CN107234213A - The ceramic precision casting method of the high pressure stainless steel pump housing - Google Patents
The ceramic precision casting method of the high pressure stainless steel pump housing Download PDFInfo
- Publication number
- CN107234213A CN107234213A CN201710611102.0A CN201710611102A CN107234213A CN 107234213 A CN107234213 A CN 107234213A CN 201710611102 A CN201710611102 A CN 201710611102A CN 107234213 A CN107234213 A CN 107234213A
- Authority
- CN
- China
- Prior art keywords
- ceramic
- stainless steel
- pump housing
- high pressure
- casting method
- 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
-
- 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
-
- 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
-
- 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 ceramic precision casting method of the high pressure stainless steel pump housing, comprise the following steps：The ceramic slurry mixed up in advance is poured into sandbox；Upper surface is struck off, gum deposit is cooled down after 5 15min after grouting, molding when ceramic layer disappears flexible, first taken out running gate system, venting pin during molding, it is then vertical to take out master mold.By the above-mentioned means, present invention process is simple, the manufacturing cycle is short, and cost is low, and casting accuracy is high.
Description
Technical field
The present invention relates to valve body processing technique field, the ceramic mould precision casting of more particularly to a kind of high pressure stainless steel pump housing
Make method.
Background technology
In traditional hot investment casting production process, mainly using precision-investment casting method, silicic acid is also utilized
Ceramic shell is made by direct grouting method as binding agent in ethyl ester.In the technique using precision-investment casting, due to
Manufacturing process is complicated, and the production cycle is long, and manufacturing cost is high, and the percent defective of ceramic shell is higher so limit its application,
In the production process for being mostly used for the casting of the high added values such as steel alloy, the production process of carbon steel and non-ferrous metal is rarely used in
In.In the technique by the use of silester as binding agent by direct grouting method ceramic shell is made, due to manufacture work
Skill is also very complicated, can use harmful substance during silicate hydrolyzate, not meet current environmentally friendly requirement, and
The technique productions cycle is also longer, and manufacturing cost is high, and the percent defective of shell is higher so its application is also restrained.
The content of the invention
The present invention solves the technical problem of：Technique is simple, and the manufacturing cycle is short, and cost is low, and casting accuracy is high.
In order to solve the above technical problems, one aspect of the present invention is：A kind of high pressure stainless steel pump housing is provided
Ceramic precision casting method, comprise the following steps：The ceramic slurry mixed up in advance is poured into sandbox；Upper surface is struck off,
After grouting after gum deposit cooling 5-15min, molding when ceramic layer disappears flexible first takes out running gate system, venting pin during molding,
Then it is vertical to take out master mold；Blowing compressed air of fighting should be put after molding at once and carries out torch firing, and the surface of ceramic mould is had necessarily
Intensity and hardness；After fire extinguishes, high temperature kiln roasting is moved into, 350-550 DEG C of sintering temperature, roasting time 2-3h comes out of the stove
Temperature should make ethanol remaining in ceramic mould, moisture and a small amount of organic matter burning-off at 250 DEG C, needed for ceramic mould valve
Body.
In a preferred embodiment of the present invention, the ceramic slurry is schmigel, bores emery dust or carborundum.
In a preferred embodiment of the present invention, the case hardness of the ceramic mould is 85-90HR.
In a preferred embodiment of the present invention, the surface strength of the ceramic mould is 70-80 N/m2.
The beneficial effects of the invention are as follows：Technique is simple, and the manufacturing cycle is short, and cost is low, and casting accuracy is high.
Embodiment
It is described in detail with reference to presently preferred embodiments of the present invention, so that advantages and features of the invention can be more easy to
In being readily appreciated by one skilled in the art, apparent clearly defined so as to be made to protection scope of the present invention.
Embodiment one
A kind of ceramic precision casting method of the high pressure stainless steel pump housing, comprises the following steps：By the ceramic slurry mixed up in advance
Pour into sandbox；Upper surface is struck off, after grouting after gum deposit cooling 5-15min, molding when ceramic layer disappears flexible is first during molding
Running gate system, venting pin are taken out, it is then vertical to take out master mold；Blowing compressed air of fighting should be put after molding at once and carries out torch firing,
And the surface of ceramic mould is had certain intensity and hardness；After fire extinguishes, high temperature kiln roasting, sintering temperature 350- are moved into
550 DEG C, roasting time 2-3h, tapping temperature should make ethanol remaining in ceramic mould, moisture and a small amount of organic matter at 250 DEG C
Burning-off, needed for ceramic mould valve body.
