CN103008545B - Lost foam casting method and cast product - Google Patents
Lost foam casting method and cast product Download PDFInfo
- Publication number
- CN103008545B CN103008545B CN201210532207.4A CN201210532207A CN103008545B CN 103008545 B CN103008545 B CN 103008545B CN 201210532207 A CN201210532207 A CN 201210532207A CN 103008545 B CN103008545 B CN 103008545B
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- support member
- lost
- casting method
- foam casting
- yielding position
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010114 lost-foam casting Methods 0.000 title claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 17
- 238000005266 casting Methods 0.000 claims abstract description 16
- 244000035744 Hura crepitans Species 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 241000221696 Sclerotinia sclerotiorum Species 0.000 claims description 28
- 239000003110 molding sand Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 235000002245 Penicillium camembertii Nutrition 0.000 abstract 3
- 239000006260 foam Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- GFUGBRNILVVWIE-UHFFFAOYSA-N methyl hex-3-enoate Chemical class CCCC=CC(=O)OC GFUGBRNILVVWIE-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a lost foam casting method and a cast product, and the method comprises the following steps: putting the lost foam white mold (1) into a sand box (3) after coating and drying; filling dry sand into the sand box (3) to complete the molding; vacuumizing the sand box (3) and pouring; the easy-to-deform part of the lost foam white mold (1) is provided with a supporting piece (2) used for preventing the easy-to-deform part from deforming. The support piece is utilized to support the easy-deformation part, so that the deformation of the lost foam white mold in the processes of coating, mold assembling and molding can be prevented, and a casting with a required shape can be obtained after the casting is finished.
Description
Technical field
The present invention relates to lost foam casting, particularly, the cast article relating to a kind of lost-foam casting method and use the method to cast.
Background technology
Lost foam casting is that the white mould of evaporative pattern made by the foamed material similar to casting dimension shape brushes fireproof coating and after drying, be embedded in vibration molding in dry sand, then pour into a mould under negative pressure, model is gasified, liquid metals occupies modal position, forms the novel casting method of foundry goods after solidifying cooling.Lost foam casting has the advantages such as casting accuracy is high, flexible design, cleaner production.But because the white mould of evaporative pattern is made up of foamed material, comparatively large to the sensitiveness of temperature, if the dry sand temperature that moulding uses is too high, the white mould of evaporative pattern is easily out of shape in modeling process, causes final casting to be out of shape.In addition, in process of production, due to coating, the group External Force Acting of die process and moulding time dry sand vibration and vacuumize impact, also easily make the white mould of evaporative pattern deform.Wherein, for concrete conveying elbow pipe foundry goods, in process of production, when the mouth of pipe place distortion of the white mould of evaporative pattern, cause the mouth of pipe of final casting to become oval, because casting material is comparatively hard, cannot correction be processed, larger dislocation can be produced, the serious fluency hindering concrete conveyance when causing foundry goods and associated components (such as wear-resistant sleeve) to assemble.
Summary of the invention
The object of this invention is to provide a kind of lost-foam casting method can avoided or reduce casting deformation as far as possible.
To achieve these goals, the invention provides a kind of lost-foam casting method, the method comprises: the white mould of evaporative pattern after also being dried by coating puts into sandbox; Dry sand is inserted to complete moulding in described sandbox; Described sandbox is vacuumized and pours into a mould; Wherein, the yielding position of the white mould of described evaporative pattern is provided with the support member for preventing this yielding position from deforming.
The present invention also provides a kind of cast article, and wherein, this cast article is made up of lost-foam casting method of the present invention and is had accurate shape and size.
By technique scheme, utilize the yielding position of supports support, the distortion of the white mould of evaporative pattern in process of production can be prevented, thus the foundry goods of required form can be obtained after having cast.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the schematic diagram that lost-foam casting method is described;
Fig. 2 illustrates that in lost-foam casting method of the present invention, annular core is supported on the stereogram inside evaporative pattern tunica albuginea;
Fig. 3 is the sectional view of Fig. 2.
Description of reference numerals
1: the white mould 1a of evaporative pattern: spout part 2: support member 3: sandbox
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
According to an aspect of the present invention, provide a kind of lost-foam casting method, the method comprises: the white mould 1 of evaporative pattern after also being dried by coating puts into sandbox 3; Dry sand is inserted to complete moulding in described sandbox 3; Described sandbox 3 is vacuumized and poured into a mould; Wherein, the yielding position of the white mould of described evaporative pattern 1 is provided with the support member 2 for preventing this yielding position from deforming.
According to a further aspect in the invention, provide a kind of cast article, wherein, this cast article is made up of lost-foam casting method of the present invention, thus has accurate shape and size.
Described cast article can be the various suitable kind and shape that can be made by lost foam casting, such as, described cast article can for the inner bag part in concrete conveying elbow pipe or multilayer bend pipe etc. needs to guarantee to dock with associated components and have the cast article that degree of precision requires.
By utilizing support member 2 to support yielding position, the white mould 1 of evaporative pattern in process of production can be prevented to be out of shape because being subject to external force pressure, thus the foundry goods of required form can be obtained after having cast.
