CN207941942U - A kind of filter device for being used in casting molten metal technique - Google Patents

Abstract

The utility model discloses a kind of filter devices for being used in casting molten metal technique.The device includes bottom, top and therebetween continuous side walls.Bottom, top and side wall define chamber comprising central inlet cavity, the entrance for introducing inlet chamber, multiple outlets and multiple filters for filtering molten metal.Filter is arranged in flow path between the inlet.Each outlet is located in the closing outlet plenum body limited by a part for a pair of of filter and side wall.Filter extends internally from side wall and extends from bottom to top.Adjacent outlet cavity is separated from one another by the access road extended between inlet chamber and side wall.

Description

A kind of filter device for being used in casting molten metal technique

Technical field

The utility model is related to a kind of devices for being used during casting molten metal.Particularly, this practicality It is novel to be related to a kind of device for motlten metal stream to be filtered and distributed in casting process.

Background technology

The manufacture of band large-scale metal casting may be relatively difficult.In order to ensure providing sufficient melting to each of mold part Metal, using running gate system molten metal to be assigned to the different zones of mold by runner.

Filter is commonly used in metal casting, to remove the slag or dross in molten metal, and reaches mold in metal Turbulent flow is reduced before.It reduce the levels of field trash and defect in casting finished products, scrap horizontal, reduction weight to reduce The cleannes and quality done (rework), improve machining property and single-casting.In filter process, field trash is removed simultaneously It is trapped in before filter, which limit can pass through the amount of the metal of filter.Under normal circumstances, one square centimeter Filter can filter 2.1-2.8 kilograms of steel or 1.4-2.0 kilograms of spheroidal graphite cast-iron, and if attempt to be put into more Metal will lead to plugged filter (since captured field trash blocks or blocks filter).

For medium-sized and band large-scale metal casting, multiple filters are needed to ensure enough yield.Under normal circumstances, mistake Filter is in flow passage system (runner system), by series connection (in-line) in the preforming cavity of the mold of each runner It provides.For heavier casting, filter is generally positioned in fire resisting shell, is such as used in ceramic flow passage system Foseco companies These units are usually located in mold, in the lower section of casting cavity, and even It is connected to the cast gate (in-gate) positioned at casting suitable position.

Increase with the weight of casting, the requirement of filter means to designing the practical flow passage system suitable for a mold Become to become increasingly complex and difficult.For example, one 20 tons of steel casting will need 30 to 40 150mm²Filter.For Overcome the problems, such as this, such as the centrifugal filtration system described in DE4229417C2 and the quotient sold by Foseco companies The name of an article is known as the centrifugal filtration system of HOLLOTEX CFU and contains iron castings commonly used in large-scale.The filter device of these ability The large-scale refractory material unit that can accommodate 6 to 8 filters in a circular form including one.One or more units are incorporated into The flow passage system of casting (being typically the casting of underfill).Molten metal enters unit, and initially in filter surrounding loop, Then metal will be guided by centrifugation by filter and be left by the outlet at the center positioned at unit, be poured by one or more Mouthful and enter casting cavity.According to the requirement of casting weight and metal volume, one or more of these units can be used. However, these units are large-scale and weight, it means that they are difficult to be handled and manipulated during molding, and they and its Associated flow passage system together, occupies many spaces in a mold.

In view of these problems, the utility model is designed to provide a kind of compact filter with high filtration capacity Shell, and especially suitable for medium and big size effective filtering containing iron castings.

Utility model content

It is according to the present utility model in a first aspect, providing a kind of dress for being used during casting molten metal It sets, device includes：

Bottom, top and continuous side walls therebetween, bottom, top and side wall limit include central inlet cavity chamber；

Entrance introduces inlet chamber；

Multiple outlets；And

For multiple filters of filtering molten metal, filter is arranged flow path between the inlet It is interior,

Wherein：

Each outlet is located in the closed outlet plenum body limited by a part for a pair of of filter and side wall；

Filter extends internally from side wall and extends from bottom to top；And

Adjacent outlet cavity is separated from each other by the access road extended between inlet chamber and side wall.

