SE543801C2

SE543801C2 - Tool and method for casting components from cast metal

Info

Publication number: SE543801C2
Application number: SE1951043A
Authority: SE
Inventors: Per Jansson
Original assignee: Pa Invest Ab
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2021-07-27
Also published as: SE1951043A1; WO2021054882A1

Abstract

Disclosed is a casting tool (1) and a method for casting components (200) from cast metal. The tool (1) comprises first, second and third parts (10, 20, 30), movably arranged relative each other, wherein the second part (20) is arranged between the first part (10) and the third part (30) and comprises at least one shape-defining cavity (22), arranged for receiving cast metal. The cavity (22) is open towards the first part (10) and towards the third part (30). The tool (1) further comprises an evacuation path (15) leading from the shape-defining cavity (22) and to outside the tool (1). The evacuation path (15) is arranged in a surface area of at least one of the first or second part (10, 20), such as the evacuation path (15) is arranged between the first and second part (10, 20) when the first and second part (10, 20) are mounted together.

Description

TOOL AND METHOD FOR CASTING CÛMPÖNENTS» FRÜM CAS-T EX/ÉETAL Technical field id="p-1"

[0001] The present invention relates generally to a tool and a method for casting ofgoods, for example aluminium goods, by casting in cast metal/cast compounds, forexample fluid metal or so-called semi-solid metal slurry. The tool and method areespecially suited for casting goods with thin and long flanges or the like, where thecasting tool has deep and thin cavities.

Background art id="p-2"

[0002] lt is well-known to produce details and components of cast metal by castingusing a fluid metal of some kind. lt is also well-known to cast components from castmetal in so-called semi-solid form (liquid-solid form), i.e. a material that when castingcontains a mixture of the metal in liquid state and the metal in solid state. The metalin solid state in such mixture is preferably in the shape of small particles. Such amaterial is called referred to as semi-solid metal slurry and the method is called semi-solid casting. The metal in the slurry can be a pure metal of one and the same atomicnumber or an alloy of different metals. id="p-3"

[0003] When comparing casting details from liquid metal to casting details from asemi-solid metal slurry, the details made from a semi-solid metal slurry often haveless defects and better mechanical characteristics. Also, the semi-solid metal slurry ismuch easier to handle than the liquid metal. For example, the semi-solid metal slurrysolidifies more slowly than the liquid metal, which makes it easier to change theshape of a detail made from a semi-solid metal slurry during the solidificationprocedure than to change the shape of a detail made from liquid metal. For the samereason, traditional casting, from a liquid metal, needs to be made quickly, before thematerial solidifies. For example in die casting, a quick pressing gives air bubblesinside the casted details, which results in details with less quality. When die casting isperformed from a semi-solid metal slurry, the die casting can be made more slowlyresulting in less air bubbles. Casting from a semi-solid metal slurry is therefore verysuitable for critical details that are exposed to high strains and therefore need to be ofhigh quality. id="p-4"

[0004] A number of problems or challenges in most of known casting processesand thereby both in fluid metal casting and in semi-solid casting, concerns casting ofthin and deep or long casting details like for example casted details with deep flangesas motor details or cooling flanges for electronics. When casting a detail, the castingtool normally is prepared by spraying a release agent/mould release agent on theinterior surfaces of the shape-defining cavity of the tool, which cavity is arranged forthe liquid metal or semi-solid metal slurry and which forms the detail. Especially forthin details, and even more at thin and deep or long details, there is a problem toapply the release agent to the deepest lying surfaces. This due to that an airpressure (resistance) is built up when spraying the release agent towards the bottomof the deep cavity, and further, the casting tool is normally warm, at least around 200- 250°C, and since the time between two casting shots is short, this means that a partof the release agent, which is a mixture containing water, will be vaporized and resultin vapor barriers which need to be removed somehow from the surfaces. lf therelease agent fails to cover all surfaces, the ﬂowability of the liquid metal or semi-solid metal slurry becomes poor and it is difficult to fill the cavities completely down tothe bottom of each thin cavity, which in turn means poor quality of the surface of thecasted detail. id="p-5"

