CN101927318A - High strength precoated sand - Google Patents
High strength precoated sand Download PDFInfo
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- CN101927318A CN101927318A CN2010102713838A CN201010271383A CN101927318A CN 101927318 A CN101927318 A CN 101927318A CN 2010102713838 A CN2010102713838 A CN 2010102713838A CN 201010271383 A CN201010271383 A CN 201010271383A CN 101927318 A CN101927318 A CN 101927318A
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Abstract
The invention discloses high strength precoated sand, comprising the components of raw sand, a binder, a firming agent, a coupling agent and a lubricant, wherein the dosage of the firming agent is 60-70% of that of the binder; the dosage of the coupling agent is 1-3% of that of the binder; the dosage of the binder is 5-8% of that of the raw sand; the dosage of the lubricant is 1-2% of that of the raw sand; the binder comprises the following ingredients in parts by weight: 60-70 parts of phenolic resin, 10-30 parts of high alumina bauxite powder and 10-20 parts of ferric oxide powder; and the firming agent comprises the following ingredients in parts by weight: 70-80 parts of hexamine, 15-25 parts of potassium nitrate and the balance water. The precoated sand of the invention has higher strength and stronger toughness.
Description
Technical field
The present invention relates to a kind of precoated sand, relate in particular to a kind of high strength type precoated sand, specifically be applicable to the production of complicated foundry goods of structure.
Background technology
Precoated sand is meant preceding molding sand or the core sand that is covered with one deck hard resin film on sand grain surface of moulding.Two kinds of coating techniques of cold process and Re Fa are arranged: cold process with resin dissolves, and adds methenamine with ethanol in the mulling process, make the two be coated on sand grain surface, the ethanol volatilization, precoated sand; Hot method is preheating to uniform temperature to sand, adds resin and makes its fusion, stirs to make resin-coating at sand grain surface, adds the methenamine aqueous solution and lubricant, cooling, broken, sieve precoated sand.Be used for steel-casting, ironcasting.Intensity height, gas forming amount are low because precoated sand has, production casting dimension accuracy height, any surface finish, be convenient to advantage such as preservation, use increasingly extensive in recent years.
The Chinese patent publication number is CN101195148A, it is the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand that the patent of invention that Chinese patent open day was discloses a kind of, it is characterized in that it is the axis that there is boss a centre that is made of sand mold under sand mold on the precoated sand and the precoated sand on the other side.Manufacture method is: (1) at high temperature regenerates antiquated sand; (2) produce reclaimed sand; (3) be that roughing sand is produced precoated sand with reclaimed sand; (4) with mold heated to 290～310 ℃; (5) precoated sand is blown in the camshaft sand mold mould by compressed air heated curing molding 110～130 seconds; (6) promptly obtain complete camshaft sand mold after upper and lower two pastings of core.Though this invention can improve surface quality of continuous castings, improve liquidity, reduces the casting wasted product rate, its mechanical performance is relatively poor, is mainly reflected in insufficient strength, toughness is relatively poor, breaks easily when the foundry goods of cast structure more complicated, causes the casting accident.
Summary of the invention
The objective of the invention is to overcome relatively poor defective and the problem of insufficient strength, toughness that exists in the prior art, provide that a kind of intensity is big, toughness high strength type precoated sand preferably.
For realizing above purpose, technical solution of the present invention is: a kind of high strength type precoated sand comprises roughing sand, binding agent, curing agent and coupling agent; The consumption of described curing agent is the 60-70% of binding agent consumption, and the consumption of coupling agent is the 1-3% of binding agent consumption, and the consumption of binding agent is the 5-8% of roughing sand consumption; Also comprise lubricant in the described wet film coating sand, the consumption of this lubricant is the 1-2% of roughing sand consumption.
The consumption of described curing agent is 65% of a binding agent consumption, and the consumption of coupling agent is 2% of a binding agent consumption, and the consumption of binding agent is 6.5% of a roughing sand consumption, and the consumption of lubricant is 1.5% of a roughing sand consumption.
The constituent of described binding agent and weight portion ratio thereof are: phenolic resins 60-70, alumine powder 10-30, brown iron oxide 10-20.
The constituent of described binding agent and weight portion ratio thereof are: phenolic resins 65, alumine powder 20, brown iron oxide 15.
The constituent of described curing agent and weight portion ratio thereof are: hexa 70-80, and potassium nitrate 15-25, all the other are water.
The constituent of described curing agent and weight portion ratio thereof are: hexa 75, and potassium nitrate 20, all the other are water.
Compared with prior art, beneficial effect of the present invention is:
1, because a kind of high strength type precoated sand of the present invention comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, the consumption of curing agent is the 60-70% of binding agent consumption, the consumption of coupling agent is the 1-3% of binding agent consumption, the consumption of binding agent is the 5-8% of roughing sand consumption, the consumption of lubricant is the 1-2% of roughing sand consumption, and the constituent of binding agent and weight portion ratio thereof are: phenolic resins 60-70, alumine powder 10-30, brown iron oxide 10-20, wherein, alumine powder that comprises in the binding agent and brown iron oxide can be on the bases that does not influence the phenolic resins effect, improve the bonding and the invigoration effect of binding agent, and then the density and the intensity of raising precoated sand, improve its mechanical performance, make it have higher strength and toughness.Therefore not only intensity is bigger in the present invention, and toughness is better.
