WO2010054809A2 - Outil de coulée et machine à noyauter - Google Patents

Outil de coulée et machine à noyauter Download PDF

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Publication number
WO2010054809A2
WO2010054809A2 PCT/EP2009/008046 EP2009008046W WO2010054809A2 WO 2010054809 A2 WO2010054809 A2 WO 2010054809A2 EP 2009008046 W EP2009008046 W EP 2009008046W WO 2010054809 A2 WO2010054809 A2 WO 2010054809A2
Authority
WO
WIPO (PCT)
Prior art keywords
frame
casting tool
tool according
mold
side plates
Prior art date
Application number
PCT/EP2009/008046
Other languages
German (de)
English (en)
Other versions
WO2010054809A3 (fr
Inventor
Ivo Herzog
Original Assignee
Herzog & Herzog Holding Und Service Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Herzog & Herzog Holding Und Service Gmbh filed Critical Herzog & Herzog Holding Und Service Gmbh
Priority to EP09751821.1A priority Critical patent/EP2385883B1/fr
Publication of WO2010054809A2 publication Critical patent/WO2010054809A2/fr
Publication of WO2010054809A3 publication Critical patent/WO2010054809A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B22C7/062—Sealing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B22C7/067—Ejector elements

Definitions

  • the invention relates to a casting tool for the production of cast products, in particular of cores for sand casting products, of die-cast products and chill casting products.
  • a generic casting tool has a support device consisting of a first and a second support member which are movable toward and away from each other in a joining direction. Furthermore, such a generic casting tool has at least two molded parts, of which in each case a first molded part is attached to the first support part and the second molded part is attached to the second support part.
  • the mold parts each have a mold cavity facing one another, the mold cavities of the mold parts jointly defining the shape of at least one workpiece to be produced, such as a cast core, when the first and second mold parts abut one another and the mold is thus closed.
  • the invention also relates to a core molding machine with a generic casting tool.
  • Generic casting tools are known from the prior art.
  • mold core tools serve, for example, the production of cores, for example of sand cores or ceramic cores, which are used in subsequent casting operations to keep as lost molds cavities of the workpiece to be cast, for example, metallic casting material.
  • cores for example of sand cores or ceramic cores
  • the production takes place in that the common volume formed by the mold cavities of the molded parts described is filled with pressurized sand mixture, which is subsequently gassed, so that a binder bonds the individual sand grains together to form a solid sand core.
  • This solidified sand core is subsequently removed from the core mold and placed in a mold.
  • the limited positioning of the molded parts is largely due to the inaccurate tolerance compliance of the molding boxes.
  • the molding boxes are usually produced as castings, which are subsequently machined. This machining takes place with respect to the pockets through which the moldings are guided and in which the moldings are fastened, by a milling operation which can not ensure sufficient conformance to achieve the tightness between the moldings in the closed state of the mold.
  • the disadvantage of the cast or welded molding boxes is also in the high mass of such boxes. This is often so high that the molding boxes can not be stored in high shelves, but must be stored on the usually strongly limiting floor area.
  • the object of the invention is to develop a generic casting tool such that the disadvantages of the prior art are eliminated or at least mitigated.
  • one of the support members has a first circumferential frame which surrounds the molded part attached to this support member, wherein the frame is composed as a multi-segment frame of at least two frame segments which are interconnected via positively acting connection means.
  • At least part of the supporting part usually welded or cast in the prior art is composed of segments which are not connected to each other either by a common casting or by welding seams.
  • the frame segments are connected to each other by positively acting connection means, in particular by screws, so that during the production of such a frame depending on the manufacturing accuracy of the segments, a very accurate dimensional compliance of the overall frame can be achieved without being distorted by thermal load, the output components.
  • frame segments are understood in the context of the invention, those parts of the frame which provide at least part surfaces of the molding facing inner surface of the frame.
  • a significant advantage of the described structure is that in the manner of a modular standard parts can be used as segments of the frame, which are selected depending on the required dimensions of the casting tool and interconnected.
  • the connection of the segments is preferably circumferential, the interconnected segments thus form a closed segment ring in the form of the first frame.
  • Another advantage of the construction of the frame of segments, which are combined with each other via positively acting connection means is that this allows the use of materials that are poor or not weldable or pourable.
  • materials can be used which combine a particularly high tensile strength with a low specific weight.
