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3D printing method and device for one-way large-dimension products

A technology of 3D printing and printing devices, which is applied in the direction of manufacturing auxiliary devices, processing drive devices, 3D object support structures, etc., can solve the problems of changing material structures, exceeding requirements, and limiting, etc., to achieve guaranteed performance and dimensional accuracy, and flexible temperature control , the effect of an effective solution

Active Publication Date: 2017-04-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, no matter what kind of 3D printer, it will be limited by the size of the frame, and the printed parts have certain size requirements. At present, even large-scale industrial-grade 3D printers, such as Stratasys’ FDM900, The maximum length of its printed parts is only 900mm
Therefore, it is often the case that the requirements for printed parts exceed the size limit of the 3D printer frame
[0004] Chinese invention patent (application number: 201410422928.9) discloses a 3D printing manufacturing method for large-size parts. As a result, the performance and dimensional accuracy of the parts are affected due to cutting and splicing. In addition, the complexity of the pre-printing and post-processing processes is also virtually increased.
[0005] At the same time, the performance of printed products is not only related to the composition of raw materials, but also related to process factors such as printing path. Recently, a paper was published in an international journal [Ying-Guo ZHOU, Bei SU, Lih-ShengTURNG. Depositing-Induced Effects of Isotactic Polypropylene and PolycarbonateComposites During Fused Deposition Modeling.Rapid Prototyping Journal,2017,23(5),Doi:10.1108 / RPJ-12-2015-0189.], this article describes that in 3D printing, along the printing direction in some specific Under certain process conditions, the material will undergo structural changes due to the printing-induced effect, resulting in a large difference in the performance of the product
Therefore, under certain conditions, 3D printing is not only a simple accumulation of materials, but also changes the material structure due to the force in a certain direction during the printing process. The method of split printing and combination cannot make full use of the printing induction effect , it is easy to form a weak link in mechanical properties at the division

Method used

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  • 3D printing method and device for one-way large-dimension products

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Embodiment 1

[0032] In order to be able to break through the size limit of the existing 3D printer in a certain direction, in this embodiment, the X direction is taken as an example, and the use of three movable printing boards is used as a representative, and the pretreatment method and printing method of the corresponding printed parts The device and printing process are described as follows:

[0033] 1) Pretreatment of printed parts

[0034] When it is necessary to print a unidirectional large-size part, in addition to the pre-processing method similar to the conventional printed part, the following two aspects need to be dealt with. First, assuming that the length of the active printing plate in the X direction is 500mm, the printed part When the X direction of the piece is 1001 ~ 1500mm, it is determined that the number of blocks required is 3 (1500 / 500 = 3), and there are plug-in parts at the end of the movable printing board, and there are temperature control components inside the m...

Embodiment 2

[0044] The printing process in Example 1 realizes block printing between each layer. In this way, the number of movements of the printing plate is only 2N times (N layers). In order to be closer to the printing path of the existing 3D printing, in the implementation On the basis of Example 1, this embodiment still takes the large-size product in the X direction as an example, and uses 3 movable printing plates as a representative, and the pre-processing method, printing device and printing process of the corresponding printed product For illustration. but,

[0045] 1) Pretreatment of printed parts

[0046] When it is necessary to print a unidirectional large-size part, in addition to the pre-processing method similar to the conventional printed part, the following two aspects need to be dealt with. First, assuming that the length of the active printing plate in the X direction is 500mm, the printed part When the X direction of the piece is 1001-1500mm, the number of blocks r...

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Abstract

The invention discloses a 3D printing method and device for one-way large-dimension products. Special treatment is conducted on codes which are formed after a model of the products to be printed is subjected to segmentation processing, the situation that a printing head and a printing base readjust the printing position automatically in the printing process can be achieved, and accordingly the printing range is ensured. The printing base is of a combined structure, and movable printing plates can be freely connected and spliced so as to form the integrated printing base meeting the one-way dimensional requirement finally. The printing base can cooperate with the printing head in the printing process to realize automatic shifting of the movable printing plates. By means of the 3D printing method and device for the one-way large-dimension products, the problem that the one-way printing dimension of existing 3D printing equipment is limited is solved, automatic integrated 3D printing of the one-way large-dimension products is achieved, the performance and dimension precision of the large-scale products are ensured accordingly, and a quick and effective solution is provided for manufacturing of one-way large-dimension parts in various fields.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing equipment, and in particular relates to a 3D printing method and a printing device for a unidirectional large-size workpiece. Background technique [0002] 3D printing is additive manufacturing, which mainly includes selective laser sintering (SLS), stereolithography (SLA), layered solid manufacturing (LOM), fused deposition technology (FDM), etc. These technologies mostly use computer software to process the CAD 3D model of the part to be printed in layers along one or several directions, and then obtain the processing information of the cross-sectional profile of each layer, accumulate layers in the 3D printer, and use different methods to use it. The accumulated material is solidified to obtain the required parts quickly and accurately. In this process, 3D printing devices are necessary equipment, and these devices are quite different due to different printing methods and printi...

Claims

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Application Information

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IPC IPC(8): B29C64/118B29C64/20B29C64/227B29C64/393B33Y10/00B33Y30/00B33Y50/02
CPCB33Y10/00B33Y30/00B33Y50/02
Inventor 周应国周晶晶梅以洵
Owner JIANGSU UNIV OF SCI & TECH
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