CN106077432A - A kind of automobile gearbox casting water glass core sand and preparation method thereof - Google Patents
A kind of automobile gearbox casting water glass core sand and preparation method thereof Download PDFInfo
- Publication number
- CN106077432A CN106077432A CN201610680975.2A CN201610680975A CN106077432A CN 106077432 A CN106077432 A CN 106077432A CN 201610680975 A CN201610680975 A CN 201610680975A CN 106077432 A CN106077432 A CN 106077432A
- Authority
- CN
- China
- Prior art keywords
- sand
- preparation
- water glass
- automobile gearbox
- carbamide
- 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.)
- Pending
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Classifications
-
- 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
- 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
- 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
- B22C1/10—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 for influencing the hardening tendency of the mould material
Abstract
The invention discloses a kind of automobile gearbox casting water glass core sand and preparation method thereof, it is formed by the preparation of raw material of following weight portion: do not come sand 80 100, used sodium silicate sand 70 80, red beach 15 20, picrite 20 25, Tungsten tailing 30 40, waterglass 10 12, Hawaii shell powder 57, oxidation hydroxypropyl starch 24, carbamide 35, Basic Magnesium Aluminum Carbonate 68, titanium silica flour 24, cristobalite 46, dicalcium silicate 35 etc..The core sand of the present invention recycles reclaiming sand, has saved production cost, and in casting process, gas forming amount is little, green compression strength is high, and collapsibility is good；The at high temperature decomposes such as the carbamide of interpolation, Hawaii shell powder, Basic Magnesium Aluminum Carbonate, imino-diacetic ichthyodin, evolved gas, a large amount of bubble and crackle is produced in waterglass adhesive film, increase collapsibility, the glucomannan of interpolation, dicalcium silicate etc. accelerate the hardening rate of core sand, improve sand bond.
Description
Invention field
The invention belongs to foundary industry field, concretely relate to a kind of automobile gearbox casting water glass core sand and
Its preparation method.
Background technology
Automobile gearbox is frequently referred to " change speed gear box " in the car；In industrial machinery, it is frequently referred to " variable-speed motor ", is by machine
The mechanically or hydraulically equipment of tool power conversion.Past produces automobile gearbox and all uses clay-beaded sand, to deliver to dry after having made type
Dry baking oven is done, and the production cycle is long, and casting accuracy is poor, and labor condition is poor, can not meet far away the needs of production development.Water-glass sand
The features such as owing to mobility is high, compact rate of molding is high, and hardening is fast, and casting accuracy is high, and source is relatively wide, cheap, environmental protection, become
For one of molding sand kind the most with fastest developing speed.Current most of steel-casting and large-sized iron casting use water-glass sand work
Skill produces, although water-glass sand advantage is a lot, but also exists that green compression strength is low, collapsibility is poor, and peeling is abnormal the most difficult
Etc. shortcoming.
Summary of the invention
The invention aims to make up the defect of prior art, it is provided that a kind of automobile gearbox casting water glass core
Sand and preparation method thereof.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of automobile gearbox casting water glass core sand, is formed by the preparation of raw material of following weight portion: do not come sand 80-100, water
Glass sand 70-80, red beach 15-20, picrite 20-25, Tungsten tailing 30-40, waterglass 10-12, Hawaii shell powder 5-
7, oxidation hydroxypropyl starch 2-4, carbamide 3-5, Basic Magnesium Aluminum Carbonate 6-8, titanium silica flour 2-4, cristobalite 4-6, dicalcium silicate 3-5,
Hemp-fibred plaster 15-17, zinc fluoroborate 4-7, polymine 3-4, glucomannan 1-2, imino-diacetic ichthyodin 2-3, water are appropriate.
The preparation method of a kind of automobile gearbox casting water glass core sand, comprises the following steps:
(1) by cristobalite, red beach, picrite, Tungsten tailing mix homogeneously, it is broken into 50-60 mesh, is then fed into 900-1000 DEG C
Calcining furnace is calcined 60-80min, after taking-up, adds the water stirring not coming sand and used sodium silicate sand and gross mass 15-20% while hot
10-15min, is ground into 100-120 mesh again after dehydration post-drying, obtains reclaimed sand；
(2) carbamide, Basic Magnesium Aluminum Carbonate, titanium silica flour, dicalcium silicate, hemp-fibred plaster are ground into 120-150 mesh, are subsequently adding regeneration
Sand, polymine, glucomannan, imino-diacetic ichthyodin are dry mixed 8-10min in puddle mixer, obtain modified mixed sand；
(3) add in modified mixed sand waterglass, Hawaii shell powder, the oxidation raw material such as hydroxypropyl starch, zinc fluoroborate with
And suitable quantity of water, shake out after mixing 15-20min under the rotating speed of 250-300r/min, to obtain final product.
