CN101564719A - Method for reducing surface roughness of light-cured rapid prototype component - Google Patents
Method for reducing surface roughness of light-cured rapid prototype component Download PDFInfo
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- CN101564719A CN101564719A CNA2009100225790A CN200910022579A CN101564719A CN 101564719 A CN101564719 A CN 101564719A CN A2009100225790 A CNA2009100225790 A CN A2009100225790A CN 200910022579 A CN200910022579 A CN 200910022579A CN 101564719 A CN101564719 A CN 101564719A
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Abstract
The invention discloses a physicochemical method for reducing the surface roughness of a light-cured rapid prototype component. The method comprises the following steps that: firstly, resinous varnish is prepared, and the resinous varnish is prepared by adding the following raw materials into resin by mass percentage: less than or equal to 0.1 percent of surfactant, 5 to 30 percent of active diluting agent, and less than or equal to 1 percent of flatting agent; the viscosity of the resinous varnish is adjusted to be between 0.25 and 0.70Pa.S; the resinous varnish is coated on the surface of a solid light-cured resin prototype component by adopting a mode of brush coating, soaking or spraying; and finally, a uniform coat with thickness not more than 300 mu m is formed on the surface of the solid light-cured prototype component through a curing process, so that the surface roughness of the solid light-cured rapid prototype component is reduced to less than 3 mu m from the prior 6 to 15 mu m. The method can eliminate the step effect generated by a solid light-cured method, has simple and convenient operation without affecting the dimensional precision of the solid light-cured rapid prototype component, and has excellent application prospect.
Description
Technical field
The present invention relates to the post-processing approach of photocuring stereo shaping prototype, particularly a kind of method that reduces light-cured rapid prototype component surface roughness, this method is handled the prototype surface by physico-chemical process, with quick reduction prototype component surface roughness.
Background technology
Rapid shaping technique is based on the processing molding method that material adds up, and rapid shaping technique can be accelerated weeding out the old and bring forth the new of product, shortens design, the production cycle of product.Cubic light curing molding method is most widely used in the present multiple quick molding method, a kind of method that precision is the highest, it has the make efficiency height, and stock utilization is near 100% advantage, can forming shape complicated (as hollow parts), meticulous especially part especially.But still can there be the accuracy error that is caused by step effect in the forming process in the prototype surface after the moulding, and this is relevant with the add up operation principle of moulding of cubic light curing molding method material, is inevitable.
Basically all be at present both at home and abroad by software in the moulding process, hardware, the optimization of parameter etc. improves the prototype precision in moulding material and the forming process, but the cost of these optimizations is raisings of cost, and can only reduce the influence of step effect, and can not fundamentally eliminate the step effect.By aftertreatment technology prototype is handled, can be remedied, reduce the error that causes by the step effect, compare and significantly reduced production cost, shortened manufacturing time by increasing the method that the number of plies improves precision in type step effect.Aftertreatment technology commonly used at present has polishing, machining modes such as machinery secondary operations, its shortcoming is to reserve allowance when moulding, utilize machining to come after-treatment, need expend great amount of manpower, material resources have further increased processing cost, are not suitable for the part of surface configuration more complicated simultaneously.
According to the data-searching that the applicant carried out, so far also not about the prototype surface being handled to reduce the pertinent literature and the patent of prototype component surface roughness by physico-chemical process.
Summary of the invention
The objective of the invention is to, a kind of method that adopts physical-chemical process to reduce sl prototype spare surface roughness is provided.This method by cold coating preparation and be coated with the adjustment of hanging technology three-dimensional sl prototype spare carried out post processing, solidify the prototype surface in cubic light and form uniform coating.This coating influences the dimensional accuracy of prototype as thin as a wafer and not, can reduce in a short period of time to reduce prototype component surface roughness by the inevitable caused foozle of step effect in the forming process; When moulding, need not to reserve allowance, save cost, guaranteed the dimensional accuracy of part; This method is compared with process for machining such as grindings, does not have the influence of second order error.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of physico-chemical process that reduces three-dimensional light-cured rapid prototype component surface roughness is characterized in that, comprises the following steps:
At first prepare cold coating, the preparation method of this cold coating adds following raw materials according by the light-cured resin mass percent in resin: surfactant :≤0.1%, and reactive diluent: 5%～30%, levelling agent≤1%; And regulate cold coating viscosity between 0.25Pa.S～0.70Pa.S;
Adopt the mode of brushing, soaking into or spraying to be coated with cold coating and hang over cubic light cured resin prototype surface;
Solidify the prototype surface by curing process in cubic light then and form the uniform coating that thickness is no more than 300 μ m.
