1.02, the base frame 1.01 and the column racks 1.03 . Through the machine frame, attached to the column racks 1.03 roller conveyor 1.04 runs to transport the mold boxes 4.01, which are each cyclically transported to the work cycles performed in the stations A and B by a mold box division in the direction of arrow 1.08 through the molding machine. The molding boxes lie here on their wear-resistant push pin 4.38 together with the Modelfüllrahmen 4.03 with the hanging model unit 4.02 on the upper model roller tracks 2.03 and 3.03 is carried by the mold box resting on the model frame 4.03 . After the mold box transport, the molding boxes are fixed in the stations A1 and B1 by the centering devices 1.10 , so that the molding boxes located in the stations A and B have a slight play with each other and thus are vertically movable. Through the machine frame, the roller conveyor 1.05, which is likewise fastened to the column racks 1.03 , continues for the return transport 1.09 of the model / filling frame unit 4.04 from the station B to the station A. In the present exemplary embodiment, the compressed air pulse method is shown for the compression. However, other compression methods can also be used, which will be discussed in detail elsewhere.
In der
Aus der zuvor beschriebenen Ausgangsstellung gemäß
Der in der Station A hochfahrende Hubtisch 2.01 hebt die Modelleinheit 4.02 mit dem darauf noch abgesenkten Modellfüllrahmen 4.03 unter den in die Station A eingefahrenen leeren Formkasten 4.01 und hebt diesen ca. 6mm (Maβ 2.05,
Sobald der Hubtisch 2.01 die Modelleinheit 4.02 mit dem noch darauf abgesenkten Modellfüllrahmen 4.03 unter den Formkasten 4.01 gehoben hat und der Sandschutzrahmen 2.11 auf den Formkasten abgelegt wurde, beginnt das Sandeinfüllen in die Formeinheit 4.05, wofür eine Zeit von ca. 60% der gesamten Taktzeit zur Verfügung steht. Gemäß der Darstellung in
In einer alternativen, zeichnerisch nicht dargestellten Variante kann der Hubtisch 2.01 bei tiefer liegender Anordnung je Seite mit zwei Aufnahmeleisten versehen werden, wobei die Aufnahmeleisten beim Anheben des Hubtisches 2.01 unter die Laufleisten 4.30 des Modellfüllrahmens 4.03 fahren und diesen von der Auflagefläche 4.39 soweit anheben, bis zwischen dem Bund des Tragbolzens 4.23 und der Kunststoffscheibe 4.24 (
Die Formsandeinfüllvorrichtung 2.14 besteht aus einem mit Laufrollen 2.23 und einem Zylinderantrieb 2.25 versehenen Fahrgestell 2.22, welches auf den Laufschienen 2.24 hin und her verfahrbar ist und in dem ein Förderband 2.20, ein Dosiergefäß 2.21 mit mindestens drei Austragschiebern 2.26 und der Sandleittrichter 2.15 mit den Aeratoren 2.19 angeordnet ist. Im weiteren gehört zur Formsandeinfüllvorrichtung noch der Sandschutzrahmen 2.11, der mittels der Kurzhubzylinder 2.12 über eine Kalottenverbindung 2.13 auf den Formkasten ablegbar ist und der ein Herausspritzen von Formsand während der Sandeinfüllung verhindert. Die Innenmaße des Sandschutzrahmens 2.11 sind zur Vermeidung von Sandablagerungen auf den Formkasten um das Maß 2.10 (
Um eine vom Modell abhängige, partiell unterschiedliche Formsandeinfüllung in die Formeinheit zu ermöglichen, weisen die einzelnen Antriebselemente 2.27 der Austragschieber 2.26 und der Antriebszylinder 2.25 der Sandeinfüllvorrichtung 2.14 jeweils ein Wegmeßsystem auf In einem, dem jeweiligen Modell fest zugeordneten Datensatz wird dabei jedem Wegmesspunkt des Antriebszylinders 2.25 eine bestimmte Öffnungsstellung 2.30 der einzelnen Austragschieber 2.26 zugewiesen. Die Wegmessung erfolgt stufenlos linear in digitaler oder analoger Form, wobei die Wegmesspunkte des Antriebszylinders 2.25 für die Zuordnung der Austragschieberstellung praktischerweise in kleinen Rastern von beispielsweise 1mm abgegriffen werden. In der Regel sind die Öffnungsstellungen beim Vorlauf und beim Rücklauf des Antriebszylinders 2.25 bzw. der Sandeinfüllvorrichtung 2.14 an den jeweils zugeordneten Wegmesspunkten gleich. Es ist aber auch möglich, dass die Öffnungsstellungen an den jeweils zugeordneten Wegmesspunkten beim Vorlauf einen anderen Wert als beim Rücklauf erhalten. In einer entsprechenden elektronischen Steuereinrichtung werden die Sollwertvorgaben aus dem jeweiligen Datensatz verarbeitet und als Stellbefehl an die Antriebselemente 2.27 der Austragschieber 2.26 ausgegeben. Für jedes einzelne Modell wird ein Datensatz in der elektronischen Steuereinrichtung hinterlegt, wobei der Datensatz zwecks Optimierung online veränderbar ist. Der Datensatz, der neben den Daten für die Formsandeinfüllung auch andere Daten wie beispielsweise Verdichtungsdaten, Gießdaten usw. enthalten kann, wird der Modell-Identnummer fest zugeordnet. Die Modell-Identnummer, die eine Ober- und Unterkatenkennung aufweist, wird in kodierter Form an der Modelleinheit angebracht. Beim Einwechseln eines Modells in die Formmaschine wird die Modell-Identnummer einschließlich der Ober- oder Unterkastenkennung automatisch ausgelesen, womit ein sofortiger Zugriff auf den Datensatz besteht, so dass die neuen Parameter sofort verfügbar sind und die Formmaschine verzögerungsfrei darauf einstellbar ist. Die im Datensatz abgelegten Sollwerte für die einzelnen Austragshöhen 2.30 und für die Fördergeschwindigkeit des Förderbandes 2.20 basieren auf einer standardmäßigen Formsandfeuchtigkeit. Bei Abweichungen von dieser standardmäßigen Formsandfeuchtigkeit werden diese Sollwerte automatisch an die jeweils gemessene Formsandfeuchtigkeit angepasst.In order to enable a model-dependent, partially different molding sand filling in the mold unit, the individual drive elements 2.27 of Austragschieber 2.26 and the drive cylinder 2.25 of Sandeinfüllvorrichtung 2.14 each have a distance measuring system in one, the respective model permanently assigned record is doing each path measuring point of the drive cylinder 2.25 assigned a certain opening position 2.30 of the individual discharge valves 2.26 . The distance measurement is infinitely linear in digital or analog form, the distance measuring points of the drive cylinder 2.25 for the assignment of Austragschieberstellung are conveniently tapped in small grids, for example, 1mm. In general, the opening positions during the flow and the return of the drive cylinder 2.25 and the Sandeinfüllvorrichtung 2.14 at the respectively associated distance measuring points are the same. But it is also possible that the open positions at the respectively assigned distance measuring points in the flow receive a different value than the return. In a corresponding electronic control device, the setpoint specifications are processed from the respective data set and output as a control command to the drive elements 2.27 of the discharge slide 2.26 . For each individual model, a data record is stored in the electronic control device, wherein the data record can be changed online for the purpose of optimization. The dataset, which may include other data such as compaction data, pour data, etc., in addition to the form sand fill data, is hard-coded to the model ID number. The model ID number, which has a top and bottom ID, is attached to the model unit in coded form. When replacing a model in the molding machine, the model ID number including the top or bottom box identifier is automatically read out, allowing immediate access to the record, so that the new parameters are immediately available and the molding machine is adjustable to delay. The nominal values for the individual discharge heights 2.30 and for the conveying speed of the conveyor belt 2.20 stored in the data record are based on a standard molding sand moisture. In case of deviations from this standard Molding sand moisture, these target values are automatically adapted to the particular measured sand moisture content.
Anstatt der schichtweisen und partiellen Formsandeinfüllung können alternativ aber auch andere Formsandeinfüllverfahren bzw. Formsandeinfüllsysteme in der erfindungsgemäßen Formmaschine eingesetzt werden.Instead of layer-by-layer and partial molding sand filling, however, other molding sand filling methods or molding sand filling systems may alternatively be used in the molding machine according to the invention.
