EP0340367A1 - Système d'alimentation du moule dans une fonderie - Google Patents
Système d'alimentation du moule dans une fonderie Download PDFInfo
- Publication number
- EP0340367A1 EP0340367A1 EP88401113A EP88401113A EP0340367A1 EP 0340367 A1 EP0340367 A1 EP 0340367A1 EP 88401113 A EP88401113 A EP 88401113A EP 88401113 A EP88401113 A EP 88401113A EP 0340367 A1 EP0340367 A1 EP 0340367A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- conduit
- skin
- strainer
- mold
- 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
Links
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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
Definitions
- a skin-strainer 2 may be located along the bottom or side surfaces of the mold casting cavity, the most natural and advantageous location is the surface of the casting cavity 1 which is on top when the mold is in pouring position.
- the skin-strainer 2 is firmly held in position at the lower end of the sprue-feeder 5 using retaining means 7 embedded in the top of part 8 of the mold.
- the top of part 8 of the mold is made of bonded sand
- the skin-strainer 2 is ceramic
- the retaining means 7 is metallic.
- Other materials may be used, provided the refractoriness of those materials is compatible with the temperature of the metal being poured.
- the casting surface i.e., the surface of the mold casting cavity
- the restraining means may be made when also using the restraining means according to the current invention. Examples of such modifications are illustrated in Figures 2 and 3.
- An “inclusion” is a particle of impurity, usually non-metallic and not dissolved in the molten metal.
- An impurity is generally lighter than the metal and is desirably separated from the metal before the metal reaches the mold casting cavity.
- a "sprue-feeder” is a conduit acting both as a sprue and as a feeder. Previously, a sprue-feeder has been considered unsuitable for producing a good quality casting. However, a good quality casting may be made using a sprue-feeder as disclosed herein.
- Refractory materials When a metal having a low melting point is being poured, a wide variety of materials exhibit refractoriness, including other metals having higher melting points. As the melting point of the metal being poured increases, the range of materials exhibiting refractoriness is reduced and may ultimately include only some metals properly protected with an adequate refractory wash or one of those materials usually referred to as "refractory materials" or just ceramics, including all solid industrial materials that are neither metallic nor organic, which are highly heat resistant and have low thermal conductivity, whether in a granulated or powdered form. Refractory materials may be given many different shapes by using a bond that may be mechanical, physical, chemical, sintered, a combination of the above, or any other type of bond.
- molten metal is poured either into the enlargement 16, or directly into sprue-feeder 5, quickly enough to choke the sprue-feeder.
- the first metal begins to pass through apertures 6 into cavity 1.
- the skin-strainer cover is lifted and removed from the sprue-feeder.
- pouring is increased in order to keep the sprue-feeder 5 choked.
- the pouring continues until the molten metal starts rising, thereby indicating that the mold casting cavity is full. Pouring is then stopped.
- the necessary difference of metal is added.
- Collar 52 is formed of a material much less resistant to the forces it will encounter than prefabricated skin-strainer 2 which, depending upon its size and on the metal poured, is typically made of ceramic, metal or a combination of the two. Accordingly, in the embodiment of Figure 15, the collar 52 must be made sufficiently resistant and therefore is thicker than a skin-strainer and is provided with slope 56 and radius 57. However, the thicker sprue-feeder collar 52 is less advantageous for proper feeding of the casting once the mold is poured and the metal still liquid. To compensate, the aperture 53 is typically larger than that found in an embodiment such as Figure 14.
- the passage 29 still retains its other advantages of facilitating choking of the sprue-feeder during pouring and further provides for easier fettling (for example, the type of metal and casting shape may allow for a sprue-feeder that can be knocked off more easily).
- the level of bottom 64 at least where that bottom is adjacent to the opening 53, is elevated above the level of the top 3 of the mold casting cavity by a distance 63, which nevertheless can be made as small as desired. Therefore, the distance 63 corresponds to the vertical dimension of an aperture 53 (or an aperture 12 in the preceding embodiments), communicating sprue-feeder 5 and mold casting cavity 1 through a single aperture. In such a case, a collar with a height equivalent to distance 63 is naturally formed.
- a skin-strainer also may be used having a thickness corresponding to the distance 63 for further reducing contact of the sprue-feeder with the cavity.
- FIG 19 there is shown one example of a generic case in which a sprue-feeder terminates at a skin-strainer 2 having one or plural apertures (or, in the alternative, at a collar 52, or still without any straining means at all and in which straining means 2′ are disposed at one or even several additional locations along the length of the sprue-feeder.
- One such possible additional upstream location is the top surface 4 of the mold, as shown in Figure 19.
- Surface 4 may be considered in this regard as analogous to the mold casting cavity surface to which the skin-strainer or collar concepts also can be applied, and consequently, the concept of restraining means.
- the sprue-feeder is separated into two parts 5′ and 5 ⁇ by a second strainer 2′ located at surface 4, sprue-feeder part 5′ being located adjacent cavity 1 and sprue-feeder part 5 ⁇ being disposed above strainer 2′.
- the strainer 2′ is shown in combination with a further embodiment of a restraining floating piece 40 and a cover 11.
- restraining floating piece 40 is shown elevated slightly above the position at which it will reside during pouring. This embodiment of restraining floating piece 40 has some variations of shape when compared with that of Figure 13. Before pouring, surface 42 will rest on surface 34 for supporting the restraining floating piece 40.