  • a casting tool according to the invention has at least two molded parts which together define a shape for a workpiece, in particular for a core such as a sand core. However, it may also be provided in each case a plurality of mold parts on the two support parts.
  • the mold parts fixed to the first support part are referred to as first mold parts
  • the mold parts fixed to the second support part are referred to as second mold parts.
  • the first molded part and the second molded part form a common shape, which in the closed state has a cavity in the negative mold of the workpiece to be produced, in particular of the core to be produced, by the two-sided mold recesses.
  • the frame can be matched to the size of the moldings such that it serves as a guide. This is achieved by a close clearance fit between the moldings and the frame. It is preferred, however, that in a manner further explained below, the frame has a free inner surface which is significantly larger than the base surface of the molded parts, so that a guiding function is not taken over by the frame.
  • a described multi-segment frame is provided only on one of the supporting parts, which surrounds both molded parts in the contiguous state of the molded parts.
  • the casting tool is preferably a core molding tool for producing casting cores with the features specific for this purpose, such as, for example, the presence of a squeegee, which levels the excess sand in the area of sand injection holes after being shot.
  • the frame is attached to the first support part.
  • the first support member is in the context of the following description of that support member which is raised in the course of demolding of the produced workpieces, in particular the cores produced, relative to the stationary second support member.
  • the motion sequences are only relevant with regard to the relative displacements of the components, so that a lowering of the second support part can likewise be provided in the case of local strength of the first support part.
  • the preferred embodiment in which the first frame is part of the first support member, holds in the event that the first support member is provided above the lower support member, the advantage that the first frame during removal automatically together with the first support member relative to the second support member is raised, so that the bottom remaining lower part of the tool with the second support member and the second molded part attached to a problem-free removal of the produced workpiece, in particular of the manufactured core, for example via a so-called rake or a handling system allows without the first frame is a hindrance.
  • the first support part on a first mounting plate on which the attached to the first support member molding is attached and to which also the first frame is attached.
  • a plate As a plate is considered in connection with the first mounting plate, a component which provides at least a completely flat surface for fixing the first frame and the first molded part. By definition, no part of this mounting plate projects beyond an area that serves to fix the first moldings.
  • the use of such at least one side completely flat mounting plate is advantageous because such a plate with comparatively little effort while maintaining low tolerances can be produced, for example by surface grinding. This has the consequence that also fixed to the plate first molding can be aligned very accurately.
  • the flat side of the mounting plate, which faces towards the first molded part attached to it preferably has a level tolerance of less than 0.2 mm, preferably less than 0.1 mm, in particular less than 0.05 mm.
  • the first frame is preferably also fastened by means of detachable positively acting connection means such as screws.
  • connection via positive connection means makes it possible to completely dispense with defective thermal influence during the production of the first support member.
  • the solubility of these connecting means also allows the fast coupling of the first frame from the first mounting plate. This solubility is advantageous because the casting tool according to the invention is basically suitable due to its construction, to be operated completely without the frame, so that this frame can be omitted on a case by case basis.
  • the second support part has a second mounting plate to which the second molded part attached to the second support part is attached.
  • the plate allows by their design the production of a closely toleranced flatness, for example achievable by means of surface grinding, so that in a design with two mounting plates high accuracy, the moldings when closing the mold in Allows the partition plane almost perfectly abut each other and thus even self effectively seal the jointly formed form, without the need for this necessarily the frame.
  • connection plates With respect to both mounting plates, it is true that they should also be able to be fixed to their connection components with small tolerances that these are preferably attachment plates whose parallelism tolerance with respect to the two opposite sides of the plate is also less than 0.2 mm, preferably less than 0.1 mm, in particular less than 0.05 mm.
  • the second support part has a second circumferential frame, which is attached to the side facing away from the second mold part or the second mold parts of the second mounting plate. While the first frame serves the purpose of protecting and optionally guiding the moldings, as well as the purpose of providing a supplemental seal against the environment, the second frame is provided as a solidly force-transmitting component over which the forces are guided by which the moldings during the introduction of the casting material, so for example the sand, are pressed together.
  • This second frame is preferably also designed as a multi-segment frame.
  • the second frame In addition to its function as a force-conducting component between a machine table and the second mold part of the second frame also forms a protective cover for a lifting device of the casting tool, which serves the purpose of ejecting the finished workpiece or the finished core of the second molded part.