Preferably, after described support member 2 is arranged on described yielding position, coating and oven dry can be carried out to the white mould 1 of described evaporative pattern together with support member 2.Thus, can the white mould 1 of evaporative pattern be prevented to be out of shape because being subject to external force pressure in whole production process (comprising coating, group mould, moulding (comprise dry sand vibration and vacuumize)).In addition, by coating and oven dry, the yielding position of support member 2 and the white mould of evaporative pattern 1 organically can be combined as a whole, serve the effect making support member 2 and evaporative pattern white mould 1 relative positioning.
In addition, when moulding by casting, the outer surface of support member 2 replaces the white mould of evaporative pattern 1 to form the profile of foundry goods at the die joint at yielding position.Therefore, preferably, described support member 2 by Making mold, thus makes support member 2 have accurate size and dimension, to form the accurate foundry goods of size and dimension.
Wherein, support member 2 can adopt various suitable material by Making mold, as long as make support member 2 can support yielding position.Such as, the intensity of support member 2 is better than the intensity of the white mould 1 of evaporative pattern.Preferably, described support member 2 is made up of molding sand or frivolous refractory brick.Especially, when the support member 2 using molding sand to make, cleaning during the demoulding, is convenient to.Wherein, more preferably, molding sand is resin sand or precoated sand, thus can burn when pouring into a mould, and during the demoulding, collapsibility is good, only needs slight vibration can remove from foundry goods.When using such as refractory brick material, also need when the demoulding to make support member 2 broken, to remove from foundry goods.
For guaranteeing the location at support member 2 and yielding position, in the preferred embodiment of the present invention, described support member 2 can be made to form interference fit with described yielding position, in another kind of preferred embodiment of the present invention, described support member 2 can be made to be fixed on described yielding position.It will be appreciated by persons skilled in the art that and various suitable mode can be adopted to realize being fixedly connected with of support member 2 and yielding position, such as, described support member 2 can be made to glued joint in described yielding position.
When casting pipe, emphasis is usually needed to guarantee the casting accuracy of opening part, to connect.Therefore, be the situation of spout part 1a for yielding position, described support member 2 can be formed as annular and support described spout part 1a, thus guarantees that spout part 1a can not be out of shape under external force by the support member 2 of annular.
Wherein, as required, the support member 2 of annular can be arranged on inner side and/or the outside of spout part 1a.Preferably, as shown in Figures 2 and 3, described support member 2 can for being supported on the annular core inside described spout part 1a, and the external diameter of described annular core mates with the internal diameter of described spout part 1a.
Below, the embodiment of casting method of the present invention is described for casting pipe.
First, use resin sand be molded the support member 2 being formed as annular core, make the external diameter of annular core can with the internal diameter interference fit of the spout part 1a of the white mould 1 of evaporative pattern.
Then, annular core is interference fitted in spout part 1a, and carries out coating and oven dry together with the white mould 1 of annular core and evaporative pattern.
Subsequently, the white mould 1 of evaporative pattern after drying is put into sandbox 3 and filling moulding, because spout part 1a place is provided with annular core, thus can not be out of shape.
Then, vacuumize sandbox 3 and pour into a mould, in casting process, the white mould 1 of evaporative pattern will gasify, and resin sand will burn.
Finally, after foundry goods cooling, mould turnover sand removal is carried out.Even if the resin sand of support member 2 does not burn completely, also can be defeated and dispersed in molding sand rapidly under the effect of vibration of mould turnover sand removal, can recycle as molding sand.
In addition, it should be noted that, the white mould of evaporative pattern 1 can adopt and well known to a person skilled in the art that various suitable material is made, and such as expandable polystyrene (or methyl-prop hexenoic acid methyl esters) foamed plastics etc., are not particularly limited at this.In addition, the technological parameter (such as vacuum, pouring temperature etc.) of lost foam casting can be selected according to the material of cast article, specification, and the present invention does not illustrate this and limits.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a lost-foam casting method, the method comprises:
The white mould of evaporative pattern (1) after also being dried by coating puts into sandbox (3);
Dry sand is inserted to complete moulding in described sandbox (3);
Described sandbox (3) is vacuumized and poured into a mould;
It is characterized in that, the yielding position of the white mould of described evaporative pattern (1) is provided with the support member (2) for preventing this yielding position from deforming,
Wherein, after described support member (2) is arranged on described yielding position, together coating and oven dry are carried out to the white mould of described evaporative pattern (1) and support member (2), to make described support member (2) and the white mould of described evaporative pattern (1) relative positioning; When moulding by casting, the outer surface of described support member (2) replaces the die joint of the white mould of described evaporative pattern (1) at described yielding position to form the profile of foundry goods.
2. lost-foam casting method according to claim 1, wherein, described support member (2) is by Making mold.
3. lost-foam casting method according to claim 2, wherein, described support member (2) is made up of molding sand or frivolous refractory brick.
4. lost-foam casting method according to claim 3, wherein, described support member (2) is made up of resin sand or precoated sand.
5. lost-foam casting method according to claim 1, wherein, described support member (2) and described yielding position form interference fit.
6. lost-foam casting method according to claim 1, wherein, described support member (2) is fixed on described yielding position.
