CN104117632B - A kind of casting technique preventing structure hole position scab in cavityless casting - Google Patents
A kind of casting technique preventing structure hole position scab in cavityless casting Download PDFInfo
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- CN104117632B CN104117632B CN201410319322.2A CN201410319322A CN104117632B CN 104117632 B CN104117632 B CN 104117632B CN 201410319322 A CN201410319322 A CN 201410319322A CN 104117632 B CN104117632 B CN 104117632B
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- gasified pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to casting technology field, particularly a kind of casting technique preventing structure hole position scab in cavityless casting, comprise following technological process successively: a) make and the gasified pattern that bonds; B) fireproof coating is brushed on gasified pattern surface; C) gasified pattern is dried; D) at the structure deep/of gasified pattern or the Quench ironware of the setting of structure dell internal fixtion and deep hole or dell matching size; E) gasified pattern is placed on back-up sand jolt ramming in molding box; F) pour into a mould; E) foundry goods is cleared up.In cavityless casting technique of the present invention, for back-up sand difficulty in gasified pattern deep hole or dell tightly and easily there is not the defect of pouring into a mould rear inner surface scab or burning into sand in large or back-up sand, in the deep hole or dell of gasified pattern, adopt Quench ironware to fill, the defect of the scab of foundry goods inner hole wall or burning into sand can be prevented.
Description
Technical field
The present invention relates to cavityless casting technical field, when particularly adopting cavityless casting cast to contain the foundry goods of the tubule part of big L/D ratio or dark shrinkage pool (or dark pit), prevent the casting technique of structure hole or dark pit position scab.
Background technology
Cavityless casting (also known as lost pattern casting) paraffin similar to casting dimension shape or bubbles model is bondd to be combined into model cluster, after brushing fireproof coating is also dried, be embedded in moulding in air-set mold sand, high temperature is poured into a mould, full mold mould is gasified, liquid metals occupies modal position, forms the novel casting method of foundry goods after solidifying cooling.In cavityless casting technology application process, the foundry goods cast out can produce various defect, wherein scab is the common defect of cavityless casting foundry goods, the main cause that cavityless casting foundry goods scab defect produces is that paint coatings comes off or ftractures, molten metal is taken advantage of this and is infiltrated in molding sand, easily forms penetration; If coating quality poor-performing, after molten metal enters die cavity, coating is through high-temperature baking, produces Chemical Felter, causes foundry goods chemical scab.Particularly when slender rectangular tube endoporus or complicated deep hole or pit back-up sand, easily cause back-up sand not consolidation or cannot back-up sand, when foundry goods surrounding is full of molten iron, molding sand constantly washes away through high temperature liquid iron, baking, there is Sand Penetration defect in final casting endoporus or shrinkage pool position, and the bore cleaning difficulty of the slender rectangular tube of big L/D ratio, dark blind hole or baroque dark pit foundry goods is also very large.
In cavityless casting, elongated hole refers to the length in hole or the degree of depth is greater than 200mm, and Kong Changyu internal diameter size is than the elongated hole being greater than 5; Dark shrinkage pool or dark pit refer to the blind hole from cast(ing) surface to cast-internal or irregularly shaped inner chamber that extend along.
Summary of the invention
The present invention is directed to the defect of slender rectangular tube endoporus or the easy scab of large and complex structure foundry goods endoporus parts containing dark shrinkage pool (or dark pit) in existing cavityless casting technique, a kind of casting technique preventing structure hole position scab in cavityless casting is provided, to improve the casting quality of cavityless casting part, and simplify the cleaning technology after cast.
The object of the present invention is achieved like this, and a kind of casting technique preventing structure hole position scab in cavityless casting, comprises following technological process successively: a) make and the gasified pattern that bonds; B) fireproof coating is brushed on gasified pattern surface; C) gasified pattern is dried; D) at the structure deep/of gasified pattern or the Quench ironware of the setting of structure dell internal fixtion and deep hole or dell matching size; E) gasified pattern is placed on back-up sand jolt ramming in molding box; F) pour into a mould; G) foundry goods is cleared up.
