CN107774881A - Easy gas permeability precoated sand - Google Patents
Easy gas permeability precoated sand Download PDFInfo
- Publication number
- CN107774881A CN107774881A CN201610744539.7A CN201610744539A CN107774881A CN 107774881 A CN107774881 A CN 107774881A CN 201610744539 A CN201610744539 A CN 201610744539A CN 107774881 A CN107774881 A CN 107774881A
- Authority
- CN
- China
- Prior art keywords
- sand
- precoated sand
- gas permeability
- mixed grind
- precoated
- 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
Links
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
- 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
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of easily gas permeability precoated sand, key step includes that mulling, heating, mixed grind, cooling, charging, mixed grind be broken, screening obtains precoated sand.Resistance to water soak of the present invention is preferably, roughness is smaller, is not easy in casting scab.
Description
Technical field
The invention belongs to casting technology field, and in particular to a kind of easily gas permeability precoated sand.
Background technology
Precoated sand refers to the molding sand or core sand for being covered with one layer of hard resin film before moulding on sand grain surface.Have cold process and
Heat two kinds of coating techniques of hair：Cold process is dissolved resin with ethanol, and methenamine is added during mulling, makes the two bag
Sand grain surface is overlayed on, ethanol volatilization, obtains precoated sand；Sand is preheating to certain temperature by hot method, adds resin to make its melting, and stirring makes tree
Fat is coated on sand grain surface, adds the methenamine aqueous solution and lubricant, cools down, crushes, sieving and to obtain precoated sand.For steel-casting,
Ironcasting.Because precoated sand has, intensity is high, gas forming amount is low, production casting dimension accuracy height, any surface finish, is easy to preservation etc. excellent
Point, in recent years using increasingly extensive.Precoated sand of the prior art there is heat resistance is poor, roughness is larger, easily in casting
The defects of upper scab and problem.
The content of the invention
In order to overcome above-mentioned technical problem existing for prior art, it is an object of the present invention to provide a kind of easily saturating
Gas precoated sand, resistance to water soak is preferably, roughness is smaller, is not easy the scab on casting.
Easily gas permeability precoated sand provided by the invention, comprises the following steps：
（1）100 parts of roughing sand are put into blade mixer, are heated to 170-280 DEG C；
（2）13-17 part phenolic resin mixed grind times 47-58S is put into roughing sand；
（3）When roughing sand temperature is reduced to 110-120 DEG C, 5-8 part curing agent, mixed grind 10S are added；
（4）Add 6-9 parts lubricant and 15-19 part additive mixed grinds 46-55S；
（5）When roughing sand is down to below 80 DEG C, broken, screening obtains precoated sand.
Easily gas permeability precoated sand, its advantage provided by the invention are that this precoated sand is removed with Conventional coverlay film sand
Outside performance, also have and delay raising rate 4-5S, performance caused by suppression nitrogen, can effectively reduce casting and produce nitrogen pore, greatly
The big yield rate for improving austenitic iron casting.
Embodiment
With reference to one embodiment, easily gas permeability precoated sand provided by the invention is described in detail.
Embodiment
The easy gas permeability precoated sand of the present embodiment, comprises the following steps：
（1）100 parts of roughing sand are put into blade mixer, are heated to 190 DEG C；
（2）17 parts of phenolic resin mixed grind time 58S are put into roughing sand；
（3）When roughing sand temperature is reduced to 110 DEG C, 8 parts of curing agent, mixed grind 10S are added；
（4）Add 9 parts of lubricants and 15 parts of additive mixed grind 55S；
（5）When roughing sand is down to 78 DEG C, broken, screening obtains precoated sand.
Claims (1)
- A kind of 1. easily gas permeability precoated sand, it is characterised in that：Comprise the following steps：（1）100 parts of roughing sand are put into blade mixer, are heated to 170-280 DEG C；（2）13-17 part phenolic resin mixed grind times 47-58S is put into roughing sand；（3）When roughing sand temperature is reduced to 110-120 DEG C, 5-8 part curing agent, mixed grind 10S are added；（4）Add 6-9 parts lubricant and 15-19 part additive mixed grinds 46-55S；（5）When roughing sand is down to below 80 DEG C, broken, screening obtains precoated sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744539.7A CN107774881A (en) | 2016-08-29 | 2016-08-29 | Easy gas permeability precoated sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744539.7A CN107774881A (en) | 2016-08-29 | 2016-08-29 | Easy gas permeability precoated sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107774881A true CN107774881A (en) | 2018-03-09 |
Family
ID=61441084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610744539.7A Pending CN107774881A (en) | 2016-08-29 | 2016-08-29 | Easy gas permeability precoated sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107774881A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526386A (en) * | 2018-05-09 | 2018-09-14 | 西峡县众德汽车部件有限公司 | Spherical silica sand and ceramic sand compound film laminating sand and preparation method thereof |
-
2016
- 2016-08-29 CN CN201610744539.7A patent/CN107774881A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526386A (en) * | 2018-05-09 | 2018-09-14 | 西峡县众德汽车部件有限公司 | Spherical silica sand and ceramic sand compound film laminating sand and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103920852B (en) | A kind of precision casting process of large foundry goods | |
| CN104325065B (en) | A kind of precoated sand and preparation method thereof | |
| CN103586401A (en) | Precoated sand | |
| CN101934346A (en) | Pre-coated sand | |
| CN104226914A (en) | Foundry technology of flange | |
| CN104226888B (en) | A kind of easy defeated and dispersed precoated sand and preparation method thereof | |
| CN103231008A (en) | High temperature resistance precoated sand | |
| CN101927318A (en) | High strength precoated sand | |
| CN102896280A (en) | Casting method of automobile axle housing | |
| CN104148583A (en) | Investment casting method | |
| CN104785709A (en) | Precoated sand for casting and preparation method thereof | |
| CN104190854A (en) | Regenerated pre-coated sand and preparation method thereof | |
| CN101941042A (en) | Easily collapsed coated sand | |
| CN103231010A (en) | Easy-collapsibility type precoated sand | |
| CN103056300A (en) | Production process for high-strength sand moulds and cores added with novel chill | |
| CN104308086A (en) | Large-sized hollow urea core for investment casting and manufacturing process of large-sized hollow urea core | |
| CN103600024A (en) | Precoated sand mixing process | |
| CN107774881A (en) | Easy gas permeability precoated sand | |
| CN107737880A (en) | A kind of Water-soluble ceramic core and preparation method thereof | |
| CN104690213A (en) | Coated sand with cracking resistance, smell removal and less adhesion to sand and preparation method thereof | |
| CN103341594B (en) | A kind of casting method of brake shell | |
| CN107774882A (en) | A kind of Foundry Coated Sand of forming low bulk and preparation method thereof | |
| CN104493074A (en) | Method for preparing zircon-sand pre-coated sand | |
| CN105312502B (en) | A kind of preparation method of heat-resistance stainless steel | |
| CN107030256A (en) | A kind of casting method of metal implements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180309 |
|
| WD01 | Invention patent application deemed withdrawn after publication |