CN107649643A - A kind of regenerating used method of selective laser sintering mound precoated sand - Google Patents
A kind of regenerating used method of selective laser sintering mound precoated sand Download PDFInfo
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- CN107649643A CN107649643A CN201710810245.4A CN201710810245A CN107649643A CN 107649643 A CN107649643 A CN 107649643A CN 201710810245 A CN201710810245 A CN 201710810245A CN 107649643 A CN107649643 A CN 107649643A
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- sand
- precoated sand
- selective laser
- mound
- laser sintering
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- 239000004576 sand Substances 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 29
- 238000000110 selective laser sintering Methods 0.000 title claims abstract description 27
- 230000008929 regeneration Effects 0.000 claims abstract description 25
- 238000011069 regeneration method Methods 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000007885 magnetic separation Methods 0.000 claims abstract description 6
- 239000006148 magnetic separator Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 102
- 238000005245 sintering Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007528 sand casting Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention discloses a kind of regenerating used method of selective laser sintering mound precoated sand, and this method is：Will it is laser sintered after or casting use after waste and old mound precoated sand carry out coating stripping, primary crushing, magnetic separation, second-time breakage, screening, roasting, dedusting, screening obtain regenerating nice foundry sand, obtain regenerating mound precoated sand after carrying out regeneration nice foundry sand aluminum coated steel.The regeneration nice foundry sand thermal expansivity recycled using this method is small, heat endurance is good, and grain shape more they tends to spherical, to be prepared with it regeneration mound precoated sand intensity height, igloss amount reduces, gas forming amount is low, selective laser sintering processing is carried out to model with regeneration mound precoated sand, model surface quality is good, regenerating used method of the present invention avoids environmental pollution caused by waste and old mound precoated sand discharge, and larger economic benefit is obtained, reduces production cost, has saved resource.
Description
Technical field
The present invention relates to a kind of regenerating used method of selective laser sintering mound precoated sand.
Background technology
Selective Laser Sintering be in recent years rapid rising and development new technology, its basic process is computer system
Slicing treatment is carried out to the threedimensional model of input, then in the presence of laser beam, the shape of selectively sintering section, most
Superposition shaping afterwards.Feature be can quickly, high quality, it is high-precision sintering complicated shape product model or mould.Solve
The problem of traditional sand casting sand mold mould manufacturing cycle is long, costly, have in small lot sand casting production process compared with
It is widely applied.
Selective laser sintering is nice foundry sand with precoated sand roughing sand, and price is relatively expensive, is more than ten times of common silica sand,
The serious waste for not only causing resource is discharged after first use, also environment can be caused largely to pollute.
At present, the recycling of conventional cast silica sand has been obtained for relatively broad research and application, and selectivity swashs
Light sintering precoated sand be as Selective Laser Sintering is risen and is developed, as emerging agglomerated material, develop compared with
Evening, new material are currently in the popularization and application stage, and follow-up processing and recovery technology are immature.
Secondly, selective laser sintering is nice foundry sand with the roughing sand of precoated sand, and the main component of nice foundry sand is aluminum oxide,
So the techniques such as alkali cleaning, washing can not be implemented during roughing sand processing, in order to avoid causing the corrosion on roughing sand surface, roughing sand is reduced
Surface quality, influence the performances such as the mobility of follow-up aluminum coated steel and precoated sand.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is therefore an objective to provides a kind of the old of selective laser sintering mound precoated sand
Sand renovation process.Regeneration nice foundry sand thermal expansivity obtained by this method is small, and heat endurance is good, grain shape more they tend to it is spherical,
The precoated sand intensity prepared with regeneration nice foundry sand is high, and igloss amount reduces, and gas forming amount is low, and it is useless to realize selective laser sintering use
The cost-efficiently regeneration of old mound precoated sand uses.
Technical scheme is used by the present invention solves above-mentioned technical problem：
A kind of regenerating used method of selective laser sintering mound precoated sand, it is characterised in that：Comprise the following steps：
（1）Waste and old mound precoated sand by chosen property after laser sintered or after casting use carries out artificial coating stripping, tentatively
The coating smeared when peeling off casting in sand mold and core local surfaces, the antiquated sand after stripping is first sent into crushing mixer and carried out just
It is secondary broken, magnetic separator is re-fed into after broken and carries out magnetic separation, is tentatively removed the useless of external mud, coating and casting metal residual slag
Sand a；
（2）Antiquated sand a is added into mechanical grinder and carries out second-time breakage, reciprocating sieve is added afterwards and is screened, is further removed thin
Small exogenous impurity, obtain granular antiquated sand b；
（3）Antiquated sand b is added into roaster, is calcined and dust removal process, obtains regenerating nice foundry sand, will again with reciprocating sieve after cooling
Raw nice foundry sand carries out screening classification, then pack encapsulation respectively by different meshes；
（4）Nice foundry sand will be regenerated through hot method aluminum coated steel, prepare regeneration mound precoated sand.
