CN105216328A - The surperficial finishing process method of selective laser sintering polystyrene casting mould - Google Patents
The surperficial finishing process method of selective laser sintering polystyrene casting mould Download PDFInfo
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- CN105216328A CN105216328A CN201510708442.6A CN201510708442A CN105216328A CN 105216328 A CN105216328 A CN 105216328A CN 201510708442 A CN201510708442 A CN 201510708442A CN 105216328 A CN105216328 A CN 105216328A
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Abstract
The invention provides a kind of surperficial finishing process method of selective laser sintering polystyrene casting mould, comprise the steps: powder clearly, be specially, remove the unnecessary Polystyrene powder of article surface, remove the support section of article surface; Surface sand-blasting, is specially, and adopts polystyrene powder foot couple article surface to carry out blasting treatment; Polishing, is specially, polishes with sand paper to article surface; Wax process, is specially, and is melted completely by paraffin, product is put into wax pond and soaks into completely, forms wax layer at article surface; Drying, carries out natural drying by product; Polishing, is specially, and after product is done solid work, polishing article surface, by the polishing of the thickness of described wax layer to setting thickness.The surface smoothness of surperficial finishing process method to product casting mould prototype of selective laser sintering polystyrene casting mould provided by the invention achieves and significantly promotes, and improves properties of product, meets the instructions for use of part.
Description
Technical field
The present invention relates to field of surface treatment, particularly, relate to a kind of surperficial finishing process method of selective laser sintering polystyrene casting mould.
Background technology
Selective laser sintering SLS is with solid powder material direct forming Three-dimensional Entity Components, not by the restriction of part shape complexity, without any need for moulds of industrial equipment, cad model is directly converted to physical prototypes part.In theory, any be heated after the powder that can bond can be used as the raw material that SLS sinters Quick-forming.Because the diversity of SLS moulding material, product intensity are high, of many uses, forming process without the need to supporting, stock utilization high, so its range of application is increasingly extensive, receive the extensive attention of industry-by-industry.Its operation principle is, first CAD 3D model is set up, and be converted into stl file, layered shaping is carried out by delamination software, obtain cross section and profile information, and be converted into laser scanning track, control the powder of laser beam to model solid section and scan, make powder particles fuse and adhered to one another, progressively obtain the profile of this layer.After completing one deck scanning, workbench declines one deck depth of section, then carries out paving powder and the sintering of lower one deck, finally forms threedimensional model.
The shaping rear part strength of selective laser sintering SLS product is lower, and is loose porous, and surface roughness is approximately Ra12.5, and part performance and surface smoothness can not meet actual operation requirements.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of surperficial finishing process method of selective laser sintering polystyrene casting mould.The invention solves selective laser sintering product in prior art shaping after, part performance and surface smoothness situation do not reach the problem of instructions for use.
According to the surperficial finishing process method of selective laser sintering polystyrene casting mould provided by the invention, comprise the steps:
Step S1: clear powder, is specially, and removes the unnecessary Polystyrene powder of article surface, removes the support section of article surface;
Step S2: surface sand-blasting, is specially, and adopts polystyrene powder foot couple article surface to carry out blasting treatment;
Step S3: polishing, is specially, polishes with sand paper to article surface;
Step S4: wax process, is specially, and is melted completely by paraffin, puts into wax pond product and soaks into completely, forms wax layer at article surface;
Step S5: dry, is specially, product is carried out natural drying;
Step S6: polishing, is specially, after product is done solid work, polishing article surface, by the polishing of the thickness of described wax layer to setting thickness.
Preferably, in step S1, be specially, the pallet filling product be placed on ventilation operation platform, brush away the unnecessary Polystyrene powder of article surface with banister brush, remove the support section of product simultaneously with file.
Preferably, also comprise the steps: in described step S2
Step S201: the compressed air valve opening sand-blasting machine, controls air pressure≤0.8Mpa;
Step S202: working chamber product being put into sand-blasting machine, blows away article surface and the inner all excessive powder of product die cavity with spray gun.
Preferably, comprise the steps: in described step S3
Step S301: in No. 180 to No. 360 sand paper, at least select two or more sand paper;
Step S302: by thick extremely thin order, article surface is polished by sand paper.
Preferably, comprise the steps: in described step S4
Step S401: open waxdip machine in 5 hours in advance, waxdip machine temperature is set to 80 DEG C, paraffin melts rear insulation completely treats that wax temperature is stablized for 30 minutes;
Step S402: be placed in by product in waxdip frock, puts into wax pond, and subsidence velocity should to inhale wax speed consistent with product; Ensure paraffin complete submergence product 5mm ~ 10mm, leave standstill 5min ~ 10min, treat that bubble-free is overflowed, then slow waxdip frock is proposed wax pond, taking out and overturn product, removing unnecessary paraffin, is the wax layer of 40 ~ 50 μm at article surface formation thickness.
Preferably, in step s 6, the setting thickness of described wax layer is 20 ~ 35 μm; No. 1000 sand paper are adopted to carry out the polishing of wax floor.
