EP1422004A1 - Speiser für die Verwendung beim Giessen - Google Patents

Speiser für die Verwendung beim Giessen Download PDF

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Publication number
EP1422004A1
EP1422004A1 EP03292846A EP03292846A EP1422004A1 EP 1422004 A1 EP1422004 A1 EP 1422004A1 EP 03292846 A EP03292846 A EP 03292846A EP 03292846 A EP03292846 A EP 03292846A EP 1422004 A1 EP1422004 A1 EP 1422004A1
Authority
EP
European Patent Office
Prior art keywords
cavity
external
counterweight
insulating material
cover
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.)
Ceased
Application number
EP03292846A
Other languages
English (en)
French (fr)
Inventor
Gilles Rabiniaux
Serge Noizet
Yvan Martin
Bruno Demoulin
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles 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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1422004A1 publication Critical patent/EP1422004A1/de
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088—Feeder heads

Definitions

  • the present invention relates to an improvement in the design and the realization of the weights used in foundry.
  • weights are small additional tanks fixed to the mold, in a desired number and whose purpose is to supply one or more hot spots in the part being solidified which could be "Compacted" under the effect of the contraction of the metal.
  • the object of the invention is to provide a flyweight of good performance economical and simple to carry out compared to the known flyweights this day.
  • the present invention relates to a flyweight used for the foundry, characterized in that it is composed of a peripheral wall comprising different thicknesses delimiting an internal cavity and at least one external cavity, said internal cavity being filled with an insulating material intended to trap the heat and to restore it during the cooling of the housed metal in the external cavity, with a cover closing the internal cavity and at least one orifice arranged on the cover which is capable of being obstructed by an air pin or an ejector to ensure the evacuation of the gas prevailing in the external cavity when the metal solidifies.
  • the cavity external has a substantially frustoconical shape whose apex is truncated.
  • the counterweight is produced by mechanical welding of a cylindrical tube constituting the external sides of the counterweight with the envelope forming the internal cavity and closing this cavity by a cover welded to said cylindrical tube, said cavity being previously filled with an insulating material.
  • said flyweight has two external cavities.
  • the cover is provided with two air exhaust ports.
  • the insulating material is chosen from among the materials having exothermic properties with a thermal conductivity of around 0.4 W / m ° C.
  • the wall device of the counterweight is made of refractory stainless steel.
  • This flyweight 1 is advantageously composed of a wall peripheral 2 having different thicknesses delimiting an internal cavity 3 and an external cavity 4, said internal cavity 3 being filled with a material insulator 5 designed to trap heat and restore it during cooling of the metal housed in the external cavity 4, of a cover 6 making closing the internal cavity 3 and an orifice 7 arranged in the center of the counterweight which is obstructed by an air pin 8 in order to ensure the evacuation of the gas prevailing inside the external cavity 4 during the solidification of the metal.
  • the external cavity 4 intended to receive the metal has a substantially frustoconical shape whose top is truncated, such a shape makes it possible to divide by half the setting with the mile compared to a counterweight classic cylindrical.
  • flanks 4a of the external cavity are inclined at an angle between 80 and 95 degrees by relation to the base plane P of the truncated cone.
  • this external cavity 4 also designated “Hood” advantageously have a thickness of approximately 2 mm in order to ensure good heat exchange and thus keep the module cooling required.
  • the outer sides 2a of the counterweight according to the invention have a thickness of approximately 3 mm. This increase in thickness by compared to the wall of the "hood” allows to channel the direction of the exchange thermal between the insulating material 5 of the counterweight and the metal housed in the external cavity 4.
  • the elements used in the composition of the wall of the weights which are determined according to the desired thermal gradient and of the thermal saturation and cooling curve of the elements can advantageously be made of sintered elements (copper, bronze having different densities) or an insulating product replacing asbestos (Kerlane®) or refractory stainless steel.
  • the insulating material integrated in the counterweight has advantageously exothermic properties including thermal conductivity is very low, for example at 600 degrees Celsius the thermal conductivity is around 0.4 W / m ° C.
  • the cover 6 of the counterweight is fixedly connected, in particular by a weld bead, to the peripheral wall in order to obstruct said internal cavity.
  • the air pin 8 is movable inside the counterweight.
  • the weights according to the invention are introduced into the mold of the part to be produced.
  • the tanks thus created by the metal housed in the external cavity of the flyweight allow to ensure slow cooling compared to the rest of the part to be produced by the exothermic reaction due to the presence of the insulating material transferring its heat to the metal, to the particular shape of this cavity and to the material used for the realization of the wall of the counterweight. This ensures a good displacement of the shrinkage at the tank.
  • the gas evacuation pin allows elimination progressive of the gases outside the mold, by displacement of the pin under the pressure of the gas prevailing in said external cavity while avoiding the formation of a solidified crust which would be in contact with the atmosphere resulting in a loss of material in the tank.
  • FIG. 2 shows an alternative embodiment of a counterweight according to the invention intended to equip the mass production of parts by molds with ejectors.
  • This flyweight is then provided with a cover 6 extended vertically by a cylindrical tube intended to receive a ejector.
  • This ejector thus ensuring the function of the air pin during metal feed. Furthermore, said ejector is able to pass through said counterweight during the ejection phase of the mold part.
  • said feeder has a double tank for feeding very bosses close to each other; each of these tanks being arranged so identical to that described above and being provided with an air exhaust as visible in figure 3.
  • said flyweight can comprise, according to a alternative embodiment shown in Figure 4, a double exhaust air especially for making large bosses.
  • the flyweight according to the invention is relatively simple to carry out and allows savings sensitive metal used. Furthermore, such a flyweight does not need to be completely covered with molding sand resulting in a reduction on working time and on the weight of molding sand. Furthermore, said weights according to the invention can be used in tilted casting and be used both at the top and at the bottom of the mold.
  • this flyweight is suitable for all alloys without exception.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP03292846A 2002-11-22 2003-11-18 Speiser für die Verwendung beim Giessen Ceased EP1422004A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0214614A FR2847496B1 (fr) 2002-11-22 2002-11-22 Masselotte utilisee pour la fonderie
FR0214614 2002-11-22

