CN101195148A - Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof - Google Patents
Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof Download PDFInfo
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- CN101195148A CN101195148A CNA2007103002780A CN200710300278A CN101195148A CN 101195148 A CN101195148 A CN 101195148A CN A2007103002780 A CNA2007103002780 A CN A2007103002780A CN 200710300278 A CN200710300278 A CN 200710300278A CN 101195148 A CN101195148 A CN 101195148A
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Abstract
The invention discloses a camshaft sand mould for manufacturing coated sands, which takes regenerated sands as base sands. The invention is characterized in that the invention is a passing shaft which is composed of an upper sand mould of the coated sands and a lower sand mould of the coated and, and provided with a boss in the middle portion. A manufacturing method comprises firstly, enabling waste sands to regenerate under high temperature, secondly, producing the regenerated sand, thirdly, taking the regenerated sands as the base sands and producing the coated sands, fourthly, heating the mould to 290-310 DEG C, fifthly, inbreathing the coated sands into the camshaft sand mould through compressed air, heating for 110-130 seconds, and curing into the mold, sixthly, obtaining an intact camshaft sand mould after adhering the upper sand mould and the lower sand mould. The superiorities of the invention lie in that blank dimensions of camshaft casts can be more accurate and process redundancy can be minimized due to the low thermal expansion rate of the sands, and cost can be saved. Defects of casts as air holes can be lowered due to low air forming property, and simultaneously effects to environment can be minimized, deformation and cracks of sand moulds can be avoided due to high strength, which is beneficial to arrange and transport, and the quality of cast surfaces can be increased. Flow ability can be improved, and defective indexes of the casts can be lowered. The invention has high strength, smooth surface and good breathing property.
Description
(1) technical field:
The present invention relates to a kind of precoated sand sand mold and manufacture method thereof, especially a kind of is the camshaft sand mold and the manufacture method thereof of the precoated sand manufacturing of roughing sand with reclaimed sand.
(2) background technology:
Precoated sand is as important type selecting material, and along with machine-building and developing of automobile industry, use amount is increasing, and annual precoated sand surpasses 1,000,000 tons in China, must recycle after western developed country resin sand uses.For example, Germany just formulated and had issued " offal treatment method " as far back as 1972, promulgation " recycling economy and waste pipe logos " again in 1996.And the antiquated sand after China casting producer is casting is not that to fill out the hole be exactly to abandon, and nondegradable phenolic resins brings very big harm to environment in the precoated sand.
21 century should be the century of " green casting ", and the protection environment realizes that sustainable development is our fundamental state policy, and precoated sand is produced cleaning of Foundry Works and played decisive role.
(3) summary of the invention:
It is the camshaft sand mold and the manufacture method thereof of the precoated sand manufacturing of roughing sand with reclaimed sand that goal of the invention of the present invention is to invent a kind of, it is with resources effective utilization and be recycling as core, reduce and enter energy flow in the foundry production, replace roughing sand to produce the precoated sand of better performances with reclaimed sand, improve the quality of foundry goods such as camshaft, promote developing of automobile industry.
Technical scheme of the present invention is: a kind of is the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, 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.
Above-mentioned said precoated sand is made up of roughing sand, binding agent, curing agent and lubricant, and weight ratio is 100: 1～3: 0.12～0.45: 0.03～0.15.
Above-mentioned said roughing sand is a reclaimed sand.
Above-mentioned said binding agent is a phenolic resins.
Can add additive in the above-mentioned said precoated sand, said additive is dibutyl phthalate or brown iron oxide.
A kind of is the method for the precoated sand manufacturing camshaft sand mold of roughing sand with reclaimed sand, it is characterized in that it may further comprise the steps:
(1) antiquated sand is at high temperature regenerated, in the silica sand oxide quartz of crystal shape silicon by alpha-crystal to same structural variant β crystalline transformation;
(2) antiquated sand regeneration makes the burning of silica sand surface resin film simultaneously, and the tripoli metal oxide is peeled off, and produces reclaimed sand;
(3) reclaimed sand of producing with step (2) is that roughing sand is produced precoated sand;
(4) on core making machine with camshaft sand mold mold heated to 290～310 ℃;
(5) precoated sand that step (3) is produced is blown in the camshaft sand mold mould by compressed air and heated 110～130 seconds, curing molding, camshaft sand mold mould is divided into mo(u)ld top half and mo(u)ld bottom half, in establish the camshaft die cavity;
(6) promptly obtain complete camshaft sand mold after upper and lower two pastings of core.
