scholarly journals RESEARCH ON NUMERICAL SIMULATION OF FORMING PROCESS FOR SINGLE SCREW EXTRUDER

2021 ◽  
Vol I (9) ◽  
Keyword(s):  
Numerical Simulation ◽  
Screw Extruder ◽  
Forming Process ◽  
Single Screw ◽  
Single Screw Extruder

Analysis of Melting Process and Numerical Simulation of Pure UHMW-PE Pipe Based on Molding in Barrel Technology

2009 ◽  
Vol 87-88 ◽  
pp. 250-255
Author(s):  
Jian Hua Qin ◽  
Chun Hui Liu ◽  
Wen Feng Gao ◽  
Chuan Hao Yu
Keyword(s):  
Numerical Simulation ◽  
New Technology ◽  
Melting Process ◽  
Raw Material ◽  
Temperature Control System ◽  
Screw Extruder ◽  
Forming Process ◽  
Molding Method ◽  
Single Screw ◽  
Single Screw Extruder

Ultra High Molecular Weight Polyethylene(UHMW-PE) pipe is a kind of pipe of thermoplastic engineering plastic with excellent comprehensive performance, but the difficulty in molding is a technical bottleneck which has already affected the extensive application of pipe of pure UHMW-PE. Molding in barrel on the Single screw extruder is a new technology of extrusion molding method, which can continuously carry out pipe of pure UHMW-PE, the most significant advantages of the technology are as follows: under the circumstances of no need to feed any additives in the whole forming process, it can continuously carry out pipe of pure UHMW-PE, and the extrusion molding speed of it is up to 12 m/h above. During the process of it based on molding in barrel technology, one of the main factors influencing to whether UHMW-PE pipe can be successfully molded or not is whether the melting process of raw material is adequate and appropriate or not. This article will elaborate melting characteristics of raw material of UHMW-PE, establishment of mathematical model of melting process, and numerical simulation of melting process, which belong to the forming process of molding in barrel, and will provide a theoretical basis for correctly designing the structure of single screw extruder and temperature control system of single-screw extruder, based on Molding in Barrel Technology.

Influence of Helical Grooved Structure on Mixing Process in a Single Screw Extruder

2013 ◽  
Vol 561 ◽  
pp. 212-217 ◽  
Author(s):  
Jian Wang
Keyword(s):  
Numerical Simulation ◽  
Groove Depth ◽  
Isothermal Flow ◽  
Mixing Process ◽  
Polymer Extrusion ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Single Screw ◽  
Extrusion Processing ◽  
Single Screw Extruder

Mixing performance is an important consideration in polymer extrusion processing. Besides a variety of mixing elements used in the extrusion industry, barrel also plays an important role to improve the mixing performance of the extrusion. The influence of helical grooved structure in inner wall of traditional single-extruder barrel on mixing process was investigated by using numerical simulation. POLYFLOW was used to calculate the 3D isothermal flow fields and mixing process of PVC-R in a single screw extruder with and without helical grooved barrel. Mixing performance of PVC-R in these two different structures was studied comparably. It was found that it could improve the mixing performance by helical grooved structure in the barrel, but a suitable groove depth of the helically grooved barrel should be calculated in order to avoid the extrusion throughput.

Production and Characterization of Porous Starch Granule and Poly(butylene adipate-co-terephthalate) Blend as a Bio-Composite

2012 ◽  
Vol 550-553 ◽  
pp. 1513-1521
Author(s):  
Sirirat Thothong ◽  
Klanarong Sriroth ◽  
Rattana Tantatherdtam ◽  
Amnat Jarerat
Keyword(s):  
Starch Granule ◽  
Rice Starch ◽  
Starch Granules ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Scanning Electron ◽  
Granular Starch

To improve the miscibility of native rice starch granules and poly(butylene adipate-co-terephthalate)(PBAT), rice starch was hydrolyzed by a mixture of α-amylase and amyloglucosidase. The obtained porous rice granular starch was then mechanically blended with PBAT by single screw extruder. Many pits and holes on the surface of starch granules were observed by scanning electron microscopy (SEM). The rough surface of the rice starch granules improved the compatibility of the polymers in the blends, which consequently increased the tensile strength and the elongation at break. In addition, SEM also revealed that the porous granules were homogeneously distributed in the polymer matrix with no appearance of gaps.

Sign in / Sign up

Export Citation Format

Share Document