EP0123756B1 - Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes - Google Patents

Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes Download PDF

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Publication number
EP0123756B1
EP0123756B1 EP19830420073 EP83420073A EP0123756B1 EP 0123756 B1 EP0123756 B1 EP 0123756B1 EP 19830420073 EP19830420073 EP 19830420073 EP 83420073 A EP83420073 A EP 83420073A EP 0123756 B1 EP0123756 B1 EP 0123756B1
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EP
European Patent Office
Prior art keywords
core
molding
machine
box
drag
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
Application number
EP19830420073
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English (en)
French (fr)
Other versions
EP0123756A1 (de
Inventor
Kazuo Kawai
Sumikazu Kawai
Seiji Katashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANIWA PRODUCTS CO Ltd
Original Assignee
NANIWA PRODUCTS CO Ltd
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 NANIWA PRODUCTS CO Ltd filed Critical NANIWA PRODUCTS CO Ltd
Priority to EP19830420073 priority Critical patent/EP0123756B1/de
Priority to DE8383420073T priority patent/DE3372080D1/de
Publication of EP0123756A1 publication Critical patent/EP0123756A1/de
Application granted granted Critical
Publication of EP0123756B1 publication Critical patent/EP0123756B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/12—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose for filling flasks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores

Definitions

  • This invention relates to cold box type machine for molding an integral connecting core, and by "integral connecting core” referred to in this invention is meant a completed core in which some parts of a core of complicated shape or structure are separately molded, the molded core (connecting core) parts are arranged previously in core box, and then a molding material is filled in the mold cavities whereby the molded core parts are connected in integrity by means of the molding material.
  • cores of complicated shape or structure i.e. cores whose molding is difficult with a single molding operation are manufactured in such a way that some parts of a core are separately, previously molded, said parts are manually arranged in a core box for molding a complete core, and thereafter the complete core is molded.
  • cores of complicated shape or structure i.e. cores whose molding is difficult with a single molding operation are manufactured in such a way that some parts of a core are separately, previously molded, said parts are manually arranged in a core box for molding a complete core, and thereafter the complete core is molded.
  • such conventional system troubles the worker so that the molding cycle is not constant and the work is accompanied by danger, and it is known to the skilled in the art that such molding is of bad efficiency.
  • the inventors of this invention have carried out lots of studies and experiments to improve said conventional system, and as a result they have been able to successfully develop the present invention.
  • the present invention provides a cold box type machine for molding an integral connecting core, which machine is provided with a sand blowing mechanism and a gassing mechanism, said mechanisms being suspended above an upper frame of the molding machine and traversable, and with a liftable drag car being mounted on the platform of the molding machine, characterized in that in a machine of an entirely automatic mode a rotatable connecting core feeding means is provided at one side portion outside said molding machine, a reversing unloader is provided at the other side portion, and a connecting core transfer car having a connecting core lifting means is traversably suspended from said upper frame in parallel with said sand blowing mechanism and said gassing mechanism.
  • the present invention provides a connecting core feeding means for the molding machine of integral connecting cores, in which there are provided two rotatable feeding means in parallel on a rotary table, said means having an underframe, a number of connecting core holders are disengageably mounted in endless traverse chains provided on said underframe, a traverse, from which the introductory portions of the independent claims are derived, cylinder for said traverse chains and a hook cylinder are disposed within said underframe, and a traverse cylinder for said. feeding means is provided upon the rotary table.
  • DE B-814715 discloses a split core box which is divided in a drag core box and a cope core box.
