CN103624217A - Forming tool and forming method of lubricating oil chamber sand core of diesel engine front end box body - Google Patents
Forming tool and forming method of lubricating oil chamber sand core of diesel engine front end box body Download PDFInfo
- Publication number
- CN103624217A CN103624217A CN201310665630.6A CN201310665630A CN103624217A CN 103624217 A CN103624217 A CN 103624217A CN 201310665630 A CN201310665630 A CN 201310665630A CN 103624217 A CN103624217 A CN 103624217A
- Authority
- CN
- China
- Prior art keywords
- core
- sand core
- base plate
- lubricating cavity
- transverse slat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Abstract
The invention discloses a forming tool of a lubricating oil chamber sand core of a diesel engine front end box body. The forming tool comprises a middle sand core forming tool and a final integral sand core forming tool, wherein the middle sand core forming tool comprises a rectangular frame and a middle sand core bottom plate; two longitudinal side plates and two end face transverse plates of the final integral sand core forming tool are spliced into the rectangular frame; the bottom plate is mounted on the lower side of the rectangular frame in an embedding manner by a plurality of locating blocks; and the two ends of a middle transverse plate are clamped into the longitudinal side plates. A forming method comprises the following steps of 1) middle sand core prefabrication, 2) middle sand core location, 3) final integral sand core forming tool assembling, and 4) final forming of the lubricating oil chamber sand core of the front end box body. According to the forming tool and the forming method, a split structure of the lubricating oil chamber sand core of the diesel engine front end box body is changed into an integral structure, so that the length dimension and the perpendicularity tolerance of the lubricating oil chamber sand core of the front end box body meet requirements, a yield of the diesel engine front end box body is increased, and modeling and mold matching processes are facilitated.
Description
Technical field
The present invention relates to the forming frock of core for a kind of casting box model, particularly a kind of core frock for the moulding of diesel engine front end casing lubricating cavity, also relates to the forming method of this core, belongs to casting mould and technology field.
Background technology
At present, along with diesel engine new architecture is towards lightweight, high-power, modularization future development, the diesel engine front end casing of numerous becoming one of function is presented to the feature of complex structure, thin-walled, especially the lubricating cavity wall of diesel engine front end casing is thin, cavity geometry is complicated causes the making of lubricating cavity core difficult.Existing diesel engine front end casing lubricating cavity core adopts split-type structural, and core is longitudinally divided into three sections of cores and splices successively, by the long draw through three sections of cores, is spliced into integral body.Lubricating cavity core length dimension and the squareness tolerance of this splicing construction are all wayward, when the machined of front end casing, often occur in front end casing between two cavitys that wall thickness connects, the processing of external flanges mouth less than etc. problems, cause diesel engine front end casing scrappage very high, production cost improves greatly, and production efficiency is had a strong impact on.
Summary of the invention
The object of this invention is to provide a kind of all-in-one-piece diesel engine front end casing lubricating cavity core forming frock, lubricating cavity core length dimension and the squareness tolerance of front end casing are met the requirements, improve the product qualified rate of diesel engine front end case.
The present invention is achieved by the following technical programs:
A kind of front end casing lubricating cavity core forming frock, comprise the middle core forming frock of separation-type and detachable final integral core forming frock, in the middle of described separation-type, core forming frock comprises Integral rectangular framework and the middle core base plate that is inlaid in Integral rectangular framework underside, in the middle of described, on core base plate, have the several special-shaped counterbore that the superimposed core head shapes with middle core matches, in the middle of the distance of several special-shaped counterbores, be provided with base plate circular hole, described detachable final integral core forming frock comprises base plate, longitudinal side plate of both sides, the end face transverse slat at two ends and middle transverse slat, described longitudinal side plate inner side is shaped with the several raised lines that match with front end casing lubricating cavity core longitudinal shape, two longitudinal side plates, two end face transverse slats are spliced into rectangular frame by the first horizontal draw-in groove at longitudinal side plate two ends respectively, base plate is inlaid in rectangular frame downside by several piece locating piece, described rectangular frame two ends are clamped and are connected by several securing members that pass across longitudinal side plate two ends respectively, middle transverse slat two ends are stuck in two the second horizontal draw-in grooves in the middle of longitudinal side plate medial surface.