In cavityless casting technique of the present invention, for back-up sand difficulty in gasified pattern deep hole or dell tightly and easily there is not the defect of pouring into a mould rear inner surface scab or burning into sand in large or back-up sand, in the deep hole or dell of gasified pattern, adopt Quench ironware to fill, the defect of the scab of foundry goods inner hole wall or burning into sand can be prevented.
As a preferred embodiment of the present invention, in above-mentioned cavityless casting technique of the present invention, when described structure deep is the elongated hole of slender rectangular tube, in step d), described Quench ironware for gasified pattern structure deep inwall matched in clearance and thermal coefficient of expansion be greater than foundry goods the steel pipe of thermal coefficient of expansion cylinder iron, length 20-the 30mm larger than slim-lined construction hole length of described steel pipe, during installation, gasified pattern along the upper and lower fixed placement of hole length direction in molding box, described steel pipe lower end is concordant with gasified pattern endoporus bottom, it is outer and sealed by mud bar with the endoporus end margin of gasified pattern that structure hole is stretched out in upper end.This programme is in the cavityless casting technique of slender rectangular tube, the steel pipe adopting thermal coefficient of expansion to be greater than cast iron in the slim-lined construction hole of gasified pattern is filled, solve the problem of the elongated hole back-up sand difficulty of gasified pattern, thus avoid because of back-up sand not consolidation and the casting flaw caused, and the thermal coefficient of expansion because of steel pipe is greater than the thermal coefficient of expansion of cast iron, after foundry goods cooling, certain gap is formed between steel pipe and foundry goods, steel pipe can be taken out very easily, eliminate the sand removal process in elongated hole, reduce sand removal difficulty, and avoid the casting flaw such as scab or burning into sand in elongated hole, improve qualification rate and the casting quality of slender rectangular tube cavityless casting technique.
For improving the quality of the cavityless casting part of slender rectangular tube further, the wall thickness of described steel pipe and the ratio of elongated tubular casting thickness are 1:4-5, according to produced on-site repeatedly comparing result and the display of employing Magma analog result, under this thickness proportion condition, molten iron can not cause cast(ing) surface to go out the defect such as cold shut or carbon slag because of excessive Quench.
Further preferred as thickness of steel pipe in slender rectangular tube cavityless casting technique of the present invention, the wall thickness of described steel pipe and the ratio of elongated tubular casting thickness are 1:4.67.
As another kind of preferred version of the present invention, when described structure deep is dark blind hole in large-sized structural parts, in step d), described Quench ironware is the screw thread rod iron with dark blind hole matching form, described screw thread rod iron length 20-25mm larger than dark blind hole hole depth, is provided with the gap of 10-15mm, during installation between described screw thread rod iron and dark blind hole, screw thread rod iron is installed in dark blind hole by locating ring with one heart, and outer end is stretched out outside dark blind hole.The present invention is in cavityless casting process, the screw thread rod iron adopted is as the Quench part in dark blind hole, in cast, when molten iron flow to hole inwall surrounding, because Quench ironware thermal conductivity factor is apparently higher than the thermal conductivity factor of molding sand, thus accelerate the cooling rate of high temperature liquid iron near it, and reduce the baking of high temperature liquid iron to neighbouring coating and molding sand, and then eliminate the scab phenomenon at the dark blind hole position of foundry goods, to improve quality and the qualification rate of foundry goods.In addition, in this structure, between screw-thread steel and dark blind hole, fit clearance is rationally arranged between 10-15mm, and this gap is excessive, and cooling-down effect is not obvious, and gap is too small, Quench crossed by molten iron, causes molten iron to be lowered the temperature too fast, makes foundry goods occur cold shut, or evaporative pattern is low because of molten metal temperature, gasifies and not exclusively produce carbon slag defect.