  • the second frame can be fastened directly on a machine table or be connected by means of an adapter plate on the side facing away from the second mounting plate side with the machine table.
  • both frames these preferably have four side plates oriented at right angles to one another as main segments, wherein the side plates are connected to one another directly or indirectly via intermediate segments, in particular via corner segments.
  • the structure of the frame of at least four side plates represents a particularly simple design.
  • the side plates can be directly connected to each other, for example, that they all or part of them have frontal holes for connecting screws and / or provided at the corner near the end of the adjacent side plates through holes for those connecting screws.
  • a direct connection is also possible in that on the side plates in each case a 45 ° -shank is provided and the connecting screw connects the side plates perpendicular to the miter plane.
  • the side plates only have frontal holes and are connected to each other via a total of four corner segments.
  • the use of simple side plates reduces the manufacturing effort and significantly reduces the production time, since standardized standard plates can be used, which only have to be adapted to the specific application in terms of their height in the joining direction and their length transverse to the joining direction.
  • the corner segments are particularly advantageous because only frontal holes must be introduced through them in the side plates. Among other things, this has the consequence that all four side plates can be formed identically with frontal holes and without through holes.
  • the corner segments are also well suited to provide additional functions, such as points of attack for lifting means, by means of which handling in particular the first frame is possible.
  • both frames can also have several side plates per side, wherein the side plates are arranged one behind the other in the joining direction of the tool.
  • these side plates are connected to each other, for example by screws. It is also possible to use continuous corner segments over which the several side panels of a page are indirectly connected to each other.
  • All four side plates can be made identical in cross section and possibly differ only in terms of their length.
  • at least two opposing side plates are provided with recesses which allow the engagement of a gripping instrument for handling the upper support member. These recesses are preferably provided on the outside upper edge of the respective two side plates in the form of a milled track, preferably only by connecting the respective frame with the first and second mounting plate, the recess is closed upwards and thus can fulfill their purpose.
  • the corner segments are preferably in the joining direction extended profile sections, in particular continuous casting profile sections formed.
  • these continuous casting profiles are produced directly with the cross section of the corner segments, so that only a small post-processing is required.
  • standard profiles such as square profiles, which receive the shaping of the corner segment by subsequent machining.
  • the respective preparations for the positive connection means with the side plates are still provided, for example, aligned transversely to the extension of the profile holes for connecting screws.
  • lifting lugs are attached, wherein the lifting lugs are formed and mounted so that they do not protrude the escape of the adjacent to the respective corner segment side plates.
  • the lifting lugs are therefore provided so that they are in a state of rest in a free space, which is bounded on the one hand by the corner segment and on the other hand by two imaginary planes, each corresponding to the plane on which is the outside of the respective adjacent side panels.
  • This design allows the entire casting tool, or at least the first or the second frame, to be supported on a base surface which does not need to be larger than the surface defined by the spacing of the outside of the respective opposite side plates, in spite of the presence of the lifting eyes.
  • the purpose of the lifting eyes is the handling of the supporting parts or the frame, which can be transported in a simple manner by means of the lifting lugs.
  • a casting tool according to the invention which has a first and a second frame, uses side plates on the first and second frame which, with regard to their height in the joining direction, with respect to their length transversely to the joining direction, with respect to their thickness, with respect to the arrangement their connection holes for connection to the corner segments and / or a mounting plate and / or with respect to the material match. It is already advantageous if individual of these properties match. It is not absolutely necessary that all side plates of the respective frames are identical. One advantage already arises if one or two side plates of both frames have individual features of identical design in each case. The conformity with respect to the mentioned features is the above-mentioned modular principle.
  • a variety of processing steps on the side plates can be performed by the similar design of the side plates of both frames in a basic processing, which is not determined by this basic processing, whether it is side plates of the first or the second frame. This makes it possible to have all the components available with a comparatively small bearing holder in order to produce a casting tool within a short time, which is adapted to individual specifications.
  • side plates are conceivable that some processing steps, such as the production of a groove for a sealant on the first frame or the preparation of connection holes for connection to a machine table or an adapter on the second frame still need to be carried out purpose-specific, but these steps are short-term to implement.
  • corner segments of the first and the second frame with respect to the height of the corner segments in the joining direction, with respect to the cross section of the corner segments, with respect to the connection holes for connection to the side plates and / or the lifting lugs and / or of the material of the corner segments.
