CN101262968B - Casting method - Google Patents

Casting method Download PDF

Info

Publication number
CN101262968B
CN101262968B CN2006800339692A CN200680033969A CN101262968B CN 101262968 B CN101262968 B CN 101262968B CN 2006800339692 A CN2006800339692 A CN 2006800339692A CN 200680033969 A CN200680033969 A CN 200680033969A CN 101262968 B CN101262968 B CN 101262968B
Authority
CN
China
Prior art keywords
motlten metal
die cavity
cast
casting
mold
Prior art date
Application number
CN2006800339692A
Other languages
Chinese (zh)
Other versions
CN101262968A (en
Inventor
五家政人
Original Assignee
五家政人
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2005268163A priority Critical patent/JP4150764B2/en
Priority to JP268163/2005 priority
Application filed by 五家政人 filed Critical 五家政人
Priority to PCT/JP2006/316041 priority patent/WO2007032174A1/en
Publication of CN101262968A publication Critical patent/CN101262968A/en
Application granted granted Critical
Publication of CN101262968B publication Critical patent/CN101262968B/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082Sprues, pouring cups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/13Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/15Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum

Abstract

To provide a casting method based on gravity casting with an air-permeable mold, wherein a melt is charged into only a desired part of the mold cavity and solidified. [MEANS FOR SOLVING PROBLEMS] A melt in a volume approximately equal to the volume of a cavity part which is desired to be filled with the melt is poured. Thereafter, a compressed gas is supplied through the melt-inlet part to fill the desired cavity part with the melt. The melt is then solidified. According to need, the cavity is evacuated before and after the casting.

Description

Casting

Technical field

The present invention relates to the casting of a kind of high precision int and high production rateization, this casting is from the mold top of aeration mold or the sidepiece casting that carries out gravity-assist pouring.

Background technology

The mold that uses sand to carry out moulding (moulding) as the aeration mold is the most common, and in addition, the mold that uses ceramic particle or metallic to carry out moulding also is widely used.In addition, even gypsum etc. do not have the mold of aeration substantially, sneak into or partly use the aeration material and the mold of having given aeration also can be counted as the aeration mold.In addition, even under the situation of the metal mold that does not have aeration fully, passage or air vent are set and the mold of having given aeration also can be counted as the aeration mold.Aeration mold of the present invention is the mold that comprises above-mentioned these aeration molds.

Usually, in casting, mold cavity by gate part, running channel portion, emit oral area and goods portion to constitute.In addition, as required, the situation that overflow part etc. is set in order to discharge unwanted motlten metal from goods portion exist to be set also,, to think by basic gate part, running channel portion, emit oral area and goods portion to constitute here in order to make explanation simple.

Generally, common casting and as in the vacuum process of special casting etc. any casting in, casting all is that these 4 die cavities are partially filled and process that finish.And solidify finish after, only with goods part necessary in these 4 parts from and take out, carry out last trimming after, obtain final mo(u)lding goods.

That is, remove gate part, the running channel portion of goods portion and emit oral area to separate from goods as unwanted part at last, the new work of laying equal stress on is that salvage material is for dissolving again.In this unwanted part, emitting oral area is necessary part in process of setting for the viability that compensates goods portion, and gate part and running channel portion are necessary parts for the filled-type cavity segment in cast only.

In addition, because graphite crystallization takes place and produces volumetric expansion in use iron casting things etc. in process of setting, and the part of the amount of contraction of needs compensation motlten metal, so also can cast out the very high mo(u)lding of viability even without rising head under certain condition.Do not need to emit oral area under this situation yet, only fill motlten metal and get final product to goods portion.

In above so existing any casting,, adopt in the end to unwanted gate part, running channel portion and emit the casting process of filling motlten metal in the oral area in order to obtain goods as initial purpose.This is very irrational.This is passed through to adopt certain methods, if can be only to goods portion or only to goods portion with emit in the desired die cavity part of necessity such as oral area the filling motlten metal and make it to solidify, just can significantly improve by goods portion weight/always inject the injection qualification rate that weight is represented, and subsequent handling such as somatotype (separating frame), goods separation also can be simplified significantly.

Therefore prior art is investigated, but carried out the casting of gravity-assist pouring, do not find to disclose in the mold cavity desired fully only to the casting method of the partially filled motlten metal of die cavity from the mold top and the sidepiece of aeration mold.

As so desired can be only to the casting of the partially filled motlten metal of die cavity, it is the highest that vacuum process is considered to feasibility.Therefore as the reference example of prior art, enumerate following patent documentation 1 to 15.But wherein any one all is to gate part, running channel portion, emits the prior art of filling motlten metal in the whole die cavities part of oral area and goods portion.

In the patent documentation 1 (Japanese kokai publication sho 61-180642 communique), disclose the mold that aeration is set in chamber (チ ヤ Application バ one), after the material that obtains with fusion is filled straight cast inlet, make chamber the reduce pressure pressure of regulation and the reduced pressure casting method of pouring into a mould.

In the patent documentation 2 (Japanese kokai publication hei 7-265998 communique), disclose in the normal temperature hardened mold of suction casting the suction casting mold that the thickness of the mold of goods and scheme die cavity is changed.

In the patent documentation 3 (TOHKEMY 2003-170226 communique), disclose for the mold that carries out whole decompression, in mold sensors configured, learn the reduced pressure casting method of the action that begins after motlten metal flows into to reduce pressure when detection.

In the patent documentation 4 (Japanese kokai publication hei 3-216258 communique), disclose sand mold cover with resin film system and cover all surface around the mold airtightly, and exhaust outlet is being set with position that cast gate fully separates, and the decompressor of decompression therefrom.

In the patent documentation 5 (Japanese kokai publication sho 60-124438 communique), disclosing no frame (No frame) gypsum mold of moulding is positioned on the suction box with passage, and cover gypsum mold with diaphragm, the reduced pressure casting method of after the suction box decompression, pouring into a mould.

In the patent documentation 6 (the special fair 7-115119 communique of Japan), disclose in sublimation pattern casting method (sublimation pattern casting method), at the sidewall of opening the casting frame up and down attraction mechanism is set, is casting frame up and down with airtight vacuum process that seals and attract and reduce pressure.

In the patent documentation 7 (Japanese kokai publication hei 6-122060 communique), disclose and in having the casting frame of passage, carry out the moulding of organic binder bond mold, it be arranged in the chamber of the open steel plate system in top and the reduced pressure casting method of under decompression state, pouring into a mould.

In the patent documentation 8 (Japanese kokai publication hei 8-103861 communique), disclose in the casting thing sand in the relief chamber of top style of opening and bury sand mold underground, at the reduced pressure casting method that attracts to pour into a mould under the decompression state.

In the patent documentation 9 (Japanese kokai publication sho 57-31463 communique), disclose the manufacture method that in die cavity, attracts the casting thin-wall thing of cast by the passage that is provided with in gate location position farthest from mold.

In the patent documentation 10 (Japanese kokai publication hei 6-55255 communique), disclose on the position that the weir portion with mold isolates rising head or overfall are set, the manufacture method of the steel casting thing of casting in the time of from this hollow hole part decompression is set and the outside hollow hole part that is connected in its vicinity.

In addition, in patent documentation 10, disclose equally the decompression rate controlling organization is set, make the injection rate of motlten metal become constant decompression method, and motlten metal liquid level detecting sensor is set in the portion of weir, after detecting motlten metal, get started the method for decompression etc.

