CN102941334B - Casting pressurizing system and casting pressurizing method - Google Patents
Casting pressurizing system and casting pressurizing method Download PDFInfo
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- CN102941334B CN102941334B CN201210490373.2A CN201210490373A CN102941334B CN 102941334 B CN102941334 B CN 102941334B CN 201210490373 A CN201210490373 A CN 201210490373A CN 102941334 B CN102941334 B CN 102941334B
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Abstract
The invention discloses a casting pressurizing system which is used for pressing molten metal in a pouring system comprising a pouring cup and a casting pressurizing device after the molten metal is poured. The casting pressurizing device comprises a pressurizing cover and a pressure pipeline, one end of the pressurizing cover is provided with a sealing connection portion connected with the pouring cup of the pouring system, and the pressure pipeline is connected with a compressed air source and hermetically communicated with the other end of the pressurizing cover. Compared with traditional gravity sand mold or metal mold casting, the casting pressurizing device has the advantages that the molten metal in a casting mold can be pressed, each portion of the molten metal in the casting mold has positive pressure, the molten metal is solidified under the pressure, the mold-filling capacity of the molten metal and compactness of a casting are improved, the defects such as short run, cold shut, shrinkage porosity and shrinkage cavity of the casting are decreased, and the yield of the casting is improved. The invention further discloses a casting pressurizing method adopting the casting pressurizing system.
Description
Technical field
The present invention relates to Casting Equipment technical field, more particularly, relate to a kind of casting compression system and casting pressure method.
Background technology
Casting filling refers to that in casting process, molten alloy liquid is by the process of certain flow channel to filling in casting mold cavity.Thin-section casting, in casting process, also exists the situation that aluminium alloy fills type difficulty usually, causes final foundry goods to occur the defect such as misrun, cold shut, foundry goods is scrapped.The alloy of and mushy freezing large for shrinkage tendency, often also exists again the situation of feeding difficulty, causes foundry goods to occur the defects such as shrinkage cavity and porosity in casting process.
Above-mentioned two situations greatly reduce the yield rate of foundry goods.For light-alloy, current known high pressure, low pressure, counter-pressure casting can make aluminium alloy fill type under stress and solidify, solving the problem to a great extent.For dystectic alloy such as cast iron, cast steel, high pressure and low pressure casting cannot be adopted, the casting (traditional directly cast casting) under major part or gravity, shaping under pressure cannot be realized and solidify.
For the problems referred to above, the patent No. is that the Chinese invention patent of ZL 200620104334.4 discloses a kind of pressuring casting box, as shown in Figure 1, its wire netting 2 is placed in casing 1 inner chamber bottom, casing 1 sidewall is also provided with exhaust outlet 3 and is communicated with cavity below wire netting 2, on casing 1, also sand box cover 4 is stamped in sealing, and this sand box cover 4 is provided with air inlet 5 and forms adding pressure type structure.Sand box cover 4 is also provided with Pressure gauge 6, controls more convenient.
During casting, casting mold 7 is put into the sand of casing 1, close exhaust outlet 3, casting of molten metal, then fast sealing covers sand box cover 4., open air inlet 5, pass into pressed gas, when pressurize is to close solidifying, open exhaust outlet 3, hot gas is discharged through wire netting 2 and exhaust outlet 3, simultaneously keep pressure to casting mold 7 is quick and complete solidify after, step-down unpack.
This patent can realize to a certain extent to molten metal pressurization, but this pressure method makes casting mold upper surface be exposed to equally in the middle of pressure, and this pressure is contrary with filling type direction, plays counter-pressure effect, and what be unfavorable for this place's aluminium alloy fills type.In addition, because the method adopts special sandbox, need the sand mold having made type in advance to put into this special shape mo(u)lding box, then need a large amount of special shape mo(u)lding boxs for batch production, not only cost is higher, and operation is also comparatively complicated.
Therefore, how to avoid, because casting mold upper surface is exposed in the middle of pressure equally, being unfavorable for the drawback of filling type of this place's molten metal, becoming the technical problem that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of casting compression system, to avoid, because casting mold upper surface is exposed in the middle of pressure equally, being unfavorable for the drawback of filling type of this place's aluminium alloy;
Another object of the present invention is to provide a kind of casting compression system with above-mentioned casting pressue device;
Another object of the present invention is to provide a kind of casting pressure method adopting above-mentioned casting pressue device.