  • connection holes for connection to the side plates and / or the lifting lugs and / or of the material of the corner segments.
  • the first and second mounting plates preferably conform to one or more properties, such as the dimensions of the mounting plates transverse to the joining direction, the thickness of the mounting plates, the connection holes for connection to the side plates and / or the moldings and / or with respect to the Material of the mounting plates.
  • the fastening plates that extensive basic machining is possible without this being accompanied by a purpose of fixing the fastening plate as the first or second fastening plate.
  • Possible adjustments that may be required beyond the basic processing are, for example, the Insertion of bullet holes on the first mounting plate or holes for ejector pins on the second mounting plate.
  • the first frame can be provided for guiding the at least one first molded part.
  • the frame is sized so that there is a close clearance fit between it and the first mold part or parts. It is advantageous, however, if the first molded parts from the first frame with respect to a plane whose normal vector coincides with the joining direction, circumferentially spaced by at least 2mm. With such a design, the frame can not assume any guiding function as intended. The orientation of the at least one first molded part is therefore achieved solely by fixing it to the mounting plate. However, this is sufficient for a sufficiently accurately worked first mounting plate, so that can be dispensed with the leadership function of the frame.
  • the frame can be made larger in accordance with its free cross-section, so that a collision between the frame and the mold parts during the installation of the casting tool is prevented.
  • a circumferential distance of more than 2mm is provided, in particular more than 5mm, preferably even more than 20mm.
  • the first frame preferably extends in the joining direction in the direction of the second support part less than the summed thickness of the first and the second molded part.
  • the first frame rests only on the mounting plate to which it is attached, while it is at least slightly spaced from the second mounting plate. He therefore does not transmit any powers himself.
  • the forces applied to the casting tool forces are therefore transmitted without exception or predominantly on the moldings themselves, so that these be pressed particularly close together.
  • the height of the first frame is preferably dimensioned such that it is smaller by at least 0.2 mm, in particular by at least 0.3 mm, than the common thickness of the two molded parts. As mentioned above, it requires a sufficiently accurate positioning and design of the moldings no additional sealing.
  • a peripheral seal is provided on the facing in the direction of the opposite support member side of the first frame, which rests circumferentially on the opposite support member in the closed mold.
  • the second frame it is advantageous if it at least partially surrounds a lifting device which has at least one ejector pin extended in the joining direction, which can be inserted through an ejector bore in the second fastening plate and / or in the second molded part into the mold recess of the second molded part ,
  • This lifting device makes it possible to push out the produced workpiece or the manufactured core from the recess of the second molded part, wherein the arrangement of the preferably several ejector pins can be adapted individually to the shape of the workpiece or of the core.
  • the lifting device is preferably operatively coupled to the first support member so that a spacing of the support members from each other in the course of demolding also an actuation of the lifting device and thereby causing extension of the ejector pins and thus ejection of the manufactured workpiece or core result.
  • inventive design of a casting tool can be used in casting tools, in particular core-forming tools, of any size. It is particularly preferred in casting tools in which a covered by the first and / or second frame surface whose normal vector coincides with the joining direction is at least 600mm x 600mm, preferably at least 1,000mm x 1,000mm.
  • the design according to the invention is particularly advantageous in the case of such large tools, since the production methods of the prior art, in particular the casting production and the welding production of the molding boxes, are particularly disadvantageous in these tools since the respectively required post-processing and the negative effects of the thermal influences particularly high positional inaccuracy of the molded parts in operation result.
  • the casting tool is characterized in that the first and / or the second frame at least partially made of a material having a tensile strength of at least 400N / mm 2 , in particular of at least 450 N / mm 2 , preferably the side plates and or the corner segments made of this material, and further preferably, the material is an aluminum alloy.
  • the high tensile strength has been found to be advantageous in particular to ensure the position positioning of the molded parts during the manufacturing process safely.
  • all segments of the frame and preferably also the mounting plates are made of such a material.
  • High-strength to very high-strength aluminum alloys have proven particularly suitable, for example EN-AW 7075.
  • the proposed design of the casting tool with a multi-segment frame is expedient.
  • the invention further relates, in particular as a development of the above-described design, a generic casting tool, wherein the first support member and / or the second support member has a mounting plate to which the molded part attached thereto is attached and at least on its side facing the molding completely flat. Preferably, this side is ground flat.
  • this side is ground flat.