In the patent documentation 11 (Japanese kokai publication hei 6-226423 communique), disclose with above-mentioned patent documentation 10 and have same structure, decompression attracts to be provided with between mouth and rising head and the overfall compares the bigger attraction parts of venting quality with mold, the manufacture method that making decompression attract the Pressure reducing ratio in the oral-lateral die cavity to water the bigger casting thin-wall thing of the interior decompression of oral-lateral die cavity.

In the patent documentation 12 (Japanese kokai publication hei 9-85421 communique), disclose setting and the outside hollow hole part that is connected in the core core print that in mold, is provided with, and the reduced pressure casting method of decompression.

In the patent documentation 13 (Japanese kokai publication hei 4-147760 communique), disclose between the position of the needs of mould space pressurization and mold outside and be provided with the attraction casting mold that forms the attraction guide groove that attracts path.

In the patent documentation 14 (Japanese kokai publication sho 60-56439 communique), disclose from being provided with the suction casting gypsum mold of the refractory material made membrane better to outer surface near the final filling part of gypsum mold than gypsum aeration.

In the patent documentation 15 (Japan special fair 7-41400 communique), disclose and attract respectively from giving birth to type mold (giving birth to type cast type) gas that produces and the gas that produces from core, and the suction casting method of freely respectively suction pressure being adjusted.

Summing up the prior art of disclosed vacuum process in the above patent documentation, wherein all is the whole die cavity of filling mold in any one casting.Therefore, the injection qualification rate of being represented by goods portion weight/always inject weight is low, and subsequent handling such as somatotype, goods separation is also very miscellaneous.

As above, the casting method of desired only filled-type cavity segment is not disclosed fully or implements in the existing casting.

Patent documentation 1: Japanese kokai publication sho 61-180642 communique

Patent documentation 2: Japanese kokai publication hei 7-265998 communique

Patent documentation 3: TOHKEMY 2003-170226 communique

Patent documentation 4: Japanese kokai publication hei 3-216258 communique

Patent documentation 5: Japanese kokai publication sho 60-124438 communique

Patent documentation 6: the special fair 7-115119 communique of Japan

Patent documentation 7: Japanese kokai publication hei 6-122060 communique

Patent documentation 8: Japanese kokai publication hei 8-103861 communique

Patent documentation 9: Japanese kokai publication sho 57-31463 communique

Patent documentation 10: Japanese kokai publication hei 6-55255 communique

Patent documentation 11: Japanese kokai publication hei 6-226423 communique

Patent documentation 12: Japanese kokai publication hei 9-85421 communique

Patent documentation 13: Japanese kokai publication hei 4-147760 communique

Patent documentation 14: Japanese kokai publication sho 60-56439 communique

Patent documentation 15: the special fair 7-41400 communique of Japan

The present invention is in view of above prior art problems point, and a kind of only desired partially filled motlten metal of die cavity and the casting that it is solidified in mold cavity are provided.According to this invention, can establish casting, and the subsequent handling behind the somatotype is simplified significantly with high injection qualification rate.

(method 1)

A kind of casting, with proportion be the motlten metal of γ from mold top or the sidepiece gravity-assist pouring to the aeration mold, it is characterized in that, begin the cast with by gate part, running channel portion, the desired die cavity part of wanting to fill motlten metal among the die cavity of this aeration mold that goods portion constitutes, be that goods portion volume is about equally behind the motlten metal of volume, when the motlten metal of being poured into a mould is by gate part at last or by behind the gate part, promptly send into Compressed Gas from gate part, so that motlten metal can not be stuck in running channel portion and be filled into desired die cavity part swimmingly, and it is solidified.In this method, in order to make explanation simple, and think the die cavity of mold by gate part, running channel portion, emit oral area and goods portion to constitute.And the desired die cavity of wanting to fill motlten metal partly is goods portion.

At first cast partly is the motlten metal of the volume equal volume of goods portion with the desired die cavity of wanting to fill motlten metal in the die cavity of aeration mold.Motlten metal enters and partly is filled into running channel portion and goods portion from gate part.If keep like this, motlten metal is distributed to the various piece of die cavity and the motlten metal face that each die cavity partly forms sustained height, and not reaching of the present invention partly is the purpose that motlten metal is filled by goods portion at desired die cavity only.

So in the method, the suitable time after cast beginning is sent into Compressed Gas from gate part, by this pressure motlten metal is pressed into goods portion, to make it be filled into desired die cavity partly be goods portion and solidify.Because the volume of motlten metal and desired die cavity partly be goods portion volume about equally, partly be to fill motlten metal in the goods portion only thus to desired die cavity.

In order to pour into a mould the motlten metal with the volume volume about equally of desired die cavity part, can use little casting ladle that each mold is measured one by one and pours into a mould, also can from big casting ladle, measure the amount of 1 mold and pour into a mould.The motlten metal of so-called volume about equally means the come-up of the patrix of considering to follow cast and the thermal expansion of die cavity etc. and multiply by the volume of suitable safety coefficient.

As Compressed Gas, in general easy to use and cheap compressed air.In addition, the nitrogen etc. of activity of not having of compression has effect on the meaning of the oxidation that prevents motlten metal.

Send into Compressed Gas the time standby snorkel flange etc. block gate part and Compressed Gas do not leaked from gate part, this is very big to the effect of filling motlten metal.In addition, will fill motlten metal and be filled into effect the desired die cavity because can weaken Compressed Gas from the leakage of the outer peripheral face of mold, therefore passable words preferably can be implemented the countermeasure that some prevent the gas leakage on outer peripheral face.Certainly, under the low situation of the venting quality of mold, perhaps under the situation that the whole or part of mold is covered by airtight chamber or casting frame etc., there is no need to implement to prevent the measure of leaking gas.

The suitable time after the so-called cast of sending into Compressed Gas from gate part begins, preferably in cast beginning back, last motlten metal by as early as possible time after in the way of gate part.If supplied gas late because the motlten metal that is filled begin solidify, problems such as cold shut, cold shut, generation oxide take place easily.

So-called fill motlten metal and it is solidified and do not mean that the motlten metal that all are filled solidifies.Motlten metal partly flows out from desired die cavity, is because flow out near making desirable die cavity part that motlten metal fills and other die cavity portion boundary portion, gets final product so solidify near this boundary portion at least.In addition, it is to solidify fully that the solidifying of this part there is no need, and being able to prevent from the degree that desired die cavity partly flows out is that solid-phase crystallization is just passable.Expression in detail in embodiment 1.

(method 2)

In the casting of method 1 record, it is characterized in that, send into Compressed Gas, motlten metal being filled into desired die cavity part, and keep supplying gas of this Compressed Gas, so that motlten metal solidifies from gate part.

This method as the feature of method 1 make with compressed air motlten metal fill desired die cavity portion and the casting that makes it to solidify in, after making motlten metal fill desired die cavity portion, also keep supplying gas and motlten metal being solidified of Compressed Gas.By keeping supplying gas of Compressed Gas, make the motlten metal that is filled into desired die cavity part can be with the moulding pressure of Compressed Gas, and can make near the rapid solidification boundary portion under the cooling effect of Compressed Gas near the portion's backflow boundary portion.Expression in detail in embodiment 2.

(method 3)

In the casting method of putting down in writing in method 1 and method 2 any one, it is characterized in that, the moulding pressure of Compressed Gas is more than the value by the motlten metal static pressure γ H of height H decision, wherein, described height H is the height till from the inflow entrance of the motlten metal that leads to desired die cavity part to the topmost of desired die cavity part.

