Download Bottle production and preforms: a design guide for PET by Ottmar Brandau PDF

By Ottmar Brandau

As a expert to the plastics undefined, Ottmar Brandau’s concentration is on utilizing his engineering knowhow and creation administration event to enhance caliber and productiveness, reduce cycle time and introduce secondary approaches similar to inline printing. This ebook is a completely sensible instruction manual that offers engineers and bosses with the toolkit to enhance construction and engineering points of their personal companies – saving funds, expanding output and bettering competitiveness by way of adopting new technologies.

In this booklet, Brandau covers the engineering features of bottle creation and the proper creation techniques (focusing on blow molding), besides plant format and association and creation administration, to provide the definitive guide for engineers and bosses alike.

  • Learn the methods of the alternate from an skilled engineer and manager
  • Save cash: sensible options to enhance cycle times
  • Increase productiveness: increase plant structure and association and enforce secondary approaches similar to inline printing

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Extra resources for Bottle production and preforms: a design guide for PET packaging

Example text

27 Wall thickness test unit: Infrared sensors can measure wall thickness during bottle inspection. (Picture courtesy of Krones AG). 1: PET Beverage Bottles 39 Especially for bottles designed for CO2-containing products, the bottom clearance is also determined. This means that the distance between the preform molding gate and the bottom surface of the bottle is measured. This value must not be zero or a negative figure because otherwise the bottle would rock. All measurements are first taken on empty bottles and then, in a next step, on bottles filled with the intended contents or with carbonated water.

1 What is FEM? An FE system will first divide the bottle shape into separate triangular or square elements (FEs). The smaller these individual elements are, the finer the resulting mesh will be. The finer the mesh, the more exact the computed results, but computation will also take much longer. , in the shoulder, in the base zone, near the special design elements such as grooves, and in the lateral area. In addition to the data on the contour geometry of the bottle, each mesh element is assigned data on the wall thickness.

2 Hot-fill Molds Although shell, full-body, and small-cavity molds are usually made of aluminum, hot-fill molds are made principally of steel. The reasons are to be seen in the thermal elongation of the mold material and the problem of adhesion. Molds for hot-fill bottles are heated to higher process temperatures (120–140 °C) in the body area to permit a certain relaxation and so partly eliminate the internal tensions set up in the bottle during the stretching process. 20 Hot-fill bottle, preform, and mold.

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