Analysis of various plunger materials used in the container glass industry

The achievement of high impact strength has a basic influence on the further development of lightweight container glass. The tested articles were 11 nonreturnable flint glass water bottles, produced in the NNPB process. The impact strength of the flint container glass wäre was tested by repeated hitting on the upper contact area in the Shoulder. Four different plunger materials were tested in a 12 section AIS Emhart machine. The test run was structured in an experimental and an analytical part. The paper includes graphic and diagrammatic interpretations concerning the impact strength, the elements from the plunger materials contained in the glass and furthermore the change in the chemical composition of the plunger material after use. The aim of this analysis was to fmd an ideal plunger material, which satisfies the requirements of higher strength for lightweight glass Containers

Contact between hot glass and wet porous material : Part 2. Trials on a continuously operating container forming machine

The narrow neck press and blow process for the production of lightweight bottles uses a slender plunger. It is suspected that the plunger decreases the bursting strength and above all the impact resistance of the bottles by damaging the inner glass surface of the parison. It was the aim of the project to develop a "steam plunger" using a wet porous material, which would protect the glass surface by a developing steam layer between glass and plunger. Trials with different steam plunger constructions show that the production of bottles is possible with this system at normal production speeds. The bursting strength of the bottles produced was a little higher than that of the normal production; the impact resistance remains the same. Steam plungers, permeated by water from the inside, have a tendency to thermal instability The control of the water penetration is essential. The vulnerable point is the tip of the plunger. The control of the contact temperature of the plunger tip after the loading of the gob is very important. For the trials stainless steel was used for the plungers. The results show that, especially for the tip region, a material with a high heat penetration coefficient is advantageous. Bronze would be better than stainless steel. Parallel with the trials, a mathematical model was developed in order to understand better the behaviour of the steam plunger system. The results were in good agreement with the trials

Januar 2011

Kurzbezeichning: RPB (2011)Die Verpflichtungen aus der Richtlinie 98/34/E des Europäischen Parlaments und des Rates vom 22. Juni 1998 über ein Informationsverfahren auf dem Gebiet der Normen und technischen Vorschriften (Abl. EG Nr. L 204 S. 37), zuletzt geändert durch die Richtlinie 98/48/EG des Europäischen Parlaments und des Rates vom 20. Juli 1998 (Bl. EG Nr. 217 S. 18), sind beachtet worden. EU-Notifizierung Nr. 2010/576/D vom 18.08.201

Bewegungs- und Verschleißverhalten von Hartmetalllamellen bei der Betonbearbeitung

Die vorliegende Forschungsarbeit beinhaltet eine Analyse zum Bewegungs- und Verschleißverhalten von Hartmetalllamellen bei der Betonbearbeitung. Experimentelle und numerische Untersuchungen dienen in dieser Arbeit zur Modell-Verifizierung sowie zur Definition der Verschleißcharakteristika