In this method, mold cavity by gate part, running channel portion, emit under the situation that oral area and goods portion constitute, to goods portion and emit oral area as the desired die cavity of wanting to fill partly and the casting of filling motlten metal describe.In order relatively to prevent to be filled into motlten metal in the desired die cavity part reliably, the moulding pressure of Compressed Gas is reached more than the motlten metal static pressure γ H value by the height decision till from the inflow entrance of the motlten metal that leads to desired die cavity part to the topmost of desired die cavity part from flowing out to running channel portion one side near the boundary portion.And γ is the proportion (kgf/cm of motlten metal 3), H is above-mentioned height (cm).Therefore, γ H is pressure (kgf/cm 2).

This motlten metal static pressure γ H represents to be filled into the motlten metal static pressure on the desired die cavity hydrodynamics of motlten metal when running channel portion one effluent goes out partly.Therefore, make the moulding pressure of Compressed Gas remain on the outflow that just can stop motlten metal on it.

The moulding pressure of Compressed Gas is not the contract pressure of gas of finger pressure, leak on the compressed-air actuated basis from gate part and mold outer surface in consideration, desired die cavity part die cavity part (the die cavity part that motlten metal does not fill up) is in addition reached more than the γ H.Expression in detail in embodiment 3.

(method 4)

In the casting method of putting down in writing in the method 1 to 3 any one, it is characterized in that, send into Compressed Gas from gate part, make motlten metal be filled into desired die cavity part, and use blocking mechanism, so that the motlten metal of filling can not reflux near this desired die cavity part and other the die cavity portion boundary portion.

In the method, for the motlten metal that prevents to be filled into desired die cavity part from going out and use some blocking means to the gate part effluent near the boundary portion.Expression in detail in embodiment 4.

(method 5)

In the casting of method 4 records, it is characterized in that,, use near the method for cooling boundary portion as the blocking means that the motlten metal that makes filling can not reflux.

In this method, go out to the gate part effluent in order to prevent the motlten metal of in desired die cavity part, being filled reliably, cooling off near the boundary portion and accelerated solidification.In method 2 and 3, the outflow of the motlten metal of filling and utilized the moulding pressure of Compressed Gas in order to prevent, but in the method, quicken solidifying of desired die cavity part by gas flow.Rapid solidification is the most effective near particularly making desired die cavity part and other portion boundary portion by gas flow.As gas, compressed air is the easiest cheap, but mainly is that the not dangerous any gas of gas is all applicable.In addition, the gas of low temperature also produces effect to quickening cooling.Expression in detail in embodiment 4 and 5.

(method 6)

In the casting of method 4 records, it is characterized in that,, use and mechanically interdict near the method for boundary portion as the blocking means that the motlten metal that makes filling can not reflux.

In this method, provide a kind of mechanically blocking to fill the desired die cavity part of motlten metal and the casting of other die cavity portion boundary portion.As blocking method, list near the method that mold sheet that shell moulded casting etc. obtains interdicts of passing through of for example boundary portion, laying the shape that meets this part, the blocking sheet method of interdicting is set near boundary portion, and baffle board is applied in interdict near the boundary portion the mold etc.Expression in detail in embodiment 6 to 8.

(method 7)

In the casting that method 1 is put down in writing to any one of method 6, it is characterized in that, before the cast or after the cast beginning, the desired die cavity that will want to fill motlten metal partly reduces pressure.

In this method, in cast, become easily, before cast and after the cast beginning, the desired die cavity of wanting to fill motlten metal is partly reduced pressure in order to make filling to desired die cavity part.As reducing pressure before cast, then Jiao Zhu motlten metal is attracted fast and is imported to desired die cavity part, can simplify the time of supplying gas of the Compressed Gas after cast begins and the control of pressure.In addition, the decompression after the cast beginning also with cast before decompression have the same purpose effect.

The difference of the decompression after beginning after decompression before the cast and the cast is, at first by the decompression before the cast, can make mold cavity keep stable decompression degree before cast, is accompanied by the beginning of cast, and the decompression degree of mold cavity changes.Decompression after the cast beginning is because be to begin cast under atmospheric state, so the initial stage liquid flowing ratio of cast is more stable, if evening time of decompression beginning, then has in the filling process of motlten metal the situation of degree of being reduced pressure fully.Therefore, use suitable scheme according to the material of motlten metal, the shape of mold cavity etc.

Though decompression can be carried out on the whole at mold, at least as long as desired die cavity is partly reduced pressure.And, after motlten metal is filled into desired die cavity part, keep decompression as required.Expression in detail in embodiment 9 and 10.

(method 8)

In the casting of being put down in writing in any one of method 1 to 6, it is characterized in that, before cast or after the cast beginning, the decompression degree that to want to fill the desired die cavity part of above-mentioned motlten metal is set at the decompression state of the value more than the absolute value of the motlten metal static pressure γ H that is determined by height H, wherein, described height H is the height till from the inflow entrance of the motlten metal that leads to this desired die cavity part to the topmost of desired die cavity part.

In this method, before the cast and after the cast beginning, make the decompression degree of wanting the desired die cavity part that motlten metal fills keep the decompression state of the above value of the absolute value of motlten metal static pressure γ H.Therefore, even do not send into Compressed Gas when cast, because decompression, motlten metal also can be filled to the topmost of desired die cavity part, and also can not flow out near the boundary portion after filling.Therefore, the effect of the Compressed Gas of sending into after the cast beginning mainly is to flow out and the effect of the cooling that produces by gas flow by auxiliary the preventing that pressure produces, and the stability of casting integral body is improved.And, make motlten metal be filled into desired die cavity part after, also should keep decompression state as required.Expression in detail in embodiment 9.

(method 9)

In the casting of putting down in writing in any one of method 1 to 6, it is characterized in that, before cast or after the cast beginning, to want to fill out the decompression state that the decompression degree of stating the desired die cavity part of filling motlten metal is set at the value lower than the absolute value of the motlten metal static pressure γ H that is determined by height H, wherein, described height H is the height till from the inflow entrance of the motlten metal that leads to this desired die cavity part to the topmost of desired die cavity part.

In the method, make before the cast and cast beginning afterwards wants to fill the decompression state of the desired die cavity decompression degree partly of the motlten metal value lower than the absolute value of motlten metal static pressure γ H.Thus, if make the decompression degree of desired die cavity part be higher than the absolute value of γ H, be easy to generate the scab of sand and the adverse consequences such as turbulent flow of motlten metal by decompression according to the shape of motlten metal material and mold cavity etc.Under such situation, preferred, the method for burning etc. is filled and can not produced to (weak) decompression degree by the value lower than the absolute value of γ H as this method and the compound action of the pressurization of the gas that contracts imperturbably.And motlten metal keeps decompression after filling desired die cavity part as required.Expression in detail in embodiment 10.

The invention effect:

Compare with existing casting, can obtain following effect by the present invention.

That is, whatsoever the existing casting of sample is because motlten metal has been filled all parts of mold cavity, lower with the cast qualification rate that goods portion weight/full poured weights is represented.To this, according to the present invention since can be only to the partially filled motlten metal of desired die cavity and make it to solidify, so the cast qualification rate improves significantly.Its result saves the required motlten metal of cast product significantly.

In addition, because motlten metal only is filled in desired die cavity part, when solidifying the back somatotype, only need desired die cavity is partly done the taking-up processing so become, and subsequent handling significantly reduces.

In sum, can obtain following effect by the present invention.(1) effect that significantly reduces motlten metal can be reached by significantly improving the cast qualification rate, the fusion cost of energy can be cut down.(2) the number of working processes in the time of can significantly cutting down somatotype.(1) and the effect of (2) finally can be to CO as worldwide problem 2Reduction contribute.

