HK1227361A - Colouring method for 3d printing technology - Google Patents

Description

3D Coloring method for printing technology

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a coloring method for a 3D printing technology.

Background

3D printing is a technique for manufacturing products by layer-by-layer printing using powder or curable materials based on digital files, and is in sharp contrast to the subtractive manufacturing techniques used in the conventional manufacturing industry, and 3D printing is an additive manufacturing technique for forming final products by the superposition of layers of materials.

And all 3D printers in the current market are printed by single color, the printed model is in single tone, and the color printing has no mature solution on products and technologies. The colorful printed product is obtained, the colorful 3D printer is used for printing or the monochromatic 3D printer is used for printing and then coloring again at present, the structure of the colorful 3D printer is complex, the cost is improved invisibly, the manufacturing efficiency is reduced, the coloring effect of the color after the monochromatic printing is coated is poor, and the color coating is easy to fade on the surface of the product. The cost of color 3D printing is high, and it is urgently needed to provide a simple 3D printing technology coloring method to reduce the production cost of 3D printed products and improve the manufacturing efficiency.

Disclosure of Invention

The invention aims to: aiming at the defects of the prior art, a coloring method for a 3D printing technology is provided, and coloring for 3D printing is completed by a method with low cost and high efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

the coloring method for the 3D printing technology is characterized in that a product is printed layer by using a 3D printing substrate, and a printing layer is colored after each layer is printed. Through coloring each layer of printing layer to printing the layer and being the unit so that each layer of printing layer can obtain required colour accurately, need not frequently change the 3D of different colours and print the substrate, improve the printing efficiency that polychrome 3D printed widely, and simplified the equipment structure that polychrome 3D printed, reduction equipment cost. Because each printing layer is colored, the colored color is not limited on the surface of a 3D printing finished product, and the condition of color loss caused by coloring only on the surface of the finished product is avoided; compared with the method of only coloring the surface of the finished product, after each printing layer is colored, the color displayed by the printed finished product has more expressive force.

As an improvement of the coloring method of the 3D printing technology, the adopted 3D printing is a laser sintering 3D printing technology or a hot melting molding 3D printing technology. The process of coloring after printing the one deck provides the time of cooling solidification for the printing layer that corresponds, and the ink of coloring can play the cooling effect, and each layer of printing of arriving soon can both the rapid solidification, avoids the deformation of shaping product, improves the accuracy that the product printed.

As an improvement of the coloring method of the 3D printing technology, after the required color is obtained by mixing the primary colors, the required color is sprayed on the printing layer by a color spraying mode after each printing layer. 3D through changing different colours prints 3D printing apparatus of substrate in order to obtain colored printing, because the restriction of equipment complexity and overall arrangement, its removable 3D prints substrate quantity fairly limitedly, the colour that can obtain promptly is fairly limitedly, can obtain more abundant and meticulous color expression through the mode that the primary colour mixes, and color for printing the layer through the mode of spouting the look, prevent to color equipment and print layer direct contact, avoid causing the deformation of printing the layer, in order to guarantee the accuracy of printing.

As an improvement of the coloring method for the 3D printing technology, the 3D printing substrate is a transparent substrate, the transparent 3D printing substrate is colored, the influence of the natural color of the 3D printing substrate on the hue of the color is avoided, the color expression is more accurate, and the color can be more expressive even if the 3D printing substrate is colored inside a molded product.

As an improvement of the coloring method of the 3D printing technology, after each layer is printed, coloring is carried out along the edge of the printing layer, and a strip-shaped coloring area is formed.

As an improvement of the coloring method of the 3D printing technology, a non-colored blank area is arranged between the upper color area and the edge of the printing layer, the blank areas of the printing layers are bonded through the non-colored blank areas, the influence on the bonding effect between the 3D printing substrates after coloring is reduced, the blank areas are arranged between the edge of the printing layer and the coloring area, the bonded blank areas of all layers form a transparent surface similar to a protective shell, the bonding between the blank areas is more stable relative to the bonding of the upper color area under the influence of no pigment, a stable and firm outer surface is formed on a printing and molding product, and the texture and the aesthetic feeling of the molding product are improved through the transparent outer surface.

