CN106735083A - A kind of hyperbar casting head prefabricated component enhancing Piston mould - Google Patents
A kind of hyperbar casting head prefabricated component enhancing Piston mould Download PDFInfo
- Publication number
- CN106735083A CN106735083A CN201611170544.8A CN201611170544A CN106735083A CN 106735083 A CN106735083 A CN 106735083A CN 201611170544 A CN201611170544 A CN 201611170544A CN 106735083 A CN106735083 A CN 106735083A
- Authority
- CN
- China
- Prior art keywords
- external mold
- prefabricated component
- hyperbar
- backform
- block
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 28
- 230000002708 enhancing effect Effects 0.000 title abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 210000004907 gland Anatomy 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000001125 extrusion Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 14
- 239000004411 aluminium Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 150000003839 salts Chemical group 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
- B22D19/0027—Cylinders, pistons pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Hyperbar casting head prefabricated component enhancing Piston mould of the invention, it is characterised in that：Including the external mold, inner core, backform, seam circle and the pin core that cooperate；External mold is formed by left and right two halves Symmetric Composite, and left and right two halves being capable of folding；Backform can be from external mold upper end and external mold pairing；Inner core can be extended upwardly into inside external mold from external mold lower end；Pin core includes left and right two, on two external molds in left and right；Seam circle is connected with external mold.The beneficial effects of the invention are as follows：Piston mould is strengthened using the hyperbar cast pistons head prefabricated component, because atmospheric pressure only has 5MPa~15MPa, equivalent to the 1/10 of common extrusion casint pressure, mould structure is simple, flexible movements, mould cost only uses the 1/3 of extrusion casint, and production efficiency is higher, it is possible to increase more than 1 times of production efficiency.
Description
Technical field
The invention belongs to casting for piston field of die equipment, it is related to a kind of hyperbar casting head prefabricated component enhancing piston mould
Tool.
Background technology
With continuing to develop for society, people major motor corporations, start to the emission request more and more higher of vehicle exhaust
Machine factory improves constantly the explosion pressure and liter of engine in order to make the product produced reach emission request from design
Power, the intensity of common aluminum piston has reached material limits, and growing design requirement can not be increasingly met, we
Must be considered in piston crown combustion chamber position higher to intensity requirement on the basis of aluminum piston strengthens, and this piston must
It is so the developing direction of Future Automobile Engine piston, this prefabricated component combustion chamber enhancing piston is under pressure high temperature
Liquid aluminium liquid is squeezed into what is formed in prefabricated component, and because relatively costly, manufacture difficulty is larger, current this piston is also considerably less
See, the most frequently used mode of production is extrusion casint, and low production efficiency, yield rate is low, and production difficulty is very big.
Prior art major defect is as follows：
1st, mould is complicated, and manufacturing expense is expensive：This Squeeze Casting is coagulation forming under pressure, and no feeding emits
Mouthful, pressure is higher, and mold cavity pressure is high, and die manufacturing cost is high；
2nd, prior art production efficiency is low：Many actions are all that operator has been manually done, and the daily output is low；
3rd, die life is relatively low, because extrusion casint pressure is higher, some service lifes with the mold component of aluminium liquid directly contact
Only 5000, die life is about short；
4th, specific yield cost of labor is higher：Prior art needs 3 people to coordinate and could operate 1 equipment；
5th, follow-up machining cost is higher：Not out, such as piston pin hole, piston seam are all many structure castings of prior art
Process what is realized by subsequent mechanical.
The content of the invention
The present invention is in order to make up the deficiencies in the prior art, there is provided a kind of high working efficiency, the hyperbar of long service life
Casting head prefabricated component enhancing Piston mould.The mould is the hyperbar casting for piston mould with high pressure air as pressure medium
Tool, this mould can realize that prefabricated component combustion chamber strengthens the production of piston, with simple and light, it is easy to operate, can
Realize the advantages of prefabricated component is accurately positioned, and production efficiency is high.