Description of drawings

The figure of state of Fig. 1 after for the cast of expression embodiments of the invention 1.

Fig. 2 is the figure that supplies gas of the Compressed Gas of expression embodiments of the invention 1.

The figure of state of Fig. 3 after for the cast of expression embodiments of the invention 2.

Fig. 4 is the figure that supplies gas of the Compressed Gas of expression embodiments of the invention 2.

The figure of state of Fig. 5 after for the cast of expression embodiments of the invention 3.

Fig. 6 is the figure that supplies gas of the Compressed Gas of expression embodiments of the invention 3.

Fig. 7 is the figure of expression embodiments of the invention 4.

Fig. 8 is the figure of expression embodiments of the invention 5.

The figure of state of Fig. 9 after for the cast of expression embodiments of the invention 6.

Figure 10 is the figure that supplies gas of the Compressed Gas of expression embodiments of the invention 6.

Figure 11 is the figure of the preceding state of the cast of expression embodiments of the invention 7.

The figure of state of Figure 12 after for the cast of expression embodiments of the invention 7.

Figure 13 is the figure of expression embodiments of the invention 8.

Figure 14 is the figure of the preceding state of the cast of expression embodiments of the invention 9.

The figure of state of Figure 15 after for the cast of expression embodiments of the invention 9.

The figure that supply gas of Compressed Gas of Figure 16 after for the cast of the expression embodiment of the invention 9.

Figure 17 is the figure of the preceding state of the cast of expression embodiments of the invention 10.

The figure of state of Figure 18 after for the cast of expression embodiments of the invention 10.

Figure 19 another figure of state after for the cast of expression embodiments of the invention 10.

Reference numeral

1 mold

2 upper ledges

3 lower frames

4 die holders

5 mo(u)ld top halves

6 mo(u)ld bottom halves

7 mold cavities

8 water the road junction

9 running channel portions

10 emit oral area

11 goods portions

12 desired die cavity parts

13 pouring ladles

14 motlten metals

15 compression sets

16 Compressed Gas

17 seal members

18 coating members

Near 19 boundary portion

20 other die cavity parts

21 passages

22 snorkels

23 valves

24 mold sheets

25 depressed parts

26 blocking sheets

27 baffle boards

28 decompressors

29 decompression wind scoops

The motlten metal of 30 cast

31 seal members

32 foamed resin plates

The specific embodiment

The present invention can implement by the method for method 1 any one to the method 9, preferential mode is, using method 7, before cast and after the cast beginning, the desired die cavity of wanting to fill motlten metal is partly reduced pressure and the volume of cast and the desired die cavity part motlten metal of volume about equally, send into Compressed Gas and make motlten metal be filled into desired die cavity part from gate part apace afterwards, keep near the casting of supplying gas and boundary portion, solidifying of decompression and Compressed Gas.The shape of consideration motlten metal material, mold cavity, founding method etc. decide the pressure of decompression degree and Compressed Gas.

By following examples the present invention is described in detail, but the present invention is not limited to these embodiment.

Embodiment 1

Fig. 1 and Fig. 2 represent embodiment 1.In the present embodiment to using method 1, in the die cavity of aeration mold, begin to pour into a mould and the volume of the desired die cavity part of wanting to fill motlten metal about equally behind the motlten metal of volume, send into Compressed Gas and make motlten metal be filled into desired die cavity part and its casting that solidifies is described from gate part.

At first the formation to mold 1 describes, and mold 1 is a sand mold, carries out moulding in upper ledge 2 and lower frame 3, is positioned over behind the matched moulds on the die holder 4.Mold cavity 7 is made of gate part 8, running channel portion 9 and goods portion 11.In general be provided with emitted oral area more between running channel portion 9 and the goods portion 11, but this situation is not for being provided with the situation of the mold that emits oral area.

In the present embodiment, motlten metals itself are filled by the goods portion 11 that the conduct in mold cavity 7 is only wanted to fill the desired die cavity part 12 of motlten metal and the castings that make it to solidify describe.Fig. 1 is illustrated in the motlten metal casting ladle 13 to add with the roughly isopyknic motlten metal of goods portion 11 of the desired die cavity part 12 of wanting to fill motlten metal and with it and is poured into the state of mold 1.Because the motlten metal 30 of cast and goods portion 11 volumes are about equally, thus can not fill up whole die cavity, and just a part is filled into goods portion 11, a part is stuck in running channel portion 9.In addition because gate part 8 does not have motlten metal head (molten Soup ヘ Star De) basically, it is minimum to make the motlten metal 30 of cast be filled into the driving force of goods portion 11.Therefore, such state is following or can not fully motlten metal 30 complete filling of having poured into a mould be arrived goods portion 11, perhaps needs for a long time, and the result produces defective products.

Therefore, as shown in Figure 2, will send into by the Compressed Gas 16 that compression set 15 is compressed in the present embodiment,, the motlten metal 30 that is stuck in running channel portion 9 will be filled in the goods portion 11 by the effect of this pressure from the top of gate part 8.In the present embodiment, Compressed Gas uses compressed air, and pressure is 5kgf/cm 2, air quantity is 60l/sec.The position of sending into Compressed Gas 16 is provided for preventing the seal member 17 of gas leakage.Because water fluence be and goods portion volume amount about equally, so 30 of final motlten metals are filled desired die cavity part 12, are goods portion 11.Afterwards, the motlten metal 30 that is filled is solidified.

And, there is no need when sending into Compressed Gas 16 to wait until that motlten metal is stuck in the running channel portion 9 as described above.State after the stagnation of the motlten metal of Fig. 1 is the state that illustrates for principle of the present invention is described, is not optimum embodiment of the present invention.That is, because if dead time is longer, molten metal temperature can reduce so, and the probability that bad problems such as cold shut, cold shut, generation oxide take place increases, thus after the cast beginning, last motlten metal during by gate part or by after supply gas rapidly to good.Like this, motlten metal can not be stuck in running channel portion 9 and be filled into swimmingly in the desired die cavity part 12.This is an enforcement embodiment of the present invention.Even in the explanation of following embodiment, also be the same for the time of sending into Compressed Gas after the cast beginning.

Like this, just can be only in mold cavity desired die cavity part, be that goods portion fills motlten metal and it is solidified.And,,, perhaps also can supply gas a little and solidify so after motlten metal is filled into goods portion, also can stop to send into of Compressed Gas because the situation of present embodiment is in the mo(u)ld bottom half for goods portion.

Here said solidifying refers to that broadly desired die cavity partly is, goods portion all solidifies, and refer to that narrowly desired die cavity part and other die cavity portion boundary department enclosure solidify, and the motlten metal that is filled can not go out to the running channel effluent.Further describe, the solidifying of so-called narrow sense is meant near the boundary portion the motlten metal that solid-phase crystallization reaches can not liquidity up to motlten metal.That is, purpose of the present invention for only to the partially filled motlten metal of desired die cavity and it is solidified, for just fill and solidify and the whole bag of tricks taked to proceed at least on the narrow sense meaning solidify passable.Following embodiment is also identical.

And, when sending into Compressed Gas, because mold has aeration, so thereby the part of gas reduces the effect of filling motlten metal from revealing between the mold particle.Consider this problem and the pressure of Compressed Gas and air quantity are suitably regulated and can be carried out filling effect fully.In addition, as required, it also is effective using non-aeration parts covering mold to reduce aeration.

Compressed Gas in general compressed air is the easiest cheap.It also is effective that other compressed nitrogens etc. are not had the gas etc. of activity.In addition, the leak tightness of the pressure of decision Compressed Gas and the venting quality that air quantity will be considered mold, the shape of casting frame, integral body and founding method etc.