For achieving the above object, the invention provides following technical scheme:
A kind of casting pressue device, for after pouring metal melt terminates, running gate system inner metal liquid is exerted pressure, comprising:
Pressure cowling, one end has the portion that is tightly connected for being connected with the cup of described running gate system;
For the pressure pipeline be connected with compressed gas source, described pressure pipeline seals with the other end of described pressure cowling and is communicated with.
Preferably, in above-mentioned casting pressue device, described pressure cowling passes through the Flange joint of its flange and described pressure pipeline.
Preferably, in above-mentioned casting pressue device, between the flange of described pressure cowling and the flange of described pressure pipeline, be provided with the first fire resistant seal circle.
Preferably, in above-mentioned casting pressue device, described in the place of portion that is tightly connected be provided with the second fire resistant seal circle.
Preferably, in above-mentioned casting pressue device, described first fire resistant seal circle and described second fire resistant seal circle are rock wool, alumina silicate fibre, zirconium silicate fibre or carbon fiber, and thickness is 5-50mm.
Preferably, in above-mentioned casting pressue device, described pressure pipeline is provided with pressure regulator valve.
A kind of casting compression system, comprising:
Cup, described cup is connected with the casting mold in sandbox by running channel;
As above the casting pressue device described in any one, described pressure cowling is tightly connected by its be tightly connected portion and described cup.
Preferably, in above-mentioned casting compression system, described pressure cowling and described cup are cone barrel structure, and the big opening end of described pressure cowling is connected with the big opening end of described cup;
Also comprise the enclasp device held tightly in described pressure cowling and described cup junction.
Preferably, in above-mentioned casting compression system, described enclasp device comprises the first identical half hoop of structure and the second half hoop, and one end of described first half hoop and the second half hoop is hinged;
Described first half hoop and the upper ring surface of the second half hoop are surrounded by the gradient identical with the outer surface of described pressure cowling and the bellmouth of incline direction;
Described first half hoop is surrounded by the gradient identical with the outer surface of described cup and the bellmouth of incline direction with the lower anchor ring of the second half hoop.
A kind of casting pressure method, after pouring metal melt terminates, comprises the following steps:
The pressure cowling of the casting pressue device as above described in any one be connected with compressed air is enclosed within cup, and adopt enclasp device by pressure cowling and cup compact siro spinning technology, then the pressure regulator valve on opening pressure pipeline, and regulate pressure to 0.05-5MPa, now compressed air is exerted pressure to molten metal.
As can be seen from above-mentioned technical scheme, casting pressue device provided by the invention, after pouring metal melt terminates, is enclosed within the pressure cowling be connected with compressed air on cup immediately, and makes the portion that is tightly connected and the cup compact siro spinning technology of pressure cowling.The present invention, compared with prior art pressuring method, by exert pressure on cup inner metal liquid, and is applied pressure on casting mold inner metal liquid by the running channel inner metal liquid be connected with cup.Casting pressue device of the present invention is adopted to exert pressure to molten metal, with prior art compared with exerting pressure in sandbox, avoid because casting mold upper surface is exposed in the middle of pressure, be unfavorable for the drawback of filling type of this place's aluminium alloy, pressure can be applied to casting mold inner metal liquid, make molten metal in casting mold each position all in malleation, molten metal is solidified under stress, not only increase the mold-filling capacity of molten metal, and improve the compactness of foundry goods, decrease the defects such as the misrun of foundry goods, cold shut, shrinkage porosite, shrinkage cavity, improve casting yield.
In addition, in another technical scheme of the present invention, pressure cowling and cup are cone barrel structure, and the big opening end of pressure cowling is connected with the big opening end of cup; Enclasp device holds the junction in pressure cowling and cup tightly.Enclasp device comprises the first identical half hoop of structure and the second half hoop, and one end of the first half hoop and the second half hoop is hinged; First half hoop and the upper ring surface of the second half hoop are surrounded by the gradient identical with the outer surface of pressure cowling and the bellmouth of incline direction; First half hoop is surrounded by the gradient identical with the outer surface of cup and the bellmouth of incline direction with the lower anchor ring of the second half hoop.The present invention, by adopting the enclasp device of unique texture, by the cone barrel structure of pressure cowling and cup, makes to hold tightly after on pressure cowling and cup at enclasp device, just makes pressure cowling and cup to throw off.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of pressuring casting box of the prior art;
Structural representation in the pressue device use procedure that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the pressure cowling that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the tubular enclasp device that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the half sectional view of Fig. 4 along A-A line;
Fig. 6 is the structural representation of casting process.
