CN102059319A - Joint regeneration method for old resin sand - Google Patents
Joint regeneration method for old resin sand Download PDFInfo
- Publication number
- CN102059319A CN102059319A CN201110021553.1A CN201110021553A CN102059319A CN 102059319 A CN102059319 A CN 102059319A CN 201110021553 A CN201110021553 A CN 201110021553A CN 102059319 A CN102059319 A CN 102059319A
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- China
- Prior art keywords
- sand
- resin bonded
- old
- resin
- bonded sand
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- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 103
- 239000011347 resin Substances 0.000 title claims abstract description 70
- 229920005989 resin Polymers 0.000 title claims abstract description 70
- 238000011069 regeneration method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000008929 regeneration Effects 0.000 claims abstract description 19
- 238000005266 casting Methods 0.000 claims abstract description 16
- 210000004400 mucous membrane Anatomy 0.000 claims abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims abstract description 7
- 230000001172 regenerating effect Effects 0.000 claims description 22
- 230000032683 aging Effects 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 8
- 238000010297 mechanical methods and process Methods 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 7
- 230000001066 destructive effect Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000003513 alkali Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000007849 furan resin Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000010125 resin casting Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention provides a joint regeneration method for old resin sand, and belongs to the technical field of cast old sand regeneration. The method comprises the following steps of: performing pretreatment such as magnetic separation, screening, dust removal and the like on the old resin sand for casting, obtained by falling sand after a casting is cast; then irradiating the pretreated old resin sand for a certain time by using ultraviolet rays containing infrared rays under certain temperature and irradiation distance conditions to fully age a mucous membrane on the surface of the old resin sand; and performing regeneration treatment on the aged old resin sand by using a common mechanical method to obtain regenerated resin sand. The method can be used for effectively reducing mechanical force and power consumption for a regeneration system and reducing the crushing rate of the regenerated old sand, and has the advantages of low crushing rate and power consumption, low environmental pollution and the like.
Description
Technical field
The present invention relates to a kind of combining and regenerating method of resin bonded sand, belong to the casting old-sand regeneration technical field.
Background technology
Resin sand has the intensity height, collapsibility is good, cast(ing) surface is bright and clean, the dimensional accuracy advantages of higher.In recent years, along with the raising that casting quality is required, resin sand is obtaining development faster aspect the casting techniques such as moulding, coremaking.In order to guarantee casting quality, reduce and use the sand cost, resin bonded sand regeneration and recycle utilization also become more and more important.
The essence of regenerating used is exactly to adopt a kind of method to make the bigger destructive power of generation between binding agent and the sand grains, to remove the putamina that is wrapped on the sand grains effectively, the surface of exposing sand grains, become sand grains independent, that the surface does not have residual binding agent, sand grains again should less fragmentation or refinement in the regenerative process simultaneously.Destructive power could be removed the putamina that is wrapped on the sand grains greater than the adhesive force between binding agent and the sand grains; It is broken that destructive power can make sand grains produce again during greater than the cohesive force of sand grains itself.Adhesive force between binding agent and the sand grains is big more, and the destructive power that needs during regenerative process is also just big more, and the energy that needs is also just high more, and the percentage of damage of sand grains is also just high more, and effective reclamation rate of regenerating is then poor more.Has only destructive power greater than the adhesive force between binding agent and the sand grains but, just removal effect preferably can be arranged less than the cohesive force of sand grains itself.
The renovation process of conventional resins old sand has two kinds of Mechanical Method and Re Fa combine methods.When the adhesive force between resinoid bond and the sand grains is big, adopt Mechanical Method that resin bonded sand is regenerated merely, the mechanical damage power that needs is bigger, and the percentage of damage of regeneration back old sand is than higher, and it is more to consume energy.Though hot method can reduce the adhesive force between resinoid bond and the sand grains, this method except consume energy more, environment is also had more serious pollution.Seeking and a kind ofly not only can replace hot method to reduce adhesive force between resinoid bond and the sand grains, but also the green regenerating method of environmentally safe, is an important development direction of resin bonded sand regeneration.
Summary of the invention
The combining and regenerating method that the purpose of this invention is to provide a kind of resin bonded sand, it is aging to utilize the additional infrared radiation of ultraviolet ray to impel resin bonded sand resin surface mucous membrane to produce, and then with Mechanical Method to processings of regenerating of aging resin bonded sand, to reduce power consumption and to reduce the percentage of damage of the old sand of regenerating.
