EP0019074B1 - Tuyère pour aérer, ventiler ou charger des moules - Google Patents

Tuyère pour aérer, ventiler ou charger des moules Download PDF

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Publication number
EP0019074B1
EP0019074B1 EP80101806A EP80101806A EP0019074B1 EP 0019074 B1 EP0019074 B1 EP 0019074B1 EP 80101806 A EP80101806 A EP 80101806A EP 80101806 A EP80101806 A EP 80101806A EP 0019074 B1 EP0019074 B1 EP 0019074B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
sheet
wall
apertures
nozzle wall
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
EP80101806A
Other languages
German (de)
English (en)
Other versions
EP0019074A1 (fr
Inventor
Gottfried Zimmermann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0019074A1 publication Critical patent/EP0019074A1/fr
Application granted granted Critical
Publication of EP0019074B1 publication Critical patent/EP0019074B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B22C7/065—Venting means
    • 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 invention relates to a nozzle for venting, aerating or loading molds for foundry purposes or for plastics processing.
  • nozzles are used for blow core boxes, mold core boxes or models for the vacuum molding process.
  • Nozzles are also used in a variety of ways in plastics processing.
  • the nozzles to be inserted into the mold wall have the task, on the one hand, of discharging the air quickly and completely when filling the mold and, on the other hand, of leaving the mold surface as undisturbed as possible.
  • steaming foam molds steam is sent through the nozzles into the filler of the mold.
  • the nozzles are intended to ensure the passage of air or steam, but to prevent the filler from escaping.
  • Nozzles are customary with a holding part to be inserted into the mold wall, which is closed towards the interior of the mold with a nozzle wall which has a large number of through openings.
  • the passage openings most often consist of parallel slots.
  • the problem with such nozzles is that the passage openings should be as fine as possible, but must not become blocked.
  • the two requirements are to be taken into account by conical design of the slot cross sections.
  • Spacers provided on the back of the webs between the individual slots should help with this, but they hinder the passage of air and favor the clogging of the cross sections.
  • the manufacturing effort is significantly increased by such additional parts and the cleaning ability deteriorated.
  • the invention has for its object to be able to produce nozzles with the finest possible through openings without special effort, which do not clog easily and are able to withstand high pressures.
  • the nozzle wall with a film which has openings in the area of the passage openings of the nozzle wall, which have smaller dimensions than the passage openings of the nozzle wall.
  • the base body of the nozzle made of aluminum, brass, free-cutting steel or plastic consists of the cylindrical holding part 1 and the nozzle wall 3.
  • the holding part 1 is inserted into the indicated mold wall 2, while the nozzle wall 3 forms the end of the mold interior.
  • the nozzle wall 3 is provided with a foil 4 made of stainless steel (for example by gluing).
  • the nozzle wall 3 has a plurality of through openings 5 for the medium to be discharged.
  • the film 4 has corresponding openings 6 with smaller dimensions, so that the film slightly protrudes through the openings 5. For example, while the nozzle wall 3 has slots 0.8 mm wide, the openings 6 of the film 4 are only 0.5 mm wide.
  • the nozzle wall 3 with the film 4 forms the boundary of the mold surface in such a way that the wear of the nozzle is reduced and fine grains of sand find an enlarged space behind the film 4 and therefore cannot settle.
  • the film 4 also stabilizes the nozzle wall 3 and prevents lateral displacements of the slot webs, ie changes in the passage openings 5.
  • the design of the openings 6 can be different.
  • Fig. 2a shows continuous slots 7.
  • Fig. 2b also slots, but the webs 8 of the film 4 are connected by a crossbar 9 for further stabilization. It is no longer possible to change the slot width by deforming the nozzle.
  • FIG. 2c shows, openings in the form of bores 10 are also possible.
  • the different ways Refractions 6 in the film 4 can be stamped in a simple manner.
  • the passage cross section can be reduced further by either executing the film 4 in two layers with overlapping openings (FIGS. 4 and 5) or executes the film in two parts and joins them together to the desired slot width (Fig. 6).
  • the passage cross section is determined through the area 13 in which the openings 6 'of the upper layer 4' and 6 "of the lower layer 4" come to lie one above the other.
  • the guide groove 12 at the lower end of the holding part 1 is used for guiding and adjusting during production so that the through openings 5 of the nozzle wall 3 match the openings 6 of the film 4 in the desired manner when the two parts are connected.
  • the medium flowing through the nozzles emerges from the interior of the mold, there are other cases in which the medium is to be introduced into the mold or the like from the outside.
  • the film is expediently attached to the side of the nozzle plate on which the medium occurs, i.e. in foundry molds - as shown in the figures - on the side delimiting the mold cavity.
  • the openings could become smaller from layer to layer. Behind the larger passage openings 5, instead of a smaller opening 6, nests of fine holes could be arranged in the film 4 without deviating from the principle of the invention.
  • the film 4 could also be teflonized or the free hole edge of the film could be slotted, so that fluttering is possible and the result is that the nozzle remains clean.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)

