CN105772632A - Quadruple valve body casting and mold thereof - Google Patents
Quadruple valve body casting and mold thereof Download PDFInfo
- Publication number
- CN105772632A CN105772632A CN201610257549.8A CN201610257549A CN105772632A CN 105772632 A CN105772632 A CN 105772632A CN 201610257549 A CN201610257549 A CN 201610257549A CN 105772632 A CN105772632 A CN 105772632A
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- CN
- China
- Prior art keywords
- cavity
- valve body
- runner
- longitudinal runner
- longitudinal
- 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.)
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Classifications
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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
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a quadruple valve body casting. The quadruple valve body casting comprises a valve body, a transverse runner, longitudinal runners and a runner port. The valve body is in a cuboid shape. The longitudinal runners comprise the first longitudinal runners and the second longitudinal runners which are all of pipe-shaped structures. Cavity bodies are perpendicularly arranged on the second longitudinal runners, and the lower end of each cavity body is an opening. The invention further discloses a mold of the quadruple valve body casting. The mold comprises a shell mold body and a sand core. The sand core is assembled and formed by a main sand core body and a plurality of small sand core bodies. The main sand core body is formed by assembling a plurality of sand core bodies. Graphite arbors are placed in the main sand core body. Exhaust holes are formed in the two ends of the main sand core body and communicate with small sand core holes and main sand core holes. According to the quadruple valve body casting, the interiors of the runners are smooth, the runners in the casting are free of fash, and the sand core bodies are free of cracks; and the poured casting is smooth in appearance and free of pore defects, and the qualified rate of the casting reaches 95% or above.
Description
Technical field
The present invention relates to valve body moulding field, particularly relate to a kind of quadruple valve valve body moulding and mould thereof.
Background technology
Banked direction control valves product is mainly used in the supporting of all kinds of hydraulic pump, is widely used in all kinds of machinery hydraulic system.Levels is suitable both at home and abroad at present, and external product Heterosis is in wear-resisting long service life.Current domestic similar casting accuracy is poor, with low content of technology, the domestic long-term dependence on import of high-end hydraulic component.
There is casting difficult problem in current multi-way valve body foundry goods, valve inner runner design has to comply with design needs, also can be good at casting successfully always, main aperture fracture during casting, main aperture bends, and linearity is more than problems such as 0.6mm, the side opening breaking strains near cast gate.
Valve body moulding produces and in the technical support of research and development at valve, and state's inner valve ratio is external relatively backward, and a lot of products has been achieved with breakthrough in technology and innovation.In import high-pressure multi-path valve product, quadruple valve valve body and 5-linked valve body are made up of numerous curved surface due to surface, and wall ratio is relatively thin, manufacture difficulty is big, reason is in that the die cavity manufacturing foundry goods is complicated, sand mold mould difficulty of processing is big, and the manufacturing technology for the thin product of this wall does not also make substantial breakthroughs always.The development of domestic valve industry should move ahead toward the direction of high-end modern, in the casting technique of current valve body moulding, core easily ftractures, in casting process, temperature is low, it is easily caused foundry goods and gas hole defect occurs, the valve casting finished products Density inhomogeneity made, and it is limited to be easily generated crack, range of application.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of tensile strength quadruple valve valve body moulding high, imperforate and mould thereof.
The present invention is achieved by the following technical solutions:
nullA kind of quadruple valve valve body moulding，Including valve body、Transverse flow channels、Longitudinal runner and runner mouth，Described valve body is rectangular-shaped，Described longitudinal runner includes first longitudinal runner and second longitudinal runner，Described first longitudinal runner is tubular structure with described second longitudinal runner，Cavity is vertically installed in above described second longitudinal runner，The lower end of described cavity is opening，Described cavity includes the first cavity、Second cavity and the 3rd cavity，Described first cavity is formed along the straight line lateral connection at place, the center of circle, bottom surface by the identical cylinder of four sizes，Described second cavity is formed by connecting by six cylinders，On described second cavity, the center of circle, six cylindrical bottom surfaces is connected L-shaped，Described 3rd cavity is cylindrical，The two ends up and down of described first longitudinal runner are by transverse flow channels UNICOM，Described transverse flow channels and described 3rd cavity UNICOM.
The upper end of described first cavity is closed, three the cylinder upper ends constituting L-shaped minor face in described second cavity are followed successively by second road junction, the 3rd runner mouth and the 4th runner mouth, described 3rd cavity upper end is first-class road junction, and described first longitudinal runner left side is provided with the 5th runner mouth.