Object of the present invention can also further realize by following technical measures.
Aforesaid front end casing lubricating cavity core forming frock, in the middle of wherein said, transverse slat becomes L shaped, L shaped level board is resisted against on base plate, L shaped vertical panel is divided into several piece vertical panel piecemeal, in the rectangle vertical panel that described several piece vertical panel piecemeal pieces together, have the several irregularly-shaped holes that match with middle core shape, transverse slat circular hole in the middle of being provided with in the middle of the distance of several irregularly-shaped holes, vertical panel two ends are stuck in two the second horizontal draw-in grooves in the middle of longitudinal side plate medial surface.
Aforesaid front end casing lubricating cavity core forming frock, wherein said Integral rectangular framework one end is provided with upper plate, and described upper plate one side is resisted against corresponding end face transverse slat medial surface upside.
A forming method for front end casing lubricating cavity core, comprises the following steps:
Round metal bars is inserted in the middle core forming frock of separation-type, and round metal bars lower end is vertically injected in the positioning round orifice on frock base plate, and the cavity that fills up the middle core forming frock of separation-type with furan resin self curing sand makes middle core; In the middle of described, after core forming and hardening, take out round metal bars, by 180 ° of core forming frock frock upsets in the middle of separation-type, middle core self falling, and remove by the assembled middle core base plate of several piece floor pack, at middle core outer surface paint, in the middle of completing, core is made;
2) core location in the middle of
In the middle of middle core is positioned at, transverse slat deviates from the side of upper plate one side, the protruding pipe of middle core one side embeds in middle transverse slat circular hole, the middle transverse slat of core in the middle of installing is positioned on base plate, then upside is covered with to the steel pipe level of a plurality of steam vents through the protruding pipe of middle core;
3) assembled detachable final integral core forming frock
Two longitudinal side plates, two end face transverse slats are positioned on base plate, by several securing members that pass across longitudinal side plate two ends, two longitudinal side plates, two end face transverse slats are clamped to the assembled rectangular frame that connects into, steel pipe both ends of the surface are resisted against respectively on end face transverse slat medial surface;
4) front end casing lubricating cavity core final molding
In the cavity of detachable final integral core forming frock, insert furan resin self curing sand, after front end casing lubricating cavity core forming and hardening, remove rectangular frame, blocked breaking is except the vertical panel piecemeal of middle transverse slat, take out front end casing lubricating cavity core, at front end casing lubricating cavity core outer surface paint, complete the making of front end casing lubricating cavity core.
The forming method of aforesaid a kind of front end casing lubricating cavity core, wherein said round metal bars diameter is greater than diameter of steel tube 2～3mm.
Front end casing lubricating cavity core forming frock of the present invention changes the split-type structural of the diesel engine front end casing lubricating cavity core of existing three sections of cores into monolithic construction, lubricating cavity core length dimension and the squareness tolerance of front end casing are met the requirements, improved the yield rate of diesel engine front end casing, facilitated moulding and joined mold process.The forming method of front end casing lubricating cavity core of the present invention partly changes the complex structure in the middle of front end casing lubricating cavity core into and first in the middle of separation-type, in core forming frock, precasts separately middle core, and then middle core is positioned in detachable final integral core forming frock, finally in final integral core forming frock, the furan resin self curing sand of middle core and filling is condensed into monoblock type front end casing lubricating cavity core, make complex structure, meet the integral sand core of diesel engine front end body structure requirement.