Superiority of the present invention is: the precoated sand that 1, with reclaimed sand is roughing sand can make camshaft spray size more accurate and reduce allowance because the sand coefficient of thermal expansion reduces when making the such super large sand mold of camshaft sand mold, saves cost; 2, gas-forming property is low can reduce casting defect such as pore, when reducing system type and casting simultaneously to the influence of environment; 3, the intensity height can be avoided sand mold distortion and fracture, is beneficial to and piles up and transport, and also can improve surface quality of continuous castings; 4, Liu Dongxing improvement can prevent that sand mold from blowing deficiency when the system type, reduce the casting wasted product rate; 5, to recycle sand mold intensity height, any surface finish, the good permeability that reclaimed sand is the precoated sand manufacturing of roughing sand, can be used for the camshaft of car engine foundry goods that allowance is little, dimensional accuracy is high.
(4) description of drawings:
Fig. 1 for the present invention related a kind of be that the precoated sand of roughing sand is made sand mold structural representation in the method for camshaft sand mold with reclaimed sand.
(5) specific embodiment:
Embodiment: a kind of is the camshaft sand mold (see figure 1) that the precoated sand of roughing sand is made with reclaimed sand, 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.
Above-mentioned said precoated sand is made up of roughing sand, binding agent, curing agent and lubricant, and weight ratio is 100: 2: 0.3: 0.1.
Above-mentioned said roughing sand is a reclaimed sand.
Above-mentioned said binding agent is a phenolic resins.
Can add additive in the above-mentioned said precoated sand, said additive is dibutyl phthalate or brown iron oxide.
A kind of is the method for the precoated sand manufacturing camshaft sand mold (see figure 1) of roughing sand with reclaimed sand, it is characterized in that it may further comprise the steps:
(1) antiquated sand is at high temperature regenerated, in the silica sand oxide quartz of crystal shape silicon by alpha-crystal to same structural variant β crystalline transformation;
(2) antiquated sand regeneration makes the burning of silica sand surface resin film simultaneously, and the tripoli metal oxide is peeled off, and produces reclaimed sand;
(3) reclaimed sand of producing with step (2) is that roughing sand is produced precoated sand;
(4) on core making machine with camshaft sand mold mold heated to 300 ℃;
(5) precoated sand that step (3) is produced was blown in the camshaft sand mold mould heating 120 seconds by compressed air, curing molding, camshaft sand mold mould is divided into mo(u)ld top half and mo(u)ld bottom half, in establish the camshaft die cavity;
(6) promptly obtain complete camshaft sand mold after upper and lower two pastings of core.
The sand mold made from common precoated sand and be the performance comparison of the camshaft sand mold made of the precoated sand of roughing sand with reclaimed sand:
Claims (6)
1. one kind is the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, 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.
According to claim 1 said a kind of be the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, it is characterized in that said precoated sand is made up of roughing sand, binding agent, curing agent and lubricant, weight ratio is 100: 1～3: 0.12～0.45: 0.03～0.15.
According to claim 2 said a kind of be the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, it is characterized in that said roughing sand is a reclaimed sand.
According to claim 2 said a kind of be the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, it is characterized in that said binding agent is a phenolic resins.
According to claim 1 or 2 said a kind of be the camshaft sand mold that the precoated sand of roughing sand is made with reclaimed sand, it is characterized in that can adding additive in the said precoated sand, said additive is dibutyl phthalate or brown iron oxide.