As an improvement of the coloring method for the 3D printing technology, the width of the strip-shaped coloring area is set to change the light transmittance, so that the obtained colors have different brightness according to requirements, and the coloring method is particularly suitable for lighting products such as lamp covers.

As an improvement of the coloring method for the 3D printing technology, the strip-shaped coloring area is an intermittent strip-shaped area, and by arranging the intermittent coloring area, a gap without coloring is formed in the coloring area, and the gap enables the bonding between the printing layer and the next printing layer to be firmer; the gap can also be used as a light-transmitting channel, the ratio of the gap to the coloring area is changed, so that the light transmittance and the brightness of color expression can be controlled, and the size of the gap is not more than 0.5mm in order to ensure that the color expression of a molded product is uniform.

As an improvement of the coloring method for the 3D printing technology, after each layer is printed, coloring is carried out along the edge of the printed layer, at least two strip-shaped coloring areas are formed, the wider strip-shaped coloring areas are arranged into a plurality of strip-shaped coloring areas, so that the strip-shaped coloring areas do not need to be arranged too wide, gaps among the strip-shaped coloring areas contribute to the firmness of bonding among the printed layers of each layer, and the lightness of colors is controlled by changing the ratio of the total width of the gaps among the strip-shaped coloring areas to the total width of the coloring areas.

The coloring method for the 3D printing technology is an improvement of the coloring method for the 3D printing technology, each printed layer is colored and forms a coloring area, the edges of the coloring areas of all layers are connected into a three-dimensional color pattern by controlling the relative position of the edge of the coloring area of each printed layer, so that the three-dimensional pattern similar to the relief effect is formed inside a molded product, and the pattern is printed layer by layer, so that the complex three-dimensional pattern effect can be quickly finished.

As an improvement of the coloring method of the 3D printing technology, the colors are formed into non-intersected color points, and the area of each color point is not more than 1mm_­ ²The color points are not mutually effective, so that gaps which are beneficial to pasting between printing layers and have no coloring exist among the color points, the gaps can be used as light paths, the molded product has the effect of color transparency, and the area of the color points is not more than 1mm_­ ²So that the color expression of the molded product is still uniform in appearance, the brightness of the color is changed by changing the area ratio of the color dots to the printing layer, and the transparency is changed by changing the size of the gaps among the color dots. Wherein, the color points are of regular or irregular pattern, and are arranged regularly or in irregular arrangementIn a disordered arrangement.

The beneficial effects of the invention are as follows: the coloring method for the 3D printing technology is provided, the 3D printing substrate is used for printing the product layer by layer, and the printing layer is colored after each layer is printed. Through coloring each layer of printing layer to printing the layer and being the unit so that each layer of printing layer can obtain required colour accurately, need not frequently change the 3D of different colours and print the substrate, improve the printing efficiency that polychrome 3D printed widely, and simplified the equipment structure that polychrome 3D printed, reduction equipment cost. Because each printing layer is colored, the colored color is not limited on the surface of a 3D printing finished product, and the condition of color loss caused by coloring only on the surface of the finished product is avoided; compared with the method of only coloring the surface of the finished product, after each printing layer is colored, the color displayed by the printed finished product has more expressive force.

Drawings

Fig. 1 is a schematic view of a coloring manner of a printing layer according to the present invention.

FIG. 2 is a schematic diagram of a second coloring method for a printing layer according to the present invention.

FIG. 3 is a third schematic view of the coloring method of the printing layer according to the present invention.

FIG. 4 is a fourth schematic view of the coloring method of the printing layer according to the present invention.

FIG. 5 is a schematic diagram of a coloring method for a printing layer according to the present invention.

FIG. 6 is a schematic diagram of a solid pattern formed in the upper color region of the multi-layer printing layer according to the present invention.

