5. Parison blowing

5.1 Draping, pinching and pre-inflating

Once the parison has been ejected, it is prepared for blowing into the mold. This is the role of the draping table, made up of several elements (figure 33 )

Stretchers (figure 33 , 1-2) spread the parison before the mold is closed, to make it match the bottom of the mold cavity as closely as possible. This action is called draping. Draping ensures reproducible positioning of the lower part of the parison.

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Parison blowing

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Bibliography

(1) - WOITE (B.) - Plastic fuel tanks, a solution for the future? - VDI – Verlag GmbH, Pastics in Automotive Engineering – Applications and recycling. Düsseldorf (1991), p. 227-267.
(2) - RAUWENDAAL (C.) - Polymer extrusion - Hanser Verlag,...

Software tools

FLUENT ANSYS http://www.ansys.com

BlowView https://extranet.imi.nrs.ca/english/Blowview

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...