Nach dem Formkastentransport 1.08 und dem Modellrücktransport 1.09 befindet sich ein leerer Formkasten 4.01 in der Station A und eine mit losen Formsand gefüllte Formeinheit 4.05 in der Station B und in den beiden Stationen A und B werden die beiden Hubtische 2.01 und 3.01 angehoben. Mit dem Anheben des Hubtisches 3.01 in der Station B wird auch gleichzeitig der Verdichtungsfüllrahmen 3.22 auf den Formkasten abgesetzt. Dabei wird steuerungsseitig sichergestellt, dass der Verdichtungsfüllrahmen 3.22 auf dem Formkasten zur Auflage kommt, bevor der Hubtisch 3.01 die Modelleinheit 4.02 erfasst und den losen Formsand in den Verdichtungsfüllrahmen 3.22 hochschiebt. Der in der Station B hochfahrende Hubtisch 3.01 nimmt nach Durchfahren des unteren Leerhubes 3.21 mit seiner vollen Hubgeschwindigkeit die Modelleinheit 4.02 auf und schiebt diese innerhalb des Modellfüllrahmens 4.03 mit dem losen Formsand nach oben, wobei der Modellfüllrahmen nach dem Weg 3.07 (
Die Verdichtung erfolgt, sobald die Formkammer 3.13 geschlossen und abgedichtet ist und sobald der Hubtisch 3.01 gegen den einwirkenden Verdichtungsdruck fixiert ist. In
Außer der zuvor beschriebenen Druckluftimpulsverdichtung sind in der Arbeitstation B grundsätzlich alle gängigen Verdichtungsverfahren (wie z.B. normales Pressen, Luftstrompressen, Expansionspressen, Unterdruckpressen, Modelleinpressen von unten usw.) einsetzbar. Die
Für das Verdichten hat die Erfindung noch einen weiteren wesentlichen Vorteil. Der Verdichtungshubtisch 3.01 nimmt nach Durchfahren des unteren Leerhubes 3.21 mit seiner vollen Hubgeschwindigkeit die Modelleinheit 4.02 auf, wobei diese und somit der lose eingefüllte Formsand schlagartig beschleunigt wird, wodurch sich der Formsand setzt und inhomogene Füllstellen verringert werden. Akustisch bewirkt diese schlagartige Aufnahme der Modelleinheit 4.02 durch den Hubtisch 3.01 nur einen dumpfen, nicht störenden Stoß. Im weiteren ist die Formkammer 3.13 beim Anheben der Modelleinheit 4.02 innerhalb des Modellfüllrahmens 4.03 bzw. beim Hochschieben des Formsandes in den Verdichtungsfüllrahmen 3.22 geschlossen und abgedichtet. Durch das Hochschieben des Formsandes wird die Formkammer verkleinert und die darin befindliche Luft bei geschlossenen Ventilen 3.35 und 3.36 komprimiert. Die komprimierte Luft wird über die Modellplattendüsen 4.06 und über den Randschlitz 4.14 abgeführt, wodurch der lose geschüttete Formsand fluidisiert wird. Die Fluidisierung kann dabei wahlweise noch verstärkt werden, in dem zusätzlich Druckluft über die Ventile 3.36 und über die Öffnungen 3.27 (
Die
Die Justierung zwischen dem Formkasten 4.01 und dem Modell 4.10/4.11/4.12 erfolgt über die nicht bewegten Zentrierelemente 4.15/4.16 und im weiteren über die bewegten Zentrierelemente 4.17/4.18/4.20 und 4.21/4.22, wobei der Versatz zwischen Formkasten und Modell durch entsprechende Auswahl der Passungen begrenzbar ist. So ergibt sich beispielsweise bei einer Passungsauswahl für 4.15/4.16 mit H7/h6, für 4.17/4.18/4.20 mit H7/g6 und für 4.21/4.22 mit H7/e8 ein Versatz von 0,072mm bis 0,178mm.The adjustment between the molding box 4.01 and the model 4.10 / 4.11 / 4.12 takes place via the non-moving centering elements 4.15 / 4.16 and further via the moving centering 4.17 / 4.18 / 4.20 and 4.21 / 4.22, whereby the offset between the molding box and model by appropriate selection the fits can be limited. For example, for a fit selection for 4.15 / 4.16 with H7 / h6, for 4.17 / 4.18 / 4.20 with H7 / g6 and for 4.21 / 4.22 with H7 / e8 an offset of 0.072mm to 0.178mm results.
Die
Die Formmaschine kann aber auch mit zwei Modellpaaren im einem ständigen Modellumlauf betrieben werden. Der Ablauf ist dabei der Gleiche wie zuvor beim Modellwechsel beschrieben und es findet praktisch in jedem Formmaschinentakt ein Modellwechsel statt. Diese Betriebart ist angezeigt, wenn die Modelle vor dem Formen behandelt werden müssen, beispielweise durch setzen von Kühleisen und/oder exothermen Speisern. Hierfür sind die Modelle für das Handling 5.13 frei zugänglich. Die Verweilzeit für die Modellbehandlung wird von der Formmaschinentaktzeit vorgegeben und sie reicht für eine normale Modellbehandlung aus. Für Modelle, die eine längere Behandlungszeit in Anspruch nehmen, kann die Verweilzeit für die Modellbehandlung ohne Taktzeitverlängerung dadurch erreicht werden, in dem ein Modellpaar ohne Behandlungsbedarf mindestens zweimal hintereinander abgeformt wird, während das andere Modellpaar zwischenzeitlich behandelt wird und danach zu einem einmaligen Formvorgang in die Formmaschine eingewechselt wird und wonach dieser 2:1-Zyklus oder auch 3:1-Zyklus entsprechend der Losgröße wiederholt wird. Durch Verlängerung der Rollenbahnen 5.09 und 5.10 wäre auch ein ständiger Modellumlauf mit drei Modellpaaren möglich.The molding machine can also be used with two model pairs in a constant model circulation operate. The process is the same as described before during the model change and there is a model change in virtually every mold cycle. This mode of operation is indicated when the models need to be treated before molding, for example by placing chill irons and / or exothermic feeders. The models for handling 5.13 are freely accessible for this. The residence time for the model treatment is dictated by the molding machine cycle time and is sufficient for normal model treatment. For models that require a longer treatment time, the dwell time for the model treatment without cycle time extension can be achieved by molding a model pair without treatment need at least twice in a row, while the other model pair is treated in the meantime and then a one-time molding in the Forming machine is replaced and what this 2: 1 cycle or even 3: 1 cycle is repeated according to the lot size. By extending the roller conveyors 5.09 and 5.10 , a constant model circulation with three model pairs would also be possible.