Fig. 7 is a schematic view of a 3D printed lampshade.

Wherein, 1, printing layer, 11, coloring area, 12, white area, 13, color point, 14, three-dimensional color pattern.

Detailed Description

The present invention and its advantageous effects will be described in further detail with reference to specific embodiments, but the present invention is not limited thereto.

Implementation mode one

As shown in fig. 1 to 6, the coloring method of 3D printing technology is to print a product layer by using a 3D printing substrate, and color the printing layer 1 after each layer is printed. The 3D printing substrate is a transparent substrate, and the coloring method comprises the steps of mixing primary colors to obtain required colors, and spraying the required colors on the printing layer 1 in a color spraying mode after each printing layer.

As shown in fig. 1 and 2, it is preferable that coloring is performed along the edge of the printed layer 1 after each printed layer, and a band-shaped coloring area 11 is formed. A blank area 12 which is not colored is arranged between the upper color area 11 and the edge of the printing layer 1.

Preferably, the width of the colored region 11 in a band shape is set to vary the light transmittance.

As shown in fig. 3, the band-shaped colored region 11 is preferably an intermittent band-shaped region.

As shown in fig. 4, it is preferable that coloring is performed along the edge of the printed layer 1 after each printed layer, and not less than two band-shaped colored areas 11 are formed.

As shown in fig. 5, the colors are preferably formed as disjoint color points 13, each color point 13 having an area of no more than 1mm_­ ²。

As shown in fig. 6, it is preferable that the printed layer 1 is colored and a colored region 11 is formed after each layer is printed, and the edges of the colored regions 11 of the respective layers are connected to form a three-dimensional color pattern 14 by controlling the relative positions of the edges of the colored regions 11 of the printed layer 1.

Second embodiment

As shown in fig. 7, when the 3D printing technology is used to print the lampshade, each printed layer colors the preset coloring area 11, and other features are the same as those of the first embodiment, which is not repeated herein. Make the lamp shade have semitransparent color effect, in order to obtain the effect that can penetrate monochromatic or polychrome light through the colour that sets up the lamp shade, as preferred, this lamp shade can also print three-dimensional color pattern 14, has both guaranteed the light color effect of lamp shade, also plays the artistic effect of lamp decoration goods of furniture for display rather than for use.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The coloring method for the 3D printing technology is characterized by comprising the following steps: utilize 3D to print substrate successive layer and print the product, and color this printing layer after printing one deck each.
2. 2. The coloring method for 3D printing technology according to claim 1, wherein: after the required color is obtained by mixing the primary colors, the required color is sprayed on the printing layer by a color spraying mode after each printing layer.
3. 3. The coloring method for 3D printing technology according to claim 1, wherein: the 3D printing substrate is a transparent substrate.
4. 4. The coloring method for 3D printing technology according to claim 3, wherein: and coloring along the edge of the printed layer after each printed layer, and forming a strip-shaped coloring area.
5. 5. The coloring method for 3D printing technology according to claim 4, wherein: and a blank area which is not colored is arranged between the upper color area and the edge of the printing layer.
6. 6. The coloring method for 3D printing technology according to claim 4, wherein: the width of the strip-shaped upper color area is set to change the light transmittance.
7. 7. The coloring method for 3D printing technology according to claim 4, wherein: the strip-shaped coloring area is an intermittent strip-shaped area.
8. 8. The coloring method for 3D printing technology according to claim 3, wherein: coloring along the edge of the printed layer after each layer is printed, and forming at least two strip-shaped coloring areas.
9. 9. The coloring method for 3D printing technology according to claim 3, wherein: and coloring the printing layer after each printing layer and forming a coloring area, and controlling the relative position of the edge of the coloring area of each printing layer to connect the edges of the coloring areas of each layer into a three-dimensional color pattern.
10. 10. The coloring method for 3D printing technology according to claim 3, wherein: the colors being formed as disjoint color points, each color point having an area of no more than 1mm_­ ²。