Plastic Welding

At PAS we provide machine & tooling for various sorts of plastic welding. Such technique has the capacity to join plastics to other materials such as metals, not only does this technique has the advantage of joining similar & or dissimilar plastics but it also eliminates the need for consumables such as rivets and screws required by other mechanical joining methods. Some of the benefits of heatstaking are no noise, with certain joint design the parts can be disassembled and simultaneous formation of large quantities of bosses or inserts of different head design, sizes and on different planes. Some of the techniques include:

Vibration plastic welding is used to join large plastic parts through frictional heat and pressure generated in a linear or orbital motion (vibration). The surface of one part is vibrated against the other, which is generally fixed in a stationary position. Vibration welding lends itself to large or irregularly shaped parts and difficult to weld resins that do not work well with other methods. Vibration plastic welding produces high-pressure hermetic and very strong structural seals, and it is more forgiving (tolerance variations, wall thickness considerations) than most other methods. Closed Loop Process Controls.

Hot plate plastic welding is generally used to weld large and irregular shaped plastic parts with difficult contours and joint lines. Hot plate welding uses a heated platen to radiate heat through close proximity and melt the joining surfaces. After the part interfaces have been melted, the parts are brought together to form a molecular, permanent, and in many cases a hermetic seal. Hot plate welders are commonly available to join parts in either a vertical or horizontal plane.

An ultrasonic welding machine is used to join small and medium sized thermoplastic parts through pressure and high frequency mechanical vibrations (15 kHz- 40 kHz), creating localized frictional heat that melts the plastic together. When the vibrations stop, the plastic quickly cools and solidifies. Ultrasonic welding is quick, repeatable and does not require consumables. Hermetic seals can easily be obtained with ultrasonic welders. PAS ultrasonic welders run at 15 kHz, 20 kHz, 30 kHz, and 40 kHz frequencies.