CN101966556A - Urethane resin self-hardening sand - Google Patents
Urethane resin self-hardening sand Download PDFInfo
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- CN101966556A CN101966556A CN 201010271410 CN201010271410A CN101966556A CN 101966556 A CN101966556 A CN 101966556A CN 201010271410 CN201010271410 CN 201010271410 CN 201010271410 A CN201010271410 A CN 201010271410A CN 101966556 A CN101966556 A CN 101966556A
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Abstract
The invention relates to urethane resin self-hardening sand which comprises raw sand, a bonding agent, a curing agent, a coupling agent and a lubricating agent, wherein the raw sand comprises the following components in parts by weight: 80-90 parts of return sand, 5-15 parts of organic ester, 2-6 parts of sodium silicate and balance of water, wherein the organic ester is n-propyl acetate; the dosage of the curing agent is 30-40% of the dosage of the bonding agent, the dosage of the coupling agent is 0.1-0.4% of the dosage of the bonding agent, the dosage of the bonding agent is 1-5% of the dosage of the raw sand, and the dosage of the lubricating agent is 0.2-0.4% of the dosage of the raw sand; and the bonding agent comprises the following components in parts by weight: 60-70 parts of urethane resin, 20-30 parts of phenolic resin, 5-15 parts of acrylic acid and balance of water. The urethane resin self-hardening sand of the invention not only has better heat resistance but also has stronger air permeability.
Description
Technical field
The present invention relates to a kind of self-hardening sand, relate in particular to a kind of urethane resin self-hardening sand, specifically be applicable to the resin self-setting sand that the alloy sand mold casting is adopted.
Background technology
Resin self-setting sand is generally formed by mixed preparing such as silica sand, resin and curing agents.Resin commonly used has furane resins, resol and urethane resin.The sand mold intensity height made from this molding sand, size is accurate, collapsibility good, energy resource consumption is few, can be used for the production of cast steel, cast iron and cast nonferrous alloy foundry goods, the surface quality of foundry goods and dimensional accuracy height.Resin self-setting sand is a kind of rising moulding sand.
The Chinese patent Granted publication number is CN1216703C, Granted publication day is that the patent of invention on August 31st, 2005 discloses a kind of self-hardening sand that belongs to casting industry, it is a kind of environment-friendly type self-hardening sand, pollution-free, collapsibility is good, tolerance is high, gas-forming property is little, and the foundry goods physical dimension is accurate, and, with low cost, method of operating is easy, can be widely used in whole casting industries such as automobile spare, radiator, bent axle, lathe, lathe.Though the self-hardening sand of this Invention Announce is pollution-free, collapsibility good, tolerance is high, its hear resistance is relatively poor, during use, break easily, and gas permeability a little less than, easily cause the core air spots.
Summary of the invention
The objective of the invention is to overcome the hear resistance that exists in the prior art is relatively poor, gas permeability is more weak defective and problem, the urethane resin self-hardening sand that a kind of hear resistance is better, gas permeability is stronger is provided.
For realizing above purpose, technical solution of the present invention is: a kind of urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 80-90, organic ester 5-15, sodium metasilicate 2-6, all the other are water; The consumption of described curing agent is the 30-40% of binding agent consumption, and the consumption of coupling agent is the 0.1-0.4% of binding agent consumption, and the consumption of binding agent is the 1-5% of roughing sand consumption, and the consumption of lubricant is the 0.2-0.4% of roughing sand consumption.
The constituent of described roughing sand and weight portion ratio thereof are: return sand 85, and organic ester 10, sodium metasilicate 4, all the other are water; The consumption of described curing agent is 35% of a binding agent consumption, and the consumption of coupling agent is 0.25% of a binding agent consumption, and the consumption of binding agent is 3% of a roughing sand consumption, and the consumption of lubricant is 0.3% of a roughing sand consumption.
The constituent of described binding agent and weight portion ratio thereof are: urethane resin 60-70, and phenolic resins 20-30, acrylic acid 5-15, all the other are water.