Advantage and disadvantage of the present invention, the non-limitative illustration by preferred embodiment below is for illustration and explanation, and these embodiment, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the front view of front end casing lubricating cavity core;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the top view of core forming frock in the middle of separation-type of the present invention;
Fig. 4 is the B-B cutaway view of Fig. 4;
Fig. 5 is the top view of detachable final integral core forming frock of the present invention;
Fig. 6 is the C-C partial sectional view of Fig. 5.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As depicted in figs. 1 and 2, the length of front end casing lubricating cavity core 1 reaches more than 1 meter, and the cavity shape of cross section of intermediate portion is complicated, and prior art cannot be made all-in-one-piece front end casing lubricating cavity core 1.
The present invention includes the middle core forming frock 3 of separation-type and detachable final integral core forming frock 4, as shown in Figure 3 and Figure 4, in the middle of separation-type, core forming frock 3 comprises Integral rectangular framework 31 and the middle core base plate 32 that is inlaid in Integral rectangular framework underside, in the middle of described, on core base plate 32, have the several special-shaped counterbore 321 matching with middle core shape, in the middle of the distance of several special-shaped counterbores 321, be provided with base plate circular hole 322.The rectangular configuration that middle core base plate 32 also can adopt polylith floor pack 323 to be combined into.
As shown in Figure 5 and Figure 6, detachable final integral core forming frock 4 comprises longitudinal side plate 42 of base plate 41, both sides, the end face transverse slat 43 at two ends and middle transverse slat 44, and longitudinally side plate 42 outsides are with several perpendicular muscle 421, to improve its intensity.Longitudinally side plate 42 inner sides are shaped with two raised lines 422 that match with front end casing lubricating cavity core longitudinal shape, two longitudinal side plates 42, two end face transverse slats 43 are spliced into rectangular frame by the first horizontal draw-in groove 423 at longitudinal side plate 42 two ends respectively, base plate 41 is inlaid in rectangular frame downside by several piece locating piece 411, and rectangular frame two ends are by totally 4 fastening screw nut groups 45 clamping connections that pass across longitudinal side plate two ends.
Middle 44 one-tenth of transverse slats are L shaped, L shaped level board 441 is on base plate 41, L shaped vertical panel 442 is divided into several piece vertical panel piecemeal, described several piece vertical panel piecemeal pieces together and in orthogonal vertical panel 442, has 2 irregularly-shaped holes that match with middle core shape, transverse slat circular hole 443 in the middle of being provided with in the middle of the distance of 2 irregularly-shaped holes, vertical panel 442 two ends are stuck in two the second horizontal draw-in grooves 424 in the middle of longitudinal side plate 42.Integral rectangular framework one end is provided with upper plate 46, and described upper plate 46 1 sides are resisted against corresponding end face transverse slat 43 medial surface upsides.
Forming method of the present invention, comprises the following steps:
1) prefabricated middle core 11
Diameter is greater than to diameter of steel tube 2～3mm aluminium alloy bars and inserts in the middle core forming frock 3 of separation-type, aluminium alloy bars lower end is injected in the positioning round orifice 321 on frock base plate; The cavity that fills up the middle core forming frock 3 of separation-type with furan resin self curing sand makes middle core 11; After described middle core 11 forming and hardenings, take out aluminium alloy bars, by 180 ° of core forming frock frock upsets in the middle of separation-type, middle core 11 self fallings, and remove by the assembled middle core base plate 32 of several piece floor pack 322, at middle core 11 outer surface paints, in the middle of completing, core 11 is made;
2) core 11 location in the middle of
In the middle of middle core 11 is positioned at, transverse slat 44 deviates from the side of upper plate 46 1 sides, the protruding pipe 111 of middle core 11 1 sides embeds in middle transverse slat circular hole 443, the middle transverse slat 44 of core 11 in the middle of installing is positioned on base plate 41, then the protruding pipe 111 of steel pipe 2 levels of a plurality of steam vents through middle core 11 will be covered with on outer peripheral face, being supported on steel pipe 2 in protruding pipe 111 both can exhaust, can improve again the intensity of front end casing lubricating cavity core 1.