Detailed description of the invention
Core of the present invention is to provide a kind of casting pressue device, to apply pressure to casting mold inner metal liquid after cast, improves the cavity filling of molten metal in casting mold and feeding, improves the density of foundry goods;
Another core of the present invention is to provide a kind of casting compression system with above-mentioned casting pressue device;
A core more of the present invention is to provide a kind of casting pressure method adopting above-mentioned casting pressue device.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 2-Fig. 6, the structural representation in the pressue device use procedure that Fig. 2 provides for the embodiment of the present invention; The structural representation of the pressure cowling that Fig. 3 provides for the embodiment of the present invention; The structural representation of the tubular enclasp device that Fig. 4 provides for the embodiment of the present invention; Fig. 5 is the half sectional view of Fig. 4 along A-A line; Fig. 6 is the structural representation of casting process.
The casting pressue device 2 that the embodiment of the present invention provides, for after pouring metal melt terminates, exerts pressure to running gate system inner metal liquid, comprises pressure cowling 26 and pressure pipeline 21.
Wherein, pressure cowling 26 one end has the portion that is tightly connected 24 for being connected with the cup 4 of running gate system, after sealing connecting portion is connected with the openend of cup 4, can keep sealing.The mode that can realize in prior art sealing has a lot, such as, add the measure such as sealing ring, sealing cotton, do not limit herein, as long as can realize sealing.The material of pressure cowling 26 can be pottery, graphite, metal etc.
Pressure pipeline 21 is connected with compressed gas source (not shown) in use, for the Compressed Gas in compressed gas source is imported pressure cowling 26, pressure pipeline 21 seals with the other end of pressure cowling 26 and is communicated with, and pressure channel 21 is for being communicated with pressure cowling 26 and compressed gas source.And pressure cowling 26 is for being connected with cup 4, the effect of exerting pressure to molten metal after cast therefore can be realized.
Casting pressue device 2 provided by the invention, after pouring metal melt terminates, is enclosed within the pressure cowling 26 be connected with compressed air on cup 4 immediately, and makes the portion that is tightly connected 24 and cup 4 compact siro spinning technology of pressure cowling 26.
The present invention is compared with prior art pressuring method, by exert pressure on cup 4 inner metal liquid instead of add and be pressed in sandbox, and apply pressure to casting mold inner metal liquid by the running channel inner metal liquid be connected with cup 4, therefore also just avoiding casting mold upper surface is exposed in the middle of pressure, casting mold upper surface place pressure is contrary with filling type direction, plays the drawback of counter-pressure effect.
Casting pressue device of the present invention 2 pairs of molten metals are adopted to exert pressure, with prior art compared with exerting pressure in sandbox, avoid because casting mold upper surface is exposed in the middle of pressure, be unfavorable for the drawback of filling type of this place's aluminium alloy, casting mold inner metal liquid pressure can be increased, make molten metal in casting mold each position all in malleation, molten metal is solidified under stress, not only increase the mold-filling capacity of molten metal, and improve the compactness of foundry goods, decrease the defects such as the misrun of foundry goods, cold shut, shrinkage porosite, shrinkage cavity, improve casting yield.
In addition, must adopt the special shape mo(u)lding box of special construction in prior art, need the sand mold having made type in advance to put into this special shape mo(u)lding box, then need a large amount of special shape mo(u)lding boxs for batch production, not only cost is higher, and operation is also comparatively complicated.
There are not the problems referred to above in casting pressue device provided by the invention 2, because its pressuring method is different from prior art pressuring method, this casting pressue device 2 is without the need to being connected with sandbox, only need and cup 4, therefore to the structure no requirement (NR) of sandbox, not only cost is lower, and operation is also comparatively simple.
Further, pressure cowling 26 by the Flange joint of its flange 23 with pressure pipeline 21, and is fixed by bolt.Adopt the mode of Flange joint, more often use in pipeline connects, it has easy accessibility, the feature that stability is high.
In the present invention one specific embodiment, be provided with the first fire resistant seal circle 22 between the flange 23 of pressure cowling 26 and the flange of pressure pipeline 21, namely pressure cowling 26 is sealed by the first fire resistant seal circle 22 with the junction of pressure pipeline 21.
