Annealing & Stress Relieving Parts Photos
Ultem machining
Stress cracking in root of fins. Poor surface finish blocks light transmitting through material.
Stress relieving of material and custom designed cutting tool eliminates machining stress. Clear finish accomplished through vapor polishing.
Effects of stress in Polycarbonate
Instrument shield stress cracks in service.
Machine components while maintaining low stress levels. Final stress relieving cycle eliminates future stress cracking.
PPS machinined components
Washer requires heat treatment for 4 days at 600 degrees while maintaining flatness.
PPS Machined Component
Effects of stress on Polysulfone
Component must be machined with low to no stress. Part requirements dictate a final stress test for lot acceptability.
Polysulfone is very susceptible to stress cracking over time. Annealing cycle after machining removes material and machining stress. Components pass final stress test 100% of the time.
Vapor Polished Polycarbonate
Sample of Vapor Polishing on a Polycarbonate component
Polycarbonate Stress Cracking
Proper machining and stress reliving of a vapor polished polycarbonate part versus stress cracked polycarbonate component
Polysulfone Machining
Polysulfone benefits from post machining stress relieving. Polysulfone is stress sensitive and unannealed components can fail in service from thermal and mechanical loading. Parts that are stabalized will survive 3 second submersion in acetone without failure.
Examples of Parts Machined in Polysulfone
PPS Machining
PPS material annealed for 4 days to improve performance in high end device application
Stress cracking in polycarbonate
Example of polycarbonate stress cracking in ID. Part was drilled with incompatiable fluids. No noticable issue during manufacturing. Part crazed 2 days after completion.
Stress Analysis of Ultem Component
Analysis of stress in an ultem component. Part used in the semiconductor industry.
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