CN105328113A - Pre-coated sand used for casting and production method of pre-coated sand - Google Patents

Pre-coated sand used for casting and production method of pre-coated sand Download PDF

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Publication number
CN105328113A
CN105328113A CN201510725890.7A CN201510725890A CN105328113A CN 105328113 A CN105328113 A CN 105328113A CN 201510725890 A CN201510725890 A CN 201510725890A CN 105328113 A CN105328113 A CN 105328113A
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CN
China
Prior art keywords
sand
parts
casting
iron
coated sand
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
Application number
CN201510725890.7A
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Chinese (zh)
Inventor
张健
康德林
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.)
SHENYANG JINAN FOUNDRY MATERIAL Co Ltd
Original Assignee
SHENYANG JINAN FOUNDRY MATERIAL 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.)
Filing date
Publication date
Application filed by SHENYANG JINAN FOUNDRY MATERIAL Co Ltd filed Critical SHENYANG JINAN FOUNDRY MATERIAL Co Ltd
Priority to CN201510725890.7A priority Critical patent/CN105328113A/en
Publication of CN105328113A publication Critical patent/CN105328113A/en
Pending legal-status Critical Current

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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

Abstract

Pre-coated sand used for casting is mainly characterized by being prepared from 4-4.5 parts of scrubbing sand of 50-100 meshes, 83-85 parts of scrubbing sand of 70-140 meshes, 3.6-4 parts of alkaline phenolic resin, 2.4-2.5 parts of a urotropine solution with the concentration of 23-28%, 0.9-1 part of calcium stearate and 6-6.5 parts of iron sand (Fe3O4) of 70-140 meshes. The pre-coated sand changes the situation that existing products can only be applied to the iron casting industry, can be effectively used in the iron casting industry, and is widely applied and accepted in the steel casting industry, the alloy steel industry and the wear-resistant steel industry.

Description

A kind of casting precoated sand and production method thereof
Technical field
The present invention relates to a kind of heat cure Modeling Material, specifically a kind of casting precoated sand, and production method.
Background technology
Current precoated sand moulding very easily produces scab in Steel Castings, the shortcomings such as bleb is many appear that " tangerine peel " phenomenon, refractoriness are low, in cast(ing) surface.In addition, traditional precoated sand moulding, as needs improve refractoriness, must be coated with a coating again on its surface, thus add operation and production cost.
Summary of the invention
Object of the present invention, is to provide a kind of casting precoated sand, solves that scab easily appears in traditional precoated sand moulding, the problems such as the low and bleb of " tangerine peel " phenomenon, refractoriness is many appear in cast(ing) surface, effectively can improve casting quality, reduce production cost.
The technical scheme adopted is:
A kind of casting precoated sand, its feature is mainly methenamine solution 2.4-2.5 part of 23-28%, calcium stearate 1-0.9 part and 70-140 order iron sand (Fe by 50-100 order scouring sand 4-4.5 part, 70-140 object scouring sand 83-85 part, alkalescent phenol resin 3.6-4 part, concentration 30 4) 6-6.5 part is mixed with.
A kind of manufacture method of casting with precoated sand, be get that 50-100 object cleans sand 4-4.5 part, 70-140 object cleans sand 83-85 part and 70-140 order iron sand 6-6.5 part to add temperature be in the rotary gas heating furnace of 120 DEG C, when temperature reaches 115 DEG C, keep 2-3 minute, under drain in planetary puddle mixer, methenamine solution 2.4-2.5 part that alkalescent phenol resin 3.6-4 part and concentration are 23-28% is added in planetary puddle mixer, stir and add calcium stearate 1-0.9 part after 1.5-2 minute, stir 4-5 minute, discharging, vibrosieve, cooling, to obtain final product.
Mixture principle of the present invention and advantage:
1, rational Granular Computing:
The selection of specification and the determination of addition of cleaning sand are the key factors ensureing precoated sand intensity, gas forming amount, and therefore we adopt AFS value to confirm the granularity of variety classes precoated sand, and adjust according to the size of AFS value.To ensure best working strength and the gas forming amount of this product.
2, the adding of iron sand:
Heat-resisting quantity, the Quench performance of iron sand are given prominence to, iron sand add the refractoriness directly enhancing such precoated sand.Meanwhile, the Quench of iron sand, directly solves cast(ing) surface " tangerine peel " situation.So-called " tangerine peel " phenomenon is the defect that size appears in cast(ing) surface, the degree of depth differs.
Range of application:
Instant invention overcomes the situation that existing product can only be applied in cast iron industry, the present invention not only effectively uses in cast iron industry, is obtained for and applies in cast steel industry, steel alloy industry, abrasion-resistant stee industry widely and approve.
Detailed description of the invention
Embodiment one
A kind of casting precoated sand, is be the methenamine solution 2.4 parts of 23-28%, calcium stearate 1 part and 6 parts, 70-140 object iron sand by 50-100 order scouring 4 parts, sand, 70-140 object scouring 83 parts, sand, alkalescent phenol resin 3.6 parts, concentration, is mixed.
Embodiment two
A kind of preparation method cast with precoated sand, get 50-100 object to clean 4 parts, sand, 70-140 object scouring 83 parts, sand and 6 parts, 70-140 object iron sand, joining temperature is in the rotary gas heating furnace of 120 DEG C, when temperature rises to 115 DEG C, keep after 2 minutes, bleed in planetary puddle mixer, the methenamine solution 2.4 parts that alkalescent phenol resin 3.6 parts and concentration are 23-28% is added again in planetary puddle mixer, mix and blend adds calcium stearate 1 part after 1.5 minutes, be uniformly mixed 4 minutes, obtain final product.

