CN107716848A - A kind of casting technique of multiway valve casting - Google Patents
A kind of casting technique of multiway valve casting Download PDFInfo
- Publication number
- CN107716848A CN107716848A CN201710904785.9A CN201710904785A CN107716848A CN 107716848 A CN107716848 A CN 107716848A CN 201710904785 A CN201710904785 A CN 201710904785A CN 107716848 A CN107716848 A CN 107716848A
- Authority
- CN
- China
- Prior art keywords
- casting
- parts
- core
- multiway valve
- main core
- 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
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- 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
-
- 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
Abstract
The invention discloses a kind of casting technique of multiway valve casting.Casting technique includes Mold Making, main core and the making of small core, moulding, cast and cleaning and examined；What the main core and small core made concretely comprises the following steps：Main core and small core are made using molding sand, using Steel material as arbor；Small core and main core are fitted together by adhesive；The cast concretely comprises the following steps：The casting mold obtained after moulding is preheated, preheating temperature is 80 100 DEG C, then the inner surface spraying heat-resistant agent of casting mold after preheat, casting mold insulation is carried out to the casting mold after spraying again, holding temperature is 200 280 DEG C, and soaking time is 10 20 minutes, then injects potting syrup in die cavity.The present invention is by preheating and spraying heat-resistant agent, and casting mold has stronger retractility, is less likely to occur to rupture in casting process, meanwhile, ensure the uniform progress of cast and cooling, the casting obtained from is not allowed to be also easy to produce shrinkage cavity and porosity and internal porosity.
Description
Technical field
The present invention relates to a kind of casting technique of multiway valve casting, belong to valve body moulding technical field.
Background technology
Banked direction control valves is to combine more than two valve blocks, to manipulate the motion of multiple executive components.Because it can
According to the requirement of different hydraulic systems, various valve groups are combined, so it is compact-sized, pipeline is simple, and the pressure loss is small,
And it is easy for installation, so being widely used in engineering machinery, handling machinery and other requirements operate multiple executive component fortune
Dynamic walking machine.
Hydraulic valve is hydraulic system key components and parts, and the hydraulic pressure valve arrangement of large excavator and required precision are very high, special
It is not the valve of some Multi-oil circuits, temperature rises quickly in the course of work, and temperature is too high, the work for causing hydraulic valve to stablize,
And wear extent is big, it can reveal valve body in the presence of the pressure fluctuation of hydraulic system or impact shock, and pressure >=35Mpa
It is easier to leak under high-pressure work state, the casting problem such as hydraulic valve casting shrinkage cavity and porosity, internal porosity can be usually product
The defects of, it is desirable to higher dense internal organization and the linearity of main valve hole cast blank are less than 1.0 millimeters.
The content of the invention
For overcome the deficiencies in the prior art, the invention provides a kind of casting technique of multiway valve casting.
The present invention is achieved through the following technical solutions：
A kind of casting technique of multiway valve casting, including Mold Making, main core and the making of small core, moulding, cast and cleaning are examined；
What the main core and small core made concretely comprises the following steps：Main core and small core are made using molding sand, using Steel material as arbor；Small core
Fitted together with main core by adhesive；The cast concretely comprises the following steps：The casting mold obtained after moulding is preheated, in advance
Hot temperature is 80-100 DEG C, the then inner surface spraying heat-resistant agent of casting mold after preheat, then cast to the casting mold after spraying
Type is incubated, and holding temperature is 200-280 DEG C, and soaking time is 10-20 minutes, then injects potting syrup in die cavity.
A kind of casting technique of described multiway valve casting, the molding sand include the raw material of following parts by weight：Quartz sand
30-60 parts, white sand 20-30 parts, diatomite 2-6 parts, Ludox 10-16 parts, polyimides 4-8 parts, sldium lauryl sulfate 1-3 parts
With phenolic resin 1-3 parts.
The weight ratio of a kind of casting technique of described multiway valve casting, the quartz sand and white sand is 1.5-2:1.
A kind of casting technique of described multiway valve casting, described adhesive are waterglass.