It should be understood that term " closed outlet cavity " is intended to indicate that rest part of the outlet cavity relative to chamber It is closed, so that in use, when molten metal is flowed to from entrance to be exported, molten metal must pass through filter.So And, it is to be understood that outlet cavity is not to be completely sealed, and is led to after filtering this is because it includes molten metal Cross the outlet (as described below) of its bleeder.

In use, device receives molten metal supply, which is filtered in the device, then by it is multiple go out Mouth is assigned to the different piece of casting, and middle outlet may be connected to single runner or cast gate.Molten metal is flowed by entrance The central inlet cavity of device is directed into outlet cavity then along access road and by filter outward.Once by mistake Filter, molten metal is by exporting bleeder.

Filter extends internally from side wall.Therefore, each filter has the inner end far from side wall and close to inlet chamber With the outer end far from inlet chamber and by proximal wall.

In some embodiments, filter is arranged radially at around inlet chamber.Radial arrangement is advantageous, because its More filters and more outlet cavitys can be made to fit in device.Therefore, radial design allows device to compare It is compacter.Compact design helps to mitigate weight, to help to handle the unit and improve the perfusion of the unit, and also allows Molding sand is more easily packaged in around device.

Radial design additionally provides higher filter capacity and efficiency.It is believed that flowing " the punching that molten metal passes through filter Wash " surface of filter to hinder the accumulation of field trash delayed obstruction and the blocking of filter, to allow more A large amount of metal passes through filter.

It is appreciated that in the wherein embodiment of filter radial arrangement, the outlet cavity of adjacent outlets cavity is detached To therefore have radial arrangement with access road.

In one embodiment, top or bottom are removable.This means that the inside of device can be accessed with Allow filter to be inserted into when device is assembled, or allows the inside for cleaning the unit before molding.

Therefore bottom and top can be connected to each other.Bottom and top can connect by any suitable means, all Such as friction fit passes through adhesive.Additionally or alternatively, bottom and top can by one or more external fastenings, Such as belt (typically metal tape), is held togather.

In some embodiments, entrance is located in bottom.In some alternative embodiments, entrance is located in top.

In some embodiments, outlet is located in bottom.In some alternative embodiments, outlet is located in side wall. In some further alternate embodiments, some outlets are located in bottom, some are located in side wall.

Molten metal can be flowed by the entrance in bottom, and be flowed out by the outlet in bottom.Alternatively, metal can be with It is flowed by the entrance in bottom, and is flowed out by the outlet in side wall.Alternatively, metal can pass through the entrance stream on top Enter, and is flowed out by the outlet on side wall.Metal can also be flowed out by the outlet in bottom and side wall.In addition to this, entrance Position with outlet is by the size and shape depending on casting, and the stream for supplying filtering metal to the different piece of casting Road system it is appropriately configured.

At least one entrance can be provided.In the case where to filter and distribute a large amount of molten metals, which can wrap Additional entrance is included, wherein each entrance introduces central inlet cavity.In some embodiments, device includes 1 to 4 Entrance.In some embodiments, device includes 1,2,3 or 4 entrance.

In some embodiments, device includes 3 to 12 outlets.In some embodiments, device include 3,4 A, 5,6,7,8,9,10,11 or 12 outlets.In some embodiments, each outlet cavity includes One outlet, so that the quantity of outlet cavity is equal to the quantity of outlet.In some alternative embodiments, cavity is each exported It is exported including 2 to 4, so that the quantity of outlet is more than the quantity of outlet cavity.In one embodiment, each go out Oral cavity body includes 2,3 or 4 outlets.It is limited by a pair of of filter due to each outlet cavity portion, filter Quantity can be equal to outlet twice of number of cavities.

