US20040238151A1 - Device for improved supply of mould particle material to the hopper of a foundry machine for mould-making - Google Patents

Device for improved supply of mould particle material to the hopper of a foundry machine for mould-making Download PDF

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Publication number
US20040238151A1
US20040238151A1 US10/487,626 US48762604A US2004238151A1 US 20040238151 A1 US20040238151 A1 US 20040238151A1 US 48762604 A US48762604 A US 48762604A US 2004238151 A1 US2004238151 A1 US 2004238151A1
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US
United States
Prior art keywords
hopper
inlet opening
guiding surface
opening
mould
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.)
Abandoned
Application number
US10/487,626
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English (en)
Inventor
Vagn Mogensen
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.)
Disa Industries AS
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to DISA INDUSTRIES A/S reassignment DISA INDUSTRIES A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOGENSEN, VAGN
Publication of US20040238151A1 publication Critical patent/US20040238151A1/en
Abandoned 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

Definitions

  • the present invention relates to a device for improved supply of mould particle material to the hopper of a foundry machine for mould-making according to the preamble of claim 1 .
  • the conditioned “sand” i.e. the particle material
  • the conditioned “sand” for foundry moulds is normally delivered to the hopper on each individual mould-making machine via gravitational fall from a conveyor system above (e.g. a belt system).
  • a conveyor system above e.g. a belt system.
  • Such machines normally are capable of functioning in repeated cycles of controlled sequential series of steps, each cyclus yielding a mould, that can be part(s) of one/more set(s) of moulds.
  • Such machines normally are furnished with the hopper designed as a pressure chamber provided with a top inlet opening for the falling “sand”, that has a relatively small opening area, which is sealable by means of some type of valve function (e.g. a slide gate), as some or all of the sand from the so sealed hopper by means of pressurized gas (normally air) from a controlled driving gas system is furthered into a mould chamber, whereafter an adequate amount of sand once more is secured in the hopper, before sand once more is furthered into the mould chamber for the consecutive mould, etc.
  • the sand is pressed/squeezed to form a mould component, which after removal leaving space for the next volume of sand to be furthered in, in functional combination with mating component(s) later are poured with molten material.
  • An example of a machine as described above is an automatically functioning mould-making machine of the “Disamatic® ”-type.
  • a relevant mould-making foundry machine To intercept the sand falling from the conveyor system, a relevant mould-making foundry machine normally incorporates a known element with a generally funnel-shaped surface to guide the sand received to the opened top inlet opening of the machine's hopper.
  • the known types of guiding funnels are normally of frusto-conical or frusto-pyramidal shape, the wider end face pointing upwards to offer a wide/long opening to intercept the falling sand, that can have its “delivery positions” from the conveyor system varying according to parameters as: particle material condition, shape of conveyor's delivery opening, horisontal speed component “inherited” from conveyor system, fall height, actual sand flow, etc.
  • the frusto-shape's smaller end face is normally adapted to present a smooth transformation of shape to the opened top inlet opening to facilitate the inflow of falling particle material and to avoid build-up caused by edge-effects during the sand inflow.
  • the main object of the present invention is therefore to provide a device to improve the supply of falling particle material into a foundry machine's hopper through the inlet opening by overcoming the problems described above.
  • the device for improved sand supply therefore possesses the following characterizing features:
  • the device being an at least meta-stable guiding surface being the circumferring internal side(s) surface(s) of a frusto-conical/-pyramidal/funnel-shaped tapering space in a structure;
  • the narrower, open end face of said tapering space being arranged at said inlet opening of the foundry machine's hopper, allowing for a possible stream of intercepted particle material to substantially unhindered pass the opened said inlet opening after leaving said narrower end face;
  • said structure circumferring said tapering space outside of its said guiding surface and facing a possibly existing frusto-shaped guiding surface for falling particle material to said machine's hopper, is allowing for at least one upstream of escaping air/gas being replaced with a stream of particle material flowing down into said hopper through said narrower end, to leave the hopper volume without intermixing with said counterflowing stream of particle material in said opened inlet opening, by providing at least one opening relative to the opened inlet opening off said narrower, open end face,
  • the structure is substantially made of sheet material, as such material inherently is offering a smooth guiding surface, hindering local build-ups.
  • the tapered space is positioned approximately vertically, centrally to the opened said inlet opening, as such placement normally is best suited for all-round mould production, due to the provision of a substantially ring-shape opening at the edge of the opened inlet opening for the counterflowing escaping gas from the hopper cushioning the opening seals from particles.
  • the at least meta-stable guiding surface is of/lined with a smooth and low-friction material, e.g. a PTFE-composite, thus offering improved avoidance of local build-up/blocking of particle material(s) of difficult-to-handle composition and/or condition.
  • a smooth and low-friction material e.g. a PTFE-composite
  • the structure is controlled movable up and down in a sequence related to the opening/closing of said inlet opening, thus better being able to intercept the falling stream of sand by approaching a delivery source, especially at the beginning of a delivery phase.
  • the structure partly is temporarily positioned below said opened inlet opening, thus better protecting the seals against particle deposition and offering possibility to better control the dispensing of sand in the hopper.
  • the structure is pivotable in a substantial vertical plane, thus being able to better “follow” the falling stream of sand to intercept.
