CN108160928A - A kind of resin sand core manufacturing craft - Google Patents
A kind of resin sand core manufacturing craft Download PDFInfo
- Publication number
- CN108160928A CN108160928A CN201810000723.XA CN201810000723A CN108160928A CN 108160928 A CN108160928 A CN 108160928A CN 201810000723 A CN201810000723 A CN 201810000723A CN 108160928 A CN108160928 A CN 108160928A
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- CN
- China
- Prior art keywords
- sand
- resin
- parts
- mixed
- core
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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.)
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Classifications
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- 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
-
- 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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/18—Finishing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of resin sand core manufacturing crafts, include the following steps：S1, resin, curing agent and roughing sand are mixed to form mixed sand in proportion；S2, the brushing releasing agent on mold；S3, core box is got togather after waiting for releasing agent drying, arbor and chill, loose piece is put into core box, mixed sand is inserted into core box and reality of pounding rapidly；Air-out needle or outlet rope are extracted and to form exhaust duct after s4, sand rammer reality to be mixed；Core box is opened after s5, mould surface to be mixed hardening；S6, core finishing is carried out after sand solidified, removes the flash and burr of mould surface, check unfilled corner and hole and with mending paste repaired both finished product sand mold；S7, ethyl alcohol mixing is added in coating, finished product mould surface is uniformly applied to hairbrush；S8, burning coating material is put immediately after having brushed, resin sand core will be obtained after finished product mold drying after fully burning and cooling down.The present invention mixes resin, curing agent and roughing sand in proportion, and manufactured sand core adhesion effect is good, stabilized structure and surface is smooth.
Description
Technical field
The present invention relates to casting fields, are specifically related to a kind of resin sand core manufacturing craft.
Background technology
Casting technique is using technology and methods of the casting in relation to theoretical and systematic knowledge production casting, including Modeling Material
Preparation, moulding, coremaking, Metal Melting, cast and solidification control etc., coremaking is the important step in casting technique, is produced
The quality of core pattern directly influences the quality of the product cast out, however the sand core that existing core manufacturing craft produces exists easily
Cracking unfilled corner, rough, exhaust duct block, and the piece surface produced that causes finally to cast is with feelings such as burr or cracks
Condition, audio and video products quality.
Invention content
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of resin sand core manufacturing crafts.
The technical solution adopted by the present invention is：
A kind of resin sand core manufacturing craft, which is characterized in that include the following steps：
S1, resin, curing agent and roughing sand are mixed to form mixed sand in proportion；
S2, inspection simultaneously clear up core box, the brushing releasing agent on core box；
S3, core box is got togather after waiting for releasing agent drying, arbor and chill, loose piece is put into core box, rapidly by mixed sand
Insert core box and pound it is real form sand mold, wherein, pound it is real before in the position of exhaust duct and pre-set air-out needle or outlet rope；
Air-out needle or outlet rope are extracted and to form exhaust duct after s4, sand rammer reality to be mixed；
S5, core box is opened after mould surface hardening, is struck off mould surface with scraper plate；
S6, core finishing is carried out after sand solidified, removes the flash and burr of mould surface, check unfilled corner and hole and with repairing
It pastes up to be repaired and both obtains finished product sand mold；
S7, ethyl alcohol mixing is added in coating, finished product mould surface is uniformly applied to hairbrush and forms coating；
S8, burning coating material is put immediately after having brushed, finished product sand mold is put into oven after drying after fully burning and cooling down and is taken
Go out up to resin sand core.
Further, SiO2 contents are not less than 96% in roughing sand in the s1 steps, and water content is not more than 0.2%, mud
Amount no more than 2%, in roughing sand the particle size range of large-size particle between 40-70 mesh, the particle size range of small sized particles is in 70-
Between 140 mesh；The resin quality accounts for the 1.4-2.0% of roughing sand quality, and the curing agent quality accounts for the 30- of resin quality
40%；First resin and half roughing sand are mixed, curing agent and the other half roughing sand mix, then by the roughing sand for being mixed with resin and are mixed with solid
The roughing sand of agent mixes, for improving the intensity and gas forming amount of mixed sand.
Further, interim positioning pin used for positioning is provided on loose piece in the s3 steps, faced after back-up sand
When positioning pin to take out and with mixed sand by take out formed recess fill up, prevent from damaging casting mold during draft.