Method of the present invention can make three-dimensional light-cured rapid prototype component surface roughness be reduced in the 3 μ m from 6 original μ m～15 μ m.Eliminated the step effect that the cubic light solidification method produces, easy and simple to handle, and saved production cost greatly, and do not influence the dimensional accuracy of three-dimensional light-cured rapid prototype component, have a good application prospect, make rapid shaping spare better application in process of manufacture.
Description of drawings
Fig. 1 is coated with to hang by cold coating to reduce the prototype component surface roughness schematic diagram;
The present invention is described in further detail below in conjunction with embodiment that accompanying drawing and inventor provide.
The specific embodiment
The present invention has provided a kind of physico-chemical process that solidifies prototype component surface roughness based on the reduction cubic light of photocuring stereo shaping technology, this method is at first by preparation photocuring or cold setting resin coating, this dope viscosity is lower, have certain wetability and levelability, can form very thin uniform coating on the prototype surface; Secondly cold coating is coated with extensions (soak into, brush or spray) in light-cured resin prototype surface, make surperficial unnecessary resin outflow by certain technology (inversion dry up or rotate drying) after, make face coat curing by corresponding curing process.
The present invention adopts following technological process (as shown in Figure 1):
1) prepare cold coating, the preparation method of this cold coating adds following raw materials according by the light-cured resin mass percent in resin: surfactant :≤0.1%, and reactive diluent: 5%～30%, levelling agent≤1%; And regulate cold coating viscosity between 0.25Pa.S～0.70Pa.S;
2) cold coating is adopted the mode of brushing, soaking into or spraying be coated with and hang over cubic light cured resin prototype surface;
3) surperficial unnecessary resin is flowed out;
4) by photocuring curing modes such as (normal temperature cures) cubic light cured resin prototype face coat is solidified, solidify the prototype surfaces externally and internally in cubic light and form one deck uniform coating as thin as a wafer, thereby reduce the influence of step effect, reduce prototype component surface roughness.Method of the present invention does not need secondary machine, saves cost, and makes the prototype surface reach the precision of technical grade.
Curing process of the present invention is cured colophony prototype spare face coat at short notice.By the adjustment of curing process, make the dimensional accuracy that coating is solidified does not influence prototype itself.Adopt high-pressure sodium lamp to solidify during photocuring, hardening time is short, and quality is good, resin is carried out deep layer solidify; After finishing, curing by the low pressure uviol lamp top layer is cured again, by the control assurance coating quality of hardening time.Normal temperature cure is regulated hardening time by the preparation of cold coating, can quicken to solidify by little heating (being no more than colophony prototype spare deformation temperature).
What below be that the inventor provides is the specific embodiment of example with the light solidifying coating.
Embodiment 1:
1. allotment cold coating
(1). cold coating is modulated by following several respects:
1) in existing light-cured resin, adds surfactant JFC (APEO compounds, addition are no more than light-cured resin quality 0.1%), add thermal agitation or adopt other chemical methodes to make light-cured resin generation chemical modification.
2) in light-cured resin, add commercially available reactive diluent HDDA (1, the 6-hexanediyl ester, addition be resin quality 10%), to reduce resin viscosity.
3) in light-cured resin, add commercially available UV levelling agent 4325 (addition be no more than resin quality 1%) again, to improve the trickling of resin.
4) regulate cold coating viscosity in 0.70Pa.S, make the resinous coat best performance, step surface can filled and led up and formed one deck coating as thin as a wafer fully, and certain absorption affinity is arranged between paint coatings and the step surface.Allocated after the cold coating, placed more than 30 minutes, treated to carry out again behind the bubble collapse in the resin next step technology.
2. be coated with extension technology
Solidify the prototype surface in molded cubic light and be coated with extension, the basic process of photocuring stereo shaping prototype moulding is:
At first utilize CAD 3D modeling software design resin part, by special computer section software three-dimensional CAD model is cut into plurality of thin layer plane graph data again.
When photocuring rapid prototyping begins, lifting platform drops to apart from liquid level usually less than 0.1mm (a few tenths of approximately millimeter, the thickness that is equivalent to the section of cad model basecoat) locate, the x-y laser scanner scans liquid level according to the graphics plane data of ground floor (being basecoat) section subsequently, and that part of liquid resin that this one deck of liquid level is shone by laser is owing to light polymerization is solidificated on the lifting platform.Then lowering or hoisting gear drives lifting platform again and makes its decline be equivalent to the height of second layer slice thickness, the x-y laser scanner scans liquid level according to the graphics plane data of second layer section again, on the resin that one deck had solidified before new one deck liquid resin curing also tightly was bonded at, stack successively forms the resin part.