According to present embodiment, the method for filling the whole die cavity of mold in the existing casting becomes can only fill desired die cavity part and the method that it is solidified.Its result increases substantially with the cast qualification rate that goods portion weight/full poured weights is represented.For example, original qualification rate 50-70% is become about 100%.This is significantly to save due to the motlten metal.

In addition, according to present embodiment, motlten metal only is filled into goods portion, is not filled into gate part and running channel portion.Therefore, only need take out goods portion itself when solidifying the back somatotype and get final product, can cut down the number of working processes significantly.

Embodiment 2

Fig. 3 and Fig. 4 represent embodiment 2.In the present embodiment to using method 2, after cast beginning, send into Compressed Gas and motlten metal be filled into desired die cavity part, keep the casting of supplying gas and motlten metal being solidified of this Compressed Gas to describe.

Fig. 3 represents the state behind the casting molten metal 30 in as the goods portion 11 of desired die cavity part 12.The formation of mold 1 and die cavity 7 is identical with embodiment 1, and the top of upper ledge 2 is for airtight and mounting has coating member 18 made of iron.This coating member 18 is provided with for more effective the playing a role of pressure that makes Compressed Gas.Though coating member 18 preferred non-ventilation type materials, the material lower than mold aeration also can obtain same effect.

Expression is the same among state after the cast of Fig. 3 and the embodiment 1, and watering fluence is goods portion 11 only, because there is not the motlten metal head of gate part 8 basically, so the part of motlten metal 30 is filled into goods portion 11, a part is stuck in running channel portion 9.

Next as shown in Figure 4, will send into from the top of gate part 18 by the Compressed Gas 16 that compression set 15 is compressed, the motlten metal 30 of the portion of the same running channel with embodiment 19 is filled into goods portion 11 under the effect of Compressed Gas 16.Under the situation of present embodiment, because mounting is used for airtight coating member 18 on the top of upper ledge 2, Compressed Gas 16 from the leakage of mold 1 seldom, the pressure of Compressed Gas 16 is compared with the situation of embodiment 1, plays in more effectively motlten metal 30 being filled the effect of goods portion 11.

Motlten metal 30 also keeps supplying gas of Compressed Gas 16 and applies suitable pressurization after goods portion 11 fills.Thus, the motlten metal 30 that is filled can not flow out and solidify from goods portion 11.Set the force value and the airflow value of suitable Compressed Gas 16 according to the kind of mold, founding method etc.

According to present embodiment, can more stably carry out to advancing partially filled motlten metal of desired die cavity and solidifying thereafter than embodiment 1.

And the time of sending into Compressed Gas is such shown in embodiment 1, there is no need to wait until that motlten metal is stuck in the running channel portion as described above.Practical embodiment is, after the cast beginning, last motlten metal during by gate part or by after promptly supply gas, make motlten metal can not be stuck in running channel portion and be filled into desired die cavity part swimmingly.

Embodiment 3

Fig. 5 and Fig. 6 represent embodiment 3.Present embodiment is to using method 3, a desired die cavity part partly of wanting to fill is arranged in mo(u)ld top half, having under the situation of certain altitude, stipulate the moulding pressure of Compressed Gas clearly, and make motlten metal be filled into desired die cavity part and the casting that solidifies describes.

As shown in Figure 5, the formation of mold 1 and embodiment 2 are roughly the same, mold cavity 7 by gate part 8, running channel portion 9, emit oral area 10 and goods portion 11 to constitute.Goods portion 11 is configured in mo(u)ld top half 5 and the mo(u)ld bottom half 6 in addition and the height of mo(u)ld top half part is H.In the present embodiment, with goods portion 11 with emit oral area 10 to fill motlten metals and it is solidified as desired die cavity part 12.Above-mentioned height H is suitable with the height of the inflow position of the motlten metal that leads to desired die cavity part 12.

Fig. 5 is cast and desired die cavity part 12 state behind the motlten metal 30 of volume about equally.Identical with embodiment 1,2, because water fluence, there is not the motlten metal head of gate part 8 substantially for only filling the amount of desired die cavity part 12, motlten metal 30 is partly filled the whole die cavity and the degree that is up to the standard.

So, as shown in Figure 6, send into Compressed Gas 16 from the top of gate part 8, the same with embodiment 1,2, motlten metal 30 is filled into desired die cavity part 12.Afterwards, keep supplying gas and motlten metal 30 being solidified of Compressed Gas 16.To be set at based on the moulding pressure of this Compressed Gas 16 more than the γ H in the present embodiment.Wherein, γ is the proportion (kgf/cm of motlten metal 3), H is for from leading to position that desired die cavity part 12 the flows into motlten metals height (cm) till the topmost of desired die cavity part 12.So γ H is pressure (kgf/cm 2).For example, with proportion γ=7 * 10 -3Kgf/cm 3The cast iron motlten metal be filled under the situation in the mold cavity of H=20cm γ H=0.14kgf/cm 2

The meaning of γ H is the motlten metal 30 of filling in the desired die cavity part 12 near the 19 static pressure pressure that go out to the running channel portion 9 one effluents boundary portion of desired die cavity part 12 and other die cavity part 20.Therefore, if make the moulding pressure that produced by the Compressed Gas more than the γ H 16 affact near the boundary portion 19 from running channel portion 9 sides, motlten metal 30 is filled to the topmost of desired die cavity part 12.And, if keep this moulding pressure, can prevent the outflow of the motlten metal 30 that is filled.And the moulding pressure that so-called γ H is above does not also mean that the pressure of Compressed Gas, but means and considered Compressed Gas 16 from the basis of the leakage of mold 1, and 19 pressure is remained on more than the γ H.

As shown in this embodiment, be positioned in the desired die cavity part of wanting to fill 12 under the situation of position of the inflow entrance that is higher than motlten metal, if by having pressure by the such Compressed Gas 16 of the proportion γ of motlten metal and the moulding pressure more than the determined γ H of height H, fill motlten metal 30 to desired die cavity part 12, and keep this moulding pressure and it is solidified, then can access only promptly to desired die cavity part 12, goods portion 11 and emit oral area 10 to fill the mo(u)lding of motlten metals, wherein, described height H is the height till from the inflow position of the motlten metal that leads to desired die cavity part 12 to the topmost of desired die cavity part 12.

And the time of sending into Compressed Gas there is no need to wait until that motlten metal is stuck in the running channel portion as shown in Figure 5 shown in embodiment 1,2.Practical embodiment is: after the cast beginning, last motlten metal during by gate part or by after promptly supply gas, make motlten metal can not be stuck in running channel portion and be filled into desired die cavity part swimmingly.

Embodiment 4

Fig. 7 represents embodiment 4.Present embodiment is to using method 4 and 5, send into Compressed Gas and to the partially filled motlten metal of desired die cavity in cast beginning back from gate part, and will desired die cavity part and other die cavity portion boundary portion near cool off and the casting that solidifies describes.

Fig. 7 is cast and desired die cavity part 12 about equally behind the motlten metal 30 of volume, sends into the state of Compressed Gas 16 from the top of gate part 8.By supplying gas of Compressed Gas 16, motlten metal 30 is filled into desired die cavity part 12, is goods portion 11 and emits oral area 10.The formation of mold 1 and embodiment 3 are roughly the same, but 19 top is provided with passage 21 near the boundary portion of desired die cavity part 12 and other die cavity part 20.

