CN105880463A - Sand for precision casting and preparation process of sand for precision casting - Google Patents

Sand for precision casting and preparation process of sand for precision casting Download PDF

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Publication number
CN105880463A
CN105880463A CN201610439672.1A CN201610439672A CN105880463A CN 105880463 A CN105880463 A CN 105880463A CN 201610439672 A CN201610439672 A CN 201610439672A CN 105880463 A CN105880463 A CN 105880463A
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CN
China
Prior art keywords
parts
sand
powder
hot investment
investment casting
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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.)
Pending
Application number
CN201610439672.1A
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Chinese (zh)
Inventor
李俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Yian Precision Machinery Parts Co Ltd
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Anhui Yian Precision Machinery Parts Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Anhui Yian Precision Machinery Parts Co Ltd filed Critical Anhui Yian Precision Machinery Parts Co Ltd
Priority to CN201610439672.1A priority Critical patent/CN105880463A/en
Publication of CN105880463A publication Critical patent/CN105880463A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds

Abstract

The invention discloses sand for precision casting. The sand for precision casting is prepared from, by weight, 40-50 parts of quartz stone, 38-45 parts of mullite, 15-18 parts of corundum, 6-10 parts of manganese dioxide, 9-14 parts of magnesium oxide, 5-12 parts of aluminum oxide, 6-9 parts of silicon carbide, 10-16 parts of zirconite, 10-15 parts of grog refractory, 5-8 parts of a binding agent and 9-12 parts of a dispersing agent. Compared with the prior art, a preparation method has advantages that the method is simple, convenient and reasonable in process; the prepared sand for precision casting is high in thermal conductivity and refractoriness; by grinding of raw materials into fine particles, casting quality can be improved beneficially, air permeability is improved, the defect of blow holes is reduced, and yield is increased; in addition, the sand for precision casting is high in collapsibility after casting, so that demoulding is facilitated.