  • the present invention provides split core boxes for the molding machine of integral connecting cores; in this machine said drag core box has cavities for inserting the connecting cores and said cope core box has fixed mandrels at its lower surface and a lot of blow parts, said drag core box consisting of a fixed pattern provided on the drag core box base, a pair of vise patterns which slide and engage with each other, a pair of loose pieces which slide rectangularly crossing the sliding direction of said vise patterns, and at least one mandrel which pierces through said drag core box base and slides.
  • the reference numeral 9 designates a blow head car which is suspended from an upper frame 21 of the molding machine frame and which traverses on rails by the actuation of a traverse cylinder 12 for blow head, said blow head car 9 being provided usually with a blow head 10 and a gassing head 11 as shown.
  • Reference 5 is a drag car whose mechanism is such that it places a drag core box 22 thereon, it vertically moves by a lifting means 7 for drag car mounted on the machine platform, it is provided with a core ejecting cylindre 15, and it can traverse by the operation of a traverse cylinder for drag car.
  • Reference 23 is a cope core box disengageably arranged in the machine frame as already known.
  • a press cylinder having a blow valve 19, a sand mixer 24, a sand heater, and other necessary equipment.
  • Numeral 1 indicates a connecting core lifting means, and said means is constructed in such a way that as shown in Fig. 2 it is suspended from a connecting core transfer car 2 which moves on the rails disposed in parallel in front of the upper frame 21, it vertically moves by the cylinder not shown, it grasps a connecting core 25 set in a connecting core feeding means 17, by the operation of a chucking cylinder for connecting core, and then it travels onto a drag core box 22 by the actuation of a cylinder 4 for transfer car thereby to fit the connecting core 25 into the predetermined position at the molding cavity of said drag core box.
  • Reference 14 shows a reversing unloader, and it functions in such manner that its chucking portion carries out a reciprocal movement being actuated by a rotary actuator 20 between the surface of said drag core box 22 and a conveyor 26 for blown core, to allow the completed core to be placed on said conveyor 26.
  • reference 18 designates a blow plate
  • reference (F) a rotating center of feeding means numeral 27 a core box exchanging car
  • numeral 28 a blow plate exchanging mechanism
  • numeral 29 a core box exchanging cylinder
  • a number of previously molded connecting cores 25 are set, as shown, in the connecting core feeding means 17.
  • the connecting core lifting means 1 is lowered thereby to retain a connecting core 25 at the position of said connecting core chucking center (E) by means of the connecting core chucking cylinders 3. Said connecting core lifting means 1 is lifted while retaining the connecting core 25. Then the connecting core transfer car 2 is moved, while retaining the connecting core 25, to the machine center (A) by the actuation of the cylinder 4 for transfer car. Said connecting core lifting means 1 is adjusted in such a way that it stops at each of the connecting core chucking center (E) and the machine center (A). Simultaneously with the stopping of the connecting core lifting means 1 at the machine center (A) the internally stored cylinder operates to insert the connecting core 25 into the predetermined position of the drag core box 22.
  • the connecting core 25 is released from its being held by the connecting core chucking cylinders, when said connecting core lifting means 1 is raised and said connecting core transfer car 2 is moved for returning to the connecting core chucking center (E). Additionally, the drag car 5 in Fig. 5 is located at the blowing side center (B), but when said connecting core 25 is inserted into the drag core box 22 said drag car 5 may be located in the takeout center (C).
  • the drag car 5 is transferred from the take-out center (C) to the blowing side center (B) by means of the transfer cylinder 6 for drag car.
  • the rod end of the transfer cylinder 6 is fixed to a terminal car 8 which is connected to said drag car 5 by hook.
  • the drag car 5 positioned at the blowing side center (B) is lifted by a lifting means 7 for drag car to allow the drag core box 22 to be brought into close contact with the cope core box 23.
  • the hook-connecting portion of the terminal car 8 with the drag car 5 is of sliding mechanism, and the terminal car does not lift up.
  • the blow head car 9 is moved by said cylinder 12, and a gassing head 11 is moved into the machine center (A) to stop thereon.
  • the blow head 10 lies on the sand feeding center (D) when sand is fed into said blow head from a hopper.
  • the gassing head 11 located on the machine center (A) is lowered to be in close contact with the rear surface of the cope core box 23 by the press cylinder 13, and then ejecting-shaping pins (not shown) stored in the gassing head 11 are lowered whereby the molding sand remaining at the blow port of said cope core box 23 is shaped for the surface of the core.