Technical scheme of the present invention is: at first adopt commonsense method, the casting resin old sand that knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Using main crest to be that 365～417nm(spectral effective scope is 350～450nm), power density is 30～200W/cm and contain ultrared artificial ultraviolet light source then (can use and contain ultrared general ultraviolet line lamp, wavelength and power density can be selected according to actual needs), under 50～200 ℃ of temperature and 2～30 ㎝ irradiation distance conditions, to through pretreated resin bonded sand irradiation 2～40 hours, make resin bonded sand resin surface mucous membrane fully aging; Utilize the standard machinery method to the processing of regenerating of the resin bonded sand after aging again, obtain resin regeneration sand.
The present invention carries out treatment with irradiation by ultraviolet ray and infrared ray to resin bonded sand, utilize the caused photooxidative degradation reaction of ultraviolet light and infrared ray, impel the binding agent (macromolecular material) on resin bonded sand surface aging, thereby reduce the adhesive force of resin bonded sand surface mucous membrane greatly, make the required mechanical force of mechanical process regeneration processing subsequently reduce greatly, not only the consumption of required mechanical force of regenerative system and power can be effectively reduced, and the percentage of damage of regeneration old sand can be reduced.Simultaneously, because the irradiation of ultraviolet light and lower regeneration treatment temperature can not produce the secondary pollution that the burning of resin pyrolytic is brought, make environmental pollution also significantly reduce.Therefore, have advantages such as percentage of damage and power consumption are low, environmental pollution is little, for the new approach that provides is provided in the regeneration of resin bonded sand.
The specific embodiment
Embodiment one: the combining and regenerating method of this resin bonded sand is: adopt commonsense method earlier, the casting alkali phenolic resins old sand that knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Use then main crest as 417nm(spectral effective scope be 350～450nm), power density is as 30W/cm and contain ultrared general ultraviolet line lamp, under 50 ℃ of temperature and 30 ㎝ irradiation distance conditions, to through pretreated resin bonded sand irradiation 40 hours, make resin bonded sand resin surface mucous membrane fully aging; Utilize air-flow regeneration Mechanical Method to the processing of regenerating of the resin bonded sand after aging again, obtain resin regeneration sand.
Embodiment two: the combining and regenerating method of this resin bonded sand is: adopt commonsense method earlier, the casting alkali phenolic resins old sand that knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Use then main crest as 403nm(spectral effective scope be 350～450nm), power density is as 200W/cm and contain ultrared general ultraviolet line lamp, under 200 ℃ of temperature and 2 ㎝ irradiation distance conditions, to through pretreated resin bonded sand irradiation 2 hours, make resin bonded sand resin surface mucous membrane fully aging; Utilize centrifugal regeneration Mechanical Method to the processing of regenerating of the resin bonded sand after aging again, obtain resin regeneration sand.
Embodiment three: the combining and regenerating method of this resin bonded sand is: adopt commonsense method earlier, the furan resin casting old sand that knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Use then main crest as 365nm(spectral effective scope be 350～450nm), power density is as 50W/cm and contain ultrared general ultraviolet line lamp, under 150 ℃ of temperature and 15 ㎝ irradiation distance conditions, to through pretreated resin bonded sand irradiation 24 hours, make resin bonded sand resin surface mucous membrane fully aging; Utilize the friction-type (sand) reclaimer to the processing (grinding about 1 minute 50 times) of regenerating of the resin bonded sand after aging again, promptly obtain resin regeneration sand.
Embodiment four: the combining and regenerating method of this resin bonded sand is: the furan resin casting old sand that earlier knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Use then main crest as 365nm(spectral effective scope be 350～450nm), power density is as 50W/cm and contain ultrared general ultraviolet line lamp, under 150 ℃ of temperature and 15 ㎝ irradiation distance conditions, to through pretreated resin bonded sand irradiation 36 hours, make resin bonded sand resin surface mucous membrane fully aging; Utilize the friction-type (sand) reclaimer to the processing (grinding about 1 minute 50 times) of regenerating of the resin bonded sand after aging again, promptly obtain resin regeneration sand.