The cross sectional radius of the cross sectional radius at described first-class road junction, the cross sectional radius at second road junction and the 4th runner mouth is identical, and the cross sectional radius at described first-class road junction is more than the cross sectional radius of described 3rd runner mouth.
Described first longitudinal runner is four with described second longitudinal runner.
Described first longitudinal runner be arranged in parallel up and down with described second longitudinal runner.
The cross section of described first longitudinal runner and the cross section of described second longitudinal runner are all circular, and the center of circle is located on the same line.
Being provided with auxiliary flow between described first longitudinal runner, described auxiliary flow is spherical.
Two longitudinal runners in the middle of described first longitudinal runner are by the second auxiliary flow UNICOM, and described second auxiliary flow is arranged at the centre position of described first longitudinal runner.
Longitudinal runner of described first longitudinal runner both sides is respectively through the first auxiliary flow and the 3rd auxiliary flow UNICOM.
Described first auxiliary flow and described 3rd auxiliary flow are located on the same line, and described first auxiliary flow is arranged at below described second auxiliary flow.
The invention also discloses a kind of quadruple valve valve body moulding mould, including shell mould and core, die cavity is formed after described shell mould and described core matched moulds, described core is by main core and some little assembly of sand core molding, described main core is formed by multiple assembly of sand cores, placing graphite arbor in described main core, described main core two is provided with steam vent, little core apertures described in described steam vent UNICOM and described main core apertures, the upper end of described shell mould is provided with cup and rising head, the bottom of described rising head is connected with the upper end of described die cavity, described cast gate is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity.
The invention has the beneficial effects as follows:
(1) the casting die core interface of the present invention is many, placing graphite arbor in main core, the quadruple valve valve body moulding runner interior smooth obtained, and foundry goods inner flow passage is without fash, and core is without cracking；
(2) present invention is by the little core apertures of steam vent UNICOM and main core apertures, and solving main core cannot the problem of aerofluxus；
(3) the core smooth gas discharge of the present invention, the foundry goods smooth in appearance watered out, pore-free defect, tensile strength is big, and the percentage of A-class goods of foundry goods reaches more than 95%.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the quadruple valve valve body moulding structural representation of the present invention；
Fig. 2 is the quadruple valve valve body moulding front view of the present invention；
Fig. 3 is the quadruple valve valve body moulding A1 direction sectional view of the present invention；
Fig. 4 is the quadruple valve valve body moulding A2 direction sectional view of the present invention；
Fig. 5 is the quadruple valve valve body moulding A3 direction sectional view of the present invention；
Fig. 6 is the quadruple valve valve body moulding C-C direction sectional view of the present invention.
Wherein, in figure, accompanying drawing labelling corresponds to: 1-valve body, the longitudinal runner of 2-first, 3-cavity, 31-the first cavity, 32-the second cavity, 33-the 3rd cavity, 4-runner mouth, the first-class road junction of 41-, 42-second road junction, 43-the 3rd runner mouth, 44-the 4th runner mouth, 45-the 5th runner mouth, the longitudinal runner of 5-second, 6-transverse flow channels, 7-auxiliary flow, 71-the first auxiliary flow, 72-the second auxiliary flow, 73-the 3rd auxiliary flow.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
Embodiment 1:
Refer to Fig. 1-6.nullAs shown in figures 1 to 6，The invention discloses a kind of quadruple valve valve body moulding，Including valve body 1、Transverse flow channels 6、Longitudinal runner and runner mouth 4，Described valve body 1 is in rectangular-shaped，Described longitudinal runner includes the first longitudinal runner 2 and second longitudinal runner 5，Described first longitudinal runner 2 is tubular structure with described second longitudinal runner 5，Cavity 3 is vertically installed in above described second longitudinal runner 5，The lower end of described cavity 3 is opening，Described cavity 3 includes the first cavity 31、Second cavity 32 and the 3rd cavity 33，Described first cavity 31 is formed along the straight line lateral connection at place, the center of circle, bottom surface by the identical cylinder of four sizes，Described second cavity 32 is formed by connecting by six cylinders，On described second cavity 32, the center of circle, six cylindrical bottom surfaces is connected L-shaped，Described 3rd cavity 33 is cylindrical，The two ends up and down of described first longitudinal runner 2 are by transverse flow channels 6 UNICOM，Described transverse flow channels 6 and described 3rd cavity 33 UNICOM.