As another kind of preferred version of the present invention, when described structure dell is dark pit in large-sized structural parts, in step d), described Quench ironware is the Sand sticking-resistant chill part matched with dark pit shape, described Sand sticking-resistant chill part length 20-25mm larger than dark pit depth, described each of Sand sticking-resistant chill part is 10-15mm with the spacing of each respective face of dark pit, during installation, Sand sticking-resistant chill part is fixedly mounted in dark pit by keeper, and outer end is stretched out outside dark pit.In cavityless casting technique of the present invention, similar as the effect of the Quench ironware in dark blind hole to the screw thread rod iron adopted, for the dark pit in picture heavy duty machine tools class formation part or dark pit in irregular shape, a Sand sticking-resistant chill part matched with dark pit shape is placed in advance at the gasified pattern parts of this dark pit, in cast, when molten iron flow to dark pit inwall surrounding, because Sand sticking-resistant chill part thermal conductivity factor is apparently higher than the thermal conductivity factor of molding sand, thus accelerate the cooling rate of high temperature liquid iron near it, and reduce the baking of high temperature liquid iron to neighbouring coating and molding sand, and then eliminate the scab phenomenon at the dark pit position of foundry goods, to improve quality and the qualification rate of foundry goods.And the gap rationally arranging each wall of Sand sticking-resistant chill part wall corresponding to dark pit can the cooling rate of conservative control molten iron near dark pit, prevent molten iron from lowering the temperature too fast or crossing the slow and defect such as the foundry goods cold shut that causes or scab.
Accompanying drawing explanation
Fig. 1 is gasified pattern structural representation during employing cavityless casting cast elongated tubular foundry goods of the present invention.
Fig. 2 is the partial schematic diagram of gasification Molded Depth pit when adopting cavityless casting cast large-sized structural parts of the present invention.
Wherein, the gasified pattern of 1 ingot mould note pipe; 2 steel pipes; 3 structural member gasified patterns; 4 Sand sticking-resistant chill parts; 5 keepers.
Detailed description of the invention
Embodiment 1
A kind of casting technique preventing structure hole position scab in cavityless casting, the present embodiment as shown in Figure 1, the ingot mould feed trumpet that foundry goods is, having an internal diameter is 202mm, and wall thickness is 71mm, the elongated tubular assembling structure of Kong Changwei 1730mm, and this endoporus is important machined surface, and surface quality requirements is very high, can not have the defects such as minor surface scab or burning into sand, after adopting cavityless casting method of the prior art to pour into a mould, endoporus sand removal is very difficult, and is difficult to ensure bore area quality requirement.Cavityless casting method of the present invention is adopted to comprise following technological process successively: a) to make and the gasified pattern 1 of the ingot mould note pipe that bonds, b) fireproof coating is brushed on gasified pattern 1 surface of ingot mould note pipe, c) gasified pattern is dried, d) in the elongated hole of gasified pattern, placing an external diameter is 202 mm, long is 1750mm, wall thickness is the steel pipe 2 of 15mm, and overlap smoothly for convenience of steel pipe 2 in the elongated hole loading gasified pattern, steel pipe 2 outer wall and gasified pattern endoporus are matched in clearance, and the thermal coefficient of expansion of tube material is greater than the hot expansion system of foundry goods, during installation, gasified pattern along the upper and lower fixed placement of hole length direction in molding box, steel pipe 2 lower end is concordant with gasified pattern endoporus bottom, the outer 20mm of gasification nib is stretched out in upper end, and the endoporus end margin of gasified pattern is sealed by mud bar along in the gap of nose end edge access aperture and steel pipe for preventing molding sand, e) above-mentioned gasified pattern above-below direction is fixed on back-up sand jolt ramming in molding box, f) pour into a mould, e) clear up foundry goods after foundry goods cooling, extracted out in foundry goods by steel pipe, the hot expansion system because of steel pipe is greater than the hot expansion system of foundry goods, so after foundry goods cooling, there is certain gap, can take out steel pipe very easily in hole between steel pipe and foundry goods endoporus.Therefore, the foundry goods containing elongated hole of method casting of the present invention, after casting, steel pipe is convenient to remove, do not need endoporus sand removal, simplify the difficulty of cleaning work, and foundry goods bore area is smooth, without the defect such as scab or burning into sand, significantly improve quality and the qualification rate of foundry goods.