In some embodiments, the sidewall sections for limiting each outlet cavity include radially inwardly projecting region (i.e. Protrusion), which is configured to guide motlten metal stream into outlet.Side wall in each access road can with or alternatively wrap Protrusion is included, is configured to guide metal stream from inlet chamber towards the filter for limiting outlet plenum body.Export cavity and/or Protrusion in access road reduces turbulent flow and metal is enable more effectively to flow through device, to improve filter capacity. In one embodiment, protrusion extends between the top and the bottom.

Protrusion extends in outlet cavity and/or access road.Protrusion can be formed by the inwardly projecting portion of side wall (i.e. so that recess is formed in the outer surface of device).Alternatively, protrusion can be the form of insertion piece, it is connected to side wall Inner surface is integrally formed with side wall so that protrusion is effectively formed the increased region of sidewall thickness.In this case, it dashes forward Convenient position can be provided and be inserted into screw, push-in matching connector or for top and/or bottom to be anchored to side wall Other devices.

Protrusion can have two sides that bottom is connected in top end with the cross section of triangle, the triangle, Bottom is connected to side wall, and motlten metal stream is guided in top bifurcated and along the both sides of triangle.The top of triangle End can be fillet, so that protrusion has the shape of bending.Alternatively, protrusion can have semicircular cross section, semicircle Arc with bottom and bending, the bottom of wherein semicircle are connected to side wall.It will be understood by those skilled in the art that the shape of protrusion is not It is limited to these examples, and protrusion can be suitable for any shape for reducing turbulent flow and molten metal being guided to flow.

In some embodiments, device further comprises multiple support elements, support element around the edge of inlet chamber with Construction spaced apart is arranged and extends to top from bottom, wherein each pair of filter is between side wall and one of support element Extend.

In some embodiments, each support element is the form of partition wall (i.e. separator), with a pair of of filter The 4th wall of outlet cavity is together defined with side wall.The use of separator allows filter to be more spaced apart, and with increasing The capacity of oral cavity body.The setting of support element or separator also assures that molten metal will not leak between filter, and necessary Enter outlet cavity via access road (rather than directly from inlet chamber), this ensures molten metal quilt before separating device Filtering.

Support element or separator can also be used to filter being held in place.In some embodiments, each The inner end of filter is located in the respective slots in support element or separator.By the way that the inner end of each filter is located in slit Interior, filter is kept on both faces, to prevent transverse shifting or the inclination of filter.It should be appreciated that due to each pair of Filter provides a support element or separator, therefore each support element or separator will be equipped with a pair of of slit, be used to accommodate The inner end to filter.

The outer end of each filter can alternatively, or in addition be located in the slit of side wall.

In some embodiments, it is arranged in the bottom and/or top of device for receiving the slit of each filter In, filter is maintained in slit.Filter is located in the slit at bottom and/or top and can further be consolidated filter Determine in position, and helps to prevent the transverse shifting of filter (even if any one end in filter is not kept It is also such in the embodiment of the slit in slit and/or side wall in support element).It is used in bottom and/or top narrow Slot also supports filter to resist the physical impact of motlten metal stream and the possibility of filter breaks is made to minimize.

Filter can closely (i.e. frictional fit) be assemblied in slit, to prevent the transverse shifting of filter.It should manage Solution, the size and shape of slit will be configured as it is corresponding with the size and shape of filter, to ensure to be fitted close.It is logical It crosses and filter is simply slid into slit, easily filter can be assembled in device, without any additional work Filter is secured in place by tool.

Term " slit " used herein above will be understood to refer to have bottom and the channel of two side walls.The bottom of slit Portion and side wall are preferably flat, and side wall is perpendicular to bottom, so as to closely match with the square rim or end of filter It closes.Slit thus provide with the contact in two faces of filter and provide and be located in filter in slit edge or The contact of end.

In addition to filter is firmly fixed it is in place other than, slit, side wall in support element or separator, top And/or bottom can provide and prevent the sealing of metal shunt from (preventing some metals not by filter but passing through filter edges Leakage of the gap of surrounding under filtered).If (this will cause along filter filter outline low dip in use The significant gap that edge opens), this will be especially important.