The upper end of described first cavity 31 is closed, three the cylinder upper ends constituting L-shaped minor face in described second cavity 32 are followed successively by second road junction the 42, the 3rd runner mouth 43 and the 4th runner mouth 44, described 3rd cavity 33 upper end is first-class road junction 41, and described first longitudinal runner 2 left side is provided with the 5th runner mouth 45.
The cross sectional radius of the cross sectional radius at described first-class road junction 41, the cross sectional radius at second road junction 42 and the 4th runner mouth 44 is identical, and the cross sectional radius at described first-class road junction 41 is more than the cross sectional radius of described 3rd runner mouth 43.
Described first longitudinal runner 2 is four with described second longitudinal runner 5.
Described first longitudinal runner 2 be arranged in parallel with described second longitudinal runner about 5.
The cross section of described first longitudinal runner 2 and the cross section of described second longitudinal runner 5 are all circular, and the center of circle is located on the same line.
Being provided with auxiliary flow 7 between described first longitudinal runner 2, described auxiliary flow 7 is spherical.
Two longitudinal runners in the middle of described first longitudinal runner 2 are by the second auxiliary flow 72 UNICOM, and described second auxiliary flow 72 is arranged at the centre position of described first longitudinal runner 2.
Longitudinal runner of described first longitudinal runner 2 both sides is respectively through the first auxiliary flow 71 and the 3rd auxiliary flow 73 UNICOM.
Described first auxiliary flow 71 is located on the same line with described 3rd auxiliary flow 73, and described first auxiliary flow 71 is arranged at below described second auxiliary flow 72.
The invention also discloses a kind of quadruple valve valve body moulding mould, including shell mould and core, die cavity is formed after described shell mould and described core matched moulds, described core is by main core and some little assembly of sand core molding, described main core is formed by multiple assembly of sand cores, placing graphite arbor in described main core, described main core two is provided with steam vent, little core apertures described in described steam vent UNICOM and described main core apertures, the upper end of described shell mould is provided with cup and rising head, the bottom of described rising head is connected with the upper end of described die cavity, described cast gate is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity.
The quadruple valve valve body moulding tensile strength of the present invention is more than 300MPa, and hardness is HB200-230, and cast-internal is without shrinkage cavity shrinkage porosity phenomenon, and foundry goods inner flow passage is without fash, and the percentage of A-class goods of foundry goods reaches more than 95%.
The invention has the beneficial effects as follows:
(1) the casting die core interface of the present invention is many, placing graphite arbor in main core, the quadruple valve valve body moulding runner interior smooth obtained, and foundry goods inner flow passage is without fash, and core is without cracking；
(2) present invention is by the little core apertures of steam vent UNICOM and main core apertures, and solving main core cannot the problem of aerofluxus；
(3) the core smooth gas discharge of the present invention, the foundry goods smooth in appearance watered out, pore-free defect, tensile strength is big, and the percentage of A-class goods of foundry goods reaches more than 95%.
The above is the preferred embodiment of the present invention; it it is noted that for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
- null1. a quadruple valve valve body moulding，Including valve body (1)、Transverse flow channels (6)、Longitudinal runner and runner mouth (4)，It is characterized in that，Described valve body (1) is in rectangular-shaped，Described longitudinal runner includes first longitudinal runner (2) and second longitudinal runner (5)，Described first longitudinal runner (2) is tubular structure with described second longitudinal runner (5)，Cavity (3) is vertically installed in described second longitudinal runner (5) top，The lower end of described cavity (3) is opening，Described cavity (3) includes the first cavity (31)、Second cavity (32) and the 3rd cavity (33)，Described first cavity (31) is formed along the straight line lateral connection at place, the center of circle, bottom surface by the identical cylinder of four sizes，Described second cavity (32) is formed by connecting by six cylinders，The center of circle, described second cavity (32) upper six cylindrical bottom surfaces is connected L-shaped，Described 3rd cavity (33) is cylindrical，The two ends up and down of described first longitudinal runner (2) are by transverse flow channels (6) UNICOM，Described transverse flow channels (6) and described 3rd cavity (33) UNICOM.
- 2. a kind of quadruple valve valve body moulding according to claim 1, it is characterized in that, the upper end of described first cavity (31) is closed, three the cylinder upper ends constituting L-shaped minor face in described second cavity (32) are followed successively by second road junction (42), the 3rd runner mouth (43) and the 4th runner mouth (44), described 3rd cavity (33) upper end is first-class road junction (41), and described first longitudinal runner (2) left side is provided with the 5th runner mouth (45).
