EP1422004A1 - Masselotte utilisee pour la fonderie - Google Patents
Masselotte utilisee pour la fonderie Download PDFInfo
- 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
Links
- 238000005266 casting Methods 0.000 title description 2
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000011810 insulating material Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000007711 solidification Methods 0.000 claims abstract description 3
- 230000008023 solidification Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000005465 channeling Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Images
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)
- Forklifts And Lifting Vehicles (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
- la figure 1 est une vue en coupe d'une masselotte selon la présente invention,
- la figure 2 est une vue similaire à la figure 1 illustrant une masselotte en conception série apte à être disposée à l'intérieur d'un moule équipé d'éjecteurs, et
- les figures 3 et 4 sont des vues similaires à la figure 2, illustrant respectivement une masselotte double pour l'alimentation de bossages très proches et une masselotte pourvue de deux orifices d'évacuation de l'air.
Claims (8)
- Masselotte utilisée pour la fonderie comportant une paroi périphérique délimitant une cavité interne (3) et au moins une cavité externe (4), ladite cavité interne (3) étant remplie d'une matière isolante (5) destinée à emprisonner la chaleur et à la restituer lors du refroidissement du métal logé dans la cavité externe (4), d'un couvercle (6) réalisant la fermeture de la cavité interne (3) et d'au moins un orifice (7) agencé sur le couvercle (6) qui est apte à être obstrué par une goupille d'air (8) ou un éjecteur afin d'assurer l'évacuation du gaz régnant dans la cavité externe (4) lors de la solidification du métal caractérisé en ce que ladite paroi périphérique comporte différentes épaisseurs (4a, 2a) pour permettre de canaliser le sens de l'échange thermique entre la matière isolante (5) et le métal logé dans la cavité externe (4).
- Masselotte selon la revendication 1, caractérisé en ce que lesdites différences d'épaisseur du flanc (4a) de la cavité externe (4) par rapport au flanc extérieur (2a) de la masselotte est de rapport deux tiers.
- Masselotte selon la revendication 1 ou 2, caractérisée en ce que la cavité externe (4) présente une forme sensiblement tronconique dont le sommet est tronqué.
- Masselotte selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est réalisée par mécano-soudure d'un tube cylindrique constituant le flanc extérieur (2a) de la masselotte avec l'enveloppe formant la cavité interne (3) et l'obturation de cette cavité (3) par un couvercle (6) soudé audit tube cylindrique, ladite cavité (3) étant préalablement remplie d'une matière isolante (5).
- Masselotte selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte deux cavités externes (4).
- Masselotte selon l'une quelconque des revendications précédentes, caractérisée en ce que le couvercle (6) est muni de deux orifices d'évacuation de l'air.
- Masselotte selon l'une quelconque des revendications précédentes, caractérisée en ce que la matière isolante (5) est choisie parmi les matières présentant des propriétés exothermiques dont la conductivité thermique est de l'ordre de 0,4 W/m°C.
- Masselotte selon l'une quelconque des revendications précédentes, caractérisée en ce que la paroi périphérique de la masselotte est réalisée en acier inoxydable réfractaire.
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 (fr) | 2004-05-26 |
Family
ID=32187793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03292846A Ceased EP1422004A1 (fr) | 2002-11-22 | 2003-11-18 | Masselotte utilisee pour la fonderie |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1422004A1 (fr) |
FR (1) | FR2847496B1 (fr) |
Cited By (5)
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 (fr) * | 2015-10-12 | 2017-04-20 | Faprosid S.R.L. | Manchon pour fonderies ou aciéries |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE501594A (fr) * | ||||
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 (fr) * | 1991-06-18 | 1992-12-30 | Foseco International Limited | Moule divisé verticalement avec unité de masselottage |
-
2002
- 2002-11-22 FR FR0214614A patent/FR2847496B1/fr not_active Expired - Fee Related
-
2003
- 2003-11-18 EP EP03292846A patent/EP1422004A1/fr not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE501594A (fr) * | ||||
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 (fr) * | 1991-06-18 | 1992-12-30 | Foseco International Limited | Moule divisé verticalement avec unité de masselottage |
Cited By (7)
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 (fr) * | 2015-10-12 | 2017-04-20 | Faprosid S.R.L. | Manchon pour fonderies ou aciéries |
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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