CN109746383A - A kind of steel-casting precoated sand process for making shell - Google Patents
A kind of steel-casting precoated sand process for making shell Download PDFInfo
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- CN109746383A CN109746383A CN201910223109.4A CN201910223109A CN109746383A CN 109746383 A CN109746383 A CN 109746383A CN 201910223109 A CN201910223109 A CN 201910223109A CN 109746383 A CN109746383 A CN 109746383A
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Abstract
The present invention relates to process for making shell technical fields, especially a kind of steel-casting precoated sand process for making shell, process for making shell is the following steps are included: choosing natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent is raw material, and chooses lubricant and high temperature resistant additive as auxiliary material；It pours into sand mixer after natural siliceous sand is screened, after heating temperature to 180-200 degree, is mixed into thermoplastic phenolic resin in the ratio of 15-20:1, temperature is adjusted downward to 120-150 degree；Methenamine and reinforcing agent are mixed into the ratio of 30-35:1；The raw material mixed is imported in core shooter, mold is heated to 420-450 degree, is fed injection into mold by core shooter；So that mold is naturally cooling to 60-80 degree, mold is opened and takes out overlay film arenaceous shell, overlay film arenaceous shell is put into hot-air seasoning in drying unit, is formed naturally after making it dry, as molding overlay film arenaceous shell.Present invention process is simple, practical, and the production efficiency of steel-casting can be improved, and is suitble to promote.
Description
Technical field
The present invention relates to process for making shell technical field more particularly to a kind of steel-casting precoated sand process for making shell.
Background technique
Steel-casting is the casting being cooled and shaped after molten steel of casting using mold, and the mold of existing steel-casting is mostly
Wax-pattern technique shell, and wax-pattern technique shell is easy to produce stomata, and the heated scarce capacity of wax-pattern technique shell, is easy pouring
Rupture is generated during note, the yields of steel-casting is influenced, for this purpose, we have proposed a kind of steel-casting precoated sand shell works
Skill.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of steel-casting precoated sand proposed
Process for making shell.
To achieve the goals above, present invention employs following technical solutions:
Design a kind of steel-casting precoated sand process for making shell, the process for making shell the following steps are included:
S1, natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are chosen as raw material, and chooses lubricant
With high temperature resistant additive as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature
To 180-200 degree, it is mixed into thermoplastic phenolic resin in the ratio of 15-20:1, after being mixed into thermoplastic phenolic resin, by a temperature of
It is adjusted to 120-150 degree, continuing stirring mixes it uniformly.
S3, in the ratio of 30-35:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make
It is uniformly.
S4, the raw material mixed is imported in core shooter, mold is heated to 420-450 degree, by core shooter by raw material
Inject mold in, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 60-80 degree, mold is opened and takes out overlay film arenaceous shell, it will
Overlay film arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
Preferably, the average thickness of the overlay film arenaceous shell is 12mm-15mm.
Preferably, the crossover position of the overlay film arenaceous shell with a thickness of 15mm-20mm.
Preferably, reconditioning is carried out using milling tools on the surface layer of the overlay film arenaceous shell, keeps the surface layer of overlay film arenaceous shell smooth,
Remove defect.
Preferably, the surface layer of the overlay film arenaceous shell is coated with high-temperaure coating.
A kind of steel-casting precoated sand process for making shell proposed by the present invention, beneficial effect are: present invention process, and operation is just
Victory improves the high temperature resistant function of mold, prevents mold breakdown, can greatly improve the yields of steel-casting, can accelerate
The molding of steel-casting, improves production efficiency.
Specific embodiment
It is clearly and completely described below in conjunction with the technical solution in the embodiment of the present invention, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.
Implementation column 1
A kind of steel-casting precoated sand process for making shell, process for making shell the following steps are included:
S1, natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are chosen as raw material, and chooses lubricant
With high temperature resistant additive as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature
To after 200 degree, it is mixed into thermoplastic phenolic resin in the ratio of 15:1, after being mixed into thermoplastic phenolic resin, temperature is adjusted downward to 150
Degree, continuing stirring mixes it uniformly.
