TW201706116A - Surface finishing method for 3D printed object - Google Patents

Abstract

A surface finishing method for 3D printed object including the following steps is provided. A 3D printed object is provided and is arranged on the platform. The 3D printed object is surface finished with a blasting material unit. A blasting material which is blasted onto a first surface of the 3D printed object comprises sand and coloring material, such that the first surface of the 3D printed object is smoothed by the sand to form a second surface and the coloring material is adhered onto the second surface.

Description

Surface treatment method for three-dimensional printing objects

The present invention relates to a surface treatment method, and more particularly to a surface treatment method for a three-dimensionally printed article.

In recent years, with the maturity of three-dimensional printing technology and its application, the three-dimensional objects produced by three-dimensional printing technology have been greatly improved in terms of precision and strength, so it is gradually adopted by the manufacturing industry or industry. A generation of forward-looking manufacturing technology.

Generally, the three-dimensional printing process is to first take out a plurality of two-dimensional slice contours from the three-dimensional image file of the object to be formed, and then process the three-dimensional object layer by layer according to the respective two-dimensional slice contours. The manufacturing method of constructing a three-dimensional object by stacking by layer-by-layer stacking is called laminated manufacturing. However, three-dimensional printing articles generally have a problem of poor surface roughness, and post-processing procedures such as surface polishing are usually required.

The invention provides a surface treatment method for a three-dimensional printing article, which comprises the following steps. Provide 3D printed objects on the work platform. The surface of the three-dimensional printed object is surface treated by a sand blasting unit. The blasting unit sprays the first surface of the three-dimensional printing material with the sand particles and the coloring material, so that the first surface of the three-dimensional printing material is leveled by the sanding material into a second surface, and the coloring material is attached to the three-dimensional printing The second surface of the object.

In an embodiment of the invention, the weight percentage of the sand particles is between 70% and 95%, and the weight percentage of the coloring material is between 5% and 30%.

In an embodiment of the invention, the blasting unit has an injection direction, and the injection direction has an angle with the bearing surface of the working platform for carrying the three-dimensional printing object.

In an embodiment of the invention, the angle is between 5 and 45 degrees when the first surface of the three-dimensional print is leveled through the sand.

In an embodiment of the invention, the angle of inclusion is between 70 and 90 degrees when the colorant is attached to the second surface of the three-dimensional print.

In an embodiment of the invention, the angle between the jetting direction when the sandpaper is leveled on the first surface of the three-dimensional print and the bearing surface of the work platform is smaller than the second angle at which the coloring material is attached to the three-dimensional print. The angle between the jet direction of the surface and the bearing surface of the work platform.

In an embodiment of the invention, the material of the sand particles comprises alumina, cerium oxide, titanium oxide or stainless steel.

In an embodiment of the invention, the coloring material comprises an acrylic pigment, a dye, a dye, a toner, a copper powder, an aluminum powder or a tin powder.

In an embodiment of the invention, the surface treatment method of the three-dimensional printed matter further comprises recycling the spray material and/or the material removed from the surface of the three-dimensional print using the recovery device.

In an embodiment of the invention, the blasting unit comprises a dry blaster or a wet blaster.

Based on the above, the surface treatment method of the three-dimensionally printed article of the present invention is mainly to trim the surface of the three-dimensionally printed article by sand blasting. Since the sand used in the blasting process is mixed with the coloring material, when the sand is sprayed on the surface of the three-dimensional printing object, the surface roughness of the three-dimensional printing object can be reduced, and the coloring material can be attached to the three-dimensional printing object. s surface.

The above described features and advantages of the invention will be apparent from the following description.

Before the three-dimensional printing object 10 is produced by using the three-dimensional printing and molding machine of any of the foregoing three-dimensional printing manufacturing technologies, a plurality of two-dimensional cutting contours are first extracted from the three-dimensional image file of the object to be formed, and then according to each two-dimensional The sliced profile is machined into a three-dimensionally printed article 10 in a layer-by-layer stack. As shown in FIG. 1, the three-dimensional printed matter 10 is, for example, stacked by a plurality of sub-layers 11, and any two adjacent sub-layers 11 have a clear boundary line between them, so that the three-dimensional printed matter 10 is composed of these sub-layers. The first surface 10a defined by the circumferential surface of 11 has a problem of poor surface roughness.

Next, referring to FIG. 2, the first surface 10a of the three-dimensional printed object 10 is surface-treated by the blasting unit 30. In the present embodiment, the blasting unit 30 may be a dry blasting machine or a wet blasting machine, and the blasting material 31 sprayed on the first surface 10a of the three-dimensional printing article 10 includes sand particles 31a and coloring material 31b. For example, the material of the sand 31a may include aluminum oxide, cerium oxide, titanium oxide or stainless steel, and the coloring material 31b may include an acrylic pigment, a dye, a dye, a toner, a copper powder, an aluminum powder or a tin powder. On the other hand, the weight percentage of the sand particles 31a to the spray material 31 is approximately between 70% and 95%, and the color material 31b is approximately between 5% and 30% by weight of the spray material 31. It is worth mentioning that in order to obtain a significant improvement in the roughness of the first surface 10a of the three-dimensional print object 10, the pattern of the sand particles 31a sprayed on the first surface 10a of the three-dimensional print object 10 is mostly granular, beads. Shape, globular or irregular.