Description

A kind of hot investment casting sand and preparation technology thereof
Technical field
The present invention relates to foundry sand technical field, be specifically related to a kind of hot investment casting sand and Preparation technology.
Background technology
In casting technique, metropolis first selects suitable mold material, and (general casting model powder accounts for More than 70%) cast again after carrying out mold, therefore, casting model powder select to casting for the most very Key, particularly hot investment casting.General casting require casting model powder intensity high, heat-resist, Fine powder is few, acid resistance good, hot investment casting also require after casting model powder easy-formation and molding intensity high, Water content is low, molded surface roughness is low, not scab in casting process, collapsibility after casting Good.Sand surface roughness spherical in shape is low, collapsibility good but shaping strength is low, and acute angle type is then Shaping strength is high, roughness is high, collapsibility is poor, how to obtain various aspects of performance the most excellent Casting model powder is a difficult point.
Summary of the invention
It is desirable to provide a kind of hot investment casting sand and preparation technology thereof.
The present invention provides following technical scheme:
A kind of hot investment casting sand, it is made up of the raw material of following parts by weight: quartz 40-50 part, mullite 38-45 part, corundum 15-18 part, manganese dioxide 6-10 part, oxygen Change magnesium 9-14 part, aluminium sesquioxide 5-12 part, carborundum 6-9 part, zircon 10-16 part, Grog refractory 10-15 part, bonding agent 5-8 part, dispersant 9-12 part.
A kind of hot investment casting sand and preparation technology thereof, comprise the following steps:
(1) quartz of described parts by weight, mullite, zircon, corundum are weighed respectively It is broken into the fragment less than 10mm, then grinds to form thin more than 99% of 320 mesh percent of pass respectively Powder, by the fine powder sieving obtained, blow clearly after be uniformly mixed to get mixed powder;
(2) manganese dioxide of described parts by weight, magnesium oxide, aluminium sesquioxide, carbon are weighed SiClx uses nebulization to prepare fine sand in the molten state;
(3) mixed powder step (1) obtained is sent into comminutor and is carried out pelletize, adds after screening Entering the fine sand continuation pelletize that step (2) obtains, becoming until obtaining ganoid casting model powder half Product;
(4) add in casting model powder semi-finished product the grog refractory of described parts by weight, bonding agent, Dispersant, after mix homogeneously, stirs 15-20min, then is dried, obtain dry semi-finished product;
(5) the dry semi-finished product in step (4) are sintered at 1350-1420 DEG C 1-2h, Obtain hot investment casting sand.
Described bonding agent is in phenolic resin, waterglass, vegetable oil, tower oil, polyvinyl alcohol One or more mixture.
In described dispersant peo resin, gelatin, sodium lignin sulfonate, Tissuemat E One or more mixture.
Described grog refractory be mass ratio be bauxite and the gangue mixture of 3: 2.
Compared with prior art, the invention has the beneficial effects as follows: preparation method of the present invention simplicity, Rational technology, the hot investment casting sand heat conductivity prepared is good, and refractoriness is high, and leads to Cross raw mill and become fine grained, be conducive to improving mold quality, add breathability, reduce Bleb defect, adds yield rate, and the present invention obtains hot investment casting sand and casts simultaneously Rear collapsibility is good, conveniently stripped.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, it is fully described by, 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, those of ordinary skill in the art The every other embodiment obtained under not making creative work premise, broadly falls into this The scope of bright protection.
1 one kinds of hot investment casting sand of embodiment, it is made up of the raw material of following parts by weight: quartz 40 parts of stone, mullite 38 parts, 15 parts of corundum, manganese dioxide 6 parts, magnesium oxide 9 parts, Aluminium sesquioxide 5 parts, carborundum 6 parts, zircon 10 parts, grog refractory 10 parts, bonding Agent 5 parts, dispersant 9 parts.
A kind of hot investment casting sand and preparation technology thereof, comprise the following steps:
(1) quartz of described parts by weight, mullite, zircon, corundum are weighed respectively It is broken into the fragment less than 10mm, then grinds to form thin more than 99% of 320 mesh percent of pass respectively Powder, by the fine powder sieving obtained, blow clearly after be uniformly mixed to get mixed powder;
(2) manganese dioxide of described parts by weight, magnesium oxide, aluminium sesquioxide, carbon are weighed SiClx uses nebulization to prepare fine sand in the molten state;
(3) mixed powder step (1) obtained is sent into comminutor and is carried out pelletize, adds after screening Entering the fine sand continuation pelletize that step (2) obtains, becoming until obtaining ganoid casting model powder half Product;
(4) add in casting model powder semi-finished product the grog refractory of described parts by weight, bonding agent, Dispersant, after mix homogeneously, stirs 15-20min, then is dried, obtain dry semi-finished product;
