CN101642797A - Mending paste special for lost foam casting - Google Patents
Mending paste special for lost foam casting Download PDFInfo
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- CN101642797A CN101642797A CN200910170015A CN200910170015A CN101642797A CN 101642797 A CN101642797 A CN 101642797A CN 200910170015 A CN200910170015 A CN 200910170015A CN 200910170015 A CN200910170015 A CN 200910170015A CN 101642797 A CN101642797 A CN 101642797A
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- mending paste
- lost foam
- foam casting
- polyethylene glycol
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Abstract
The invention relates to a mending paste special for lost foam casting, comprising the following components in parts by weight: 70-80 parts of stearic acid, 20-30 parts of paraffin, 10-20 parts of polyethylene glycol, 4-5 parts of sodium hydroxide and 40-50 parts of water, wherein the melting point of stearic acid is 70-71 DEG C, the freezing point is 54-57 DEG C, the viscosity of polyethylene glycol is 37-45Pa-s and the hydroxyl value is 268-249mgHON/g. The mending paste has the advantage of good forming property and levelling property, high strength, good surface glossiness, low gas generation and good residue decomposition property at high temperature.
Description
Technical field
The invention belongs to a kind of chemical products, be specifically related to a kind of mending paste special for lost foam casting.
Background technology
Lost foam casting is to adopt polystyrene to make bubbles model, under negative pressure state, utilizes hot metal gas bubble foam model and replaces the space that bubbles model occupies, then cooling forming and form the casting technique of foundry goods.Merge defective such as bad and scrap owing to the surface appears easily in bubbles model in manufacture process, come repair-deficiency occurring being coated with the last layer mending paste on the surface of defective usually.The mending paste intensity of using is low at present, and moulding property is bad, and gas forming amount is big, and the pyrolytic residue is many, therefore can not guarantee casting quality well.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art and shortcoming, and a kind of serviceability and the good mending paste special for lost foam casting of processing performance are provided, thereby improves the quality of foundry goods.
Technical scheme of the present invention: a kind of mending paste special for lost foam casting, its component and weight content are as follows:
70～80 parts of stearic acid, 20～30 parts in paraffin, 10～20 parts of polyethylene glycol,
4～5 parts in NaOH, 40～50 parts in water.
Described stearic fusing point is 70～71 ℃, and freezing point is 54～57 ℃, and the viscosity of polyethylene glycol is 37～45Pa.s, and hydroxyl value is 268～249mgHON/g.
The present invention compared with prior art has following beneficial effect: 1, described mending paste has higher surface strength, make bubbles model in handling process mending paste can peeling, drop; 2, described mending paste has good moulding property and surface smoothness, and the cast(ing) surface fineness that makes cast come out is good, has improved the competitiveness of foundry goods on market; 3, described mending paste has the low characteristic of gas-forming property, and the gas that makes bubbles model produce in casting process is few, and the workman's operating environment and the internal quality of casting are all improved a lot; 4, described mending paste has the characteristic of high-temperature gasification residue, is very helpful for solving the distinctive elephant skin defective of lost foam casting.
The specific embodiment
Embodiment 1
A kind of mending paste special for lost foam casting is characterized in that its component and weight content are as follows:
Stearic acid 800g, paraffin 200g, polyethylene glycol 150g, NaOH 50g, water 400g.Wherein stearic fusing point is 70～71 ℃, and freezing point is 54～57 ℃, and the viscosity of polyethylene glycol is 37～45Pa.s, and hydroxyl value is 268～249mgHON/g.
Embodiment 2
A kind of mending paste special for lost foam casting is characterized in that its component and weight content are as follows:
Stearic acid 700g, paraffin 300g, Macrogol 200 g, NaOH 40g, water 500g.Wherein stearic fusing point is 70～71 ℃, and freezing point is 54～57 ℃, and the viscosity of polyethylene glycol is 37～45Pa.s, and hydroxyl value is 268～249mgHON/g.
Embodiment 3
A kind of mending paste special for lost foam casting is characterized in that its component and weight content are as follows:
Stearic acid 750g, paraffin 250g, polyethylene glycol 100g, NaOH 45g, water 450g.Wherein stearic fusing point is 70～71 ℃, and freezing point is 54～57 ℃, and the viscosity of polyethylene glycol is 37～45Pa.s, and hydroxyl value is 268～249mgHON/g.
