EP0164731B1 - A method for the production of mould parts - Google Patents

A method for the production of mould parts Download PDF

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Publication number
EP0164731B1
EP0164731B1 EP85107199A EP85107199A EP0164731B1 EP 0164731 B1 EP0164731 B1 EP 0164731B1 EP 85107199 A EP85107199 A EP 85107199A EP 85107199 A EP85107199 A EP 85107199A EP 0164731 B1 EP0164731 B1 EP 0164731B1
Authority
EP
European Patent Office
Prior art keywords
mould
pressure
funnel
plates
accordance
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
EP85107199A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0164731A1 (en
Inventor
Aage Berg Larsen
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.)
Dansk Industri Syndikat AS
Original Assignee
Dansk Industri Syndikat AS
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 Dansk Industri Syndikat AS filed Critical Dansk Industri Syndikat AS
Publication of EP0164731A1 publication Critical patent/EP0164731A1/en
Application granted granted Critical
Publication of EP0164731B1 publication Critical patent/EP0164731B1/en
Expired legal-status Critical Current

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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
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
    • 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

  • the present invention relates to a method for the production of mould parts by an automatic mould part producing apparatus comprising a mould chamber having pressure plates movable towards one another and mould plates fastened to said pressure plates, and a container for holding a supply of mould material, said container being disposed above said mould chamber and communicating therewith via a funnel-shaped inlet, wherein a pressurised gas is introduced into said container above said supply of material for inserting said material via said funnel-shaped inlet into said mould chamber, and wherein further pressurised gas is used to fluidise the material in the throat region of said funnel-shaped inlet.
  • a method of this kind is known from EP-A-72 254 and from BE-A-510 689.
  • the pressurised gas used to fluidise the material in the throat region of the funnel-shaped inlet takes the form of pulsating blasts of air.
  • the fluidisation of the sand reduces potential blockage in the throat region and is intended to ensure better filling of the mould chamber.
  • the space within the container above the supply of material is supplied with pressurised gas for inserting the material into the mould chamber, and the valve for supplying the compressed air remains open during squeezing together of the mould plates so that compressed air continues to flow into the charging chamber, preventing sand from backing up into the chamber during the squeezing step.
  • a gate valve is used to separate the container from the mould chamber and, while the two are separated, the sand in the container is fluidised and pressurised from above. The gate is then rapidly opened so that the mould chamber is explosively charged with sand.
  • FR-A-1 049 962 which also discloses a sand container which is pressurised from above to discharge the sand through the funnel-shaped outlet. To facilitate the movement of the sand, and to prevent the formation of bridges, further pressurised gas is directed along the walls of the container. It is however understood that this specification is not concerned with a mould chamber filling apparatus per se but instead with a reservoir which serves to charge a container, with the mould chamber then being filled from the container.
  • a preferred embodiment of the method is characterised by the further step of connecting a vacuum source via a suction passage to selected shadow areas of at least one of the mould plates in said mould chamber behind projecting ribs and the like. In this way a further reduction of the cycle time and improved filling of the critical "shadow areas" in the mould cavity is achieved.