A kind of casting technique of described multiway valve casting, the heat-resistant agent include the raw material of following parts by weight：Glass
Fiber 30-50 parts, zinc oxide 10-15 parts, nano ceramics 10-15 parts, chitosan 2-6 parts, acrylic resin 20-25 parts and poly- third
Acrylamide 2-6 parts.
A kind of casting technique of described multiway valve casting, the pouring temperature are 1400 DEG C -1450 DEG C, and the duration of pouring is
20-25s。
The beneficial effect that the present invention is reached：
The casting technique of the present invention makes main core and small core using molding sand, meanwhile, arbor is used as using Steel material, prevent main core with
Small core deformation, in cast, by preheating and spraying heat-resistant agent, casting mold has stronger retractility, not allowed in casting process
Easily rupture, meanwhile, ensure the uniform progress of cast and cooling, the casting obtained from do not allow to be also easy to produce shrinkage cavity and porosity and
Internal porosity.
The sand formulation of the present invention is reasonable, is used as main material by quartz sand and white sand, improves the precision of casting
The content of degree, Ludox and phenolic resin can guarantee that the viscosity of molding sand, while make the good permeability of molding sand, and preparation method is simple,
The moulding sand stability for preparing is good, thermal conductivity is big, easily defeated and dispersed.After testing, the green compression strength of Sand of the present invention is
0.14-0.18MPa, compact rate of molding 51-54%, air penetrability 110-120, hot green tensile strength 3-5KPa.
The present invention heat-resistant agent in using glass fibre, zinc oxide and nano ceramics as major ingredient, heat-resisting effect is good, and has
There is certain intensity, can adapt to improve the flowing of heat-resistant agent by adding chitosan, acrylic resin and polyacrylamide
Property so that heat-resistant agent is uniformly coated on casting mold inner surface.
Embodiment
Below by embodiment, the invention will be further described.Following examples are only used for clearly illustrating this hair
Bright technical scheme, and can not be limited the scope of the invention with this.
Embodiment 1
A kind of casting technique of multiway valve casting, including following steps：
（1）Mold Making：Prepare die for making core, check mould and the dirt on mould is cleaned out；
（2）Main core and small core make：Main core and small core are made using molding sand, using Steel material as arbor；Small core and main core are led to
Adhesive is crossed to fit together；
（3）Moulding：Shell mould is made using molding sand, pressed molding sand in full model by core shooter, molding sand is 80-100 DEG C in temperature
Under the conditions of be heating and curing after shaping, it is standby to obtain casting mold；
（4）Cast：The casting mold obtained after moulding is preheated, preheating temperature is 80-100 DEG C, then casting mold after preheat
Inner surface spraying heat-resistant agent, then to after spraying casting mold carry out casting mold insulation, holding temperature be 200-280 DEG C, soaking time
For 10-20 minutes, then potting syrup is injected in die cavity, the pouring temperature is 1400 DEG C -1450 DEG C, duration of pouring 20-
25s；
（5）Cleaning is examined：After natural cooling, the protrusion such as multichannel valve surface, excision cast gate, rising head, relief grinding burr and fash is cleared up
Thing, residual sand is cleared up again, you can obtain multiway valve casting.
Wherein, the molding sand includes the raw material of following parts by weight：30 parts of quartz sand, 20 parts of white sand, 6 parts of diatomite, silicon
1 part of 10 parts of colloidal sol, 4 parts of polyimides, 3 parts of sldium lauryl sulfate and phenolic resin.
Wherein, described adhesive is waterglass.
Wherein, the heat-resistant agent includes the raw material of following parts by weight：30 parts of glass fibre, zinc oxide 10 part, nanometer pottery
2 parts of 15 parts of porcelain, 2 parts of chitosan, 25 parts of acrylic resin and polyacrylamide.