S3, in the ratio of 30:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make it
Uniformly.
S4, the raw material mixed is imported in core shooter, mold is heated to 450 degree, is fed injection by core shooter
In mold, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 80 degree, mold is opened and takes out overlay film arenaceous shell, will be covered
Film arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
The average thickness of overlay film arenaceous shell is 15mm.
The crossover position of overlay film arenaceous shell with a thickness of 20mm.
Reconditioning is carried out using milling tools on the surface layer of overlay film arenaceous shell, keeps the surface layer of overlay film arenaceous shell smooth, removes defect.
The surface layer of overlay film arenaceous shell is coated with high-temperaure coating.
Implementation column 2
A kind of steel-casting precoated sand process for making shell, process for making shell the following steps are included:
S1, natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are chosen as raw material, and chooses lubricant
With high temperature resistant additive as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature
To 180 degree, it is mixed into thermoplastic phenolic resin in the ratio of 20:1, after being mixed into thermoplastic phenolic resin, temperature is adjusted downward to 120
Degree, continuing stirring mixes it uniformly.
S3, in the ratio of 35:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make it
Uniformly.
S4, the raw material mixed is imported in core shooter, mold is heated to 420 degree, is fed injection by core shooter
In mold, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 60 degree, mold is opened and takes out overlay film arenaceous shell, will be covered
Film arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
The average thickness of overlay film arenaceous shell is 12mm.
The crossover position of overlay film arenaceous shell with a thickness of 15mm.
Reconditioning is carried out using milling tools on the surface layer of overlay film arenaceous shell, keeps the surface layer of overlay film arenaceous shell smooth, removes defect.
The surface layer of overlay film arenaceous shell is coated with high-temperaure coating.
Implementation column 3
A kind of steel-casting precoated sand process for making shell, process for making shell the following steps are included:
S1, natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are chosen as raw material, and chooses lubricant
With high temperature resistant additive as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature
To 180 degree, it is mixed into thermoplastic phenolic resin in the ratio of 15:1, after being mixed into thermoplastic phenolic resin, temperature is adjusted downward to 150
Degree, continuing stirring mixes it uniformly.
S3, in the ratio of 30:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make it
Uniformly.
S4, the raw material mixed is imported in core shooter, mold is heated to 450 degree, is fed injection by core shooter
In mold, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 80 degree, mold is opened and takes out overlay film arenaceous shell, will be covered
Film arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
The average thickness of overlay film arenaceous shell is 12mm.
The crossover position of overlay film arenaceous shell with a thickness of 15mm.
Reconditioning is carried out using milling tools on the surface layer of overlay film arenaceous shell, keeps the surface layer of overlay film arenaceous shell smooth, removes defect.
The surface layer of overlay film arenaceous shell is coated with high-temperaure coating.
Implementation column 4
A kind of steel-casting precoated sand process for making shell, process for making shell the following steps are included:
S1, natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are chosen as raw material, and chooses lubricant
With high temperature resistant additive as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature
To 180 degree, it is mixed into thermoplastic phenolic resin in the ratio of 15:1, after being mixed into thermoplastic phenolic resin, temperature is adjusted downward to 150
Degree, continuing stirring mixes it uniformly.
S3, in the ratio of 30:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make it
Uniformly.
S4, the raw material mixed is imported in core shooter, mold is heated to 450 degree, is fed injection by core shooter
In mold, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 80 degree, mold is opened and takes out overlay film arenaceous shell, will be covered
Film arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
The average thickness of overlay film arenaceous shell is 15mm.
The crossover position of overlay film arenaceous shell with a thickness of 20mm.
Reconditioning is carried out using milling tools on the surface layer of overlay film arenaceous shell, keeps the surface layer of overlay film arenaceous shell smooth, removes defect.