[0005] ln connection to the problems described above, casting tools normally arearranged with evacuation/venting equipment connected to the inlet of thecavity/cavities, that is at the “dividing line” of the tool. The dividing line is where thetwo halves of the tools are separated to remove the casted detail from the tool. At forexample a “flanged” product with thin and long flanges, there is a problem ofevacuating the air and at the same time fill the cavity with the material. Since thecavities of the flanges are deep, they comprise “a lot” of air (gas) which need to beevacuated during the filling ofthe tool, and a combination of simultaneous evacuatingand filling with high pressure is needed. Some of the air is normally not possible toevacuate and remains in the cavity, which means that the process demands a highpressure to compress the air and fill the tool. The result is that the air is pressed intothe cast metal and by that the metal comprises small air bubbles which is referred toas pores in the material and which should be avoided, since it normally means decreased quality or poor surface quality. id="p-6"

[0006] Another problem with Casting tools for thin and deep or long details likeflanges or the like, concerns the production of the tool itself. The production ofcasting tools is a time consuming and expensive process, and the tools may beformed by different forms of so-called electro-spark machining, electro-dischargemachining (EDM) or wire cutting (spark-erosion cutting). When producing castingtools for the designated area (like flange details), a method normally used is the so-called electro-discharge machining (EDM). lt is of most importance that the castingtool has smooth interior surfaces with high surface smoothness as mentioned above.lf the smoothness is poor, it is risk of that the detail will get stuck in the tool instead ofloosening from the tool. When producing a conventional tool of hardened steel,electro-discharge machining (EDM) is used to form the cavities of the tool, since wirecutting may not be used due to the closed bottom of the casting tool. After the EDM,the surfaces must be finished to get rid of residues from the machining. This is time- consuming and cost-driving when production casting tools. id="p-7"

[0007] Consequently, there is an interest for improved casting tools and methodsconcerning the production of high quality details by casting from cast metal such as for example fluid metal or semi-solid metal slurry.

Summary of invention id="p-8"

[0008] An object of the present invention is to provide an improved casting tool forcasting components front cast :hetat as for exarnpie fitiid :hetat or sehtieoiid :hetatsturry. Another object is to provide an improved method for casting of componentsfrom cast metal by a such a casting tool. [tfttlitfttš] According to an aspect of the invention, a casting tooi for castingcornponents frorri cast rnetat is disctosed. The casting tooi conwprisee a first part, asecond part and a third part, tfvhereih the second part is arrengeci hettireen the firstpart and the third part. "the second part cornprises at ieast one shapedefiriing cavitywhich is arranged for receiving cast rnetat, and which cavity is open [towards of thesecond part, srifhich first side facing the first part. "the sitapeæiefiniifg cavity is furtheropen towards a second side of the second part, vvhicit second side facing the thirdpart. The casting tooi further cornprises ah intet path arranged for aitowing cast rnetatto pe iniected into the shatie-defining cavity, tivherein the iniet path is arranged in atieast the third part and being in finid connection With the cavity. The casting toci further is arranged such as, during injectien af the east rnetai, the first, secend andthird part rriay he bretight together se that first side ct' the second part hears againstthe first part, and the second side ef the secend part hears against the third part.Fiirther, the third part is reteasahie frem the seeend part, preferahiy atter inieetieit etcast rnetai, and the first part is reieasahie trern the second part. Titus, the first,second and third parts are rnevahiy arranged retative each ether. The casting tdetfurther cerriprises at ieast ene axfaenatiert path ieadiitg 'train tite shapa-dafining cavityand te dutside the teei and the evacuatian path is arranged in at Eeast ene ef the firstside et' the secend parter a third side ef the firat rtart, vtfhich third side faces thesecend part. This means that the evacuation path is arranged between the first andseccnd part ytfheit the first and seeend part are rneunted together. [üíttít] Such an arrahgerneitt is aspeciaiiy irreii suited fdr casting et cernpenentscarnprising thin and deep or long parts like for example casted details with deepflanges as motor details or cooling ﬂanges for electronics. First of all, by dividing thecasting tool such as the shape-defining cavity is open also at the bottom (and notonly at the top as a normal two-part casting tool) enables a very good result whenspraying the interior surfaces with release agent. This, due to the fact that there is nolonger a problem to apply the release agent to the deepest lying surfaces, since theair pressure (resistance), which normally is built up when spraying the release agenttowards a closed bottom of the deep cavity, is eliminated by the open design at the“bottom”. Secondly, the evacuation path eliminates the need of using high pressureto evacuate/compress the air or gas which in prior art get captured inside the shape-defining cavity. The evacuation path is arranged as a very thin channel, for exampleas one or several (depending on the form of the shape-defining cavity) thingroove/grooves at the surface of the first part which faces the second part, or at thesurface of the second part which faces the first part, i.e. in the dividing line/betweenthe first and second parts of the casting tool. The open design “at the bottom side",i.e. between the first and second part, enables to produce the casting tool by so-called wire cutting instead of electro-discharge machining (EDM), which is normallyused when producing a conventional tool of hardened steel. Wire cutting is a bettermethod to make the interior surfaces of the shape-defining cavities more smooth with less amount of pores. id="p-11"

