2014
DOI: 10.1088/0960-1317/24/5/055007
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Development and experimental validation of an analytical model to predict the demoulding force in hot embossing

Abstract: During the demoulding stage of the hot embossing process, the force required to separate a polymer part from the mould should be minimized to avoid the generation of structural defects for the produced micro structures. However, the demoulding force is dependent on a number of process factors, which include the material properties, the demoulding temperature, the polymer pressure history and the design of the mould structures. In particular, these factors affect the chemical, physical and mechanical interactio… Show more

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Cited by 19 publications
(20 citation statements)
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“…Therefore, in this case, it could be postulated that the friction force took the dominate role in determining the demolding force. The trend as described above was affected by the pattern, the roughness, and the surface energy of the mold . Thus, the ratio of adhesion and friction for the composition of the demolding force was influenced by the surface properties of the mold.…”
Section: Resultsmentioning
confidence: 83%
See 1 more Smart Citation
“…Therefore, in this case, it could be postulated that the friction force took the dominate role in determining the demolding force. The trend as described above was affected by the pattern, the roughness, and the surface energy of the mold . Thus, the ratio of adhesion and friction for the composition of the demolding force was influenced by the surface properties of the mold.…”
Section: Resultsmentioning
confidence: 83%
“…Its mechanical properties (elastic modulus, E , shear modulus, G , and Poisson's ratio, v ) at various temperatures were derived from the models developed by Ames and Srivastava et al . PMMA's coefficient of thermal expansion (CTE) is 8.4 × 10 −5 K −1 . The work for each of the three components of the total work in Eq .…”
Section: Theoretical Analysis and Modelingmentioning
confidence: 99%
“…As for the PMMA material, C1 and C2 can be taken as 17.4 and 51.6, respectively [40]. The mechanical properties were obtained from the literature [41,42]. Figure 4 shows the initial geometry of the model, including the PMMA, the upper mold, lower mold, and mold core.…”
Section: Finite Element Modelmentioning
confidence: 99%
“…process include high-aspect-ratio, duty ratio and residual layer thickness [21]. Many researches mainly focused on the defects except the debonding problem about the mechanical mechanism and optimized method.…”
Section: Journal Of Photopolymer Science and Technologymentioning
confidence: 99%