Embodiment 2
Foundry goods in the present embodiment is a heavy duty machine tools structural member, as shown in Figure 2, in such structural member, dark bowl configurations is more, adopt the cavityless casting method of prior art, the defects such as the surperficial scab that dark pit interior surface produces because back-up sand is tight because of the unreal very easy appearance of back-up sand and burning into sand, adopt method cavityless casting said structure part of the present invention to comprise following technological process successively, a) make and the component gasification mode 3 that bonds; B) fireproof coating is brushed on structural member gasified pattern 3 surface; C) drying structure part gasified pattern 3; D) place in the dark groove position of structural member gasified pattern 3 the Sand sticking-resistant chill part 4 matched with dark pit shape, wherein Sand sticking-resistant chill 4 length 20-25mm larger than dark pit depth, dark pit surface is stretched out in end, during installation, Sand sticking-resistant chill part 4 each is made to keep 10-15mm with the spacing of each respective face of dark pit by keeper 5; E) by the back-up sand jolt ramming in molding box of said structure part gasified pattern 3 fixed placement; F) pour into a mould; E) cleaning cast(ing) surface molding sand after foundry goods cooling, takes out Sand sticking-resistant chill part 4.In cavityless casting technique of the present invention, for the dark pit in heavy duty machine tools class formation part or dark pit in irregular shape, a Sand sticking-resistant chill part matched with dark pit shape is placed in advance at the dark pit position of this gasified pattern, in cast, when molten iron flow to dark pit inwall surrounding, because Sand sticking-resistant chill part 4 thermal conductivity factor is apparently higher than the thermal conductivity factor of molding sand, thus accelerate the cooling rate of high temperature liquid iron near it, and reduce the baking of high temperature liquid iron to neighbouring coating and molding sand, and then eliminate the scab phenomenon at the dark pit position of foundry goods, to improve quality and the qualification rate of foundry goods.And the gap rationally arranging each wall of Sand sticking-resistant chill part 4 wall corresponding to dark pit can the cooling rate of conservative control molten iron near dark pit, prevent molten iron from lowering the temperature too fast or crossing the slow and defect such as the foundry goods cold shut that causes or scab.
Embodiment 3
Foundry goods in the present embodiment and embodiment two similar be also large-sized structural parts, in this structural member, dark blind hole structure is more, difference from Example 2 is mainly, in step d), clamp the screw-thread steel of a 20-25mm more profound than dark hole with one heart as Quench ironware at the dark blind hole position of structural member gasified pattern by locating piece or locating ring, and make screw-thread steel surface keep 10-15mm spacing with dark blind hole inwall.In the present embodiment, adopt screw-thread steel as Quench ironware, the temperature suitably reducing molten iron can be played in molten iron cast equally, prevent the high baking to the coating near dark blind hole inwall and molding sand of high temperature iron, and then eliminate the defects such as the scab of dark blind hole internal face and burning into sand.
Claims (3)
1. prevent a casting technique for structure hole position scab in cavityless casting, it is characterized in that, comprise following technological process successively: a) make and the gasified pattern that bonds; B) fireproof coating is brushed on gasified pattern surface; C) gasified pattern is dried; D) at the structure deep/of gasified pattern or the Quench ironware of the setting of structure dell internal fixtion and deep hole or dell matching size; When described structure deep is the elongated hole of slender rectangular tube, in step d), described Quench ironware for gasified pattern structure deep inwall matched in clearance and thermal coefficient of expansion be greater than foundry goods the steel pipe of thermal coefficient of expansion cylinder iron, length 20-the 30mm larger than slim-lined construction hole length of described steel pipe, during installation, gasified pattern along the upper and lower fixed placement of hole length direction in molding box, described steel pipe lower end is concordant with gasified pattern endoporus bottom, and it is outer and sealed by mud bar with the endoporus end margin of gasified pattern that structure hole is stretched out in upper end; E) gasified pattern is placed on back-up sand jolt ramming in molding box; F) pour into a mould; G) foundry goods is cleared up.
