| Titre : |
Injection molds for insulating stators and rotors : Overmolding as a prerequisite for cost-efficient, high-quality electric motors |
| Type de document : |
texte imprimé |
| Auteurs : |
Stefan Dürr, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 20-23 |
| Langues : |
Anglais (eng) |
| Catégories : |
Composants électriques et électroniques
Matières plastiques -- Surmoulage
Moules d'injection -- Conception et construction
Plastification
Polysulfures de phénylène
Rotors
StatorLe stator est la partie fixe d'une machine rotative. La partie rotative d'une machine, dite rotor, tourne normalement dans le stator. Des exemples de telles machines sont les pompes et les moteurs
Stator d'une machine électrique
Le stator d'une machine électrique est la partie stationnaire d'un moteur électrique ou d'un alternateur. Selon la configuration de la machine, le stator peut créer un champ magnétique qui par interaction avec le champ magnétique rotorique produit le couple électromécanique. Le stator peut être constitué d'aimants permanents ou d'électroaimants.
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Electrical components are made from conductive and nonconductive materials. Pressure of competition makes it necessary to reduce the number of components and work steps and to streamline assembly. The moldmaker Mühlbeyer uses a hybrid technology for manufacturing stators and rotors, in which the contact material and plastic are permanently bonded in one production step. |
| Note de contenu : |
- The insulating materials are as important as the conductor materials
- Mold components are more expensive at high mold temperatures
- Flow guides assist filling in thin-walled regions
- There are consequences to how precisely the inserts are positioned
- Figure : Various plastic-coated stators. During overmolding of the sheet components, not only insulation but also technical functions can be incorporated
- Fig. 1. Examples of plastic-coated rotors
- Fig. 2. Stator coated with a polyphenylene sulfide (PPS)
- Fig. 3. Plastic-coated stator with additional technical functions. U/V/W refers to the electrical connection (motor star connection, S = star point)
- Fig. 4. Fixed half of a 4-cavity injection mold for plastic-coated stators. Along side the main application of mold in close-up view
- Fig. 5. 4-cavity mold (moving half) for a stator, which runs on a round-table machine. It contains a CVe monitor for electronic mold monitoring, which displays number of shots, cycle time and percentage utilization on the display
- Fig. 6. Fully automated manufacturing line: the 4-cavity mold for stators – consisting of a mold upper part and two mold lower parts mounted on the round table – including handling, was designed and constructed by Mühlbeyer |
| En ligne : |
https://drive.google.com/file/d/1kpoAK4Uj71GbNkGQZNDBJQk0JXZfaYTt/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36173 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 6 (2021) . - p. 20-23
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