The preparation method of above-mentioned mending paste special for lost foam casting: stearic acid, paraffin, polyethylene glycol, water are mixed in the steel vessel, and heating then treats that stearic acid and paraffin dissolve the back fully and adds hydrogen-gasified sodium, leaves standstill room temperature after the stirring and is shaped as.
Claims (2)
1, a kind of mending paste special for lost foam casting is characterized in that its component and weight content are as follows: 70～80 parts of stearic acid, 20～30 parts in paraffin, 10～20 parts of polyethylene glycol, 4～5 parts in NaOH, 40～50 parts in water.
2, mending paste special for lost foam casting according to claim 1 is characterized in that described stearic fusing point is 70～71 ℃, and freezing point is 54～57 ℃, and the viscosity of polyethylene glycol is 37～45Pas, and hydroxyl value is 268～249mgHON/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101700151A CN101642797B (en) | 2009-09-01 | 2009-09-01 | Mending paste special for lost foam casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101700151A CN101642797B (en) | 2009-09-01 | 2009-09-01 | Mending paste special for lost foam casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101642797A true CN101642797A (en) | 2010-02-10 |
| CN101642797B CN101642797B (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101700151A Expired - Fee Related CN101642797B (en) | 2009-09-01 | 2009-09-01 | Mending paste special for lost foam casting |
Country Status (1)
| Country | Link |
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| CN (1) | CN101642797B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225456A (en) * | 2011-06-24 | 2011-10-26 | 吴耀祖 | Fired mold manufacturing method |
| CN102416439A (en) * | 2010-09-26 | 2012-04-18 | 东风精密铸造有限公司 | Foam pattern surface treatment method of ceramic shell lost foam casting |
| CN103286264A (en) * | 2013-06-14 | 2013-09-11 | 芜湖瑞鹄铸造有限公司 | Mending agent for full mold processed foam model |
| CN105014009A (en) * | 2015-07-31 | 2015-11-04 | 宁夏共享模具有限公司 | Material capable of eliminating evaporative pattern surface roughness and preparation method thereof |
| CN108838330A (en) * | 2018-08-01 | 2018-11-20 | 安徽信息工程学院 | A kind of method for repairing and mending of evaporative pattern |
| CN109014037A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of evaporative pattern mending paste and preparation method thereof |
| CN109317606A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流铸业有限公司 | A kind of lost foam pattern processing method |
| CN111451441A (en) * | 2020-04-30 | 2020-07-28 | 河南天缘精工模具有限公司 | Method for improving surface smoothness of lost foam hollow shell casting |
-
2009
- 2009-09-01 CN CN2009101700151A patent/CN101642797B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416439A (en) * | 2010-09-26 | 2012-04-18 | 东风精密铸造有限公司 | Foam pattern surface treatment method of ceramic shell lost foam casting |
| CN102225456A (en) * | 2011-06-24 | 2011-10-26 | 吴耀祖 | Fired mold manufacturing method |
| CN103286264A (en) * | 2013-06-14 | 2013-09-11 | 芜湖瑞鹄铸造有限公司 | Mending agent for full mold processed foam model |
| CN103286264B (en) * | 2013-06-14 | 2016-06-08 | 芜湖瑞鹄铸造有限公司 | A kind of cavityless casting bubbles model healant |
| CN105014009A (en) * | 2015-07-31 | 2015-11-04 | 宁夏共享模具有限公司 | Material capable of eliminating evaporative pattern surface roughness and preparation method thereof |
| CN108838330A (en) * | 2018-08-01 | 2018-11-20 | 安徽信息工程学院 | A kind of method for repairing and mending of evaporative pattern |
| CN109014037A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of evaporative pattern mending paste and preparation method thereof |
| CN109014037B (en) * | 2018-08-01 | 2020-06-16 | 安徽信息工程学院 | Repair paste for lost foam and preparation method thereof |
| CN108838330B (en) * | 2018-08-01 | 2020-06-16 | 安徽信息工程学院 | Repairing method of lost foam |
| CN109317606A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流铸业有限公司 | A kind of lost foam pattern processing method |
| CN111451441A (en) * | 2020-04-30 | 2020-07-28 | 河南天缘精工模具有限公司 | Method for improving surface smoothness of lost foam hollow shell casting |
| CN111451441B (en) * | 2020-04-30 | 2021-11-12 | 河南天缘精工模具有限公司 | Method for improving surface smoothness of lost foam hollow shell casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101642797B (en) | 2011-05-18 |
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Granted publication date: 20110518 Termination date: 20120901 |