Processing Machinery
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PSU Adhesive Bonding Assembly
Problem Phenomenon
PSU parts have insufficient bonding strength coexisting with stress cracking; improper adhesive selection; assembly failure.
Cause Analysis
PSU surface characteristics affect adhesive wetting; solvent-based adhesives may induce stress cracking; curing shrinkage produces interfacial stress; improper surface treatment.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based solely on experience
Solution
①Select an adhesive system matched with PSU; ②Appropriate surface treatment; ③Control adhesive amount and curing conditions; ④Bonding strength and aging verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PSU bonding requires emphasis on both adhesive selection and process; stress cracking risk runs throughout; verification covers the use environment.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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