- Medical
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Value Added Secondary Services
In addition to continuously improving our molding capabilities, Hi-Rel Plastics & Molding, Inc. have years of experience in proven advanced molding technologies like
Used to bond two pieces of plastic together; produces weld that are relatively free of flash;
easy to automate; particularly suitable for high volume production.
Ultrasonic welding of plastic materials creates a molecular bond within the weld seam.
Longitudinal vibrations in frequencies of 20 kHz, 30 kHz, and 35 kHz with tool amplitudes
between 5 µm and 50 µm are introduced into the plastic materials under the action of force.
Ultrasonic vibrations are focused by means of special design of the components or tools. This
specific geometry within a component is referred to as energy director. The contact points in
the joining area are actively molded by means of energy input to achieve elastic deformation.
Friction occurring between the contact surfaces and within the molecule chains generates heat
that causes the material to melt.
