Development of a continuous injection direct rolling imprint system for microstructure thin-plate

Lou, Yan; Wu, G.Y.; Li, Jibin; Wang, Haixiong; Bai, Cong

doi:10.1007/s00542-016-3041-x

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…In the flow field analysis of the injection rolling zone, the inlet can be formulated as, P x = P in , P y = 0, P z = 0, T in = T 0 where P in is the component of inflow pressure in X direction and had a relationship with V R in value that summarized by experiments as P in = 1.72 V R [ 15 ], V R is linear velocity of roll and inflow temperature, T in , is equal to the initial temperature of polymer, T 0 .…”

Section: Experimental Methods and Simulationmentioning

confidence: 99%

“…As a newly developed molding technology, injection-rolling can achieve high precision replication of large-area complex microstructures on the polymer surface by creatively combining injection molding and rolling [ 15 , 16 ]. To describe the temperature distribution of the injection-rolling zone more accurately, a novel temperature model was developed through a mathematical analysis method considering the influence of heat radiation, heat conduction and plastic deformation [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

2021

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Polymeric optical sheets are significant components in large-scale display devices and are difficult to fabricate due to small size and high accuracy of large-area microstructures. As a newly developed molding technique, injection-rolling is capable of continuously and efficiently achieving large-area microstructures on the polymer surface with short time and high replication. However, the microstructure-forming mechanism during the injection-rolling process has not been fully understood. In this paper, a three-dimensional steady-state heat-flow coupling simulation model of the injection-rolling zone was established to obtain the distributions of the polymer state transition interfaces. According to the state transition interfaces, the entire microstructure-forming process was numerically simulated by dividing into filling and embossing stages to systematically analyze the effects of the polymer state transition interface on filling rate. After this, the relationship between process parameters such as injection temperature, rolling speed, and roll temperature and polymer state transition interface was investigated to develop a position prediction model of the state transition interface. In addition, the optical sheet injection-rolling experiments were also carried out to reveal that the filling rate of the microstructures on the optical sheet can be affected by varying the positions of the state transition interfaces. Therefore, the microstructure-forming mechanism could be revealed as theoretical guidance for the subsequent injection-rolling production with high quality and high efficiency.

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Section: Experimental Methods and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

2021

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“…The microstructure of the upper roller surface was simultaneously duplicated on the polymer surface, and a polymer guide light plate with the desired microstructure was obtained. 11…”

Section: Introductionmentioning

confidence: 99%

“…The microstructure of the upper roller surface was simultaneously duplicated on the polymer surface, and a polymer guide light plate with the desired microstructure was obtained. 11 Numerous studies have been conducted on metal roll-casting nozzle. 12,13 Two types of nozzle cavities, French Pechiney of 3C-type horizontal casting machine nozzle cavity and Fata Hunter caster nozzle cavity, are commonly used in the traditional process.…”

Section: Introductionmentioning

confidence: 99%

Injection-rolling nozzle in an imprint system with continuous injection direct rolling for ultra-thin microstructure guide light plate

Lou

Chen

Zhou

et al. 2021

Advances in Mechanical Engineering

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A novel Injection-rolling Nozzle (IRN) in an imprint system with continuous injection direct rolling (CIDR) for ultra-thin microstructure polymer guide light plates was developed to achieve uniform flow velocity and temperature at the width direction of the cavity exit. A novel IRN cavity was designed. There are eight of feature parameters of cavity were optimized by orthogonal experiments and numerical simulation. Results show that the flow velocity at the width direction of the IRN outlet can reach uniformity, which is far better than that of traditional cavity. The smallest flow velocity difference and temperature difference was 0.6 mm/s and 0.24 K, respectively. The superior performance of the IRN was verified through a CIDR experiment. Several 0.35-mm thick, 340-mm wide, and 10-m long microstructural Polymethyl Methacrylate (PMMA) guide light plates were manufactured. The average filling rates of the microgrooves with the aspect ratio 1:3 reached above 93%. The average light transmittance is 88%.

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Theoretical and experimental investigation of an ultrathin optical polymer light guide plate during continuous injection direct rolling

Feng

Lou

Lei

2021

Int J Adv Manuf Technol

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Development of a continuous injection direct rolling imprint system for microstructure thin-plate

Cited by 4 publications

References 17 publications

Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

Microstructure-Forming Mechanism of Optical Sheet Based on Polymer State Transition in Injection-Rolling Process

Injection-rolling nozzle in an imprint system with continuous injection direct rolling for ultra-thin microstructure guide light plate

Theoretical and experimental investigation of an ultrathin optical polymer light guide plate during continuous injection direct rolling

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