[0011] The casting teei further comprises a spraying arrangement arranged forspraying a release agent into the shape-defining cavity in direction from at least thesecond side of the shape-defining cavity, when the first part is released from thesecond part and the third part is released from the second part. Ey the sprayingarrangera-ent, all interior suríaees En the snape-defining cavity fnay be properly'aprayed, and the epen design makes errre the release agent reaehee all tnreugåw the eitape-deifiniitg cavity. id="p-12"

[0012] According to an embodiment, the first part of the casting tool comprises atleast one first end-portion cavity which is open on the third side of the first part,wherein the at least one first end-portion cavity is in fluid connection with the at leastone shape-defining cavity, when the second part bears against the first part. By this,the at least one first end-portion cavity and the at least one shape-defining cavity arearranged to together form the shape-defining cavity. An advantage with having “thebottom” (the first end-portion cavity) of the shape-defining cavity in the first part, isthat sharp edges of the bottom can be avoided, since the ends of the shape-definingcavity by that can have a closing radius. This means that the ends of the casted component may be rounded and smooth and with no sharp edges. id="p-13"

[0013] According to an embodiment, the third part of the casting tool comprises atleast one second end-portion cavity which is open on a fourth side of the third part,which fourth side faces the second part, wherein the at least one second end-portioncavity is in fluid connection with the at least one shape-defining cavity when thesecond part bears against the third part. By this, the at least the one second end-portion cavity and the at least one shape-defining cavity are arranged to togetherform the shape-defining cavity. id="p-14"

[0014] The casted component may in other words be formed by only the shape-defining cavity or be formed by the shape-defining cavity complemented by the firstend-portion cavity (in the first part) or the second end-portion cavity (in the third part),or by being complemented by the first end-portion cavity and the second end-portion cavity. id="p-15"

[0015] According to an embodiment, the first part of the casting tool is fixed, andthe second part is movably arranged relative the first part, and further the third part is movably arranged relative the second part. The movable parts may be controlledseparately to control the opening and closing sequences of the parts relative eachother, to for example divide the casting tool to eject the casted tool, to divide the toolfor a spraying sequence for spraying the first, second and third parts in a wantedsequence, individually or together or to spray some of the parts. id="p-16"

[0016] According to a most preferred embodiment of the invention, the cast metalis semi-solid metal slurry. The casting tool is most preferred to be used with semi-solid metal slurry, since details made from a semi-solid metal slurry often have lessdefects and better mechanical characteristics compared to details made from liquidmetal. As told above, the semi-solid metal slurry is also much easier to handle thanthe liquid metal and the semi-solid metal slurry solidifies more slowly than the liquidmetal, which makes it easier to change the shape of a detail made from a semi-solidmetal slurry during the solidification procedure than to change the shape of a detailmade from liquid metal. For the same reason, traditional casting, from a liquid metal,needs to be made quickly, before the material solidifies. For example in die casting, aquick pressing gives air bubbles inside the casted details, which results in details withless quality. When die casting is performed from a semi-solid metal slurry, the diecasting can be made more slowly resulting in less air bubbles. Casting from a semi-solid metal slurry is therefore very suitable for critical details that are exposed to highstrains and therefore need to be of high quality. And concerning casting of thin anddeep or long casting details like for example casted details with deep flanges asmotor details or cooling flanges for electronics, the casting tool is far better thanknown casting tools, especially due to the “open design” of the shape-defining cavity,which enables the good spraying result even down to the very bottom of the thiscavities, and also due to the evacuation path at the bottom om the shape-definingcavity instead of at the top, as in prior art solutions. id="p-17"

