scholarly journals A Novel Continuous Extrusion Process to Fabricate Wedge-Shaped Light Guide Plates

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Wen-Tse Hsiao ◽  
Jui-Chang Lin ◽  
Keng-Shiang Huang ◽  
Chih-Hui Yang ◽  
Alexandru Mihai Grumezescu ◽  
...  
Keyword(s):  
Mass Production ◽  
Light Guide ◽  
Surface Deformation ◽  
Continuous Process ◽  
Thin Film Transistor ◽  
Plate Thickness ◽  
Extrusion Process ◽  
Close Relationship ◽  
Continuous Extrusion

Backlight modules are key components in thin-film transistor liquid crystal displays (TFT-LCD). Among the components of a backlight module, the light guide plate (LGP) plays the most important role controlling the light projected to the eyes of users. A wedge-shaped LGP, with its asymmetrical structure, is usually fabricated by an injection proces, but the fabrication time of this process is long. This study proposes a continuous extrusion process to fabricate wedge-shaped LGPs. This continuous process has advantages for mass production. Besides a T-die and rollers, this system also has an in situ monitor of the melt-bank that forms during the extrusion process, helping control the plate thickness. Results show that the melt bank has a close relationship with the plate thickness. The temperature of the bottom heater and roller was adjusted to reduce the surface deformation of the wedge-shaped plate. This continuous extrusion system can successfully manufacture wedge-shaped LGPs for mass production.

Interfaces in Multiphase Polymers and Nanomedicines

2012 ◽  
Vol 714 ◽  
pp. 211-215 ◽  
Author(s):  
Gergo Patyi ◽  
Zsombor Nagy ◽  
Balazs Vajna ◽  
Peter Anna ◽  
Gyorgy Marosi
Keyword(s):  
Extrusion Process ◽  
Structural Features ◽  
Continuous Extrusion ◽  
Multiphase Composite

Crystalline and amorphous interfaces were formed and modified in multiphase composite and pharmaceutical systems. Nanosize drug of antacid effect was prepared in continuous extrusion process. The structural features were analyzed using (micro-) thermal analytical and (micro-) Raman spectrometric methods combined with chemometric evaluation.

scholarly journals Hard Tissue Preservation in Minimally Invasive Mandibular Third Molar Surgery Using In Situ Hardening TCP Bone Filler

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Wilfried Engelke ◽  
Marcio Lazzarini ◽  
Víctor Beltrán
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Case Series ◽  
Third Molar Surgery ◽  
Hard Tissue ◽  
Socket Preservation ◽  
Bone Filler ◽  
Close Relationship ◽  
Bone Height

Background. Maintenance of hard tissue in the case of impacted third molars (M3M) with close relationship to the mandibular canal is still a surgical challenge which may be overcome using the inward fragmentation technique. Methods. A consecutive case series of 12 patients required the extraction of 13 impacted M3M with a close relationship to the inferior alveolar nerve (IAN). Via occlusal miniflaps, M3M were exposed occlusal under endoscopic vision and removed by inward fragmentation. All patients received socket preservation with resorbable in situ hardening TCP particles to reduce the risk of pocket formation at the second molar. Results. All 13 sites healed uneventfully. Bone height was assessed using CBCT cross-sectional reformats pre- and 3 months postoperatively. The bone height was reduced by 1.54 mm lingual (SD 0.88), 2.91 mm central (SD 0.93), and 2.08 mm buccal (SD 1.09). Differences were significant at a 0.05% level. No tissue invagination at the extraction sites was observed. Conclusions. Major bone defects can be avoided safely using inward fragmentation surgery. The self-hardening bone filler appears to enhance the mineralization of the intrabony defect.

scholarly journals In situ ozonolysis of polypropylene during extrusion to produce long-chain branches with the aid of TMPTA

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22531-22539 ◽  
Author(s):  
Guang-Jian He ◽  
Bing-Yu Yuan ◽  
Ting-Ting Zheng ◽  
Wen-li Zhu ◽  
Xiao-Chun Yin
Keyword(s):  
Extrusion Process ◽  
Secondary Products ◽  
Long Chain

The introduction of long-chain branches (LCBs) in polypropylene (PP) during the extrusion process is normally induced by peroxide chemicals which are known to cause to the formation of secondary products in the resin.

In-Situ Continuous Process for Bonding Glass-Fiber Reinforced Polypropylene to Wood

1999 ◽  
Author(s):  
Karthik Ramani ◽  
Michael Smith ◽  
Heming Dai
Keyword(s):  
Failure Modes ◽  
Continuous Process ◽  
Heating Time ◽  
Bond Line ◽  
Process Conditions ◽  
Processing Times ◽  
Lap Shear ◽  
Glass Fiber Reinforced ◽  
Anisotropic Fiber

Abstract Process conditions are developed for the manufacture of composite reinforcement for oak. Commingled glass and polypropylene fibers are consolidated in-situ on the surface of oak. Processing times from 30 to 120 seconds and pressures from .34 MPa to 1.4 MPa are tested. Micrographs of the composite and bond line reveal anisotropic fiber distribution in the composite, dry reinforcing fibers, voids, and incomplete consolidation. These microstructures are correlated with the processing problems which cause them, including insufficient heating time, poor matrix/glass mixing, and insufficient pressure to suppress void development. Lap shear strength and failure modes are related to microstructural features.

Claw-Pole Closed Forging Process

2014 ◽  
Vol 912-914 ◽  
pp. 605-608 ◽  
Author(s):  
Xuan Rong Xin ◽  
Ding Xu ◽  
Cheng Song He ◽  
Xin Cheng Liu
Keyword(s):  
Mass Production ◽  
New Technology ◽  
Extrusion Process ◽  
Forming Force ◽  
Short Life ◽  
Forging Process ◽  
New Process ◽  
Corner Filling ◽  
Hot Die Forging ◽  
Deform 3D

Aimed at the present domestic problems in the forging process of claw pole, such as insufficient corner filling, excessive forming force and short life of dies. On the basis of the analyzing in the claw pole, a new process named the closed hot die forging, direct extrusion process of claw pole is constituted. The numerical simulation using DEFORM-3D and the special mould are used in the forging experiment in order to check the new process. The results show that, new technology has greatly reduced the forming force, thereby reducing the production processes and improving the life of dies for mass production.

Microwave processing for the low cost, mass production of undoped and in situ catalytic doped nanosized SnO2 gas sensor powders

2000 ◽  
Vol 64 (1-3) ◽  
pp. 65-69 ◽  
Author(s):  
A Cirera ◽  
A Vilà ◽  
A Diéguez ◽  
A Cabot ◽  
A Cornet ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Mass Production ◽  
Low Cost ◽  
Microwave Processing
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