Micromold-Based Laser Shock Embossing of Metallic Foil: Fabrication of Large-Area Three-Dimensional Microchannel Networks

Shen, Zongbao; Liu, Huixia; Wang, Xiao; Wang, Hejun

doi:10.1080/10426914.2010.532528

Cited by 21 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The molding experiments were performed on a homemade micro-hot embossing molding machine because micro-hot embossing is one of the most common patterning techniques. Transparent polymethylmethacrylate (PMMA) film of 0.8 mm (MH, Meihan Shinku Kogyo) was used as molding material because it can be easily patterned by micro-hot embossing process [10]. The glass transition temperature of PMMA film is about 110 C. The micro-featured mold insert was pressed into the molten PMMA films at a temperature upon the glass transition temperature (Tg) of the PMMA.…”

Section: Introductionmentioning

confidence: 99%

Micro-Hot Embossing of Fresnel Lens Using Precision Micro-Featured Mold

Kuo

Hsu

2013

Materials and Manufacturing Processes

View full text Add to dashboard Cite

Micro-hot embossing process has been widely used in the micromanufacturing. Development of a simple and cost-effective method for fabricating the micro-featured mold insert for micro-hot embossing molding is an important issue. Several techniques such as Si-based micromachining technology, lithographie galvanoformung abformung (LIGA), laser micromachining, micro-electro-discharge machining, micromachining, and deep reactive ion etching have been proposed for fabricating the micro-featured mold insert. However, these methods have some limitations including high cost, complex manufacturing processes, and long processing time. In this study, a simple and cost-effective method for fabricating micro-featured mold with micro-features for microfabrication of polymer was proposed. Effects of micro-hot embossing process parameters on the embossed accuracy of microfeatures were investigated. Results showed that the embossed accuracy of microgroove depth and width increased with both the embossing load and embossing temperature until a saturation value is reached. Based on both cycle time and green manufacturing, an approximately perfect Fresnel lens can be replicated under the embossing load of 50 Kgf and the embossing temperature of 170 C.

show abstract

Section: Introductionmentioning

confidence: 99%

Micro-Hot Embossing of Fresnel Lens Using Precision Micro-Featured Mold

Kuo

Hsu

2013

Materials and Manufacturing Processes

View full text Add to dashboard Cite

show abstract

“…Many new manufacturing processes, such as hydroforming [1][2][3], laser forming [4], water jet forming [5], and incremental forming [6][7][8][9][10], were introduced in the last decade. However, owing to high flexibility, the single-point incremental forming (SPIF) process has attained a great attention.…”

Section: Introductionmentioning

confidence: 99%

Guidelines for Tool-Size Selection for Single-Point Incremental Forming of an Aerospace Alloy

Hussain

Khan²,

Lin

et al. 2013

Materials and Manufacturing Processes

View full text Add to dashboard Cite

Single-point incremental forming (SPIF) is relatively a novel sheet forming process to produce small lots with low cost. In this article, guidelines for tool size selection for SPIF of an aerospace grade alloy (AA-2024) are presented. The role of tool size, with respect to sheet thickness employed, on the formability in SPIF (i.e., spifability) is clarified. The response surface method is employed in order to study the significance of sheet thickness (t o ) and tool radius (r) on the spifability. The results of analysis of variance (ANOVA) show that the sheet thickness and tool radius are not significant individually, however, a strong interaction between these parameters exists. Moreover, for a particular sheet thickness, there exists only one r=t o value at which the spifability can be maximized under a given set of conditions. Furthermore, for a given sheet thickness, if a tool with radius lesser than a particular value is used (i.e., r=t o < 2) the material squeezes out from the tool=sheet interface. And, such a condition adversely affects the material spifability. FEA using LS-DYNA has also been carried out.

show abstract

“…Thus, optimization of conformal cooling channel designs in terms of location and cooling channel size can be further investigated using computer simulation software [27]. The hot embossing stamps have a limited life compared to conventional metal stamps [28][29][30][31]. In order to enhance lifespan of a hot embossing stamp, stamp surface with wear-resistant hard coatings is still required.…”

Section: Resultsmentioning

confidence: 99%

Development of hot embossing stamps with conformal cooling channels for microreplication

Kuo

Chen

2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Hot embossing stamp fabricated from aluminumfilled epoxy resin can be employed for short-run productions. However, the cooling time is much longer compared to metallic stamps due to poorer thermal conductivity. Therefore, developing a hot embossing stamp with high cooling efficiency is an important issue. In this study, three different coolingchannel layouts were employed to fabricate hot embossing stamps using rapid prototyping and rapid tooling techniques. Effects of different hot embossing stamps on the cooling time during hot embossing molding were investigated. It was found that the reduction in cooling time about 92 % can be obtained when a hot embossing stamp with conformal cooling channels compared to the hot embossing stamp without cooling channels. The manufacturing cost reduction for a micro-featured hot embossing stamp with high cooling efficiency about 72 % can be obtained using the method proposed in this work.

show abstract

Micromold-Based Laser Shock Embossing of Metallic Foil: Fabrication of Large-Area Three-Dimensional Microchannel Networks

Cited by 21 publications

References 9 publications

Micro-Hot Embossing of Fresnel Lens Using Precision Micro-Featured Mold

Micro-Hot Embossing of Fresnel Lens Using Precision Micro-Featured Mold

Guidelines for Tool-Size Selection for Single-Point Incremental Forming of an Aerospace Alloy

Development of hot embossing stamps with conformal cooling channels for microreplication

Contact Info

Product

Resources

About