Study on non-isothermal hot-embossing of polymer micro-prism array with efficiency and accuracy

Hu, Manfeng; Xie, Jianhe; Li, Wenzhe; Lu, Kuo Chang

doi:10.1016/j.jmatprotec.2018.11.041

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…Grinding experiments of Ti-6Al-4V microgrooves were conducted on a conventional grinding machine using a trued diamond wheel with a micro-tip. Figure 3(b) demonstrates a microgroove grinding experiment with the trued diamond wheel [37,38]. A trued wheel with a micro-tip of θ v rotated at a rotational speed N and moved along the designated microgrooves at a feed rate v f , a width of cut w g and a depth of cut a p with an accumulative depth of cut Σa p .…”

Section: Machining Methods Of Ti-6al-4v Microstructuresmentioning

confidence: 99%

Response of preosteoblasts on micromachined Ti-6Al-4V surface to microstructure dimension

Chen,

Yang,

Xie

et al. 2023

Biomed. Mater.

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The cell incubation depends on the cultured surface, but various machining methods produce different surface topographies, but it has not been clear how it is related to the topographic feature until now. Hence, the machined Ti-6Al-4V surface is characterized for preosteoblasts incubation via different mechanical fabrication. The relationship between surface topography created by various machining methods and cell incubation behaviour was explored. The objective is to control the surface preosteoblasts growth in machining of biological titanium alloy. According to the cell growth kinetic, the cell incubation behaviour was first proposed and modelled in relation to microstructural dimension and culture duration. Then, the topological cultured microstructure surface was fabricated via mechanical fabrication. Finally, the cell initial adhesion and incubation behaviour on microstructured surface was investigated. It is shown that the surface undulation on machined microstructure is conducive to controlling the direction and distribution of cell incubation from cell growth kinetic model. The cell culture can be controlled on the peak with a small undulation, while it is concentred on the sidewall with a high aspect ratio. Increasing the aspect ratio extends cell growth, while low aspect ratio promotes initial cell adhesion and growth rate. Within the optimal cultured duration, the microstructured surface is more favourable for cell survival, and the cell growth keep positive beyond critical aspect ratio. As a result, the cell adhesion ability is topologically controlled to 5.4 times higher and the growth rate can be improved by 101.7% on milled microgrooved surface. It may be applied to the rapid production of biomedical Ti-6Al-4V implant.

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Section: Machining Methods Of Ti-6al-4v Microstructuresmentioning

confidence: 99%

Response of preosteoblasts on micromachined Ti-6Al-4V surface to microstructure dimension

Chen,

Yang,

Xie

et al. 2023

Biomed. Mater.

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“…The pressure force for embossing which is designed depends on the thickness of the copper film and substrate. There, the copper film is cut to form a positive bond to locally melted plastic close to the surface of the blank [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ].…”

Section: Single-shot Injection Moldingmentioning

confidence: 99%

3D-MID Technology for Surface Modification of Polymer-Based Composites: A Comprehensive Review

et al. 2020

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The three-dimensional molded interconnected device (3D-MID) has received considerable attention because of the growing demand for greater functionality and miniaturization of electronic parts. Polymer based composite are the primary choice to be used as substrate. These materials enable flexibility in production from macro to micro-MID products, high fracture toughness when subjected to mechanical loading, and they are lightweight. This survey proposes a detailed review of different types of 3D-MID modules, also presents the requirement criteria for manufacture a polymer substrate and the main surface modification techniques used to enhance the polymer substrate. The findings presented here allow to fundamentally understand the concept of 3D-MID, which can be used to manufacture a novel polymer composite substrate.

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“…Hot embossing exhibited high accuracy and high efficiency in the manufacturing process of polymeric materials. Hu et al [10] developed a non-isothermal polymer hot embossing process to study micro-prisms and presented an experimental temperature field for hot embossing tools and polymer specimens. With the optimised parameters, they obtained a hot-embossed surface roughness of 10-30 nm and a relevant correlation between the experimental data and analytical micro-formations.…”

Section: Introductionmentioning

confidence: 99%

Influence of elastic-viscoplastic behaviour on the filling efficiency of amorphous thermoplastic polymer during the micro hot embossing process

Rabhi

Cheng

Barrière

et al. 2020

Journal of Manufacturing Processes

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An unsolved issue in simulating the hot embossing of polymers is modelling the unfilled structured mould. This is because the constitutive law of such polymers has not been adequately determined, especially at the microscale or smaller. The present study investigated the influence of the elastic-viscoplastic behaviour on the filling efficiency of an amorphous polymer during the micro hot embossing process. Constitutive equations based on the two-layer viscoplastic model were used to simulate the hot embossing process. The micro-cavity of the mould was completely filled by the polymer, and the elastic, viscous, and plastic behaviours were considered simultaneously in the simulation. Compression tests were performed to identify the model parameter values for poly-methyl methacrylate. A numerical simulation was performed to analyse the contributions of the polymer's elastic, viscous, and plastic behaviours. The unfilled area in the micro-cavity was evaluated after a displacement of 0.2 mm was applied to the mould. This was used as an indicator to compare the mould filling efficiency with those of the elastoplastic and elastic-viscoplastic constitutive models. The analysis led to the selection of an optimal elastic-viscoplastic model to completely fill the micro-cavity, which was consistent with the experimental results.

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Study on non-isothermal hot-embossing of polymer micro-prism array with efficiency and accuracy

Cited by 7 publications

References 32 publications

Response of preosteoblasts on micromachined Ti-6Al-4V surface to microstructure dimension

Response of preosteoblasts on micromachined Ti-6Al-4V surface to microstructure dimension

3D-MID Technology for Surface Modification of Polymer-Based Composites: A Comprehensive Review

Influence of elastic-viscoplastic behaviour on the filling efficiency of amorphous thermoplastic polymer during the micro hot embossing process

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