The present invention is achieved through the following technical solutions：
Hyperbar casting head prefabricated component enhancing Piston mould of the invention, it is characterised in that：Including the external mold, interior for cooperating
Core, backform, seam circle and pin core；External mold is formed by left and right two halves Symmetric Composite, and left and right two halves being capable of folding；Backform can be from outer
Mould upper end and external mold pairing；Inner core can be extended upwardly into inside external mold from external mold lower end；Pin core includes left and right two, installed in a left side
On right two external molds；Seam circle is connected with external mold.
External mold includes block, outer mode slider and sliding block contiguous block under the external mold being connected with each other, and outer mode slider is by block under external mold
On slide be arranged under external mold on block, the outer mode slider in left and right two can realize open and close movement, outer mode slider and sliding block
Contiguous block is fixedly connected, and pin core is fixed by screws under external mold on block.
Backform includes block, insulating riser sleeve and rising head jacket gland under the backform being connected with each other, and block can be with external mold under backform
Contact, fixedly mounts insulating riser sleeve on block under backform, rising head jacket gland is arranged on insulating riser sleeve outside, on rising head jacket gland
It is provided with pressure-air import.
Seam circle is fixed on casting machine worktable；Inner core connection oil cylinder is realized moving up and down, and moves to and seam circle
Cooperation position；The outer mode slider connection oil cylinder of external mold realizes open and close movement, and backform connection oil cylinder is realized moving up and down.
Outer mode slider is provided with prefabricated component positioning table, and prefabricated component is placed on prefabricated component positioning table.
The material of prefabricated component uses alumina fibre or aluminium borate whisker；The making material of insulating riser sleeve be TC4 or
QTANi30Si5Cr5。
The exhaust seam of 0.2mm is provided with outer mode slider and backform at block cooperation.
External mold is provided with edge ring positioning boss, and outer mode slider is provided with pressure edge ring convex platform, can realize that edge ring is accurately positioned.
External mold is provided with protection boss；The running channel string water cooling passageway for being passed through cooling water is designed with external mold.
Block is provided with mechanical clamping apparatus under backform, and the locked mode inclined-plane after backform is descending and on outer mode slider coordinates realizes machine
Tool locked mode.
The beneficial effects of the invention are as follows：
Piston mould is strengthened using the hyperbar cast pistons head prefabricated component, because atmospheric pressure only has 5MPa~15MPa, quite
In the 1/10 of common extrusion casint pressure, mould structure is simple, flexible movements, and mould cost only uses the 1/3 of extrusion casint,
Production efficiency is higher, it is possible to increase more than 1 times of production efficiency.
Using the mould, by the way of having under usinging on positioning boss and there is pressure to inlay ring convex platform because of edge ring positioning, can accurately protect
Card edge ring position, is reduced because edge ring position changes the foundary loss for causing.
Using the mould, because being provided with exhaust seam and vent groove configuration near prefabricated component, prefabricated component enters aluminium under pressure
It is all right, microstructure is examined under a microscope, without Micro shrinkage presence is found, piston combustion bowl prefabricated component strengthens position
Testing Tensile Strength at Elevated Temperature（350℃）More than 200MPa can be reached, is more than 2 times of aluminium base body region intensity, enhancing effect is non-
Chang Mingxian.
Using the mould, using the positioning table positioning on outer mode slider, prefabricated component accurate positioning is errorless, and operation for prefabricated component
It is convenient and swift.
Through experiment, the prefabricated component combustion chamber that the forging type cast using said structure mould and hyperbar is produced increases
Strong piston, disclosure satisfy that current engine detonation pressure high, the design requirement of power per liter high, and engine test has been passed through at present.
Brief description of the drawings
Accompanying drawing is structural representation of the invention.
Fig. 1 is sectional structure chart of the invention；Fig. 2 is left view profile of the invention；Fig. 3 is cast outer mold structure of the invention
Figure；Fig. 4 is external mold top view of the invention；Fig. 5 is backform sectional structure chart of the invention.
