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Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability

Dedicated to Professor Eckard Macherauch on the occasion of the 80th anniversary of his birth
  • Gottfried W. Ehrenstein
Published/Copyright: May 31, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 97 Issue 12

Abstract

Sophisticated serial products require precise plastic parts that can be effectively manufactured employing the injection moulding process. However, the cooling of solid and molten material at the same time leads to high shrinkage, warpage and residual stresses. These processing characteristics determine the limits of dimensional stability that can be achieved with conventional injection moulding. A novel processing approach, in which the solidification is accomplished by pressure loading only, makes sure that these difficulties can be overcome. With this approach solidification takes place over the entire moulding at the same time. Investigations have been carried out into the viscosity, compressibility and thermal expansion of amorphous thermoplastics, which allowed evaluation of the physical pre-conditions for the novel moulding technique.

Keywords: Thermoplastic processing; Pressure; Compressibility; Thermal conductivity; Dimensional stability
* Correspondence address, Prof. Dr.-Ing. Dr. h.c. Gottfried W. Ehrenstein, Lehrstuhl für Kunststofftechnik, Universität Erlangen–Nürnberg, Am Weichselgarten 9, D-91058 Erlangen-Tennenlohe, Germany, Tel.: +499131/8529700, Fax: +499131/8529709. E-mail:

Refrences

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Received: 2006-4-13
Accepted: 2006-10-5
Published Online: 2013-05-31
Published in Print: 2006-12-01

© 2006, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101407
Keywords for this article
Thermoplastic processing; Pressure; Compressibility; Thermal conductivity; Dimensional stability

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. Microcracks in superalloys: From local in-situ measurements to lifetime prediction
  5. Residual stress development due to thermal cycling of the particle-reinforced alloy EN AW-6061– experiment and simulation
  6. Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
  7. The nature of the TRIP-effect in metastable austenitic steels
  8. Investigation and modelling of theplasticity-induced martensite formation in metastable austenites
  9. Thermal relaxation of residual stresses in TiN films deposited by arc ion plating
  10. On the Hall–Petch relation between flow stress and grain size
  11. Polymer-derived Si–C–N ceramics reinforced by single-wall carbon nanotubes
  12. Applied
  13. Strengthening of silicon nitride ceramics by shot peening
  14. Assessment of creep behaviour of the die-cast cylinder-head alloy AlSi6Cu4-T6
  15. New aspects of bending rotation fatigue in ultra-fine-grained pseudo-elastic NiTi wires
  16. Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
  17. Investigation of the thermoelastic response of long-fibre reinforced thermoplasticsby comparison with different non-contactstrain measurement techniques
  18. Effect of surface roughening on increasingthe spectral selectivity of cermet solarselective absorbers
  19. Experimental observations on thecorrelation between microstructure andfracture of multiphase steels
  20. Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability
  21. DGM News
  22. DGM News
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