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