  • a method is admittedly described in DE-B-1 941 736 in which the mould chamber is subjected to a vacuum during the insertion of sand, however the vacuum is provided solely to increase the effective pressure difference between the mould cavity and the space above the supply by connecting the mould cavity with the vacuum source through a relatively wide slot in the bottom of the mould chamber. There is no provision made for applying the vacuum through apertures spaced in the surface of the mould chamber at critical positions such as the shadow areas.
  • a pressure source is connected to said suction passage in place of said vacuum source for stripping of the mould part.
  • a container 1 is used for storage of the mould sand 2, which, as the name indicates, normally is sand, but it is possible also to use other suitable mould materials.
  • the mould sand 2 which, as the name indicates, normally is sand, but it is possible also to use other suitable mould materials.
  • air channels 3 at the sidewalls of the container pressure air is injected into the space above the sand 2.
  • a fluidisation of the sand is provided at the funnel-shaped inlet 4 of the container, air being supplied under high pressure through the supply ducts 5, and by this, air pockets and a fluidisation are provided immediately above the inlet 4, as indicated by the arrows and the dotted lines.
  • the pressurised air is supplied from a pressure air container 6 which is provided with pressurised air from a compressor through a valve 7.
  • a mould chamber 8 Under the container 1, a mould chamber 8 is provided which is limited in the lateral direction by mould plates 9 and 10.
  • the mould plates are supported by pressure plates 11 and 12 respectively which by means of a piston system 13 (only one piston is shown) is arranged so that they can be led towards each other under high pressure.
  • passage apertures 14 are designed which via supply lines and a three-way valve 15 can be connected to a vacuum source 16 and a pressure source 17 respectively.
  • mould insertion has just been initiated, and the sand 2 is forced from the funnel-shaped inlet 4 under high pressure into the mould chamber 8 by pressure injection through a porous plate at the bottom of the funnel, such as it is indicated by the arrows.
  • the insertion of the sand and the compression in the mould chamber 8 is furthered by providing vacuum from the vacuum source 16.
  • a controlled pressure is furthermore established over the sand, and the lower pressure injection serves for fluidisation of the funnel area.
  • the mould plates 9 and 10 are led towards each other, activated by a working cylinder, not shown, which drive -the pressure plates 11 and 12 towards each other by means of pistons 13.
  • Removal of the mould plate 10 is made by moving the non-illustrated piston and the pressure plate 12 from the mould in the programmed way, simultaneously supplying pressurised air from the pressure air source 17 through the passage apertures 14, so that a positive pressure against the mould limiting surfaces is provided.
  • the mould 8 is removed from the mould chamber by means of the illustrated piston 13 and the pressure plate 11 and pushed forward to be put together with the previously produced moulds in a manner known per se.
  • the mould plate 9 is stripped by moving the piston 13 and the pressure plate 11 away from the mould last produced in a programmed way, by simultaneously injecting pressure air from the source 17 through the apertures 14.
  • the piston 13 and the pressure plate 11 turn back to their starting positions in the mould chamber.
  • the pressure plate 12 is moved back to starting position by means of the non-illustrated piston. Now, a new mould insertion can begin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Pens And Brushes (AREA)
EP85107199A 1984-06-15 1985-06-11 A method for the production of mould parts Expired EP0164731B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK294584A DK294584D0 (da) 1984-06-15 1984-06-15 Fremgangsmaade til fremstilling af formparter
DK2945/84 1984-06-15

