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10. Conclusions and outlook
The challenges specific to the extrusion blow-molding of large hollow bodies were reviewed, and the technical solutions for solving them were detailed: extruders, multi-layer or accumulation heads, thickness control devices, blow molds and post-cooling devices for geometry control. Finishing methods and product inspection were also discussed.
Far from being static, technology is constantly evolving to meet the ever-growing needs of an increasingly demanding industry and market. Key trends for the years ahead include :
the development of multi-layer tanks, mentioned in paragraph 4.3, which, following the market introduction of alcoholic gasolines (ethanol content of 5% to 10% for standard blends, rising to 85% or even 100% for special fuels), will gradually replace the less efficient surface treatment by fluorination;...
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Conclusions and outlook
Bibliography
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FLUENT ANSYS http://www.ansys.com
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Events
International Trade Fair for Plastics and Rubber -- K Trade Fair, Düsseldorf, Germany http://www.k-online.de
Standards and norms
- Determining the melt flow rate of thermoplastics, by mass (MFR) and by volume (MVR) – Part 1: Normal method. - ISO 1133 - 2011
- Methods for determining the density of non-cellular plastics – Part 1: Immersion method, liquid pycnometer method and titration method. - ISO 1183 - 2004
- Determining tensile properties – Part 1: General principles. Part 2: Test conditions for plastics for molding and extrusion....
Regulations
EURO5/6
Regulation (EC) N° 715/2007 of the European Parliament and of the Council of 20 June 2007 on type approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information. Official Journal of the European Union, L171/1 (29.6.2007)
Commission regulation (EC) N° 692/2008...
Patents
Method for controlling wall thickness in extruded tubular synthetic-resin blank. US 4279857
Process for manufacturing a fuel tank equipped with an internal accessory. EP 2155469
Process and equipment for manufacturing a fuel tank provided with internal accessories. WO2007088200
Directory
Basell Polyolefine GmbH (high-density polyethylene)
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BIELOMATIK (welding machines)
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