Seam sealing

Chia sẻ: Pham Emy | Ngày: | Loại File: PPT | Số trang:18

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Gửi giả lên đến phòng thí nghiệm của mình để thử nghiệm, nếu ok phê duyệt và thực hiện theo cùng một điều kiện cho sản xuất Nếu không ok, làm lại các giả lập trong cùng một theo cách thức như trước nhưng với sửa đổi máy cài đặt.

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Nội dung Text: Seam sealing

SEAM SEALING PROCESS QUALITY DEPARTMENT
SEAM SEALING PROCESS 1. Send the fabric to the • seal tape supplier for testing and suggesting • the appropriate seal tape 2. Make mock up 40cm x 40cm from actual fabric and stitch in plus shape ( + ) with actual seal tape
MOCK UP TESTING 3. Send the mock up to its lab for testing, if ok approve & follow same condition for production If not ok , remake the mock up in the same manner as before but with revised machine settings.
SAMPLE OF TEST REPORT
TESTING PARAMETERS • THE BASELINE STANDARD IS 2000 mm water for 2 minutes • Then increase 1000 mm water for every 30 seconds • Keep increasing until you reach the breaking point.
GO TO PRODUCTION 4. The approved seam sealing machine setting must be clear to the operator and technician. the parameters must be available at the machine.
MACHINE SETTING STANDARD • SPEED OF THE MACHINE – 4 Meters/Minute • TEMPRATURE – 530 to 550 Degrees Celsius • HOT AIR PRESSURE – 1.1 to 1.3 kg/cm2 • ROLLER PRESSURE – 5 kg/cm2 • Generally this is the setting but it will be different for different fabrics and different machine brands.
ADJUST THE MACHINE AS STANDARD 6. make sure the machine setting is as per the approved standard.
WATER PROOFING TEST IN FACTORY 5. The output has to be tested atleast 2 times a day for water proofing ability of seal tape. while testing the pressure has to be 3 psi for 2 to 3 minutes. The record of test must be maintained & available at the machine.
TESTING MACHINE
WORKING PROCEDURE 7. Before starting seam sealing machine should be running idle for 5 minutes. 8. After joining the panels QC must check the seam & cut thread clean so that all topstitch will be smooth.
ATTACH SEAM SEALING Operator has to be careful while doing seam sealing to avoid breaking or joints. Do not use overlap seal tape more than once if there is a break. if more than once the seam becomes thick and stiff.
CONTROL PROCEDURE 9. After attach seam sealing tape QC check 100% all seams No puckering, must be smooth No open seam No run off seal tape
SEAM APPREARANCE MUST BE AS SMOOTH AS POSSIBLE AFTER SEAM SEALING.
CONTROL PROCEDURE 10. Water pressure testing is mandatory at the first out put every day. First 10 pcs of the day should be kept for testing but testing should always be done after atleast 30 minutes, so that seal tape is cool enough and bond properly. 11. Testing result must meet the standard time – minimum 2 minutes pressure – minimum 3 psi.
SEAL TAPE SPECIFICATIONS
COMMONLY USED SEAL TAPE
SEAL TAPE STORAGE