[0017] According to an embodiment, the at least one evacuation path has a heightwhich is between 0.05 - 0.2 mm, preferably 0.1 mm. Of most importance is that thecast metal may fill the shape-defining cavity (or cavities, if end-portion cavities areapplicable) but not fill/enter the evacuation path/paths. Therefore the at least oneevacuation path must be very thin. id="p-18"

[0018] According to an embodiment, the casting tool comprises an ejecting means,arranged for ejecting a casted component from the casting tool. When the third andsecond part are separated, an ejecting means is arranged to eject the castedcomponent from the casting tool. After this, the tool may be prepared for a new casüng. id="p-19"

[0019] According to an embodiment, an evacuation arrangement is connected tothe evacuation path and which is arranged for evacuation of air or gas from theshape-defining cavity. ln most embodiments of the invention, an evacuationarrangement (such as a suction unit or the like) is not needed, since the air will beevacuated automatically when the cavity is filled, but for some applications anevacuation arrangement may be needed. The evacuation arrangement provides a vacuum which facilitates the evacuation of air or gas.

Brief description of drawinds id="p-20"

[0020] The invention is now described, by way of example, with reference to the accompanying drawings, in which:[0021] Fig. 1a is a section view of a casting tool according to the invention. id="p-22"

[0022] Fig. 1b is a zoomed view of the area within the circle in Fig.1a, symbolicallyshowing a spraying of a shape-defining cavity and an evacuation of air/gas from the shape-defining cavity of the casting tool. id="p-23"

[0023] Fig. 2a is a top view of a first part of the casting tool seen in direction from asecond part of the casting tool. The top view shows end-portion cavities andevacuation paths positioned in a surface region of the first part and facing the second part. id="p-24"

[0024] Fig. 2b is a perspective view of the end-portion cavities and evacuation paths showing that the evacuation paths are shallow. id="p-25"

[0025] Fig. 3a is a top view of the second part of the casting tool seen in directionfrom the first part of the casting tool. The top view shows the shape-defining cavitiesand evacuation paths positioned in a surface region of the second part and facing the first part. id="p-26"

[0026] Fig. 3b is perspective view of the shape-defining cavities and evacuation paths showing that the evacuation paths are shallow. id="p-27"

[0027] Fig. 4 is a schematic block diagram showing a method for casting of components from cast metal by a casting tool according to the invention.

Description of embodiments id="p-28"

[0028] ln the following, a detailed description of embodiments of a casting tool 1 forcasting of components from cast metal is provided. Further, an exemplary method forcasting of components from cast metal by a casting tool according to the invention isdescnbed. id="p-29"

[0029] Fig. 1a shows a casting tool 1, for casting a component 200 from castmetal, preferably cast metal of semi-solid metal slurry. The casting tool 1 comprisesthree main parts, a first part 10, a second part 20 and a third part 30, which in thefigure are in a separated state. When cast metal is to be injected into the casting tool1, the casting tool is closed to a closed state, why the casting tool 1 is arranged suchas the first, second and third part 10, 20, 30 can be brought together, so that a firstside 21 of the second part 20 bears against a first part 10, and a second side 23 ofthe second part 20 bears against the third part 30. ln the preferred embodiment, thefirst part 10 is fixed and the second part 20 is releasable from the first part 10 and thethird part 30 is releasable from the second part 20. The second part 20 comprises atleast one shape-defining cavity 22, which is arranged for receiving the cast metal(preferably the semi-solid metal slurry). The shape-defining cavity 22 is open towardsthe first side 21 of the second part 20, which first side 21 faces the first part 10 and itis further open towards the second side 23 of the second part 20, which second side23 faces the third part 30. The second part 20 is according to the embodimentarranged between the first part 10 and the third part 30, but it is to be understood that“between” also includes that for example, that the third part 30 is arranged above(relating to Fig. 1) the second part 20 or below the same. Other orientations are alsoapplicable, but it is important that the shape-defining cavity 22 is open towards thefirst part 10 and towards the third part 30. id="p-30"