  • the sand filled in the core box cavity is hardened by blowing a gas for hardening or a reacting gas supplied from a gas generating device (not shown) thereby making a complete core connected in integrity with the connecting core 25 previously inserted.
  • the gas for hardening is discharged after the finishing of said hardening reaction, while the gassing head 11 is raised for returning.
  • the lifting means 7 for drag car is actuated, and the drag car 5 retaining the molded integral connecting core is lowered and stops at the predetermined position.
  • the reversing unloader 14 is reversed 90° toward the core box side from the neutral position shown in Fig. 1 by a rotary actuator 20, and the drag'core box 5 is transferred from the blowing side center (B) to the take-out center (C) by the traverse cylinder 6 for drag car so that it may stop at the center (C). Further, a core ejecting cylinder 15 provided in the drag car 5 is actuated, and ejector pins (not shown) are projected into the drag core box 22 so that the integral connecting core may be pressed up into the frame of said previously reversed unloader 14 thereby to be released.
  • the molded integral connecting core pressed up into the frame of the reversing unloader 14 is tightly held by the chucking cylinder 16 for unloader, said unloader 14 is reversed 180° to come onto a conveyor 26 for blown core, said chucking cylinder 16 is opened, and the integral connecting core is placed upon the conveyor 26 for the molded core to be permitted for carrying out.
  • the reversing unloader 14 is reversed by 90° to be returned to the neutral position, and at the same time the core ejecting cylinder 15 within the drag core box 5 is returned to be shifted to the subsequent cycle.
  • numeral 30 represents a rotary table rotated by a rotary cylinder 34 and its rotating mode is as shown in Fig. 8.
  • Numeral 17 is a feeding means which is constructed in such manner that it may travel onto and stop at rails 31 arranged in said rotary table 34 and it may be loaded with two feeding means 17, i.e. connecting core taking-out side (P) feeding means 17 and setting side (S) feeding means 17.
  • Reference 42 designates underframes, on the upper surface each of which the following members are organically provided.
  • Two chains 33 are bridged over four wheels 43 disposed at both the sides of said underframes 42 by suitable means, and a plurality of core holders 32 are disengageably anchored to said chains 33, said holders being constructed to hold connecting cores 25.
  • a chain traverse cylinder 41 for said chains 33 in the present machine there are arranged a chain traverse cylinder 41 for said chains 33, a frame 38 fixed to the piston rod of said traverse cylinder 41, guide bars 37 for sliding said frame 38, two hooks 39, a cylinder 40 for opening or closing the hooks, etc.
  • the two feeding means 17 are arranged in such manner that they can move on the rails 31 on the rotary table 1, each of said means 17 is connected by two chains 33 to a holder 32 of a connecting core 25, and said connecting core is obtained at the core holder 32 or fitted thereat at the connecting core.
  • setting side (S) (the left side feeding means) in Fig. 4.
  • the connecting core 25 thus transferred inserts, into the fixed position within the drag core box, two (not limited) connecting cores 25 at a in the core box inserting position (E) by the chucking device 3 at the machine side whereby a core is completed through an integral connecting molding.
  • connecting cores 25 at the positions c are transferred to the core box inserting position (E) by another traverse cylinder 36 shown in Fig. 6 thereby to be inserted into the core box of the machine.
  • connecting cores 25 no longer exist in the first row the connecting cores 25 in the second row are shifted to the core box inserting position.
  • the traverse cylinders 35, 36 shown in Fig. 7 are returned, when core holders 32 are retracted (toward the left in Fig. 6) by said traverse cylinder 41 by releasing the chucked hooks 39 provided in the frame 38 where the guide bars 37 slide as shown in Fig. 6 by a hook switching cylinder 40, secondly the core holders 32 in the second row are chucked by the hooks 39, thereby to be advanced by the traverse cylinder 41, and thirdly the connecting cores 25 at the second row are transferred in the core box inserting position, so as to continuously supply the connecting cores 25 to the fixed position. Additionally it is possible to continuously operate the connecting molding by arranging connecting cores 25 in the core holders 32 in other feeding means during the operation at the taking-out side (P).