(5) the dry semi-finished product in step (4) are sintered at 1350-1420 DEG C 1-2h, Obtain hot investment casting sand.
Described bonding agent is in phenolic resin, waterglass, vegetable oil, tower oil, polyvinyl alcohol One or more mixture.
In described dispersant peo resin, gelatin, sodium lignin sulfonate, Tissuemat E One or more mixture.
Described grog refractory be mass ratio be bauxite and the gangue mixture of 3: 2.
2 one kinds of hot investment casting sand of embodiment, it is made up of the raw material of following parts by weight: quartz 50 parts of stone, mullite 45 parts, 18 parts of corundum, manganese dioxide 10 parts, magnesium oxide 14 parts, Aluminium sesquioxide 12 parts, carborundum 9 parts, zircon 16 parts, grog refractory 15 parts, viscous Connect agent 8 parts, dispersant 12 parts.
A kind of hot investment casting sand and preparation technology thereof, comprise the following steps:
(1) quartz of described parts by weight, mullite, zircon, corundum are weighed respectively It is broken into the fragment less than 10mm, then grinds to form thin more than 99% of 320 mesh percent of pass respectively Powder, by the fine powder sieving obtained, blow clearly after be uniformly mixed to get mixed powder;
(2) manganese dioxide of described parts by weight, magnesium oxide, aluminium sesquioxide, carbon are weighed SiClx uses nebulization to prepare fine sand in the molten state;
(3) mixed powder step (1) obtained is sent into comminutor and is carried out pelletize, adds after screening Entering the fine sand continuation pelletize that step (2) obtains, becoming until obtaining ganoid casting model powder half Product;
(4) add in casting model powder semi-finished product the grog refractory of described parts by weight, bonding agent, Dispersant, after mix homogeneously, stirs 15-20min, then is dried, obtain dry semi-finished product;
(5) the dry semi-finished product in step (4) are sintered at 1350-1420 DEG C 1-2h, Obtain hot investment casting sand.
Described bonding agent is in phenolic resin, waterglass, vegetable oil, tower oil, polyvinyl alcohol One or more mixture.
In described dispersant peo resin, gelatin, sodium lignin sulfonate, Tissuemat E One or more mixture.
Described grog refractory be mass ratio be bauxite and the gangue mixture of 3: 2.
3 one kinds of hot investment casting sand of embodiment, it is made up of the raw material of following parts by weight: quartz 44 parts of stone, mullite 42 parts, 16 parts of corundum, manganese dioxide 9 parts, magnesium oxide 11 parts, Aluminium sesquioxide 8 parts, carborundum 8 parts, zircon 12 parts, grog refractory 13 parts, bonding Agent 6 parts, dispersant 10 parts.
A kind of hot investment casting sand and preparation technology thereof, comprise the following steps:
(1) quartz of described parts by weight, mullite, zircon, corundum are weighed respectively It is broken into the fragment less than 10mm, then grinds to form thin more than 99% of 320 mesh percent of pass respectively Powder, by the fine powder sieving obtained, blow clearly after be uniformly mixed to get mixed powder;
(2) manganese dioxide of described parts by weight, magnesium oxide, aluminium sesquioxide, carbon are weighed SiClx uses nebulization to prepare fine sand in the molten state;
(3) mixed powder step (1) obtained is sent into comminutor and is carried out pelletize, adds after screening Entering the fine sand continuation pelletize that step (2) obtains, becoming until obtaining ganoid casting model powder half Product;
(4) add in casting model powder semi-finished product the grog refractory of described parts by weight, bonding agent, Dispersant, after mix homogeneously, stirs 15-20min, then is dried, obtain dry semi-finished product;
(5) the dry semi-finished product in step (4) are sintered at 1350-1420 DEG C 1-2h, Obtain hot investment casting sand.
Described bonding agent is in phenolic resin, waterglass, vegetable oil, tower oil, polyvinyl alcohol One or more mixture.
In described dispersant peo resin, gelatin, sodium lignin sulfonate, Tissuemat E One or more mixture.
Described grog refractory be mass ratio be bauxite and the gangue mixture of 3: 2.
It is obvious to a person skilled in the art that the invention is not restricted to described one exemplary embodiment Details, and without departing from the spirit or essential characteristics of the present invention, it is possible to it His concrete form realizes the present invention.Therefore, no matter from the point of view of which point, all should be by embodiment Regarding exemplary as, and be nonrestrictive, the scope of the present invention is by claims Rather than described explanation limit, it is intended that by fall claim equivalency implication and In the range of all changes include in the present invention.Although moreover, it will be appreciated that this specification It is been described by according to embodiment, but the most each embodiment only comprises an independent technology Scheme, this narrating mode of description is only for clarity sake, and those skilled in the art should When using description as an entirety, the technical scheme in each embodiment can also be through suitable group Close, form other embodiments that it will be appreciated by those skilled in the art that.