2, constituent and the weight portion ratio thereof owing to curing agent in a kind of high strength type precoated sand of the present invention is: hexa 70-80, potassium nitrate 15-25, all the other are water, in this kind curing agent except using hexa commonly used, potassium nitrate also has been mixed, this kind design can improve the hardening effect of precoated sand, improves its mechanical performance, the intensity of increase precoated sand that especially can be bigger.Therefore intensity of the present invention is bigger.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the specific embodiment
A kind of high strength type precoated sand, comprise roughing sand, binding agent, curing agent and coupling agent, wherein, the consumption of curing agent is the 60-70% of binding agent consumption, the consumption of coupling agent is the 1-3% of binding agent consumption, the consumption of binding agent is the 5-8% of roughing sand consumption, comprises also in the wet film coating sand that lubricant, the consumption of this lubricant are the 1-2% of roughing sand consumption.
The consumption of preferred consolidation agent is 65% of a binding agent consumption, and the consumption of coupling agent is 2% of a binding agent consumption, and the consumption of binding agent is 6.5% of a roughing sand consumption, and the consumption of lubricant is 1.5% of a roughing sand consumption.
The constituent of preferred binder and weight portion ratio thereof are: phenolic resins 60-70, alumine powder 10-30, brown iron oxide 10-20, further the constituent and the weight portion ratio thereof of preferred binder are: phenolic resins 65, alumine powder 20, brown iron oxide 15.
The constituent of preferred consolidation agent and weight portion ratio thereof are: hexa 70-80, and potassium nitrate 15-25, all the other are water, further the constituent and the weight portion ratio thereof of preferred consolidation agent are: hexa 75, potassium nitrate 20, all the other are water.
Embodiment 1:
A kind of high strength type precoated sand, comprise roughing sand, binding agent, curing agent, coupling agent and lubricant, the consumption of curing agent is 70% of a binding agent consumption, and the consumption of coupling agent is 1% of a binding agent consumption, the consumption of binding agent is 5% of a roughing sand consumption, and the consumption of lubricant is 2% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: phenolic resins 60, alumine powder 30, brown iron oxide 20; The constituent of curing agent and weight portion ratio thereof are: hexa 70, and potassium nitrate 25, all the other are water.
Embodiment 2:
A kind of high strength type precoated sand, comprise roughing sand, binding agent, curing agent, coupling agent and lubricant, the consumption of curing agent is 70% of a binding agent consumption, and the consumption of coupling agent is 3% of a binding agent consumption, the consumption of binding agent is 8% of a roughing sand consumption, and the consumption of lubricant is 1% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: phenolic resins 70, alumine powder 10, brown iron oxide 10; The constituent of curing agent and weight portion ratio thereof are: hexa 80, and potassium nitrate 15, all the other are water.
Embodiment 3:
A kind of high strength type precoated sand, comprise roughing sand, binding agent, curing agent, coupling agent and lubricant, the consumption of curing agent is 65% of a binding agent consumption, the consumption of coupling agent is 5% of a binding agent consumption, the consumption of binding agent is 6.5% of a roughing sand consumption, and the consumption of lubricant is 1.5% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: phenolic resins 65, alumine powder 20, brown iron oxide 15; The constituent of curing agent and weight portion ratio thereof are: hexa 75, and potassium nitrate 20, all the other are water.
Therefore the present invention not only intensity is bigger, and toughness is stronger.
The above only is a better embodiment of the present invention; protection scope of the present invention is not exceeded with above-mentioned embodiment; as long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (6)
1. high strength type precoated sand, comprise roughing sand, binding agent, curing agent and coupling agent, it is characterized in that: the consumption of described curing agent is the 60-70% of binding agent consumption, and the consumption of coupling agent is the 1-3% of binding agent consumption, and the consumption of binding agent is the 5-8% of roughing sand consumption; Also comprise lubricant in the described wet film coating sand, the consumption of this lubricant is the 1-2% of roughing sand consumption.
2. a kind of high strength type precoated sand according to claim 1, it is characterized in that: the consumption of described curing agent is 65% of a binding agent consumption, the consumption of coupling agent is 2% of a binding agent consumption, and the consumption of binding agent is 6.5% of a roughing sand consumption, and the consumption of lubricant is 1.5% of a roughing sand consumption.
3. a kind of high strength type precoated sand according to claim 1 and 2 is characterized in that: the constituent of described binding agent and weight portion ratio thereof are: phenolic resins 60-70, alumine powder 10-30, brown iron oxide 10-20.