Further illustrate, the ceramic slurry is schmigel, bores emery dust or carborundum, and the case hardness of the ceramic mould is
85-90HR, the surface strength of the ceramic mould is 70-80 N/m2.
The general principle of ceramic mold casting mould is：Using the small refractory material of refractoriness height, thermal coefficient of expansion as aggregate, use
The ceramic mould slurry that silester by hydrolysis is configured as binding agent is in the presence of catalyst, by grouting, knot
The high ceramic-mould of surface smoothness, dimensional accuracy, this casting is made in the series of processes such as glue, hardening, molding, torch firing and roasting
Type is divided into two major classes by different forming methods again；All ceramic monolithic deviceses and the composite ceramic mould covered the bottom of with.Based on
In the ceramic mold casting formative technology of rapid prototyping technology, it is contemplated that cost factor, the composite ceramic mould covered the bottom of with is at present should
With a kind of widest technique.Because ceramic mould has a good replicability, thus rapid prototyping surface quality by direct shadow
The surface quality to ceramic mould is rung, and then influences the surface smoothness of casting.The casting of SLA prototypes production has minimum upper table
Surface roughness, and the working face of mould is usually the upper surface of mould, so during cast metal mould tool, using SL technique productions
RP prototypes are optimal selections.There is step effect on inclined-plane and vertical plane using the prototype of SL technique productions, roughness is larger, must
The inclined-plane and vertical plane of RP prototypes must be surface-treated.Using methods such as polishing, Puttying, reach certain bright and clean
Degree.The quality of ceramic mould directly affects the quality of casting, should possess following performance：1) gas permeability type：High-temperature liquid metal pours into casting
After type, a large amount of gases are full of in type, these gases must smoothly be discharged in casting mold, molding sand is this to allow the property of gas permeation
Gas permeability can be referred to as；2) intensity：The ability of molding sand resistance external force destruction is referred to as intensity.Molding sand must possess sufficiently high intensity
It could not cause during moulding, carrying, mould assembling and collapse, mo(U)ld face will not be also destroyed during cast.The intensity of molding sand is not yet
It is preferably too high, otherwise because of the decline of gas permeability, deformability casting can be made to produce defect.3) fire resistance：The metal liquid of high temperature is poured
Strong heat effect is produced after entering to casting mold, therefore molding sand will have the ability of resistance thermal effect at high temperature to be fire resistance.Such as moulding
The fire resistance of material is poor, and casting is also easy to produce scab.SiO2 contents are more in molding sand, and molding sand particle is bigger, and fire resistance is better.4)
Plasticity：Finger-type sand is deformed under external force, and the ability of existing shape can be intactly kept after removing external force.Modeling Material
Plasticity is good, and molding operation is convenient, and the sand mold shape being made is accurate, clear-cut.5) deformability：Casting is in condensation, volume
Shrink, molding sand should have certain ability compressed, referred to as deformability.The deformability of molding sand is bad, and casting is also easy to produce
Internal stress or cracking.Molding sand gets over consolidation, and deformability is poorer.The things such as wood chip are added in molding sand can improve deformability.
Present invention is disclosed a kind of ceramic precision casting method of the high pressure stainless steel pump housing, technique is simple, the manufacturing cycle
Short, cost is low, and casting accuracy is high.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (4)
1. a kind of ceramic precision casting method of the high pressure stainless steel pump housing, it is characterised in that：Comprise the following steps：It will adjust in advance
Good ceramic slurry pours into sandbox；Upper surface is struck off, after grouting after gum deposit cooling 5-15min, when ceramic layer disappears flexible
Molding, first takes out running gate system, venting pin during molding, then vertical to take out master mold；Blow pressure contracting of fighting should be put after molding at once
Air carries out torch firing, and the surface of ceramic mould is had certain intensity and hardness；After fire extinguishes, high temperature kiln roasting is moved into,
350-550 DEG C of sintering temperature, roasting time 2-3h, tapping temperature should at 250 DEG C, make ethanol remaining in ceramic mould, moisture and
A small amount of organic matter burning-off, needed for ceramic mould valve body.