  • the machine of this invention is constructed and operated as described above, and the machine can be continuously operated for a great many cycles by setting a plurality of connecting cores onto the core holders at the setting side (S) (the right in Fig. 1) during which the operator can do other work (such as handling or molding with several machines).
  • the worker manually inserts a connecting core into core box for each cycle, and therefore it is impossible to continuously mold with a single machine. Moreover, due to less time for doing other work the worker is unable to handle several molding machines. Additionally, in case the worker inserts connecting cores by hand a part of his body enters in core box so that it is likely that a danger occurs by erroneous operation.
  • the drag core box of the split core boxes of this invention is constructed as follows:
  • References 45a, 45b are a pair of loose pieces whose mechanism is such that by the operation of loose piece actuating cylinders 50a, 50b they slide within said vise patterns 44a, 44b and in rectangular crossing with the sliding direction of said vise patterns.
  • Reference 46 designates mandrels whose mechanism is such that by the operation of mandrel actuating cylinders 48 provided in the die base 2 they pass through said base 52 and slide along the outer slants of said fixed pattern 47.
  • Reference 53 shows a mounting frame for drag.
  • the lower surface of the cope core box 23 is equipped with fixed mandrels 23a and a number of blow ports 56.
  • split core boxes for the invention are constituted as described above, and the mode of molding operation in case they are set in the machine will be explained in order.
  • the previously molded, connecting cores 25 delivered by said feeding means are laid for fixation on the top ofthefixed pattern 47, on which top is mounted a core locating pin 55. Then by actuating the cylinders 49a, 49b, the vise patterns 44a, 44b are closed to constitute the outer side surface of a complete integral connecting core. As shown in Fig. 13, the connecting cores 25 are of construction where two cores are bonded together, and the core locating wedges 54a, 54b which will fit the bonding voids are provided in the inner surface of the vise patterns 44a, 44b so as to position the connecting cores 25 more accurately.
  • Fig. 13 shows a cross section of an integrally connected core, and preferably at least a part of the outer surface of each of said connecting cores 25, namely the outer periphery through which the blowing, molding material passes, is shaped roundish as shown with R to form an integral body.
  • the loose pieces 45a, 45b are closed by the cylinders 50a, 50b thereby constituting the side and end surfaces of a complete, integral connecting core.
  • the mandrels 46 lift by the cylinders 48 to enter the predetermined positions i.e. into the cylinder bores of a completed core for the engine block as shown.
  • the thus assemblied drag core box is lifted by lifting means (not shown) to be pressed against the cope core box 23.
  • the connecting cores 25 are prevented from moving when blowing or slipping of lined faces by the core locating chocks 57 provided at the side faces of said fixed mandrels 23a mounted at the lower surface of the cope core box 23.
  • the split core boxes are assembled by the above operations, when desired molding voids are completely constituted.
  • the molding machine of this invention is equipped with a core box exchanging car 27 and a blow plate exchanging mechanism 28 as shown in Figs. 1 and 2, besides the above constitutional features.
  • Said car 27 and said mechanism 28 are outlined as follows:
  • the core box exchanging car 27 is arranged as shown in Figs. 2 and 3, and it is constructed in such a way that it supports the cope core box 23 dismantled from the machine frame, by raising the drag car 5, then said car 5 is lowered to a predetermined position (as shown in Fig. 2), and thereafter by actuating the traverse cylinder 6 for said drag car 5 loading the cope core box 23 is shifted to the take-out center (C) to release the hooks and to be loaded on the core box exchanging car 27 by said core box exchanging cylinder 29, and a separated drag car 5 is reversely operated for setting.
  • blow plate is also exchanged.
  • the machine is of such mechanism that in such case the blow head 10 is positioned right above the blow plate exchanging mechanism 28 by actuating the traverse cylinder 12 for blow head, said exchanging mechanism 28 is lifted to receive the blow plate released from the blow head 10, said exchanging mechanism 28 is then horizontally turned for exchanging with a new blow plate, and the blow plate is mounted to the blow head 10 by the operation reverse to the above.
  • the molding machine of this invention is constructed and operated as described above, and the functions and effects produced therefrom may be mentioned as follows:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Claims (9)