In some embodiments, each filter is supported between a pair of of flank column.In some embodiments, side Cabane is extended vertically from bottom.In some embodiments, flank column extends to top from bottom.Flank column can filter It is directly opposite on the either side of device, or be offset from one another with different distances along the longitudinal axis of filter.Implement at one In mode, between side wall and inlet chamber at approximately half of distance, i.e., flank column is located in along the longitudinal axis of filter Centre about between the outer end of filter and inner end, the intermediate region of neighbor filter.Flank column is used for filter jail Admittedly be held in place and prevent its inclination, and do not set on top, bottom, separator and/or side wall especially It sets in the embodiment of slit, the bending or potential damaged of filter is prevented when filter is exposed to motlten metal stream.It is excellent The width of selection of land, flank column is sufficiently large to provide enough supports, and filter is maintained at stand up position without tilting, but its Width is not too large and molten metal is hindered to flow through filter.

Filter can have any suitable size and shape, and it is to be understood that those skilled in the art is by root Suitable filter size is selected according to the size and shape of device and the arrangement of filter.In some embodiments, mistake Filter is rectangle or rectangular.

In some embodiments, each filter is made of the filter cell of two end-to-end arrangements.When needing phase When to larger elongate rectangular filter, it may be particularly useful, and single-piece to form filter by two filter elements Filter may be difficult to manufacture or may not have enough intensity to bear big motlten metal stream.Two filter elements can With end-to-end link, wherein the tie point is located between a pair of of flank column.

In some embodiments, at the top of device include groove for accommodating regulus.It is present in molten metal Any slag all will not be by filter, and the top of metal stream can be increased to.One receiving slag is set at the top of device Groove, prevent slag from being accumulated during metal flow and blocking filter.

In one embodiment, which there is the cross section of substantial circular, side wall to limit circular circumference.

The pressure that the uses when device can be by that can bear the temperature of casting molten metal and compress around mold sand Any suitable refractory material of power is formed.Suitable material includes that vitreous silica, precast concrete, fire clay, chemistry are viscous Close the refractory material and/or fiber of sand and chemical adhesion.In some embodiments, which is alumina-based cements cast Material.In some embodiments, which is the composition of the slurry formation of cohesive refractory material and fiber.

Any conventional filters suitable for filtering molten metal may be used in the device.In some embodiments, mistake Filter is foam filter.In some embodiments, filter is the honeycomb filter for squeezing or suppressing.Suitable foam Filter includes ceramic foam filter, carbon such as in EP0412673B1 and those of described in reference paper therein SiClx-alumina filter, and such as by WH Sutton, JC Palmer, JR Morris：" it is being used for filtering high temperature alloy Ceramic foam material exploitation ", the zirconia filters described in AFS Transactions, p339 (1985), Yi Jiru Carbon combined filtering device those of described in WO02/18075.

In some embodiments, filter is the filter that carbon combines.

It should be understood that unless otherwise specified, the embodiment of the utility model as described herein can be to appoint What mode combines.

Description of the drawings

The embodiment of the utility model is described with reference to the drawings, wherein：

Fig. 1 a are the cross-sectional views according to the device of an embodiment of the utility model first aspect.

Fig. 1 b are the cross-sectional views of the device of Fig. 1 a of not filter.

Fig. 1 c are the perspective views of a part for casting system comprising the device of Fig. 1 a and a part for flow passage system and A part for windmill type hub cast.

Fig. 2 a are the top perspectives of casting system comprising according to the utility model first aspect embodiment Device and flow passage system a part and gyratory crusher casting.

Fig. 2 b are the bottom perspective views of casting system shown in Fig. 2 a.

Specific implementation mode

Fig. 1 a are shown according to the embodiment of the utility model first aspect in casting molten metal technique The device 100 used.Device 100 includes bottom 2, top (not shown) and continuous side walls 4 therebetween.Bottom 2, top and Side wall 4 collectively defines the inner cavity for including central inlet cavity 6.Device 100 further includes the entrance 8, Yi Jiduo being introduced into cavity 6 A outlet 10.