7. lost-foam casting method according to claim 6, wherein, described support member (2) glueds joint in described yielding position.
8. according to the lost-foam casting method in claim 1-7 described in any one, wherein, described yielding position comprises spout part (1a), and described support member (2) is formed as annular and supports described spout part (1a).
9. lost-foam casting method according to claim 8, wherein, described support member (2) is for being supported on the annular core of described spout part (1a) inner side, and the external diameter of described annular core mates with the internal diameter of described spout part (1a).
10. a cast article, is characterized in that, this cast article is made by according to the lost-foam casting method in claim 1-9 described in any one.
11. cast articles according to claim 10, wherein, described cast article is the inner bag part in concrete conveying elbow pipe or multilayer bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210532207.4A CN103008545B (en) | 2012-12-11 | 2012-12-11 | Lost foam casting method and cast product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210532207.4A CN103008545B (en) | 2012-12-11 | 2012-12-11 | Lost foam casting method and cast product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103008545A CN103008545A (en) | 2013-04-03 |
| CN103008545B true CN103008545B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210532207.4A Active CN103008545B (en) | 2012-12-11 | 2012-12-11 | Lost foam casting method and cast product |
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| Country | Link |
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| CN (1) | CN103008545B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736910A (en) * | 2013-12-26 | 2014-04-23 | 柳州正菱集团有限公司 | Casting method |
| CN106378419A (en) * | 2016-11-29 | 2017-02-08 | 芜湖新兴铸管有限责任公司 | Deformation-preventing device for evanescent mode ductile iron pipe fitting bell mouth |
| CN106378418A (en) * | 2016-11-29 | 2017-02-08 | 芜湖新兴铸管有限责任公司 | Deformation-preventing device for evanescent mode ductile iron pipe fitting bell mouth |
| CN107282880A (en) * | 2017-08-22 | 2017-10-24 | 金华万里扬机械制造有限公司 | Cast model |
| CN107876695A (en) * | 2017-12-15 | 2018-04-06 | 芜湖新兴新材料产业园有限公司 | Prevent process structure of lost foam pattern deformation and preparation method thereof |
| CN109317617A (en) * | 2018-11-29 | 2019-02-12 | 芜湖新兴新材料产业园有限公司 | Sand circle and preparation method thereof suitable for lost foam casting process |
| CN109226698A (en) * | 2018-11-29 | 2019-01-18 | 芜湖新兴新材料产业园有限公司 | The anti-deformation device and large-caliber pipe fittings casting technique that dip-coating process uses |
| CN109317618B (en) * | 2018-11-29 | 2023-12-26 | 芜湖新兴新材料产业园有限公司 | Pipe fitting anti-deformation tool suitable for lost foam casting process and pipe fitting casting process |
| CN109351917A (en) * | 2018-11-29 | 2019-02-19 | 芜湖新兴新材料产业园有限公司 | The casting technique of motor housing |
| CN113458332A (en) * | 2021-05-28 | 2021-10-01 | 共享铸钢有限公司 | Mold for sand casting and manufacturing method thereof |
| CN114311277A (en) * | 2021-12-30 | 2022-04-12 | 江苏徐工工程机械研究院有限公司 | Manufacturing method of concrete conveying pipe, concrete conveying pipe and concrete pump truck |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118154A (en) * | 1990-09-06 | 1992-04-20 | Okamoto:Kk | Manufacture of manhole with lost foam casting method |
| CN101011723A (en) * | 2007-01-09 | 2007-08-08 | 沪东重机股份有限公司 | Method of casting thin wall water chamber for high power diesel engine |
| CN201669375U (en) * | 2010-05-25 | 2010-12-15 | 湖南省津市市嘉诚汽车部件制造有限公司 | Lost mould for casting flywheel casing of engine |
| CN102009130A (en) * | 2010-11-10 | 2011-04-13 | 淅川金戈利冶金铸造有限公司 | Lost foam casting model anti-deformation technical clamp and using method |
| CN102228955A (en) * | 2011-07-01 | 2011-11-02 | 李复旺 | Treatment method for deformation of massive lost foam |
-
2012
- 2012-12-11 CN CN201210532207.4A patent/CN103008545B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118154A (en) * | 1990-09-06 | 1992-04-20 | Okamoto:Kk | Manufacture of manhole with lost foam casting method |
| CN101011723A (en) * | 2007-01-09 | 2007-08-08 | 沪东重机股份有限公司 | Method of casting thin wall water chamber for high power diesel engine |
| CN201669375U (en) * | 2010-05-25 | 2010-12-15 | 湖南省津市市嘉诚汽车部件制造有限公司 | Lost mould for casting flywheel casing of engine |
| CN102009130A (en) * | 2010-11-10 | 2011-04-13 | 淅川金戈利冶金铸造有限公司 | Lost foam casting model anti-deformation technical clamp and using method |
| CN102228955A (en) * | 2011-07-01 | 2011-11-02 | 李复旺 | Treatment method for deformation of massive lost foam |
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| Publication number | Publication date |
|---|---|
| CN103008545A (en) | 2013-04-03 |
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