Plastics News - Show Daily - October 17, 2023 - 15

FAKUMA SHOW DAILY
Plastics News, October 17, 2023 * 15
LEONHARDT
E.K.
Hall A5,
Booth 5206
Leonhardt
demonstrates twocomponent
" green "
ceramic molding at
Fakuma 2023.
Leonhardt has polished
mold inserts for LSR
integrated lenses
and light guides for
multibeam adaptive
driving beam headlights.
Leonhardt shows twocomponent
ceramic molding
By David Vink
Plastics News Correspondent
Hochdorf, Germany-based Leonhardt
e.K. has developed expertise
in ceramic materials, such as Dimacer
thermally and electrically
conductive and high abrasion-resistant
ceramic.
The 24 percent titanium carbide
is an alumina ceramic matrix,
along with metastable tetragonal
zirconia for brittleness reduction.
Dimacer can be formed by wire
electrical
discharge
machining
into mold inserts and extrusion
dies that can process highly abrasive
ceramic and powder metal
materials with lower tool wear
Customers
seek our
support in particular
when they seek
solutions to tricky
problems. "
Wolfgang Leonhardt
Leonhardt e.K.
than with steel, also for miniature
and micromolding. It is also used
for abrasion-resistant pump gears.
However, the company has
chosen Fakuma 2023 to highlight
its more recent introduction of
two-component ceramic injection
molding technology, demonstrated
live at Fakuma at the Leonhardt
booth on a 35-tonne Arburg
270 injection molding machine.
The technique enables high-temperature-resistant
ceramics to
bond with electrically conductive
ceramics, giving combined properties
needed in high-frequency
surgical equipment.
It is not easy. The two ceramic
components have different rates
of shrinkage
during sintering
of " green "
t wo - comp onent
moldings
to form a fi nal
part, which
clearly has
the potential
to weaken the
bond between
the two materials.
Leonhardt
founder and CEO Wolfgang
Leonhardt explains that use of
appropriate sinter additives and
conditioning ensures both components
shrink synchronously
under sintering heat. The Fakuma
demonstration
involves
overmolding
of an existing single
green component with another
green one. Sintering is not included
in the Fakuma demonstration.
Both Dimacer and the newer
two-component injection molding
technique were developed with support
from the IFKB institute for ceramic
component production technology
at University of Stuttgart.
Leonhardt has earlier developed
a 95 percent tungsten-powder-fi
lled compound with a PEEK
polymer matrix. This material
has been used to mold a precise
collimator lens housing demonstrator
with wall thicknesses
down to 0.12 millimeters by metal
injection molding, as alternative
selective laser sintering the parts
resulted in surface roughness
that cannot be polished away to
form the required smooth surface.
Leonhardt is in a good position
to assess this, as fi ne milling
and polishing, primarily of mold
components, is another prime
business activity.
By exhibiting at the 2022 and
2023 hy-fcell hydrogen and fuel cell
exhibition and conference in Stuttgart,
Germany, Leonhardt seeks
potential use for highly fi lled tungsten/PEEK
compounds in molding
fuel cell bipolar separator membrane
plates as an alternative to a
highly fi lled graphite compound.
Leonhardt's challenge in milling
and polishing expertise is
illustrated by mirror-fi nish polishing
mold inserts to surface
roughness of no more than 0.05
micrometers for liquid silicone
rubber integrated lenses and light
guides used in multibeam adaptive
driving beam headlights.
Half of Leonhardt e.K.'s sales
come with innovative developments
made well ahead of the
competition. As Wolfgang Leonhardt
said: " There is no giving up
at Leonhardt, and customers know
that. Customers seek our support
in particular when they seek solutions
to tricky problems. "
fimic.it
SKILLS:
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PRODUCTION
CAPACITY
OPTIMIZED RADIAL
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RECYCLING IS A GAME
WHERE SIZE MATTERS
Collimator lens housing
demonstrator molded in
95 percent tungsten.
Leonhardt e.K. photos
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Plastics News - Show Daily - October 17, 2023

Table of Contents for the Digital Edition of Plastics News - Show Daily - October 17, 2023

Plastics News - Show Daily - October 17, 2023 - 1
Plastics News - Show Daily - October 17, 2023 - 2
Plastics News - Show Daily - October 17, 2023 - 3
Plastics News - Show Daily - October 17, 2023 - 4
Plastics News - Show Daily - October 17, 2023 - 5
Plastics News - Show Daily - October 17, 2023 - 6
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Plastics News - Show Daily - October 17, 2023 - 21
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Plastics News - Show Daily - October 17, 2023 - 24
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