Die erfindungsgemäße Formmaschine ist eine Hochleistungsformmaschine mit extrem kurzer Taktzeit. Darüber hinaus ist eine weitere Leistungssteigerung mit annähernder Verdoppelung der Leistung dadurch möglich, in dem die Formmaschine als Zwillingsformmaschine mit zwei Formsandfülleinrichtungen in der Station A und zwei Verdichtungsaggregaten in der Station B ausgeführt wird, womit innerhalb der Taktzeit zwei Formen gleichzeitig hergestellt werden. Dabei wird in der Station A ein Modellpaar (OK/UK) mit den Formkästen zusammengefügt und mit Formsand gefüllt und in der Station B gleichzeitig ein anders Modellpaar (OK/UK) verdichtet und entformt. Beim Formkastentransport werden die Formkästen um zwei Formkastenteilungen verschoben, wobei gleichzeitig ein fertiges, aus Oberkasten und Unterkasten bestehendes Formenpaar aus der Station B der Formmaschine herausgefahren wird, eine mit Formsand gefüllte Oberkasten/Unterkasten-Formeinheit von der Station A zur Station B verfahren wird und ein leeres, aus Ober- und Unterkasten bestehendes Formkastenpaar in die Station A eingefahren wird. Sofern die Formfläche des Formkastens, wie im zuvor beschriebenen Ausführungsbeispiel, einen rechteckigen Querschnitt aufweist, erfolgt der Formkastentransport sinnvollerweise quer zur Formkastenlängsachse, um den Transportweg einer doppelten Formkastenteilung zu verkürzen. Die Doppel-Formsandeinfülleinrichtung wird dabei auf dem Kopfrahmen der Formmaschine quer zur Formkastentarnsportrichtung verfahren, so dass das schichtweise Sandeinfüllen wie bei der zuvor beschriebenen Single-Ausführung ebenfalls mit Vorteil über die Formkastenlängsachse erfolgt.The molding machine according to the invention is a high-performance molding machine with an extremely short cycle time. In addition, a further increase in performance is possible with approximately doubling the performance by carrying out the molding machine as a twin molding machine with two molding sand fillers in station A and two compacting units in station B , thus producing two molds simultaneously within the cycle time. In the station A, a model pair (OK / UK) is assembled with the molding boxes and filled with foundry sand and at the same time a different model pair (OK / UK) is compacted and demoulded in the station B. In the form of box transport molding boxes are moved to two form box divisions, at the same time a finished, consisting of upper box and lower box mold pair is moved out of the station B of the molding machine, a filled with molding sand upper box / lower box molding unit is moved from station A to station B and a empty, consisting of upper and lower box molding box pair is retracted to the station A. If the molding surface of the molding box, as in the embodiment described above, has a rectangular cross-section, the mold box transport is expediently transversely to the longitudinal axis of the mold box in order to shorten the transport path of a double mold box division. The Doppel-Formsandeinfülleinrichtung is traversed on the head frame of the molding machine transverse to the Formkastententsportrichtung, so that the layered sand filling as in the previously described single-version also takes place with advantage over the longitudinal axis of the mold box.
- 1.)1.)
- FormmaschinengerüstMolding machines scaffolding
- 1.011:01
- Grundrahmenbase frame
- 1.021:02
- Kopfrahmenhead frame
- 1.031:03
- Säulengestellcolumn frame
- 1.041:04
- FormkastenrollenbahnMolding box roller conveyor
- 1.051:05
- ModellrollenbahnModel roller conveyor
- 1.061:06
- Traverse für Modellrollenbahn 2.03 und 3.03Traverse for model roller conveyor 2.03 and 3.03
- 1.071:07
- Traverse für Zylinder 5.06 und 5.08Traverse for cylinder 5.06 and 5.08
- 1.081:08
- FormkastentransportrichtungMolding box transport direction
- 1.091:09
- Modellrücktransport von B nach AModel return transport from B to A
- 1.101.10
- FormkastenzentrierungFormkastenzentrierung
- 2.)2.)
- Sandfüllstation ASand filling station A
- 2.012:01
- HubtischLift table
- 2.022:02
- Elektromagneteelectromagnets
- 2.032:03
- horizontal verschiebbare Modellrollenbahnhorizontally movable model roller conveyor
- 2.042:04
- Distanz Laufleiste 4.30 zur Modellrollenbahn 2.03 (wenn Hubtisch 2.01 ganz oben ist)Distance running track 4.30 to model roller track 2.03 (if lift table 2.01 is at the top)
- 2.052:05
- Distanz Formkasten zur Formkastenrollenbahn 1.04 (wenn Hubtisch 2.01 ganz oben ist)Distance molding box to molding box roller track 1.04 (if lifting table 2.01 is at the top)
- 2.062:06
- Distanz Formkasten zur FK-Rollenbahn 1.04 (wenn Laufleiste 4.30 auf Rollenbahn 2.03 aufliegt)Distance of the molding box to the FK roller conveyor 1.04 (if the 4.90 running rail rests on roller conveyor 2.03)
- 2.072:07
- Distanz Modellfüllrahmen 4.03 zum Modell 4.10/11/12 (Funktionshöhe Modellfüllrahmen)Distance model filling frame 4.03 to model 4.10 / 11/12 (function height model filling frame)
- 2.082:08
- Distanz lose Formsandoberfläche zur FormkastenoberflächeDistance loose molding sand surface to the box surface
- 2.092:09
- Distanz Sandleittrichter zum FormkastenDistance sanding funnel to the molding box
- 2.102.10
- Innenversatz Sandschutzrahmen / FormkastenInternal offset sand protection frame / molding box
- 2.112.11
- SandschutzrahmenSand protective frame
- 2.11a2.11a
- Reinigungsbürste am Sandschutzrahmen 2.11Cleaning brush on sand protection frame 2.11
- 2.122.12
- Kurzhubzylinder zum SandschutzrahmenShort stroke cylinder for sand protection frame
- 2.132.13
- Kalottenbefestigung Kurzhubzylinder zum SandschutzrahmenKalottenbefestigung Kurzhubzylinder to Sandschutzrahmen
- 2.142.14
- FormsandeinfülleinrichtungFormsandeinfülleinrichtung
- 2.152.15
- SandleittrichterSandleittrichter
- 2.162.16
- unteres Segment zum SandleittrichterLower segment to Sandleittrichter
- 2.172.17
- mittleres Segment zum Sandleittrichtermiddle segment to Sandleittrichter
- 2.182.18
- Schächte im SandleittrichterManholes in Sandleittrichter
- 2.18a2.18a
- Sektionen für den FormsandaustragSections for molding sand discharge
- 2.192.19
- Aeratorenaerators
- 2.202.20
- Förderbandconveyor belt
- 2.212.21
- Dosiergefäßmetering
- 2.222.22
- Fahrgestell für FormsandeinfülleinrichtungChassis for molding sand filling device
- 2.232.23
- Laufrollen zum FahrgestellCastors to the chassis
- 2.242.24
- Laufschienen für FormsandfülleinrichtungRunning rails for molding sand filling device
- 2.252.25
- Antriebszylinder für FormsandeinfülleinrichtungDrive cylinder for molding sand filling device
- 2.262.26
- Austragschieber für FormsandmengeDischarge gate for molding sand
- 2.272.27
- Antrieb für AustragschieberDrive for discharge valve
- 2.282.28
- Kontrollelement für FormsandstromControl element for molding sand flow
- 2.292.29
- Sensor zum KontrollelementSensor to the control element
- 2.3030.2
- Austraghöhe des Formsandes am AustragschieberDischarge height of the molding sand on the discharge gate
- 2.312.31
- Verschlussklappe im SandleittrichterClosure flap in the sand funnel
- 2.322:32
- Gummilippe an der VerschlussklappeRubber lip on the flap
- 2.332:33
- Antriebswelle für die VerschlussklappenDrive shaft for the flaps
- 2.342:34
- Zylinder für Antriebswelle / VerschlussklappeCylinder for drive shaft / shutter
- 2.352:35
- Ausgangsposition für schichtweises SandeinfüllenStarting position for layered sand filling
- 2.362:36
- Umkehrposition für schichtweises SandeinfüllenReversing position for layered sand filling
- 2.372:37
- Vorratsbunkerstorage bunker
- 2.382:38
- Teileinfüllung des Formsandes (z.B. eine Schicht)Partial filling of the molding sand (for example a layer)
- 2.392:39
- Füllraum Modellfüllrahmen/Formkasten für den losen FormsandFilling room Model filling frame / molding box for the loose molding sand
- 2.402:40
- Austragbreite des Sandleittrichters 2.15Discharge width of the sanding funnel 2.15
- 3.)3.)
