Download - Operating instruction
12 tearing sleeves - analyse
• Misapplication of handling: incorrect stretching
12 Analyse - tearing sleeves
methods of analysis• Ishikawa with interdisciplinary Team•assessment of return shipment / defectet parts•Own compression-tests at return defectet parts
excluded failure-cause:•Spuriousness bonding of materials
– Monitoring by new control mode of machine, temperature-monitoring, etc
•failure of raw material from supplier– comparison of material certificate showed no changes; adhesive application, glass
fabric, thread-count without difference
•Personal has adequate training
12 Analyse - tearing sleeves
measured (possible) causes:•No errors of this type for other customers, so we guess it is an individual handling mistake by customer.•Own tests (> 200) showed 100% clearly result: 200 parts tested:•100 parts tested by Westaflex-requirement: compression and stretching; 100 parts OK•100 parts tested against Westaflex-requirement: compression and stretching; 100 parts NOK•until now there is no described operator instruction for handling, it will occur temporarly to broken sleeves
12 operating-instruction for customerHeat-Protection-Sleeve / compression and stretching
1. Handling-Process: compression 2. Handling-Process: stretching
1.1: rotation-movement of the hand
1.2: concurrent compression of sleeve / concurrent push together the sleeve
2.2: concurrent streching the sleeve / concurrent uncompressing the sleeve
2.1: rotation-movement of the hand
appearance after compression appearance after stretching / initial situation
12 operating-instruction for customerHeat-Protection-Sleeve / compressing and stretching
operating-instructionhandling: compression
operating-instruction handling: stretching
12 operating-instruction for customerHeat-Protection-Sleeve / compressing and stretching
Misapplication of handling: incorrect stretching Procedure informations:
• exact hand-movements is necessary• hand-movement by compression-
process always in the same direction• hand-movement by stretching-
process always in the same direction• rotating movement of the hands
always simultaneous with compression and strechting