35kHz Rotary Welding Ultrasonic nonwoven
Sewing Machine sealing
Acoustic welding, and more particularly ultrasonic welding,
has become increasingly popular in a number of industries.For
example, businesses in the textile and personal products industries
often manufacture products such as diapers, clothing, etc., that
are ultrasonically welded. Ultrasonic
welding tools operate under the principle of applying acoustic
energy in the ultrasonic frequency range (i.e., at or above 20 kHz)
to a horn. The horn vibrates in response to the applied acoustic
energy to further produce an output acoustic energy. The output
acoustic energy is applied to the materials (typically
thermoplastics) being joined by positioning the horn in the
vicinity of the parts. The vibrational energy travels through the
parts, and at the interface between the parts, is converted to
heat. The conversion is due to intermolecular friction that melts
and fuses the parts together.
While a number of horn configurations have been developed, it
is well known that a good way to attain high quality and high speed
ultrasonic welds is to use a rotary horn with a rotating anvil.
Typically, a rotary horn is cylindrical and rotates around an axis.
The input acoustic energy is in the axial direction and the output
acoustic energy is in the radial direction. The horn and anvil are
essentially two cylinders positioned close to each other, rotating
in opposite directions with equal or nonequal tangential
velocities. The parts to be bonded pass between these cylindrical
surfaces at a linear velocity which usually matches the tangential
velocity of these cylindrical surfaces. Matching the tangential
velocities of the rotary horn and the anvil with the linear
velocity of the parts can minimize the drag between the horn and
the parts. Ultrasonics is also the method
of choice for these materials, for example for parting fabrics so
that there is no thickening of the material along the cut
edges. No consumables such as glue,
staples or sewing thread are needed. The fabric remains
intact, because no external thermal energy is directed into the
fleece. Position, shape and displacement of the welding points can
even support the desired properties of the composite.
Textiles is thus a field where ultrasonic technology
can prove its uniqueness.Characteristics:1. Seamming,trimming and
embossing without glue, thread or other consumables2. More faster
and cost effective than traditional sewing machine and adhesive
ways3. Eliminates fraying or unraveling of bonded edges and seams4.
Multifunctional and thousands of designs available5. Requires
minimum training and maintenance6. Super strong ultrasonic power
meets the needs of different fabric thicknessRPS-SONIC specializes
in manufacturing ultrasonic seam welding solutions for rotational
systems.Nuerous seam soldering devices have been developed over the
past years. From sonotrodes that can be installed in automated
assembly lines, the Elmrt35 ultrasounds sewing machine up to
customizations such as the PFW model devised for continuous welding
of pleated filters.There are two types of rotating modules for
these operations: with either a side or central sonotrode
resonating at a 35 kHz frequency and power varying from 600W to
1200W.These horns can be made out of aluminium, treated with a
special surface strengthening procedure, or titanium.Our seam
welding solutions are employed in binding synthetic textiles such
as PVC, polyester, polypropylene, coated, filtering and technical
fabrics. ItemParameterFrequency 35KHZPower800WWidth of
horn11.5mm (customized)Rotary horn diameter
107.5MM106MMAmplitude 25μm22μmRotary horn materialRapid steel
TitaniumHardness58HRC 30~32HRC An
ultrasonic sewing machine is versatile and easy to use in order to
seam, cut, slit, trim, tack, emboss, or to cut and seal at the same
time. The process used by every ultrasonic sewing machine is fast,
simple and efficient. It can seal up to 80 meters per minute
without the need for threads nor needles.
It is indeed a flexible technology. Due to the adaptability
of its design, it is possible to mount the sewing machine on a
workbench or to install it into semi or fully automated
systems.Advantage: Instead of needles,
thread, glues or other adhesives, ultrasonic sewing equipment uses
a patented rotary system, coupled with high-frequency vibrations,
to bond synthetic or blended materials containing up to 40 percent
natural fibers.Resembling a traditional sewing machine, the
ultrasonic sewing machine channels the ultrasonic vibrations
between a horn and rotating wheel, producing a localized heat
buildup which causes the synthetic fibers to soften and fuse. This
creates a strong molecular bond that's impervious to moisture.
Explains Alleman, "the resulting barrier seams are sealed, secure,
ultra-reliable and soft-to-the-touch without the safety issues
caused by stitch holes, glue gaps, fraying or unra
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