Publications (2)

Publication Number Publication Date
EP0164731A1 EP0164731A1 (en) 1985-12-18
EP0164731B1 true EP0164731B1 (en) 1988-03-23

Family

ID=8117434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107199A Expired EP0164731B1 (en) 1984-06-15 1985-06-11 A method for the production of mould parts

Country Status (10)

Country Link
EP (1) EP0164731B1 (enrdf_load_stackoverflow)
JP (1) JPS6182950A (enrdf_load_stackoverflow)
CA (1) CA1266362A (enrdf_load_stackoverflow)
DD (1) DD238745A5 (enrdf_load_stackoverflow)
DE (1) DE3561929D1 (enrdf_load_stackoverflow)
DK (1) DK294584D0 (enrdf_load_stackoverflow)
ES (1) ES8607774A1 (enrdf_load_stackoverflow)
PL (1) PL144177B1 (enrdf_load_stackoverflow)
SU (1) SU1757447A3 (enrdf_load_stackoverflow)
ZA (1) ZA854335B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745093B4 (de) * 1997-10-11 2007-03-01 Hydro Aluminium Alucast Gmbh Vorrichtung zum Herstellen von Gießformen oder Gießformteilen

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1780917C (ru) * 1989-06-29 1992-12-15 Научно-Производственное Объединение Технологии Автомобильной Промышленности Способ изготовлени разовых литейных форм и устройство дл его осуществлени
CH689634A5 (fr) * 1990-03-20 1999-07-30 Dansk Ind Syndikat Procédé pour produire une série de moules ou de parties de moules de fonderie et un appareil pour mettre en oeuvre le procédé.
DK169203B1 (da) * 1993-07-01 1994-09-12 Dansk Ind Syndikat Fremgangsmåde og apparat til fremstilling af støbeforme eller -formdele ved indblæsning af partikelmateriale i et formkammer
AU2000222795A1 (en) * 2000-02-04 2001-08-14 Georg Fischer Disa A/S Method and apparatus for producing casting moulds or mould parts
WO2001060549A1 (fr) * 2000-02-17 2001-08-23 Sintokogio, Ltd. Procede et dispositif de remplissage avec du sable de moulage
JP3878909B2 (ja) * 2001-02-07 2007-02-07 ディサ インダストリーズ アクツイエセルスカプ 改良された砂吹き込みを持つ砂造型機
KR101223285B1 (ko) * 2010-11-02 2013-01-16 최경화 원격조종 안전 삼각대
CN105216197A (zh) * 2015-10-20 2016-01-06 重庆跃发日用品有限公司 一种塑料模压料的掺混送料方法
CN106623813A (zh) * 2016-12-28 2017-05-10 池州恒和精密机械有限公司 一种空心铸件的砂型加工装置
WO2023211317A1 (ru) * 2022-04-29 2023-11-02 Общество с ограниченной ответственностью "АВП Инновации" Способ аддитивного изготовления изделий сложной формы

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE510689A (enrdf_load_stackoverflow) * 1950-06-12 1952-04-30
EP0072254A1 (en) * 1981-08-11 1983-02-16 Dependable-Fordath Inc. Moulding apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1475935A (en) * 1922-10-02 1923-12-04 Tabor Mfg Co Method and apparatus for forming sand molds
BE508903A (enrdf_load_stackoverflow) * 1951-02-09
DE1941736B1 (de) * 1968-08-19 1971-07-29 Buehler Eugen Verfahren bei kastenlosen Formmaschinen zum Einschiessen des Formsandes und Maschine zur Durchfuehrung desselben
DE2609274A1 (de) * 1976-03-05 1977-09-08 Buehler Eugen Verfahren zur pneumatischen sandverdichtung bei der herstellung von sandformen oder -kernen
JPS5314647U (enrdf_load_stackoverflow) * 1976-07-16 1978-02-07
JPS57171545A (en) * 1981-04-13 1982-10-22 Sintokogio Ltd Molding device for hollow core
JPS5877741A (ja) * 1981-10-31 1983-05-11 Sintokogio Ltd 鋳型造型方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE510689A (enrdf_load_stackoverflow) * 1950-06-12 1952-04-30
EP0072254A1 (en) * 1981-08-11 1983-02-16 Dependable-Fordath Inc. Moulding apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745093B4 (de) * 1997-10-11 2007-03-01 Hydro Aluminium Alucast Gmbh Vorrichtung zum Herstellen von Gießformen oder Gießformteilen

Also Published As

Publication number Publication date
ES8607774A1 (es) 1986-06-01
ES544190A0 (es) 1986-06-01
DK294584D0 (da) 1984-06-15
SU1757447A3 (ru) 1992-08-23
PL253954A1 (en) 1986-04-22
PL144177B1 (en) 1988-04-30
CA1266362A (en) 1990-03-06
EP0164731A1 (en) 1985-12-18
JPH0261868B2 (enrdf_load_stackoverflow) 1990-12-21
DE3561929D1 (en) 1988-04-28
ZA854335B (en) 1986-01-29
JPS6182950A (ja) 1986-04-26
DD238745A5 (de) 1986-09-03

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