Correspondingly, the place of portion 24 that is tightly connected is provided with the second fire resistant seal circle 25, and the junction namely between pressure cowling 26 and cup 4 is sealed by the second fire resistant seal circle 25.The sealing ring that namely fire resistant seal circle is obtained by refractory material.Its material can be various refractory fibre, and as alumina silicate fibre, zirconium silicate fibre, carbon fiber etc., the thickness of the first fire resistant seal circle 22 and the second fire resistant seal circle 25 is preferably 5-50mm.
In order to optimize technique scheme further, in the embodiment of the present invention, pressure pipeline 21 is also provided with the pressure regulator valve 27 for regulating compression pressure.Behind the portion that is tightly connected 24 of pressure cowling 26 with cup 4 compact siro spinning technology, open pressure regulator valve 27 and regulate pressure to exert pressure to molten metal to 0.05-5Mpa.
The embodiment of the present invention additionally provides a kind of casting compression system, comprises cup 4 and as above casts pressue device 2 disclosed in embodiment.Cup 4 is connected with the casting mold in sandbox 6 by running channel 5, and the pressure cowling 26 of casting pressue device 2 is tightly connected with cup 4 by its portion 24 that is tightly connected.Cup 4 is molding gate cup, and as ceramic pouring cup, metal mold cup etc., profile is truncated cone, and its upper shed diameter is greater than under shed diameter.
The casting compression system that the embodiment of the present invention provides, owing to have employed above-mentioned casting pressue device, therefore has all technique effects of above-mentioned casting pressue device concurrently, repeats no more herein.
In the present invention one specific embodiment, pressure cowling 26 and cup 4 are cone barrel structure, and the big opening end of pressure cowling 26 is connected with the big opening end of cup 4; The present invention also can comprise the enclasp device 3 held tightly in pressure cowling 26 and cup 4 junction.The present invention is tightr by what arrange that enclasp device 3 can make pressure cowling 26 be connected with cup 4.
Further, enclasp device 3 one end of comprising the first identical half hoop 31 of structure and the second half hoop 32, first half hoop 31 and the second half hoop 32 is hinged by bearing pin 33; First half hoop 31 and the second half hoop 32 all have upper ring surface and lower anchor ring, and upper ring surface is used for being connected with pressure cowling 26, and lower anchor ring is used for being connected with cup 4.Upper ring surface is surrounded by the gradient identical with the outer surface of pressure cowling 26 and the bellmouth of incline direction; First half hoop 31 is surrounded by the gradient identical with the outer surface of cup 4 and the bellmouth of incline direction with the lower anchor ring of the second half hoop 32.The minor diameter of internal diameter size between pressure cowling 26 of upper ring surface and the size of larger diameter end, the minor diameter of internal diameter size between cup 4 of lower anchor ring and the size of larger diameter end.
The present invention is by adopting the enclasp device of unique texture, and by the cone barrel structure of pressure cowling 26 and cup 4, make to hold tightly after on pressure cowling 26 and cup 4 at enclasp device 3, pressure cowling 26 and cup 4 just can not be thrown off.Because pressure cowling 26 and cup 4 are to throw off, need to occur to offset in the opposite direction, due to enclasp device 3 respectively with pressure cowling 26 and cup 4 cone match, what can stop the two departs from movement, and therefore pressure cowling 26 and cup 4 can not be thrown off.
The embodiment of the invention also discloses a kind of casting pressure method, after pouring metal melt terminates, comprise the following steps:
The pressure cowling 26 as above casting pressue device 2 disclosed in embodiment be connected with compressed air is enclosed within cup 4, and adopt enclasp device 3 by pressure cowling 26 and cup 4 compact siro spinning technology, then the pressure regulator valve 27 on opening pressure pipeline 21, and regulate pressure to 0.05-5MPa, now compressed air is exerted pressure to molten metal.