Being coated with and hanging technology is in the certain thickness coating of three-dimensional light-cured rapid prototype component surface-coated, can realize by following several modes:
1) brushes technology
Brush technology and mainly be suitable for handling simple and the not high outer surface of required precision, its processing step is to brush suitable thickness with the cold coating that fine, soft fur brush will prepare uniformly on three-dimensional light-cured rapid prototype component to be processed surface, is cured after placing 10 minutes under 50 ℃ the temperature not being higher than.
2) soak into technology
This soaks into technology and is applicable to all surface, and concrete operations are as follows:
The prototype of forming is taken out from make-up machine, remove support, remove cubic light and solidify the remaining resin in prototype surface (mainly be to use alcohol, chemical reagent such as acetone solidify cleaning to the prototype cubic light); Again three-dimensional light-cured rapid prototype component is placed the cold coating for preparing in advance, soak into certain hour (about 5 minutes), make three-dimensional light-cured rapid prototype component surface soak into and to have an amount of cold coating to be coated with fully and be hung on three-dimensional light-cured rapid prototype component surface, subsequently three-dimensional light-cured rapid prototype component is taken out, and hang to be inverted and dry up or rotate to dry and handle, surperficial unnecessary cold coating is flowed out, treat that three-dimensional light-cured rapid prototype component surface excess resin coating flows out the back three-dimensional light-cured rapid prototype component face coat is cured.
3) spraying coating process
This spraying coating process is applicable to the inner surface of cubic light curing prototype outer surface and wide-mouth, its process is that deployed cold coating is loaded in the spray equipment that has designed, cold coating is sprayed at three-dimensional light-cured rapid prototype component surface, spraying once more after the curing; Spraying meets the requirements until coating surface for several times.
3. curing process
Ultraviolet curing process is that the cubic light that cleaning is good is solidified prototype and soaked in light-cured resin coating about 5 minutes, after soaking into well cubic light being solidified prototype takes out from light-cured resin coating, be inverted 3 minutes (visual cubic light of inversion time solidify the size of prototype and complex-shaped degree and adjust), treat that unnecessary resin flows out on the cubic light curing prototype surface, to apply good cubic light curing prototype when coating is stablized at once and be placed on curing fast under the high-pressure sodium lamp, be 150 seconds hardening time, and deep layer is solidified; And then be put under the low pressure mercury lamp to solidify and more than 3 hours the top layer be cured, curing is finished.
Embodiment 2:
Different is for present embodiment and embodiment 1: add commercially available reactive diluent HDDA (1 in light-cured resin, the 6-hexanediyl ester, addition be resin quality 8%), add surfactant JFC (APEO compounds, addition be the light-cured resin quality 0.5%), regulate cold coating viscosity about 0.60Pa.S, all the other are all with embodiment 1.
Embodiment 3:
Different is for present embodiment and embodiment 1: add commercially available reactive diluent HDDA (1 in light-cured resin, the 6-hexanediyl ester, addition be resin quality 15%), add surfactant JFC (APEO compounds, addition be the light-cured resin quality 0.8%), regulate cold coating viscosity about 0.40Pa.S, all the other are all with embodiment 1.
Embodiment 4:
Different is for present embodiment and embodiment 1: add commercially available reactive diluent HDDA (1 in light-cured resin, the 6-hexanediyl ester, addition be resin quality 20%), add surfactant JFC (APEO compounds, addition be the light-cured resin quality 0.7%), regulate cold coating viscosity about 0.35Pa.S, all the other are all with embodiment 1.
Embodiment 5:
Different is for present embodiment and embodiment 1: add commercially available reactive diluent HDDA (1 in light-cured resin, the 6-hexanediyl ester, addition be resin quality 30%), add surfactant JFC (APEO compounds, addition be the light-cured resin quality 0.5%), regulate cold coating viscosity about 0.25Pa.S, all the other are all with embodiment 1.
Claims (9)
1. a physico-chemical process that reduces three-dimensional light-cured rapid prototype component surface roughness is characterized in that, comprises the following steps:
At first prepare cold coating, the preparation method of this cold coating adds following raw materials according by the light-cured resin mass percent in resin: surfactant :≤0.1%, and reactive diluent: 5%～30%, levelling agent≤1%; And regulate cold coating viscosity between 0.25Pa.S～0.70Pa.S;
Adopt the mode of brushing, soaking into or spraying to be coated with cold coating and hang over cubic light cured resin prototype surface;
Solidify the prototype surface by curing process in cubic light then and form the uniform coating that thickness is no more than 300 μ m.
2. the method for claim 1 is characterized in that, described reactive diluent is 1, the 6-hexanediyl ester, and described surfactant is the APEO compounds, and described levelling agent is a UV levelling agent 4325.