- Verdichtungsstation BCompaction station B
- 3.013:01
- HubtischLift table
- 3.023:02
- Hubzylinder zum Hubtisch 3.01Lifting cylinder to lift table 3.01
- 3.033:03
- horizontal verschiebbare Rollenbahnhorizontally movable roller conveyor
- 3.043:04
- Distanz Laufleiste 4.30 zur Modellrollenbahn 3.03 (wenn Hubtisch 3.01 ganz oben ist)Distance running track 4.30 to model roller track 3.03 (if lift table 3.01 is at the top)
- 3.053:05
- Distanz Formkasten zur Formkastenrollenbahn 1.04 (wenn Hubtisch 3.01 ganz oben ist)Distance form box to form box roller track 1.04 (if lift table 3.01 is at the top)
- 3.063:06
- Distanz Formkasten zur FK-Rollenbahn 1.04 (wenn Laufleiste 4.30 auf Rollenbahn 3.03 aufliegt)Distance of the molding box to the FK roller conveyor 1.04 (when the 4.30 running rail rests on roller conveyor 3.03)
- 3.073:07
- Distanz Modellfüllrahmen 4.03 zum Modell 4.10 / 4.12 (Funktionshöhe Modellfüllrahmen)Distance Modelfillframe 4.03 to model 4.10 / 4.12 (function height Modelfillframe)
- 3.083:08
- Distanz lose Formsandoberfläche zur Unterkante Schottwand 3.17 (wenn 3.01 ganz oben ist)Distance loose molding sand surface to the lower edge bulkhead 3.17 (if 3.01 is at the top)
- 3.093:09
- Distanz Verdichtungsfüllrahmen 3.22 zum Formkasten beim FormkastentransportDistance compression filling frame 3.22 to mold box in case box transportation
- 3.103.10
- Innenversatz Verdichtungsfüllrahmen / FormkastenInternal offset Compression filling frame / molding box
- 3.113.11
- Aussenkmaß (Modell aus der Form)Outside dimension (model from the form)
- 3.123.12
- Abdrückvorrichtung für ModellfüllrahmenPush-off device for model filling frame
- 3.133.13
- Formkammerforming chamber
- 3.143.14
- Verdichtungsaggregat für DruckluftimpulsCompression unit for compressed air pulse
- 3.153.15
- Druckluftspeicher für DruckluftimpulsCompressed air reservoir for compressed air pulse
- 3.163.16
- Impulsdüsenpulse jet
- 3.173.17
- Schottwände unter dem Verdichtungsaggregat 3.14Bulkheads below the compactor 3.14
- 3.183.18
- Verdichtungsaggregat für Luftstrompressen und ExpansionspressenCompression unit for air stream presses and expansion presses
- 3.193.19
- Pressstempel zu 3.18Press stamp for 3.18
- 3.203.20
- Presszylinder zu 3.19Press cylinder to 3.19
- 3.213.21
- Leerhub des Hubtisches 3.01 bis zur Aufnahme der Modelleinheit 4.02Empty stroke of the lifting table 3.01 until the model unit 4.02 is taken up
- 3.223.22
- VerdichtungsfüllrahmenVerdichtungsfüllrahmen
- 3.233.23
- Führungsstangen zum VerdichtungsfüllrahmenGuide rods to the compression filling frame
- 3.243.24
- Zylinder zum VerdichtungsfüllrahmenCylinder to the compression filling frame
- 3.253.25
- umlaufende Bordfläche am Verdichtungsfüllrahmencircumferential flange on the compression filling frame
- 3.263.26
- umlaufender Spalt zwischen Verdichtungsfüllrahmen und Verdichtungsaggregatcircumferential gap between the compression frame and the compression unit
- 3.273.27
- Öffnungen im Verdichtungsfüllrahmen (zum Einblasen von Druckluft in die Formkammer)Openings in the compression filling frame (for blowing compressed air into the molding chamber)
- 3.283.28
- Dichtung Verdichtungsfüllrahmen/FormkastenSeal compression filling frame / molding box
- 3.293.29
- Dichtung Verdichtungsfüllrahmen / VerdichtungsaggregatSeal Compression Filling Frame / Compression Unit
- 3.303.30
- Klemmleiste für Dichtung 3.29Terminal strip for seal 3.29
- 3.313.31
- elastischer Überstand der Dichtung 3.29elastic overhang of the seal 3.29
- 3.323:32
- alternative Dichtung Verdichtungsfüllrahmen / VerdichtungsaggregatAlternative Seal Compression Filler Frame / Compression Unit
- 3.333:33
- Profilnute für Dichtung 3.32Profile groove for seal 3.32
- 3.343:34
- Wulst in der Profilnute 3.33Bead in profile groove 3.33
- 3.353:35
- Entlüftungsventile für die FormkammerBleed valves for the molding chamber
- 3.363:36
- Einblasventile für die FormkammerInjection valves for the molding chamber
- 3.373:37
- Druckventil für EinblasdruckPressure valve for injection pressure
- 4.)4.)
- Modelleinheit und FormkastenModel unit and molding box
- 4.014:01
- Formkastenmolding box
- 4.024:02
- Modelleinheitmodel unit
- 4.034:03
- ModellfüllrahmenModellfüllrahmen
- 4.044:04
- Modell/FüllrahmeneinheitModel / Füllrahmeneinheit
- 4.054:05
- Formeinheitmolding unit
- 4.064:06
- ModellplattendüsenModel plate nozzle
- 4.074:07
- Distanz Modellfüllrahmen 4.03 zum Modell 4.10 /4.12 (Funktionshöhe Modellfüllrahmen)Distance Model Filling Frame 4.03 to Model 4.10 / 4.12 (Function Height Model Filling Frame)
- 4.084:08
- Grundrahmenbase frame
- 4.094:09
- Zwischenrahmenintermediate frame
- 4.104.10
- positives Modellpositive model
- 4.114.11
- Modellplatte für positives ModellModel plate for positive model
- 4.124.12
- negatives Modellnegative model
- 4.134.13
- Passleiste Modell / ModellfüllrahmenPassport molding model / Modelfüllrahmen
- 4.144.14
- Randschlitz zwischen Passleiste und Innenwand des ModellfüllrahmensEdge slot between the sill and inner wall of the model frame
- 4.154.15
- Zentrierelemente Zwischenrahmen / Grundrahmen / ModellplatteCentering elements intermediate frame / base frame / model plate
- 4.164.16
- Zentrierelemente negatives Modell / GrundrahmenCentering elements negative model / base frame
- 4.174.17
- Zentrier- und Führungsstift Grundrahmen / ModellfüllrahmenCentering and guide pin base frame / model frame
- 4.184.18
- Feinführungsbereich zu 4.17Fine guidance area for 4.17
- 4.194.19
- Leichtführungsbereich zu 4.17Lightweight guide to 4.17
- 4.204.20
- Zentrier- und Führungsbüchse Grundrahmen / ModellfüllrahmenCentering and guiding bushing Basic frame / model filling frame
- 4.214.21
- Zentrierbüchsen Formkasten/Modellfüllrahmen (Oberkasten)Centering Boxes Form Box / Model Filling Frame ( Upper Box)
- 4.224.22
- Zentrierstifte Formkasten / Modellfüllrahmen (Unterkasten) Centering pins molding box / model filling frame (lower box)
- 4.234.23
- Tragbolzensupport bolts
- 4.244.24
- Kunststoffscheibe für FangbolzenauflagePlastic washer for catch bolt support
- 4.254.25
- GrundrahmenhöheBase frame height
- 4.264.26
- Öffnungen im Grundrahmen für LuftdurchgangOpenings in the base frame for air passage
- 4.26a4.26a
- Öffnungen im Hubtisch 3.01, deckungsgleich zu 4.26Openings in lift table 3.01, congruent with 4.26
- 4.274.27
- abgekapselter Raum für Führungsstifte 4.17Encapsulated space for guide pins 4.17
- 4.284.28
- abgekapselter Raum für Fangbolzen 4.23encapsulated space for catch bolts 4.23
- 4.294.29
- Querflansch am ModellfüllrahmenTransverse flange on the model frame
- 4.29a4.29a
- Breite des Querflansches 4.29Width of the transverse flange 4.29
- 4.304.30
- Längsflansch und Laufleiste am ModellfüllrahmenLongitudinal flange and running bar on the model filling frame
- 4.30a4.30a
- Breite des Längsflansches 4.30Width of the longitudinal flange 4.30
- 4.314.31
- Sandschutzdach am ModellfüllrahmenSand protection roof on the model filling frame
- 4.324:32
- Druckplatten zur Abdrückvorrichtung 3.12Pressure plates for ejector 3.12
- 4.334:33
- Dichtung Modellfüllrahmen / FormkastenSeal model filling frame / molding box
- 4.344:34
- Dichtung Modellfüllrahmen /GrundrahmenSeal model filling frame / base frame
- 4.354:35
- Reinigungsbürsten für die Hubtische 2.01 und 3.01Cleaning brushes for lifting tables 2.01 and 3.01
- 4.364:36
- Zentrierstifte Grundrahmen / Hubtische 2.01 und 3.01Centering pins Base frame / Lifting tables 2.01 and 3.01
- 4.374:37
- Versatz Oberfläche Modellfüllrahmen zur ModelloberflächeOffset surface of the model filling frame to the model surface
- 4.384:38
- Formkasten-StoßbolzenFlask shock bolt
- 4.394:39
- Auflagefläche des Modellfüllrahmens 4.02 auf den Grundrahmen 4.08Support surface of the model filling frame 4.02 on the base frame 4.08
- 4.404:40
- Innenversatz Modellfüllrahmen / FormkastenInternal offset model filling frame / molding box
- 4.414:41
- Hohlraumausfüllung in Modelleinheit 4.02Cavity filling in model unit 4.02
- 5.)5.)