2. the ceramic precision casting method of the high pressure stainless steel pump housing according to claim 1, it is characterised in that：The pottery
Porcelain slurry is schmigel, bores emery dust or carborundum.
3. the ceramic precision casting method of the high pressure stainless steel pump housing according to claim 1, it is characterised in that：The pottery
The case hardness of porcelain type is 85-90HR.
4. the ceramic precision casting method of the high pressure stainless steel pump housing according to claim 1, it is characterised in that：The pottery
The surface strength of porcelain type is 70-80 N/m2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611102.0A CN107234213A (en) | 2017-07-25 | 2017-07-25 | The ceramic precision casting method of the high pressure stainless steel pump housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611102.0A CN107234213A (en) | 2017-07-25 | 2017-07-25 | The ceramic precision casting method of the high pressure stainless steel pump housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107234213A true CN107234213A (en) | 2017-10-10 |
Family
ID=59988106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710611102.0A Pending CN107234213A (en) | 2017-07-25 | 2017-07-25 | The ceramic precision casting method of the high pressure stainless steel pump housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107234213A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931528A (en) * | 2017-11-18 | 2018-04-20 | 蚌埠市宏大制药机械有限公司 | A kind of heat safe cermet composite casting mould |
| CN109332587A (en) * | 2018-12-11 | 2019-02-15 | 无锡斯考尔自动控制设备有限公司 | Langaloy butterfly valve body sand mold mould |
| CN112264582A (en) * | 2020-09-14 | 2021-01-26 | 乐清市和瑞恒模具科技有限公司 | Manufacturing method for ceramic mold casting |
| CN114054674A (en) * | 2021-11-23 | 2022-02-18 | 中冶陕压重工设备有限公司 | Composite sand mould manufacturing method for manufacturing high-chromium cast iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009531271A (en) * | 2006-03-28 | 2009-09-03 | ベスビウス クルーシブル カンパニー | Manufacture of ceramic molds |
| CN104148581A (en) * | 2014-08-22 | 2014-11-19 | 无锡柯马机械有限公司 | A ceramic mold casting process |
| CN105537515A (en) * | 2015-12-15 | 2016-05-04 | 含山县大力精密机械有限公司 | Casting method for pump body of water pump |
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2017
- 2017-07-25 CN CN201710611102.0A patent/CN107234213A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009531271A (en) * | 2006-03-28 | 2009-09-03 | ベスビウス クルーシブル カンパニー | Manufacture of ceramic molds |
| CN104148581A (en) * | 2014-08-22 | 2014-11-19 | 无锡柯马机械有限公司 | A ceramic mold casting process |
| CN105537515A (en) * | 2015-12-15 | 2016-05-04 | 含山县大力精密机械有限公司 | Casting method for pump body of water pump |
Non-Patent Citations (1)
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| 李建生等: "《陶瓷型铸造制模技术》", 《模具铸造》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931528A (en) * | 2017-11-18 | 2018-04-20 | 蚌埠市宏大制药机械有限公司 | A kind of heat safe cermet composite casting mould |
| CN109332587A (en) * | 2018-12-11 | 2019-02-15 | 无锡斯考尔自动控制设备有限公司 | Langaloy butterfly valve body sand mold mould |
| CN109332587B (en) * | 2018-12-11 | 2024-03-08 | 无锡斯考尔自动控制设备有限公司 | Sand mould for high nickel alloy butterfly valve body |
| CN112264582A (en) * | 2020-09-14 | 2021-01-26 | 乐清市和瑞恒模具科技有限公司 | Manufacturing method for ceramic mold casting |
| CN114054674A (en) * | 2021-11-23 | 2022-02-18 | 中冶陕压重工设备有限公司 | Composite sand mould manufacturing method for manufacturing high-chromium cast iron |
| CN114054674B (en) * | 2021-11-23 | 2023-12-12 | 中冶陕压重工设备有限公司 | Method for manufacturing composite sand mould for manufacturing high-chromium cast iron |
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Application publication date: 20171010 |