The step（1）In, antiquated sand after stripping is 2-10min in the primary crushing time of crushing mixer, to antiquated sand
Frustillatum；
The step（1）In, the magnetic induction control of magnetic separator is collected and removed through magnetic fields and be useless in 2000-4000Gs
The metal impurities such as the iron filings in sand；
The step（2）In, antiquated sand a is 5-10min in the second-time breakage time of mechanical grinder, is less than to antiquated sand a into diameter
3.35mm graininess；
The step（2）In, the screen number of screen frame used in reciprocating sieve is 6-8 mesh；
The step（3）In, antiquated sand b is calcined 3-5h under the conditions of 750-900 DEG C of roaster, by the resin on antiquated sand b surfaces and change
Learn additive pyrolytic, burn；
The step（3）In, the burner hearth bottom of roaster is hemispherical, and setting one can surround vertical side inside burner hearth
To the agitator of middle shaft rotation, its bottom is heated using combustion gas；
The step（3）In, roasting and dedusting are carried out simultaneously, and dedusting is to be continually fed into dry air in burner hearth bottom side,
Roof of the furnace is persistently evacuated, and air-flow is internally formed in burner hearth, and caused dust in roasting process is removed；
The step（3）In, the regeneration nice foundry sand sand sample after cooling is taken, aqueous measurement is carried out to it with double plate infrared baking device
Examination, encapsulation is sieved and is packed again when measuring the water content of regeneration nice foundry sand less than 0.3%.
The device have the advantages that it is：
The invention provides a kind of regenerating used method of selective laser sintering mound precoated sand, this method is：By laser
Waste and old mound precoated sand after sintering or after casting use carries out coating stripping, primary crushing, magnetic separation, second-time breakage, screening, roasting
Burning, dedusting, screening obtain regenerating nice foundry sand, obtain regenerating mound precoated sand after carrying out regeneration nice foundry sand aluminum coated steel.
First, the old sand of mound precoated sand is recycled using the method for the invention so that selective laser
Waste and old mound precoated sand after sintering or casting use can recycle again, be discharged after solving the nice foundry sand use of costliness
Caused by the wasting of resources and problem of environmental pollution, achieve good economic benefit and environmental benefit；
Secondly, using being regenerated made from the method for the invention, nice foundry sand thermal expansivity is small, and heat endurance is good, and grain shape more becomes
In precoated sand intensity height that is spherical, being prepared with regeneration nice foundry sand, igloss amount reduces, and gas forming amount is low, with regeneration mound precoated sand
Selective laser sintering processing is carried out to model, model surface quality is good.
Embodiment
In order to which technical characteristic, purpose, effect and the embodiment of the present invention is more clearly understood, now illustrate this hair
Bright embodiment.
A kind of regenerating used method of selective laser sintering mound precoated sand, this method are：Will it is laser sintered after or
The waste and old mound precoated sand after use of casting carry out coating stripping, primary crushing, magnetic separation, second-time breakage, screening, roasting, dedusting,
Screening obtains regenerating nice foundry sand, obtains regenerating mound precoated sand after carrying out regeneration nice foundry sand aluminum coated steel.Returned using this method
The regeneration nice foundry sand thermal expansivity that receipts utilize is small, and heat endurance is good, and grain shape more they tends to spherical, to be prepared with it regeneration treasured
Pearl precoated sand intensity is high, and igloss amount reduces, and gas forming amount is low, and model is carried out at selective laser sintering with regeneration mound precoated sand
Reason, model surface quality is good, and regenerating used method of the present invention avoids environment caused by waste and old mound precoated sand discharge
Pollution, and larger economic benefit is obtained, production cost is reduced, has saved resource.
A kind of regenerating used method of selective laser sintering mound precoated sand, comprises the following steps：
（1）Waste and old mound precoated sand by chosen property after laser sintered or after casting use carries out artificial coating stripping, tentatively
The coating smeared when peeling off casting in sand mold and core local surfaces, the antiquated sand after stripping is first sent into crushing mixer and carried out just
It is secondary broken, magnetic separator is re-fed into after broken and carries out magnetic separation, is tentatively removed the useless of external mud, coating and casting metal residual slag
Sand a；
（2）Antiquated sand a is added into mechanical grinder and carries out second-time breakage, reciprocating sieve is added afterwards and is screened, is further removed thin
Small exogenous impurity, obtain granular antiquated sand b；
（3）Antiquated sand b is added into roaster, is calcined and dust removal process, obtains regenerating nice foundry sand, will again with reciprocating sieve after cooling
Raw nice foundry sand carries out screening classification, then pack encapsulation respectively by different meshes；
（4）Nice foundry sand will be regenerated through hot method aluminum coated steel, prepare regeneration mound precoated sand.
