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Quality Analysis of Micro-Holes Made by Polymer Jetting Additive Manufacturing.

Razvan Udroiu¹

¹Department of Manufacturing Engineering, Transilvania University of Brasov, 29 Eroilor Boulevard, 500036 Brasov, Romania.

|January 11, 2024

Summary

Material jetting additive manufacturing (AM) produces high-accuracy micro-holes. Matte finishes and specific orientations (x and z axes) yield the best results for micro-hole quality in polymer science applications.

Keywords:

3D printing additive manufacturing dimensional accuracy material jetting micro-hole polymers quality analysis

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Area of Science:

Polymer science
Additive Manufacturing (AM)
Material Jetting Technology

Background:

Material jetting AM is increasingly popular for high-accuracy polymer products.
Micro-hole quality is critical for many industrial applications.

Purpose of the Study:

Investigate micro-hole quality produced by material jetting AM.
Evaluate the accuracy of micro-holes in three basic orientations.
Propose a novel methodology using a transparent artifact for micro-hole evaluation.

Main Methods:

Designed a test artifact with horizontal and vertical micro-holes on planar and curved surfaces.
Manufactured samples using PolyJet technology with translucent photopolymer resin.
Analyzed micro-hole features (matte/glossy finish, coarse/medium diameter) via microscopy.
Utilized statistical design of experiments to analyze factors affecting micro-hole diameter deviation.

Main Results:

Microscopy revealed quality differences in micro-hole features.
Matte finishing with micro-holes oriented along the x-axis and z-axis yielded the best results.
Smallest micro-hole diameter achieved was 0.5 mm; larger diameters recommended for industrial post-processing.
Confirmatory experiment on a wing sample confirmed result repeatability.

Conclusions:

Material jetting AM can produce high-quality micro-holes.
Matte finish and specific micro-hole orientation significantly impact accuracy.
Optimized parameters are crucial for achieving desired micro-hole dimensions in industrial AM applications.