  • Such a first frame is provided, which preferably corresponds to the first frame described above.
  • a one-piece frame may be made by casting or welding. It preferably has four mutually cohesively connected side portions, which surround a space in which, for example, can be arranged to be fixed to the mounting plate moldings.
  • the frame is preferably fastened to the mounting plate by means of releasable, positive locking connection means so that it can be removed for alignment purposes to allow better accessibility of the mold parts.
  • the form-fitting acting In addition, connecting means cause the flat-ground fastening plate not to be distorted by a thermal joining process.
  • the invention further relates to a core forming machine with a casting tool in the form of a core forming tool according to the above description.
  • a core forming machine is equipped with a feeding device by means of which sand can be injected under high pressure into the moldings.
  • Fig. 1 shows a complete inventive casting tool in the form of a core mold in an exploded view.
  • FIG. 2a to 2f shows a sectional view of the core mold according to Figure 1.
  • Fig. 3 shows a partially sectional view of a frame of the core tool according to the preceding figures.
  • FIG. 1 shows an inventive casting tool in an exploded view.
  • This casting tool is a core mold, which comprises the following main components, which are explained in the order from top to bottom below.
  • a first mounting plate 10 forms on the upper end of the core molding tool.
  • a first frame 20 can be screwed thereto by means of screws, not shown, so that the first fastening plate 10 and the first frame 20 are connected together to form a first, upper support part 10, 20 for molded parts 30 can.
  • a total of four mold tops 30 are attached.
  • These upper mold parts 30 each have a mold recess 33, not shown in FIG. 1, wherein the four mold recesses 33 of the mold top parts 30 together with corresponding upwardly open mold recesses 43 of four corresponding mold bottom parts 40 each form a closed cavity, which forms a negative mold represent each produced by means of the core mold core.
  • the four mold bases 40 are provided for attachment to a lower, second mounting plate 50, on the underside of which a second frame 60 is secured.
  • an adapter plate 70 connects, which is provided for fixing the core mold on a machine table.
  • a lifting plate 80 is arranged, which has a plurality of vertically extended Auswerferite 82, corresponding to their positions in the lower mounting plate 50 and in the mold parts 40 holes 52, 42 are provided through which the Auswerferite 82 into the cavity 33, 43 formed by the upper mold parts 30 and the lower mold parts 40 can be driven into it.
  • the upper mounting plate 10 has a thickness of 30mm and width and length of 1,400mm each.
  • the mounting plate is ground flat both at its upper side 10a and at its lower side 10b, wherein the maximum deviation from the flatness is 0.05 mm in each case and the parallelism of the upper side 10a and the lower side 10b also amounts to a maximum of 0.05 mm.
  • the upper mounting plate 10 is made of steel 1.2312 / 2080, which is not pourable, but is used for the concrete application as a prefabricated plate with a predetermined thickness, which has been edited only by milling in terms of their external dimensions.
  • a plurality of connecting holes 11 is provided circumferentially, which serve the releasable connection of the mounting plate 10 with the frame 20.
  • connecting holes 14 are also provided for fixing the upper mold parts 30.
  • bullet holes 12 are provided, which break through the upper mounting plate 10 and which serve the shooting of the casting material, in this case the shot of sand.
  • guide bores 15 are provided, which serve to guide a nozzle plate, not shown, as well as a non-illustrated squeeze plate.
  • the lower mounting plate 50 is formed. Its thickness of 30mm and its width and length of 1,400mm each agree with the upper mounting plate 10 via. Also in accordance with the upper mounting plate connecting bores 51, 54 are provided in the edge regions or in the center of the second mounting plate 50, which serve in the case of the second mounting plate of the connection to the second frame 60 and with the mold bottom parts 40.
  • the material of the mounting plates 10, 50 is also the steel 1.2312 / 2080. Notwithstanding the first mounting plate 10, the above-mentioned drilling ments 52 provided in the lower mounting plate 50 for the Auswerferite 82.
  • the mounting plates 10, 50 thus agree with respect to all features with the exception of the bullet holes 12 and the bores 52 for the Auswerferite 82 match.
  • the upper frame 20 consists of a total of eight segments, which are shown separated from each other in Fig. 1 for better understanding.
  • frame 20 are each opposite side plates 22 and side plates 24 as the main segments use, which are connected to each other via corner segments 26.
  • the side plates 22 are unprocessed plates which have been machined to the desired height of 210 mm and the desired length of 1100 mm, for example only by means of milling.