Multiple filters 12 for filtering molten metal are disposed in the flow path between entrance 8 and outlet 10 It is interior, so that in use, when molten metal is from the flow direction of entrance 8 outlet 10, molten metal is filtered.Each outlet 10 is located at It is limited in the outlet cavity 14 between a pair of of filter 12 and a part for side wall 4.Filter 12 from side wall 4 extend and Shown in arranged radially around inlet chamber 6 in embodiment.Adjacent outlet cavity 14 passes through in inlet chamber 6 and side wall The access road 16 that extends between 4 part and be separated from each other.

There is the cross section of substantial circular, wherein side wall 4 to limit circular circle for device 100 and the chamber being limited in it Week.Inlet chamber 6 is located at circular center, and entrance 8 is located in inlet chamber 6 and in bottom 2.Inlet chamber 6 itself be also It is circular, and filter 12 is radially disposed in the form of outer shroud around inlet chamber 6.Access road 16 and outlet cavity 14 Form the section of outer shroud comprising six access roades 16 and six outlet cavitys 14.Exporting cavity 14 has than access road 16 Smaller volume, because a part of available space in these sections is occupied by filter 12.Depending on device 100 and casting Size and property, device may include any appropriate number of outlet cavity 14 and access road 16.However, access road 16 Quantity should preferably equivalent to export cavity 14 quantity so that access road 16 and outlet cavity 14 around outer shroud friendship It replaces, and molten metal enters outlet cavity 14 from both sides.

In the embodiment shown, device 100 further includes the support element or separator 18 of partition wall form, is surrounded The edge of inlet chamber 6 is arranged with construction spaced apart.(not shown) in alternative embodiments, support element can be columns Form rather than the form of partition wall.Column may be useful, for example, in the more limited smaller device of volume of inner cavity chamber In.Filter 12 extends between separator 18 and side wall 4, defines therebetween outlet cavity 14.

Side wall includes the radially inwardly projecting region (or protrusion) 20,21 being integrally formed with side wall.Protrusion 20,21 is located at At the center of each access road 16 and the sidewall sections in outlet cavity 14.Protrusion 20,21 has rounded triangle shape Cross section, with bottom and the both sides for being connected to circular top.The bottom of triangle is connected on side wall 4, and round Top from side wall extend inwardly into access road 16 or outlet cavity 14 in.When molten metal flows into access road 16, It is shunted by the round tip of protrusion 20, and is guided towards the filter 12 on either side.When metal passes through the mistake on either side When filter 12 flows into outlet cavity 14, metal is guided by the side of protrusion 21 towards outlet 10.Which ensure that molten metal Device is smoothly passed through in the case of minimum turbulent flow.Due to exporting the small volume of cavity 14, export in cavity 14 Protrusion 21 is less than the protrusion 20 in access road 16.

As shown in Figure 1 b, filter 12 is maintained in the slit 22 in bottom 2.Slit 22 is in side wall 4 and separator 18 Between extend.At the first inner end, filter is maintained in the slot 24 in separator 18, and at the second outer end, filter In the slit 26 being maintained in side wall 4 (it is also shown in Figure 1b).Assemble to filter 12 close (i.e. frictional fit) In slit 22,24,26, to prevent the transverse shifting of filter 12.A pair of of flank column on the either side of filter 12 28 provide further support, to prevent transverse shifting and inclination.Flank column 28 is directly opposite each other, and with filter 12 Intermediate region is adjacent, is generally located at the centre between side wall 4 and separator 18.

