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Method for improving laser scanning image light-curing quick-molding efficiency

A technology of laser scanning imaging and photocuring molding, applied in the field of imaging systems, can solve the problems of low efficiency and high cost, and achieve the effects of high spectroscopic efficiency, improved efficiency and improved scanning efficiency

Inactive Publication Date: 2014-09-10
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above deficiencies, solve the problems of high cost and low efficiency in laser scanning photocuring technology, and aim to provide an economical, flexible and high-efficiency laser scanning method

Method used

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  • Method for improving laser scanning image light-curing quick-molding efficiency
  • Method for improving laser scanning image light-curing quick-molding efficiency
  • Method for improving laser scanning image light-curing quick-molding efficiency

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: Collimated laser light source

[0030] Laser light source: When the laser scans the photosensitive resin, the photosensitizer in the photosensitive resin absorbs light energy of a certain wavelength, decomposes into free radicals or interacts with other molecules to generate free radicals, and then triggers a chain growth reaction, and the resin changes from liquid to solid state. Therefore, the choice of light source mainly depends on the absorption of photons of different frequencies by the photosensitizer. Most photosensitizers have a large light absorption coefficient in the ultraviolet region, so the photosensitive resin is easy to cure in the ultraviolet region, so the present invention preferably adopts a laser light source with a wavelength of 405nm. As the working medium in laser processing, the quality and stability of the laser beam will directly affect the operation of the scanning system. Therefore, it is required that the laser can operate n...

Embodiment 2

[0032] Embodiment 2: Optical fiber splitter

[0033] The optical fiber splitter can divide one optical signal into multiple outputs. The optical fiber splitter is preferably 405nm ultra-high transmittance ultraviolet energy transmission fiber, and the transmission efficiency per meter can reach 99%. The structure of the optical fiber splitter is as follows: image 3 shown.

[0034] The optical fiber splitter includes an input optical fiber and N output optical fibers, wherein the output optical fiber bundle includes a central output optical fiber arranged in the center and a plurality of peripheral output optical fibers arranged in the periphery. One branch of each optical fiber bundle contains N optical fibers before passing through the connection point, and is divided into N branches at the connection point, and each branch contains a single optical fiber.

[0035] Each output fiber is provided with N protective covers to prevent dust and other dirt, and the material of the...

Embodiment 3

[0037] Embodiment 3: scanning vibrating mirror: coated with high reflection film.

[0038] The galvanometer motor drives the galvanometer to scan the workpiece. The motor is required to have a large load inertia to ensure that the galvanometer can be loaded. The motor and the drive board receive the control signal from the computer to drive the galvanometer to rotate and complete the deflection of the laser beam. The scanning motor base is used to fix the scanning galvanometer motor to prevent the vibration during operation from affecting the processing, and the base should have a good heat dissipation effect.

[0039] The galvanometer scanning system consists of X and Y two-axis scanning galvanometers, focusing lenses and computer control systems. The scanning galvanometer uses X and Y two galvanometer scanning heads driven by high-speed reciprocating servo motors. Through the servos to the X and Y axes, the system sends command signals, and the X and Y servo motors can drive...

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Abstract

The invention relates to a method for improving the laser scanning image light-curing quick-molding efficiency, and in particular relates to an imaging system capable of enabling liquid-state light-sensitive cured resin to be efficiently and quickly cured based on a multi-light-beam laser scanning technology. According to a specific implementation mode, light emitted by a laser light source (3) passes through a collimating lens (4), collimated laser light beams enter an optical fiber beam splitter (5), a beam of laser is split into 1*N light beam matrixes, the laser beams are reflected by scanning galvanometers (7 and 8) and are focused on a light-cured resin surface (10) by virtue of a field lens (9), a workpiece graph layer is efficiently scanned, and N workpieces can be finally, simultaneously and quickly molded. Therefore, the scanning efficiency is improved by N times correspondingly.

Description

technical field [0001] The invention relates to a method for improving the efficiency of laser scanning imaging and photocuring rapid prototyping, in particular to an imaging system based on multi-beam laser scanning technology to enable liquid photosensitive curable resin to be efficiently and rapidly cured and formed. Background technique [0002] 3D printing is a new type of rapid prototyping manufacturing technology, which manufactures products through the principle of multi-layer superposition growth. It can overcome the special structural obstacles that cannot be realized by traditional machining, and can realize the simplified production of arbitrary complex structural parts. The existing 3D printing technology is divided into hot-melt plastic basic technology FDM, laser sintering molding technology, photo-curing liquid resin selective area curing molding technology. [0003] The existing photocuring technology is classified into: laser imaging imaging ultraviolet sp...

Claims

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Application Information

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IPC IPC(8): B29C67/00
Inventor 周斌孙小玲解维浩李哲杨雷周燕盖颖颖禹定峰
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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