In detail, when the first surface 10a of the three-dimensional print 10 is leveled by the sand 31a to be the second surface 10b (shown in FIG. 3), the spray direction D of the sandblasting unit 30 and the load of the work platform 20 are required. The face 21 is sandwiched by a first angle A1, wherein the first angle A1 is approximately between 5 and 45 degrees. Referring to FIG. 2 and FIG. 3 simultaneously, after the first surface 10a of the three-dimensional print 10 is leveled into the second surface 10b by the sand 31a, the original boundary line on the first surface 10a and irregular irregularities (ie, The portion of the surface 10a that is not intended to be formed is removed, so that the surface roughness of the three-dimensional print 10 can be effectively reduced. That is, the second surface 10b has a better surface roughness than the first surface 10a.

After the first surface 10a is leveled into the second surface 10b, the angle between the injection direction D of the sandblasting unit 30 and the bearing surface 21 of the work platform 20 needs to be adjusted from the first angle A1 as shown in FIG. The second angle A2 shown in 3. In the present embodiment, the second angle A2 is approximately between 70 degrees and 90 degrees, and is, for example, greater than the first angle A1. In detail, the spray direction D of the blasting unit 30 is sandwiched with the bearing surface 21 of the work platform 20 by a first angle A1, that is, the spray material 31 is sprayed onto the first surface 10a of the three-dimensional print 10 at a relatively low angle. It helps to increase the efficiency of the sand 31a to smooth the first surface 10a of the three-dimensional print 10. On the other hand, the ejection direction D of the blasting unit 30 is placed at a second angle A1 with the bearing surface 21 of the work platform 20, that is, the spray 31 is sprayed onto the second surface 10b of the three-dimensional print 10 at a relatively high angle. The coloring material 31b sprayed on the second surface 10b is subjected to impact by the sand particles 31a having high kinetic energy to be surely attached to the second surface 10b of the three-dimensional print material 10. In other words, spraying the spray material 31 onto the second surface 10b of the three-dimensional print 10 at a relatively high angle helps to improve the adhesion of the colorant 31b to the second surface 10b of the three-dimensional print 10. Therefore, the three-dimensional print 10 obtained through the above-described production steps can have not only a uniform surface but also a sandblasted texture, and can exhibit a desired color on a surface having a sandblasted texture.

In the present embodiment, the spray material 31 sprayed on the surface of the three-dimensional print 10 and/or the material removed from the surface of the three-dimensional print 10 can be recovered by the recovery device 40, wherein the recovered spray material 31 and / or material removed from the surface of the three-dimensional print 10 can be reused to reduce manufacturing costs.

In summary, the surface treatment method of the three-dimensional printing article of the present invention mainly corrects the surface of the three-dimensional printing object by sand blasting. Since the sand used in the blasting process is mixed with the coloring material, when the sand is sprayed on the surface of the three-dimensional printing object, the surface roughness of the three-dimensional printing object can be reduced, and the coloring material can be attached to the three-dimensional printing object. s surface.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧3D printed objects
10a‧‧‧ first surface
10b‧‧‧second surface
11‧‧‧Sublayer
20‧‧‧Working platform
21‧‧‧ bearing surface
30‧‧‧ Sandblasting unit
31‧‧‧Spray
31a‧‧‧ sand
31b‧‧‧Coloring material
40‧‧‧Recycling device
A1‧‧‧ first angle
A2‧‧‧second angle
D‧‧‧jet direction

1 to 3 illustrate a process of surface treating a three-dimensionally printed article according to an embodiment of the present invention.

10‧‧‧3D printed objects

10b‧‧‧second surface

20‧‧‧Working platform

21‧‧‧ bearing surface

30‧‧‧ Sandblasting unit

31‧‧‧Spray

31a‧‧‧ sand

31b‧‧‧Coloring material

40‧‧‧Recycling device

A2‧‧‧second angle

D‧‧‧jet direction

Claims (10)

A surface treatment method for a three-dimensional printing object, comprising: providing a three-dimensional printing object on a working platform; and surface treating the three-dimensional printing object by using a sandblasting unit, wherein the sandblasting unit is sprayed on the three-dimensional printing material The first surface of the spray material comprises sand particles and coloring materials, such that the first surface of the three-dimensional print material is flattened into a second surface through the sand particles, and the coloring material is attached to the three-dimensional printed matter. The second surface. The surface treatment method for a three-dimensionally printed article according to claim 1, wherein the weight percentage of the sand is between 70% and 95%, and the weight percentage of the coloring material is between 5% and 30%. between. The surface treatment method of the three-dimensional printing article according to claim 1, wherein the blasting unit has a spraying direction, and the spraying direction and a bearing surface of the working platform for carrying the three-dimensional printing object There is an angle. The surface treatment method for a three-dimensionally printed article according to claim 3, wherein the angle is between 5 and 45 degrees when the first surface of the three-dimensional print is flattened through the sand. The surface treatment method for a three-dimensionally printed article according to claim 3, wherein when the coloring material is attached to the second surface of the three-dimensional print, the angle is between 70 degrees and 90 degrees. . The surface treatment method for a three-dimensionally printed article according to claim 1, wherein the ejection direction and the bearing surface of the working platform when the first surface of the three-dimensional printing material is leveled through the sand The angle of the clip is smaller than the angle between the jetting direction and the bearing surface of the working platform when the coloring material is attached to the second surface of the three-dimensional printing material. The surface treatment method for a three-dimensionally printed article according to claim 1, wherein the material of the grit comprises alumina, cerium oxide, titanium oxide or stainless steel. The surface treatment method for a three-dimensional printed article according to claim 1, wherein the coloring material comprises an acrylic pigment, a dye, a dye, a toner, a copper powder, an aluminum powder or a tin powder. The surface treatment method of the three-dimensional printing article according to claim 1, further comprising: recovering the material and/or the material removed from the surface of the three-dimensional printing material by using a recycling device. The surface treatment method for a three-dimensional printed article according to claim 1, wherein the blasting unit comprises a dry blaster or a wet blaster.