Wherein, 1 external mold, 2 inner cores, 3 backforms, 4 seam circles, 5 pin cores, block under 6 external molds, 7 outer mode sliders, 8 sliding block contiguous blocks,
9 times guide-localization grooves, 10 side guide-localization grooves, 11 edge ring positioning boss, 12 pressure edge ring convex platforms, 13 locked mode inclined-planes, under 14 backforms
Block, 15 rising head jacket glands, 16 insulating riser sleeves, 17 mechanical clamping apparatus, 18 air discharge ducts, 19 pressure-air imports, 20 prefabricated components
Positioning table, 21 sprue cups, 22 salt cores, 23 edge rings, 24 prefabricated components, 25 protection boss, 26 exhaust seams, 27 running channel string water coolings are led to
Road.
Specific embodiment
Accompanying drawing is a kind of specific embodiment of the invention.
Hyperbar casting head prefabricated component enhancing Piston mould of the invention, including external mold 1, inner core 2, the top for cooperating
Mould 3, seam circle 4 and pin core 5；External mold is formed by left and right two halves Symmetric Composite, and left and right two halves being capable of folding；Backform can be from external mold
Upper end and external mold pairing；Inner core can be extended upwardly into inside external mold from external mold lower end；Pin core includes left and right two, installed in left and right
On two external molds；Seam circle is connected with external mold.
External mold 1 includes block 6, outer mode slider 7 and sliding block contiguous block 8 under the external mold being connected with each other, and outer mode slider passes through external mold
Slide on lower piece is arranged under external mold on block, and the outer mode slider in left and right two can realize open and close movement, outer mode slider and
Sliding block contiguous block is fixedly connected, and pin core 5 is fixed by screws under external mold on block 6.
Backform 3 includes block 14, insulating riser sleeve 16 and rising head jacket gland 15 under the backform being connected with each other, and block can under backform
Contacted with external mold, fixedly mount insulating riser sleeve under backform on block, rising head jacket gland is arranged on insulating riser sleeve outside, riser buss
Gland is provided with pressure-air import.
Seam circle 4 is bolted on casting machine worktable；The connection oil cylinder of inner core 2 is realized moving up and down, and moves to
With the cooperation position of seam circle；The outer mode slider connection oil cylinder of external mold realizes open and close movement, and backform connection oil cylinder is realized transporting up and down
It is dynamic.
Outer mode slider 7 can be realized after the lower guide-localization groove 9 on block under external mold 6 and side guide-localization groove 10 are connected
Slided on block under external mold.External mold 1 can the open and close movement on casting machine working slider, backform 3 can be with the drive of oil cylinder
Realize moving up and down.
A kind of hyperbar is the compression casting mode of medium, and during work, high pressure air enters in pressure-air import 19
Enter, the pressure limit of compressed air is in 5MPa~15MPa；
The external mold 1 is provided with external mold slide block structure, and outer mode slider 7 can be realized being horizontally slipped on block 6 under external mold, and external mold is slided
Block is provided with prefabricated component positioning table 20, and prefabricated component is placed on prefabricated component positioning table, can accurately fix the position of prefabricated component 24；
The material of the prefabricated component 24 can be various ceramic materials such as alumina fibre and aluminium borate whisker；
The mould is provided with the exhaust seam 26 of 0.2mm at the cooperation of block 14 under outer mode slider 7 and backform, is easy to prefabricated component 24 adding
Pressure excludes the air in prefabricated component during filling aluminium；
The mould external mold is provided with edge ring positioning boss 11, and the outer mode slider 7 of the mould is provided with pressure edge ring convex platform 12, can
Realize that edge ring 23 is accurately positioned, prevent from inlaying toroidal drift；
The mould external mold is provided with protection boss 25, and accident splash causes casualty accident after preventing aluminium liquid from pressurizeing；
Running channel string water cooling passageway 27 is designed with the mould external mold, after aluminium liquid cast, in running channel string water cooling passageway 27
Cooling water cooling is passed through, enables runner section rapid solidification, aluminium liquid causes casualty accident from sprue cup splash after preventing pressurization；
The making material of the mould insulating riser sleeve 16 is TC4 or QTANi30Si5Cr5, and both materials have higher strong
Degree, can not damage under pressure, and cutter has relatively low heat transfer coefficient（Heat transfer coefficient only has the 1/5 of common die steel）,
Insulating riser sleeve can be played a part of；
Block 14 is provided with mechanical clamping apparatus 17, the locked mode inclined-plane after backform is descending and on outer mode slider 7 under the mold top holder
13 coordinate the mechanical locked mode of realization, prevent mould to be open in pressure process China and foreign countries mode slider 7.