[0030] The first part 10 of the casting tool 1 further comprises at least one first end-portion cavity 22a, in the figure a plurality of first end-portion cavities 22a. The first end-portion cavities 22a are open on a third side 12 of the first part 10, wherein theyare in fluid connection with the at least one shape-defining cavity 22, when thesecond part 20 bears against the first part 10 (in the closed state - not visible in thefigures). Further, the third part 30 comprises at least one second end-portion cavity22b, in the figure a plurality of second end-portion cavities 22b. The second end-portion cavities 22a are open on a fourth side 32 of the third part 30, which fourthside 32 faces the second part 20. By this, the second end-portion cavities 22b are influid connection with the at least one shape-defining cavity 22 when the second part20 bears against the third part 30 (in the closed state - not visible in the figures). Bythis, the first end-portion cavities 22a, the second end-portion cavities 22b and theshape-defining cavity 22 together form the shape-defining cavity 22, 22a, 22b whichforms the casted component 200. The casting tool 1 may also comprise an ejectingmeans (not visible) which is arranged for ejecting the casted component 200 from the casting tool 1. id="p-31"

[0031] An inlet path 35 is arranged in at least the third part 30 and the inlet path 35is in fluid connection with the cavity 22 for allowing the cast metal to be injected intothe shape-defining cavity 22. ln the embodiment of Fig. 1a, the inlet path 35 isarranged in the first, second and third parts 10, 20, 30 and in the third part 30, theinlet path 35 is in connection with the shape-defining cavity 22, 22b, to allow the castmetal to enter the cavity 22 from this part (enter the cavity from left to right in thefigure). Normally, a piston is connected to/ inserted in the inlet path 35, in theexample from the right into the first part 10, and cast metal is injected into the casting tool 1. id="p-32"

[0032] Fig. 1b is a zoomed view of the area within the circle in Fig.1a, symbolicallyshowing a spraying b of interior surfaces a of the shape-defining cavity 22 and furthersymbolically showing an evacuation c of air/gas from the shape-defining cavity 22 ofthe casting tool 1. The casting tool 1 thereby comprises a spraying arrangementarranged for spraying b a release agent into the shape-defining cavity 22, in directionfrom the second side 23 of the second part 20, when the first part 10 is released fromthe second part 20 and the third part 30 is released from the second part 20, such asthe interior surfaces a of the cavity 22 obtain a layer of release agent. lt is alsopreferred that the spraying arrangement is arranged to spray interior surfaces of the first end-portion cavities 22a of the first part 10 as well as the second end-portion cavities 22b of the third part 30. This spraying b is exemplified in the figure as aspraying in the gap between the separated first and second parts 10, 20, in directiontowards the first end-portion cavities 22a and as a spraying in the gap between theseparated second and third parts 20, 30, in direction from the second side 23 of thesecond part towards the first side 21 of the same. The evacuation c of air/gas fromthe shape-defining cavity 22 of the casting tool 1, which is symbolically shown in Fig.1b, will be further described in relation to Fig. 2a-b and Fig. 3a-b. id="p-33"

[0033] ln Fig. 2a-b, the first part 10 of the casting tool 1 can be seen, wherein Fig.2a is a top view seen in direction from the second part 20 of the casting tool 1 andFig. 2b is a perspective view of the same. The first part 10 comprises according to anembodiment a plurality of evacuation paths 15 positioned in a surface region of thefirst part 10 and facing the second part 20, which evacuation paths 15 are connectedto the end-portion cavities 22a of the first part 10. The evacuation paths 15 areshallow and leads from the shape-defining cavity 22, i.e. from the end-portion cavities22a which in the closed state of the casting tool 1 is connected to the shape-definingcavity 22, and to an outside the casting tool 1. By this, the evacuation path 15 is, soto speak, arranged between the first and second part 10, 20 when the first andsecond parts 10, 20 are mounted together. The evacuation paths 15, preferably hasa height which is between 0.05 - 0.2 mm, and more preferred around 0.1 mm, whichmeans that the semi-solid metal slurry (or the fluid metal) will not enter theevacuation paths 15, but the air/gas that need to be evacuated while filling theshape-defining cavity 22, 22a, 22b will be evacuated through the evacuation path 15and out to the free. id="p-34"

[0034] Another alternative is shown in Fig. 3a-b in which the second part 20 of thecasting tool 1 can be seen, wherein Fig. 3a is a top view seen in direction from thefirst part 10 of the casting tool 1 and Fig. 3b is a perspective view of the same. Thesecond part 20 comprises according to this alternative embodiment a plurality ofevacuation paths 15 positioned in a surface region of the second part 20 and facingthe first part 10, which evacuation paths 15 are connected to the shape-definingcavities 22 of the second part 20. The evacuation paths 15 are shallow and leadsfrom the shape-defining cavity 22 to an outside the casting tool 1. ln the same way asdescribed above, the evacuation paths 15 are, so to speak, arranged between the 11 first and second part 10, 20 when the first and second parts 10, 20 are mountedtogether. id="p-35"