6. one kind is the method for the precoated sand manufacturing camshaft sand mold of roughing sand with reclaimed sand, it is characterized in that it may further comprise the steps:
(1) antiquated sand is at high temperature regenerated, in the silica sand oxide quartz of crystal shape silicon by alpha-crystal to same structural variant β crystalline transformation;
(2) antiquated sand regeneration makes the burning of silica sand surface resin film simultaneously, and the tripoli metal oxide is peeled off, and produces reclaimed sand;
(3) reclaimed sand of producing with step (2) is that roughing sand is produced precoated sand;
(4) on core making machine with camshaft sand mold mold heated to 290～310 ℃;
(5) precoated sand that step (3) is produced is blown in the camshaft sand mold mould by compressed air and heated 110～130 seconds, curing molding, camshaft sand mold mould is divided into mo(u)ld top half and mo(u)ld bottom half, in establish the camshaft die cavity;
(6) promptly obtain complete camshaft sand mold after upper and lower two pastings of core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103002780A CN101195148A (en) | 2007-04-05 | 2007-12-26 | Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710057072 | 2007-04-05 | ||
| CN200710057072.X | 2007-04-05 | ||
| CNA2007103002780A CN101195148A (en) | 2007-04-05 | 2007-12-26 | Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101195148A true CN101195148A (en) | 2008-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103002780A Pending CN101195148A (en) | 2007-04-05 | 2007-12-26 | Camshaft sand mold manufactured with tectorial membrane sand with reclaimed sand as roughing sand and manufacturing method thereof |
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| CN (1) | CN101195148A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319873A (en) * | 2011-10-10 | 2012-01-18 | 广西玉林玉柴机器配件制造有限公司 | The production method of Iron Mould Coated Sand cast block |
| CN102836948A (en) * | 2011-06-22 | 2012-12-26 | 欧俊华 | Regenerated coated sand and preparation method thereof |
| CN103691877A (en) * | 2013-12-17 | 2014-04-02 | 重庆长江造型材料（集团）股份有限公司 | Resin precoated sand prepared from reclaimed sand |
| CN103949578A (en) * | 2014-04-04 | 2014-07-30 | 繁昌县金科机电科技有限公司 | Automobile engine cylinder cover and manufacturing method thereof |
| CN104209450A (en) * | 2014-09-04 | 2014-12-17 | 河南省西峡汽车水泵股份有限公司 | Special precoated sand for cast of high alloy material |
| CN107377886A (en) * | 2017-08-01 | 2017-11-24 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN108160916A (en) * | 2018-01-07 | 2018-06-15 | 甘肃北霖新材料科技有限公司 | A kind of method that special purpose high intensity precoated sand is prepared with Desert Sand |
| CN110614342A (en) * | 2019-10-24 | 2019-12-27 | 福建省同兴汽车同步器有限公司石狮鸿山分公司 | Regenerative casting precoated sand using waste sand as raw material and preparation process thereof |
-
2007
- 2007-12-26 CN CNA2007103002780A patent/CN101195148A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836948A (en) * | 2011-06-22 | 2012-12-26 | 欧俊华 | Regenerated coated sand and preparation method thereof |
| CN102319873A (en) * | 2011-10-10 | 2012-01-18 | 广西玉林玉柴机器配件制造有限公司 | The production method of Iron Mould Coated Sand cast block |
| CN102319873B (en) * | 2011-10-10 | 2013-04-10 | 广西玉林玉柴机器配件制造有限公司 | Production method for sand-lined metal mold casting cylinder body |
| CN103691877A (en) * | 2013-12-17 | 2014-04-02 | 重庆长江造型材料（集团）股份有限公司 | Resin precoated sand prepared from reclaimed sand |
| CN103691877B (en) * | 2013-12-17 | 2017-01-04 | 重庆长江造型材料（集团）股份有限公司 | Coated sand prepared by reclaimed sand |
| CN103949578B (en) * | 2014-04-04 | 2015-10-14 | 繁昌县金科机电科技有限公司 | Cylinder cover of automobile engine and preparation method thereof |
| CN103949578A (en) * | 2014-04-04 | 2014-07-30 | 繁昌县金科机电科技有限公司 | Automobile engine cylinder cover and manufacturing method thereof |
| CN104209450A (en) * | 2014-09-04 | 2014-12-17 | 河南省西峡汽车水泵股份有限公司 | Special precoated sand for cast of high alloy material |
| CN104209450B (en) * | 2014-09-04 | 2016-06-15 | 西峡县西泵特种铸造有限公司 | A kind of extraordinary precoated sand of high alloy material foundry goods |
| CN107377886A (en) * | 2017-08-01 | 2017-11-24 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN107377886B (en) * | 2017-08-01 | 2019-06-04 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN108160916A (en) * | 2018-01-07 | 2018-06-15 | 甘肃北霖新材料科技有限公司 | A kind of method that special purpose high intensity precoated sand is prepared with Desert Sand |
| CN110614342A (en) * | 2019-10-24 | 2019-12-27 | 福建省同兴汽车同步器有限公司石狮鸿山分公司 | Regenerative casting precoated sand using waste sand as raw material and preparation process thereof |
| CN110614342B (en) * | 2019-10-24 | 2021-06-22 | 福建省同兴汽车同步器有限公司石狮鸿山分公司 | Regenerative casting precoated sand using waste sand as raw material and preparation process thereof |
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