EP0353119A1 - Modellplatte für die Gestaltung von Formen, bestimmt zur Herstellung von Glasdichtungen mittels Giessereisand bei Vorhandensein einer Wulst in der Gegenformschräge - Google Patents

Modellplatte für die Gestaltung von Formen, bestimmt zur Herstellung von Glasdichtungen mittels Giessereisand bei Vorhandensein einer Wulst in der Gegenformschräge Download PDF

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Publication number
EP0353119A1
EP0353119A1 EP89401935A EP89401935A EP0353119A1 EP 0353119 A1 EP0353119 A1 EP 0353119A1 EP 89401935 A EP89401935 A EP 89401935A EP 89401935 A EP89401935 A EP 89401935A EP 0353119 A1 EP0353119 A1 EP 0353119A1
Authority
EP
European Patent Office
Prior art keywords
model plate
movable
plate according
bead
sand
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.)
Granted
Application number
EP89401935A
Other languages
English (en)
French (fr)
Other versions
EP0353119B1 (de
Inventor
Claude Georges Daumas
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.)
Mancelle de Fonderie SA
Original Assignee
Mancelle de Fonderie SA
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 Mancelle de Fonderie SA filed Critical Mancelle de Fonderie SA
Priority to AT89401935T priority Critical patent/ATE88930T1/de
Publication of EP0353119A1 publication Critical patent/EP0353119A1/de
Application granted granted Critical
Publication of EP0353119B1 publication Critical patent/EP0353119B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22C7/005—Adjustable, sectional, expandable or flexible patterns

Definitions

  • the invention relates to the manufacture by foundry in sand of parts having undercut parts, and more particularly of glass seals or similar parts having a protrusion in the form of an annular bead.
  • the object of the invention is to eliminate the above drawbacks, that is to say to produce a model plate forming in the sand the location for a bead undercut during the compression of the sand, but not having no undercut during extraction of the mold or model, and whose geometry of the shape thus obtained is perfectly controlled and independent of the vagaries of operating conditions.
  • the invention essentially consists in constituting the deformable part in the form of an annular ring pinched between a fixed external part and an axially movable internal part.
  • each model of the plate into three parts, including a fixed external part having the external profile of the part from the joint plane until the birth of the bead, and having a bore slightly larger inside than that of the part, an interior part embedded in the model plate and movable axially over a short stroke defined by mechanical stops between an extended position, towards which it is returned by elastic means, and a retracted position towards which is pushed back by the pressure of the sand during compaction, this movable inner part having internally a blind bore to the inner diameter of the part to be molded and the bottom of which is in said retracted position at the reference plane of the model plate, the external surface of this internal part being adjusted to slide in the internal bore of the external part over at least the height of the latter and ending at the upper part with a rim projecting towards the outside, and finally an elastomer ring mounted on the periphery of this interior part, between said rim and the end of the exterior part, this elastomer ring having a shape at
  • This annular elastomer ring as well as the location which is intended for it, preferably have a section ensuring its retention, for example a dovetail section.
  • model plate 1 which generally comprises several models of which only one is shown.
  • this plate is fixed by usual means and, possibly, embedded, the external part 2, the part projecting above the reference plane 3 of the model plate 1 has an external profile 4 representing the external form of the part to be obtained. from the reference plane 3 to point 5 which corresponds to the birth of the undercut bead.
  • this outer part 2 is delimited by a bore 6 with a diameter slightly greater than the bore of the part to be molded.
  • the movable inner part 7 has a blind inner bore 13 whose diameter is that of the part to be molded, and the bottom 14 of which is, in the retracted position according to FIG. 2, at the exact level of the reference plane 3 of the model plate 1.
  • the surface outer 15 of this inner part 7 is adjusted to slide inside the bore 6 of the fixed outer part 2, at least over the entire height of the latter, and the cylindrical wall 16 of thin thickness thus formed between the bores 6 and 13 ends at its free end with a flange 17 protruding outward without ever exceeding the diameter of the circle 5 representing the limit of the bead.
  • the upper part of the cylindrical surface 15 of the wall 16 defines, with the facing surfaces 18 of the upper edge of the fixed part 2 and 19 of the rim 17 of the moving part 7, the three sides of a section, preferably in dovetail shape, into which an annular elastomer ring 20 is inserted, the outside diameter of which, in the rest position, that is to say therefore in the extended position shown in FIG. 1, does not not exceed or is less than the diameter of the circle 5 defined above, so as to have no undercut.
  • This outer diameter of the ring 20 is even preferably slightly smaller than that of the circle 5, so as to compensate for an always possible persistence of the deformation of the elastomer.
  • the annular ring 20 resumes its shape without undercut of Figures 1 and 3, thanks to its own elasticity aided by the force of the springs 10, which allows this extraction in an easy manner without risk of damage the form of sand obtained, and without requiring the cohesion of this sand to be particularly hard.
  • the sand mold thus formed is then closed and the metal is poured in the usual way to manufacture the parts which have exactly the desired shape with great precision and great regularity of shape.
EP89401935A 1988-07-07 1989-07-06 Modellplatte für die Gestaltung von Formen, bestimmt zur Herstellung von Glasdichtungen mittels Giessereisand bei Vorhandensein einer Wulst in der Gegenformschräge Expired - Lifetime EP0353119B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401935T ATE88930T1 (de) 1988-07-07 1989-07-06 Modellplatte fuer die gestaltung von formen, bestimmt zur herstellung von glasdichtungen mittels giessereisand bei vorhandensein einer wulst in der gegenformschraege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809257A FR2633851B1 (fr) 1988-07-07 1988-07-07 Plaque modele pour la realisation de moules destines a la fabrication par fonderie au sable de joints-glaces ou pieces similaires presentant un bourrelet en contre-depouille
FR8809257 1988-07-07