3) assembled detachable final integral core forming frock
Two longitudinal side plates 42, two end face transverse slats 43 are positioned on base plate, by 4 securing members that pass across longitudinal side plate 42 two ends, two longitudinal side plates 42, two end face transverse slats 43 are clamped to the assembled rectangular frame that connects into, steel pipe 2 both ends of the surface are resisted against respectively on end face transverse slat 43 medial surfaces.
4) front end casing lubricating cavity core 1 final molding
In the cavity of detachable final integral core forming frock 4, insert furan resin self curing sand, after front end casing lubricating cavity core forming and hardening, remove rectangular frame, blocked breaking is except the vertical panel piecemeal of middle transverse slat 44, take out front end casing lubricating cavity core, at front end casing lubricating cavity core 1 outer surface paint, complete the making of front end casing lubricating cavity core 1.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (6)
1. a front end casing lubricating cavity core forming frock, it is characterized in that: comprise the middle core forming frock of separation-type and detachable final integral core forming frock, in the middle of described separation-type, core forming frock comprises Integral rectangular framework and the middle core base plate that is inlaid in Integral rectangular framework underside, in the middle of described, on core base plate, have the several special-shaped counterbore that the superimposed core head shapes with middle core matches, in the middle of the distance of several special-shaped counterbores, be provided with base plate circular hole, described detachable final integral core forming frock comprises base plate, longitudinal side plate of both sides, the end face transverse slat at two ends and middle transverse slat, described longitudinal side plate inner side is shaped with the several raised lines that match with front end casing lubricating cavity core longitudinal shape, two longitudinal side plates, two end face transverse slats are spliced into rectangular frame by the first horizontal draw-in groove at longitudinal side plate two ends respectively, base plate is inlaid in rectangular frame downside by several piece locating piece, described rectangular frame two ends are clamped and are connected by several securing members that pass across longitudinal side plate two ends respectively, middle transverse slat two ends are stuck in two the second horizontal draw-in grooves in the middle of longitudinal side plate medial surface.
2. front end casing lubricating cavity core forming frock as claimed in claim 1, it is characterized in that: in the middle of described, transverse slat becomes L shaped, L shaped level board is resisted against on base plate, L shaped vertical panel is divided into several piece vertical panel piecemeal, in the rectangle vertical panel that described several piece vertical panel piecemeal pieces together, have the several irregularly-shaped holes that match with middle core shape, transverse slat circular hole in the middle of being provided with in the middle of the distance of several irregularly-shaped holes, vertical panel two ends are stuck in two the second horizontal draw-in grooves in the middle of longitudinal side plate medial surface.
3. front end casing lubricating cavity core forming frock as claimed in claim 1, is characterized in that: described Integral rectangular framework one end is provided with upper plate, and described upper plate one side is resisted against corresponding end face transverse slat medial surface upside.
4. front end casing lubricating cavity core forming frock as claimed in claim 1, is characterized in that: it is assembled that in the middle of described, core base plate adopts several piece floor pack.
5. a forming method for front end casing lubricating cavity core as claimed in claim 1, is characterized in that: comprise the following steps:
1) prefabricated middle core
Round metal bars is inserted in the middle core forming frock of separation-type, and round metal bars lower end is vertically injected in the positioning round orifice on frock base plate, and the cavity that fills up the middle core forming frock of separation-type with furan resin self curing sand makes middle core; In the middle of described, after core forming and hardening, take out round metal bars, by 180 ° of core forming frock frock upsets in the middle of separation-type, middle core self falling, and remove by the assembled middle core base plate of several piece floor pack, at middle core outer surface paint, in the middle of completing, core is made;
2) core location in the middle of
In the middle of middle core is positioned at, transverse slat deviates from the side of upper plate one side, the protruding pipe of middle core one side embeds in middle transverse slat circular hole, the middle transverse slat of core in the middle of installing is positioned on base plate, then upside is covered with to the steel pipe level of a plurality of steam vents through the protruding pipe of middle core;
3) assembled detachable final integral core forming frock
Two longitudinal side plates, two end face transverse slats are positioned on base plate, by several securing members that pass across longitudinal side plate two ends, two longitudinal side plates, two end face transverse slats are clamped to the assembled rectangular frame that connects into, steel pipe both ends of the surface are resisted against respectively on end face transverse slat medial surface;
4) front end casing lubricating cavity core final molding
In the cavity of detachable final integral core forming frock, insert furan resin self curing sand, after front end casing lubricating cavity core forming and hardening, remove rectangular frame, blocked breaking is except the vertical panel piecemeal of middle transverse slat, take out front end casing lubricating cavity core, at front end casing lubricating cavity core outer surface paint, complete the making of front end casing lubricating cavity core.
