On-line force monitoring of platform ascending rapid prototyping system

Huang, You–Min; Jiang, Cho‐Pei

doi:10.1016/j.jmatprotec.2004.05.015

Cited by 66 publications

(37 citation statements)

References 4 publications

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“…Most of them are, however, still at the state of trial and error, primarily due to lack of research on fundamental characterization of AM processes, though some study focusing on deformation behavior involving heat transfer has been carried out [3,4]. Investigations with focus on mechanics-based characterization (for example, constitutive law, linear/non-linear structural behavior) are still missing.…”

Section: Introductionmentioning

confidence: 99%

“…Another possible and more common approach to address this problem, as already mentioned earlier, is to apply a suitable coating medium (e.g. Silicone film, Teflon film) to the bottom surface of the resin vat so that its bonding strength with the cured layer becomes relatively less which leads to alleviating the separation process [3,14]. Denken Co.…”

Section: Introductionmentioning

confidence: 99%

“…In a recent work, the adhesive force between the coated silicone film and the cured part has been investigated and a direct mask curing system, that uses silicone film for easy separation of the cured part, has been developed [3]. The exposed liquid resin becomes solid and a vacuum state is created at the interface between the silicone film and solidified resin.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the Computer Aided Design 6 degree of curing and the cured area are two important factors to determine the pulling force. A measurement system has been designed to analyze this pulling force [3].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Separation force analysis and prediction based on cohesive element model for constrained-surface Stereolithography processes

Liravi

Das

Zhou

2015

Computer-Aided Design

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Separation force analysis and prediction based on cohesive element model for constrained-surface Stereolithography processes

Liravi

Das

Zhou

2015

Computer-Aided Design

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“…One alternative application has been proposed (Hayashi et al, 2000;Nishino et al, 2002;Huang and Jiang, 2005), using a liquid crystal displayer (LCD) as a mask generator, to direct the forming prototype. This method decreases forming time but increases inaccuracy because diffraction occurs when light goes through the liquid crystal and the resolution of the LCD results in a pixel-like profile.…”

Section: Introductionmentioning

confidence: 99%

Dynamic finite element analysis of photopolymerization in stereolithography

Jiang

Huang

2006

Rapid Prototyping Journal

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Purpose -This paper aims to introduce the principle of the mask exposure and scanning stereolithography (MESS) and to develop a simulation code to analyze the MESS process. Design/methodology/approach -Photopolymerization is a key reaction in stereolithography. It brings about molecular linkage and releases exothermic temperature. The shrinkage effect is the major cause of prototype deformation, and the shrinkage resulting from scanning and mask exposing is different. It is important to analyze the inaccuracy of each curing layer after the mask exposing in order to optimize the scanning parameters. A simulation code, based on dynamic finite element method, to analyze the shrinkage effect in accordance with scanning path and mask exposure pattern. A benchmark model has been proposed to validate the implementation of the developed code. Findings -The simulation results show that the developed code can analyze the deformation in laser scanning, masking exposing and the MESS process. In benchmark model study, the sharp corner shrinks faster than rounded edge in mask pattern curing. Although the profile scanning can maintain the high accuracy in the MESS process, the residual stress is easily discovered inside of the sharp corner. Originality/value -The developed simulation code can be applied for optimizing scan path and exposing time due to the analysis process in accordance with the drawing path and fabrication parameters.

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Polymeric Materials for Additive Manufacturing

Weyhrich

Scott

Williams

et al. 2022

Macromolecular Engineering

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Additive manufacturing (AM), also known as 3D printing, is a promising technology to produce complex shapes with little waste material in a distributed fashion. AM can be implemented with various materials, but metal and polymer are dominant feedstocks. During the deposition process for polymeric AM, the polymer may encounter repetitive softening or melting, applied shear flow including multiple constrictions, cooling and solidification, solvent evaporation, polymerization and crosslinking, or coalescence across interfaces. This leads to the need to invoke polymer science principles to rationally predict the response of the polymeric feedstock to the shear fields, thermal gradients, and reaction fronts that they will encounter in the complex 3D printing process. Elucidating the fate of the macromolecules as they experience the 3D printing process provides a foundation to design new materials that are formulated to bias the formation of robust structures and interfaces. As such, polymers in AM offer a unique opportunity to apply polymer science principles to address shortcomings, offer potential solutions, and advance the technology. This article provides a focused discussion of how polymer science principles drive the growth of three common polymeric AM techniques, fused filament fabrication, direct‐ink write, and vat polymerization.

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On-line force monitoring of platform ascending rapid prototyping system

Cited by 66 publications

References 4 publications

Separation force analysis and prediction based on cohesive element model for constrained-surface Stereolithography processes

Separation force analysis and prediction based on cohesive element model for constrained-surface Stereolithography processes

Dynamic finite element analysis of photopolymerization in stereolithography

Polymeric Materials for Additive Manufacturing

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