| Titre : |
More precision for sensitive fast curing compounds : APC plus from kraussMaffei now available for thermosets |
| Type de document : |
texte imprimé |
| Auteurs : |
Cordula Wieland, Auteur ; Topic, Nicolina, Auteur ; Jan Hirz, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 20-23 |
| Langues : |
Anglais (eng) |
| Catégories : |
Charges (matériaux)
Composites à fibres de verre
Contrôle de processus adaptatif
Matières plastiques -- Moulage par injection
Thermodurcissables
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
They offer high stiffness, are heat and chemically resistant and flow freely into the machine: we are not talking about high-performance thermoplastic resins such as PEEK or PPS, but thermoset polymers. For processing these challenging materials, the large series specialist Baumgarten automotive technics employs the APC plus machine function from KraussMaffei. As a result, rejects have fallen significantly. |
| Note de contenu : |
- Less fluctuation in the cavity pressure signal
- Same OFT value - But different material behavior
- The volumetric filling of the cavity remains constant
- Parts with higher shot weights - trend and challenge
- Large-series application
- Fig. : Key to the vacuum pump cover is the absolutely flat functional surface. The challenge here is that the pronounced rib structure on the reverse side must not show through on the flat side. This can be solved by using PF thermoset compounds
- Fig. 1 : Precision parts with only 10 pm tolerance : the oil pump adjusting ring of PF (MD+GF) 70. Production has been running since 2014 in continuous three-shift operation on a CX200
- Fig. 2 : A 48-hour test (24 h without and 24h with APC plus) shows that the machine function significantly reduces the fluctuation band of the cavity pressure (NT = non-thermoplastics)
- Fig. 3 : The more highly filled, the lower is the material-specific compression curve. At 1000 bar pressure, the mass column of an organically filled PF is compressed by 3.7% ; at 80 % filling of glass fibers and mineral components, it is only 1,8%
- Fig. 4 : If the cylinder temperature rises by 2°C, and the mass becomes less viscous, APC plus switches to holding pressure at an earlier point and reduces the pressure level to prevent over-filling of the part |
| En ligne : |
https://drive.google.com/file/d/1QV1ov7Dn0AiQiI8JccYmAFGf_hIWyil4/view?usp=drive [...] |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31414 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 12 (12/2018) . - p. 20-23
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