Further, mending paste is prepared from the following raw materials in parts by weight in the s6 steps：It is 65-70 parts of washed-out sand, thin
8-10 parts of sand, 3-5 parts of pre-gelatinized starch, 2-3 parts of sodium bentonite, 0.2-0.5 parts of cellulose, fatty alcohol polyoxyethylene ether 0.1-
0.5 part, water surplus.
Further, the granularity of the washed-out sand is 70-150 mesh, and the granularity of the fine sand is more than 200 mesh.
Further, coating is prepared from the following raw materials in parts by weight in the s7 steps：40-50 parts of graphite powder, diatom
10-15 parts native, 6-9 parts of lauryl sodium sulfate, 2-5 parts of titanium dioxide, 2-6 parts of binding agent, 5-10 parts of acrylic resin, tristearin
It is 20-30 parts that 10-15 parts of amide, wherein graphite powder and titanium dioxide, which cross 200 mesh sieve and the ethyl alcohol number of coating mixing,.
Preferably, the content of silica is more than 90% in the diatomite, and the content of iron oxide is 1-1.5%.
Preferably, the binding agent is one or more of epoxy resin, phenolic resin, vegetable oil or polyimides.
Wherein, drying temperature is 180-200 DEG C in the s8 steps, drying time 60-80min.
Beneficial effects of the present invention：
The present invention mixes resin, curing agent and roughing sand in proportion, and manufactured sand core adhesion effect is good, is easily molded, and
Stabilized structure is firm；Exhaust duct is formed using the method for pre-setting air-out needle or outlet rope, it is susceptible to plugging to solve exhaust duct
Problem；Sand mold is repaired using special mending paste, crack resistance is good, strong adhesive force, can rapid osmotic sand core, it is dry
Soon, it is not easily to fall off and be not easy to deform；By the way that the coating material of ethyl alcohol will be mixed in the surface of finished product core pattern and burning so that sand
Wicking surface is more smooth, and overall structure is more firm, and wherein coating uses graphite powder cast paint, this paint adhesion is strong, and can have
Effect prevents from being stained with sand phenomenon during casting.
Specific embodiment
The invention discloses a kind of resin sand core manufacturing crafts, include the following steps：
S1, resin, curing agent and roughing sand are mixed to form mixed sand in proportion, wherein SiO2 contents are not less than in roughing sand
96%, water content is not more than 0.2%, and mud amount is not more than 2%, in roughing sand the particle size range of large-size particle 40-70 mesh it
Between, the particle size ranges of small sized particles is between 70-140 mesh；Resin quality accounts for the 1.4-2.0% of roughing sand quality, curing agent
Quality accounts for the 30-40% of resin quality；First resin and half roughing sand are mixed, curing agent and the other half roughing sand mix, then will be mixed
The roughing sand for having resin and the roughing sand for being mixed with curing agent mix, for improving the intensity and gas forming amount of mixed sand；
S2, inspection simultaneously clear up core box, the brushing releasing agent on core box；
S3, core box is got togather after waiting for releasing agent drying, arbor and chill, loose piece is put into core box, is provided on loose piece
Mixed sand is inserted core box and reality of pounding by interim positioning pin used for positioning rapidly, then by interim taking out positioning pin and with mixing
Sand fills up the recess for taking out formation, prevents from damaging casting mold during draft；Wherein, pound it is real before set in the position of exhaust duct and in advance
Air-out needle or outlet rope are put, for the exhaust duct of small size using air-out needle, large-sized exhaust duct uses outlet rope；
Air-out needle or outlet rope are extracted and to form exhaust duct after s4, sand rammer reality to be mixed；
Core box is opened after s5, mould surface to be mixed hardening, is struck off mould surface with scraper plate；
S6, core finishing is carried out after sand solidified, removes the flash and burr of mould surface, check unfilled corner and hole and with repairing
It pastes up to be repaired and both obtains finished product sand mold, wherein, mending paste is prepared from the following raw materials in parts by weight：It is 65-70 parts of washed-out sand, thin
8-10 parts of sand, 3-5 parts of pre-gelatinized starch, 2-3 parts of sodium bentonite, 0.2-0.5 parts of cellulose, fatty alcohol polyoxyethylene ether 0.1-
0.5 part, water surplus, the granularity of washed-out sand is 70-150 mesh, and the granularity of fine sand is more than 200 mesh, using the repairing of more than ingredient
Cream through good, strong adhesive force of testing crack resistance, can rapid osmotic sand core, it is fast drying, not easily to fall off and be not easy to deform；
S7, ethyl alcohol mixing is added in coating, finished product mould surface is uniformly applied to hairbrush and forms coating；Preferably,
Coating uses graphite powder cast paint, is prepared from the following raw materials in parts by weight：40-50 parts of graphite powder, 10-15 parts of diatomite,
6-9 parts of lauryl sodium sulfate, 2-5 parts of titanium dioxide, 2-6 parts of binding agent, 5-10 parts of acrylic resin, stearmide 10-15
Part, it is 20-30 parts that wherein graphite powder and titanium dioxide, which cross 200 mesh sieve and the ethyl alcohol number of coating mixing, titanium dioxide in diatomite
The content of silicon is more than 90%, and the content of iron oxide is 1-1.5%, and binding agent is epoxy resin, phenolic resin, vegetable oil or polyamides
One or more of imines is combined the bonding to be formed in the present embodiment using epoxy resin, phenolic resin, polyimides
Agent, this graphite powder cast paint, this paint adhesion is strong, and can effectively prevent and be stained with sand phenomenon during casting；
S8, burning coating material is put immediately after having brushed, finished product sand mold is put into oven after fully burning and cooling down and is dried,
In, drying temperature is 180-200 DEG C, drying time 60-80min in s8 steps, is finally taken out up to resin sand core.
