A method to improve the efficiency of dlp light-curing additive manufacturing

An additive manufacturing and light-curing technology, applied in the field of additive manufacturing, can solve the problems of unavailability of materials and high cost of oxygen ion exchange membrane, and achieve the effect of reducing the total printing time, optimizing the printing method, and reducing over-curing

Active Publication Date: 2020-06-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an oxygen ion exchange membrane is very expensive, and such materials cannot be purchased domestically.

Method used

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  • A method to improve the efficiency of dlp light-curing additive manufacturing
  • A method to improve the efficiency of dlp light-curing additive manufacturing
  • A method to improve the efficiency of dlp light-curing additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] This example uses figure 1 The three-dimensional DLP printing platform shown is used for printing. By adjusting the cooperation between the system 3 and the imaging lens 6, the optical path 12 can form an image with a required resolution on the imaging mobile platform 8 after passing through the imaging lens 6, but it is not limited to this platform. Any drop-type DLP printing device can implement the method involved in the present invention, and the method is not limited by the device.

[0049] When this embodiment is implemented, the z-axis mobile platform 2 and the DMD chip 5 need to be connected with a computer for synchronous control.

[0050] This example is based on the understanding and analysis of the forming properties of the material, and it is necessary to explore the forming properties of the material, using figure 1 The DLP printing device shown prints in the traditional way figure 2 The model shown.

[0051] figure 2 The model involved in is divided i...

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Abstract

The invention discloses a method for improving DLP (digital light procession) photocurable additive manufacture efficiency, and relates to the additive manufacture technology field. The method for improving the DLP photocurable additive manufacture efficiency improves: 1) structuring a measurement standard component, selecting a material for printing a measurement standard component model, confirming forming characteristics of the selected material, and obtaining forming property parameters of the selected material; 2) confirming a relationship between a parameter B related to forming properties of the selected material and time tT needed by the material for absorbing energy to reach a critical curing state; 3) using an ultraviolet absorbent for adjusting the forming properties of the selected material, and obtaining quantitative influences from concentrations cd of the ultraviolet absorbent to the forming properties; 4) repeating the step 2) and the step 3), obtaining B values and tTvalues under the different concentrations cd of the ultraviolet absorbent, and then obtaining a relational expression of the parameter B, the time tT and the concentrations cd of the ultraviolet absorbent; and 5) obtaining the related parameter B and the time tT through the relational expression obtained in the step 4), and printing the model to be printed.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for improving the efficiency of DLP light-curing additive manufacturing. Background technique [0002] The full name of DLP (Digital light processing) is "Digital Light Processing" technology. Based on the imaging principle of DMD chip reflecting ultraviolet light, using photosensitive resin as raw material, additive manufacturing is carried out through the following steps: [0003] 1. CAD technology to construct digital model; [0004] 2. Slicing the model that requires layer height through software; [0005] 3. The ultraviolet light of a specific wavelength projects the pattern input by the computer through the reflection of the DMD chip, and irradiates the photosensitive resin layer; [0006] 4. The time determined by the layer thickness is irradiated to make the photosensitive resin change from liquid to solid; [0007] 5. The printing ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B29C64/129B29C64/393B33Y10/00B33Y50/02
CPCB29C64/129B29C64/393B33Y10/00B33Y50/02
Inventor尹俊李洋
OwnerZHEJIANG UNIV