Surface integrity analysis of ultra-thin glass molding process

Zhang, Zhen; Yang, Wei; Ming, Wuyi; Yin, Ling; Liao, Dunming; Zhang, Guojun

doi:10.1016/j.ceramint.2021.07.236

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Yang et al [2] established a finite element model for typical surface forming defects, effectively improving the production efficiency and glass quality. Zhang's team [18,19] attempted to analyze the surface integrity of ultra-thin glass using laser and thermal bending techniques. With the results of simulation and experimental studies, the glass forming temperature had a significant effect on the fracture rate, microbubble, and water ripple density.…”

Section: Introductionmentioning

confidence: 99%

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Chen

Zhang

et al. 2023

Metals

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In recent years, as an important functional material, glass has been widely used in architecture, electronics, optics, and other fields. As an emerging glass processing technology, the glass molding process (GMP) has received widespread attention and research in recent years. In this paper, we study the modeling and analysis of different heat transfer strategies for the energy efficiency of large-sized automotive instrument glass. The heat transfer model of the metal heating plate–conducting plate mold is established, the thermal energy efficiency in the forming process of large automobile glass is analyzed, and the energy efficiency of the mold in the heating stage is compared. The energy consumption per piece generated by the GMP heating device is reduced from 4865.2 to 4668.5 kJ, a reduction of 4.04%. By optimizing the heat flow density, the energy consumption per piece generated by the GMP heating device was reduced from 4865.2 to 4625.5 kJ, a reduction of 4.92%, meeting the sustainable manufacturing requirements.

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Section: Introductionmentioning

confidence: 99%

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Chen

Zhang

et al. 2023

Metals

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“…25 Recently, the formation of microbubbles was also observed on the ultrathin curved glass sheet. 26 It was determined that both molding temperature and pressure greatly affected the amount of the generated microdimples or microbubbles. 25,26 They mainly attributed the formation of microscale defects to the gas bubbles trapped at the interface.…”

Section: Introductionmentioning

confidence: 99%

“…26 It was determined that both molding temperature and pressure greatly affected the amount of the generated microdimples or microbubbles. 25,26 They mainly attributed the formation of microscale defects to the gas bubbles trapped at the interface. Moreover, the gas generation could be mitigated by increasing the pressing force, decreasing the roughness of the mold surface, or increasing the curvature difference between molds and glass preform.…”

Section: Introductionmentioning

confidence: 99%

“…For example, microdimples were detected as surface defect on the hot‐formed glass containers 24 and the molded chalcogenide glass lenses 25 . Recently, the formation of microbubbles was also observed on the ultrathin curved glass sheet 26 . It was determined that both molding temperature and pressure greatly affected the amount of the generated microdimples or microbubbles 25,26 .…”

Section: Introductionmentioning

confidence: 99%

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Characterization and growth mechanisms of adhesion‐induced microcavities during debonding of softened glass

Zhou

Zhu

et al. 2022

Int J of Appl Glass Sci

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The glass/mold interaction is crucial for controlling the surface quality of high‐precision glass products and elongating the lifespan of precious molds in hot forming techniques. Here we employ the probe tack test to separate a typical glass molding interface composed of N‐BK7 glass and tungsten carbide molds at different temperatures from 655 to 690°C. The macroscale debonding behavior translates from interfacial fracture to cohesive bulk deformation as temperature increases. The glass surfaces after debonding are covered by numerous randomly distributed cavities in micrometer. With temperature increasing, the maximum depth of microcavities greatly increases from less than 0.5 to over 10 μm; the area fraction overall increases and reaches 15% at maximum. These microcavities could result from the development of localized deformation at the gas‐trapping spots, due to the separation of the adhesive glass/mold interface. A large‐sized cavity evolves from the cyclic growth and coalescence of small cavities. For the interfacial fracture cases, cavities mainly propagate as cracks along the interface, and thus develop into shallow disc‐like shapes. However, for the cohesive cases, cavities prefer to grow in the bulk. The growth bifurcation could be governed by the competition between strain energy release rate and viscoelastic complex modulus.

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Study on shape deviation and crack of ultra-thin glass molding process for curved surface

Yang

Zhang

Ming

et al. 2022

Ceramics International

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Surface integrity analysis of ultra-thin glass molding process

Cited by 6 publications

References 25 publications

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Characterization and growth mechanisms of adhesion‐induced microcavities during debonding of softened glass

Study on shape deviation and crack of ultra-thin glass molding process for curved surface

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