The present invention mixes resin, curing agent and roughing sand in proportion, and manufactured sand core adhesion effect is good, is easily molded, and
Stabilized structure is firm；Exhaust duct is formed using the method for pre-setting air-out needle or outlet rope, it is susceptible to plugging to solve exhaust duct
Problem；Sand mold is repaired using special mending paste, crack resistance is good, strong adhesive force, can rapid osmotic sand core, it is dry
Soon, it is not easily to fall off and be not easy to deform；By the way that the coating material of ethyl alcohol will be mixed in the surface of finished product core pattern and burning so that sand
Wicking surface is more smooth, and overall structure is more firm, and wherein coating uses graphite powder cast paint, this paint adhesion is strong, and can have
Effect prevents from being stained with sand phenomenon during casting.
The foregoing is merely the present invention preferred embodiments, the present invention is not limited to the above embodiment, if with
Essentially identical means realize that the technical solution of the object of the invention is belonged within protection scope of the present invention.
Claims (9)
1. a kind of resin sand core manufacturing craft, which is characterized in that include the following steps：
S1, resin, curing agent and roughing sand are mixed to form mixed sand in proportion；
S2, inspection simultaneously clear up core box, the brushing releasing agent on core box；
S3, core box is got togather after waiting for releasing agent drying, arbor and chill, loose piece is put into core box, rapidly inserts mixed sand
Core box and pound it is real form sand mold, wherein, pound it is real before in the position of exhaust duct and pre-set air-out needle or outlet rope；
Air-out needle or outlet rope are extracted and to form exhaust duct after s4, sand rammer reality to be mixed；
S5, core box is opened after mould surface hardening, is struck off mould surface with scraper plate；
S6, core finishing is carried out after sand solidified, removes the flash and burr of mould surface, check unfilled corner and hole and use mending paste
It is repaired and both obtains finished product sand mold；
S7, ethyl alcohol mixing is added in coating, finished product mould surface is uniformly applied to hairbrush and forms coating；
S8, burning coating material is put immediately after having brushed, finished product sand mold is put into oven after drying after fully burning and cooling down and is taken out i.e.
Obtain resin sand core.
2. a kind of resin sand core manufacturing craft according to claim 1, it is characterised in that：SiO2 in roughing sand in the s1 steps
Content is not less than 96%, and water content is not more than 0.2%, and mud amount is no more than 2%, and the particle size range of large-size particle exists in roughing sand
Between 40-70 mesh, the particle size range of small sized particles is between 70-140 mesh；The resin quality accounts for the 1.4- of roughing sand quality
2.0%, the curing agent quality accounts for the 30-40% of resin quality；First resin and half roughing sand are mixed, curing agent and the other half
Roughing sand mixes, then the roughing sand for being mixed with resin and the roughing sand for being mixed with curing agent are mixed, for improving the strong of mixed sand
Degree and gas forming amount.
3. a kind of resin sand core manufacturing craft according to claim 1, it is characterised in that：It is set on loose piece in the s3 steps
The interim positioning pin of positioning is useful for, interim positioning pin will take out and will take out the recess formed with mixed sand after back-up sand
Place is filled up, and prevents from damaging casting mold during draft.
4. a kind of resin sand core manufacturing craft according to claim 1, it is characterised in that：In the s6 steps mending paste by with
The raw material of lower parts by weight is made：65-70 parts of washed-out sand, 8-10 parts of fine sand, 3-5 parts of pre-gelatinized starch, sodium bentonite 2-3
Part, 0.2-0.5 parts of cellulose, 0.1-0.5 parts of fatty alcohol polyoxyethylene ether, water surplus.
