EP0341179B1 - Pièce de fonderie munie d'une partie défonçable - Google Patents

Pièce de fonderie munie d'une partie défonçable Download PDF

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Publication number
EP0341179B1
EP0341179B1 EP89470008A EP89470008A EP0341179B1 EP 0341179 B1 EP0341179 B1 EP 0341179B1 EP 89470008 A EP89470008 A EP 89470008A EP 89470008 A EP89470008 A EP 89470008A EP 0341179 B1 EP0341179 B1 EP 0341179B1
Authority
EP
European Patent Office
Prior art keywords
zone
slug
section
wall
breakable
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 - Lifetime
Application number
EP89470008A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0341179A1 (fr
Inventor
Jean-Claude Hauer
Alain Percebois
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson 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 Pont a Mousson SA filed Critical Pont a Mousson SA
Priority to AT89470008T priority Critical patent/ATE70870T1/de
Publication of EP0341179A1 publication Critical patent/EP0341179A1/fr
Application granted granted Critical
Publication of EP0341179B1 publication Critical patent/EP0341179B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings

Definitions

  • the present invention relates to foundry pieces of the type comprising a body having a wall provided with at least one pellet knockout so as to release an opening through said wall in place of said pellet.
  • the present invention aims to provide a foundry part of the type defined above better meeting those previously known to the requirements of practice, in particular in that it has a knockout pellet having on the one hand, the characteristic of being able to be released by percussion for sure, and on the other hand, the characteristic of being able to stay in place for sure.
  • the effort required to release the pellet can be known and can be calibrated to be identical on all the casting parts to be cast.
  • the production of the parts according to the invention is very simple, inexpensive, and allows parts to be obtained without waste, with great reliability and good quality.
  • the invention essentially provides a foundry piece of the type defined above, characterized in that the pellet is secured to a resistant zone of the wall of the body by means of a frangible zone surrounded by said zone. resistant, the section of this frangible zone connecting the patch to the resistant zone being substantially reduced with respect to the section of this resistant zone and with respect to the section of said patch, and in that the tablet is entirely located outside of the space defined by the two planes P 1 and P 2 between which the resistant zone is inscribed.
  • Figures 1, 2 and 3 show a foundry piece 1 comprising a body having a wall 2 provided with at least one pellet 3, knockable by percussion so as to release an opening 4 through said wall 2 in place of said patch 3.
  • the patch 3 is integral with a resistant zone 5 of the wall 2 of the body 1 by means of a frangible zone 6 surrounded by said resistant zone 5.
  • This frangible zone 6 that is to say the section connecting the patch 3 to the resistant zone 5 is substantially reduced compared to the section of the resistant zone 5 and, compared to the section of the pellet itself.
  • the patch 3 is entirely located outside the space defined by the two substantially flat surfaces P 1 and P 2 between which is the resistant zone 5.
  • the face 11 of the patch located on the side of the wall 2 is located at a distance h from the surface P 2 , of value greater than or equal to 0, whatever the mold closure faults.
  • FIG. 4 in which the same reference numerals designate the same members as in FIG. 1, shows a foundry part 1 comprising two knockouts 3, this part being represented inside its manufacturing mold 15.
  • the mold 15 comprises a lower half-part 16 and an upper half-part 17, for example removable by means of handles 18.
  • Inlets 19 are provided in the mold for casting the cast iron of the foundry piece 1.
  • the two parts of mold 16 and 17 are shaped to give the desired shape to the foundry part 1.
  • the frangible zone 6 of each pellet 3 has an external face 20 and an internal face 22, these two external faces 20 and internal 22 having a draft, or surface configuration, suitable for promoting release from the mold.
  • the foundry part has, on the side of the external face 20 of the frangible zone 6, a part in relief with a conical wall, and, on the side of the internal face 22 of the frangible zone 6, a hollow part with a conical wall, the faces 20 and 22 being parallel at least approximately.
  • the section of the frangible zone 6 remains constant, and of this fact, the properties provided by this frangible zone (possibility of releasing the pellet by percussion for sure or possibility of considering the pellet in place as an integral part of the part) remain constant.
  • FIGS. 5 and 6 in which the same reference numerals designate the same members as in FIG. 1, it can be seen that a decentering of the two half-parts of the mold does not not modify the value of the section of the frangible zone 6 whose properties remain constant.
  • the reliability of the ventilable foundry part is greater than the reliability of the ventilating foundry parts known to date, and this because of the possibilities of the tablet which either is released “reliably” or is left in place "also reliably".

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Massaging Devices (AREA)
  • Dental Preparations (AREA)
  • Piles And Underground Anchors (AREA)
  • Braking Arrangements (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Toys (AREA)
  • Thermistors And Varistors (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Adornments (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Peptides Or Proteins (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Dental Prosthetics (AREA)
EP89470008A 1988-05-05 1989-05-03 Pièce de fonderie munie d'une partie défonçable Expired - Lifetime EP0341179B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89470008T ATE70870T1 (de) 1988-05-05 1989-05-03 Gussstueck versehen mit einem zerstoerbaren teil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8806047 1988-05-05
FR8806047A FR2630942B1 (fr) 1988-05-05 1988-05-05 Piece de fonderie munie d'une pastille defoncable

Publications (2)

Publication Number Publication Date
EP0341179A1 EP0341179A1 (fr) 1989-11-08
EP0341179B1 true EP0341179B1 (fr) 1991-12-27

Family

ID=9366022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89470008A Expired - Lifetime EP0341179B1 (fr) 1988-05-05 1989-05-03 Pièce de fonderie munie d'une partie défonçable

Country Status (9)

Country Link
EP (1) EP0341179B1 (no)
AT (1) ATE70870T1 (no)
DE (1) DE68900596D1 (no)
DK (1) DK172195B1 (no)
ES (1) ES2024392T3 (no)
FR (1) FR2630942B1 (no)
GR (1) GR3003446T3 (no)
NO (1) NO170200C (no)
PT (1) PT90442B (no)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT234061B (de) * 1962-08-20 1964-06-10 Kaiserslautern Guss Armatur Aus Gußeisen bestehender deckelartiger Verschlußkörper für Schachtöffnungen
DE7800397U1 (de) * 1978-01-07 1978-05-03 Passavant-Werke Michelbacher Huette, 6209 Aarbergen Deckel fuer schachtabdeckungen
CY1267A (en) * 1980-10-27 1984-11-23 Dover Eng Works Ltd Manufacturing manhole cover frames

Also Published As

Publication number Publication date
FR2630942A1 (fr) 1989-11-10
ES2024392T3 (es) 1992-08-16
NO891807D0 (no) 1989-05-02
FR2630942B1 (fr) 1991-04-05
PT90442B (pt) 1994-05-31
EP0341179A1 (fr) 1989-11-08
PT90442A (pt) 1989-11-30
ATE70870T1 (de) 1992-01-15
DK214789A (da) 1989-11-06
NO170200B (no) 1992-06-15
ES2024392A4 (es) 1992-03-01
GR3003446T3 (en) 1993-02-17
NO891807L (no) 1989-11-06
DE68900596D1 (de) 1992-02-06
DK172195B1 (da) 1997-12-22
DK214789D0 (da) 1989-05-02
NO170200C (no) 1992-09-23

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