1. "Cold-box" Maschine für das Formen eines integrierten Verbundkernes, die mit einem Sandblasmechanismus und mit einem Gasblasmechanismus versehen ist, die beide von einem oberen Rahmen (21) der Formmaschine getragen werden, der verschwenkbar ist und die einen anhebbaren Mitnehmerwagen (5) aufweist, der auf der Arbeitsplatte der Formmaschine angeordnet ist, dadurch gekennzeichnet, daß bei einer Maschine vom vollautomatischen Typ eine rotierende Verbundkernzufuhranordnung (17) an einem Seitenabschnitt außerhalb der Formmaschine vorgesehen ist, eine umkehrbare Abladeanordnung (14) am anderen Seitenabschnitt vorgesehen ist und ein Verbundkerntransportwagen (2) mit einer Verbundkernhebevorrichtung (1) veschwenkbar am oberen Rahmen (21) parallel zum Sandblas- und Gasblasmechanismus aufgehängt ist.
2. Vollautomatische "Cold-box" Maschine für das Formen eines integrierten Verbundkerns nach Anspruch 1, bei der oberhalb des oberen Rahmens (21) des Maschinenrahmens eine Sandzufuhranordnung und eine Mischanordnung (24) für das Formmaterial vorgesehen sind.
3. Vollautomatische "Cold-box" Maschine für das Formen eines integrierten Verbundkernes nach Anspruch 1, wobei die Maschine zusätzlich mit einer Anordnung versehen ist zum schnellen Anordnen oder Abnehmen des Kernkastens (23) und Blasplatte (18).
4. Verbundkernzufuhranordnung in einer "Cold-box" Maschine für das Formen eines integrierten Verbundkerns, dadurch gekennzeichnet, daß in einer vollautomatischen Maschine zwei rotierbare Zufuhranordnungen parallel auf einem Drehtisch (30) vorgesehen sind, wobei diese Anordnungen einen unteren Rahmen (42) aufweisen, eine Anzahl von Verbundkernhaltern (32), die lösbar in Endlosförderketen (33) angeordnet sind, welche auf dem unteren Rahmen (42) vorgesehen sind, während ein Querzylinder (41) für die Förderketten (33) und ein Greifzylinder (40) innerhalb des unteren Rahmens (42) angeordnet sind und ein Querzylinder (35, 36) für die Zufuhranordnungen auf dem Drehtisch (30) vorgesehen ist.
5. Geteilte Kernkästen in einer "Cold-box" Maschine für das Formen eines integrierten Verbundkernes, wobei die Kästen aus der Kombination eines Unterkastens (22) und eines Oberkastens (23) bestehen, dadurch gekennzeichnet, daß in einer vollautomatischen Maschine der Unterkasten (22) Aussparungen zum Einsetzen der Verbundkern (25) aufweist und der Oberkasten (23) feststehende Vorsprünge (23a) an seiner unteren Oberfläche aufweist sowie eine Vielzahl von Blasöffnungen, wobei der Unterkasten ein feststehendes Muster (47) auf dem Unterkastengrundteil (52) aufweist, ein Paar Klemmstücke (44a, 44b) aufweist, die gleitbar und ineinander eingreifbar sind, ein Paar loser Teile (45a, 45b), die rechtwinklig gleitbar sind bezüglich der Gleitrichtung der Klemmstücke (44a, 44b) und wenigstens einen gleitbaren Dorn (46), der das Unterkastengrundteil (52) durchsetzt.
6. Geteilte Kernkästen für einen integrierten Verbundkern nach Anspruch 5, bei denen an der inneren Wandfläche der Klemmstücke (44a, 44b) Kernhaltekanten (54a, 54b) vorgesehen sind, die in die Aussparungen eines aus zwei Verbundkernen aufgebauten Kerns eingreifen.
7. Geteilte Kernkästen für einen integrierten Verbundkern nach Anspruch 5, bei denen die Kernhaltekanten (55) am Oberteil des feststehenden Musters (47) vorgesehen sind.
8. Kernkästen für einen integrierten Verbundkern zur Verwendung in einer "Cold-box" Maschine nach Anspruch 5, bei dem der Zusammenbau aus dem Unterkasten und dem Oberkasten derart ausgestaltet ist, daß er auf einem geschlossenen Kasten geöffnet oder geschlossen wird.
9. Geteilte Kernkästen für einen integrierten Verbundkern nach Anspruch 5, bei denen wenigstens ein Teil der äußeren Fläche der Verbundkerne so geformt ist, daß die Fluidität des Formmaterials nicht beeinträchtigt ist.
EP19830420073 1983-04-27 1983-04-27 Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes Expired EP0123756B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19830420073 EP0123756B1 (de) 1983-04-27 1983-04-27 Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes
DE8383420073T DE3372080D1 (en) 1983-04-27 1983-04-27 Entirely automatic, cold box type machine for molding an integral connecting core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830420073 EP0123756B1 (de) 1983-04-27 1983-04-27 Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes

Publications (2)

Publication Number Publication Date
EP0123756A1 EP0123756A1 (de) 1984-11-07
EP0123756B1 true EP0123756B1 (de) 1987-06-16

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EP19830420073 Expired EP0123756B1 (de) 1983-04-27 1983-04-27 Vollautomatische "cold box" Maschine für das Formen eines integrierten Verbundkernes

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594363B1 (fr) * 1986-02-19 1988-06-17 Kuhn Sa Machine a trier des noyaux de fonderie
DE4334857C1 (de) * 1993-10-13 1994-10-13 Hottinger Adolf Masch Vorrichtung zum Kernpaketieren
EP0774311A1 (de) * 1995-11-17 1997-05-21 Sintokogio, Ltd. Vorrichtung und Verfahren zur Herstellung eines Kernes
DE10251418B3 (de) * 2002-11-02 2004-02-26 Laempe + Gies Gmbh Verfahren und Vorrichtung zur Herstellung von Formen oder Kernen insbesondere für Gießereizwecke
CN114054669A (zh) * 2021-10-12 2022-02-18 北京机科国创轻量化科学研究院有限公司 一种自适应砂型自动清理装置
CN114406206B (zh) * 2022-02-10 2023-07-21 苏州明志科技股份有限公司 紧凑型射芯机
CN115625300B (zh) * 2022-09-06 2023-06-06 安徽速诚智能科技有限公司 一种利用正负压快速成型的环保型制芯机

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US4083396A (en) * 1977-04-05 1978-04-11 Ashland Oil, Inc. Rotary type core-making machine
US4190097A (en) * 1977-11-23 1980-02-26 Grede Foundries Inc. Apparatus for making foundry cores
US4184533A (en) * 1978-05-30 1980-01-22 Esco Corporation Machine for shaping sand into cores or molds
GB2024070B (en) * 1978-06-27 1982-08-25 Int Minerals & Chem Corp Convertible sand core machine

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EP0123756A1 (de) 1984-11-07
DE3372080D1 (en) 1987-07-23

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