- ModellwechselvorrichtungModel change device
- 5.015:01
- Hubvorrichtung in Station ALifting device in station A
- 5.025:02
- Hubvorrichtung in Station BLifting device in station B
- 5.035:03
- Zylinder für die Hubvorrichtungen 5.01 und 5.02Cylinder for lifting devices 5.01 and 5.02
- 5.045:04
- durchgehende Kolbenstangen zu 5.03continuous piston rods to 5.03
- 5.055:05
- Kalottenbefestigung Kolbenstange / HubvorrichtungCup fixing piston rod / lifting device
- 5.065:06
- Einzugzylinder in Station AFeed cylinder in station A
- 5.075:07
- Elektromagnet am EinzugzylinderElectromagnet on the intake cylinder
- 5.085:08
- Abschubzylinder in Station BLifting cylinder in station B
- 5.095:09
- angetriebene Rollenbahn in Achse Adriven roller conveyor in axis A
- 5.105.10
- angetriebene Rollenbahn in Achse Bdriven roller conveyor in axis B
- 5.115.11
- Shuttlewagenshuttle cars
- 5.125.12
- Parkbahnparking orbit
- 5.135.13
- Handling BedienungspersonalHandling operating personnel
Claims (26)
- A method for the production of sand moulds in mould boxes (4.01) inside a moulding machine with mobile filling frames which are able to be placed on the mould boxes, and with an upper and lower box model unit (4.02), in which the upper box moulds (OK) and the lower box moulds (UK) are respectively produced in succession,
with a first workstation (A) which has a lifting device (2.01) for joining together the mould unit consisting of model unit (4.02), mould box (4.01) and filling frame, and an arrangement for the filling, extended over time, of the mould sand into the mould unit,
with a second workstation (B) which has a compacting unit (3.14, 3.18) to compact the mould sand and a lifting device (3.01) to press the mould unit against the compacting unit and to separate the model from the compacted mould,
in which the operating steps of the two workstations (A) and (B) run chronologically in parallel,
with a mould box transportation device (1.04, 1.08), in which the two workstations are arranged lying one behind the other,
with a filling frame return arrangement from the second to the first workstation,
with two roller conveyor sections (2.03, 3.03) arranged so as to be able to be swung out beneath the mould box transportation device (1.04), on which the model unit (4.02) is entrained by the mould box (4.01) lying on it during the mould box transportation (1.08) from the first to the second workstation,
with a roller conveyor (1.05) arranged beneath the mould box transportation device (1.04) and beneath the two roller conveyor sections (2.03, 3.03) which are able to be swung out, for the return (1.09) of the model units (4.02) from the second to the first workstation
and with ventilation or aeration nozzles (4.06) arranged in the models,
characterized in that
the filling frame function on the one hand takes place by a compacting filling frame (3.22) which is arranged in a stationary and telescope-like manner on the compacting unit (3.14, 3.18) and is able to be placed by vertical displacement onto the mould box (4.01), and on the other hand by a model filling frame (4.03) which is arranged in a telescope-like manner on each upper and lower box model unit (4.02) and is vertically displaceable,
in the workstation (A), the model filling frame (4.03) is joined together with the mould box (4.01) by means of the lifting device (2.01), and the model unit (4.02) inside the model filling frame (4.03) is moved vertically downwards by means of the lifting device (2.01) by the distance (2.07, 3.07, 4.07), in which together with the mould box (4.01), the mould unit (4.05) is formed with the filling frame (2.39) for the loose mould sand,
in the workstation (A), the filling frame (2.39) is filled with mould sand, extended over time and in layers, by means of a movable mould sand filling device (2.14),
in the workstation (B), the compacting filling frame (3.22) is placed onto the mould box (4.01) of the mould unit (4.05) which is filled with loose mould sand, and the model unit (4.02) is moved upwards by means of the lifting device (3.01) inside the model filling frame (4.03) by the distance (2.07, 3.07, 4.07), in which the displaced loose mould sand is moved into the compacting filling frame (3.22) and the compacting filling frame then undertakes the filling frame function in the subsequent compacting,
after the compacting, and with the model roller conveyor (3.03) opened, the lifting table (3.01) is lowered, and after passing through the distance (3.05) with the placement of the mould box (4.01) onto the mould box roller conveyor (1.04), the demoulding begins and additionally the lowering of the model/filling frame unit (4.04), which is pushed together, takes place onto the model roller conveyor (1.05)
and the compacting filling frame (3.22), at the same time as the lowering of the model/filling frame unit (4.04), is lifted by a distance (3.09) from the mould box (4.01) - The method according to Claim 1,
characterized in that
the mould sand filling device (2.14), which consists of a conveyor belt (2.20), an apportioning vessel (2.21) with at least three discharge sliders (2.26, 2.27), a sand delivery hopper (2.15) with at least three chutes (2.18, 2.18a) and at least one aerator axis (2.19), is moved to and fro by means of drive cylinder (2.25) between the end positions (2.35) and (2.36), in which the mould sand, when the conveyor belt (2.20) is running, is filled in one or more layers into the filling chamber (2.39) via the narrow discharge width (2.40) of the sand delivery hopper (2.15) and by the travelling motion,
for the mould sand filling in layers and extended over time, a time interval is available from the joining together of the model filling frame (4.03) with the mould box (4.01) up to the start of the mould box transportation (1.08), which corresponds to at least 60% of the entire moulding machine cycle time
and the available time interval is used as a constant and the quantity of mould sand, dependent on the model, with a constant sand filling time is determined by the speed of the conveyor belt (2.20) and by adjustable discharge levels (2.30), in which the discharge levels (2.30) are adjusted by means of the discharge sliders (2.26, 2.27). - The method according to Claim 2,
characterized in that
the model-dependent quantity of mould sand during the travelling motion of the mould sand filling device (2.14) is partially adapted to the contours of the model by adjusting the discharge levels (2.30) by means of discharge sliders (2.26, 2.27),
the partial adaptation to the contours of the model takes place over at least three sections (2.18a), in which each section has associated with it an adjustable discharge slider (2.26, 2.27) for adjusting the discharge level (2.30) and a corresponding chute (2.18) in the sand delivery hopper (2.15), in which the chutes (2.18), reaching up to the apportioning vessel (2.21) prevent a mixing of the individual streams of mould sand which are adjusted for the partial adaptation,
the drive cylinder (2.25) for the travelling motion of the mould sand filling device (2.14) and the drives (2.27) for the discharge sliders (2.26) for adjusting the discharge level (2.30) are respectively controlled by means of path measuring systems integrated in the drives (2.25, 2.27), in which to determine the partial mould sand quantity, each model is allocated a set of data, in which the data for the discharge levels (2.30) or for the setting of the discharge sliders (2.26, 2.27) are deposited as a function of the path position of the drive cylinder (2.25) and are recalled to control the discharge sliders (2.26, 2.27) during the travelling motion
and the mould sand is directed, for aeration, via at least one aerator (2.19) arranged in the sand delivery hopper (2.15). - The method according to Claim 1,
characterized in that
the lifting table (3.01), arranged in the workstation (B), receives the model unit (4.02) with its full lifting speed after the idle stroke (3.21) and thereby accelerates the model unit (4.02) and hence the loosely distributed mould sand in sudden bursts, whereby the mould sand settles and non-homogeneous filling sites are reduced,
the loose mould sand which is moved by means of the lifting device (3.01) and model unit (4.02) in the compacting filling frame (3.22) compresses the air in the mould chamber (3.13) and the compressed air produces a fluidising air stream in the loose mould sand, flowing off via the model plate nozzles (4.06), via the marginal slit (4.14) and subsequently via the openings (4.26, 4.26a), which the mould compacting follows without interruption
and the fluidising air stream is able to be additionally reinforced, in which chronologically parallel to the movement of the mould sand into the compacting filling frame (3.22), in addition compressed air is blown in via the valves (3.36, 3.37) and via the openings (3.27) into the mould chamber (3.13). - The method according to any of Claims 1 to 4,
characterized in that