The present invention is compared with prior art pressure method, by exert pressure on cup 4 instead of add and be pressed in sandbox, and apply pressure to casting mold by the running channel be connected with cup 4, therefore also just avoiding casting mold upper surface is exposed in the middle of pressure, pressure is contrary with filling type direction, plays the drawback of counter-pressure effect.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. cast a compression system, it is characterized in that, comprise cup (4) and casting pressue device (2);
Described cup (4) is connected with the casting mold in sandbox (6) by running channel (5);
Described casting pressue device (2) comprising:
Pressure cowling (26), one end has the portion that is tightly connected (24) for being connected with the cup (4) of described running gate system, and described pressure cowling (26) is tightly connected with described cup (4) by its portion that is tightly connected (24); Described pressure cowling (26) and described cup (4) are cone barrel structure, and the big opening end of described pressure cowling (26) is connected with the big opening end of described cup (4);
For the pressure pipeline (21) be connected with compressed gas source, described pressure pipeline (21) seals with the other end of described pressure cowling (26) and is communicated with;
Also comprise the enclasp device (3) held tightly in described pressure cowling (26) and described cup (4) junction.
2. cast compression system as claimed in claim 1, it is characterized in that, described pressure cowling (26) is by the Flange joint of its flange (23) with described pressure pipeline (21).
3. cast compression system as claimed in claim 2, it is characterized in that, between the flange (23) of described pressure cowling (26) and the flange of described pressure pipeline (21), be provided with the first fire resistant seal circle (22).
4. cast compression system as claimed in claim 3, it is characterized in that, described in portion (24) place that is tightly connected be provided with the second fire resistant seal circle (25).
5. cast compression system as claimed in claim 4, it is characterized in that, described first fire resistant seal circle (22) and described second fire resistant seal circle (25) are rock wool, alumina silicate fibre, zirconium silicate fibre or carbon fiber, and thickness is 5-50mm.
6. the casting compression system as described in any one of claim 1-5, is characterized in that, described pressure pipeline (21) is provided with pressure regulator valve (27).
7. cast compression system as claimed in claim 1, it is characterized in that, described enclasp device (3) comprises identical the first half hoop (31) of structure and the second half hoop (32), and one end of described first half hoop (31) and the second half hoop (32) is hinged;
Described first half hoop (31) and the upper ring surface of the second half hoop (32) are surrounded by the gradient identical with the outer surface of described pressure cowling (26) and the bellmouth of incline direction;
Described first half hoop (31) and the lower anchor ring of the second half hoop (32) are surrounded by the gradient identical with the outer surface of described cup (4) and the bellmouth of incline direction.
8. cast a pressure method, it is characterized in that, after pouring metal melt terminates, comprise the following steps:
The pressure cowling (26) of the casting compression system as described in any one of claim 1-7 be connected with compressed air is enclosed within cup (4), and adopt enclasp device (3) by pressure cowling (26) and cup (4) compact siro spinning technology, then the pressure regulator valve (27) on opening pressure pipeline (21), and regulate pressure to 0.05-5MPa, now compressed air is exerted pressure to molten metal.
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| CN201210490373.2A CN102941334B (en) | 2012-11-27 | 2012-11-27 | Casting pressurizing system and casting pressurizing method |
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| CN103350215B (en) * | 2013-06-20 | 2015-12-23 | 东营嘉扬精密金属有限公司 | A kind of production technology solving Birmasil pin hole problems |
| CN103317117B (en) * | 2013-06-27 | 2015-06-03 | 华南理工大学 | Wedge-block connector for melt transfer system of squeeze casting equipment |
| CN103317118B (en) * | 2013-06-27 | 2015-06-03 | 华南理工大学 | Clamping-block fast connector for melt transfer system of squeeze casting equipment |
| CN106238674B (en) * | 2016-08-05 | 2018-02-09 | 溧阳市新力机械铸造有限公司 | A kind of preparation method of Ti alloy casting overlay film zircon sand sand mold |
| CN114346178A (en) * | 2021-12-20 | 2022-04-15 | 苏州明志科技股份有限公司 | Casting process and casting system |
| CN115673297B (en) * | 2022-12-29 | 2023-04-14 | 泊头市青峰机械有限公司 | Pressurizing and solidifying device and method for casting preparation |
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| JPS6152978A (en) * | 1984-08-22 | 1986-03-15 | Daido Steel Co Ltd | Casting method |
| JPS6434572A (en) * | 1987-07-30 | 1989-02-06 | Mazda Motor | Full mold casting device |
| JPH03230860A (en) * | 1990-02-06 | 1991-10-14 | Mazda Motor Corp | Pressurized casting method |
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| US5297610A (en) * | 1989-05-16 | 1994-03-29 | Mazda Motor Corporation | Pressure casting method and apparatus |
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