EP0640418B2 - Herstellung von Gussstahlgegenständen mit inneren Hohlräumen - Google Patents

Herstellung von Gussstahlgegenständen mit inneren Hohlräumen Download PDF

Info

Publication number
EP0640418B2
EP0640418B2 EP93500118A EP93500118A EP0640418B2 EP 0640418 B2 EP0640418 B2 EP 0640418B2 EP 93500118 A EP93500118 A EP 93500118A EP 93500118 A EP93500118 A EP 93500118A EP 0640418 B2 EP0640418 B2 EP 0640418B2
Authority
EP
European Patent Office
Prior art keywords
parts
casting
production
projection
core
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
Application number
EP93500118A
Other languages
English (en)
French (fr)
Other versions
EP0640418A1 (de
EP0640418B1 (de
Inventor
José Lopez Almendros
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.)
Esco Corp
Original Assignee
Esco Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26134801&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0640418(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to ES09101593A priority Critical patent/ES2046078B1/es
Application filed by Esco Corp filed Critical Esco Corp
Priority to EP93500118A priority patent/EP0640418B2/de
Priority to DE1993623740 priority patent/DE69323740T3/de
Publication of EP0640418A1 publication Critical patent/EP0640418A1/de
Application granted granted Critical
Publication of EP0640418B1 publication Critical patent/EP0640418B1/de
Priority to GR990401342T priority patent/GR3030249T3/el
Publication of EP0640418B2 publication Critical patent/EP0640418B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks

Definitions

  • the present invention relates to improvements introduced in the production of cast steel parts provided with inner cavities, particularly concerning a mould assembly therefor, which permit substantial advantages to be obtained relative to the present state of the art.
  • the steel parts to be produced according to the present invention are preferably wear-resistant cast steel parts, in particular the teeth of excavators and other earth-moving machines, in which the part has a generally pointed structure with an inner cavity, which is open at one end of the part, thus permitting it to be connected to an acceptance or male part of the machine, and therefore enabling it to be replaced when it is worn.
  • the improvements which constitute the basis of the present invention are based substantially on the production of parts by means of a filling system using moulds comprising successive stacking of compartments or casting boxes, each of which has a set of parts supplied from a collector or central casting block, which facilitates successive filling of each of the levels of the mould formed by the various compartments, in association with specific means of designing the inner cavity of the part, in order to obtain controlled localisation of its recess, thus making it compatible with correct resistance of the part.
  • improved quality of the part is obtained by using moulds which are more highly resistant, thus enabling defects caused by inclusions of sand to be avoided, and providing improvements in the surface appearance of the product, as well as providing improved dimensional accuracy thereof.
  • An additional advantage consists of reducing the burr on the parts, thus reducing the finishing time necessary.
  • Another feature of the present improvements consists of the reduced consumption of sand for a specific quantity of steel cast, thus constituting an additional cost-reduction factor.
  • the present invention is based on the preparation of multiple boxes such as 1, 2, 3, 4, 5 and 6, with their corresponding cores, forming a mould assembly in which there are distributed multiple levels of individual parts as indicated by number 7 in Figure 1, of a variable number and arrangement, which in the example shown is radial, but which could be of another type, originating in a common axial filling duct 8, without any sinkheads whatsoever.
  • each of the individual components produced such as a tooth for an earth-moving machine, designated 15 in Figure 5, consists of a cast steel part provided with an inner cavity 16, which is open at the end connection surface 17 of the tooth, and which, according to the present invention, has a projection 18, which is constituted in a specific manner at the time of casting, in order to obtain localisation of the recess in an inner area of the tooth, preferably in an area which corresponds to the neutral line of the part, and in conditions of separation relative to the outer surface of the part, in order to avoid fragile areas.
  • the present invention also includes the optional arrangement of thickened parts such as 19, which are designed to provide a larger cross-section of the material in the area in which the inner recess will be provided.
  • the cross-section of the projection 20 will be variable according to the needs of each case, for example it can be circular, as shown in Figures 8 and 9, or it can be a truncated pyramid, as in the projection 22 in Figures 10 and 11, or it can be lobar, as in the projection 23 in Figures 12 and 13, which has a head 24 consisting of a series of projecting lobes, which may be pointed.
  • the projection can also be of the detachable type, as shown in Figure 14, in which the male part 25 has an aperture in which there is mounted the projection 26, which, in the case shown, is a lobar head 27.
  • the area of the projection, indicated 28 is disposed in a preferably neutral area of the part 29, such that the recess which is formed in this area 28 does not have any functional consequences on the finished part.
  • the communication with the atmosphere via the sand 30 of the core enables the pressures to be equalised in the recess area, thus avoiding local depressions, such as those which would occur in an inner recess without the control provided according to the present invention.
  • the nature of the projection 28 is such that it facilitates communication with the atmosphere, as previously described, without also facilitating the addition of heat and gases, by which means the recess formed is controlled.

