Ultrasonic insertion and staking
A metal insert is placed over a slightly smaller drilled
hole. The hole provides a certain amount for grip for the metal insert. The
vibrating action of the horn causes the plastic to melt, and the metal insert
is then firmly held in place. Inserts can be ultrasonically installed in most
thermo-plastics and some thermosetts.
Advantages of ultrasonic inserting
- rapid installation
- minimal residual stresses in the component following
insertion
- increased productivity
 Ultrasonic
staking
Ultrasonic staking is also referred to as riveting. By
controlling the flow of molten plastic a head can be formed by using the
pressure of the horn.
Ultrasonic riveting provides an alternative to welding
when the two parts consist of different type of materials which can not be
ultrasonically welded together.
- attachment of metal to plastic
- light pressure is required to form the head.
  
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