Hyperbar casting head prefabricated component of the invention strengthens Piston mould, and its course of work is：
1st, inner core 2 is moved from lower to upper by oil cylinder, moves to the cooperation position with seam circle；.
2nd, baked salt core 22 is fixed on the salt core locating platform of inner core 2；
3rd, outer mode slider 7 is linked under external mold on block 6 by lower guide-localization groove 9 and side guide-localization groove 10, sliding block contiguous block 8
It is fixed by screws on outer mode slider 7, in the presence of oil cylinder, outer mode slider 7 can be slided on block under external mold 6, external mold
The initial position of sliding block 7 is in separated position；
4th, in the presence of external mold oil cylinder, promote external mold 1 to be slided on casting machine worktable, external mold 1 is in matched moulds state；
5th, the edge ring 23 handled well is fixed on edge ring positioning boss 11；
6th, in the presence of oil cylinder, outer mode slider 7 is promoted, outer mode slider 7 is in matched moulds state, while pressing the He of edge ring convex platform 12
The upper plane contact of ring 23 is inlayed, is played to the positioning action up and down of edge ring 23；
7th, baked prefabricated component 24 is fixed on prefabricated component positioning table 20；
8th, backform 3 is moved downward in the presence of oil cylinder and reaches matched moulds state, now, the mechanical clamping apparatus 17 on backform 3
Coordinate contact to play locked mode with the locked mode inclined-plane 13 on outer mode slider 7 to act on；
9th, high temperature aluminium liquid is poured at sprue cup 21, aluminium liquid is full of whole closed die cavity；
10th, cooling water is passed through in running channel string water cooling passageway 27 to be cooled down；
11st, after mold cavity pours into high temperature aluminium liquid 10-15 seconds, pressure is passed through for 5MPa~15MPa in pressure-air import 19
Gases at high pressure；
12nd, high temperature aluminium liquid is quickly poured in prefabricated component 24 under the effect of the pressure, while original air passes through in prefabricated component 24
Exhaust seam 26 and air discharge duct 18 are discharged；
13rd, continue certain pressing time, gases at high pressure are discharged in pressure-air import 19, treat that Piston Casting solidification is completed, open
Mould, and remove lower piston blank with manipulator；
Into next working cycles ....
Claims (10)
1. a kind of hyperbar casting head prefabricated component strengthens Piston mould, it is characterised in that：Including the external mold, interior for cooperating
Core, backform, seam circle and pin core；External mold is formed by left and right two halves Symmetric Composite, and left and right two halves being capable of folding；Backform can be from outer
Mould upper end and external mold pairing；Inner core can be extended upwardly into inside external mold from external mold lower end；Pin core includes left and right two, installed in a left side
On right two external molds；Seam circle is connected with external mold.
2. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：External mold includes
Block, outer mode slider and sliding block contiguous block under the external mold of interconnection, outer mode slider are installed by the slide on block under external mold
On block under external mold, the outer mode slider in left and right two can realize open and close movement, and outer mode slider is fixedly connected with sliding block contiguous block, pin
Core is fixed by screws under external mold on block.
3. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Backform includes
Block, insulating riser sleeve and rising head jacket gland under the backform of interconnection, block can be contacted with external mold under backform, solid on block under backform
Dingan County fills insulating riser sleeve, and rising head jacket gland is arranged on insulating riser sleeve outside, and rising head jacket gland is provided with pressure-air import.
4. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Seam circle is consolidated
It is scheduled on casting machine worktable；Inner core connection oil cylinder is realized moving up and down, and moves to the cooperation position with seam circle；Outside external mold
Mode slider connection oil cylinder realizes open and close movement, and backform connection oil cylinder is realized moving up and down.
5. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Outer mode slider
Prefabricated component positioning table is provided with, prefabricated component is placed on prefabricated component positioning table.
6. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Prefabricated component
Material uses alumina fibre or aluminium borate whisker；The making material of insulating riser sleeve is TC4 or QTANi30Si5Cr5.
7. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Outer mode slider
Stitched with the exhaust that 0.2mm is provided with block cooperation under backform.
8. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Set on external mold
There is edge ring positioning boss, outer mode slider is provided with pressure edge ring convex platform, can realize that edge ring is accurately positioned.
9. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Set on external mold
There is protection boss；The running channel string water cooling passageway for being passed through cooling water is designed with external mold.
10. hyperbar casting head prefabricated component according to claim 1 strengthens Piston mould, it is characterised in that：Under backform
Block is provided with mechanical clamping apparatus, and the locked mode inclined-plane after backform is descending and on outer mode slider coordinates realizes mechanical locked mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170544.8A CN106735083B (en) | 2016-12-28 | 2016-12-28 | A kind of hyperbar casting head prefabricated component enhancing Piston mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170544.8A CN106735083B (en) | 2016-12-28 | 2016-12-28 | A kind of hyperbar casting head prefabricated component enhancing Piston mould |
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| Publication Number | Publication Date |
|---|---|
| CN106735083A true CN106735083A (en) | 2017-05-31 |
| CN106735083B CN106735083B (en) | 2018-05-11 |
Family
ID=58892349
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856653A (en) * | 2017-06-29 | 2018-11-23 | 西安康博新材料科技有限公司 | A kind of high-power engine piston prepares mold and piston preparation method |
| CN112247117A (en) * | 2020-07-24 | 2021-01-22 | 南平华田机械工业有限公司 | Mould assembly for greatly improving casting yield of aluminum piston blank of heavy diesel engine |
| CN113000813A (en) * | 2021-02-23 | 2021-06-22 | 广州和德轻量化成型技术有限公司 | Die and method for producing aluminum alloy composite piston by indirect extrusion casting process |
| CN114346219A (en) * | 2021-11-19 | 2022-04-15 | 山东双港活塞股份有限公司 | Quick cooling piston mould |
| CN114367638A (en) * | 2021-11-19 | 2022-04-19 | 山东双港活塞股份有限公司 | Cooling method for rapidly cooling piston mold |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856653A (en) * | 2017-06-29 | 2018-11-23 | 西安康博新材料科技有限公司 | A kind of high-power engine piston prepares mold and piston preparation method |
| CN112247117A (en) * | 2020-07-24 | 2021-01-22 | 南平华田机械工业有限公司 | Mould assembly for greatly improving casting yield of aluminum piston blank of heavy diesel engine |
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| CN113000813A (en) * | 2021-02-23 | 2021-06-22 | 广州和德轻量化成型技术有限公司 | Die and method for producing aluminum alloy composite piston by indirect extrusion casting process |
| CN114346219A (en) * | 2021-11-19 | 2022-04-15 | 山东双港活塞股份有限公司 | Quick cooling piston mould |
| CN114367638A (en) * | 2021-11-19 | 2022-04-19 | 山东双港活塞股份有限公司 | Cooling method for rapidly cooling piston mold |
| CN114346219B (en) * | 2021-11-19 | 2024-01-23 | 山东双港活塞股份有限公司 | Quick cooling piston die |
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Effective date of registration: 20180323 Address after: 256602 Bohai Road, Shandong, No. twenty-one, No. 569, Binzhou Applicant after: BINZHOU BOHAI PISTON Co.,Ltd. Address before: 256602 Bohai Road, Shandong, No. twenty-one, No. 569, Binzhou Applicant before: SHANDONG BINZHOU BOHAI PISTON Co.,Ltd. |
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Denomination of invention: A High Pressure Casting Head Prefabrication Reinforced Piston Mold Granted publication date: 20180511 Pledgee: Binzhou branch of China CITIC Bank Co.,Ltd. Pledgor: BINZHOU BOHAI PISTON Co.,Ltd. Registration number: Y2024980014544 |
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