2. the casting technique preventing structure hole position scab in cavityless casting according to claim 1, is characterized in that, the wall thickness of described steel pipe and the ratio of elongated tubular casting thickness are 1:4-5.
3. the casting technique preventing structure hole position scab in cavityless casting according to claim 2, is characterized in that, the wall thickness of described steel pipe and the ratio of elongated tubular casting thickness are 1:4.67.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339008.5A CN104959534B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique for preventing structure hole position scab in cavityless casting |
| CN201410319322.2A CN104117632B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique preventing structure hole position scab in cavityless casting |
| CN201510339047.5A CN104942228B (en) | 2014-07-07 | 2014-07-07 | Casting process for preventing structural hole part from bonding sand during full mould casting |
| PCT/CN2015/083249 WO2016004833A1 (en) | 2014-07-07 | 2015-07-03 | Casting process for preventing sand from sticking onto structural hole part in solid casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319322.2A CN104117632B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique preventing structure hole position scab in cavityless casting |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510339047.5A Division CN104942228B (en) | 2014-07-07 | 2014-07-07 | Casting process for preventing structural hole part from bonding sand during full mould casting |
| CN201510339008.5A Division CN104959534B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique for preventing structure hole position scab in cavityless casting |
Publications (2)
| Publication Number | Publication Date |
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| CN104117632A CN104117632A (en) | 2014-10-29 |
| CN104117632B true CN104117632B (en) | 2015-09-09 |
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| CN201410319322.2A Active CN104117632B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique preventing structure hole position scab in cavityless casting |
| CN201510339047.5A Active CN104942228B (en) | 2014-07-07 | 2014-07-07 | Casting process for preventing structural hole part from bonding sand during full mould casting |
| CN201510339008.5A Active CN104959534B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique for preventing structure hole position scab in cavityless casting |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510339047.5A Active CN104942228B (en) | 2014-07-07 | 2014-07-07 | Casting process for preventing structural hole part from bonding sand during full mould casting |
| CN201510339008.5A Active CN104959534B (en) | 2014-07-07 | 2014-07-07 | A kind of casting technique for preventing structure hole position scab in cavityless casting |
Country Status (2)
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| CN (3) | CN104117632B (en) |
| WO (1) | WO2016004833A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117632B (en) * | 2014-07-07 | 2015-09-09 | 宁夏共享装备有限公司 | A kind of casting technique preventing structure hole position scab in cavityless casting |
| JP6470141B2 (en) * | 2014-08-18 | 2019-02-13 | 株式会社神戸製鋼所 | Disappearance model casting method |
| CN104942227B (en) * | 2015-07-15 | 2017-01-25 | 四川省井研卫东机械制造厂 | V-method vacuum-forming method for side-concave heavy casting sand mold |
| CN105344941A (en) * | 2015-10-30 | 2016-02-24 | 宁夏共享模具有限公司 | Drying method for 3D printed sand mold |
| CN106825407B (en) * | 2016-12-22 | 2018-10-30 | 常州中车汽车零部件有限公司 | A kind of sand mold manufacture component and casting method |
| CN107282891B (en) * | 2017-06-29 | 2024-02-02 | 大连金河铸造有限公司 | Improved casting process of casting through hole and sand core structure |