  • the other side plates 24 differ from this only in that on the outer side in the upper region a groove 24a has been incorporated by milling. This groove 24a forms after attachment of the frame 20 to the upper mounting plate 10 has an engagement channel, by means of which a storage or handling of the support member consisting of mounting plate 10 and frame 20 is simplified.
  • the side plates 22, 24 also each have connecting holes 21 on its upper side, which are arranged to connect the mounting plate 10 with the frame 20 corresponding to the connecting holes 11 of the upper mounting plate 10.
  • the side panels 22, 24 are connected by the total of four corner segments 26, which are each manufactured as a section of a strand profile and having an outer recess 26a.
  • the side plates 22, 24 have connecting bores at the end for connection to the corner segments 26, correspondingly provided in the recess 26a of the corner segments 26 in the direction of the side plates 22, 24 aligned connection bores. These holes in the side plates 22, 24 and in the corner segments 26 allow the segments 22, 24, 26 in a simple and fast manner to connect to each other to the overall frame 20.
  • the design with the outer dimensions of the frame 20 significantly influencing side plates 22, 24 allows an easy adjustment of the size of the frame 20 to specific requirements, especially in terms of size.
  • the product range of a manufacturer of core molding tools according to the invention preferably comprises frames which can be supplied oriented to fixed grid dimensions of various sizes, the step size in the two main directions of extension of the frames preferably being 100 mm, so that the manufacturer only has to provide a few types of side plates to be able to deliver any size quickly within the limits of the defined grid dimensions.
  • the segments 22, 24, 26 are invariably also made of the difficult to cast aluminum alloy EN-AW 7075 and therefore comparatively light.
  • the lower, second frame 60 corresponds largely to the upper, first frame 20. It is also composed of corner segments 66 and side plates 62, 64, wherein all with respect to the frame 20 mentioned features are realized identically. One difference is that the side parts 62, 64 of the lower frame 60 additionally have connecting holes 63 which are formed as downwardly open blind holes with a thread and serve to fix the lower frame 60 to the adapter 70, which in turn fixed to the machine table can be. These connecting holes 63 exemplarily illustrated in FIG. 1 by only one connecting bore 63 are not required in the upper frame 20.
  • the upper frame 20 instead has a circumferential groove 23 which extends along the side plates 22, 24 and along the corner segments 26 and which serves to receive a sealant such as a sealing cord, the purpose of which will be explained below.
  • Another difference between the frames 20, 60 is that in the recesses 66a of the corner segments 66 lifting eyelets 68 are screwed. These lifting lugs 68 and a fastening ring 69 provided thereon are arranged by their recessed attachment to the corner segments 66 in the illustrated state such that they do not collide with the escape of the outer surfaces of the side plates 64, 62 and thus not defined by the outer dimensions of the frame base protrude.
  • the vast majority of features in both frames are equally realized, so that there is also the possibility vorzuhalten the side panels and the corner segments in a basic form, without this basic processing of a determination with respect to the specific purpose of use brings. Instead, it may be determined on a case by case basis by the preparation of the connection holes 63 and the holes for the lifting lugs 68 and the circumferential groove 23, as the side plate or the corner segment to be used.
  • the above-mentioned upper mold 30 are provided, which have connection holes 34, by means of which they can be screwed with the aid of the connection holes 14 in the upper mounting plate 10 at this. Furthermore, the upper molds 30 have shot holes 32, which are arranged corresponding to the bullet holes 12 in the upper mounting plate 10.
  • the upper connection surfaces 30a of the upper mold parts 30 are machined with the same accuracy as the lower side 10b of the mounting plate 10, for example flat ground, so that the mold Upper parts 30 with respect to the joining direction 2 relative to the mounting plate in the bolted state have a highly accurate positioning.
  • the lower mold parts 40 are formed. These also have on their side facing in the direction of the mounting plate 50 side 40b connecting holes 44 for attachment to the lower mounting plate 50 by means of there correspondingly provided terminal holes 54. Instead of the bullet holes 32, however, the already mentioned holes 42 are provided for the ejector pins 82 in the lower mold parts 40. As with the upper mounting plate 10 and the upper mold parts 30, the lower sides 40b of the lower mold parts 40 are machined with the same precision as the upper side 50a of the lower mounting plate 50 for exact positioning in the joining direction 2.