Preferably, described step S5, is specially, the product after waxdip is positioned over clean, dustless, dry, ventilate, free of contamination indoor carry out natural drying 2 ~ 3 hours.
Preferably, in step s 2, the Polystyrene powder granularity requirements that sandblasting is used is 80 ~ 100 orders.
Compared with prior art, the present invention has following beneficial effect:
The surface smoothness of surperficial finishing process method to product casting mould prototype of selective laser sintering polystyrene casting mould provided by the invention achieves and significantly promotes, article surface intensity is promoted to 6.4MPa by 1.84MPa, improve properties of product, meet the instructions for use of part.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is flow chart of steps of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
For meeting the needs of Aerospace Products parts with complex structures casting, selective laser sintering SLS process is utilized to manufacture wax-pattern, then the complexity control shape core or mould that obtain is cast, described selecting property laser sintered SLS process can manufacture the singular structure that traditional manufacture cannot be processed, as multilayer nest and closed interior cavity etc.
In the present embodiment, the surperficial finishing process method of selective laser sintering polystyrene casting mould provided by the invention, comprises the steps:
Step S1: clear powder, is specially, and removes the unnecessary Polystyrene powder of article surface, removes the support section of article surface simultaneously;
Step S2: surface sand-blasting, is specially, and adopts polystyrene powder foot couple article surface to carry out blasting treatment;
Step S3: polishing, is specially, polishes with sand paper to article surface;
Step S4: wax process, is specially, and is melted completely by paraffin, puts into wax pond product and soaks into completely, forms wax layer at article surface;
Step S5: dry, is specially, product is carried out natural drying;
Step S6: polishing, is specially, after product is done solid work, polishing article surface, by the polishing of the thickness of described wax layer to setting thickness.
In step s 2, the Polystyrene powder granularity requirements that sandblasting is used is 80 ~ 100 orders.
In one preferably embodiment, in step S1, be specially, the pallet filling product be placed on ventilation operation platform, brush away the unnecessary Polystyrene powder of article surface with banister brush, remove the support section of product simultaneously with file.
In one preferably embodiment, comprise the steps: in described step S2
Step S201: the compressed air valve opening sand-blasting machine, controls air pressure≤0.8Mpa;
Step S202: working chamber product being put into sand-blasting machine, blows away article surface and the inner all excessive powder of product die cavity with spray gun.Especially the position of structure relative complex.Will note air pressure with during gas, especially thin-wall part is more careful.
In one preferably embodiment, comprise the steps: in described step S3
Step S301: in No. 180 to No. 360 sand paper, at least select two or more sand paper;
Step S302: by thick extremely thin order, article surface is polished by sand paper.Until article surface is smooth to the touch.
In one preferably embodiment, comprise the steps: in described step S4
Step S401: open waxdip machine in 5 hours in advance, waxdip machine temperature is set to 80 DEG C, paraffin melts rear insulation completely treats that wax temperature is stablized for 30 minutes;
Step S402: be placed in by product in waxdip frock, puts into wax pond, and subsidence velocity should to inhale wax speed consistent with product.Ensure paraffin complete submergence product 5mm ~ 10mm, leave standstill 5min ~ 10min, treat that bubble-free is overflowed, then slow waxdip frock is proposed wax pond, taking out and overturn product, removing unnecessary paraffin, is the wax layer of 40 ~ 50 μm at article surface formation thickness.
In one preferably embodiment, in step s 6, the setting thickness of described wax layer is 20 ~ 35 μm; No. 1000 sand paper are adopted to carry out the polishing of wax floor.
In one preferably embodiment, described step S5, is specially, the product after waxdip is positioned over clean, dustless, dry, ventilate, free of contamination indoor carry out natural drying 2 ~ 3 hours.
Adopting process parameter to be laser power is 10W, sweep speed 1800mm/s, slice thickness 0.15mm, forming temperature 98 DEG C preparation SLS polystyrene impeller mold, in formation cylinder, naturally cool 3 hours after part has sintered to take out, according to the surperficial finishing process method of selective laser sintering polystyrene casting mould provided by the invention, surface treatment is carried out to product.The surface smoothness of product is increased dramatically after treatment, and article surface intensity is promoted to 6.4MPa by 1.84MPa.
Adopting process parameter to be laser power is 13W, sweep speed 2000mm/s, slice thickness 0.18mm, the thin-wall tube-shaped structure mold of forming temperature 100 DEG C preparation SLS polystyrene, in formation cylinder, naturally cool 2 hours after part has sintered to take out, according to the surperficial finishing process method of selective laser sintering polystyrene casting mould provided by the invention, surface treatment is carried out to product.The surface smoothness of product is increased dramatically after treatment, and article surface intensity is promoted to 6.4MPa by 1.84MPa.
Process parameter is adopted to be 15W for swashing laser power, sweep speed 1600mm/s, slice thickness 0.20mm, forming temperature 90 DEG C preparation SLS polystyrene impeller mold, in formation cylinder, naturally cool 5 hours after part has sintered to take out, according to the surperficial finishing process method of selective laser sintering polystyrene casting mould provided by the invention, surface treatment is carried out to product.The surface smoothness of product is increased dramatically after treatment, and article surface intensity is promoted to 6.4MPa by 1.84MPa.