  • the structure is pivotable in a substantial vertical plane escaping physical contact with the element(s) closing the inlet opening and vice versa, thus in some cases permitting prolonged filling of the hopper during the start of the closing of the inlet opening to further minimize cycle-time.
  • the narrower end of the structure might be optimized profilated and positioned accordingly, so the last particle material slides the side of the guiding surface farthest form the nearest edge of the inlet opening closing member.
  • the structure is comprising exitating means, e.g. vibrating means, to further facilitate the flow of particle material over the guiding surface to avoid deposition.
  • exitating means e.g. vibrating means
  • the device is comprising motive and/or detection means controlled by/communicating with said machine and/or a conveying system supplying said falling particle material. So, the movements might be optimized to save time, resulting in higher overall production rate.
  • FIG. 1 depicts a side elevated, highly schematic, vertical section of an embodiment of the inventive device on top of a hopper of a mould-making foundry machine, being supplied with particle material from a supply system above;
  • FIG. 2 depicts the same as FIG. 1, but as seen from the left side of FIG. 1;
  • FIG. 3 depicts, partly in section, some further illustrative details of the inventive device and of the hopper and of the sand supply system as in FIG. 1 to further clarify the invention.
  • FIG. 1 is shown the hopper 1 of a mould-making foundry machine, of whose lower parts only the chamber 2 for forming the mould by relatively approaching the two opposed movable end walls fitted with pattern plates, thus squeezing the intermediate particle material to be a relatively stable block, is schematically indicated.
  • the machine generally being of the commonly known “Disamatic®”-type and functioning accordingly.
  • FIG. 2 the hopper 1 bottom part is not conical, but merges in the mould chamber 2 ceiling by a slit across the pressing directions.
  • the step of supplying sand 3 to the hopper is shown, as the hopper 1 has already been partly filled with sand 3 , which has passed the opened inlet opening 4 , while more sand 5 is downstreaming as a falling jet from a supply system above, which has not been further referenced to, but can be seen depicted as a belt-type conveying system, the movement of the belt, at least of on/off-type, being controlled according to the demand for further material according to communication to/from a controlling system also controlling the foundry machine below.
  • the conditioned particle material mixture (the “sand”) 5 is rolled off the conveyor band to the left in FIG. 1 and is falling as a stream driven by gravity, but also still moving according to a horisontal velocity component inherited from the movement with the band. Conforming the belt speed, the sand 5 thus will take a direction downwards more or less off-center the opened inlet opening 4 .
  • the inventive device 6 is shown as made of sheet material following a frusto-conical shape, the lower, narrower end pointing to the center of the inlet opening, thus defining an effectively smaller outlet opening at the lower edge of the guiding surface for the downstreaming sand internally of the structure of the inventive device.
  • the wider end of the guiding surface is pointing substantially upwards to catch the falling sand by intercepting the stream 5 from the supply system.
  • Ability to rock or swing the wider opening of the guiding surface in a substantially vertical plane following the directions of movement of the belt offers a better ability to intercept the stream of falling sand 5 as this “covers” an elongated area depending of the actual speeds of the belt.
  • the falling sand 5 is from the narrower end of the guiding surface passing the opened inlet opening 4 as a concentrated, centered jet or beam of falling material.
  • This beam is guided by the inventive device 6 to leave a circular opening at 7 near the edge of the inlet opening to allow for the unhindered counterflowing escape of gas form the hopper, that is driven out as the volume is being occupied from sand 3 .
  • the escaping counterflowing upstream of gas/air from the hopper 3 is symbolised by the arrows as at 7 , clearly showing the non-interference of the two counterstreams of sand and air respectively faciltating the entrance of sand into the hopper without blocking the inlet opening and the exit of gas from the hopper without carrying out intermixed fines from the particle material 5 to disturb/pollute the surroundings/environment.
  • the escaping counterflowing upstream of gas/air is also cushioning the circumferential seal 8 and the domed sealing body 9 of such exemplarily shown dome valve for sealing the inlet opening, thus hindering deposition of particle material at the sealing faces and resulting excessive wear of these components.
  • bracketing at least some structure of the inventive device to the other stationary components preferably of the foundry machine, but possibly also to the sand supply system and/or a present ventilating system, is not shown, as such brackets, etc present no major challenge to a person skilled in the art to craft/design/manufacture.
  • the possible means to raise/lower/pivot and/or vibrate the guiding surface of the inventive device 6 are also of evident character for the skilled person to understand and execute and will thus be treated no further here.
  • the narrower opening of the “delivering” end of the guiding surface of the device 6 according to the present invention has a smaller area than the opening of the inlet opening 4 , hitherto used comparatively “unrestricted”, a more even distributed and speedier supply of the required volume of sand to the hopper is achieved, by the beneficial function of the device according to the present invention.
  • the resulting improvement in overall effective cycle time for the mould-making system is also making retrofitting of the inventive device 6 relevant to existing foundry machines, not presently being equipped with such device 6 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US10/487,626 2001-12-20 2001-12-20 Device for improved supply of mould particle material to the hopper of a foundry machine for mould-making Abandoned US20040238151A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK2001/000855 WO2003053609A1 (fr) 2001-12-20 2001-12-20 Dispositif permettant d'effectuer un meilleur approvisionnement d'un materiau particulaire de moulage dans la tremie d'une machine a mouler conçue pour la fabrication de moules

