Ferrites ? injection moulded0 pages

KOLEKTOR MAGNET TECHNOLOGY GmbH

KOEROX I

KOEROX I
TM

Injection Molded Ferrite

Koerox Imagnets are made by injection molding. The manufacturing methods used
eliminate the need for machining and permit the production of close-toleranced
ready-to-install parts. In addition, injection molding makes it possible to connect the
magnets directly to shafts or other components. Diverse shaping possibilities
combined with insert and composite techniques and the typical toughness of plastics
allow the production of complex magnets offering new and cost-effective solutions in
design and manufacture.
Hard ferrite-based, plastic-bonded, isotropic and anisotropic permanent magnets
from KOLEKTOR MAGNET TECHNOLOGY GmbH are made by injection molding and supplied
under the names Koerox I PA and PS. As well as the low cost and wide availability of the
magnet raw material, they offer good mechanical properties, high edge strength and the
advantage that they can be molded to almost any shape with close tolerances.
Through the use of appropriate binders, magnets can be used at high operating
temperatures.

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PLASTIC-BONDED HARD FERRITE MATERIALS, INJECTION MOULDED

Thermoplastic-bonded hard ferrite is an almost ideal engineering material combining
many desirable properties. Magnetic components made of this material are finding
significant use in electric motors and generators, and in magnetic sensors,
particularly involving the development of improved sensing elements. Diverse
examples of the material’s use are found in the automotive area, and the number of
applications is set to grow still further.
Over the years demands have become more complex and more sophisticated
manufacturing methods have been developed to meet them. Figs 1 to 4 show
typical products incorporating KoeroxImagnets.
The ability to orient and magnetize the ferrite particles in the plastic matrix in
almost any desired way during the manufacturing process makes this material far
superior to isotropic, sintered, hard ferrite from a magnetic point of view, opening up
many new applications as well as opportunities for cost-effective substitution.
From the mechanical point of view KoeroxImagnets offer even more advantages
over sintered magnets. Insert technology makes it possible to integrate shafts,
bushings and many other elements to perform secondary mechanical functions;
interference fits and centered fits are possible. Many processes in the further
processing of the magnets can be automated through collaboration between
manufacturer and user. Because hard ferrite is available in abundance, magnets can
frequently be used to perform secondary bearing and rive functions (pinions) using
cost-effective joining techniques.
An increasingly important area of use is in automotive engineering. Components
based on Koerox Ican be used at operating temperatures up to 200°C (e.g. in
engines and transmissions) through the use of PPS binders. The trend towards
non-contacting sensors in the automotive field is opening up more and more
applications. Important parameters, which directly affect the accuracy of the overall

Location of document: http://www.kolektor-kmt.de/products/pdf/magnets/KoeroxI.pdf

Last update: 10.08.2009