EP0106220A2 - Installation pour conduire d'une manière contrôlable des milieux gazeux - Google Patents

Installation pour conduire d'une manière contrôlable des milieux gazeux Download PDF

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Publication number
EP0106220A2
EP0106220A2 EP83109609A EP83109609A EP0106220A2 EP 0106220 A2 EP0106220 A2 EP 0106220A2 EP 83109609 A EP83109609 A EP 83109609A EP 83109609 A EP83109609 A EP 83109609A EP 0106220 A2 EP0106220 A2 EP 0106220A2
Authority
EP
European Patent Office
Prior art keywords
hollow body
pressure chamber
pressure
molding
passage
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.)
Withdrawn
Application number
EP83109609A
Other languages
German (de)
English (en)
Other versions
EP0106220A3 (fr
Inventor
Kurt Fischer
Hans Tanner
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0106220A2 publication Critical patent/EP0106220A2/fr
Publication of EP0106220A3 publication Critical patent/EP0106220A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device for compacting granular molding materials, in particular foundry molding materials, a pressure surge of a gaseous medium being applied to the surface of a molding material mass loosely poured over a model device.
  • a passage covers a passage opening by means of a membrane or a plate-shaped shut-off device, and thus a closing or opening of the passage cross section is achieved.
  • the passage cross section determines; taking advantage of the full passage, the stroke of the sealing member, be it a membrane, a valve disk or the like.
  • Figures 1 to 4 show designs which have the same inventive feature, according to which a sealing plane 1 is formed from ends 5 of a plurality of hollow bodies 2.
  • the hollow bodies 2 are in this case inserted separately from one another in a housing 3 and thereby form, with their spacing, cavities 4 which, with the interior 15 of the housing, result in an undivided space.
  • the openings 6 facing away from the sealing plane 1 open outward from the housing 3, into a molding space above a molding material mass.
  • the arrangement of the hollow bodies 2 is such that their longitudinal axes run parallel to one another. However, it is also possible to provide the axes radiating to one another.
  • the ends 6 of the hollow body 2 facing away from the sealing plane 1 are sealed and form part of the housing 3 thus part of the housing wall.
  • the length and the distance of the hollow bodies 2 projecting into the pressure chamber and thus the space between the hollow bodies 2 depends on the total cross section from the large number of hollow body through-sections. Pointing the way, the condition of a low-loss flow through a pressure medium should be met.
  • a plate-shaped piston is provided as a sealing member 7 which is designed with one or more pocket-shaped recesses 8 in order to save weight and is preferably coated on the sealing side with an elastomer.
  • This piston is inserted in a sealing housing 9 in such a way that it is loosely guided to the circumferential inner surface 10 of the sealing housing with little play.
  • a suitable clearance has been found to be 0.1 - 0.3 mm.
  • the circumferential outer surface of such a piston can also be made cambered.
  • the sealing housing 9 is connected to the device housing 3 via struts 11.
  • a pressure gas to the piston 7 e.g. Compressed air leads a control line 12 through the housing cover 14 into the sealing. housing 9, and can be connected via a valve 13 to a control device, not shown.
  • the valve 13 can be operated pneumatically, hydraulically or electrically.
  • the tube ends 5 of the hollow bodies 2 combined in the sealing plane 1 are treated as a sealing surface.
  • the openings 6 of the hollow body 2 facing away from the sealing plane 1 open into an outlet part 16 of the housing 3 and are tightly connected at their periphery to a bottom part 17 of the housing 3.
  • this outlet part 15 has a flange connection 18 which is designed for connection to an exemplary shaping device.
  • Other common connection options can also be used.
  • FIG. 2 shows a cross section through the hollow body arrangement 2 from FIG. 1 along the line A - A.
  • the hollow bodies 2 are arranged as tubes with partly the same, partly unequal round cross section.
  • the axes of the hollow bodies 2 are provided running parallel to one another.
  • the horizontal cross sections of the hollow bodies 2 and, accordingly, the cross sections of the interstices 4 between the hollow bodies 2 largely depend on the flow pattern of the conveyed medium. From a fluidic point of view, it can be advantageous to vary the hollow body cross sections from the outside inwards, based on a bundle of hollow bodies. Larger hollow body cross-sections 21 are advantageously divided by transverse webs 22, whereby a distribution of the contact pressure of the sealing member 7 is achieved.
