EP0704260B1 - Core blowing machine for forming shell-molding cores - Google Patents

Core blowing machine for forming shell-molding cores Download PDF

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Publication number
EP0704260B1
EP0704260B1 EP19950109357 EP95109357A EP0704260B1 EP 0704260 B1 EP0704260 B1 EP 0704260B1 EP 19950109357 EP19950109357 EP 19950109357 EP 95109357 A EP95109357 A EP 95109357A EP 0704260 B1 EP0704260 B1 EP 0704260B1
Authority
EP
European Patent Office
Prior art keywords
core
blowing machine
machine according
boxes
blowing
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.)
Revoked
Application number
EP19950109357
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0704260A1 (en
Inventor
Igor Diracca
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.)
IMR SpA
Original Assignee
IMR SpA
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=11368136&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0704260(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by IMR SpA filed Critical IMR SpA
Publication of EP0704260A1 publication Critical patent/EP0704260A1/en
Application granted granted Critical
Publication of EP0704260B1 publication Critical patent/EP0704260B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a core blowing machine for forming shell-molding cores.
  • DE-C-632 671 is a core blowing machine having a sand hopper and blowing head as one unit which can be swung from a lower position where the sand hopper is filled to a working position where the unit is oriented such that the sand hopper is located above the blowing head.
  • a conventional core blowing machine is substantially constituted by a frame that supports the core boxes, at which a blowing head acts; said head injects and compacts inside the core boxes the mix drawn from a loading hopper.
  • the loading hopper is arranged above the blowing head, so as to convey the mix, and considerable difficulties are accordingly encountered in loading the mix in the hopper and in cleaning said hopper at the end of work.
  • the aim of the present invention is indeed to solve the problems described above by providing a core blowing machine for forming cores for shell-molding that allows to load and clean the mix feeding hopper and core boxes much more easily and so as to considerably aid the operators.
  • a particular object of the invention is to provide a core blowing machine that allows to always gently deposit the core on the conveyor belt, avoiding the possibility of weak-core breakages.
  • Another object of the present invention is to provide a core blowing machine that allows to quickly replace the molds when they are still hot or optionally to perform small adjustments when newly-made core boxes are being used.
  • Another object of the present invention is to provide a core blowing machine for forming cores for shell-molding that, by virtue of its particular constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.
  • a core blowing machine for forming cores for shell-molding, comprising a load-bearing frame for supporting core boxes, at which a core-forming mix blowing head acts, said mix being supplied by a mix loading hopper, said machine comprising lifting means for positioning said hopper in the working position and on the ground, characterized in that it further comprises a cleaning unit that can be interposed between said core boxes and is adapted to introduce compressed air or a spray of water and release agent.
  • the core blowing machine for forming cores for shell-molding is generally designated by the reference numeral 1 and comprises a load-bearing frame 2 preferably of the bridge-like type with rectangular electrically welded steel tubes.
  • Guiding and supporting bars 3 are provided on the frame 2 and allow to close the core boxes 4 precisely; said bars are arranged on the opposite side with respect to the operator, so as to allow free access to all the parts of the machine.
  • Adjustment systems are provided to compensate for the various thicknesses of the core boxes; they are constituted by a crank 6 located on the outward side of the machine so as to give the operator the greatest assurances of safety.
  • a conveyor belt 7 is provided below the core boxes; said belt is mounted on a pantograph 8 to adjust its height, so that the overturning of the corresponding core box allows to gently deposit the formed cores onto the conveyor belt.
  • a blowing head 10 is provided at the core boxes; said head is easily interchangeable, since it is installed with a double-bayonet system, and is provided with a forced cooling water circulation system 11 at the part which is in contact with the core box.
  • the mix to be fed to the blowing head is loaded by means of a loading hopper 20 having the particularity of being mounted on lifting means that allow to position the hopper 20 at the working level, above the blowing head, and can lower the hopper down to ground level, thus allowing easy and safe filling with the mix, without having to resort to ladders and considerably facilitating internal cleaning at the end of the work shift.
  • the hopper 20 is rotatable about a vertical axis so as to be better positioned with respect to the blowing head.
  • An automatic metallic male mold part extractor 21 acts at the core boxes, has an axis that is parallel to the mold closing plane, and can insert the electric heating resistors, the temperature whereof is controlled by an instrument located in the electric cabinets.
  • a cleaning unit 30 is provided between the spaced core boxes and is operated by compressed air; as an alternative, a sprayer is used that sprays water and release agent.
  • the two mold supporting heads are rotatable through 90° outwards, since they are rotatable about a vertical axis, as more clearly shown in figure 2, so that changing the still-hot molds is very easy, or to perform small adjustments when using newly-made core boxes.
  • the entire machine is operated by hydraulic actuators that are controlled by an electronic control unit according to a working cycle easily preset by the operator.
  • the materials employed, as well as the contingent shapes and dimensions may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP19950109357 1994-06-15 1995-06-16 Core blowing machine for forming shell-molding cores Revoked EP0704260B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940434 1994-06-15
ITMI940434 IT233503Y1 (it) 1994-06-15 1994-06-15 Macchina spara anime per la realizzazione di anime per lo stampaggio in conchiglia

Publications (2)

Publication Number Publication Date
EP0704260A1 EP0704260A1 (en) 1996-04-03
EP0704260B1 true EP0704260B1 (en) 1999-09-08

Family

ID=11368136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950109357 Revoked EP0704260B1 (en) 1994-06-15 1995-06-16 Core blowing machine for forming shell-molding cores

Country Status (3)

Country Link
EP (1) EP0704260B1 (it)
DE (1) DE69511976T2 (it)
IT (1) IT233503Y1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106216614B (zh) * 2016-09-04 2018-08-03 佛山市恒学科技服务有限公司 一种冷芯盒射芯机的取模装置
IT201700030152A1 (it) * 2017-03-20 2018-09-20 Imr Engineering & Tech S R L Macchina formatrice di anime

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE632671C (de) * 1934-03-06 1936-07-11 Masch U Werkzeugfabrik Kabel Sandblaseformmaschine
EP0359887B1 (en) * 1988-09-19 1993-01-20 Naniwa Products Co, Ltd A top-blow molding machine of the type always opening the upper portion of a core box assembly and a molding sand feeding mechanism of using an exhausting action of the blow head
DE4128952C1 (it) * 1991-08-30 1992-07-09 Adolf Hottinger Maschinenbau Gmbh, 6800 Mannheim, De

Also Published As

Publication number Publication date
DE69511976T2 (de) 2000-04-06
IT233503Y1 (it) 2000-01-28
ITMI940434V0 (it) 1994-06-15
ITMI940434U1 (it) 1995-12-15
DE69511976D1 (de) 1999-10-14
EP0704260A1 (en) 1996-04-03

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