Using a Visualization Mold to Discuss the Influence of Gas Counter Pressure and Mold Temperature on the Fountain Flow Effect

2018 ◽  
Vol 33 (2) ◽  
pp. 255-267 ◽  
Author(s):  
W.-R. Jong ◽  
S.-S. Hwang ◽  
C.-C. Wu ◽  
C.-H. Kao ◽  
Y.-M. Huang ◽  
...  
Keyword(s):  
Mold Temperature ◽  
Flow Effect ◽  
Fountain Flow ◽  
Counter Pressure

The effects of gas counter pressure and mold temperature variation on the surface quality and morphology of the microcellular polystyrene foams

2012 ◽  
Vol 127 (6) ◽  
pp. 4769-4776 ◽  
Author(s):  
Shia-Chung Chen ◽  
Ping-Shun Hsu ◽  
Shyh-Shin Hwang
Keyword(s):  
Temperature Variation ◽  
Surface Quality ◽  
Mold Temperature ◽  
Counter Pressure

scholarly journals Foaming morphology control of microcellular injection molded parts with gas counter pressure and dynamic mold temperature control

2014 ◽  
Author(s):  
Tai-Yi Shiu ◽  
Chao-Tsai Huang ◽  
Rong-Yu Chang ◽  
Shyh-Shin Hwang
Keyword(s):  
Temperature Control ◽  
Morphology Control ◽  
Mold Temperature ◽  
Counter Pressure ◽  
Molded Parts ◽  
Injection Molded

Numerical simulation of three-dimensional fiber orientation in injection molding including fountain flow effect

2002 ◽  
Vol 23 (2) ◽  
pp. 222-238 ◽  
Author(s):  
Kyeong-Hee Han ◽  
Yong-Taek Im
Keyword(s):  
Numerical Simulation ◽  
Injection Molding ◽  
Fiber Orientation ◽  
Three Dimensional ◽  
Flow Effect ◽  
Fountain Flow

Supersonic Natural Laminar Flow Effect on Axisymmetric Bodies with Sinusoidal Deformation

2014 ◽  
Vol 13 (0) ◽  
pp. 55-59 ◽  
Author(s):  
Naoko TOKUGAWA ◽  
Hiroaki ISHIKAWA ◽  
Yoshine UEDA
Keyword(s):  
Laminar Flow ◽  
Flow Effect ◽  
Natural Laminar Flow ◽  
Axisymmetric Bodies

Effect of Mold Temperature on Structure and Property Variations of PBT Injection Moldings in the Thickness Direction

2004 ◽  
Vol 19 (3) ◽  
pp. 303-307 ◽  
Author(s):  
M. Shibaya ◽  
H. Ishihara ◽  
K. Yamashita ◽  
N. Yoshihara ◽  
C. Nonomura
Keyword(s):  
Mold Temperature ◽  
Thickness Direction ◽  
Structure And Property

Multiple orifices in customized microsystem high-pressure emulsification: The impact of design and counter pressure on homogenization efficiency

2014 ◽  
Vol 248 ◽  
pp. 107-121 ◽  
Author(s):  
Jan Henrik Finke ◽  
Svea Niemann ◽  
Claudia Richter ◽  
Thomas Gothsch ◽  
Arno Kwade ◽  
...  
Keyword(s):  
High Pressure ◽  
Counter Pressure ◽  
The Impact

scholarly journals Study on External Gas-Assisted Mold Temperature Control with the Assistance of a Flow Focusing Device in the Injection Molding Process

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 965 ◽  
Author(s):  
Nguyen Truong Giang ◽  
Pham Son Minh ◽  
Tran Anh Son ◽  
Tran Minh The Uyen ◽  
Thanh-Hai Nguyen ◽  
...  
Keyword(s):  
Injection Molding ◽  
Temperature Control ◽  
Mold Temperature ◽  
Injection Molding Process ◽  
Melt Flow ◽  
Flow Focusing ◽  
Molding Process ◽  
Heating Efficiency ◽  
Flow Length ◽  
Insert Plate

In the injection molding field, the flow of plastic material is one of the most important issues, especially regarding the ability of melted plastic to fill the thin walls of products. To improve the melt flow length, a high mold temperature was applied with pre-heating of the cavity surface. In this paper, we present our research on the injection molding process with pre-heating by external gas-assisted mold temperature control. After this, we observed an improvement in the melt flow length into thin-walled products due to the high mold temperature during the filling step. In addition, to develop the heating efficiency, a flow focusing device (FFD) was applied and verified. The simulations and experiments were carried out within an air temperature of 400 °C and heating time of 20 s to investigate a flow focusing device to assist with external gas-assisted mold temperature control (Ex-GMTC), with the application of various FFD types for the temperature distribution of the insert plate. The heating process was applied for a simple insert model with dimensions of 50 mm × 50 mm × 2 mm, in order to verify the influence of the FFD geometry on the heating result. After that, Ex-GMTC with the assistance of FFD was carried out for a mold-reading process, and the FFD influence was estimated by the mold heating result and the improvement of the melt flow length using acrylonitrile butadiene styrene (ABS). The results show that the air sprue gap (h) significantly affects the temperature of the insert and an air sprue gap of 3 mm gives the best heating rate, with the highest temperature being 321.2 °C. Likewise, the actual results show that the height of the flow focusing device (V) also influences the temperature of the insert plate and that a 5 mm high FFD gives the best results with a maximum temperature of 332.3 °C. Moreover, the heating efficiency when using FFD is always higher than without FFD. After examining the effect of FFD, its application was considered, in order to improve the melt flow length in injection molding, which increased from 38.6 to 170 mm, while the balance of the melt filling was also clearly improved.

Effect of Mold Temperature and Additive Migration on Scratch Behavior of TPOs at Elevated Temperatures

Polymer ◽  
2021 ◽  
pp. 123709
Author(s):  
Kwanghae Noh ◽  
Jason Fincher ◽  
Robert Mimms ◽  
Hung-Jue Sue
Keyword(s):  
Elevated Temperatures ◽  
Mold Temperature ◽  
Scratch Behavior
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