Publications (2)

Publication Number Publication Date
EP0353119A1 true EP0353119A1 (de) 1990-01-31
EP0353119B1 EP0353119B1 (de) 1993-05-05

Family

ID=9368211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401935A Expired - Lifetime EP0353119B1 (de) 1988-07-07 1989-07-06 Modellplatte für die Gestaltung von Formen, bestimmt zur Herstellung von Glasdichtungen mittels Giessereisand bei Vorhandensein einer Wulst in der Gegenformschräge

Country Status (6)

Country Link
US (1) US4952282A (de)
EP (1) EP0353119B1 (de)
AT (1) ATE88930T1 (de)
DE (1) DE68906323T2 (de)
ES (1) ES2040482T3 (de)
FR (1) FR2633851B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2183667B1 (es) * 1999-11-19 2004-05-16 Loramendi, S.A. Maquina de moldeo de motas, perfeccionada.
US8373368B2 (en) * 2009-02-09 2013-02-12 Ioan Achiriloaie Energy storage device
CN104985115B (zh) * 2015-06-30 2017-12-26 重庆市合川区云天机械制造有限公司 制作油泵柱塞砂模的可拆分模具
CN106694813A (zh) * 2015-11-13 2017-05-24 成都兴宇精密铸造有限公司 一种铸造组合模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020157A1 (de) * 1969-04-25 1970-10-29 Caterpillar Tractor Co Verbundmodell und Verfahren zur Herstellung von Praezisions-Sandgiessformen
FR2147163A1 (de) * 1971-07-26 1973-03-09 Caterpillar Tractor Co
DE2940171C2 (de) * 1979-10-04 1984-04-05 Goetze Ag, 5093 Burscheid Modell für die Herstellung von Gießformen
DE3602049A1 (de) * 1986-01-24 1987-07-30 Goetze Ag Modell fuer die herstellung von giessformen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3624758A (en) * 1968-07-12 1971-11-30 Caterpillar Tractor Co Method of making a sand mold with a back draft
US3773100A (en) * 1969-12-01 1973-11-20 Hooker Chemical Corp Molding box comprising pattern frame having internal lining strips
AU544242B2 (en) * 1980-10-20 1985-05-23 Deere & Company Inserting cores

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020157A1 (de) * 1969-04-25 1970-10-29 Caterpillar Tractor Co Verbundmodell und Verfahren zur Herstellung von Praezisions-Sandgiessformen
FR2147163A1 (de) * 1971-07-26 1973-03-09 Caterpillar Tractor Co
DE2940171C2 (de) * 1979-10-04 1984-04-05 Goetze Ag, 5093 Burscheid Modell für die Herstellung von Gießformen
DE3602049A1 (de) * 1986-01-24 1987-07-30 Goetze Ag Modell fuer die herstellung von giessformen

Also Published As

Publication number Publication date
ES2040482T3 (es) 1993-10-16
US4952282A (en) 1990-08-28
DE68906323D1 (de) 1993-06-09
ATE88930T1 (de) 1993-05-15
DE68906323T2 (de) 1993-08-19
FR2633851A1 (fr) 1990-01-12
FR2633851B1 (fr) 1991-05-17
EP0353119B1 (de) 1993-05-05

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