Landscapes

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

Claims (2)

  1. Formanordnung zum Herstellen von Gussstahlteilen mit inneren Hohlräumen, bei der die Formen zu einem Stapel um einen gemeinsamen Füllkanal herum radial angeordnet sind, wobei jede Form einen Kern zur Herstellung von Teilen mit einem hohlen Ende aufweist und der Kern am äußeren Ende mit der Atmosphäre in Verbindung steht, dadurch gekennzeichnet, dass an demjenigen Kernende, das dem inneren Hohlraum jedes der zu formenden Teile entspricht, ein Vorsprung aus einem Werkstoff angeordnet ist, der beim Gießen Wärme und Gase erzeugen kann, um die Ausnehmung nach dem Gießen so zu kontrollieren, dass sie in einem von den Außenfächen des Gussstücks entfernten Bereich liegt, und dass die Formen so angeordnet sind, dass sie ohne Speiser aus dem gemeinsamen Füllkanal vollständig gefüllt werden.
  2. Formanordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Vorsprung des Kerns abnehmbar ist.
EP93500118A 1991-07-08 1993-08-02 Herstellung von Gussstahlgegenständen mit inneren Hohlräumen Expired - Lifetime EP0640418B2 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES09101593A ES2046078B1 (es) 1991-07-08 1991-07-08 Perfeccionamientos en la fabricacion de piezas moldeadas de acero, dotadas de cavidades interiores.
EP93500118A EP0640418B2 (de) 1991-07-08 1993-08-02 Herstellung von Gussstahlgegenständen mit inneren Hohlräumen
DE1993623740 DE69323740T3 (de) 1993-08-02 1993-08-02 Production of cast steel parts provided with inner cavities
GR990401342T GR3030249T3 (en) 1991-07-08 1999-05-19 Improvements in the production of cast steel parts provided with inner cavities.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES09101593A ES2046078B1 (es) 1991-07-08 1991-07-08 Perfeccionamientos en la fabricacion de piezas moldeadas de acero, dotadas de cavidades interiores.
EP93500118A EP0640418B2 (de) 1991-07-08 1993-08-02 Herstellung von Gussstahlgegenständen mit inneren Hohlräumen

Publications (3)

Publication Number Publication Date
EP0640418A1 EP0640418A1 (de) 1995-03-01
EP0640418B1 EP0640418B1 (de) 1999-03-03
EP0640418B2 true EP0640418B2 (de) 2004-12-01

Family

ID=26134801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93500118A Expired - Lifetime EP0640418B2 (de) 1991-07-08 1993-08-02 Herstellung von Gussstahlgegenständen mit inneren Hohlräumen

Country Status (3)

Country Link
EP (1) EP0640418B2 (de)
ES (1) ES2046078B1 (de)
GR (1) GR3030249T3 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09141391A (ja) * 1995-11-17 1997-06-03 Riken Kiyasutetsuku:Kk 積層鋳型
US5785107A (en) * 1995-12-29 1998-07-28 Georg Fischer Disa, Inc. Apparatus and method for producing multiple cores
US5787957A (en) * 1996-06-28 1998-08-04 Georg Fischer Disa, Inc. Apparatus and methods for injecting and gassing of sand
MX2007008956A (es) * 2007-07-25 2007-09-07 Enrique Alvarado Murillo Metodo y molde para moldeo estratificado con compensacion de presion metalostatica.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294209A (en) † 1918-01-22 1919-02-11 John B Walker Process for producing solid castings and their products.
US2205327A (en) † 1939-06-29 1940-06-18 Williams John Means for casting metals
JPS54110616A (en) † 1978-02-20 1979-08-30 Nippon Kokan Kk Method of forming panel zone portion
JPS5588953A (en) † 1978-12-26 1980-07-05 Honda Motor Co Ltd Shift fork casting device
JPS5588952A (en) † 1978-12-27 1980-07-05 Honda Motor Co Ltd Casting device of connecting rod
US4241492A (en) † 1978-12-21 1980-12-30 Wells Manufacturing Company Process for manufacture of valve seat
JPH0332446A (ja) † 1989-06-29 1991-02-13 Riken Corp 造型鋳型のスタツク装置及びそのスタツク法
SU1687360A1 (ru) † 1988-11-01 1991-10-30 Институт проблем литья АН УССР Литейна форма дл получени отливок зубьев ковша экскаватора из высокомарганцевой стали

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101046A (en) * 1937-07-01 1937-12-07 Renette Company Art of casting pistons
US3628598A (en) * 1968-10-23 1971-12-21 Modern Equipment Co Casting molds
US3981344A (en) * 1974-08-21 1976-09-21 United Technologies Corporation Investment casting mold and process

