Designing for Linear Vibration Welding

Linear Vibration Weld Strength:

The linear vibration welding process produces a welded joint which, in many cases, yields a weld strength that is consistently equal to or stronger than any other area of the part. As a result, the weld area can most often be exposed to the same strains and stresses as any other area of the part.

Common Vibration Welded Materials:

  • Acrylonitrile Butadiene Styrene (ABS-Cycolac)
  • Acrylic-Styrene-Acrylonitrile (ASA-Geloy)
  • Cellulose Acetate (CA)
  • Cellulose Acetate Butyrate (CAB)
  • Cellulose Acetate Propionate, (CAP)
  • PolyOxy-Methylene (POM-Acetal & Delrin)
  • PolyAmide (PA-Nylon & Zytel)
  • PolyButylene Terephthalate (PBT-Valox & Enduran)
  • PolyCarbonate (PC-Lexan & Makrolon)
  • PolyCarbonate / Acrylonitrile- Butadiene- Styrene (PC/ABS-Cycoloy & Bayblend)
  • PolyCarbonate/ PolyButylene Terphthalate (PC/PBT-Xenoy)
  • PolyCarbonate/ PolyEthylene Terephthalate (PC/PET-Xylex & Makroblend)
  • PolyEthylene (PE)
  • PolyEthylene Terephthalate (PET-Polyester)
  • PolyMethyl MethAcrylate (PMMA-Acrylic & Lucite)
  • PolyMethylPentene (PMP-TPX)
  • PolyPhenylene Oxide (PPO-Noryl)
  • PolyPhenylene Sulfide (PPS-Ryton)
  • PolyPropylene (PP)
  • PolyStyrene (PS)
  • PolySulfone (PSO-Udel)
  • PolyVinyl Chloride (PVC-Vinyl)
  • PolyVinylidene Fluoride (PVDF-Kynar)

Vibration Welding Joint Design:

Joint design varies with each application and depends on factors such as type of plastic to be welded, part geometry and requirements of the weld. We recommend discussing joint designs with one of our application engineers before arriving at your final part design.

Other Vibration Welding Design Considerations:

  • Ideal parting line will be parallel to the force applied by the lift table.
  • Joint design must allow for sufficient collapse distance, insufficient collapse may cause poor weld strength/quality.
  • Joint and part clearance should allow for at least .100” linear movement between part halves.
  • Joint contours of more than 10 degrees parallel to the direction/axis of vibration will most often not produce welds of sufficient strength.
  • Parts must be rigid, flexibility in the part will result in poor welding.
  • Tall internal walls perpendicular to direction of vibration must be stiffened or they will not weld.