5. a kind of resin sand core manufacturing craft according to claim 4, it is characterised in that：The granularity of the washed-out sand is 70-
150 mesh, the granularity of the fine sand is more than 200 mesh.
6. a kind of resin sand core manufacturing craft according to claim 1, it is characterised in that：Coating is by following in the s7 steps
The raw material of parts by weight is made：40-50 parts of graphite powder, 10-15 parts of diatomite, 6-9 parts of lauryl sodium sulfate, titanium dioxide 2-
5 parts, 2-6 parts of binding agent, 5-10 parts of acrylic resin, 10-15 parts of stearmide, wherein graphite powder and titanium dioxide cross 200 mesh
Sieve and the ethyl alcohol number of coating mixing are 20-30 parts.
7. a kind of resin sand core manufacturing craft according to claim 6, it is characterised in that：Silica in the diatomite
Content is more than 90%, and the content of iron oxide is 1-1.5%.
8. a kind of resin sand core manufacturing craft according to claim 6, it is characterised in that：The binding agent for epoxy resin,
One or more of phenolic resin, vegetable oil or polyimides.
9. a kind of resin sand core manufacturing craft according to claim 1, it is characterised in that：Drying temperature is in the s8 steps
180-200 DEG C, drying time 60-80min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000723.XA CN108160928A (en) | 2018-01-02 | 2018-01-02 | A kind of resin sand core manufacturing craft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000723.XA CN108160928A (en) | 2018-01-02 | 2018-01-02 | A kind of resin sand core manufacturing craft |
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| Publication Number | Publication Date |
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| CN108160928A true CN108160928A (en) | 2018-06-15 |
Family
ID=62516927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810000723.XA Pending CN108160928A (en) | 2018-01-02 | 2018-01-02 | A kind of resin sand core manufacturing craft |
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| Country | Link |
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| CN (1) | CN108160928A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396340A (en) * | 2018-12-26 | 2019-03-01 | 黄石新兴管业有限公司 | It is a kind of for making the casting technique of large-scale grey iron bottom plate |
| CN109794580A (en) * | 2019-03-21 | 2019-05-24 | 河南省西峡汽车水泵股份有限公司 | A kind of internal combustion engine water pump sand core for casting and preparation method thereof |
| CN110153369A (en) * | 2019-05-07 | 2019-08-23 | 广东恒成科技股份有限公司 | A kind of consumption of resin sand reduces and the increased sand casting process of intensity |
| CN110421121A (en) * | 2019-08-29 | 2019-11-08 | 贵州安吉航空精密铸造有限责任公司 | A kind of vent control valve tube core manufacturing method in casting technique |
| CN111231054A (en) * | 2020-01-07 | 2020-06-05 | 西华大学 | Gypsum model making method for runner flow passage of mixed flow turbine and parting agent thereof |
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| CN103990764A (en) * | 2014-05-20 | 2014-08-20 | 朝阳佳诚耐火材料有限公司 | Casting sand core repairing paste and preparation method thereof |
| CN104117628A (en) * | 2014-07-30 | 2014-10-29 | 吴江市液铸液压件铸造有限公司 | Graphite powder casting coating and preparation method thereof |
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| CN104117628A (en) * | 2014-07-30 | 2014-10-29 | 吴江市液铸液压件铸造有限公司 | Graphite powder casting coating and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396340A (en) * | 2018-12-26 | 2019-03-01 | 黄石新兴管业有限公司 | It is a kind of for making the casting technique of large-scale grey iron bottom plate |
| CN109794580A (en) * | 2019-03-21 | 2019-05-24 | 河南省西峡汽车水泵股份有限公司 | A kind of internal combustion engine water pump sand core for casting and preparation method thereof |
| CN110153369A (en) * | 2019-05-07 | 2019-08-23 | 广东恒成科技股份有限公司 | A kind of consumption of resin sand reduces and the increased sand casting process of intensity |
| CN110421121A (en) * | 2019-08-29 | 2019-11-08 | 贵州安吉航空精密铸造有限责任公司 | A kind of vent control valve tube core manufacturing method in casting technique |
| CN111231054A (en) * | 2020-01-07 | 2020-06-05 | 西华大学 | Gypsum model making method for runner flow passage of mixed flow turbine and parting agent thereof |
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Application publication date: 20180615 |
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