  • Figure 3 shows a similar design as shown in Figure 1.
  • the hollow bodies 2a are arranged in the form of a beam, and they can be designed to be cylindrical as well as flared.
  • the sealing element 7a resting in the sealing plane 1 on the hollow body ends 5a is designed as a self-contained sealing element.
  • the inside toward the sealing plane 1 is provided with a reinforcing plate 27 for receiving the sealing pressure.
  • the reinforcing plate 23 made of light metal or plastic is provided in a suitable shape.
  • a material is selected for this which has sufficient inherent rigidity and is nevertheless flexible. Armored elastomers are preferably used.
  • the housing 3a used here has on the top 25 a sealing housing 9a for the sealing member 7a.
  • This sealing housing 9a is advantageously detachably connected to the housing 3a.
  • a supply line 26 for the conveyed medium, for example compressed air, is provided on the side of the housing 3a.
  • This feed line 26 is equipped with a valve 27, with which the feed line 26 can be closed or opened or throttled.
  • the output ends 28 of the hollow body 7a open into a cylindrical outlet part 29 which is equipped with a flange for connection to a connecting part 30.
  • the ends 28 are in this case connected to the outlet part 29 in a sealing manner with a base part 31.
  • the requirement must be met that the sum of the spaces between the hollow bodies 7a is at least as large as the total cross-sectional area from the plurality of hollow body passage cross sections. This ensures an unimpeded flow of the medium.
  • FIG. 4 shows an embodiment which is designed with a molding device for the production of casting molds.
  • the upper part of the housing 3b is covered with a cover 37 in which the sealing plane 1 is located.
  • the sealing plane 1 is in this case, similar to FIG. 1, formed by a plurality of ends 5b of hollow bodies 2b which are separated from one another and run in the direction of action of the medium delivery.
  • the ends 5b of the hollow body 2b are also designed as a sealing surface.
  • the outlet ends 33 of the hollow body 2b are tightly connected on their outer circumference to a bottom part 34 of an outlet part 35.
  • the outlet part 35 is in turn assembled with a bottom part 36 of the housing 3b and thus delimits a housing interior 41 together with the cover 37 and a sealing member 7b.
  • a plate is provided as a membrane, which is received circumferentially on the one hand on the housing cover 37 and on the other hand on the sealing cover 38.
  • a control line 39 leads through the cover 38 and can be actuated via a valve 40.
  • the valve 40 can be actuated pneumatically, hydraulically as well as electrically.
  • a supply line 42 for a conveying medium e.g. Compressed air, provided.
  • a valve 43 inserted in the supply line 42 enables a constant or interrupted supply of compressed gas to the interior 41 of the housing.
  • the device shown as a combination with a molding device shows the housing 3b which is designed with its lower end for coupling to the molding device.
  • the molding device consists of a filling frame 44, a molding frame 45 and a model unit 46 as well as a cylinder arrangement 47 for raising and lowering this combination.
  • Designated at 48 is a molding material, via the filling rate of which a vent line 49 with valve 50 is provided in the housing 3b.
  • the compressed gas remaining after the inflow over the molding material can thus be released before the molding device is lowered.
  • the combination is then separated.
  • the functional sequence of the device according to the invention is as follows. Assuming that a gas shaped medium must be transported, a pressure medium is exerted by the control line with a predetermined pressure on the sealing member and this is brought to the sealing system on the sealing surface. Subsequently, a delivery medium is brought into the housing, ie into the pressure chamber, through the supply line, and the device is thus prepared for passing the delivery medium through or for achieving a pressure surge.
  • the pressure surge effects can be changed, whereby both the pressure intensity and the quantity intensity can be varied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
EP83109609A 1982-10-15 1983-09-27 Installation pour conduire d'une manière contrôlable des milieux gazeux Withdrawn EP0106220A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6014/82 1982-10-15
CH6014/82A CH664914A5 (de) 1982-10-15 1982-10-15 Einrichtung zum verdichten einer masse von koernigem formstoff.