Embodiment 2
A kind of casting technique of multiway valve casting, including following steps：
（1）Mold Making：Prepare die for making core, check mould and the dirt on mould is cleaned out；
（2）Main core and small core make：Main core and small core are made using molding sand, using Steel material as arbor；Small core and main core are led to
Adhesive is crossed to fit together；
（3）Moulding：Shell mould is made using molding sand, pressed molding sand in full model by core shooter, molding sand is 80-100 DEG C in temperature
Under the conditions of be heating and curing after shaping, it is standby to obtain casting mold；
（4）Cast：The casting mold obtained after moulding is preheated, preheating temperature is 80-100 DEG C, then casting mold after preheat
Inner surface spraying heat-resistant agent, then to after spraying casting mold carry out casting mold insulation, holding temperature be 200-280 DEG C, soaking time
For 10-20 minutes, then potting syrup is injected in die cavity, the pouring temperature is 1400 DEG C -1450 DEG C, duration of pouring 20-
25s；
（5）Cleaning is examined：After natural cooling, the protrusion such as multichannel valve surface, excision cast gate, rising head, relief grinding burr and fash is cleared up
Thing, residual sand is cleared up again, you can obtain multiway valve casting.
Wherein, the molding sand includes the raw material of following parts by weight：60 parts of quartz sand, 30 parts of white sand, 2 parts of diatomite, silicon
3 parts of 16 parts of colloidal sol, 8 parts of polyimides, 1 part of sldium lauryl sulfate and phenolic resin.
Wherein, the weight of the quartz sand and white sand ratio is 1.5-2:1.
Wherein, described adhesive is waterglass.
Wherein, the heat-resistant agent includes the raw material of following parts by weight：50 parts of glass fibre, zinc oxide 15 part, nanometer pottery
6 parts of 10 parts of porcelain, 6 parts of chitosan, 20 parts of acrylic resin and polyacrylamide.
Embodiment 3
A kind of casting technique of multiway valve casting, including following steps：
（1）Mold Making：Prepare die for making core, check mould and the dirt on mould is cleaned out；
（2）Main core and small core make：Main core and small core are made using molding sand, using Steel material as arbor；Small core and main core are led to
Adhesive is crossed to fit together；
（3）Moulding：Shell mould is made using molding sand, pressed molding sand in full model by core shooter, molding sand is 80-100 DEG C in temperature
Under the conditions of be heating and curing after shaping, it is standby to obtain casting mold；
（4）Cast：The casting mold obtained after moulding is preheated, preheating temperature is 80-100 DEG C, then casting mold after preheat
Inner surface spraying heat-resistant agent, then to after spraying casting mold carry out casting mold insulation, holding temperature be 200-280 DEG C, soaking time
For 10-20 minutes, then potting syrup is injected in die cavity, the pouring temperature is 1400 DEG C -1450 DEG C, duration of pouring 20-
25s；
（5）Cleaning is examined：After natural cooling, the protrusion such as multichannel valve surface, excision cast gate, rising head, relief grinding burr and fash is cleared up
Thing, residual sand is cleared up again, you can obtain multiway valve casting.
Wherein, the molding sand includes the raw material of following parts by weight：50 parts of quartz sand, 25 parts of white sand, 4 parts of diatomite, silicon
2 parts of 13 parts of colloidal sol, 5 parts of polyimides, 2 parts of sldium lauryl sulfate and phenolic resin.
Wherein, described adhesive is waterglass.
Wherein, the heat-resistant agent includes the raw material of following parts by weight：40 parts of glass fibre, zinc oxide 12 part, nanometer pottery
4 parts of 12 parts of porcelain, 5 parts of chitosan, 22 parts of acrylic resin and polyacrylamide.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of casting technique of multiway valve casting, including Mold Making, main core and the making of small core, moulding, cast and cleaning inspection
Test；It is characterized in that concretely comprising the following steps of making of the main core and small core：Main core and small core are made using molding sand, using Steel material
As arbor；Small core and main core are fitted together by adhesive；The cast concretely comprises the following steps：Casting to being obtained after moulding
Type is preheated, preheating temperature be 80-100 DEG C, then casting mold after preheat inner surface spraying heat-resistant agent, then to spraying after
Casting mold carry out casting mold insulation, holding temperature be 200-280 DEG C, soaking time is 10-20 minutes, then injects potting syrup
In die cavity.