- 3. a kind of quadruple valve valve body moulding according to claim 2, it is characterized in that, the cross sectional radius of the cross sectional radius of described first-class road junction (41), the cross sectional radius of second road junction (42) and the 4th runner mouth (44) is identical, and the cross sectional radius of described first-class road junction (41) is more than the cross sectional radius of described 3rd runner mouth (43).
- 4. a kind of quadruple valve valve body moulding according to claim 1, it is characterized in that, described first longitudinal runner (2) is four with described second longitudinal runner (5), and described first longitudinal runner (2) be arranged in parallel up and down with described second longitudinal runner (5).
- 5. a kind of quadruple valve valve body moulding according to claim 4, it is characterised in that the cross section of described first longitudinal runner (2) and the cross section of described second longitudinal runner (5) are all circular, and the center of circle is located on the same line.
- 6. a kind of quadruple valve valve body moulding according to claim 1 or 5, it is characterised in that being provided with auxiliary flow (7) between described first longitudinal runner (2), described auxiliary flow (7) is for spherical.
- 7. a kind of quadruple valve valve body moulding according to claim 6, it is characterized in that, two longitudinal runners in the middle of described first longitudinal runner (2) are by the second auxiliary flow (72) UNICOM, and described second auxiliary flow (72) is arranged at the centre position of described first longitudinal runner (2).
- 8. a kind of quadruple valve valve body moulding according to claim 7, it is characterised in that longitudinal runner of described first longitudinal runner (2) both sides is respectively through the first auxiliary flow (71) and the 3rd auxiliary flow (73) UNICOM.
- 9. a kind of quadruple valve valve body moulding according to claim 8, it is characterized in that, described first auxiliary flow (71) and described 3rd auxiliary flow (73) are located on the same line, and described first auxiliary flow (71) is arranged at described second auxiliary flow (72) lower section.
- 10. a quadruple valve valve body moulding mould, including shell mould and core, die cavity is formed after described shell mould and described core matched moulds, described core is by main core and some little assembly of sand core molding, described main core is formed by multiple assembly of sand cores, placing graphite arbor in described main core, described main core two is provided with steam vent, little core apertures described in described steam vent UNICOM and described main core apertures, the upper end of described shell mould is provided with cup and rising head, the bottom of described rising head is connected with the upper end of described die cavity, described cast gate is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257549.8A CN105772632B (en) | 2016-04-22 | 2016-04-22 | A kind of quadruple valve valve body moulding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257549.8A CN105772632B (en) | 2016-04-22 | 2016-04-22 | A kind of quadruple valve valve body moulding |
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| CN105772632A true CN105772632A (en) | 2016-07-20 |
| CN105772632B CN105772632B (en) | 2017-08-04 |
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| CN201610257549.8A Active CN105772632B (en) | 2016-04-22 | 2016-04-22 | A kind of quadruple valve valve body moulding |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952945A (en) * | 2016-07-22 | 2016-09-21 | 南通华东油压科技有限公司 | Flash-free valve body casting |
| CN107042290A (en) * | 2017-06-12 | 2017-08-15 | 南通华东油压科技有限公司 | A kind of integral multitandem valve casting and its casting technique |
| CN107052265A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of valve body of monoblock type three and its casting technique |
| CN107081408A (en) * | 2017-06-12 | 2017-08-22 | 南通华东油压科技有限公司 | A kind of monoblock type valve body moulding and its technique |
| CN107218426A (en) * | 2017-06-12 | 2017-09-29 | 南通华东油压科技有限公司 | A kind of pilot valve casting and its casting technique |