Following table is for only carrying out pretreated resin bonded sand, carried out the reclaimed sand that preliminary treatment is shone, and the igloss amount of embodiment three and four reclaimed sands and average fineness situation.
| The old sand type | Igloss amount (%) | Average fineness |
| The preliminary treatment old sand | 0.81? | 26.0 |
| Do not shine reclaimed sand | 0.39? | 75.6 |
| Irradiation 24h reclaimed sand | 0.27 | 74.6 |
| Irradiation 36h reclaimed sand | 0.26? | 73.0 |
As can be seen from the table, the furane resins old sand is after the additional infrared radiation of ultraviolet ray, and the igloss amount of its reclaimed sand is starkly lower than the igloss amount of the reclaimed sand of non-irradiated furane resins old sand; Irradiation time is long more, and the igloss amount is more little, and promptly the residual binding agent of sand grain surface is few more.The reclaimed sand average fineness of furane resins old sand after the additional infrared radiation of ultraviolet ray diminishes, and irradiation time is long more, and average fineness is more little, and promptly the reclaimed sand granularity of furane resins old sand after the additional infrared radiation of ultraviolet ray becomes big, and percentage of damage reduces.
Claims (3)
1. the combining and regenerating method of a resin bonded sand, it is characterized in that: the casting resin old sand that at first knockout behind the casting pouring is obtained carries out magnetic separation, screening and dedusting preliminary treatment; Use then and contain ultrared artificial ultraviolet light source, under certain temperature and irradiation distance condition,, make resin bonded sand resin surface mucous membrane fully aging through the pretreated resin bonded sand irradiation regular hour; Utilize the standard machinery method to the processing of regenerating of the resin bonded sand after aging again, obtain resin regeneration sand.
2. the combining and regenerating method of resin bonded sand according to claim 1 is characterized in that: the main crest that contains ultrared artificial ultraviolet light source of irradiation resin bonded sand is that 365～417nm, power density are 30～200W/cm.
3. the combining and regenerating method of resin bonded sand according to claim 1 and 2 is characterized in that: containing ultrared artificial ultraviolet light source is 2～30 ㎝ to the irradiation distance of resin bonded sand, and irradiation time is 2～40 hours, and the irradiation temperature condition is 50～200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110021553.1A CN102059319B (en) | 2011-01-19 | 2011-01-19 | Joint regeneration method for old resin sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110021553.1A CN102059319B (en) | 2011-01-19 | 2011-01-19 | Joint regeneration method for old resin sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102059319A true CN102059319A (en) | 2011-05-18 |
| CN102059319B CN102059319B (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110021553.1A Expired - Fee Related CN102059319B (en) | 2011-01-19 | 2011-01-19 | Joint regeneration method for old resin sand |
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| Country | Link |
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| CN (1) | CN102059319B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695188A (en) * | 2016-02-17 | 2016-06-22 | 安徽索立德铸业有限公司 | Used resin sand processing agent for sand casting |
| CN107262668A (en) * | 2017-07-11 | 2017-10-20 | 马鞍山市兴隆铸造有限公司 | A kind of furan resin-sand regenerating used method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01231983A (en) * | 1988-03-10 | 1989-09-18 | Mitsubishi Petrochem Co Ltd | Treatment of earth and sand containing heghly water-absorbing resin gel |
| CN1040604A (en) * | 1988-09-02 | 1990-03-21 | 吴正永 | Functional glass coating for color filtering |
| CN1054021A (en) * | 1990-02-14 | 1991-08-28 | Saz股份有限公司 | Upgrade the method for molding sand |
-
2011
- 2011-01-19 CN CN201110021553.1A patent/CN102059319B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01231983A (en) * | 1988-03-10 | 1989-09-18 | Mitsubishi Petrochem Co Ltd | Treatment of earth and sand containing heghly water-absorbing resin gel |
| CN1040604A (en) * | 1988-09-02 | 1990-03-21 | 吴正永 | Functional glass coating for color filtering |
| CN1054021A (en) * | 1990-02-14 | 1991-08-28 | Saz股份有限公司 | Upgrade the method for molding sand |
Non-Patent Citations (1)
| Title |
|---|
| 《2009中国铸造活动周论文集》 20091231 李汉锟等 酯硬化碱性酚醛树脂砂旧砂再生工艺的试验研究 411-415 1-3 , 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695188A (en) * | 2016-02-17 | 2016-06-22 | 安徽索立德铸业有限公司 | Used resin sand processing agent for sand casting |
| CN107262668A (en) * | 2017-07-11 | 2017-10-20 | 马鞍山市兴隆铸造有限公司 | A kind of furan resin-sand regenerating used method |
| CN107262668B (en) * | 2017-07-11 | 2019-03-01 | 马鞍山市兴隆铸造有限公司 | A kind of furan resin-sand regenerating used method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102059319B (en) | 2012-12-19 |
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