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1294209A (en) † 1918-01-22 1919-02-11 John B Walker Process for producing solid castings and their products.
US2205327A (en) † 1939-06-29 1940-06-18 Williams John Means for casting metals
JPS54110616A (en) † 1978-02-20 1979-08-30 Nippon Kokan Kk Method of forming panel zone portion
US4241492A (en) † 1978-12-21 1980-12-30 Wells Manufacturing Company Process for manufacture of valve seat
JPS5588953A (en) † 1978-12-26 1980-07-05 Honda Motor Co Ltd Shift fork casting device
JPS5588952A (en) † 1978-12-27 1980-07-05 Honda Motor Co Ltd Casting device of connecting rod
SU1687360A1 (ru) † 1988-11-01 1991-10-30 Институт проблем литья АН УССР Литейна форма дл получени отливок зубьев ковша экскаватора из высокомарганцевой стали
JPH0332446A (ja) † 1989-06-29 1991-02-13 Riken Corp 造型鋳型のスタツク装置及びそのスタツク法

Also Published As

Publication number Publication date
EP0640418A1 (de) 1995-03-01
GR3030249T3 (en) 1999-08-31
ES2046078R (de) 1995-03-16
ES2046078B1 (es) 1995-10-01
ES2046078A2 (es) 1994-01-16
EP0640418B1 (de) 1999-03-03

Similar Documents

Publication Publication Date Title
EP0431770B1 (de) Vollformgiessen eines Motorblockes aus zwei Legierungen
US7296615B2 (en) Method and apparatus for determining the location of core-generated features in an investment casting
CN110834067B (zh) 一种高温合金多孔座铸件浇注熔模及其熔模制作工艺方法
MXPA05002557A (es) Procedimiento de fundicion, particularmente para cabeza de cilindros de un motor.
CN106493306B (zh) 带有齿轮室盖的飞轮壳的铸造方法
KR100538284B1 (ko) 메탈중공주조물을제조하는캐스팅몰드및방법과그중공주조물
JPH09151786A (ja) 内燃機関用ピストンの製造方法
EP0640418B2 (de) Herstellung von Gussstahlgegenständen mit inneren Hohlräumen
CN109822047A (zh) 一种38w机体的铸造设计方法
EP0092690A1 (de) Formkern für das Giessen eines Motorzylinderblockes
CN209935807U (zh) 一种用于铸造发动机缸体的砂模
CN108941466A (zh) V型结构船用气缸体的铸造工艺方法
US5238216A (en) Apparatus for modifying thermal gradient for casting in graphite molds
US2820267A (en) Cylinder head coring
CN110369678A (zh) 一种风电主轴金属型及铸造系统
JP2000514898A (ja) 内燃機関のシリンダ・ヘッドの鋳造による製作のための方法および中子
CN210387460U (zh) 一种风电主轴金属型及铸造系统
CN101417326B (zh) 一种汽车制动鼓的铸造方法及模具
US2101046A (en) Art of casting pistons
CN108515145B (zh) 一种基于静压铸造半轴的工艺
CN207086851U (zh) 一种齿形覆膜砂芯及制作该砂芯的模具
CN215746346U (zh) 压铸壳体的模具
JPH05146866A (ja) 中空チルドカムシヤフトおよびその製造方法
Jolly et al. Use of simulation tools in the practical development of a method for manufacture of cast iron camshafts
CN218460786U (zh) 一种蠕墨铸铁气缸盖浇注系统

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19940301

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB GR IE IT PT

17Q First examination report despatched

Effective date: 19960425

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB GR IE IT PT

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69323740

Country of ref document: DE

Date of ref document: 19990408

ET Fr: translation filed
REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19990514

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: ESCO CORPORATION

Effective date: 19991202

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

RTI2 Title (correction)

Free format text: PRODUCTION OF CAST STEEL PARTS PROVIDED WITH INNER CAVITIES

RTI2 Title (correction)

Free format text: PRODUCTION OF CAST STEEL PARTS PROVIDED WITH INNER CAVITIES

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ESCO CORPORATION

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

27A Patent maintained in amended form

Effective date: 20041201

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): BE DE FR GB GR IE IT PT

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20050400653

Country of ref document: GR

REG Reference to a national code

Ref country code: PT

Ref legal event code: PC4A

Free format text: ESCO CORPORATION US

Effective date: 20050301

ET3 Fr: translation filed ** decision concerning opposition
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20080722

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20080828

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080930

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20080827

Year of fee payment: 16

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20100202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100202

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090803

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100303

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120828

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20120830

Year of fee payment: 20

Ref country code: IT

Payment date: 20120823

Year of fee payment: 20

Ref country code: BE

Payment date: 20120827

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20130801

BE20 Be: patent expired

Owner name: *ESCO CORP.

Effective date: 20130802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130801