3. the method for claim 1 is characterized in that, described brushing method is: with fine, soft fur brush cold coating is solidified on the prototype surface in cubic light and brush suitable thickness uniformly, be cured after placing 10 minutes under 50 ℃ the temperature not being higher than.
4. the method for claim 1 is characterized in that, the described method of soaking into is: the cubic light of forming is solidified prototype take out from make-up machine, remove support, remove cubic light and solidify the remaining resin in prototype surface; Again cubic light is solidified prototype and place cold coating, soaked into 5 minutes, make cubic light curing prototype surface soak into and to have an amount of cold coating to be coated with fully and be hung on cubic light curing prototype surface, subsequently cubic light being solidified prototype takes out, and hang to be inverted and dry up or rotate to dry and handle, surperficial unnecessary cold coating is flowed out, treat after cubic light is solidified the excess resin coating outflow of prototype surface face coat to be cured.
5. the method for claim 1 is characterized in that, described spraying method is: cold coating is loaded in the spray equipment, directly is sprayed at cubic light and solidifies the prototype surface, form one deck cold coating layer, treat to spray once more after cold coating solidifies; Meet the requirements until coating surface.
6. method as claimed in claim 4 is characterized in that, described suspension is inverted and is dried up or rotate that to dry the processing time that surperficial unnecessary cold coating is flowed out be 3 minutes.
7. the method for claim 1 is characterized in that, described curing process adopts normal temperature cure, is heating and curing or adopts the photocuring mode to carry out.
8. method as claimed in claim 7 is characterized in that, described photocuring mode is: be placed on earlier under the high-pressure sodium lamp and solidified 5 minutes, place under the low pressure uviol lamp again and solidify more than 3 hours.
9. method as claimed in claim 7 is characterized in that, described normal temperature or the temperature when being heating and curing mode are no more than 50 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100225790A CN101564719A (en) | 2009-05-18 | 2009-05-18 | Method for reducing surface roughness of light-cured rapid prototype component |
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| CNA2009100225790A CN101564719A (en) | 2009-05-18 | 2009-05-18 | Method for reducing surface roughness of light-cured rapid prototype component |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107825715A (en) * | 2017-12-14 | 2018-03-23 | 广州形优科技有限公司 | A kind of method for improving Polyjet technology transparent material printer model transparencies |
| CN109054071A (en) * | 2018-07-20 | 2018-12-21 | 宁波市石生科技有限公司 | A kind of aftertreatment technology of 3D printing part |
| CN109080133A (en) * | 2018-07-20 | 2018-12-25 | 宁波市石生科技有限公司 | A kind of aftertreatment technology of the 3D printing part of photocuring 3D printing manufacture |
| CN110997167A (en) * | 2017-07-26 | 2020-04-10 | 3M创新有限公司 | Method of making a physical object by additive manufacturing |
| CN112533749A (en) * | 2018-08-06 | 2021-03-19 | 库尔塞尔公司 | Method for manufacturing a component using a stereolithography method |
| CN113910599A (en) * | 2021-09-14 | 2022-01-11 | 杭州正向增材制造技术有限公司 | Three-dimensional part and method for producing same |
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2009
- 2009-05-18 CN CNA2009100225790A patent/CN101564719A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110997167A (en) * | 2017-07-26 | 2020-04-10 | 3M创新有限公司 | Method of making a physical object by additive manufacturing |
| US11433658B2 (en) | 2017-07-26 | 2022-09-06 | 3M Innovative Properties Company | Method of making a physical object by additive manufacturing |
| CN107825715A (en) * | 2017-12-14 | 2018-03-23 | 广州形优科技有限公司 | A kind of method for improving Polyjet technology transparent material printer model transparencies |
| CN109054071A (en) * | 2018-07-20 | 2018-12-21 | 宁波市石生科技有限公司 | A kind of aftertreatment technology of 3D printing part |
| CN109080133A (en) * | 2018-07-20 | 2018-12-25 | 宁波市石生科技有限公司 | A kind of aftertreatment technology of the 3D printing part of photocuring 3D printing manufacture |
| CN112533749A (en) * | 2018-08-06 | 2021-03-19 | 库尔塞尔公司 | Method for manufacturing a component using a stereolithography method |
| CN112533749B (en) * | 2018-08-06 | 2023-02-17 | 库尔塞尔公司 | Method for manufacturing a component using a stereolithography method |
| CN113910599A (en) * | 2021-09-14 | 2022-01-11 | 杭州正向增材制造技术有限公司 | Three-dimensional part and method for producing same |
| CN113910599B (en) * | 2021-09-14 | 2023-12-19 | 浙江正向增材制造有限公司 | Three-dimensional part and method for producing the same |
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