In use, molten metal is entered by the entrance 8 in bottom 2 in inlet chamber 6.Then, metal flow into Mouth channel 16, metal is guided to filter 12 by protrusion 20 in access road 16.Pass through filter 12 in molten metal When, slag, dross and other solid impurities are removed from molten metal.The impurity being removed is trapped in the surface of filter On field trash smaller in filter body, and larger impurity tends to rise to the surface of molten metal, there it Be accommodated in top groove (not shown) in.Some the smaller field trashes collected on the filter are by flowing through filter The molten metal on surface is removed, and washes away the field trash of accumulation, and delays the blocking and blocking of filter.Once molten metal is logical It has crossed filter and has been filtered in outlet cavity 14, then molten metal is drawn by protrusion 21 towards the outlet 10 in bottom 2 Lead, this this at molten metal separating device 100.

Illustrated embodiment is the dress for the heavy castings (such as spheroidal graphite cast-iron windmill hub shell) for being suitable for up to 15 tons It sets, and device 100 may have about 1 meter of diameter.In so large-scale device, long rectangle filter is needed.Therefore, often A filter 12 is made of two filter elements, the two filter elements are connected to end-to-end between flank column 28.

Fig. 1 c show include the casting system 150 of the device 100 of Fig. 1 a a part, be used for producing large-scale spheroidal graphite casting Iron winds wheel hub casts 30.Casting 30 weighs about 13.3 tons, about 17.8 tons of total poured weights.Metal enters mould via down gate 32 Tool flows then along runner 34 and enters device 100 via entrance 36.Flowing through access road and filter (not shown) Later, metal enters die cavity to produce casting 30 via 38 separating devices 100 of outlet along runner 40 and by cast gate 42.

Fig. 2 a and Fig. 2 b show use to be given birth to according to the device (not shown) of the embodiment of the utility model first aspect Casting system 250 produce, for steel gyratory crusher casting 130.Casting system 250 include steel casting 130, down gate 52, Two serial runner 58a and 58b and cast gate 74.Casting system 250 further includes the disk 200 of kish and the mistake that uses Filter 68, they are cast the device (not shown) being removed later with mold (being also not shown) and are formed together by using.Casting 130 weigh about 3 tons, and total poured weights are 4 tons.

The residual disk of casting metal 200 has size identical with the internal chamber of used device, and disk 200 feature is consistent with the feature of device.It will thus be appreciated that describing the spy of device referring to the feature of disk 200 Sign.These features include bottom 51 (being shown in Fig. 2 b), top 53 (being shown in Fig. 2 a) and continuous side walls 56 in-between Inner surface.

In casting, metal enters device (not shown) via down gate 52, and flows into inlet chamber by entrance 50 66.Then, metal flows into access road 64, and passes through the protrusion quilt on the inner surface of the side wall 56 in access road 64 It is directed towards a pair of of filter 68, to form recess 72 in the disk of the metal 200 of solidification.Metal is flowed from access road 64 It goes forward side by side inlet/outlet cavity 62 through filter 68.The size of each outlet cavity 62 is by a pair of of filter 68, separator 70 and side The part of wall 56, top 53 and bottom 51 is defined.From outlet cavity 62, the metal filtered flows into runner by outlet 54 58a and 58b by cast gate 74 (as shown in Figure 2 b) and enters cavity body of mould to produce casting 130.Casting 130 and flow passage system It detaches to check and prepare to be used for its final use, such as cleaning, mechanical processing and japanning.

Claims (22)

1. a kind of filter device for being used in casting molten metal technique, the filter device include：

Bottom, top and therebetween continuous side walls, the bottom, the top and the side wall define and enter including center The chamber of oral cavity body；

Entrance, the entrance introduce the inlet chamber；

Multiple outlets；And

Multiple filters for filtering molten metal, the filter are disposed in the stream between the entrance and the outlet In dynamic path,

It is characterized in that：

Each outlet is located in the closed outlet plenum body limited by a part for a pair of of filter and the side wall；

The filter extends internally from the side wall and extends from the bottom to the top, and is radially disposed at Around the inlet chamber；And

Adjacent outlet cavity is by the access road that extends between the inlet chamber and a part for the side wall by that This is separated.

2. filter device as described in claim 1, which is characterized in that the entrance is located in the bottom.

3. filter device as described in claim 1, which is characterized in that the entrance is located in the top.

