The Continuous Extrusion Process CONFORM: a full 3D Thermal and Mechanical Analysis

2000 ◽  
pp. 353-358
Author(s):  
A. Barcellona ◽  
L. Cannizzaro ◽  
R. Riccobono
Keyword(s):  
Extrusion Process ◽  
Mechanical Analysis ◽  
Continuous Extrusion

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.

Effects of Continuous Extrusion on Microstructure Evolution and Property Characteristics of Brass Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 2921-2924 ◽  
Author(s):  
Bing Li ◽  
Chun Hai Li ◽  
Xiang Jun Yao ◽  
Bao Yun Song
Keyword(s):  
Dynamic Recrystallization ◽  
Microstructure Evolution ◽  
Mechanical Treatment ◽  
Extrusion Process ◽  
Brass Alloy ◽  
Microstructure And Properties ◽  
Continuous Extrusion ◽  
Extruded Products ◽  
The Right

The continuous extrusion process would refine the microstructure effectively and increase the formability and properties of extrusion products, without preheating and post-mechanical treatment. During the continuous extrusion operation the microstructure of brass alloy significantly influences formability and properties. So the microstructure evolution rules of brass alloy during the whole continuous extrusion process were analyzed, and the hardness changing laws of the extruded brass alloy were also researched in this paper. By observing the microstructure evolution at different regions, the evolution rules of microstructure and properties of the continuous extrusion brass alloy were obtained. It was found that the dynamic recrystallization occurred at the right-angle bending region, which was proved by the hardness evolution of the extruded brass alloy. Therefore, it is feasible to control the properties of the extruded products by concentrating the right-angle bending region. This work gives the researching foundation of low formability materials based on continuous extrusion operation.

scholarly journals Recycling of Titanium Alloy Powders and Swarf through Continuous Extrusion (ConformTM) into Affordable Wire for Additive Manufacturing

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 843
Author(s):  
Sarah A. Smythe ◽  
Ben M. Thomas ◽  
Martin Jackson
Keyword(s):  
Titanium Alloy ◽  
Additive Manufacturing ◽  
Extrusion Process ◽  
Space Applications ◽  
Sustainable Supply Chains ◽  
Important Addition ◽  
Alloyed Titanium ◽  
Titanium Powders ◽  
Continuous Extrusion ◽  
Size And Morphology

Over the last 20 years, there has been growing research and development investment to exploit the benefits of wire deposition additive manufacturing (AM) for the production of near-net shape components in aircraft and space applications. The wire feedstock for these processes is a significant part of the overall process costs, especially for high-value materials such as alloyed titanium. Powders for powder-based AM have tight specifications regarding size and morphology, resulting in a significant amount of waste during the powder production. In the aerospace sector, up to 95% of forged billet can be machined away, and with increasing aircraft orders, stockpiles of such machining swarf are increasing. In this study, the continuous extrusion process—ConformTM—was employed to consolidate waste titanium alloy feedstocks in the forms of gas atomised powder and machining swarf into wire. Samples of wire were further cold-drawn down to 40% reduction, using conventional wiredrawing equipment. As close to 100% of the waste powder can be converted to wire by using the ConformTM process. This technology offers an attractive addition to the circular economy for manufacturers and, with further development, could be an important addition as industries move toward more sustainable supply chains.

Exploration on Continuous Extrusion Process Originate from Friction for Polymer

2011 ◽  
Vol 418-420 ◽  
pp. 1246-1250
Author(s):  
Zhi Xin Fan ◽  
Bing Song Mu ◽  
D.C Barton
Keyword(s):  
Stress Distribution ◽  
Extrusion Process ◽  
Polymer Extrusion ◽  
Theoretical Predictions ◽  
Continuous Extrusion ◽  
Simulation Results ◽  
Conform Process

This paper present exploration of polymer extrusion under melted temperature by conform process. The stress distribution of the process is described based on plastic mechanics. Solutions are presented and detailed comparisons are made between theoretical predictions and simulation results.