4. a kind of high strength type precoated sand according to claim 3 is characterized in that: the constituent of described binding agent and weight portion ratio thereof are: phenolic resins 65, alumine powder 20, brown iron oxide 15.
5. a kind of high strength type precoated sand according to claim 3 is characterized in that: the constituent of described curing agent and weight portion ratio thereof are: hexa 70-80, and potassium nitrate 15-25, all the other are water.
6. a kind of high strength type precoated sand according to claim 5 is characterized in that: the constituent of described curing agent and weight portion ratio thereof are: hexa 75, and potassium nitrate 20, all the other are water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102713838A CN101927318A (en) | 2010-09-03 | 2010-09-03 | High strength precoated sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102713838A CN101927318A (en) | 2010-09-03 | 2010-09-03 | High strength precoated sand |
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| CN101927318A true CN101927318A (en) | 2010-12-29 |
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| CN2010102713838A Pending CN101927318A (en) | 2010-09-03 | 2010-09-03 | High strength precoated sand |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069140A (en) * | 2011-02-16 | 2011-05-25 | 西峡县众德汽车部件有限公司 | Novel film coating sand |
| CN102503201A (en) * | 2011-10-21 | 2012-06-20 | 李国辉 | Pre-coated sand, preparation method thereof and composite water permeable brick |
| CN103231008A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | High temperature resistance precoated sand |
| CN103231010A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Easy-collapsibility type precoated sand |
| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
| CN103272998A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Low-expansion precoated sand |
| CN103586401A (en) * | 2013-11-27 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Precoated sand |
| CN104014718A (en) * | 2014-06-18 | 2014-09-03 | 承德北雁铸造材料有限公司 | Shelling resistant pre-coated sand and preparation method thereof |
| CN104668443A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Casting precoated sand added with titanium dioxide and preparation method of casting precoated sand |
| CN103600022B (en) * | 2013-11-25 | 2015-06-24 | 柳州市柳晶科技有限公司 | Precoated sand capable of preventing nozzle from leaking sand |
| CN106001388A (en) * | 2016-07-29 | 2016-10-12 | 无锡市三峰仪器设备有限公司 | High-temperature-resistant coated sand for casting instruments |
| CN106077426A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of instrument Foundry Coated Sand of resistance to water soak |
| CN107755624A (en) * | 2016-08-23 | 2018-03-06 | 抚顺市盛鑫覆膜砂制造有限公司 | A kind of precoated sand |
| CN107913976A (en) * | 2016-10-09 | 2018-04-17 | 抚顺市鑫盛挖掘机配件制造有限公司 | Precoated sand shell production various specifications crane, the technique of crawler of excavator plate |
-
2010
- 2010-09-03 CN CN2010102713838A patent/CN101927318A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069140B (en) * | 2011-02-16 | 2012-03-28 | 西峡县众德汽车部件有限公司 | Novel film coating sand |
| CN102069140A (en) * | 2011-02-16 | 2011-05-25 | 西峡县众德汽车部件有限公司 | Novel film coating sand |
| CN102503201A (en) * | 2011-10-21 | 2012-06-20 | 李国辉 | Pre-coated sand, preparation method thereof and composite water permeable brick |
| CN102503201B (en) * | 2011-10-21 | 2013-04-24 | 李国辉 | Pre-coated sand, preparation method thereof and composite water permeable brick |
| CN103231008A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | High temperature resistance precoated sand |
| CN103231010A (en) * | 2013-04-16 | 2013-08-07 | 繁昌县恒鑫汽车零部件有限公司 | Easy-collapsibility type precoated sand |
| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
| CN103272998A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Low-expansion precoated sand |
| CN103600022B (en) * | 2013-11-25 | 2015-06-24 | 柳州市柳晶科技有限公司 | Precoated sand capable of preventing nozzle from leaking sand |
| CN103586401A (en) * | 2013-11-27 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Precoated sand |
| CN104014718A (en) * | 2014-06-18 | 2014-09-03 | 承德北雁铸造材料有限公司 | Shelling resistant pre-coated sand and preparation method thereof |
| CN104014718B (en) * | 2014-06-18 | 2016-08-17 | 承德北雁铸造材料有限公司 | A kind of precoated sand of anti-shelling and preparation method thereof |
| CN104668443A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Casting precoated sand added with titanium dioxide and preparation method of casting precoated sand |
| CN106001388A (en) * | 2016-07-29 | 2016-10-12 | 无锡市三峰仪器设备有限公司 | High-temperature-resistant coated sand for casting instruments |
| CN106077426A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of instrument Foundry Coated Sand of resistance to water soak |
| CN107755624A (en) * | 2016-08-23 | 2018-03-06 | 抚顺市盛鑫覆膜砂制造有限公司 | A kind of precoated sand |
| CN107913976A (en) * | 2016-10-09 | 2018-04-17 | 抚顺市鑫盛挖掘机配件制造有限公司 | Precoated sand shell production various specifications crane, the technique of crawler of excavator plate |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101229 |