- non-metallic casting materials such as polymers have been and are being developed, and their study is being included in programs of metallurgical engineering. Foundry technology can be applied to those materials, and foundry vocabulary can be used by extension or analogy when referring to them.
- the invention herein disclosed also can be applied to such non-metallic casting materials, either to control only the cavity filling or to control both the cavity filling and the corresponding casting feeding, whether or not the material exhibits solidification shrinkage.
- porous ceramic is available and that, when in contact with molten metal, such porous ceramic allows for the molten metal to go through the porous material, which material can be called metal-permeable material, it is possible to take advantage of this property for designing and manufacturing restraining means according to the current invention.
- restraining means will restrain the flow of metal toward the cavity but will not block it completely.
- a blind restraining floating piece like or similar to the one shown in Figure 20 is made of a porous ceramic material, it will not be blind any more. It will, instead, allow molten metal to pass toward the cavity and still, if conveniently shaped, it will float once the cavity is full.
- Figure 20 which and as already explained in this specification is used with a strainer having at least two apertures, corresponds to a system presenting two different open areas: one for choking and filling and the other for feeding. It could also correspond to a system presenting three different open areas by associating a cover to the strainer open area not blocked by blind restraining floating means: one area for choking (which eventually can be zero), a bigger one for filling and the biggest for feeding.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Mold Materials And Core Materials (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19880401113 EP0340367B1 (fr) | 1988-05-06 | 1988-05-06 | Système d'alimentation du moule dans une fonderie |
| DE19883872873 DE3872873T2 (de) | 1988-05-06 | 1988-05-06 | Giesserei-anschnitt-system. |
| ES88401113T ES2034299T3 (es) | 1988-05-06 | 1988-05-06 | Sistema de llenado de molde de fundicion. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19880401113 EP0340367B1 (fr) | 1988-05-06 | 1988-05-06 | Système d'alimentation du moule dans une fonderie |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0340367A1 true EP0340367A1 (fr) | 1989-11-08 |
| EP0340367B1 EP0340367B1 (fr) | 1992-07-15 |
Family
ID=8200386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19880401113 Expired EP0340367B1 (fr) | 1988-05-06 | 1988-05-06 | Système d'alimentation du moule dans une fonderie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0340367B1 (fr) |
| DE (1) | DE3872873T2 (fr) |
| ES (1) | ES2034299T3 (fr) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719221A (zh) * | 2020-12-29 | 2021-04-30 | 太原科技大学 | 一种可变径浇口装置 |
| CN112935191A (zh) * | 2021-01-28 | 2021-06-11 | 共享装备股份有限公司 | 一种出气冒口 |
| CN113857434A (zh) * | 2021-10-26 | 2021-12-31 | 宜宾普什联动科技有限公司 | 金属阻隔片浇口盆装置 |
| CN116237493A (zh) * | 2023-02-27 | 2023-06-09 | 山西平阳重工机械有限责任公司 | 薄壁壳体的防变形制造方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1457437A (en) * | 1972-12-22 | 1976-12-01 | Caterpillar Tractor Co | Casting |
| DE2528844B2 (de) * | 1975-06-27 | 1977-06-23 | Hitachi Metals, Ltd., Tokio | Verfahren zum giessen mehrerer gusserzeugnisse |
| US4154289A (en) * | 1976-04-06 | 1979-05-15 | Marie-Therese Simian | Gating system |
| GB2047139A (en) * | 1979-04-20 | 1980-11-26 | Jeanneret M | A mould gating system |
-
1988
- 1988-05-06 ES ES88401113T patent/ES2034299T3/es not_active Expired - Lifetime
- 1988-05-06 EP EP19880401113 patent/EP0340367B1/fr not_active Expired
- 1988-05-06 DE DE19883872873 patent/DE3872873T2/de not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1457437A (en) * | 1972-12-22 | 1976-12-01 | Caterpillar Tractor Co | Casting |
| DE2528844B2 (de) * | 1975-06-27 | 1977-06-23 | Hitachi Metals, Ltd., Tokio | Verfahren zum giessen mehrerer gusserzeugnisse |
| US4154289A (en) * | 1976-04-06 | 1979-05-15 | Marie-Therese Simian | Gating system |
| GB2047139A (en) * | 1979-04-20 | 1980-11-26 | Jeanneret M | A mould gating system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719221A (zh) * | 2020-12-29 | 2021-04-30 | 太原科技大学 | 一种可变径浇口装置 |
| CN112935191A (zh) * | 2021-01-28 | 2021-06-11 | 共享装备股份有限公司 | 一种出气冒口 |
| CN112935191B (zh) * | 2021-01-28 | 2023-03-03 | 共享装备股份有限公司 | 一种出气冒口 |
| CN113857434A (zh) * | 2021-10-26 | 2021-12-31 | 宜宾普什联动科技有限公司 | 金属阻隔片浇口盆装置 |
| CN116237493A (zh) * | 2023-02-27 | 2023-06-09 | 山西平阳重工机械有限责任公司 | 薄壁壳体的防变形制造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2034299T3 (es) | 1993-04-01 |
| DE3872873D1 (de) | 1992-08-20 |
| DE3872873T2 (de) | 1993-03-04 |
| EP0340367B1 (fr) | 1992-07-15 |
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