In sum, the surface smoothness of surperficial finishing process method to product casting mould prototype of selective laser sintering polystyrene casting mould provided by the invention achieves and significantly promotes, article surface intensity is promoted to 6.4MPa by 1.84MPa, improve properties of product, meet the instructions for use of part.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. a surperficial finishing process method for selective laser sintering polystyrene casting mould, is characterized in that, comprise the steps:
Step S1: clear powder, is specially, and removes the unnecessary Polystyrene powder of article surface, removes the support section of article surface;
Step S2: surface sand-blasting, is specially, and adopts polystyrene powder foot couple article surface to carry out blasting treatment;
Step S3: polishing, is specially, polishes with sand paper to article surface;
Step S4: wax process, is specially, and is melted completely by paraffin, puts into wax pond product and soaks into completely, forms wax layer at article surface;
Step S5: dry, is specially, product is carried out natural drying;
Step S6: polishing, is specially, after product is done solid work, polishing article surface, by the polishing of the thickness of described wax layer to setting thickness.
2. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, it is characterized in that, in step S1, be specially, the pallet filling product is placed on ventilation operation platform, brush away the unnecessary Polystyrene powder of article surface with banister brush, remove the support section of product simultaneously with file.
3. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, is characterized in that, also comprise the steps: in described step S2
Step S201: the compressed air valve opening sand-blasting machine, controls air pressure≤0.8Mpa;
Step S202: working chamber product being put into sand-blasting machine, blows away article surface and the inner all excessive powder of product die cavity with spray gun.
4. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, is characterized in that, comprise the steps: in described step S3
Step S301: in No. 180 to No. 360 sand paper, at least select two or more sand paper;
Step S302: by thick extremely thin order, article surface is polished by sand paper.
5. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, is characterized in that, comprise the steps: in described step S4
Step S401: open waxdip machine in 5 hours in advance, waxdip machine temperature is set to 80 DEG C, paraffin melts rear insulation completely treats that wax temperature is stablized for 30 minutes;
Step S402: be placed in by product in waxdip frock, puts into wax pond, and subsidence velocity should to inhale wax speed consistent with product; Ensure paraffin complete submergence product 5mm ~ 10mm, leave standstill 5min ~ 10min, treat that bubble-free is overflowed, then slow waxdip frock is proposed wax pond, taking out and overturn product, removing unnecessary paraffin, is the wax layer of 40 ~ 50 μm at article surface formation thickness.
6. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, is characterized in that, in step s 6, the setting thickness of described wax layer is 20 ~ 35 μm; No. 1000 sand paper are adopted to carry out the polishing of wax floor.
7. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, it is characterized in that, described step S5, is specially, the product after waxdip is positioned over clean, dustless, dry, ventilate, free of contamination indoor carry out natural drying 2 ~ 3 hours.
8. the surperficial finishing process method of selective laser sintering polystyrene casting mould according to claim 1, is characterized in that, in step s 2, sandblasting Polystyrene powder granularity requirements used is 80 ~ 100 orders.
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| CN201510708442.6A CN105216328A (en) | 2015-10-27 | 2015-10-27 | The surperficial finishing process method of selective laser sintering polystyrene casting mould |
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| CN201510708442.6A CN105216328A (en) | 2015-10-27 | 2015-10-27 | The surperficial finishing process method of selective laser sintering polystyrene casting mould |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639208A (en) * | 2017-10-12 | 2018-01-30 | 界首市华腾金属铸造有限公司 | A kind of preparation method of alloy evaporative pattern eps foam mould |
| CN109397701A (en) * | 2018-10-25 | 2019-03-01 | 北京易加三维科技有限公司 | The method for reducing selective laser sintering printout surface roughness by heating liquid medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000330468A (en) * | 1999-05-18 | 2000-11-30 | Hitachi Ltd | Manufacture of model and apparatus therefor |
| CN103521773A (en) * | 2013-09-25 | 2014-01-22 | 深圳光韵达光电科技股份有限公司 | Post-processing technology for SLS workpiece surface |
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2015
- 2015-10-27 CN CN201510708442.6A patent/CN105216328A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000330468A (en) * | 1999-05-18 | 2000-11-30 | Hitachi Ltd | Manufacture of model and apparatus therefor |
| CN103521773A (en) * | 2013-09-25 | 2014-01-22 | 深圳光韵达光电科技股份有限公司 | Post-processing technology for SLS workpiece surface |
Non-Patent Citations (1)
| Title |
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| 王雅先: "《激光选区快速成型件后处理工艺的试验研究》", 《新技术新工艺》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639208A (en) * | 2017-10-12 | 2018-01-30 | 界首市华腾金属铸造有限公司 | A kind of preparation method of alloy evaporative pattern eps foam mould |
| CN109397701A (en) * | 2018-10-25 | 2019-03-01 | 北京易加三维科技有限公司 | The method for reducing selective laser sintering printout surface roughness by heating liquid medium |
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Application publication date: 20160106 |