in the workstation (B) all the current compacting methods (such as, for example, compressed air impulse compacting, normal pressing, air current pressing, expansion pressing, vacuum pressing, model pressing-in from below etc.) are able to be used in connection with the compacting filling frame (3.22) and the model filling frame (4.03) belonging to the model/filling frame unit (4.04) and in connection with the filling of the mould sand filling device (2.14) with mould sand in layers. - A device to carry out the method according to any of Claims 1 to 5 for the production of sand moulds in mould boxes (4.01) inside a moulding machine with mobile filling frames able to be placed on the mould boxes and with an upper and lower box model unit (4.02), in which the upper box moulds (OK) and the lower box moulds (UK) are respectively produced in succession,
with a first workstation (A) which has a lifting device (2.01) for joining together the mould unit consisting of model unit (4.02), mould box (4.01) and filling frame, and a mould sand filling device for filling the mould sand, extended over time, into the mould unit,
with a second workstation (B) which has a compacting unit (3.14, 3.18) for compacting the mould sand and a lifting device (3.01) for pressing the mould unit against the compacting unit and for separating the model from the compacted mould,
in which the operating steps of the two workstations (A) and (B) run parallel chronologically,
with a mould box transportation device (1.04, 1.08) in which the two workstations are arranged lying one behind the other,
with a filling frame return arrangement from the second to the first workstation,
with two roller conveyor sections (2.03, 3.03) arranged so as to be able to be swung out beneath the mould box transportation device (1.04), on which the model unit (4.02) is entrained from the mould box (4.01) lying on it during the mould box transportation (1.08) from the first to the second workstation,
with a roller conveyor (1.05) arranged beneath the mould box transportation device (1.04) and beneath the two roller conveyor sections (2.03, 3.03) which are able to be swung out, for the return (1.09) of the model units (4.02) from the second to the first workstation,
with a model changing device for exchanging the model units without extending the cycle time
and with ventilation or aeration nozzles (4.06) arranged in the models,
characterized in that
on the one hand the workstation (B) has a compacting filling frame (3.22) arranged in a stationary manner against the compacting unit (3.14, 3.18) and surrounding the compacting unit in a telescope-like manner and being vertically displaceable by the distance (3.09), which, to receive the loose mould sand and to form the mould chamber (3.13) is able to be placed by means of a lifting device (3.23, 3.24) onto the mould box (4.01) for the compacting process and which, after the compacting process, is able to be lifted from the mould box again by the distance (3.09),
on the other hand, each upper and lower box model unit (4.02), which respectively consists of a model (4.10, 4.11, 4.12) and a base frame (4.08, 4.09), has a model filling frame (4.03) surrounding the model unit (4.02) in a telescope-like manner and being vertically displaceable with respect to the model unit by a distance (2.07, 3.07, 4.07), on the surface of which the mould box (4.01) is able to be placed and centred,
in the workstation (A) the model filling frame (4.03) is able to be joined together with the mould box (4.01) by means of lifting device (2.01) and is able to be displaced by means of lifting device (2.01) with respect to the model unit (4.02) by a distance (2.07, 3.07, 4.07), in which the mould unit (4.05) is formed with the filling chamber (2.39) for the loose mould sand,
the workstation (A) has a movable mould sand filling device (2.14), by which the mould sand is able to be filled, extended over time and in layers, into the filling chamber (2.39),
in the workstation (B) the model unit (4.02) of the mould unit (4.05) filled with loose mould sand is able to be lifted by means of lifting device (3.01) inside the model filling frame (4.03) by the distance (2.07, 3.07, 4.07), and in so doing the displaced loose mould sand is able to be moved into the compacting filling frame (3.22) placed onto the mould box (4.01) and after a further lifting by a distance (3.04, 3.05) the compacting takes place and the roller conveyor (3.03) is opened,
the distance (2.07, 3.07, 4.07) has a mechanical limit on the one hand by the bearing surface (4.39) and on the other hand by the supporting bolts (4.23, 4.24),
the model filling frame (4.03) has the centering elements (4.21, 4.22) for centering the mould boxes (4.01) lying on it, and a running strip (4.30) for transportation on the roller conveyors (2.03, 3.03)
and the base frame (4.08) has the centering- and guiding pins (4.17) and the model filling frame (4.03) has the centering- and guiding bushes (4.20), by which the model filling frame (4.03) is precisely guided and centered to the base frame (4.08). - The device according to Claim 6,
characterized in that
in the workstation (A) with the roller conveyor (2.03) opened, the model unit (4.02) with the model filling frame(4.03) lying on its bearing surface (4.39) is able to be lifted by means of lifting device (2.01), in which the mould box (4.01) is received by the model filling frame (4.03) and is lifted by a distance (2.05) from its roller conveyor (1.04), and after which the roller conveyor (2.03) is able to be moved in with a distance (2.04) under the running strip (4.30) of the model filling frame,
after the moving in of the roller conveyor (2.03), the model unit (4.02) is able to be lowered again by means of the lifting device (2.01), in which the model filling frame (4.03) rests with its running strip (4.30) on the closed roller conveyor (2.03) and the mould box (4.01) then has a distance (2.06, 3.06) to its roller conveyor (1.04) and after which the model unit (4.02) drops further up to a distance (2.07, 3.07, 4.07) or up to the mechanical limit (4.23, 4.24) and subsequently the empty lifting device (2.01) falls further into its lower end position
and the lifting device (2.01) has the electromagnets (2.02) which are able to be connected and disconnected, whereby during the lowering of the model unit (4.02) inside the model filling frame (4.03) an adhesion force is able to be produced between the lifting device (2.01) and the model unit (4.02), which brings about a force assisting the inherent weight of the model unit (4.02) for the reliable lowering of the model unit (4.02) inside the model filling frame (4.03). - The device according to Claims 6 and 7,
characterized in that
the lifting device (2.01), with a lower-lying arrangement, has two receiving strips which, on raising of the lifting device (2.01) are able to be moved underneath the running strips (4.30) of the model filling frame (4.03), with which the model filling frame is initially able to be lifted without the model unit (4.2),
the model unit (4.02), after reaching the distance (2.07, 3.07, 4.07) from the model filling frame (4.03) is taken up and carried along by means of the supporting bolts (4.23), in which the model filling frame (4.03) and mould box (4.01) are able to be lifted up to a distance (2.04, 2.05)
and after the closing of the roller conveyor (2.03), the model filling frame (4.03) with its running strip (4.30) is able to be deposited onto the roller conveyor (2.03) by lowering of the lifting device (2.01), after which the mould box (4.01) has a distance (2.06) to its roller conveyor (1.04) and the lifting device (2.01) which is now empty is able to be lowered to the lower end position. - The device according to Claim 6,
characterized in that
in the workstation (B), the model filling frame unit (4.04), after the compacting process with the roller conveyor (3.03) opened, is able to be lowered by means of the lifting device (3.01), in which the mould box (4.01) after a short distance (3.05) is able to be placed onto its roller conveyor (1.04) and the slow demoulding is able to be carried out with subsequent rapid lowering of the model filling frame unit (4.04) up to the lower model roller conveyor (1.05),
and the workstation (B), on each side of the mould box transportation device (1.04) has at least one release mechanism (3.12)which, on demoulding, is able to be pressed onto a cross-piece (4.32) of the model filling frame (4.03), whereby in a force fit and in synchronism with the lowering movement of the lifting device (3.01), a force assisting the inherent weight of the model filling frame (4.03) is able to be produced for the reliable separation of the model filling frame (4.03) from the mould box (4.01). - The device according to Claims 6 to 9,
characterized in that
the dimension of each individual distance (2.04, 2.05, 2.06, 3.04, 3.06) is at least 1mm and a maximum of 10mm, and the dimension of the distance (3.05) is at least 1mm and a maximum of 15mm. - The device according to Claim 10,
characterized in that
the dimension of each individual distance (2.04, 2.06, 3.04, 3.06) is preferably 3mm and the dimension of each individual distance (2.05, 3.05) is preferably 6mm. - The device according to Claim 6,