6. the forming method of front end casing lubricating cavity core as claimed in claim 5, is characterized in that, described round metal bars diameter is greater than diameter of steel tube 2～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310665630.6A CN103624217B (en) | 2013-12-11 | 2013-12-11 | Diesel engine front end box body forming tool and forming method of lubricating oil chamber sand core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310665630.6A CN103624217B (en) | 2013-12-11 | 2013-12-11 | Diesel engine front end box body forming tool and forming method of lubricating oil chamber sand core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103624217A true CN103624217A (en) | 2014-03-12 |
| CN103624217B CN103624217B (en) | 2016-08-17 |
Family
ID=50205868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310665630.6A Active CN103624217B (en) | 2013-12-11 | 2013-12-11 | Diesel engine front end box body forming tool and forming method of lubricating oil chamber sand core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103624217B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788019A (en) * | 2017-04-28 | 2018-11-13 | 赛峰航空器发动机 | Core for manufacturing turbine blade |
| CN112846091A (en) * | 2019-11-27 | 2021-05-28 | 尼玛克股份有限公司 | Metal casting with cores |
| CN114871386A (en) * | 2022-07-07 | 2022-08-09 | 中国航发北京航空材料研究院 | Tool for reverse-inclination resin sand core combination and combination assembly method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201482922U (en) * | 2009-08-05 | 2010-05-26 | 广西玉柴机器股份有限公司 | Structure for casting large-sized front end box of ship engine |
| GB2469825A (en) * | 2009-04-29 | 2010-11-03 | Gm Global Tech Operations Inc | I.c. engine cylinder head combustion chamber cooling passage arrangement and casting mould |
| CN102294440A (en) * | 2011-08-30 | 2011-12-28 | 南车戚墅堰机车有限公司 | Method for fixing deep-drawn pipeline core for casting large-scale machine body |
| WO2012032246A1 (en) * | 2010-09-09 | 2012-03-15 | Renault S.A.S. | Cylinder housing for an internal combustion engine, method for manufacturing such a housing, and housing mould for implementing said method |
| CN202427893U (en) * | 2012-01-06 | 2012-09-12 | 广西玉柴机器股份有限公司 | Mould of main oil duct sand core of large diesel engine |
| CN203081532U (en) * | 2012-12-10 | 2013-07-24 | 重庆普什机械有限责任公司 | Diesel engine auxiliary supporting slide oil cavity |
| CN203649323U (en) * | 2013-12-11 | 2014-06-18 | 中船动力有限公司 | Diesel engine front end box lubricating oil cavity sand core forming tool |
-
2013
- 2013-12-11 CN CN201310665630.6A patent/CN103624217B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2469825A (en) * | 2009-04-29 | 2010-11-03 | Gm Global Tech Operations Inc | I.c. engine cylinder head combustion chamber cooling passage arrangement and casting mould |
| CN201482922U (en) * | 2009-08-05 | 2010-05-26 | 广西玉柴机器股份有限公司 | Structure for casting large-sized front end box of ship engine |
| WO2012032246A1 (en) * | 2010-09-09 | 2012-03-15 | Renault S.A.S. | Cylinder housing for an internal combustion engine, method for manufacturing such a housing, and housing mould for implementing said method |
| CN102294440A (en) * | 2011-08-30 | 2011-12-28 | 南车戚墅堰机车有限公司 | Method for fixing deep-drawn pipeline core for casting large-scale machine body |
| CN202427893U (en) * | 2012-01-06 | 2012-09-12 | 广西玉柴机器股份有限公司 | Mould of main oil duct sand core of large diesel engine |
| CN203081532U (en) * | 2012-12-10 | 2013-07-24 | 重庆普什机械有限责任公司 | Diesel engine auxiliary supporting slide oil cavity |
