Operating instruction
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- An analysis of tearing sleeves found the likely cause was incorrect stretching during handling by the customer. - Tests showed sleeves stretched according to requirements did not tear, while sleeves stretched against requirements did tear. - An operating instruction was created for the customer with details on the proper compression and stretching techniques, including simultaneous rotation and compression/stretching movements.
Operating instruction
- 1. 12 tearing sleeves - analyse • Misapplication of handling: incorrect stretching
- 2. 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
- 3. 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
- 4. 12 operating-instruction for customer Heat-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
- 5. 12 operating-instruction for customer Heat-Protection-Sleeve / compressing and stretching operating-instruction handling: compression operating-instruction handling: stretching
- 6. 12 operating-instruction for customer Heat-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
- 7. 12 operating-instruction for customer Heat-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