The constituent of described binding agent and weight portion ratio thereof are: urethane resin 65, and phenolic resins 25, acrylic acid 10, all the other are water
Described organic ester is a n-propyl acetate.
Compared with prior art, beneficial effect of the present invention is:
1, because a kind of urethane resin self-hardening sand of the present invention comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 80-90, and organic ester 5-15, sodium metasilicate 2-6, all the other are water; The consumption of described curing agent is the 30-40% of binding agent consumption, the consumption of coupling agent is the 0.1-0.4% of binding agent consumption, the consumption of binding agent is the 1-5% of roughing sand consumption, the consumption of lubricant is the 0.2-0.4% of roughing sand consumption, roughing sand recycling sand in a large number in this design, the saving production cost, and with return sand with after organic ester, sodium metasilicate mix, can be for self-hardening sand provide stronger gas permeability and hear resistance, thus the appearance of core out-of-flatness and the situation of breaking avoided.Therefore not only gas permeability is better in the present invention, and hear resistance is stronger.
2, constituent and the weight portion ratio thereof owing to binding agent in a kind of urethane resin self-hardening sand of the present invention is: urethane resin 60-70, phenolic resins 20-30, acrylic acid 5-15, all the other are water, not only can provide stronger caking property for self-hardening sand, and can match with the organic ester in the roughing sand, promote the realization of self-hardening sand hear resistance and gas permeability.Therefore not only hear resistance is stronger in the present invention, and gas permeability is better.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the specific embodiment
A kind of urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, and wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 80-90, and organic ester 5-15, sodium metasilicate 2-6, all the other are water; The consumption of described curing agent is the 30-40% of binding agent consumption, and the consumption of coupling agent is the 0.1-0.4% of binding agent consumption, and the consumption of binding agent is the 1-5% of roughing sand consumption, and the consumption of lubricant is the 0.2-0.4% of roughing sand consumption.
The constituent and the weight portion ratio thereof of preferred roughing sand are: return sand 85, and organic ester 10, sodium metasilicate 4, all the other are water; The consumption of described curing agent is 35% of a binding agent consumption, and the consumption of coupling agent is 0.25% of a binding agent consumption, and the consumption of binding agent is 3% of a roughing sand consumption, and the consumption of lubricant is 0.3% of a roughing sand consumption.
The constituent of preferred binder and weight portion ratio thereof are: urethane resin 60-70, phenolic resins 20-30, acrylic acid 5-15, all the other are water, and further the constituent and the weight portion ratio thereof of preferred binder are: urethane resin 65, phenolic resins 25, acrylic acid 10, all the other are water
Preferred organic ester is a n-propyl acetate.
Embodiment 1:
A kind of urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, and wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 80, and organic ester 15, sodium metasilicate 6, all the other are water, and organic ester is a n-propyl acetate; The consumption of curing agent is 40% of a binding agent consumption, and the consumption of coupling agent is 0.1% of a binding agent consumption, and the consumption of binding agent is 5% of a roughing sand consumption, and the consumption of lubricant is 0.2% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: urethane resin 70, and phenolic resins 20, acrylic acid 5, all the other are water.
Embodiment 2:
A kind of urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, and wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 90, and organic ester 5, sodium metasilicate 2, all the other are water, and organic ester is a n-propyl acetate; The consumption of curing agent is 30% of a binding agent consumption, and the consumption of coupling agent is 0.4% of a binding agent consumption, and the consumption of binding agent is 1% of a roughing sand consumption, and the consumption of lubricant is 0.4% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: urethane resin 60, and phenolic resins 30, acrylic acid 15, all the other are water.