Illustrate by of the effect of this structure present embodiment.After the cast beginning, after sending into Compressed Gas 16 and motlten metal 30 being filled into desired die cavity part 12, if continue to be fed into Compressed Gas 16, then Compressed Gas 10 cools off this part in the time of near the heat of absorbing boundary portion 19 by good passage 21 outflows of aeration.Its result, near boundary portion 19 is cooled fast and solidifies.Thus, can shorten supplying gas the time of Compressed Gas 16.That is, utilize Compressed Gas 16 can play the effect and the cooling effect of filling motlten metal 30.

And even passage 21 is not set, if keep supplying gas of Compressed Gas 16, then Compressed Gas 16 passes between the mold particle and flows out, so can make near the 19 coolings boundary portion with certain speed.But present embodiment cooling capacity height is so can make it solidify apace.

As mentioned above, by passage being set and by making its rapid solidification near the Compressed Gas cooling boundary portion, can shorten that motlten metal is filled into the time of supplying gas after the desired die cavity part, that keep Compressed Gas, the present invention can improve the production efficiency under the situation that is applied to the actual production line.

Embodiment 5

Figure 8 shows that embodiment 5, present embodiment is identical with embodiment 4, to using method 4 and 5, send into Compressed Gas and to the partially filled motlten metal of desired die cavity in cast beginning back from gate part, and utilize Compressed Gas with should desired die cavity part and other die cavity portion boundary portion near the casting that cools off describe.

Fig. 8 represents to pour into a mould and desired die cavity part 12 about equally behind the motlten metal 30 of volume, sends into the state of Compressed Gas 16 from the top of gate part 8.By supplying gas of Compressed Gas 16, motlten metal 30 is filled into desired die cavity part 12, is goods portion 11 and emits oral area 10.The formation of mold 1 and embodiment 4 are roughly the same, and 10 top is provided with passage 21 near the boundary portion of desired die cavity part 12 and other die cavity part 20.In the present embodiment, gate part 8 other mountings have snorkel 22, so that also can send into Compressed Gas 16 from the top of passage 21.In this snorkel 22 valve 23 is set.

To using this structure that the effect of present embodiment is described.After to desired die cavity part 12, filling motlten metal 30 by the Compressed Gas of sending into from gate part 8, open the valve 23 of the snorkel 22 on passage 21 tops, Compressed Gas 16 is sent into passage 21.Thus, by two supplying gas, can make near the 19 coolings fast boundary portion from gate part 8 with from this of passage 21.Thus, the same with embodiment 4, can shorten that motlten metal 30 is filled into time of sending into Compressed Gas 16 after the desired die cavity part 12, the present invention can improve the production efficiency that is applied under the actual production line situation.

Embodiment 6

Fig. 9 and 10 expression embodiment 6.Present embodiment is to using method 4 and 6, send into Compressed Gas from gate part, and make motlten metal be filled into the desired die cavity part of desired filling, near the casting that carries out the machinery blocking this desired die cavity part and other the die cavity portion boundary portion is described.

Fig. 9 represents to pour into a mould and desired die cavity part 12 state behind the motlten metal 30 of volume about equally.After the cast, drop into the mold sheet 24 of shell moulded casting (シ エ Le モ one Le De) from gate part 8 in the present embodiment.Afterwards, as shown in figure 10, send into Compressed Gas 16, fill motlten metals 30 to desired die cavity part 12 from gate part 8, and with mold sheet 24 by being pressed near the boundary portion 19.Because 19 the shape and the shape of mold sheet 24 are consistent near the boundary portion, so the outflow of motlten metal 30 is interdicted by it.Solidifying rapidly with mold sheet 24 contacted parts of motlten metal 30 can be shortened the retention time of Compressed Gas 16.And though the sand mold simple cheap of the shell moulded casting of mold sheet 24 etc., the refractory material littler than motlten metal proportion also has same effect.

By present embodiment, can interdict the motlten metal that is filled and it is solidified rapidly, the present invention can improve the production efficiency that is applied under the actual production line situation.

Embodiment 7

Figure 11 and Figure 12 represent embodiment 7.Present embodiment is sent into Compressed Gas and is made motlten metal be filled into desired die cavity part from gate part also to using method 4 and 6, and near the casting that carries out the machinery blocking this desired die cavity part and other the die cavity portion boundary portion is described.

Figure 11 represents to pour into a mould and desired die cavity part 12 state before the motlten metal 14 of volume about equally.In the present embodiment, in 19 the mo(u)ld bottom half depressed part 25 is set near the boundary portion of mold cavity 7, shell-molded blocking sheet 26 here is set.

After Figure 12 represents cast beginning, carry out supplying gas and solution 30 being filled into the state of desired die cavity part 12 of Compressed Gas 16.After filling motlten metal 30, the blocking sheet 26 that is provided with in the depressed part 25 interdicts motlten metal 30 because of the buoyancy come-up with tight contact the in running channel top of this part.Near the effect that blocking sheet 26 has the effect of the outflow that prevents motlten metal 30 and accelerates the boundary portion 19 cooling by contacting molten metal 30.Thus, can shorten supplying gas the time of Compressed Gas 16, the present invention can improve the production efficiency that is applied under the actual production line situation.

Embodiment 8

Figure 13 represents embodiment 8.Present embodiment is also to using method 4 and 6, send into Compressed Gas and make motlten metal be filled into desired die cavity part from gate part, near the casting that carries out the blocking of machinery this desired die cavity part and other the die cavity portion boundary portion is described.

After Figure 13 represents to begin to pour into a mould motlten metal 30 with desired die cavity part 12 roughly the same volumes, send into Compressed Gas 16 and solution 30 is filled into the state of desired die cavity part 12.In the present embodiment, 19 top is provided with passage 21 near boundary portion, after motlten metal is filled, makes baffle board 27 near passage 21 extends through boundary portion 19 the mold and interdict motlten metal 30.And the shape of passage 21 for matching of this situation with baffle board 27.

In the present embodiment, behind the filling motlten metal 30, make baffle board 27 directly be through to the outflow that can prevent motlten metal 30 near the boundary portion 19, there is no need to wait for and solidify, can after blocking, stop to supply gas of Compressed Gas 16 at once.Therefore, the present invention can improve the production efficiency that is applied under the actual production line situation.

Show the such method of embodiment 6 to 8 as near the method the blocking boundary portion of method 6, mainly finger will be blocked the motlten metal of being filled near the outflow the boundary portion with some suitable barriers, also same action effect can be arranged with other method.

Embodiment 9

Figure 14 to Figure 16 represents embodiment 9.In the present embodiment, to using method 7 and method 8,, and after cast, also reduce pressure as required before cast or cast beginning back decompression for the motlten metal that makes cast is filled into desired die cavity part apace, and describe from the casting that gate part is sent into Compressed Gas.

Figure 14 represents to pour into a mould the state before the motlten metal 14 with desired die cavity part 12 roughly the same volumes.Mold 1 to be configured in desired die cavity part 12 be that the top of goods portion 11 and the die cavity that emits oral area 10 respectively is provided with 1 passage 21.And, the decompression wind scoop 29 that setting is connected with decompressor 28 on upper ledge 2.Passage 21 can play desired die cavity part 12 is carried out powerful depressurization, can stably keep the mechanism of the decompression degree of defined.But this passage is not an indispensable key element of the present invention, as long as make desired die cavity partly reach the decompression degree of regulation.