The surface layer of overlay film arenaceous shell is coated with high-temperaure coating.
There is stronger high-temperature stability according to the overlay film arenaceous shell of implementation column S1-S5 preparation, the casting of higher temperature can be born
Steel casting, and intensity with higher, are not easily broken, and surface is smooth, not easy to stick viscous, can be improved the yields of steel-casting.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of steel-casting is with precoated sand shell and technique, which is characterized in that the process for making shell the following steps are included:
S1, choose natural siliceous sand, thermoplastic phenolic resin, methenamine and reinforcing agent are raw material, and choose lubricant and resistance to
High temperature additive is as auxiliary material.
S2, natural siliceous sand is screened, natural siliceous sand is poured into sand mixer after screening, and heated, heating temperature is extremely
After 180-200 degree, it is mixed into thermoplastic phenolic resin in the ratio of 15-20:1, after being mixed into thermoplastic phenolic resin, temperature is lowered
To 120-150 degree, continuing stirring mixes it uniformly.
S3, in the ratio of 30-35:1 it is mixed into methenamine and reinforcing agent during stirring, and continue stirring to make it
It is even.
S4, the raw material mixed is imported in core shooter, mold is heated to 420-450 degree, is fed injection by core shooter
In mold, mold is subjected to vibration operation, eliminates the bubble of mould inside, make raw material and importing mold in.
S5, it is placed after taking out mold, mold is made to be naturally cooling to 60-80 degree, mold is opened and takes out overlay film arenaceous shell, by overlay film
Arenaceous shell is put into hot-air seasoning in drying unit, forms naturally after making it dry, as molding overlay film arenaceous shell.
2. a kind of steel-casting precoated sand process for making shell according to claim 1, which is characterized in that the overlay film arenaceous shell
Average thickness is 12mm-15mm.
3. a kind of steel-casting precoated sand process for making shell according to claim 1, which is characterized in that the overlay film arenaceous shell
Crossover position with a thickness of 15mm-20mm.
4. a kind of steel-casting precoated sand process for making shell according to claim 1, which is characterized in that in the overlay film arenaceous shell
Surface layer using milling tools carry out reconditioning, keep the surface layer of overlay film arenaceous shell smooth, remove defect.
5. a kind of steel-casting precoated sand process for making shell according to claim 1, which is characterized in that the overlay film arenaceous shell
Surface layer is coated with high-temperaure coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910223109.4A CN109746383A (en) | 2019-03-22 | 2019-03-22 | A kind of steel-casting precoated sand process for making shell |
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| CN201910223109.4A CN109746383A (en) | 2019-03-22 | 2019-03-22 | A kind of steel-casting precoated sand process for making shell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110449546A (en) * | 2019-09-20 | 2019-11-15 | 重庆长江造型材料（集团）股份有限公司 | A kind of preparation process of riser precoated sand |
| CN110479953A (en) * | 2019-09-20 | 2019-11-22 | 重庆长江造型材料（集团）股份有限公司 | A kind of riser precoated sand |
| CN111673997A (en) * | 2020-06-22 | 2020-09-18 | 惠州市旭辉塑胶科技有限公司 | Injection molding process of plastic material air purifier shell |
| CN112756550A (en) * | 2020-12-09 | 2021-05-07 | 南通加合机械科技有限公司 | Precoated sand casting process for large box parts |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449546A (en) * | 2019-09-20 | 2019-11-15 | 重庆长江造型材料（集团）股份有限公司 | A kind of preparation process of riser precoated sand |
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| CN111673997A (en) * | 2020-06-22 | 2020-09-18 | 惠州市旭辉塑胶科技有限公司 | Injection molding process of plastic material air purifier shell |
| CN112756550A (en) * | 2020-12-09 | 2021-05-07 | 南通加合机械科技有限公司 | Precoated sand casting process for large box parts |
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