阅读说明：本技术 一种熔融沉积法混料彩色3d打印方法 (Fused deposition method mixed material color 3D printing method ) 是由 李景贺 于 2018-08-01 设计创作，主要内容包括：一种熔融沉积法混料彩色3D打印方法,同时兼顾零件打印色彩逼真及结构强度。采用的技术方案是,借助双挤出头,一个负责打印模型本体,使用的是5种不同颜色的PLA塑料线混熔作为原料；另一个负责打印模型悬空部位的支撑结构,使用的是水溶性PVA塑料,整个模型打印完毕之后支架部分水解消失,从而实现零件的熔融沉积法混料彩色3D打印。本发明的优点是成型后零件不易变形、不出现裂纹,且热应力易于控制。(A3D printing method for mixing materials by a fused deposition method is provided, and meanwhile, the vivid color and structural strength of part printing are considered. The adopted technical scheme is that one of the extrusion heads is responsible for printing the model body by means of double extrusion heads, and 5 PLA plastic wires with different colors are used as raw materials in a mixed melting mode; the other supporting structure is responsible for printing the suspended part of the model, water-soluble PVA plastic is used, and the support part is hydrolyzed and disappears after the whole model is printed, so that the fused deposition method mixed material color 3D printing of parts is realized. The invention has the advantages that the formed part is not easy to deform and crack, and the thermal stress is easy to control.)

1. A fused deposition method mixed material color 3D printing method is characterized in that: the method is realized by the following steps:

step 1, designing a part CAD three-dimensional model by adopting three-dimensional modeling software, printing a model body by adopting a double-extrusion-head 3D printer and one extrusion head, and using 5 PLA plastic wires with different colors as raw materials in a mixed melting mode; the extrusion head is responsible for printing a supporting structure of the suspended part of the model, and water-soluble PVA plastic is used;

step 2, mixing and melting PLA plastics with three primary colors and black and white 5 colors, then extruding, and randomly changing the colors of the extruded plastics by controlling the feeding proportion of raw materials with various colors to print a color model;

step 3, processing the part CAD three-dimensional model obtained in the step 1 by slicing software, storing the part CAD three-dimensional model as an STL file, and transmitting data information of the STL file to a fused deposition method 3D printer;

step 4, heating the common plastic to 200 ℃, then spraying the common plastic onto a platform in a printer, and finally forming the 3D object layer by layer;

and 5, removing the plastic of the support structure at any suspended part by hydrolysis washing, and polishing.

Technical Field

The invention relates to the technical field of fused deposition method forming in 3D printing, in particular to a fused deposition method mixing material color 3D printing method.

Background

With the continuous development of 3D printing technology, 3D printing technology has been widely applied in different fields, and although 3D printing is good, high-precision SLS (laser melting and stacking) and SLA (laser curing) laser printing costs are high, and only one color is produced; although the 3D printing mode of powder, color colorant and cementing agent can print vivid full color, the 3D printing mode has the fatal weakness that the structural strength is not high, and as for an FDM (fused deposition) mode with low cost, namely a printer with an extrusion head continuously smearing and extruding molten plastics, the output model has only one color and is very monotonous. However, due to the different complexity of the parts, for the complicated parts, especially for the easily deformable edge regions in the parts, if the control of parameters such as laser power is not good, the deformation, cracks and the like are likely to occur. At present, the substantial problem of low working efficiency is not solved, and the application field of color 3D printing is greatly limited.

Disclosure of Invention

In order to solve the technical problems that the forming efficiency is low in the field of color 3D printing, formed parts are easy to deform and crack, and the thermal stress is difficult to control, the invention designs a material mixing color 3D printing method by a fused deposition method.

The invention adopts the technical scheme that 5 colors of PLA plastics (three primary colors and black and white) are simultaneously mixed and melted and then extruded, and the colors of the extruded plastics can be randomly changed by controlling the feeding proportion of raw materials with various colors, so that a color model can be printed.

The invention achieves the purpose by adopting the following steps:

a fused deposition method mixing material color 3D printing method is realized by the following steps:

step 1, designing a part CAD three-dimensional model by adopting three-dimensional modeling software, printing a model body by adopting a double-extrusion-head 3D printer and one extrusion head, and using 5 PLA plastic wires with different colors as raw materials in a mixed melting mode; the extrusion head is responsible for printing a supporting structure of the suspended part of the model, and water-soluble PVA plastic is used;

step 2, mixing and melting PLA plastics with three primary colors and black and white 5 colors, then extruding, and randomly changing the colors of the extruded plastics by controlling the feeding proportion of raw materials with various colors to print a color model;

step 3, processing the part CAD three-dimensional model obtained in the step 1 by slicing software, storing the part CAD three-dimensional model as an STL file, and transmitting data information of the STL file to a fused deposition method 3D printer;

step 4, heating the common plastic to 200 ℃, then spraying the common plastic onto a platform in a printer, and finally forming the 3D object layer by layer;

and 5, removing the plastic of the support structure at any suspended part by hydrolysis washing, and polishing.

The invention has the advantages that the formed part is not easy to deform and crack, and the thermal stress is easy to control.

The present invention will be described in detail with reference to examples.

Detailed Description

A fused deposition method mixing material color 3D printing method is realized by the following steps:

step 1, designing a part CAD three-dimensional model by adopting three-dimensional modeling software, printing a model body by adopting a double-extrusion-head 3D printer and one extrusion head, and using 5 PLA plastic wires with different colors as raw materials in a mixed melting mode; the extrusion head is responsible for printing a supporting structure of the suspended part of the model, and water-soluble PVA plastic is used;

step 2, mixing and melting PLA plastics with three primary colors and black and white 5 colors, then extruding, and randomly changing the colors of the extruded plastics by controlling the feeding proportion of raw materials with various colors to print a color model;

step 3, processing the part CAD three-dimensional model obtained in the step 1 by slicing software, storing the part CAD three-dimensional model as an STL file, and transmitting data information of the STL file to a fused deposition method 3D printer;

step 4, heating the common plastic to 200 ℃, then spraying the common plastic onto a platform in a printer, and finally forming the 3D object layer by layer;

and 5, removing the plastic of the support structure at any suspended part by hydrolysis washing, and polishing.