| WO2018039819A1 (en) * | 2016-08-27 | 2018-03-08 | 丁先华 | Quadruple valve body casting and mould therefor |
| CN108405803A (en) * | 2018-05-04 | 2018-08-17 | 南通华东油压科技有限公司 | 78A0406M valve bodies and its processing technology |
| CN108555250A (en) * | 2018-05-04 | 2018-09-21 | 南通华东油压科技有限公司 | CN21100018 valve bodies and its processing technology |
| CN108730587A (en) * | 2018-06-19 | 2018-11-02 | 如皋岩达机械工业有限公司 | A kind of quadruple valve valve body moulding and its mold |
| CN109317627A (en) * | 2018-10-31 | 2019-02-12 | 江苏泰普电力设备有限公司 | A kind of multiway valve casting molding die |
| CN109604528A (en) * | 2018-12-27 | 2019-04-12 | 天津市航宇嘉瑞科技股份有限公司 | A kind of big valve body moulding assembling sand core for rail traffic |
| CN110576155A (en) * | 2019-09-10 | 2019-12-17 | 南通华东油压科技有限公司 | Multi-way valve casting and casting method thereof |
| CN110576154A (en) * | 2019-09-10 | 2019-12-17 | 南通华东油压科技有限公司 | Cushion valve casting and casting die thereof |
| CN110877093A (en) * | 2019-09-06 | 2020-03-13 | 江苏力源金河铸造有限公司 | Core box for manufacturing hydraulic pump component sand core |
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Cited By (22)
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|---|---|---|---|---|
| CN105952945A (en) * | 2016-07-22 | 2016-09-21 | 南通华东油压科技有限公司 | Flash-free valve body casting |
| CN105952945B (en) * | 2016-07-22 | 2018-09-14 | 南通华东油压科技有限公司 | A kind of no fash valve body moulding |
| WO2018039819A1 (en) * | 2016-08-27 | 2018-03-08 | 丁先华 | Quadruple valve body casting and mould therefor |
| CN107042290A (en) * | 2017-06-12 | 2017-08-15 | 南通华东油压科技有限公司 | A kind of integral multitandem valve casting and its casting technique |
| CN107052265A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of valve body of monoblock type three and its casting technique |
| CN107081408A (en) * | 2017-06-12 | 2017-08-22 | 南通华东油压科技有限公司 | A kind of monoblock type valve body moulding and its technique |
| CN107218426A (en) * | 2017-06-12 | 2017-09-29 | 南通华东油压科技有限公司 | A kind of pilot valve casting and its casting technique |
| CN107218426B (en) * | 2017-06-12 | 2023-09-22 | 南通华东油压科技有限公司 | Pilot valve casting and casting process thereof |
| CN108555250B (en) * | 2018-05-04 | 2023-05-05 | 南通华东油压科技有限公司 | Valve body |
| CN108405803B (en) * | 2018-05-04 | 2023-05-12 | 南通华东油压科技有限公司 | Valve body and processing technology thereof |
| CN108405803A (en) * | 2018-05-04 | 2018-08-17 | 南通华东油压科技有限公司 | 78A0406M valve bodies and its processing technology |
| CN108555250A (en) * | 2018-05-04 | 2018-09-21 | 南通华东油压科技有限公司 | CN21100018 valve bodies and its processing technology |
| CN108730587A (en) * | 2018-06-19 | 2018-11-02 | 如皋岩达机械工业有限公司 | A kind of quadruple valve valve body moulding and its mold |
| CN109317627A (en) * | 2018-10-31 | 2019-02-12 | 江苏泰普电力设备有限公司 | A kind of multiway valve casting molding die |
| CN109604528A (en) * | 2018-12-27 | 2019-04-12 | 天津市航宇嘉瑞科技股份有限公司 | A kind of big valve body moulding assembling sand core for rail traffic |
| CN109604528B (en) * | 2018-12-27 | 2024-04-05 | 天津市航宇嘉瑞科技股份有限公司 | Big valve body casting assembly sand core for rail transit |
| CN110877093B (en) * | 2019-09-06 | 2024-03-26 | 江苏力源金河铸造有限公司 | Core box for manufacturing sand core of hydraulic pump component |
| CN110877093A (en) * | 2019-09-06 | 2020-03-13 | 江苏力源金河铸造有限公司 | Core box for manufacturing hydraulic pump component sand core |
| CN110576154A (en) * | 2019-09-10 | 2019-12-17 | 南通华东油压科技有限公司 | Cushion valve casting and casting die thereof |
| CN110576155B (en) * | 2019-09-10 | 2024-04-05 | 南通华东油压科技有限公司 | Multiway valve casting and casting method thereof |
| CN110576154B (en) * | 2019-09-10 | 2024-04-05 | 南通华东油压科技有限公司 | Cushion valve casting |
| CN110576155A (en) * | 2019-09-10 | 2019-12-17 | 南通华东油压科技有限公司 | Multi-way valve casting and casting method thereof |
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|---|---|
| CN105772632B (en) | 2017-08-04 |
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Effective date of registration: 20180716 Address after: 226511 37 Pu Tang Road, Bai Pu town, Rugao City, Nantong, Jiangsu Patentee after: Nantong En Mai precision optical machinery Science and Technology Ltd. Address before: 226000 18 Deng Yang Road, BAPU Town, Rugao City, Nantong, Jiangsu Patentee before: Nantong Huadong Hydraulic Technology Co.,Ltd. |