  • the last essential component is the lifting plate 80 with the ejector pins 82.
  • This lifting plate 80 is not fixed to any of the described components. It can be lifted by a mechanism, not shown separately relative to the lower support member 50, 60, so that after separation of the upper support member 10, 20 from the lower support member 50, 60 for the purpose of demolding by a common upward movement of the lifting plate 80 and the Auswerferite 82 a pressing out of the then lying in the mold cavity 43 core is possible.
  • FIGS. 2a to 2f show the composite core forming tool of FIG. 1 in a simplified production process of sand cores.
  • the state in the preparation of the core mold can be seen.
  • the upper frame 20 is removed in advance, so that the support member only consists of the mounting plate 10 which is connected in a manner not shown with a lowerable lifting device, not shown, which is provided with connections for feeding sand as core casting material.
  • the upper mounting plate 10 is lowered together with the mold upper parts 30 until the mold tops 30 rest with their flat-ground bottoms 30b in the correct orientation on the likewise ground flat top surfaces 40a of the mold parts 40.
  • the upper mounting plate 10 is raised together with the mold upper parts 30 so far that subsequently the frame 20 can be attached to the upper mounting plate 10.
  • FIG. 2b The state achieved after attachment of the frame is shown in FIG. 2b.
  • This state represents the initial state for the subsequent manufacturing process of the sand cores.
  • the described alignment can be carried out as part of the manufacturing process already at the manufacturer or alternatively take place directly on a core forming machine whose relatively height-adjustable hood can serve as a lifting device in this case.
  • the actual manufacturing process for the production of sand cores begins.
  • the upper support member consisting of the upper mounting plate 10 and the upper frame 20
  • the lower sides 30 b of the Molded tops 30 come again on the tops 40a of the mold parts 40 to rest.
  • the lower end faces of the frame 20 do not touch the lower mounting plate 50, but are still spaced from it by about 0.5mm. Due to the circumferential sealing cord 27, which is inserted in the groove 23, a gas-tight closure of the space formed by the upper mounting plate 10, the lower mounting plate 50 and the frame 20 is still made.
  • the sand volumes which up to this time have not yet been connected to a solid body, are subsequently gassed in mold cavities 33, 43, wherein this can be done through the injection openings 12, 32 or separate gassing openings provided for this purpose.
  • the gas can, with sufficiently accurate orientation of the mold parts 30, 40, the mold recesses 33, 43 by annular gaps between the walls of the bores 42, 52 and the therein Auswerferiten 82 or by specifically here- leave for intended degassing. In any case, it is ensured that the complete volumes are supplied with gas, so that solidification of the sand into solid sand cores 90 results in homogeneous form.
  • the gas is flushed out.
  • the upper support member 10, 20 is raised together with the mold upper parts 30, wherein the sand cores 90 initially remain in their position in the mold recesses 43 of the mold parts 40. Only after completion of the upward movement of the upper support member 10, 20 and the mold tops 30, shown in Figure 2e, the lifting plate 80 is raised so that the ejector pins 82 penetrate into the Formausneh- 43 of the mold parts 40 and the sand cores 90 lift.
  • FIG. 3 again shows a section through the core mold according to the invention. It is a partially sectional view of the frame 20, wherein the frame 60 is constructed in the manner described above almost identical. It can be seen how the corner segments 26 are connected to the side plates 22, 24 via the end-side screw connections. The contact surfaces on the side plates and / or on the corner segments, which are precisely produced, for example, by milling, ensure that the frame has exactly the desired size. Has ße, without the need for an adapted mold must be created or a complex welding process with complex post-processing phase is needed.

Abstract

L'invention concerne un outil de coulée destiné à la fabrication de produits de coulée, notamment de noyaux (90) pour des produits de coulée en sable, et comportant un dispositif support, composé d'un premier et d'un deuxième élément support (10,20,50) mobiles l'un sur l'autre dans un sens d'aboutage (2), et au moins deux moules (30,40), le premier moule (30) étant fixé à un premier élément support (10,20) et le deuxième moule (30) étant fixé à un deuxième élément support (50,60). Les moules (30,40) présentent chacun un évidement (33,34) qui délimitent ensemble la forme d'au moins un noyau (90) à produire lorsque le premier et le deuxième moule (30,40) sont contigus. Selon l'invention, un des éléments supports (10,20) comporte un premier cadre (20) périphérique qui entoure le moule (30) fixé à l'élément support (10,20), le cadre étant un cadre en plusieurs parties composé d'au moins deux segments de cadre (22,24,26) reliés ensemble par des moyens d'assemblage par complémentarité de forme. L'outil de l'invention sert de moule à noyaux de construction particulièrement simple et rapide.