4. filter device as claimed in claim 1 or 2, which is characterized in that at least some outlets are located in the bottom.

5. filter device as claimed in claim 1 or 2, which is characterized in that at least some outlets are located in the side wall.

6. filter device as described in claim 1, which is characterized in that limit described the one of the side wall of each outlet cavity There is radially-inwardly outburst area, the radially-inwardly outburst area to be configured to guide into the motlten metal stream described for part Outlet.

7. filter device as described in claim 1, which is characterized in that each described one of the side wall in access road Dividing has radially-inwardly outburst area, and the radially-inwardly outburst area, which is configured to guide into the motlten metal stream, limits institute State the filter of outlet cavity.

8. filter device as described in claim 1 further includes multiple support elements, the support element is with construction spaced apart by cloth It sets the perimeter in the inlet chamber and extends to the top from the bottom, which is characterized in that each pair of filter Extend between one of the side wall and the support element.

9. filter device as claimed in claim 8, which is characterized in that each support element is the form of partition wall, the support Part limits the 4th wall of outlet plenum body together with a pair of of filter and the side wall.

10. filter device as claimed in claim 8 or 9, which is characterized in that the inner end of each filter is located at the support element Or in the respective slots in partition wall.

11. filter device as described in claim 1, which is characterized in that the outer end of each filter is located in the side wall In slit.

12. filter device as described in claim 1, which is characterized in that each filter is maintained at narrow in the bottom In slot.

13. filter device as described in claim 1, which is characterized in that each filter is maintained at narrow in the top In slot.

14. filter device as described in claim 1, which is characterized in that each filter passes through appointing positioned at the filter A pair of of flank column on side is supported on stand up position between its end.

15. filter device as claimed in claim 14, which is characterized in that the pair of flank column is located at along the filter At a half-distance between the side wall and the inlet chamber.

16. filter device as described in claim 1, which is characterized in that the top includes for accommodating the recessed of slag Slot.

17. filter device as described in claim 1, which is characterized in that the top or the bottom are removable, to permit Perhaps the chamber in the filter device and the filter are accessed.

18. filter device as described in claim 1, which is characterized in that the filter device has the cross being a substantially circular shape Section, the side wall limit the circular circumference.

19. filter device as described in claim 1, which is characterized in that each filter is made of two filter cells.

20. filter device as described in claim 1, which is characterized in that the filter is carbon combined filtering device.

21. a kind of filter device for being used in casting molten metal technique, the filter device include：

Bottom, top and therebetween continuous side walls, the bottom, the top and the side wall define and enter including center The chamber of oral cavity body；

Entrance, the entrance introduce the inlet chamber；

Multiple outlets；And

Multiple filters for filtering molten metal, the filter are disposed in the stream between the entrance and the outlet In dynamic path,

It is characterized in that：

Each outlet is located in the closed outlet plenum body limited by a part for a pair of of filter and the side wall；

The filter extends from the bottom to the top；

Adjacent outlet cavity is by the access road that extends between the inlet chamber and a part for the side wall by that This is separated；

The filter device further includes multiple support elements, and the support element is disposed in the inlet chamber with construction spaced apart Perimeter and extend to the top from the bottom, each in the pair of filter is in the side wall and phase It answers and extends between a support element, the inner end of each filter is located in the respective slots in the support element.

22. a kind of filter device for being used in casting molten metal technique, the filter device include：

Bottom, top and therebetween continuous side walls, the bottom, the top and the side wall define and enter including center The chamber of oral cavity body；

Entrance, the entrance introduce the inlet chamber；

Multiple outlets；And

Multiple carbon combined filtering devices for filtering molten metal, the filter are disposed in the entrance and the outlet Between flow path in,

It is characterized in that：

Each outlet is located in the closed outlet plenum body limited by a part for a pair of of filter and the side wall；

The filter extends internally from the side wall and extends from the bottom to the top；And

Adjacent outlet cavity is by the access road that extends between the inlet chamber and a part for the side wall by that This is separated.