Publications (1)

Publication Number Publication Date
US20040238151A1 true US20040238151A1 (en) 2004-12-02

Family

ID=8149454

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Application Number Title Priority Date Filing Date
US10/487,626 Abandoned US20040238151A1 (en) 2001-12-20 2001-12-20 Device for improved supply of mould particle material to the hopper of a foundry machine for mould-making

Country Status (6)

Country Link
US (1) US20040238151A1 (fr)
EP (1) EP1455971B1 (fr)
AU (1) AU2002215877A1 (fr)
DE (1) DE60110849T2 (fr)
ES (1) ES2242706T3 (fr)
WO (1) WO2003053609A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060266427A1 (en) * 2005-05-26 2006-11-30 Wyeth Pharmaceuticals. Mixing apparatus
US20150108325A1 (en) * 2013-10-23 2015-04-23 Keith Ryan Method and apparatus for electrically-heated refractory moulds and mandrels

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599649A (en) * 1969-04-10 1971-08-17 Nat Eng Co Apparatus for cooling granular material
US3613770A (en) * 1970-02-12 1971-10-19 Sherwin Williams Co Foundry sand article forming machine with pivotal blow reservoir
US3989086A (en) * 1973-09-26 1976-11-02 Erwin Buhrer Method of and apparatus for the production of mold parts for foundries
US3994332A (en) * 1975-04-21 1976-11-30 The Quaker Oats Company Apparatus and method for manufacturing cores and molds with means for independently releasing catalyst and resin mixes
US4450888A (en) * 1980-02-01 1984-05-29 Npo "Viilitmash" Moulding plant
US4643240A (en) * 1984-04-12 1987-02-17 Pettibone Corporation Method of blowing cores etc. using quick-set sand, and improved mold-blowing apparatus
US4971135A (en) * 1989-02-23 1990-11-20 Outboard Marine Corporation Lost foam casting apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078201A (en) * 1989-11-27 1992-01-07 Osaka Shell Industry Co., Ltd. Casting core fabricating apparatus
JPH04143044A (ja) * 1990-10-04 1992-05-18 Kazuji Tanaka 自硬性鋳型の造型方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599649A (en) * 1969-04-10 1971-08-17 Nat Eng Co Apparatus for cooling granular material
US3613770A (en) * 1970-02-12 1971-10-19 Sherwin Williams Co Foundry sand article forming machine with pivotal blow reservoir
US3989086A (en) * 1973-09-26 1976-11-02 Erwin Buhrer Method of and apparatus for the production of mold parts for foundries
US3994332A (en) * 1975-04-21 1976-11-30 The Quaker Oats Company Apparatus and method for manufacturing cores and molds with means for independently releasing catalyst and resin mixes
US4450888A (en) * 1980-02-01 1984-05-29 Npo "Viilitmash" Moulding plant
US4643240A (en) * 1984-04-12 1987-02-17 Pettibone Corporation Method of blowing cores etc. using quick-set sand, and improved mold-blowing apparatus
US4971135A (en) * 1989-02-23 1990-11-20 Outboard Marine Corporation Lost foam casting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060266427A1 (en) * 2005-05-26 2006-11-30 Wyeth Pharmaceuticals. Mixing apparatus
US20150108325A1 (en) * 2013-10-23 2015-04-23 Keith Ryan Method and apparatus for electrically-heated refractory moulds and mandrels

Also Published As

Publication number Publication date
AU2002215877A1 (en) 2003-07-09
DE60110849D1 (de) 2005-06-16
DE60110849T2 (de) 2006-02-23
EP1455971A1 (fr) 2004-09-15
ES2242706T3 (es) 2005-11-16
EP1455971B1 (fr) 2005-05-11
WO2003053609A1 (fr) 2003-07-03

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AS Assignment

Owner name: DISA INDUSTRIES A/S, DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOGENSEN, VAGN;REEL/FRAME:016236/0346

Effective date: 20031022

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION