Nozzle and Hot Runner Systems for Injection Moulding Machines for the Manufacturing of Moulded Thermoplastic Composite Parts with Skin-Core Structure (Sandwich Mouldings)

Abstract:

Injection moulding of thermoplastic melts is based on the source flow. This principle allows for the production of mouldings in skin-core structure: the core enclosed on all sides by skin material may consist of a different or modified thermoplastic material. Generally, this method is referred to as co-injection or also sandwich injection moulding.Known applications of this method include processing of recycled material in the core and new material for the surfaces, foaming (chemically and physically) of the core material, processing of filled core material, e.g. Glass fibres and unfilled material for the surfaces. Other combined methods, e.g. with gas and water injection, are possible.The report describes the nozzles and hot runners developed by A&E Produktionstechnik Co. for the application of this method. Sample mouldings, produced and developed by customers and research cooperation partners, demonstrate the potentials and limits of the procedure in regard to the combination of different thermoplastic melts in a moulded part.

• Periodical: Key Engineering Materials (Volume 742)
• Pages: 535-543
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.742.535
• Online since: July 2017
• Authors: Volker Reichert*, Wolfgang Nendel
• Keywords: Coinjection Moulding, Injection Molding, Nozzles, Skin-Core-Layer

References

[1] F. Johannaber, Handbuch Spritzgießen, Carl Hanser Verlag, München, (2002).

[2] T. Nguyen-Chung, Strömungsanalyse der Bindenahtformation beim Spritzgießen von thermoplastischen Kunststoffen", dissertation TU Chemnitz, (2001).

[3] P. Egger u. a. Starke Partner - Coinjektionstechnik, Kunststoffe 11-2009, Carl Hanser Verlag, München, pp.26-30.

[4] T. Zipp, Fliessverhalten beim 2-Komponenten-Spritzgiessen, Verlag der Augustininus-Buchhandlung, Aachen (1992).

[5] S. Patcharaphun, Characterization and Simulation of Material Distribution and Fiber Orientation in Sandwich Injection Molded Parts, dissertation TU Chemnitz, 2006 http: /nbn-resolving. de/urn: nbn: de: swb: ch1-200601845.

[6] Ch. Jaroschek, Durch dick und dünn - Sandwich-Technik, VDI-Gesellschaft Materials Engineering, Spritzguss Spezialtechniken Schäumen und Sandwichtechnik, 21. 09. 2009 Hochschule Reutlingen.

[7] A. Kißler, Innovative Heißkanaltechnologie für ein optimales Farbwechselverhalten, lecture 26. 02. 2010, Technologie-Tag, Firma Konstruktionsbüro Hein, Neustadt/Rbg.

[8] Ch. Jaroschek, Spritzgießen für Praktiker, Carl Hanser Verlag, 2008, München.

[9] A. Hüttl, Thermoplaste und Schaum leicht kombiniert - Leichtbauteile im 2K-Sandwich-Spritzguss, Plastverarbeiter 10-2016, pp.18-182, Hüthig-Verlag, Heidelberg.

[10] V. Reichert, Flow Control with Valves Kunststoffe International 11-2009, pp.22-25, Carl Hanser Verlag, München.

[11] W. Nendel Flexible Technology Module, Kunststoffe International, pp.56-58, Carl Hanser Verlag, München.

[12] V. Goodship, Practical Guide to Injection Moulding, Rapra Technology Limited, ISBN: 1-85957-444-0.