| CN107931534B (en) * | 2017-11-24 | 2019-08-20 | 共享装备股份有限公司 | The 3D printing sand core of postposition chill and the fixing means of postposition chill are set |
| CN109226686A (en) * | 2018-11-29 | 2019-01-18 | 芜湖新兴新材料产业园有限公司 | The method of casting scab is prevented in lost foam casting process |
| CN113042686A (en) * | 2019-12-27 | 2021-06-29 | 南通虹冈铸钢有限公司 | Processing method for preventing defects of guide post hole of automobile stamping die and direct chill |
| CN111168014B (en) * | 2020-02-28 | 2024-03-29 | 广西玉柴机器股份有限公司 | Sand core structure and method for solving sand inclusion generated by large main oil duct resin sand core |
| CN113414354A (en) * | 2021-05-28 | 2021-09-21 | 四川共享铸造有限公司 | Method for preventing copper pipe from being melted through |
| CN114406190A (en) * | 2021-12-28 | 2022-04-29 | 东营一诚精密金属有限公司 | Process method for ensuring coaxiality of investment casting blind holes |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60191618A (en) * | 1984-03-09 | 1985-09-30 | Toyoda Autom Loom Works Ltd | Manufacture of casting having chilled layer partially |
| JPS60191618U (en) * | 1984-05-30 | 1985-12-19 | タニタ伸銅株式会社 | metal rain gutter water collector |
| JPH04251659A (en) * | 1990-12-26 | 1992-09-08 | Kitagawa Iron Works Co Ltd | Casting method for heat resistance metallic casting |
| CN100404170C (en) * | 2004-06-30 | 2008-07-23 | 黄刚 | Method for manufacturing crankcase of automobile engine by negative pressure cavityless casting |
| CN102151788A (en) * | 2011-05-20 | 2011-08-17 | 长沙楚顺置业有限责任公司 | Resin sand and foam plastic pattern casting method |
| CN202490914U (en) * | 2011-09-19 | 2012-10-17 | 南车戚墅堰机车车辆工艺研究所有限公司 | Chill structure at casting circular hole position |
| CN102794426A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Method for solving problem of burnt-on sand of thick-wall steel casting |
| CN102744390B (en) * | 2012-07-27 | 2014-01-15 | 湖南三星机床工具有限公司 | Vacuum lost foam casting process |
| CN102744389B (en) * | 2012-07-27 | 2014-03-26 | 湖南三星机床工具有限公司 | Dead head-free casting technology |
| CN103128232A (en) * | 2012-09-29 | 2013-06-05 | 江苏万盛铸造有限公司 | Casting mould of iron casting of robot shaft shell body |
| CN102873308A (en) * | 2012-10-09 | 2013-01-16 | 西安交通大学 | Method for lost foam casting of composite two-liquor bimetallic hammerhead of crusher |
| CN103789605A (en) * | 2014-02-19 | 2014-05-14 | 恒天重工股份有限公司 | Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device |
| CN104117632B (en) * | 2014-07-07 | 2015-09-09 | 宁夏共享装备有限公司 | A kind of casting technique preventing structure hole position scab in cavityless casting |
-
2014
- 2014-07-07 CN CN201410319322.2A patent/CN104117632B/en active Active
- 2014-07-07 CN CN201510339047.5A patent/CN104942228B/en active Active
- 2014-07-07 CN CN201510339008.5A patent/CN104959534B/en active Active
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2015
- 2015-07-03 WO PCT/CN2015/083249 patent/WO2016004833A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN104942228B (en) | 2017-05-10 |
| CN104959534A (en) | 2015-10-07 |
| WO2016004833A1 (en) | 2016-01-14 |
| CN104942228A (en) | 2015-09-30 |
| CN104117632A (en) | 2014-10-29 |
| CN104959534B (en) | 2017-04-05 |
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Address after: 750000, Beijing West Road, Xixia District, the Ningxia Hui Autonomous Region, 550, Yinchuan Patentee after: KOCEL MACHINERY Ltd. Address before: 750000, Beijing West Road, Xixia District, the Ningxia Hui Autonomous Region, 550, Yinchuan Patentee before: KOCEL MACHINERY CO.,LTD. Address after: 750000, Beijing West Road, Xixia District, the Ningxia Hui Autonomous Region, 550, Yinchuan Patentee after: KOCEL MACHINERY CO.,LTD. Address before: 750000, Beijing West Road, Xixia District, the Ningxia Hui Autonomous Region, 550, Yinchuan Patentee before: NINGXIA KOCEL MACHINERY Co.,Ltd. |