The step（1）In, antiquated sand after stripping is 2-10min in the primary crushing time of crushing mixer, to antiquated sand
Frustillatum；
The step（1）In, the magnetic induction control of magnetic separator is collected and removed through magnetic fields and be useless in 2000-4000Gs
The metal impurities such as the iron filings in sand；
The step（2）In, antiquated sand a is 5-10min in the second-time breakage time of mechanical grinder, is less than to antiquated sand a into diameter
3.35mm graininess；
The step（2）In, the screen number of screen frame used in reciprocating sieve is 6-8 mesh；
The step（3）In, antiquated sand b is calcined 3-5h under the conditions of 750-900 DEG C of roaster, by the resin on antiquated sand b surfaces and change
Learn additive pyrolytic, burn；
The step（3）In, the burner hearth bottom of roaster is hemispherical, and setting one can surround vertical side inside burner hearth
To the agitator of middle shaft rotation, its bottom is heated using combustion gas；
The step（3）In, roasting and dedusting are carried out simultaneously, and dedusting is to be continually fed into dry air in burner hearth bottom side,
Roof of the furnace is persistently evacuated, and air-flow is internally formed in burner hearth, and caused dust in roasting process is removed；
The step（3）In, the regeneration nice foundry sand sand sample after cooling is taken, aqueous measurement is carried out to it with double plate infrared baking device
Examination, encapsulation is sieved and is packed again when measuring the water content of regeneration nice foundry sand less than 0.3%.
The step（4）In, because nice foundry sand carries out aluminum coated steel category prior art, will not be described here.
Step is selected according to the method described above（1）The middle primary crushing time is 8min, the magnetic induction intensity of magnetic separator is
3500Gs；Step（2）In, the second-time breakage time is 7min, and screen number used in reciprocating sieve is 6 mesh；Step（3）Middle roaster
Sintering temperature and roasting time be 850 DEG C, 4.5h；Obtain regenerating nice foundry sand, with the precoated sand that it is prepared, prepared with roughing sand
Precoated sand is through testing the parameter comparison such as following table measured：
Table 1 regenerates nice foundry sand and precoated sand parameter comparison table of the roughing sand through being prepared under identical coating technique
| Project | Regenerate mound precoated sand | Precoated sand is made in roughing sand |
| Igloss amount（%） | 3.02 | 3.15 |
| Tensile strength（MPa） | 7.12 | 6.85 |
| Bending strength（MPa） | 10.08 | 9.85 |
The table shows, precoated sand is made compared to roughing sand using the regeneration mound precoated sand obtained by the method for the invention, burns
Decrement is reduced, and tensile strength and bending strength increase, and model is carried out at selective laser sintering with regeneration mound precoated sand
Reason, model surface quality are good.
Claims (9)
- A kind of 1. regenerating used method of selective laser sintering mound precoated sand, it is characterised in that：Comprise the following steps：（1）Waste and old mound precoated sand by chosen property after laser sintered or after casting use carries out artificial coating stripping, tentatively The coating smeared when peeling off casting in sand mold and core local surfaces, first send the antiquated sand after stripping into crushing mixer and is broken It is broken, magnetic separator is re-fed into after broken and carries out magnetic separation, is tentatively removed external mud, coating and the antiquated sand a for casting metal residual slag；（2）Antiquated sand a addition mechanical grinders are crushed, reciprocating sieve is added afterwards and is sieved, further removed tiny Exogenous impurity, obtain granular antiquated sand b；（3）Antiquated sand b is added into roaster, is calcined and dust removal process, obtains regenerating nice foundry sand, will again with reciprocating sieve after cooling Raw nice foundry sand carries out screening classification, then pack encapsulation respectively by different meshes；（4）Nice foundry sand will be regenerated through hot method aluminum coated steel, prepare regeneration mound precoated sand.
- 2. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（1）In, antiquated sand after stripping is 2-10min in the broken time of crushing mixer, to antiquated sand into fritter Shape.
- 3. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（1）In, the magnetic induction control of magnetic separator is collected and removed through magnetic fields and be useless in 2000-4000Gs The metal impurities such as the iron filings in sand.