[0035] Of course, both the first part 10 and the second part 20 may comprise theevacuation paths 15, wherein the heights of the same will be adopted to have a totalheight according to the preferred heights presented above. id="p-36"

[0036] The casting tool 1 may also comprise an evacuation arrangement (notvisible) connected to the evacuation path 15, which then is arranged for evacuationof air or gas from the shape-defining cavity 22, via the evacuation path 15. Theevacuation arrangement may be used if a forced or controlled evacuation of air/gas is needed to better evacuate the air/gas from the shape-defining cavity 22, 22a, 22b. id="p-37"

[0037] Fig. 4 is a schematic block diagram showing a method for casting ofcomponents from cast metal by a casting tool according to the invention. The methodcomprises bringing 100 the first, second and third part 10, 20, 30 together so that thefirst side 21 of the second part 20 bears against the first part 10 and the second side23 of the second part 20 bears against the third part 30. Thereby, the casting tool 1 isin a closed state ready to be used for casting a component 200. After this step, theshape-defining cavity 22, 22a, 22b is filled 110 by that cast metal, preferably semi-solid metal slurry, is injected into the shape-defining cavity 22, 22a, 22b via the inletpath 35, so that a component 200 is casted in the shape-defining cavity 22, 22a, 22b.When the casted component 200 has solidified, the second part 20 of the casting tool1 is separated 130 from the first part 10 and the third part 30 of the casting tool 1 isseparated from the second part 20 of the casting tool 1. Thereby, the casting tool 1 isin a separated state wherein a step of ejecting 140 the casted component 200 fromthe casting tool 1 is performed by an ejecting means. When the casted tool isremoved from the tool 1, a spraying arrangement is introduced between theseparated parts 10, 20, 30 and a spraying 150 of a release agent into the shape-defining cavity 22 in direction from at least the second side 23 of the shape-definingcavity 22 as well as a spraying 150 of the first end-portion cavity 22a and preferablyalso the second end-portion cavity 22b (if applicable) is performed. A spraying may ofcourse be performed in any direction between the separated parts 10, 20, 30 of thecasting tool 1, of importance is that all interior surfaces of the shape-defining cavity22, 22a, 22b which will get in contact with the cast metal/semi-solid metal slurry 12 during Casting, will receive release agent. Since especially the shape-defining cavity22 of the second part 20 have deep and thin cavities, this inventive tool and methodis far better than prior art casting tools and methods. id="p-38"

[0038] The method may further comprise, during the step of filling 110, a step ofsimultaneously evacuating 120 air and/or gas from the shape-defining cavity 22, 22a,22b by an evacuation arrangement 50 connected to the evacuation path 15. id="p-39"

[0039] After the spraying 150, the method is repeated.