Claims (5)

1. a hot investment casting sand, it is characterised in that it is former by following parts by weight Material composition: quartz 40-50 part, mullite 38-45 part, corundum 15-18 part, titanium dioxide Manganese 6-10 part, magnesium oxide 9-14 part, aluminium sesquioxide 5-12 part, carborundum 6-9 part, Zircon 10-16 part, grog refractory 10-15 part, bonding agent 5-8 part, dispersant 9-12 Part.
2. hot investment casting sand as claimed in claim 1 and a preparation technology thereof, it is special Levy and be, comprise the following steps:
(1) quartz of described parts by weight, mullite, zircon, corundum are weighed respectively It is broken into the fragment less than 10mm, then grinds to form thin more than 99% of 320 mesh percent of pass respectively Powder, by the fine powder sieving obtained, blow clearly after be uniformly mixed to get mixed powder;
(2) manganese dioxide of described parts by weight, magnesium oxide, aluminium sesquioxide, carbon are weighed SiClx uses nebulization to prepare fine sand in the molten state;
(3) mixed powder step (1) obtained is sent into comminutor and is carried out pelletize, adds after screening Entering the fine sand continuation pelletize that step (2) obtains, becoming until obtaining ganoid casting model powder half Product;
(4) add in casting model powder semi-finished product the grog refractory of described parts by weight, bonding agent, Dispersant, after mix homogeneously, stirs 15-20min, then is dried, obtain dry semi-finished product;
(5) the dry semi-finished product in step (4) are sintered at 1350-1420 DEG C 1-2h, Obtain hot investment casting sand.
A kind of hot investment casting sand the most according to claim 1 and preparation technology thereof, its It is characterised by: described bonding agent is phenolic resin, waterglass, vegetable oil, tower oil, polyethylene One or more mixture in alcohol.
A kind of hot investment casting sand the most according to claim 1 and preparation technology thereof, its It is characterised by: described dispersant peo resin, gelatin, sodium lignin sulfonate, poly-second One or more mixture in alkene wax.
A kind of hot investment casting sand the most according to claim 1 and preparation technology thereof, its Be characterised by: described grog refractory be mass ratio be bauxite and the gangue mixture of 3: 2.
CN201610439672.1A 2016-06-20 2016-06-20 Sand for precision casting and preparation process of sand for precision casting Pending CN105880463A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107838364A (en) * 2017-10-12 2018-03-27 东风精密铸造安徽有限公司 A kind of environment-friendly type casting material and preparation method thereof
CN107935566A (en) * 2017-11-30 2018-04-20 宁夏共享模具有限公司 A kind of casting sintering ceramsite and preparation method thereof
CN111906244A (en) * 2020-08-14 2020-11-10 湖南鑫恒环境科技有限公司 Process for casting molding sand by using coal gangue

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447453A (en) * 2013-08-10 2013-12-18 刘玉琴 Facing sand for precision casting
CN104646594A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Molding sand for machine molding and preparation method thereof
CN104646595A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Core molding sand containing spherical quartz and preparation method of core molding sand
CN104646600A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-cracking heat-resistant molding sand and preparation method thereof
CN105618667A (en) * 2015-12-30 2016-06-01 青岛博泰美联化工技术有限公司 Refractory casting sand
CN105618668A (en) * 2015-12-30 2016-06-01 青岛博泰美联化工技术有限公司 High-strength foundry sand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447453A (en) * 2013-08-10 2013-12-18 刘玉琴 Facing sand for precision casting
CN104646594A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Molding sand for machine molding and preparation method thereof
CN104646595A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Core molding sand containing spherical quartz and preparation method of core molding sand
CN104646600A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-cracking heat-resistant molding sand and preparation method thereof
CN105618667A (en) * 2015-12-30 2016-06-01 青岛博泰美联化工技术有限公司 Refractory casting sand
CN105618668A (en) * 2015-12-30 2016-06-01 青岛博泰美联化工技术有限公司 High-strength foundry sand

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107838364A (en) * 2017-10-12 2018-03-27 东风精密铸造安徽有限公司 A kind of environment-friendly type casting material and preparation method thereof
CN107935566A (en) * 2017-11-30 2018-04-20 宁夏共享模具有限公司 A kind of casting sintering ceramsite and preparation method thereof
CN111906244A (en) * 2020-08-14 2020-11-10 湖南鑫恒环境科技有限公司 Process for casting molding sand by using coal gangue

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Application publication date: 20160824

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