Beneficial effects of the present invention:
The core sand of the present invention recycles reclaiming sand, has saved production cost, and in casting process, gas forming amount is little, wet pressing is strong
Degree height, collapsibility is good；The carbamide of interpolation, Hawaii shell powder, Basic Magnesium Aluminum Carbonate, imino-diacetic ichthyodin etc. are at high temperature subject to
Thermal decomposition, evolved gas, in waterglass adhesive film, produce a large amount of bubble and crackle, increase collapsibility, Portugal's manna of interpolation gathers
Sugar, dicalcium silicate etc. accelerate the hardening rate of core sand, improve sand bond.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme of the present invention is further described.
Embodiment 1:
A kind of automobile gearbox casting water glass core sand, is formed by the preparation of raw material of following weight portion (kg): do not come sand 80, water
Glass sand 70, red beach 15, picrite 20, Tungsten tailing 30, waterglass 10, Hawaii shell powder 5, oxidation hydroxypropyl starch 2,
Carbamide 3, Basic Magnesium Aluminum Carbonate 6, titanium silica flour 2, cristobalite 4, dicalcium silicate 3, hemp-fibred plaster 15, zinc fluoroborate 4, polymine 3,
Glucomannan 1, imino-diacetic ichthyodin 2, water are appropriate.
The preparation method of a kind of automobile gearbox casting water glass core sand, comprises the following steps:
(1) by cristobalite, red beach, picrite, Tungsten tailing mix homogeneously, it is broken into 50-60 mesh, is then fed into 900-1000 DEG C
Calcining furnace is calcined 60-80min, after taking-up, adds the water stirring not coming sand and used sodium silicate sand and gross mass 15-20% while hot
10-15min, is ground into 100-120 mesh again after dehydration post-drying, obtains reclaimed sand；
(2) carbamide, Basic Magnesium Aluminum Carbonate, titanium silica flour, dicalcium silicate, hemp-fibred plaster are ground into 120-150 mesh, are subsequently adding regeneration
Sand, polymine, glucomannan, imino-diacetic ichthyodin are dry mixed 8-10min in puddle mixer, obtain modified mixed sand；
(3) add in modified mixed sand waterglass, Hawaii shell powder, the oxidation raw material such as hydroxypropyl starch, zinc fluoroborate with
And suitable quantity of water, shake out after mixing 15-20min under the rotating speed of 250-300r/min, to obtain final product.
Embodiment 2:
A kind of automobile gearbox casting water glass core sand, is formed by the preparation of raw material of following weight portion (kg): do not come sand 90, water
Glass sand 75, red beach 17.5, picrite 22.5, Tungsten tailing 35, waterglass 11, Hawaii shell powder 6, oxidation hydroxypropyl form sediment
Powder 3, carbamide 4, Basic Magnesium Aluminum Carbonate 7, titanium silica flour 3, cristobalite 5, dicalcium silicate 4, hemp-fibred plaster 16, zinc fluoroborate 5.5, polyethylene
Imines 3.5, glucomannan 1.5, imino-diacetic ichthyodin 2.5, water are appropriate.
Preparation method is with embodiment 1.
Embodiment 3:
A kind of automobile gearbox casting water glass core sand, is formed by the preparation of raw material of following weight portion (kg): do not come sand 100,
Used sodium silicate sand 80, red beach 20, picrite 25, Tungsten tailing 40, waterglass 12, Hawaii shell powder 7, oxidation hydroxypropyl starch
4, carbamide 5, Basic Magnesium Aluminum Carbonate 8, titanium silica flour 4, cristobalite 6, dicalcium silicate 5, hemp-fibred plaster 17, zinc fluoroborate 7, polymine
4, glucomannan 2, imino-diacetic ichthyodin 3, water are appropriate.
