Unsupported 3D printing system and method

A 3D printing, unsupported technology, applied in the field of 3D printing technology, can solve the problems of unsatisfactory printing of precision objects, rough surface quality of parts, high equipment cost, etc., and achieve the effect of saving labor costs, high printing accuracy and fast printing speed

Active Publication Date: 2018-10-19
零犀智造(天津)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the SLS laser sintering 3D printing system has low molding accuracy and rough surface qual

Method used

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  • Unsupported 3D printing system and method
  • Unsupported 3D printing system and method
  • Unsupported 3D printing system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] An unsupported 3D printing method: the photosensitive resin used for printing is a non-fluid paste at normal temperature, and when heated to 35-120°C, it melts into a fluid liquid state; including the following steps:

[0064] S1: Turn on the heating device outside the storage tank 31, preheat the photosensitive resin in the storage tank 31, and keep the temperature of the photosensitive resin in the storage tank 31 between 35-120°C;

[0065] S2: Form a three-dimensional model of the object to be printed, and divide the built three-dimensional model into n layers, each layer has the same height, which is regarded as a unit height, and transmit the cross-sectional information to the projection device;

[0066] S3: The driving device of the printing platform 6 drives the printing platform 6 in the trough 8 to descend to a unit height, and the driving device of the scraper 4 drives the scraper 4 to perform a reciprocating motion to spread the liquid photosensitive resin in ...

Embodiment 2

[0073] An unsupported 3D printing method: characterized in that the photosensitive resin is a fluid liquid at normal temperature, and solidifies into a non-fluid paste when the temperature is lowered to 0 to -70°C; comprising the following steps:

[0074] S1: Form a three-dimensional model of the object to be printed, and divide the built three-dimensional model into n layers, each layer has the same height, which is regarded as a unit height, and transmit the cross-sectional information to the projection device;

[0075] S2: The driving device of the printing platform 6 drives the printing platform 6 in the trough 8 to drop to a unit height, and the driving device of the scraper 4 drives the scraper 4 to reciprocate, and evenly spreads the liquid photosensitive resin in the storage tank 31 on the printing platform 6 The thickness of the smear is the unit height; at the same time, the temperature control device outside the trough 8 is activated to cool the trough 8, and the liq...

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PUM

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Abstract

An unsupported 3D printing system is characterized in that photosensitive resin can be subjected to reversible conversion between liquid and a paste; a projection device adopts UV projection as a light path programming mechanism, the projection mode of the projection device is face forming, and the projection device can move transversely or longitudinally under driving of a projection driving device; a printing platform is arranged in a material groove; and a temperature control device is arranged outside the material groove, a hot medium or a cold medium circulates in the temperature controldevice and the temperature control device can heat or cool the material groove. The photosensitive resin capable of being subjected to reversible conversion between the liquid and the paste is adopted, along with superposition of printing layers, the photosensitive resin in the paste state can also be accumulated layer by layer to form a support to support a printed solid material, thus the process of manual additional arrangement of supporting columns in the modeling process and the process of manual supporting removing after printing is completed are omitted, the printing efficiency is improved, and the labor cost is reduced.

Description

technical field [0001] The invention relates to a 3D printing technology, in particular to an unsupported 3D printing system and a printing method. Background technique [0002] 3D printing technology, that is, a kind of rapid prototyping technology, is a technology based on digital model files, using photosensitive materials such as photosensitive resin, and constructing objects by layer-by-layer printing. The current industrial 3D printing technology mainly adopts the following three methods as projection methods: SLA light-curing 3D printing technology, DLP light-curing 3D printing technology, and SLS laser sintering 3D printing technology. [0003] SLA light-curing 3D printing technology adopts laser 3D printing technology, which is the most popular technology in the market. This technology uses galvanometer deflection laser to achieve point displacement to complete the scanning of each printing layer. SLA light-curing 3D printing technology: the forming size is large ...

Claims

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Application Information

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IPC IPC(8): B29C64/129B29C64/214B29C64/245B29C64/295B33Y30/00
CPCB29C64/129B29C64/214B29C64/245B29C64/295B33Y30/00
Inventor 徐立峥姚治成朱晓群武辰之
Owner 零犀智造(天津)科技有限公司
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