characterized in that
the loose mould sand which is moved into the compacting filling frame (3.22) compresses the air in the mould chamber (3.13) with the closed valves (3.35, 3.36), whereby a fluidising air stream is able to be produced through the loose mould sand, which flows off via the model plate nozzles (4.06) and via the marginal slit (4.14) and via the openings (4.26, 4.26a) to the free atmosphere,
the compacting filling frame (3.22) has openings (3.27) and valves (3.36, 3.37), via which the fluidising stream is able to be reinforced by the additional blowing in of compressed air into the mould chamber (3.13)
and the mould chamber (3.13) is able to be relieved of pressure via the openings (3.27) and via the valve (3.35). - The device according to Claim 6,
characterized in that
the compacting filling frame (3.22) has the guide rods (3.23) and drive cylinder (3.24) arranged on the compacting unit (3.14, 3.18) or on the head frame (1.02),
the compacting filling frame (3.22) for compacting the mould chamber (3.13) has seals (3.28, 3.29, 3.32),
the compacting filling frame (3.22) has an encircling rim surface (3.25) which is able to be pressed onto the seal (3.29) and in which, in addition, the seal (3.29) is able to be pressed by the compacting pressure in the mould chamber (3.13) against the rim surface (3.25)
and the compacting filling frame (3.22) has a staggering (3.10) with respect to the mould box (4.01), in order to avoid a sand accumulation edge during compacting. - The device according to Claims 6 and 13,
characterized in that
the compacting filling frame (3.22) has, as an alternative, a seal (3.32) which is able to be activated by compressed air, which is sunken into an internal groove of the compacting filling frame and which, in the activated state, is able to be pressed into a profile groove (3.33, 3.34) arranged on the compacting unit, and which, in the non-activated state, draws back out from the profile groove (3.33, 3.34) by its elasticity
and the profile groove (3.33) has a bead (3.34), by which a displacement of the seal (3.32) by the compacting pressure in the mould chamber (3.13) is able to be avoided. - The device according to Claim 6,
characterized in that
the model unit (4.02) has a base frame (4.08) with a height (4.25), on which, with or without an intermediate frame (4.09), a negative model (4.12) or, with the use of an intermediate frame (4.09) and a model plate (4.11), a positive model (4.10) is able to be placed, and is able to be centered via the centering elements (4.15, 4.16),
the model plate (4.11) or the model (4.12) has an encircling fitting strip (4.13) consisting of a wear-resistant and slidable plastic or metal, which lies free of play against the model plate (4.11) or against the model (4.12) and which has a slight play, sealing mould sand, of at least 0.1mm and a maximum of 0.5mm to the inner wall of the model filling frame (4.03), whereby a marginal slit (4.14) is formed which is penetrable by air current, and which makes the usual model plate nozzles on the mould box edge of the model plate superfluous,
the surface of the model filling frame (4.03) has the same level or a staggering (4.37) of a maximum of 1mm with the surface of the model (4.11, 4.12), when the model filling frame (4.03) rests on the bearing surface (4.39),
the model filling frame (4.03) has the seals (4.33, 4.34)
and between the inner walls of the mould box (4.01) and of the model filling frame (4.03) a slight staggering (4.04) exists, in order to avoid a sand accumulation edge when pushing up the mould sand into the compacting filling frame (3.22). - The device according to Claims 6 and 15,
characterized in that
the adjustment between the mould box and model takes place by means of the non-moving centering elements (4.15, 4.16) with a tight fit (e.g. H7/h6) and in addition by means of the moving centering elements (4.17, 4.18, 4.20) with a close sliding fit (e.g. H7/g6) and (4.21, 4.22) with a wide sliding fit (e.g. H7/e8) whereby the overall deviation between mould box and model is able to be limited to 0.072mm to 0.178mm or on average to 0.125mm, and the centering- and guide pins (4.17) in the lower region (4.18) have a closely tolerated fine centering (e.g. H7/g6) and in the upper region (4.19) a precise but easy-action guide (e.g. H7/e8). - The device according to Claim 6 and 15,
characterized in that
the model filling frame (4.03) has an encircling flange (4.29, 4.30) which overlaps the bearing surface (4.39) by the extent (4.29a, 4.30a) and protects from sand deposits, in which the flange (4.30) is constructed as a running strip for the model filling frame,
the encircling flange (4.29, 4.30) has a sloping covering (4.31) to avoid sand deposits,
the model filling frame (4.03) has closed-off chambers (4.27) to protect the centering elements (4.17, 4.20) from contamination,
the model filling frame (4.03) has closed-off chambers (4.28) to protect the supporting bolts (4.23) and the spacers (4.24) from contamination
and the base frame (4.08) of the model unit (4.02) and the lifting device (2.01) have the congruent openings (4.26, 4.26a) for the removal of the fluidising stream and for the supply of compressed air for the expansion pressure. - The device according to Claim 6,
characterized in that
the mould sand filling device (2.14) has a chassis (2.22) with the runners (2.23), a conveyor belt (2.20) with a continuously adjustable conveying speed, an apportioning vessel (2.21) with at least three discharge sliders (2.26), a sand delivery hopper (2.15) with at least one aerator (2.19) and a drive cylinder (2.25) with continuously adjustable travelling speed,
the head frame (1.02) has tracks (2.24) on which the mould sand filling device (2.14) is able to be moved to and fro between the positions (2.35) and (2.36) for mould sand filling in layers,
the model-dependent quantity of mould sand is able to be determined with a fixed discharge time by the conveying speed of the conveyor belt (2.20) and by the discharge levels (2.30),
the mould sand discharge (2.30) from the apportioning vessel (2.21) has at least three sections (2.18a) and each section has a chute (2.18) in the sand delivery hopper (2.15),
each section (2.18a) has a vertically adjustable discharge slider (2.26, 2.27) arranged on the apportioning vessel (2.21), whereby the discharge level (2.30) of the mould sand is continuously adjustable,
the discharge sliders (2.26) or the discharge levels (2.30) are adjustable for the partial adaptation of the mould sand quantity during the travelling motion of the mould sand filling device (2.14),
the movable mould sand filling device (2.14) has a stationary sand protection frame (2.11) which is able to be placed onto the mould box (4.01) and is able to be lifted from the mould box for the mould box transportation (1.08), and which surrounds the lower segment (2.16) of the sand delivery hopper (2.15), whereby the mould sand is prevented from spraying out
and the apportioning vessel (2.21) of the mould sand filling device (2.14) is able to be filled from a stationary storage bunker (2.37) and the apportioning vessel (2.21) has sand probes to monitor the filling level. - The device according to Claim 18,
characterized in that
the drives (2.27) for the discharge sliders (2.26) each have a path measuring system for the automatic and continuous adjustment of the discharge levels (2.30),
the drive cylinder (2.25) has a path measuring system, whereby the path of the mould sand filling device (2.14) is able to be divided into grids of a minimum of 1mm and a maximum of 50mm per grid,
each discharge slider (2.26) has a model-dependent discharge level (2.30) for each grid point of the path of the mould sand filling device (2.14),
the discharge levels (2.30) in association with the grid points of the path are able to be recalled from a set of data associated with the respective model and are able to be passed on to the control of the drives (2.27),
the model-dependent conveying speed of the conveyor belt (2.20) is able to be recalled from a set of data associated with the respective model and is able to be passed on to the control of the conveyor belt drive,
the discharge levels (2.30) and/or the conveying speed of the conveyor belt (2.20) have a relation to the mould sand humidity and are able to be adapted automatically thereto
and the sets of data are able to be altered online for optimization. - The device according to Claim 18,
characterized in that
the sand delivery hopper (2.15) has a rectangular internal cross-section for mould sand filling in layers, in which the longitudinal side lying transversely to the direction of movement overlaps the internal region of the mould box (4.01) and the short side (2.40) lying in the direction of movement has 1/3 to 1/6 the internal dimension of the mould box,
the sand delivery hopper (2.15) has, in the lower region, the segments (2.16) and (2.17) for the possibility of installation of the aerators (2.19), in which the segments (2.16) and (2.17) widen towards the bottom, in order to preclude sand deposit edges,
