Injection Moulding / PUR

The Injection Moulding/PUR competence area deals with a wide range of issues from the idea to the finished product.

Innovative mould and process technology offers the possibility of integrating functions and downstream processes to achieve special part properties or economical production. Special processes are usually used here, such as multicomponent injection moulding, thermoplastic foam injection moulding, back film injection moulding or even injection compression moulding.

Core competencies

  • Material selection and development
  • Part design
  • Filling simulation and structural analysis
  • Back injection of plastic and metal foils for decorative or functional purposes
  • Other special processes
  • Process and tooling technology
  • Process development
  • Material and part testing
  • Material data determination
  • Microstructure and failure analysis

Seven modern injection moulding machines

  • Arburg Allrounder 570 H 2000 - 800
  • Fanuc Roboshot α-S150iA (2K injection moulding machine)
  • Krauss Maffei KM 120/380 PX
  • Engel e-motion 170/80 TL
  • Battenfeld Smart Power 60
  • Arburg Allrounder 275 V 250 - 70 (vertical machine)
  • Babyplast 6/10 P-T (micro injection molding machine)

Periphery for foaming

  • Somos Perfoamer
  • Sulzer Optifoam

Peripherals for Variotherm process

  • HB-Therm water-water technology
  • GWK Ceramic Water Technology

Peripherals for back film moulding

  • Short film feeding unit


  • Various other peripherals (temperature control units, hot runner controllers, handling devices)

  • Various injection moulds

  • Fully automated manufacturing cell Floorball to demonstrate the possibilities offered by digitization

  • High-pressure and low-pressure polyurethane plant

  • Thermoforming plant

Component and process simulation software:

  • Filling simulation Injection moulding: Cadmould; Moldex 3D
  • Mould design: Visi series
  • Structural analysis: Marc Mentat, ANSYS
Smart Factory at OST - fully digitalized manufacturing for the future.

OST has built a unique smart factory infrastructure to train students on the cutting edge of technology.

From the customized floorball ball to the ball-shooting machine for goalkeeper trainings.

The film combines various student projects on one topic - the emerging sport of floorball. The projects range from the production of the ball to the functional training machine for goalkeepers.

Reference books


Download Dynamic conformal cooling improves injectionmolding
Ehrig, F., Wick, C., Kirchheim, A., Katrodiya, Y., Zumofen, L.: The International Journal of Advanced Manufacturing Technology, 2021, Dynamic conformal cooling improves injectionmolding, 107-116, Springer-Verlag, Germany


Download Data Driven Injection Moulding
Wick, C., Ehrig, F., Schuster, G.: Advances in Polymere Processing, 2020, Data Driven Injection Moulding, 128-136. Springer-Verlag, Germany



SmartMarker – eine attraktive Markerungslösung
Wick, C., Grimm, S., KunststoffXtra 05/2024, p. 14-15

Sustainable thermoplastic composite parts through back injection molding of UD-tapes with recycled PET materials
Wick, C., Ehrig, F., Barandun, G., ANTEC2024, 03-2024

Thermoplastic foam injection moulding of ultralight structural components with highly reinforced edge layer
Ehrig, F., Barandun, G., Wick, C., ANTEC2024, 03-2024


Download Eine saubere Datenbasis als Grundlage
Wick, C., Studer, M., KunststoffXtra 11-12/2022, S. 30-33

Download Recycling, neue Produkte, Digitalisierung u.a.m.
Frank, E., KunststoffXtra 07-08/2022, S. 14-16


Download Thermoplast-Schaumspritzgiessen
Barandun, G.A., Wick, C., KunststoffXtra 11/2021, S. 14-15

Download On the Way to the Smart Injection Molding Factory
Part 2 of the Series: Integrated Data Acquisition for the Injection Molding Production
Wick, C., Ehrig, F., Schwendemann, D., Hänggi, R., Rüedy, A., Kunststoffe 09/2021, p. 6-9

Download Implementation of Industry 4.0 in Injection Molding and Compounding
Part 1 of the series: use cases based on strategic priorities in plastics processing
Rüedy, A., Hänggi, R., Budde, L., Ehrig, F., Wick, C., Schwendemann, D., Kunststofffe 07/2021, p. 10-13

Download Veränderungen im Spritzgiessprozess erkennen
Wick, C.: Veränderungen im Spritzgiessprozess erkennen, KunststoffXtra 6/2021, S. 24-25


Download Die Blende wird zum Human Machine Interface
Wick, C.: Die Blende wird zum Human Machine Interface, KunststoffXtra 12/20, S. 10-11

Download Thermoplast-Schaumspritzgiessen
Wick, C.: Thermoplast-Schaumspritzgiessen, KunststoffXtra 6/2020, S. 9-10

Download Polymeranalytik vom Feinsten
Affolter, S.: Polymeranalytik vom Feinsten, KunststoffXtra 3/2020, S. 18-19



Industry 4.0 and Digitalization in the Plastics Industry
Ehrig, F., Wick, C., ANTEC, St. Louis, March 2024


Ehrig, F.: Machine Learning zur Erkennung von Veränderungen, Swiss Plastics Expo, 23. Januar 2020

Ehrig, F.: Funktions- und Prozessintegration beim Spritzgiessen, Innovation Symposium, Swiss Plastics Expo, 21. Januar 2020, Luzern

Link zum Vortrag-Video


Ehrig, F.: Digitalisierung beim Spritzgiessen, Arbeitskreis Kunststofftechnik – VDI Bezirksverein Bodensee, BorgWarner Cooling Systems GmbH, Markdorf, 14. November 2019

Ehrig, F., Clifford, J.: 30 Seriennahe Kunststoffe im 3D-Druck zur Verkürzung der Entwicklungszeiten und Fertigung von Kleinserien, Additive Fertigung in Forschung und Praxis, ETH Zürich, Zürich, 24. Oktober 2019

Ehrig, F,: Das HSRlab an der HSR, Berufsbildnertagung 2019, Cham, 22. August 2019

Ehrig, F.: Funktions- und Prozess- Integration beim Spritzgiessen - Potenziale auch in 5 Jahren, 25 Jahre Arburg, Münsingen, 27. Juni 2019

Ehrig, F.: Impuls-Referat: «3D-Druck, Prototypenfertigung, Additive Manufacturing – Möglichkeiten und Grenzen», Digitalisierungsfrühstück, Rapperswil, 19. März 2019

Ehrig, F., Schuster G.: Machine Learning zur Erkennung von Veränderungen beim Spritzgiessprozess, VDI-Tagung Spritzgiessen, Baden-Baden, 19. Februar 2019


Ehrig, F.: Plastic and metal foil back injection moulding – Design and cool touch; Vortrag auf der Interreg-Konferenz Look and feel like metals, but design flexibility of plastics: New aspects of polymers and metal-polymer composites, 13. November 2018, Slovenj Gradec, Slowenien

Wick, C.: Erste Schritte zur Simulation des FDM-Verfahrens, «VPE-Swiss» Workshop, Von Anbietern für Anwender: «Additive Manufacturing: Simulation der Herstellprozesse», 05. September 2018

Ehrig, F.: 3D Printing of Biopolymers for Components, Vortrag im Rahmen des Workshops: 3D Printing of Biobased Materials for Applications in Manufacturing and Biomedical Devices, ISBBB, Guelph, Kanada, 26. Juli 2018

Ehrig, F.: Functional Integration in Technical parts, Faculty of Polymer Technology, 13. Februar 2018, Slovenj Gradec, Slowenien