Claims

1. A Casting tool (1) for Casting components from Cast metal, the Casting tool(1) Comprising: a first part (10), a second part (20), and a third part (30),wherein the seCond part (20) is arranged between the first part (10) and the third part(30), and the seCond part (20) Comprises at least one shape-defining Cavity (22)arranged for reCeiving Cast metal, and whiCh Cavity (22) is open towards a first side(21) of the seCond part (20) faCing the first part (10) and is open towards a seCondside (23) of the seCond part (20) faCing the third part (30), the Casting tool (1) further Comprising an inlet path (35) arranged forallowing Cast metal to be injeCted into the shape-defining Cavity (22), the inlet path(35) being arranged in at least the third part (30) and being in fluid ConneCtion withthe Cavity (22), the Casting tool (1) further being arranged for, during injeCtion of the Castmetal, the first, seCond and third part (10, 20, 30) being brought together so that firstside (21) of the seCond part (20) bears against the first part (10) and the seCond side(23) of the seCond part (20) bears against the third part (30), and wherein the thirdpart (30) is releasable from the seCond part (20) and the first part (10) is releasablefrom the seCond part (20), the Casting tool (1) further Comprising at least one evaCuation path (15)leading from the shape-defining Cavity (22) and to outside the tool (1), the evaCuationpath (15) being arranged in at least one of the first side (21) of the seCond part (20)or a third side (12) of the first part (10) whiCh third side (12) faCes the seCond part(20), suCh as the evaCuation path (15) being arranged between the first and seCond part (10, 20) when the first and seCond part (10, 20) are mounted together, ~ e .-: \ ~“ ~' - '_ _ _ - _. . . .w - . ( -gw .~_-v§«\.-\;»~ .~\,-\v~.-;- yuwﬂ-*f-w - -\_~¿-.- <:;~-\,~ ~ -wU-u-x- \;-\,- «¿-\.v w (ﬁvm m . ~\,~l~=,~,;_;*~*~\_»:_.~==~~~~ --.;\:o.=\1»~==<«~::\§~=*: ::: =:~ ::~\~=:~*\: -------- -«¿;»§¿_\_“““_Casting tool (1) according to claim wherein the first part (10)comprises at least one first end-portion cavity (22a) which is open on the third side(12) of the first part (10), wherein the at least one first end-portion cavity (22a) is influid connection with the at least one shape-defining cavity (22) when the second part(20) bears against the first part (10), such as the at least one first end-portion cavity(22a) and the at least one shape-defining cavity (22) are arranged to together form the shape-defining cavity. tool (1) according to any of the preceding claims, wherein the thirdpart (30) comprises at least one second end-portion cavity (22b) which is open on afourth side (32) of the third part (30) which fourth side (32) faces the second part (20),wherein the at least one second end-portion cavity (22b) is in fluid connection withthe at least one shape-defining cavity (22) when the second part (20) bears againstthe third part (30), such as the at least the one second end-portion cavity (22b) andthe at least one shape-defining cavity (22) are arranged to together form the shape- defining cavity. iš=»»»»»»»»»¿¿§¿““N“Casting tool (1) according to any of the preceding claims, wherein the firstpart (10) is fixed and the second part (20) is movably arranged relative the first part(10), and further the third part (30) is movably arranged relative the second part (20). »x ------- --_if§l_¿__________Casting tool (1) according to any of the preceding claims, wherein the cast metal is semi-solid metal slurry. \ ________ __Casting tool (1) according to any of the preceding claims, wherein the atleast one evacuation path (15) has a height which is between 0.05 - 0.2 mm. ------- --_}fﬁ_.“_\_\_“_Casting tool (1) according to any of the preceding claims, furthercomprising an ejecting means, arranged for ejecting a casted component (200) from the casting tool (1 ). ------- -gšggmggggCasting tool (1) according to any of the preceding claims, furthercomprising an evacuation arrangement connected to the evacuation path (15) andarranged for evacuation of air or gas from the shape-defining cavity (22). ~ n method for casting of components from cast metal by a casting tool (1) according to any of the previous claims, the method comprising: - bringing (100) the first, second and third part (10, 20, 30) together sothat the first side (21) of the second part (20) bears against the first part(10) and the second side (23) of the second part (20) bears against thethird part (30), - fi||ing (110) the shape-defining cavity (22, 22a, 22b) by injecting castmetal into the shape-defining cavity (22, 22a, 22b) via the inlet path (35),so that a component (200) is casted in the shape-defining cavity (22,22a,22b) - when the casted component (200) has solidified, separating (130) thesecond part (20) of the casting tool (1)from the first part (10) of thecasting tool (1) and the third part (30) of the casting tool (1) from thesecond part (20) of the casting tool (1), - ejecting (140) the casted component (200) from the casting tool (1 ), - spraying (150) a release agent into the shape-defining cavity (22) indirection from at least the second side (23) ~ ' Musa-V .~\=_,s:\-\=.-\_.. .- .f-w-yx ________________________________________ __A method according to claim wherein the step of spraying (150) further comprising spraying a release agent into the at least one firstend-portion cavity (22a) of the first part (10). method according to claim wherein the stepof spraying (150) further comprising spraying a release agent into the at least onesecond end-portion cavity (22b) of the third part (30). »»»»»»» method according to any of claims whereinthe spraying (150) of the release agent is performed by a spraying arrangement--~§-ﬂš-š-T~},which is arranged for spraying the release agent into the cavity (22, 22a) in direction from at least the second side (23) “ \ 16 ~~~~~~~ method according to any of claims the method further comprising, during the step of filling (110), simultaneouslyevacuating (120) air and/or gas from the shape-defining cavity (22, 22a, 22b) by anevacuation arrangement (50) connected to the evacuation path (15) method according to any of claims whereinthe cast metal is semi-solid metal slurry.