Embodiment 3:
A kind of urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, and wherein, the constituent of roughing sand and weight portion ratio thereof are: return sand 85, and organic ester 10, sodium metasilicate 4, all the other are water, and organic ester is a n-propyl acetate; The consumption of curing agent is 35% of a binding agent consumption, and the consumption of coupling agent is 0.25% of a binding agent consumption, and the consumption of binding agent is 2.5% of a roughing sand consumption, and the consumption of lubricant is 0.3% of a roughing sand consumption; The constituent of binding agent and weight portion ratio thereof are: urethane resin 65, and phenolic resins 25, acrylic acid 10, all the other are water.
Therefore the present invention not only hear resistance is better, and gas permeability 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 (5)
1. a urethane resin self-hardening sand comprises roughing sand, binding agent, curing agent, coupling agent and lubricant, it is characterized in that: the constituent of described roughing sand and weight portion ratio thereof are: return sand 80-90, and organic ester 5-15, sodium metasilicate 2-6, all the other are water; The consumption of described curing agent is the 30-40% of binding agent consumption, and the consumption of coupling agent is the 0.1-0.4% of binding agent consumption, and the consumption of binding agent is the 1-5% of roughing sand consumption, and the consumption of lubricant is the 0.2-0.4% of roughing sand consumption.
2. a kind of urethane resin self-hardening sand according to claim 1 is characterized in that: the constituent of described roughing sand and weight portion ratio thereof are: return sand 85, and organic ester 10, sodium metasilicate 4, all the other are water; The consumption of described curing agent is 35% of a binding agent consumption, and the consumption of coupling agent is 0.25% of a binding agent consumption, and the consumption of binding agent is 3% of a roughing sand consumption, and the consumption of lubricant is 0.3% of a roughing sand consumption.
3. a kind of urethane resin self-hardening sand according to claim 1 and 2 is characterized in that: the constituent of described binding agent and weight portion ratio thereof are: urethane resin 60-70, and phenolic resins 20-30, acrylic acid 5-15, all the other are water.
4. a kind of urethane resin self-hardening sand according to claim 3 is characterized in that: the constituent of described binding agent and weight portion ratio thereof are: urethane resin 65, and phenolic resins 25, acrylic acid 10, all the other are water.
5. a kind of urethane resin self-hardening sand according to claim 3 is characterized in that: described organic ester is a n-propyl acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010271410 CN101966556A (en) | 2010-09-03 | 2010-09-03 | Urethane resin self-hardening sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010271410 CN101966556A (en) | 2010-09-03 | 2010-09-03 | Urethane resin self-hardening sand |
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| CN101966556A true CN101966556A (en) | 2011-02-09 |
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| CN 201010271410 Pending CN101966556A (en) | 2010-09-03 | 2010-09-03 | Urethane resin self-hardening sand |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58212833A (en) * | 1982-06-04 | 1983-12-10 | Toshiba Mach Co Ltd | Organic self-curing sand for producing casting mold |
| CN1114600A (en) * | 1994-07-05 | 1996-01-10 | 江苏理工大学 | Method for preparation of organic ester water glass self-hardening sand by using reclaimed sand |
| JP2004255451A (en) * | 2003-02-27 | 2004-09-16 | Asahi Organic Chem Ind Co Ltd | Organic binder for mold, casting sand composition obtained by using the binder, and mold |
-
2010
- 2010-09-03 CN CN 201010271410 patent/CN101966556A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58212833A (en) * | 1982-06-04 | 1983-12-10 | Toshiba Mach Co Ltd | Organic self-curing sand for producing casting mold |
| CN1114600A (en) * | 1994-07-05 | 1996-01-10 | 江苏理工大学 | Method for preparation of organic ester water glass self-hardening sand by using reclaimed sand |
| JP2004255451A (en) * | 2003-02-27 | 2004-09-16 | Asahi Organic Chem Ind Co Ltd | Organic binder for mold, casting sand composition obtained by using the binder, and mold |
Non-Patent Citations (1)
| Title |
|---|
| 《中国材料工程大典 第18卷 材料铸造形成工程(上册)》 20060131 柳百成，黄天佑主编 第4章 砂型铸造 化学工业出版社 731-732 1-5 , 1 * |
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Application publication date: 20110209 |