- 4. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（2）In, antiquated sand a is 5-10min in the broken time of mechanical grinder, is less than to antiquated sand a into diameter 3.35mm graininess.
- 5. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（2）In, the screen number of screen frame used in reciprocating sieve is 6-8 mesh.
- 6. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（3）In, antiquated sand b is calcined 3-5h under the conditions of 750-900 DEG C of roaster, by the resin on antiquated sand b surfaces and change Learn additive pyrolytic, burn.
- 7. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（3）In, the burner hearth bottom of roaster is hemispherical, and setting one can surround vertically inside burner hearth The agitator of direction middle shaft rotation, its bottom are heated using combustion gas.
- 8. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（3）In, roasting and dedusting are carried out simultaneously, and dedusting is to be continually fed into dry air in burner hearth bottom side, Roof of the furnace is persistently evacuated, and air-flow is internally formed in burner hearth, and caused dust in roasting process is removed.
- 9. a kind of regenerating used method of selective laser sintering mound precoated sand according to claim 1, its feature It is：The step（3）In, the regeneration nice foundry sand sand sample after cooling is taken, water content is carried out to it with double plate infrared baking device Test, encapsulation is sieved and is packed again when measuring the water content of regeneration nice foundry sand less than 0.3%.
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| CN201710810245.4A CN107649643B (en) | 2017-09-11 | 2017-09-11 | A kind of regenerating used method of selective laser sintering mound precoated sand |
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| CN107649643B CN107649643B (en) | 2019-11-15 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723287A (en) * | 2018-06-11 | 2018-11-02 | 重庆长江造型材料（集团）股份有限公司 | A kind of thermal regeneration method of the inorganic overlay film hygrometric state antiquated sand of silicates |
| CN109093063A (en) * | 2018-08-29 | 2018-12-28 | 禹州市昆仑模具有限公司 | A kind of precoated sand regeneration method |
| CN109550887A (en) * | 2019-01-21 | 2019-04-02 | 浙江英洛华装备制造有限公司 | Mound precoated sand casts production system |
| CN109822041A (en) * | 2019-03-27 | 2019-05-31 | 烟台通鼎舟汽车零部件有限公司 | A kind of inorganic antiquated sand regeneration method |
| CN110935842A (en) * | 2019-10-18 | 2020-03-31 | 贵阳白云合金熔铸厂 | Precoated sand hot rubbing regeneration method and system |
| CN114101577A (en) * | 2021-11-24 | 2022-03-01 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN114273604A (en) * | 2021-11-15 | 2022-04-05 | 天阳新材料科技有限公司 | Recycling method of precoated sand dust |
| CN116603972A (en) * | 2023-07-20 | 2023-08-18 | 山西三联顺驰汽车配件有限公司 | Regeneration and selection process for Baozhu sand |
| CN117123729A (en) * | 2023-07-06 | 2023-11-28 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723287A (en) * | 2018-06-11 | 2018-11-02 | 重庆长江造型材料（集团）股份有限公司 | A kind of thermal regeneration method of the inorganic overlay film hygrometric state antiquated sand of silicates |
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| CN109550887A (en) * | 2019-01-21 | 2019-04-02 | 浙江英洛华装备制造有限公司 | Mound precoated sand casts production system |
| CN109822041A (en) * | 2019-03-27 | 2019-05-31 | 烟台通鼎舟汽车零部件有限公司 | A kind of inorganic antiquated sand regeneration method |
| CN110935842A (en) * | 2019-10-18 | 2020-03-31 | 贵阳白云合金熔铸厂 | Precoated sand hot rubbing regeneration method and system |
| CN114273604A (en) * | 2021-11-15 | 2022-04-05 | 天阳新材料科技有限公司 | Recycling method of precoated sand dust |
| CN114273604B (en) * | 2021-11-15 | 2023-08-29 | 天阳新材料科技有限公司 | Method for recycling precoated sand dust |
| CN114101577A (en) * | 2021-11-24 | 2022-03-01 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN114101577B (en) * | 2021-11-24 | 2023-12-29 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN117123729A (en) * | 2023-07-06 | 2023-11-28 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
| CN117123729B (en) * | 2023-07-06 | 2024-05-24 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
| CN116603972A (en) * | 2023-07-20 | 2023-08-18 | 山西三联顺驰汽车配件有限公司 | Regeneration and selection process for Baozhu sand |
| CN116603972B (en) * | 2023-07-20 | 2023-10-31 | 山西三联顺驰汽车配件有限公司 | Regeneration and selection process for Baozhu sand |
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