A new method for the continuous production of single dosed controlled release matrix systems based on hot-melt extruded starch: Analysis of relevant process parameters and implementation of an in-process control

2013 ◽  
Vol 84 (1) ◽  
pp. 156-171 ◽  
Author(s):  
Thomas Kipping ◽  
Hubert Rein
Keyword(s):  
Controlled Release ◽  
Process Control ◽  
Process Parameters ◽  
Continuous Production ◽  
New Method ◽  
Hot Melt

Time Synchronization in Tandem Hot Strip Line Based on Improved Broadcast Mode

2013 ◽  
Vol 341-342 ◽  
pp. 679-683
Author(s):  
Jian Zhao Cao ◽  
Dian Hua Zhang
Keyword(s):  
Control System ◽  
Process Control ◽  
Time Synchronization ◽  
Process Control System ◽  
New Method ◽  
Strip Line ◽  
Total Delay ◽  
Synchronization Problem ◽  
Hot Strip ◽  
Distributed Process

In order to solve the time synchronization problem in tandem hot strip line, the traditional algorithm of time synchronization was analyzed, and the server-client mode was compared with the broadcast mode using multithread technology, then the present paper improved the broadcast mode to improve its precision. The new method can estimate total delay including clock offset and network transmission time. A simple, easy and little loading time synchronization method was designed for the distributed process control system of tandem hot strip line. The new method was applied in domestic some tandem hot strip line successfully which showed that it could meet the demands of process control system with little expenses, simple structure and high precision.

Development, optimization and in vivo characterization of domperidone-controlled release hot-melt-extruded films for buccal delivery

2015 ◽  
Vol 42 (3) ◽  
pp. 473-484 ◽  
Author(s):  
Chinna Reddy Palem ◽  
Narendar Reddy Dudhipala ◽  
Sunil Kumar Battu ◽  
Michael A. Repka ◽  
Madhusudan Rao Yamsani
Keyword(s):  
Controlled Release ◽  
Buccal Delivery ◽  
Extruded Films ◽  
In Vivo Characterization ◽  
Hot Melt

Systems Analysis of Process Control Capabilities for Forging Accuracy

2017 ◽  
Vol 265 ◽  
pp. 1110-1115 ◽  
Author(s):  
V.G. Shibakov ◽  
D.L. Pankratov ◽  
R. Khairullin
Keyword(s):  
Process Control ◽  
Process Parameters ◽  
Systems Analysis ◽  
Simulation Modeling ◽  
Systems Approach ◽  
Dimensional Accuracy ◽  
Significant Process ◽  
Expert Analysis ◽  
Forging Force

The significance matrix for the parameters of “material-billet-equipment-process-tool-personnel-environment” system was compiled using the systems approach to the assurance of forging dimensional accuracy, and the expert analysis revealed the most significant process parameters that affect the accuracy. The application of simulation modeling helped to establish the dependence of forging force on the dimensions of an incoming billet. The paper suggests a solution to increase the accuracy of the sized forgings.

The Effect of the Initial Stress and Strain State in Sheet Metals on the Roller Levelling Process

2015 ◽  
Vol 651-653 ◽  
pp. 1023-1028 ◽  
Author(s):  
Markus Grüber ◽  
Marius Oligschläger ◽  
Gerhard Hirt
Keyword(s):  
Process Control ◽  
Initial Stress ◽  
Sheet Metal ◽  
Process Parameters ◽  
Kinematic Hardening ◽  
Sheet Material ◽  
Stress And Strain ◽  
Fe Model ◽  
Sheet Metals ◽  
Initial State

Due to increasing requirements regarding the flatness of sheet metals, the process of roller levelling is of particular importance. The process itself is influenced by a high number of parameters such as machine design, sheet dimension, and material properties. Therefore, it is desirable to provide an online process control to react on changes of those process parameters. One possible approach for the layout of a process control and the identification of reference values is the use of the Finite Element Method (FEM). Considering the alternate bending a sheet metal undergoes when passing through a roller leveller, kinematic hardening of the sheet material must be taken into account. Additionally, the initial stress and strain distribution of the sheet metal – e.g. induced by coiling – has an influence on the material behaviour and consequently on the process parameters. With respect to these effects, a coupled FE model, which accounts for the initial state of the sheet metal, is introduced. An inverse calculation of material parameters describing the behaviour under cyclic load conditions has been done for an aluminium alloy AA5005 and a mild steel DC01. Based on this numerical setup, the influence of the initial stress state in the pre-levelled sheet metal on the roller levelling process has been deduced. Accompanying experiments on a down-sized roller leveller were carried out for a validation of the numerical setup.

Optimization of Process Parameters of U-Shape Sheet Metal Based on Compensation of Geometric Springback Value

2012 ◽  
Vol 455-456 ◽  
pp. 1122-1127
Author(s):  
Xiang Wu Jia ◽  
Shu Gen Hu
Keyword(s):  
Sheet Metal ◽  
Process Parameters ◽  
New Method ◽  
Blank Holder Force ◽  
Technological Parameters ◽  
Blank Holder ◽  
Optimization Of Process Parameters

Taking example for U-shape sheet metal, the paper studies the forming and springback process with Dynaform, how much the springback influenced by several factors is studied, including die figure, stamping velocity, the stroke, the blank holder force and friction. Then a useful conclusion can be reached: Using die figure to optimize the technological parameters remarkably reduce the springback value, it provides a new method to control and solve the springback issue.

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