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Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”

  • P. F. Rios , M. Reuven-Zada , R. Kol , S. Yoffe and S. Kenig
Published/Copyright: September 9, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 28 Issue 3

The presence of weld lines can cause a significant reduction in the mechanical properties of injection molded plastic parts, especially when they contain minerals additives or fiber reinforcements, and it is a common reason for their failure. In this work a method for modifying the flow pattern in the weld line zone using a “flow disruptor” is proposed to strengthen the weld lines of fiber reinforced polypropylene. The flow disruptor is a small insert introduced inside the injection molding cavity, in the weld line area, and its objective is to mix the melt and disrupt fountain flow in order to blur and erase the weld line. The method is simple and low cost, does not require special machines or molds and does not affect the part shape or surface. Flow disruptors were designed, their effects analyzed by using simulation software, fabricated from different materials and encapsulated within injection molded tensile test samples for mechanical properties evaluation. The results of this work demonstrate that the mechanical properties in the weld line can be improved by the use of a well designed flow disruptor, made from suitable materials.

2 Mail address: Fabian Rios, Department of Plastics Engineering, Shenkar College of Engineering and Design, 12 Anna Frank St., Ramat-Gan, 52526, Israel. E-mail:

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Received: 2012-12-9
Accepted: 2013-2-25
Published Online: 2013-09-09
Published in Print: 2013-07-01

© 2013, Carl Hanser Verlag, Munich

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  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Climatic Ageing of Components of Polymer Based Electrochromic Devices
  5. Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
  6. Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
  7. Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
  8. Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
  9. Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
  10. Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
  11. Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
  12. Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
  13. Application of the Network Simulation Method to Flat Dies with Inverted Prelands
  14. In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
  15. Rapid Communications
  16. Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
https://doi.org/10.3139/217.2745

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Climatic Ageing of Components of Polymer Based Electrochromic Devices
  5. Previous Experimental Polymer Rheology Versus Flow Induced Crystallization
  6. Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders
  7. Distortion of Interfaces in a Multilayer Polymer Co-extrusion Feedblock
  8. Preparation and Characterization of PES and PA Composite Membranes for Air Separation at Low Pressures
  9. Impact of Feed Opening Width and Position on PVC Extrusion Process Effectiveness
  10. Irradiation Strategy for Laser Transmission Welding of Thermoplastics Using High Brilliance Laser Source
  11. Polytetrafluoroethylene Paste Extrusion: A Fibrillation Model and Its Relation to Mechanical Properties
  12. Improving Weld Line Strength of Fiber Reinforced Plastics By Means of A “Flow Disruptor”
  13. Application of the Network Simulation Method to Flat Dies with Inverted Prelands
  14. In Situ Polymerization of PET in the Presence of Pristine and Organo-modified Clays
  15. Rapid Communications
  16. Accurate Bio-scaling Processing of Micro Structured Shark Skin Based on Swelling of Polydimethylsiloxane
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
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