From mo(u)ld top half 5 decompressions, the decompression degree of desired die cavity part 12 is reached more than the absolute value of γ H by this structure.Here γ is the proportion of motlten metal, H be from motlten metal to position that desired die cavity part 12 flows into the height till the topmost of desired die cavity part 12.H height with the cope portion of goods portion 11 under the situation of present embodiment is suitable.γ H makes near the motlten metal static pressure of motlten metal 30 from flowing out the boundary portion of filling in the desired die cavity part 12.

State after Figure 15 represents to pour into a mould.Because desired die cavity part 12 is depressurized to more than the γ H, the motlten metal of being poured into a mould 30 is filled into the topmost of desired die cavity part 12 swimmingly.After the cast beginning, because gate part 8 is opened in the atmosphere, so the decompression degree changes.So as shown in figure 16, send into Compressed Gas 16 from the top of gate part 8 and the motlten metal that prevents to be filled from 19 flowing out near the boundary portion, and near the cooling effect lower boundary portion of Compressed Gas 16,19 cool off rapidly and solidify.

As required, motlten metal is filled into desired die cavity part back continues the decompression of maintenance, until solidifying by decompressor.Promptly, before cast or after the cast beginning, reduce pressure, make motlten metal be filled into desired die cavity part swimmingly, afterwards, under the effect of Compressed Gas, prevent that motlten metal from flowing out near the boundary portion, by keeping decompression, the heat of mold is attracted discharge, and can make solidifying phase to carrying out quickly.

And can also there be same action effect the time of decompression beginning after the cast beginning as present embodiment before cast.But, different with the variation of the decompression degree of pouring into a mould beginning back mold cavity before cast.That is, the decompression by before pouring into a mould can make mold cavity reach stable decompression degree before cast, is accompanied by the beginning of cast, and the decompression degree of mold cavity changes.Because begin cast under atmospheric state, so stable at cast initial stage liquid stream, if the time of decompression beginning late, the decompression after the cast beginning exists in the filling process of motlten metal and can not get the situation of degree of decompression fully so.Therefore, use some suitable methods according to the material of motlten metal, the shape of mold cavity etc.

As described above,, can carry out relatively stablely, and can make to solidify fast and carry out to the partially filled motlten metal of desired die cavity by reducing pressure and the combination of supplying gas of Compressed Gas.

Embodiment 10

Figure 17 and Figure 18 represent embodiment 10.In the present embodiment, to using method 7 and method 9, for filling desired die cavity part apace, the motlten metal that makes cast before cast, reduces pressure with low (weak) decompression degree, and after making motlten metal be filled into desired die cavity part, also reduce pressure as required, and describe from the casting that gate part is sent into Compressed Gas.

Figure 17 represents to pour into a mould the state before the motlten metal 14 with desired die cavity part 12 roughly the same volumes.The structure of mold 1 and decompressor 28 and embodiment 9 are roughly the same.The passage of mold is not set in the present embodiment.The decompression degree of desired die cavity part 12 with the value of the absolute value than γ H low (weak) reduced pressure before cast by this structure.The motlten metal of being poured into a mould 30 is imported in the post-decompression desired die cavity part 12 swimmingly.But, because the decompression degree is lower than the absolute value of γ H, so motlten metal 30 can not be filled to the topmost of desired die cavity part 12.

Therefore as shown in figure 18, send into Compressed Gas 16 from the top of gate part 8 and make motlten metal 30 be filled into the topmost of desired die cavity part 12.Afterwards, portion 19 solidifies near making boundary portion under this state.Keep decompression as required.To carry out in order making to solidify as soon as possible, to keep decompression or strengthen decompression for well.And no matter the time of decompression beginning before cast or after the cast beginning, all have same action effect.

Making the decompression degree lower than the absolute value of γ H in the present embodiment, is because according to motlten metal material, cavity shape, founding method etc., spends the harm such as chaotic or generation oxide of high meeting generation molten metal flow if reduce pressure.Under these circumstances, as present embodiment, be preferably, solution imported desired die cavity part imperturbably, solution is filled into desired die cavity part and makes it to solidify with the effect of supplying gas of Compressed Gas with low decompression degree.

In addition among Figure 19 in the expression present embodiment with goods portion, emit oral area and running channel portion occupied state as the motlten metal of the situation of the desired die cavity part of filling solution.The operation of cast, decompression and pressurization is identical with above-mentioned explanation.Under this situation, because the motlten metal amount of filling increases, so the cast qualification rate is low, even but not noting the measuring accuracy of the motlten metal amount of pouring into a mould, also can be goods portion or goods portion and emit and fill motlten metal between the oral area like clockwork the essence part of casting.Even water under the situation of fluence because there is not gate part, so can realize improving the cast qualification rate about 10-15% at this.

In addition, when carrying out the casting of a plurality of fillers, as as shown in Figure 17,18, only be goods portion and emit under the situation of oral area for the desired die cavity part of filling motlten metal, for being necessary the motlten metal of cast is distributed to other goods portion of a plurality of branches and the needs that emit oral area as far as possible fifty-fifty, as shown in Figure 19 have like that following a bit: desired die cavity partly for goods portion, emit under the situation of oral area and running channel portion, do not need substantially to consider solution is distributed equably.

So, suitably setting the desired die cavity of filling motlten metal according to the reply situation partly gets final product.For example can be with goods portion, emit the part of oral area and running channel portion to be set at desired die cavity part.In addition, under the situation of not emitting oral area, also the part of goods portion and running channel portion can be set at the part of desired die cavity.This is effectively same under all situations of embodiment 1 to embodiment 10.

According to embodiment 9 and 10, by supplying gas of combination decompression and Compressed Gas, can implement more stablely to the partially filled motlten metal of desired die cavity with solidify.

Claims (8)

1. casting, with proportion be the motlten metal of γ from mold top or the sidepiece gravity-assist pouring to the aeration mold, it is characterized in that, begin the cast with by gate part, running channel portion, the desired die cavity part of wanting to fill motlten metal among the die cavity of this aeration mold that goods portion constitutes, be that goods portion volume is about equally behind the motlten metal of volume, when the motlten metal of being poured into a mould is by gate part at last or by behind the gate part, promptly send into Compressed Gas from gate part, so that motlten metal can not be stuck in running channel portion and be filled into desired die cavity part swimmingly, and it is solidified.
2. casting, with proportion be the motlten metal of γ from mold top or the sidepiece gravity-assist pouring to the aeration mold, it is characterized in that, begin the cast with by gate part, running channel portion, emit the desired die cavity part of wanting to fill motlten metal among the die cavity of this aeration mold that oral area and goods portion constitute, promptly emit oral area and goods portion volume about equally behind the motlten metal of volume, when the motlten metal of being poured into a mould is promptly by gate part at last or by behind the gate part, promptly send into Compressed Gas from gate part, the moulding pressure of Compressed Gas is more than the value by the motlten metal static pressure γ H of height H decision, wherein, the height of described height H till for topmost from the inflow entrance of the motlten metal that leads to above-mentioned desired die cavity part to above-mentioned desired die cavity part, so that motlten metal can not be stuck in running channel portion and be filled into desired die cavity part swimmingly, and it is solidified.
3. casting as claimed in claim 1 or 2, it is characterized in that, send into Compressed Gas from gate part, make motlten metal be filled into above-mentioned desired die cavity part, and use the blocking means, so that the motlten metal of filling can not reflux near this desired die cavity part and other the die cavity portion boundary portion.
4. casting as claimed in claim 3 is characterized in that, as the blocking means that the motlten metal that makes above-mentioned filling can not reflux, uses near the means of cooling boundary portion.
5. casting as claimed in claim 3 is characterized in that, as the blocking means that the motlten metal that makes above-mentioned filling can not reflux, uses and mechanically interdicts near the means of boundary portion.
6. casting as claimed in claim 1 is characterized in that, before the cast or after the cast beginning, the desired die cavity that will want to fill above-mentioned motlten metal partly reduces pressure.
7. casting as claimed in claim 1, it is characterized in that, before cast or after the cast beginning, the decompression degree that to want to fill the desired die cavity part of above-mentioned motlten metal is set at the decompression state of the value more than the absolute value of the motlten metal static pressure γ H that is determined by height H, wherein, described height H is the height till from the inflow entrance of the motlten metal that leads to this desired die cavity part to the topmost of desired die cavity part.
8. casting as claimed in claim 1, it is characterized in that, before cast or after the cast beginning, to want to fill out the decompression state that the decompression degree of stating the desired die cavity part of filling motlten metal is set at the value lower than the absolute value of the motlten metal static pressure γ H that is determined by height H, wherein, described height H is the height till from the inflow entrance of the motlten metal that leads to this desired die cavity part to the topmost of desired die cavity part.
CN2006800339692A 2005-09-15 2006-08-15 Casting method CN101262968B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2005268163A JP4150764B2 (en) 2005-09-15 2005-09-15 Casting method
JP268163/2005 2005-09-15
PCT/JP2006/316041 WO2007032174A1 (en) 2005-09-15 2006-08-15 Casting method