Publications (2)

Publication Number Publication Date
EP0106220A2 true EP0106220A2 (fr) 1984-04-25
EP0106220A3 EP0106220A3 (fr) 1985-05-15

Family

ID=4302856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109609A Withdrawn EP0106220A3 (fr) 1982-10-15 1983-09-27 Installation pour conduire d'une manière contrôlable des milieux gazeux

Country Status (9)

Country Link
US (1) US4565235A (fr)
EP (1) EP0106220A3 (fr)
JP (1) JPS5992145A (fr)
CA (1) CA1205974A (fr)
CH (1) CH664914A5 (fr)
CS (1) CS237344B2 (fr)
DD (1) DD219130A5 (fr)
DK (1) DK476483A (fr)
PL (1) PL140303B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490701A3 (en) * 1990-12-14 1993-12-22 Sintokogio Ltd Compressed air blowing apparatus for use in green sand mold molding facility

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH666426A5 (de) * 1984-06-25 1988-07-29 Fischer Ag Georg Formanlage.
ES2006861A6 (es) * 1988-03-21 1989-05-16 Lopez Foronda Fernandez Vicent Mejoras introducidas en campanas de aire para moldeo por onda expansiva.
US8397745B2 (en) 2007-02-12 2013-03-19 Colt Irrigation, LLC Fluid activated flow control apparatus
US9341281B2 (en) 2007-02-12 2016-05-17 Colt Irrigation Llc Fluid activated flow control apparatus
US10571937B1 (en) 2014-01-23 2020-02-25 Colt Irrigation, LLC Valve control apparatus
US9599286B2 (en) 2014-01-23 2017-03-21 Colt Irrigation, LLC Fluid activated flow control apparatus
US10088849B2 (en) 2014-01-23 2018-10-02 Colt Irrigation, LLC Fluid activated flow control apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003348A1 (fr) * 1981-04-02 1982-10-14 Koebel Alfons Procede et dispositif de compactage pneumatique de sable de moulage
EP0084627B1 (fr) * 1981-12-28 1986-05-07 BMD Badische Maschinenfabrik Durlach GmbH Dispositif pour comprimer du matériel de moulage pour fonderies
CH648225A5 (de) * 1982-10-01 1985-03-15 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen formstoffen, insbesondere giessereiformstoffen.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490701A3 (en) * 1990-12-14 1993-12-22 Sintokogio Ltd Compressed air blowing apparatus for use in green sand mold molding facility

Also Published As

Publication number Publication date
CS237344B2 (en) 1985-07-16
CH664914A5 (de) 1988-04-15
PL244155A1 (en) 1984-07-02
EP0106220A3 (fr) 1985-05-15
DK476483D0 (da) 1983-10-14
JPH0219739B2 (fr) 1990-05-02
CA1205974A (fr) 1986-06-17
PL140303B1 (en) 1987-04-30
CS736483A2 (en) 1984-06-18
DK476483A (da) 1984-04-16
JPS5992145A (ja) 1984-05-28
DD219130A5 (de) 1985-02-27
US4565235A (en) 1986-01-21

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

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17P Request for examination filed

Effective date: 19830927

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI SE

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): CH DE FR GB IT LI SE

17Q First examination report despatched

Effective date: 19860806

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19861224

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FISCHER, KURT

Inventor name: TANNER, HANS