Description of the Pressure/Throughput Behavior of a Single-screw Plasticating Unit in Consideration of Wall Slippage Effects for Non-Newtonian Material and 1-D flow

2006 ◽  
Vol 21 (3) ◽  
pp. 272-282 ◽  
Author(s):  
H. Potente ◽  
K. Timmermann ◽  
M. Kurte-Jardin
Keyword(s):  
Single Screw ◽  
Wall Slippage

Analytical Model for the Throughput and Drive Power Calculation in the Melting Section of Single Screw Plasticizing Units considering Wall-Slippage

2009 ◽  
Vol 24 (1) ◽  
pp. 31-40 ◽  
Author(s):  
H. Potente ◽  
M. Bornemann ◽  
M. Kurte-Jardin
Keyword(s):  
Analytical Model ◽  
Power Calculation ◽  
Drive Power ◽  
Single Screw ◽  
Wall Slippage

Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage

2002 ◽  
Vol 17 (2) ◽  
pp. 102-107 ◽  
Author(s):  
H. Potente ◽  
H. Ridder
Keyword(s):  
Single Screw ◽  
Wall Slippage

Analytical Model for the Throughput and Drive Power Calculation in the Melting Section of Single Screw Plasticizing Units considering Wall-Slippage

2009 ◽  
Vol 24 (1) ◽  
pp. 23-30 ◽  
Author(s):  
H. Potente ◽  
M. Bornemann ◽  
M. Kurte-Jardin
Keyword(s):  
Analytical Model ◽  
Power Calculation ◽  
Drive Power ◽  
Single Screw ◽  
Wall Slippage

Malar Augmentation With Self-drilling Single-Screw Fixation

2000 ◽  
Vol 2 (3) ◽  
pp. 222-225 ◽  
Author(s):  
Neal D. Goldman ◽  
Ramsey Alsarraf ◽  
Gary Nishioka ◽  
Wayne F. Larrabee
Keyword(s):  
Screw Fixation ◽  
Single Screw

A Model for Single-screw Plasticating Extruders

1989 ◽  
Vol 4 (4) ◽  
pp. 232-241 ◽  
Author(s):  
A. R. Vincelette ◽  
C. S. Guerrero ◽  
P. J. Carreau ◽  
P. G. Lafleur
Keyword(s):  
Single Screw

Modeling the Temperature Development of Wall-slipping Polymers in Single-screw Channels

2009 ◽  
Vol 24 (2) ◽  
pp. 106-113 ◽  
Author(s):  
M. Kurte-Jardin ◽  
H. Potente ◽  
K. Sigge ◽  
M. Bornemann
Keyword(s):  
Single Screw ◽  
Temperature Development

Analyzing the Influence of Surface Renewal on Diffusive Mass Transport in Vented Single-Screw Extruders

2017 ◽  
Vol 32 (3) ◽  
pp. 387-393 ◽  
Author(s):  
C. Marschik ◽  
B. Löw-Baselli ◽  
Jürgen Miethlinger
Keyword(s):  
Mass Transport ◽  
Surface Renewal ◽  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

Analyzing and Troubleshooting Single-Screw Extruders

2020 ◽  
pp. I-XIX
Author(s):  
Gregory A. Campbell ◽  
Mark A. Spalding
Keyword(s):  
Single Screw ◽  
Single Screw Extruders ◽  
Screw Extruders

Single Versus Dual Headless Compression Screw Fixation of Scaphoid Nonunions: A Biomechanical Comparison

Hand ◽  
2021 ◽  
pp. 155894472097411
Author(s):  
Luke T. Nicholson ◽  
Kristen M. Sochol ◽  
Ali Azad ◽  
Ram Kiran Alluri ◽  
J. Ryan Hill ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Qualitative Assessment ◽  
Secondary Outcome ◽  
Scaphoid Nonunion ◽  
Compression Screw ◽  
Single Screw ◽  
Headless Compression Screw ◽  
Significant Difference ◽  
Load To Failure ◽  
Headless Compression Screws

Background: Management of scaphoid nonunions with bone loss varies substantially. Commonly, internal fixation consists of a single headless compression screw. Recently, some authors have reported on the theoretical benefits of dual-screw fixation. We hypothesized that using 2 headless compression screws would impart improved stiffness over a single-screw construct. Methods: Using a cadaveric model, we compared biomechanical characteristics of a single tapered 3.5- to 3.6-mm headless compression screw with 2 tapered 2.5- to 2.8-mm headless compression screws in a scaphoid waist nonunion model. The primary outcome measurement was construct stiffness. Secondary outcome measurements included load at 1 and 2 mm of displacement, load to failure for each specimen, and qualitative assessment of mode of failure. Results: Stiffness during load to failure was not significantly different between single- and double-screw configurations ( P = .8). Load to failure demonstrated no statistically significant difference between single- and double-screw configurations. Using a qualitative assessment, the double-screw construct maintained rotational stability more than the single-screw construct ( P = .029). Conclusions: Single- and double-screw fixation constructs in a cadaveric scaphoid nonunion model demonstrate similar construct stiffness, load to failure, and load to 1- and 2-mm displacement. Modes of failure may differ between constructs and represent an area for further study. The theoretical benefit of dual-screw fixation should be weighed against the morphologic limitations to placing 2 screws in a scaphoid nonunion.

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