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, diminish cycle time and introduce secondary procedures similar to inline printing. This e-book is a completely functional instruction manual that gives engineers and executives with the toolkit to enhance construction and engineering points of their personal companies – saving cash, expanding output and bettering competitiveness through adopting new technologies.
In this ebook, Brandau covers the engineering points of bottle construction and the suitable creation techniques (focusing on blow molding), in addition to plant format and association and creation administration, to provide the definitive guide for engineers and executives alike.
- Learn the tips of the alternate from an skilled engineer and manager
- Save funds: sensible options to enhance cycle times
- Increase productiveness: increase plant format and association and enforce secondary methods akin to inline printing
Read Online or Download Bottle production and preforms: a design guide for PET packaging PDF
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Extra resources for Bottle production and preforms: a design guide for PET packaging
2 Process Finding During Mold Trials During the mold trials, the process engineer will adjust the initial parameters for heating and blowing based on his or her experience so that at least a fully blown bottle leaves the machine. , and the process parameters will then be optimized successively until the key milestone values are achieved. Then a larger sample run is started to produce a larger number of bottles for more detailed laboratory testing (typically 50–100 bottles). For these mold trials and the subsequent laboratory tests normally about 500 preforms will be required.
For certain countries, other storage times at different temperatures may be required. Hot-fill bottles are measured after the hot filling and again after they have been emptied and cooled down. For the determination of wall thickness distribution, nondestructive measurement techniques are increasingly replacing the simple micrometer test instrument for cut bottles. In measurements with the MagnaMike, for example, a small steel ball is placed in the bottle. Then a sensor is attached that will determine the wall thickness with an accuracy of 1 µm on the basis of the magnetic field, which will vary as a function of the distance.
In the most simple laboratory machines with a single station and a heating box, the preforms are fed manually. A more sophisticated variant will have automatic parison feeding and a continuous oven, although it will still have only a single blowing station. This setup allows several preforms to pass through the oven and be inflated successively. The performance of the blowing station can even be as high as that achieved with rotary machines. However, even smaller rotary machines with two to four blowing stations and a continuous oven section are used as laboratory machines.
Bottle production and preforms: a design guide for PET packaging by Ottmar Brandau