PCT/EP2009/008046 2008-11-14 2009-11-12 Outil de coulée et machine à noyauter WO2010054809A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09751821.1A EP2385883B1 (fr) 2008-11-14 2009-11-12 Outil et machine à noyauter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008058764.8 2008-11-14
DE102008058764A DE102008058764B4 (de) 2008-11-14 2008-11-14 Gusswerkzeug und Kernformmaschine

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WO2010054809A2 true WO2010054809A2 (fr) 2010-05-20
WO2010054809A3 WO2010054809A3 (fr) 2010-07-22

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US (1) US20100122790A1 (fr)
EP (1) EP2385883B1 (fr)
DE (1) DE102008058764B4 (fr)
WO (1) WO2010054809A2 (fr)

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CN104139156B (zh) * 2014-07-30 2017-05-24 安徽马钢重型机械制造有限公司 一种高炉钢槽铸造用泥芯芯盒框结构
CN106378416B (zh) * 2016-11-30 2018-11-20 广西玉柴机器股份有限公司 一种大型复杂形状的砂芯模具结构及脱模方法
CN107127294B (zh) * 2017-05-03 2019-04-12 苏州昀灏精密模具有限公司 可拆卸的铸造模具
DE202018107002U1 (de) * 2018-04-12 2019-03-14 Krämer + Grebe GmbH & Co. KG Modellbau Vorrichtung zur Herstellung von Kernen aus Formstoff
CN109926549A (zh) * 2019-05-06 2019-06-25 广西玉柴机器股份有限公司 一种柴油机气缸体铸造用制芯模具的顶芯机构
CN114101592B (zh) * 2021-11-08 2023-12-19 浙江信立智能设备有限公司 一种集自动制芯、接芯、修芯为一体的设备及其修芯方法
CN114210929B (zh) * 2021-12-17 2023-10-13 浙江省机电设计研究院有限公司 一种铁型覆砂铸造多组元铸型浇注时防窜气的结构及方法
CN114769513B (zh) * 2022-04-29 2023-10-17 昆山新三信机械模具有限公司 具备精密镶块配合结构的砂芯模具
CN115007812B (zh) * 2022-06-29 2023-09-26 溧阳市双盛机械制造有限公司 一种基于覆膜砂热芯铸件生产用制芯装置

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US1814185A (en) 1928-03-23 1931-07-14 Valley Mould & Iron Corp Core box for ingot molds
SU397271A1 (ru) 1970-12-22 1973-09-17 Металлорежущий станок
CH588315A5 (en) 1975-05-29 1977-05-31 Hitachi Metals Ltd Metal mould for mfr. of cores - with filler pieces attached to support plates to allow large moulds to be made with conventional machines
CN86202960U (zh) 1986-05-09 1988-07-27 鞍山钢铁公司 组合式钢板芯盒

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IT1196946B (it) * 1986-07-09 1988-11-25 Guido Peterle Dispositivo per il bloccaggio rapido delle casse d'anima sulle piastre di supporto di macchine formatrici di anime in terra da fonderia
US5368087A (en) * 1993-12-27 1994-11-29 Ford Motor Company Hot box core making apparatus
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US1814185A (en) 1928-03-23 1931-07-14 Valley Mould & Iron Corp Core box for ingot molds
SU397271A1 (ru) 1970-12-22 1973-09-17 Металлорежущий станок
CH588315A5 (en) 1975-05-29 1977-05-31 Hitachi Metals Ltd Metal mould for mfr. of cores - with filler pieces attached to support plates to allow large moulds to be made with conventional machines
CN86202960U (zh) 1986-05-09 1988-07-27 鞍山钢铁公司 组合式钢板芯盒

Also Published As

Publication number Publication date
DE102008058764A1 (de) 2010-05-20
US20100122790A1 (en) 2010-05-20
WO2010054809A3 (fr) 2010-07-22
EP2385883B1 (fr) 2014-12-31
DE102008058764B4 (de) 2011-08-25
EP2385883A2 (fr) 2011-11-16

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