We call injected magnets those that have been manufactured through ferrite magnetic powders and also rare earths that have previously been incorporated into what we call thermoplastics, among which we highlight, above all, polyamides. They are a type of magnet much more resistant to any type of corrosion than those synthesized materials. We should not overlook the fact that maximum temperatures between 100 and 120 degrees Celsius are achieved.
Magnets can be injected or manufactured in special plastic polymers with particles that we have incorporated of ferrite or neodymium. Doing so will allow us to use all the usual possibilities of models for plastics to make designs with shapes and also with a special type of magnetization. Everything made from the needs of the client.
It is because of the different, unique
possibilities offered by this technology that we cannot speak of standard
sizes, and it is also what allows us to customize the magnet as much as
possible according to customer requests and the specific needs of the
application that is going to be given to it.
In the injection moulding process, a type
of solid binder is used, such as plastic, to which the magnetic type material
is attached, providing us with a large number of shapes. The resulting material
is isotropic.
Among the main advantages that we can find
in magnets that have been moulded by injection we can highlight the following:
possibility of making more complex shapes and structures; they are magnets that
have low conductivity and also low eddy currents; they are magnets with good
tolerance and are more resistant to jumping to compression in situations of
servitude; and they allow hybrid versions with combined properties; versions of
NdFeb, SmCo, alloy steel and ferrite and also Overmold, mould insert.
Advantages
of injected magnets
Among the main disadvantages of an
injection molded magnet are the following. The main disadvantage is that these
magnets will have a lower magnetic performance than those that have been made
by compression in bonded conditions. This happens because the magnetic load is
lower.
At present we find injection moulded
magnets in many everyday uses of which we are often not aware. From motors, to
sensors, magnetic components, etc.
We would like to highlight the injected
Neodymium magnets, as they are currently the most used and requested by
customers. These, in addition, are produced using the design and special needs
of the customer, so they have an exclusive use.
We must remember that it is currently
possible, through the process of stamping, both injection and compression, the
mixture of plastic materials with powders with a greater or lesser load of
Praseodymium-Neodymium. For this reason, it is possible to create, at the
customer's request, a type of mixture with very personalised characteristics
according to the required indications, both with very small tolerances and
quite the opposite.
These types of magnets have magnificent
mechanical properties that will make it possible to reach precise and adjusted
tolerances for each need, which makes it possible to achieve a perfect balance
and, furthermore, they allow for complicated geometries that adapt perfectly,
as the peculiarities and needs of the customers have been taken into account
for the realisation of this.
At IMA we manufacture plastic magnets for many
companies in different fields, such as manufacturers of electric motors,
household appliances or automobiles. Maximum temperatures of between 100ºC and
120ºC are obtained and allow us to solve the specific needs of each client.
If you have any questions or want more information about any of our products or services, fill out and send us the following questionnaire and we will attend you as soon as possible.
Contact Us
If you have any questions or want more information about any of our products or services, fill out and send us the following questionnaire and we will attend you as soon as possible.
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