each chute (2.18) of the sand delivery hopper (2.15) has a closure flap (2.31) with a rubber lip (2.32), which are fastened to a continuous shaft (2.33) and are movable by a cylinder (2.34) into a closing and opening position, in which the closure flap (2.31) is in the closed position when the conveyor belt (2.20) is stationary, and is able to be pressed by a rubber lip (2.32) against the conveyor belt (2.20) in order to prevent the sand bank from trickling down onto the model and the mould box
and each discharge slider (2.26) has a control element (2.28) for the mould sand stream, which consists of a plate suspended vertically by gravity and which is lifted from the mould sand stream and activates a sensor (2.29). - The device according to Claim 18,
characterized in that
the internal dimension of the sand protection frame (2.11) is slightly smaller by the extent (2.10) than the internal dimension of the mould box (4.01), in order to avoid a sand deposit surface on the mould box,
the sand protection frame (2.11) is able to be deposited by means of the short stroke cylinder (2.12) for mould sand filling onto the mould box (4.01) and is able to be lifted from the mould box for the mould box transportation (1.08),
the piston rods of the short stroke cylinders (2.12) have a cap-type connection (2.13) to the sand protection frame (2.11), in order to avoid a mechanical positive synchronism of the piston rods
and the sand protection frame (2.11) has a cleaning brush (2.11a), with which the mould box surface is cleaned during mould box transportation (1.08). - The device according to Claim 6,
characterized in that
the model changing device in the workstation (A) has a lifting device (5.01) provided with drive-free runners, and the workstation (B) has a lifting device (5.02) provided with drive-free runners,
the lifting devices (5.01) and (5.02) have respectively four lifting cylinders (5.03) with a continuous piston rod (5.04) as guide element,
the model changing device in axis (A) has a driven roller conveyor (5.09) and in axis (B) a driven roller conveyor (5.10),
the model changing device for transferring the model/filling frame units (4.04) from axis (A) to axis (B) has a shuttle carriage (5.11) which is movable on tracks and is provided with driven runners,
the model changing device in the workstation (A) has a draw-in cylinder (5.06) with an electromagnet (5.07) which is able to be connected and disconnected, whereby the model/filling frame unit (4.04) is able to be picked up and drawn into the end position before reaching the drive-free runners of the lifting device (5.01)
and the model changing device in the workstation (B) has an evacuation cylinder (5.08), whereby the model/filling frame unit (4.04) is able to be evacuated from the drive-free runners of the lifting device (5.02) onto the driven roller conveyor (5.10). - The device according to Claim 22,
characterized in that
the lifting devices (5.01) and (5.02) are only able to be lifted and lowered empty and free of load when the lifting devices (2.01) and (3.01) are lifted without model/filling frame unit (4.04),
the piston rods (5.04) have a cap-type fastening (5.05) with the lifting table (5.01) or (5.02), in order to avoid a positive synchronism of the lifting cylinders (5.03), and the lifting cylinders (5.03) are able to be adjusted to an approximate synchronism by means of throttle valves. - The device according to Claims 22 and 23,
characterized in that
the model changing is able to take place without extending the cycle time during the mould box transportation (1.08), in which a model/filling frame unit (4.04) is able to be moved in from the driven roller conveyor (5.09) onto the raised lifting device (5.01) of the workstation (A) and at the same time a model/filling frame unit (4.04) is able to be moved out from the raised lifting device (5.02) of the workstation (B) onto the driven roller conveyor (5.10),
on model changing, a model filling frame unit (4.04) is able to be lifted by means of the lifting device (2.01) from the runners of the raised lifting device (5.01) and a model filling frame unit (4.04) is able to be deposited by means of the lifting device (3.01) onto the runners of the raised lifting device (5.02),
in each case a model pair consisting of the OK model/filling frame unit (4.04) and UK model/filling frame unit (4.04) is able to be exchanged in two successive working cycles or mould box transportations (1.08)
and the OK/UK model/filling frame units (4.04) are able to be re-equipped for a later model change on the handling sites (5.13) or are able to be exchanged for another pair on the park track (5.12). - The device according to any of Claims 22 to 24,
characterized in that
the moulding machine operation is able to be carried out with a continual model changing with two model pairs i.e. with two OK model/filling frame units (4.04) and with two UK model/filling frame units (4.04),
the moulding machine operation is able to be carried out with a continual model changing and with three or more model pairs with corresponding extension of the driven roller conveyors (5.09) and (5.10),
with moulding machine operation with two or more model pairs, the models are able to be handled at the handling stations (5.13) without an extension of the cycle time, e.g. the setting of iron chills and/or exothermic feeders
and with a requirement for longer handling of a model or of a model pair, the period of dwell thereof at the handling sites (5.13) is able to be extended in that a model pair without a handling requirement is cast two or more times and thereafter the model pair with a longer handling requirement is respectively exchanged into the moulding machine for a single casting. - The device according to Claim 6,
characterized in that
the moulding machine is able to be embodied as a twin moulding machine with an approximate doubling of output, in which the workstation (A) has two mould sand filling devices (2.14) which are able to be moved transversely to the mould box transportation direction (1.08), and the workstation (B) has two compacting units (3.14, 3.18) each with a compacting filling frame (3.22),
in the workstation (A) at the same time a model pair consisting of upper and lower box model is able to be joined together with the corresponding mould boxes (4.01) to an upper and lower box mould unit (4.05) and is able to be filled with mould sand,
in the workstation (B) at the same time an upper and lower box mould unit (4.05) is able to be compacted and released
and on mould box transportation (1.08), the mould boxes (4.01) are able to be moved by a double division.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10321532A DE10321532A1 (en) | 2003-05-14 | 2003-05-14 | Sand mold box machine has workstations to fill the boxes with sand and compress the sand filling, without recirculating or reciprocating filling frames to shorten cycle times and increase sand filling times |
DE10321532 | 2003-05-14 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1477251A2 EP1477251A2 (en) | 2004-11-17 |
EP1477251A3 EP1477251A3 (en) | 2005-04-06 |
EP1477251B1 true EP1477251B1 (en) | 2008-02-27 |
EP1477251B8 EP1477251B8 (en) | 2008-07-16 |
Family
ID=29414367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04011229A Expired - Lifetime EP1477251B8 (en) | 2003-05-14 | 2004-05-12 | Method and foundry moulding machine for the manufacture of sand moulds in flasks |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1477251B8 (en) |
AT (1) | ATE387273T1 (en) |
DE (2) | DE10321532A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2472600C1 (en) * | 2011-05-24 | 2013-01-20 | Закрытое Акционерное Общество "Литаформ" | Method of producing moulds and device to this end |
CN104001871B (en) * | 2014-04-15 | 2017-07-14 | 青岛博大铸造机械有限公司 | Vertical parting molding machine |
JP6235524B2 (en) | 2015-04-17 | 2017-11-22 | ファナック株式会社 | Sand mold manufacturing system and sand mold manufacturing method for manufacturing sand mold |
CN114160752B (en) * | 2021-11-25 | 2024-04-30 | 成都桐林铸造实业有限公司 | Casting sand filter equipment |
CN114425604B (en) * | 2021-12-28 | 2024-06-21 | 株洲凯丰实业股份有限公司 | Soluble core mould of gas turbine bearing seat |
CN115194090A (en) * | 2022-07-25 | 2022-10-18 | 共享智能装备有限公司 | 3D printing sand mold and casting method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK0731742T3 (en) * | 1994-05-18 | 1998-01-19 | Kuenkel Wagner Service Und Vertr | Pair filling and casting of sand molds |
DE19848049A1 (en) * | 1998-10-19 | 2000-04-20 | Josef Mertes | Foundry molding machine |
-
2003
- 2003-05-14 DE DE10321532A patent/DE10321532A1/en not_active Withdrawn
-
2004
- 2004-05-12 EP EP04011229A patent/EP1477251B8/en not_active Expired - Lifetime
- 2004-05-12 DE DE502004006296T patent/DE502004006296D1/en not_active Expired - Lifetime
- 2004-05-12 AT AT04011229T patent/ATE387273T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE10321532A1 (en) | 2003-12-04 |
EP1477251A2 (en) | 2004-11-17 |
ATE387273T1 (en) | 2008-03-15 |
DE502004006296D1 (en) | 2008-04-10 |
EP1477251A3 (en) | 2005-04-06 |
EP1477251B8 (en) | 2008-07-16 |
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