Claims (9)

1. Buse pour le dégazage, la mise à l'atmosphère ou l'alimentation de moules de fonderie ou pour la mise en oeuvre de matière synthétique ou analogue, cette buse étant composée d'une pièce de retenue (1) destinée à être insérée dans la paroi (2) du moule et terminée par une cloison (3) présentant une pluralité d'ouvertures de passage (5), caractérisée en ce que la cloison (3) est munie d'une feuille (4) qui, dans le champ des ouvertures de passage (5) de la cloison (3), présente des percées (6) de dimension plus petite que les ouvertures de passage (5) de la cloison (3) de la buse.
2. Buse selon la revendication 1, caractérisée en ce que la cloison (3) est munie de la feuille (4) du côté délimitant l'empreinte du moule.
3. Buse selon la revendication 1, caractérisée en ce que la feuille (4) est appliquée du côté de la cloison (3) opposé à l'empreinte du moule.
4. Buse selon l'une des revendications 1 à 3, caractérisée en ce que les parties (11) de la feuille (4) qui se superposent aux ouvertures de passage (5) dans la cloison (3) sont inclinées en direction de ces ouvertures de passage (5).
5. Buse selon l'une des revendications 1 à 4, caractérisée en ce que la feuille (4) est en acier spécial.
6. Buse selon l'une des revendications 1 à 4, caractérisée en ce que les ouvertures de passage (5) et les percées (6) sont en forme de fentes, les percées en forme de fentes de la feuille (4) étant interrompues par au moins un plein transversal (9).
7. Buse selon l'une des revendications 1 à 6, caractérisée en ce que la feuille (4) se compose de deux couches superposées (4', 4") dont les percées (6', 6") s'intersectent.
8. Buse selon l'une des revendications 1 à 6, caractérisée en ce que la feuille (4) se compose de deux feuilles partielles (14) juxtaposées, en forme de peignes dont les dents (15) s'imbriquent les unes entre les autres jusqu'à la largeur désirée pour les percées (6).
9. Buse selon l'une des revendications 1 à 8, caractérisée en ce que la pièce de retenue (1) est munie, du côté opposé à la cloison (3), d'une rainure de guidage (12).
EP80101806A 1979-04-24 1980-04-03 Tuyère pour aérer, ventiler ou charger des moules Expired EP0019074B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2916465A DE2916465C2 (de) 1979-04-24 1979-04-24 Düse zum Entlüften, Belüften oder Bedampfen von Formen
DE2916465 1979-04-24

Publications (2)

Publication Number Publication Date
EP0019074A1 EP0019074A1 (fr) 1980-11-26
EP0019074B1 true EP0019074B1 (fr) 1982-02-03

Family

ID=6069084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101806A Expired EP0019074B1 (fr) 1979-04-24 1980-04-03 Tuyère pour aérer, ventiler ou charger des moules

Country Status (2)

Country Link
EP (1) EP0019074B1 (fr)
DE (2) DE2916465C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002939A1 (de) * 1980-01-28 1981-07-30 Gottfried 6335 Lahnau Zimmermann Duese zum entlueften, belueften oder bedampfen von formen
JPS6031580B2 (ja) * 1982-11-08 1985-07-23 保土谷化学工業株式会社 モ−ルド用ベント
US5560695A (en) * 1991-08-26 1996-10-01 Southco, Inc. Venting device
DE4229810C2 (de) * 1991-09-27 1995-02-23 Georg Fischer Giesereianlagen Modellplattenträger für druckluftbeaufschlagte Verdichtungsverfahren
DE9412159U1 (de) * 1994-07-22 1994-10-20 Künkel Wagner Service- und Vertriebsgesellschaft mbH, 31061 Alfeld Steuerbare Luftverteilung zum Vorverdichten
AT413949B (de) * 2003-06-17 2006-07-15 Boehler Bleche Multilayer Gmbh Einrichtung zur erstellung von giessformen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD12587A (fr) *
DD75126A (fr) *
US2060350A (en) * 1936-05-18 1936-11-10 Carl R Siler Core box vent plug
AT188036B (de) * 1955-05-26 1956-12-27 Hermann Willy Krausz Düse zum Kernblasen
US3187391A (en) * 1962-11-19 1965-06-08 Int Harvester Co Blow plate for core blowers

Also Published As

Publication number Publication date
EP0019074A1 (fr) 1980-11-26
DE3060173D1 (en) 1982-03-11
DE2916465B1 (de) 1980-11-20
DE2916465C2 (de) 1981-08-27

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