Preparation method is with embodiment 1.
The performance test results such as following table institute of the automobile gearbox casting water glass core sand that above-described embodiment 1-3 prepares
Show:
Claims (2)
1. an automobile gearbox casting water glass core sand, it is characterised in that formed by the preparation of raw material of following weight portion: not
Come sand 80-100, used sodium silicate sand 70-80, red beach 15-20, picrite 20-25, Tungsten tailing 30-40, waterglass 10-12, summer
The smooth shell powder 5-7 of prestige, oxidation hydroxypropyl starch 2-4, carbamide 3-5, Basic Magnesium Aluminum Carbonate 6-8, titanium silica flour 2-4, cristobalite 4-6,
Dicalcium silicate 3-5, hemp-fibred plaster 15-17, zinc fluoroborate 4-7, polymine 3-4, glucomannan 1-2, imino-diacetic sulfonic acid
Ammonium 2-3, water are appropriate.
The preparation method of a kind of automobile gearbox casting water glass core sand the most according to claim 1, it is characterised in that
Comprise the following steps:
(1) by cristobalite, red beach, picrite, Tungsten tailing mix homogeneously, it is broken into 50-60 mesh, is then fed into 900-1000 DEG C
Calcining furnace is calcined 60-80min, after taking-up, adds the water stirring not coming sand and used sodium silicate sand and gross mass 15-20% while hot
10-15min, is ground into 100-120 mesh again after dehydration post-drying, obtains reclaimed sand；
(2) carbamide, Basic Magnesium Aluminum Carbonate, titanium silica flour, dicalcium silicate, hemp-fibred plaster are ground into 120-150 mesh, are subsequently adding regeneration
Sand, polymine, glucomannan, imino-diacetic ichthyodin are dry mixed 8-10min in puddle mixer, obtain modified mixed sand；
(3) add in modified mixed sand waterglass, Hawaii shell powder, the oxidation raw material such as hydroxypropyl starch, zinc fluoroborate with
And suitable quantity of water, shake out after mixing 15-20min under the rotating speed of 250-300r/min, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610680975.2A CN106077432A (en) | 2016-08-18 | 2016-08-18 | A kind of automobile gearbox casting water glass core sand and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610680975.2A CN106077432A (en) | 2016-08-18 | 2016-08-18 | A kind of automobile gearbox casting water glass core sand and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106077432A true CN106077432A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610680975.2A Pending CN106077432A (en) | 2016-08-18 | 2016-08-18 | A kind of automobile gearbox casting water glass core sand and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104071A (en) * | 1987-06-02 | 1988-01-13 | 龙松生 | Turpentine emulsion type sand adhesive |
| CN1114600A (en) * | 1994-07-05 | 1996-01-10 | 江苏理工大学 | Method for preparation of organic ester water glass self-hardening sand by using reclaimed sand |
| CN103567355A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Organic ester sodium silicate self-hardening sand and preparation method thereof |
| CN104801655A (en) * | 2015-04-01 | 2015-07-29 | 江守仲 | High-strength foundry casting sand and preparation method thereof |
| CN104841856A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Molding sand with reducibility and preparation method thereof |
| CN105478654A (en) * | 2015-12-31 | 2016-04-13 | 安徽创奇乐智能游乐设备有限公司 | High-strength and high-temperature-resistance molding sand and preparation method thereof |
-
2016
- 2016-08-18 CN CN201610680975.2A patent/CN106077432A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104071A (en) * | 1987-06-02 | 1988-01-13 | 龙松生 | Turpentine emulsion type sand adhesive |
| CN1114600A (en) * | 1994-07-05 | 1996-01-10 | 江苏理工大学 | Method for preparation of organic ester water glass self-hardening sand by using reclaimed sand |
| CN103567355A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Organic ester sodium silicate self-hardening sand and preparation method thereof |
| CN104801655A (en) * | 2015-04-01 | 2015-07-29 | 江守仲 | High-strength foundry casting sand and preparation method thereof |
| CN104841856A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Molding sand with reducibility and preparation method thereof |
| CN105478654A (en) * | 2015-12-31 | 2016-04-13 | 安徽创奇乐智能游乐设备有限公司 | High-strength and high-temperature-resistance molding sand and preparation method thereof |
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Application publication date: 20161109 |
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