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Transverse-netlike double-layer structure 4D printing method based on temperature response

A double-layer structure and temperature-responsive technology, applied in 3D object support structure, additive manufacturing, processing data acquisition/processing, etc., can solve the problems of slow molding speed, complexity, and extremely high requirements for workpiece processing equipment, and achieve fast molding speed , low requirements, and achieve the effect of integrated manufacturing

Inactive Publication Date: 2019-04-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 4D deformation under the current system has many shortcomings. When the forming speed is fast, the processing equipment of the workpiece is extremely demanding, and complex workpiece planning is required.
And when the requirements for processing equipment are low, the molding speed is too slow

Method used

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  • Transverse-netlike double-layer structure 4D printing method based on temperature response
  • Transverse-netlike double-layer structure 4D printing method based on temperature response
  • Transverse-netlike double-layer structure 4D printing method based on temperature response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) First, use 3D modeling software to establish a 3D model of a double-layer workpiece that uses polymers for 4D printing. The size of the product workpiece is 10*40*1.5mm 3 , the deformation of the workpiece is intended to have a transverse strain of 0.36 and a longitudinal strain of 0.07.

[0062] (2) Select polylactic acid as the shape memory material for 3D printing, use slicing software to slice the 3D model layer by layer, and set the printing layer height and printing line width according to the desired deformation. The selected line width is 0.4mm, the selected layer height is 50μm. The upper layer of the workpiece uses 150 single-layer horizontal grain patterns with a printing angle of 90°, and the lower layer uses 150 single-layer cross-grain patterns with a cross angle of 90° and printing angles of 45° and 135° respectively, such as Figure 8 As shown, the thickness ratio of the two layers is 1:1, and the results of the layered slice processing and the iden...

Embodiment 2

[0066] (1) First, use 3D modeling software to establish a 3D model of a double-layer workpiece that uses polymers for 4D printing. The size of the product workpiece is 10*40*1.5mm 3 , the deformation of the workpiece is intended to have a transverse strain of 0.15 and a longitudinal strain of 0.12.

[0067] (2) Select polylactic acid as the shape memory material for 3D printing, use slicing software to slice the 3D model layer by layer, and set the printing layer height and printing line width according to the desired deformation. The selected line width is 0.4mm, the selected layer height is 50μm. The upper layer of the workpiece uses 150 single-layer horizontal grain patterns with a printing angle of 45°, and the lower layer uses 150 single-layer cross-grain patterns with a cross angle of 90° and printing angles of 45° and 135° respectively, such as Figure 10 As shown, the thickness ratio of the two layers is 1:1, and the layered slice processing results and identified par...

Embodiment 3

[0071] (1) First, use 3D modeling software to establish a 3D model of a double-layer workpiece that uses polymers for 4D printing. The size of the product workpiece is 10*40*1.5mm 3 , the deformation of the workpiece is intended to have a transverse strain of -0.20 and a longitudinal strain of -0.12.

[0072] (2) Select polylactic acid as the shape memory material for 3D printing, use slicing software to slice the 3D model layer by layer, and set the printing layer height and printing line width according to the desired deformation. The selected line width is 0.4mm, the selected layer height is 50μm. The upper layer of the workpiece uses 150 single-layer horizontal grain patterns with a printing angle of 0°, and the lower layer uses 150 single-layer cross-grain patterns with a cross angle of 90° and printing angles of 45° and 135°, respectively, such as Figure 12 , the thickness ratio of the two layers is 1:1, and the results of the layered slice processing and the identifie...

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Abstract

The invention discloses a transverse-netlike double-layer structure 4D printing method based on temperature response. The method comprises the steps that shape memory polymer materials are selected toperform repeating cascading printing from bottom to top with a double-layer structure as a unit, wherein the double-layer structure is formed by performing cascading printing and arranging on two groups of different fill pattern layers up and down, all single layers in the groups of fill pattern layers are printed to be the same fill patterns, fill pattern layers above and below are transverse grain patterns and netlike grain patterns correspondingly, the transverse grain patterns and the netlike grain patterns are textured patterns formed by arranging one group of straight line arrays and two groups of straight line arrays in a crossed mode, and the straight line arrays are composed of a plurality of straight lines arranged in parallel; and rough products are made to deform through precise temperature heating, and 4D deformation is completed. By means of the 4D printing method, the problems that currently, temperature-driven 4D printing material preparation is difficult, and the degree of response to low-power deformation is small are solved, the fused deposition 4D printing method that special wires do not need to be manufactured through design parameter programming is achieved,and limitations of the tedious process of material preparation of the 4D printing technology are broken through.

Description

technical field [0001] The present invention relates to a 4D printing method in the field of 4D printing of smart materials, in particular to a 4D printing method based on a temperature-responsive horizontal-mesh double-layer structure, which realizes the fusion of programmable design parameters without manufacturing special wires Deposition 4D printing method. Background technique [0002] 4D printing, as a material processing technology developed based on intelligent sensing materials, provides a new idea to break through the limitations of traditional deformation materials. For bending deformation, since the non-uniform shrinkage of the workpiece volume along the thickness direction will cause the bending behavior of multi-layer materials, 4D printing usually designs multi-layer structures that have different responses to different structures. The conventional 4D printing deformation process generally has two realization forms: 1. Different materials are used to form two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/379B29C64/393B29C64/30B33Y10/00B33Y30/00B33Y50/02B33Y80/00
CPCB29C64/118B29C64/30B29C64/379B29C64/393B33Y10/00B33Y30/00B33Y50/02B33Y80/00
Inventor 曾思远高一聪冯毅雄郑浩
Owner ZHEJIANG UNIV
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