2. a kind of casting technique of multiway valve casting according to claim 1, it is characterized in that, the molding sand includes following heavy
Measure the raw material of number：Quartz sand 30-60 parts, white sand 20-30 parts, diatomite 2-6 parts, Ludox 10-16 parts, polyimides 4-8
Part, sldium lauryl sulfate 1-3 parts and phenolic resin 1-3 parts.
3. a kind of casting technique of multiway valve casting according to claim 2, it is characterized in that, the quartz sand and white sand
Weight ratio is 1.5-2:1.
4. a kind of casting technique of multiway valve casting according to claim 1, it is characterized in that, described adhesive is water glass
Glass.
5. a kind of casting technique of multiway valve casting according to claim 1, it is characterized in that, the heat-resistant agent includes following
The raw material of parts by weight：Glass fibre 30-50 parts, zinc oxide 10-15 parts, nano ceramics 10-15 parts, chitosan 2-6 parts, propylene
Acid resin 20-25 parts and polyacrylamide 2-6 parts.
6. a kind of casting technique of multiway valve casting according to claim 1, it is characterized in that, the pouring temperature is 1400
DEG C -1450 DEG C, duration of pouring 20-25s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904785.9A CN107716848A (en) | 2017-09-29 | 2017-09-29 | A kind of casting technique of multiway valve casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904785.9A CN107716848A (en) | 2017-09-29 | 2017-09-29 | A kind of casting technique of multiway valve casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107716848A true CN107716848A (en) | 2018-02-23 |
Family
ID=61209044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710904785.9A Pending CN107716848A (en) | 2017-09-29 | 2017-09-29 | A kind of casting technique of multiway valve casting |
Country Status (1)
| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108515139A (en) * | 2018-05-11 | 2018-09-11 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method for the hot investment casting molding sand that gas permeability is good |
| WO2019061237A1 (en) * | 2017-09-29 | 2019-04-04 | 吴江市液铸液压件铸造有限公司 | Casting process for multi-way valve casting piece |
| CN111283145A (en) * | 2020-03-23 | 2020-06-16 | 苏州勤美达精密机械有限公司 | Novel core assembly process and application |
| CN113458320A (en) * | 2021-07-02 | 2021-10-01 | 南通华东油压科技有限公司 | Casting forming process of complex multi-way valve for engineering machinery |
| CN114700682A (en) * | 2020-09-09 | 2022-07-05 | 北京盛维华科技有限公司 | Hydraulic multi-way valve casting process |
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| CN103252457A (en) * | 2013-05-02 | 2013-08-21 | 江苏泰普电力设备有限公司 | 25-tonnage hydraulic multi-way valve casting process |
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| CN104874720A (en) * | 2015-05-20 | 2015-09-02 | 柳州市百田机械有限公司 | Casting molding sand |
| CN105903910A (en) * | 2016-04-22 | 2016-08-31 | 南通华东油压科技有限公司 | Monolithic multi-way valve body casting piece casting method |
| 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 |
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| CN101875090A (en) * | 2010-07-16 | 2010-11-03 | 吴江市液铸液压件铸造有限公司 | Flange casting production process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019061237A1 (en) * | 2017-09-29 | 2019-04-04 | 吴江市液铸液压件铸造有限公司 | Casting process for multi-way valve casting piece |
| CN108515139A (en) * | 2018-05-11 | 2018-09-11 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method for the hot investment casting molding sand that gas permeability is good |
| CN111283145A (en) * | 2020-03-23 | 2020-06-16 | 苏州勤美达精密机械有限公司 | Novel core assembly process and application |
| CN114700682A (en) * | 2020-09-09 | 2022-07-05 | 北京盛维华科技有限公司 | Hydraulic multi-way valve casting process |
| CN113458320A (en) * | 2021-07-02 | 2021-10-01 | 南通华东油压科技有限公司 | Casting forming process of complex multi-way valve for engineering machinery |
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Application publication date: 20180223 |