| CN203649323U (en) * | 2013-12-11 | 2014-06-18 | 中船动力有限公司 | Diesel engine front end box lubricating oil cavity sand core forming tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788019A (en) * | 2017-04-28 | 2018-11-13 | 赛峰航空器发动机 | Core for manufacturing turbine blade |
| CN108788019B (en) * | 2017-04-28 | 2022-07-19 | 赛峰航空器发动机 | Core for manufacturing turbine blades |
| CN112846091A (en) * | 2019-11-27 | 2021-05-28 | 尼玛克股份有限公司 | Metal casting with cores |
| EP3827911A1 (en) * | 2019-11-27 | 2021-06-02 | Nemak, S.A.B. de C.V. | Metal casting with cores |
| CN114871386A (en) * | 2022-07-07 | 2022-08-09 | 中国航发北京航空材料研究院 | Tool for reverse-inclination resin sand core combination and combination assembly method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103624217B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104707939A (en) | Cast sand core for cylinder cover of diesel engine | |
| CN207026420U (en) | A kind of sand core structure of turbine blade steel-casting | |
| CN204486722U (en) | The casting sand core of diesel engine cylinder cover | |
| CN101376163B (en) | Technique for forming class form of flange bolt hole casting parts | |
| CN103624217A (en) | Forming tool and forming method of lubricating oil chamber sand core of diesel engine front end box body | |
| CN101486071A (en) | Technique and equipment for pouring flanged fitting combination | |
| CN105268925B (en) | The casting group core and its formative method of a kind of compressor of air conditioner disc-like casting | |
| CN103008557A (en) | Casting core assembly of compressor casing and moulding method of same | |
| CN104826989A (en) | Method for casting diesel engine rack | |
| CN204262283U (en) | Aluminium alloy casting sleeper beam elongated core segmentation core box | |
| CN203649323U (en) | Diesel engine front end box lubricating oil cavity sand core forming tool | |
| CN201552286U (en) | Novel cylinder core cold-box mould for automobile engine body core making center | |
| CN102397990A (en) | Bolt hole sand mold positioning process | |
| CN102527945A (en) | Sand lined metal mold casting method for manufacturing sand core for middle and rear axle castings for automobile | |
| CN104028695B (en) | A kind of subsides chamber cavityless casting method | |
| CN202937003U (en) | Aluminium alloy easy-dismounting formwork for buildings | |
| CN210450829U (en) | Ultra-large manual core box die of V-shaped engine cylinder block | |
| CN103551524B (en) | Casting method for multislot belt wheel, core making mold used in casting method and casting mold | |
| CN106541083A (en) | The core-making method of large-sized diesel engine cylinder water channel core | |
| CN103861996B (en) | The mould making method of multi-cavity compound casting | |
| CN203621405U (en) | Girder casting die with thin-walled tube | |
| CN204249251U (en) | Large-scale frame series products injection moulding palletizing die structure | |
| CN206229969U (en) | Large-sized diesel engine cylinder water channel core mold | |
| CN203125673U (en) | Die capable of being dismounted | |
| CN203737928U (en) | Mold structure for simultaneously machining multiple automobile damping system parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 212211 No. 402, Changjiang Road, Zhenjiang City, Jiangsu Province Patentee after: China Shipbuilding Power Zhenjiang Co.,Ltd. Address before: 402 Changjiang Road, Runzhou District, Zhenjiang City, Jiangsu Province Patentee before: CSSC MARINE POWER Co.,Ltd. |
|
| CP03 | Change of name, title or address |