Claims (3)

1. a casting precoated sand, methenamine solution 2.4-2.5 part that its feature mainly cleans sand 4-4.5 part by 50-100 order, 70-140 object cleans sand 83-85 part, alkalescent phenol resin 3.6-4 part, concentration are 23-28%, calcium stearate 1-0.9 part and 70-140 order iron sand (Fe 30 4) 6-6.5 part is mixed with.
2. a kind of casting precoated sand according to claim 1, it is characterized in that methenamine solution 2.4 parts, calcium stearate 1 part and 6 parts, the 70-140 object iron sand of cleaning 4 parts, sand by 50-100 order, 70-140 object cleans 83 parts, sand, alkalescent phenol resin 3.6 parts, concentration are 23-28%, be mixed.
3. cast the preparation method with precoated sand for one kind, it is characterized in that getting 50-100 object cleans 4 parts, sand, 70-140 object scouring 83 parts, sand and 6 parts, 70-140 object iron sand, joining temperature is in the rotary gas heating furnace of 120 DEG C, when temperature rises to 115 DEG C, keep after 2 minutes, bleed in planetary puddle mixer, the methenamine solution 2.4 parts that alkalescent phenol resin 3.6 parts and concentration are 23-28% is added again in planetary puddle mixer, mix and blend adds calcium stearate 1 part after 1.5 minutes, be uniformly mixed 4 minutes, obtain final product.
CN201510725890.7A 2015-11-02 2015-11-02 Pre-coated sand used for casting and production method of pre-coated sand Pending CN105328113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510725890.7A CN105328113A (en) 2015-11-02 2015-11-02 Pre-coated sand used for casting and production method of pre-coated sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510725890.7A CN105328113A (en) 2015-11-02 2015-11-02 Pre-coated sand used for casting and production method of pre-coated sand

Publications (1)

Publication Number Publication Date
CN105328113A true CN105328113A (en) 2016-02-17

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Family Applications (1)

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CN201510725890.7A Pending CN105328113A (en) 2015-11-02 2015-11-02 Pre-coated sand used for casting and production method of pre-coated sand

Country Status (1)

Country Link
CN (1) CN105328113A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105537503A (en) * 2016-02-29 2016-05-04 无锡烨隆精密机械有限公司 Sand burning preventive precoated sand for casting of turbine casing
CN105562587A (en) * 2016-02-29 2016-05-11 无锡烨隆精密机械有限公司 Molding sand for reducing cracks on casting and application of molding sand
CN107377864A (en) * 2017-07-25 2017-11-24 江苏亚威铸造材料科技有限公司 Dustless processing technology of precoated sand and preparation method thereof
CN108031788A (en) * 2017-12-12 2018-05-15 中国兵器工业第五九研究所 A kind of aluminium alloy casting compound sand core of high heat conduction and preparation method thereof
CN108273958A (en) * 2017-12-29 2018-07-13 沈阳金安铸造材料有限公司 A kind of preparation method of Anti-vein precoated sand

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105537503A (en) * 2016-02-29 2016-05-04 无锡烨隆精密机械有限公司 Sand burning preventive precoated sand for casting of turbine casing
CN105562587A (en) * 2016-02-29 2016-05-11 无锡烨隆精密机械有限公司 Molding sand for reducing cracks on casting and application of molding sand
CN107377864A (en) * 2017-07-25 2017-11-24 江苏亚威铸造材料科技有限公司 Dustless processing technology of precoated sand and preparation method thereof
CN108031788A (en) * 2017-12-12 2018-05-15 中国兵器工业第五九研究所 A kind of aluminium alloy casting compound sand core of high heat conduction and preparation method thereof
CN108273958A (en) * 2017-12-29 2018-07-13 沈阳金安铸造材料有限公司 A kind of preparation method of Anti-vein precoated sand

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Application publication date: 20160217

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