Publications (1)

Publication Number Publication Date
EP1422004A1 true EP1422004A1 (de) 2004-05-26

Family

ID=32187793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292846A Ceased EP1422004A1 (de) 2002-11-22 2003-11-18 Speiser für die Verwendung beim Giessen

Country Status (2)

Country Link
EP (1) EP1422004A1 (de)
FR (1) FR2847496B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154597A1 (it) * 2015-10-12 2017-04-12 Faprosid S R L Manicotto per fonderia o acciaieria
WO2017064592A1 (en) * 2015-10-12 2017-04-20 Faprosid S.R.L. Sleeve for foundries or steel plants
CN110303119A (zh) * 2019-07-16 2019-10-08 无锡市蠡湖铸业有限公司 一种带耐高温安全阀的浇冒口罩
CN113369442A (zh) * 2021-05-25 2021-09-10 庆铃汽车（集团）有限公司 用于铸件内部缺陷改善的注射冒口及冒口装置
CN117282922A (zh) * 2023-09-23 2023-12-26 河北北方铸业有限公司 一种铸件非接触热补贴的工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE501594A (de) *
US3566952A (en) * 1967-10-26 1971-03-02 Wyman Curtis Lane Pressure feeding of casting using a feeder head
DE2055239A1 (en) * 1970-11-10 1972-05-18 Baur, Eduard, Dipl.-Ing., 5256 Waldbruch Casting mould feeder funnel insert - with insulating lining
EP0520630A1 (de) * 1991-06-18 1992-12-30 Foseco International Limited Vertikal geteilte Form mit Speiser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE501594A (de) *
US3566952A (en) * 1967-10-26 1971-03-02 Wyman Curtis Lane Pressure feeding of casting using a feeder head
DE2055239A1 (en) * 1970-11-10 1972-05-18 Baur, Eduard, Dipl.-Ing., 5256 Waldbruch Casting mould feeder funnel insert - with insulating lining
EP0520630A1 (de) * 1991-06-18 1992-12-30 Foseco International Limited Vertikal geteilte Form mit Speiser

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154597A1 (it) * 2015-10-12 2017-04-12 Faprosid S R L Manicotto per fonderia o acciaieria
WO2017064592A1 (en) * 2015-10-12 2017-04-20 Faprosid S.R.L. Sleeve for foundries or steel plants
CN110303119A (zh) * 2019-07-16 2019-10-08 无锡市蠡湖铸业有限公司 一种带耐高温安全阀的浇冒口罩
CN113369442A (zh) * 2021-05-25 2021-09-10 庆铃汽车（集团）有限公司 用于铸件内部缺陷改善的注射冒口及冒口装置
CN113369442B (zh) * 2021-05-25 2022-11-04 庆铃汽车（集团）有限公司 用于铸件内部缺陷改善的注射冒口及冒口装置
CN117282922A (zh) * 2023-09-23 2023-12-26 河北北方铸业有限公司 一种铸件非接触热补贴的工艺
CN117282922B (zh) * 2023-09-23 2024-04-26 河北北方铸业有限公司 一种铸件非接触热补贴的工艺

Also Published As

Publication number Publication date
FR2847496A1 (fr) 2004-05-28
FR2847496B1 (fr) 2005-08-12

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