Ultrasonic measurement of residual wall thickness during gas assisted injection molding

2007 ◽  
Vol 47 (11) ◽  
pp. 1730-1739 ◽  
Author(s):  
E.C. Brown ◽  
L. Mulvaney-Johnson ◽  
P.D. Coates
Keyword(s):  
Injection Molding ◽  
Wall Thickness ◽  
Ultrasonic Measurement

The Use of Advanced Aluminum Alloys for Enhanced Productivity in Plastic Injection Molding

2000 ◽  
Author(s):  
Jim Nerone ◽  
Karthik Ramani
Keyword(s):  
Aluminum Alloys ◽  
Injection Molding ◽  
Wall Thickness ◽  
Simulation Software ◽  
Cooling Time ◽  
Coolant Temperature ◽  
Steel Mold ◽  
Cooling Channels ◽  
Injection Molding Simulation ◽  
Increased Strength

Abstract New aluminum alloys, QC-7® and QE-7®, have thermal conductivities four times greater than traditional tool steels, and have significantly increased strength and hardness compared to traditional aluminum materials. Molds were constructed of P-20 tool steel and QE-7® aluminum and were used to provide experimental data regarding thermal mold characteristic and confirm injection molding simulation predictions using C-Mold®. The relationships between cooling time reduction (using aluminum alloys) and polymer type, cooling channel depth, part wall thickness, and coolant temperature were explored both experimentally and using simulation software. It was shown that the potential reduction in cooling time varied from 5% to 25%. The most significant percentage improvements were observed in parts with part wall thickness of 0.05″ to 0.10″ and in molds with cooling channels at a depth ratio (D/d) of 2.0. The thermal pulses in the steel mold 0.10″ from the surface were approximately 63% larger than in aluminum mold.

Ultrasonic measurement of post-mastectomy chest wall thickness

1970 ◽  
Vol 43 (511) ◽  
pp. 458-461 ◽  
Author(s):  
S. M. Jackson ◽  
G. P. Naylor ◽  
I. J. Kerby
Keyword(s):  
Chest Wall ◽  
Wall Thickness ◽  
Ultrasonic Measurement

Ultrasonic measurement of micrometric wall-thickness loss due to corrosion inside pipes

2013 ◽  
Author(s):  
Julio C. Adamowski ◽  
Flavio Buiochi ◽  
Marcos Tsuzuki ◽  
Nicolas Perez ◽  
Claudio S. Camerini ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Ultrasonic Measurement ◽  
Thickness Loss

The Visualization Research on Cavitation Flaw of the Jubilance Toy's Part with Different Wall Thickness

2012 ◽  
Vol 479-481 ◽  
pp. 45-49
Author(s):  
Yong Li ◽  
Yu Xin Zhang ◽  
Zhi Qiang Sun ◽  
Rui Zhu Zhang
Keyword(s):  
Experimental Study ◽  
Injection Molding ◽  
Wall Thickness ◽  
Technological Parameter ◽  
Injection Molding Process ◽  
Kinetic Simulation ◽  
Molding Process

The injection molding process with different wall thickness may create the obvious cavitation flaw. So carried on the kinetic simulation of filling injection using plastic advisor with Pro/E software, and discussed the melt flows in the mould. Research the cavitation defect of the jubilance toy's part with different wall thickness, and forecast reasonably position and quantity of the cavitation, and through the change of formation technological parameter, obtained the relatively good formation technological combination, achieved the reduced flaw quantity. Which provided the theory basis to study and removes the product flaw, provided reference for the discussion injection CAE, indicated it had great singlenificance for the visualization experimental study.

scholarly journals A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Hyung-Pil Park ◽  
Baeg-Soon Cha ◽  
Soo-Bin Park ◽  
Jae-Hyuk Choi ◽  
Dong-Han Kim ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Temperature Distribution ◽  
Injection Molding ◽  
Temperature Change ◽  
Wall Thickness ◽  
Silicone Oil ◽  
Void Formation ◽  
Heat Transfer Analysis ◽  
Hollow Section

In fluid-assisted injection molding, the distribution of the residual wall thickness on the inside and outside of the curved area is different, and void is formed due to the effect of the shrinkage on the outside where the residual wall thickness is thicker. The shrinkage that takes place in the residual wall is affected by the rheological changes in the polymer caused by temperature change and also by the thermal properties of the penetration fluid. In this study, the different effects on void formation in residual wall during fluid-assisted injection molding were analyzed, and water and silicone oil that had different thermal properties were used for the fluids. For this, heat transfer analysis and injection molding analysis were conducted. The void formation occurred due to the different temperature distribution and volumetric shrinkage in the direction of the residual wall in the curved area with a hollow section. It was also found that the void formation in the curved area decreased in the case of silicone oil compared to the case of water from simulation and experiments.

An ultrasonic measurement of superficial femoral artery wall thickness

1989 ◽  
Vol 15 (8) ◽  
pp. 723-728 ◽  
Author(s):  
Kirk W. Beach ◽  
Carol A. Isaac ◽  
David J. Phillips ◽  
D.Eugene Strandness
Keyword(s):  
Wall Thickness ◽  
Femoral Artery ◽  
Superficial Femoral Artery ◽  
Ultrasonic Measurement ◽  
Artery Wall
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