Publications (2)

Publication Number Publication Date
CN101262968A CN101262968A (en) 2008-09-10
CN101262968B true CN101262968B (en) 2011-06-08

Family

ID=37864772

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2006800339692A CN101262968B (en) 2005-09-15 2006-08-15 Casting method

Country Status (5)

Country Link
US (1) US20090151887A1 (en)
EP (1) EP1944105A1 (en)
JP (1) JP4150764B2 (en)
CN (1) CN101262968B (en)
WO (1) WO2007032174A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4524691B2 (en) * 2007-06-07 2010-08-18 新東工業株式会社 Mold decompression method
JP4888796B2 (en) * 2009-05-22 2012-02-29 有限会社ファンドリーテック・コンサルティング Casting method
JP5414063B2 (en) * 2010-03-29 2014-02-12 新東工業株式会社 Casting method, sand mold, and casting apparatus.
CN102941334B (en) * 2012-11-27 2015-07-01 山东圣泉新材料股份有限公司 Casting pressurizing system and casting pressurizing method
CN105339110B (en) * 2013-06-20 2017-12-22 日立金属株式会社 Cast the manufacture method of article
CN105324197B (en) * 2013-06-20 2018-11-06 日立金属株式会社 Cast manufacturing method, the casting device of article
JP6198125B2 (en) * 2013-08-30 2017-09-20 日立金属株式会社 Manufacturing method of casting article
CN105592960B (en) * 2013-09-30 2018-01-19 日立金属株式会社 The manufacture method of the casting of casting device and the use casting device
CN106061650B (en) * 2014-02-28 2018-02-16 日立金属株式会社 Cast the manufacture method and gas permeability casting mold of article
JP5663800B1 (en) * 2014-04-08 2015-02-04 有限会社ファンドリーテック・コンサルティング Runway and casting method capable of rapid solidification
JP6583603B2 (en) * 2014-09-30 2019-10-02 日立金属株式会社 Manufacturing method of casting article
EP3225332B1 (en) * 2014-11-26 2020-01-01 Sintokogio, Ltd. Automatic pouring machine and method for automatically pouring that have ability to pressurize
KR20180079369A (en) 2015-11-04 2018-07-10 히타치 긴조쿠 가부시키가이샤 Casting apparatus and casting method
CN105817603A (en) * 2016-04-26 2016-08-03 安徽纯启动力机械有限公司 Shrinkage-prevention die casting die
CN105855508A (en) * 2016-06-14 2016-08-17 吴江市液铸液压件铸造有限公司 Driving motor die of engine
US20180029113A1 (en) * 2016-07-29 2018-02-01 GM Global Technology Operations LLC Direct squeeze casting
CN107838379A (en) * 2017-12-05 2018-03-27 李理 A kind of Casting Equipment of automobile engine cylinder-body for automobile making
CN108256239B (en) * 2018-01-23 2020-07-10 华中科技大学 Prediction method suitable for cold shut defect in casting and mold filling process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297610A (en) * 1989-05-16 1994-03-29 Mazda Motor Corporation Pressure casting method and apparatus
CN1164837A (en) * 1995-08-28 1997-11-12 埃森沃克布鲁赫股份有限公司 Method of producing light metal castings and casting mould for carrying out method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716727A (en) * 1993-06-30 1995-01-20 Toyota Motor Corp Vacuum casting method
JP2003170226A (en) 2001-12-06 2003-06-17 Mitsubishi Heavy Ind Ltd Apparatus and method for bending pipe
US7279128B2 (en) * 2002-09-13 2007-10-09 Hi T.E.Q., Inc. Molten metal pressure pour furnace and metering valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297610A (en) * 1989-05-16 1994-03-29 Mazda Motor Corporation Pressure casting method and apparatus
CN1164837A (en) * 1995-08-28 1997-11-12 埃森沃克布鲁赫股份有限公司 Method of producing light metal castings and casting mould for carrying out method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP昭57-32869A 1982.02.22
JP昭63-41352U 1988.03.18

Also Published As

Publication number Publication date
WO2007032174A1 (en) 2007-03-22
JP4150764B2 (en) 2008-09-17
CN101262968A (en) 2008-09-10
EP1944105A1 (en) 2008-07-16
JP2007075862A (en) 2007-03-29
US20090151887A1 (en) 2009-06-18

Similar Documents

Publication Publication Date Title
US4340108A (en) Method of casting metal in sand mold using reduced pressure
KR100520561B1 (en) A cooling device for die casting metallic pattern
CN105215271B (en) The cored-up mould sand mould structure and cored-up mould method of a kind of gear box casing casting
CN101780537B (en) Method for casting low-alloy cast steel automobile axle housing through V-process technology
US3253307A (en) Method and apparatus for regulating molten metal teeming rates
JP5527451B1 (en) Casting equipment
JP2007167955A (en) Method for casting metallic material and casting apparatus therefor
KR20040030134A (en) Method and apparatus for low pressure aluminum foam casting
US7134477B2 (en) Lightweight part, as well as process and device for its production
DE60111190T2 (en) Method and device for producing cast foam bodies
FI77998C (en) Precisionsgjutfoerfarande och gjutform.
CN1960822B (en) Method and device for pouring molten metal in vacuum molding and casting
US20130025815A1 (en) Down sprue core for use in casting railcar coupler knuckles
JP2007167954A (en) Method for casting molten metallic material and casting apparatus
US20090321612A1 (en) Mold
US7543626B1 (en) Molding apparatus and method
KR100901034B1 (en) Method and device for pouring molten metal in vacuum molding and casting
EP0732980B1 (en) A casting apparatus and method
EP0061703A1 (en) Apparatus for casting low-density alloys
US4832105A (en) Investment casting method and apparatus, and cast article produced thereby
CN101618428B (en) Method for casting hub casts of aerogenerators
PT89551B (en) Molds for the foundation of metals and feeders with shirts containing filters for use with these molds
CA2403952A1 (en) Method for the uphill casting of cast pieces in sand dies with controlled solidification
US3532154A (en) Method and apparatus for casting utilizing fluid pressure differentials
CN1326646C (en) Vacuum pump impeller integral casting process

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110608

Termination date: 20170815

CF01 Termination of patent right due to non-payment of annual fee