Analysis and Prediction of the Billet Butt and Transverse Weld in the Continuous Extrusion Process of a Hollow Aluminum Profile

2017 ◽  
Vol 26 (8) ◽  
pp. 4121-4130 ◽  
Author(s):  
Shumei Lou ◽  
Yongxiao Wang ◽  
Chuanxi Liu ◽  
Shuai Lu ◽  
Sujun Liu ◽  
...  
Keyword(s):  
Extrusion Process ◽  
Aluminum Profile ◽  
Continuous Extrusion ◽  
Transverse Weld

scholarly journals Deformation Zone Distribution of Continuous Extrusion Process

2015 ◽  
Vol 15 (2) ◽  
pp. 161-166
Author(s):  
Yong Li ◽  
Yuxin Zhang ◽  
Shiqiang Cui ◽  
Ruizhu Zhang ◽  
Yi Zhong
Keyword(s):  
Deformation Zone ◽  
Extrusion Process ◽  
Continuous Extrusion

scholarly journals Microstructural and mechanical studies of feedstock material in continuous extrusion process

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Tariku Desta ◽  
Devendra Kumar Sinha ◽  
Perumalla Janaki Ramulu ◽  
Habtamu Beri Tufa
Keyword(s):  
Yield Strength ◽  
Statistical Significance ◽  
Extrusion Process ◽  
Wheel Speed ◽  
Forming Process ◽  
Percentage Elongation ◽  
Continuous Forming ◽  
Before And After ◽  
Continuous Extrusion ◽  
Feedstock Material

AbstractThe challenge encountered in continuous forming process is the variation in mechanical strength of product formed with respect to process variables like extrusion wheel speed and diameter of product. In this research article, the micro-structural investigation of the aluminum (AA1100) feedstock material of 9.5-mm diameter has been carried out at various extrusion wheel speeds and diameter of product before and after deformation on commercial continuous extrusion setup TBJ350. The mechanical properties like yield strength as well as percentage elongation have been estimated and optimized using two variables with 3 levels through central composite rotatable design (CCRD) method. The mathematical modeling has been carried out to predict the optimum combination of process parameters for obtaining maximum value of yield strength and percentage elongation. The statistical significance of mathematical model is verified through analysis of variance (ANOVA). The optimum value of yield strength is found to be 70.939 MPa at wheel velocity of 8.63 rpm and product diameter of 9 mm respectively, whereas the maximum percentage elongation recorded is 46.457 at wheel velocity of 7.06 rpm and product diameter of 7.18 mm. The outcome may be useful in obtaining the best parametric combination of wheel speed and extrusion ratio for best strength of the product.

Polymer Nanocomposite Foams Prepared by Supercritical Fluid Foaming Technology

2002 ◽  
Vol 733 ◽  
Author(s):  
L. James Lee ◽  
Changchun Zeng ◽  
Xiangmin Han ◽  
David L. Tomasko ◽  
Kurt W. Koelling
Keyword(s):  
Cell Size ◽  
Cell Density ◽  
Polymer Nanocomposite ◽  
Extrusion Process ◽  
Clay Nanocomposites ◽  
Good Surface ◽  
Nanocomposite Foams ◽  
Continuous Extrusion ◽  
Foaming Technology ◽  
Reduce Cell Size

AbstractPolystyrene (PS) clay nanocomposites were synthesized and used to prepare foams in both batch and continuous extrusion process. It was found that the addition of a small amount of clay could greatly reduce cell size and increase cell density. Once exfoliated, the nanocomposite foam exhibits the highest cell density and the smallest cell size at the same particle concentration. Exfoliated microcellular nanocomposite foams with good surface quality was successfully produced using supercritical carbon dioxide.

scholarly journals Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2111
Author(s):  
Jaime Gálvez ◽  
Juan Correa Aguirre ◽  
Miguel Hidalgo Salazar ◽  
Bairo Vera Mondragón ◽  
Elizabeth Wagner ◽  
...  
Keyword(s):  
Loss Modulus ◽  
Complex Viscosity ◽  
Processing Parameters ◽  
Extrusion Process ◽  
Mechanical Analysis ◽  
Residual Energy ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Rheological Analysis ◽  
Acetyl Tributyl Citrate

One of the critical processing parameters—the speed of the extrusion process for plasticized poly (lactic acid) (PLA)—was investigated in the presence of acetyl tributyl citrate (ATBC) as plasticizer. The mixtures were obtained by varying the content of plasticizer (ATBC, 10–30% by weight), using a twin screw extruder as a processing medium for which a temperature profile with peak was established that ended at 160 °C, two mixing zones and different screw rotation speeds (60 and 150 rpm). To evaluate the thermo-mechanical properties of the blend and hydrophilicity, the miscibility of the plasticizing and PLA matrix, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), oscillatory rheological analysis, Dynamic Mechanical Analysis (DMA), mechanical analysis, as well as the contact angle were tested. The results derived from the oscillatory rheological analysis had a viscous behavior in the PLA samples with the presence of ATBC; the lower process speed promotes the transitions from viscous to elastic as well as higher values of loss modulus, storage modulus and complex viscosity, which means less loss of molecular weight and lower residual energy in the transition from the viscous state to the elastic state. The mechanical and thermal performance was optimized considering a greater capacity in the energy absorption and integration of the components.

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