Tài liệu Package Evaluation Training_ 2_package forming_customer

26/09/2012 Package Evaluation T i i Training Package Forming PE-02/2012-04-01 Agenda 1. Date printing 2. Flap sealing 3. Weight 4. LS Overlap 5. Crease line alignment (Tube twist) 6 Design 6. 7. Package defect name PE-02/2012-04-01 /2 1 26/09/2012 Package basic conditions The four basic package conditions are: • • • • Weight LS Overlap Crease line alignment (Tube twist) Design position All these conditions must be correct prior to any package evaluation. Otherwise restore “basic package condition”. PE-02/2012-04-01 /3 Terminology Agreement Symbol Description Legal Requirement related check Package Integrity related check Package appearance and line efficiency related check PE-02/2012-04-01 / 4 2 26/09/2012 1 D 1. Date t P Printing i ti Package Forming PE-04/2012-04-01 1. Date Printing Check the date and code printing Why: Legal Demand How - Visual check Printed code is visible and readable. ► Correct position/ information/code etc… ► Time on the package should be the same as time on the TPOP ► If necessary…. STOP the filling machine and adjust the date printing according to the instruction supplied with the printer. ► PE-02/2012-04-01 / 6 3 26/09/2012 2 Fl 2. Flap Sealing S li Package Forming PE-04/2012-04-01 2. Flap Sealing Why ► Flap sealing effect the line efficiency and package integrity How Unfold the flaps and check that they are properly sealed. ► On the bottom flaps the heat should not be directed on the TS. ► Burnt marks might impact on package integrity. ► PE-02/2012-04-01 /8 4 26/09/2012 3 W 3. Weight i ht Package Forming PE-02/2012-04-01 3. Weight (Volume) Weight the package - Why ► Legal demand ► Too high weight increase product loss ► Too low weigh could effect package forming and less internal p package g pressure which more difficult for flap sealing PE-02/2012-04-01 / 10 5 26/09/2012 3. Weight (Volume) Weight the package - How Set zero the balance with the empty package. Weight the filled package, read the weights and record the deviation if any. Correlate the weight to volume. ► To adjust the package weight, follow the instructions in the OM. ► Always check the weight again after adjustment ► ► PE-02/2012-04-01 / 11 4 LS 4. LS-overlap l Package Forming PE-02/2012-04-01 6 26/09/2012 4. LS-Overlap Why ► By y measuring easu g LS-overlap, S o e ap, ca can ccheck ec tthe e tube diameter and packaging material width. These are important parameters to produce well formed packages Distance B is Overlap PE-02/2012-04-01 / 13 4. LS-Overlap How Use the vernier caliper or steel ruler check the width of the overlap. ► If the overlap is out of the range indicated, corrective actions should be taken. Refer to OM for Overlap distance, Example ► PE-02/2012-04-01 / 14 7 26/09/2012 4. LS-Overlap Evaluation PE-02/2012-04-01 / 15 5. Crease Line alignment (Tube twist) Package Forming PE-02/2012-04-01 8 26/09/2012 5. Crease line alignment Why ► Visual inspection to verify the creases are correctly positioned. Incorrect crease positions will have an impact on package forming, and could cause mechanical tension tension. How ► Unfold the top flap and visual check for the crease line alignment. PE-02/2012-04-01 / 17 5. Crease line alignment Evaluation Tube twist Good < 1 mm If the distance > 1 mm  Adjust tube twist PE-02/2012-04-01 / 18 9 26/09/2012 6 D 6. Design i Package Forming PE-02/2012-04-01 6. Design Why ► Visual inspection to verify the packages are correctly formed. Badly formed packages could cause mechanical tension. How ► Visual check the preformed crease in the packaging material are correctly aligned along the edge of the package (top transversal crease). PE-02/2012-04-01 / 20 10 26/09/2012 6. Design Evaluation  Low crease position Adjust “ +” or “Clock wise” High crease position - Adjust “ ” or “Counter clock wise” PE-02/2012-04-01 / 21 6. Design Adjust the shape of the package PE-02/2012-04-01 / 22 11 26/09/2012 6. Design Adjust the shape of the package Guide: • Package Low crease position, Adjust “+” • Package High crease position, position Adjust “-” PE-02/2012-04-01 / 23 6. Design Fin crease terminology Top fin distance Bottom fin distance • TBA 100 B and TBA 125 S, fin crease = 6 mm • Other sizes, fin crease = 8 mm PE-02/2012-04-01 / 24 12 26/09/2012 6. Design Design position alternative 1. The easiest method for checking the correct design position is to cutt the th package k down d the th same as for f a strip t i tear t down d test. t t PE-02/2012-04-01 / 25 6. Design Design position alternative 2. Then looking at the insides of both the SA and LS pieces turn one of them around so that the two pieces of strip are on the same side side, the top of one piece over the bottom of the other. A > 2mm Design error = A/2 > 1 mm A • The design control will then need to be moved half the distance of the error A. • Design correction systems regulation loop regulate +/- 1 mm from nominal set point • Adjust the design error when it is bigger than 1 mm. PE-02/2012-04-01 / 26 13 26/09/2012 7 P 7. Package k D Defect f t Package Forming PE-02/2012-04-01 7. Package defect name Objectives ► To understand the defect appearance pp ► Able to give correct name to package defect when communication 14 26/09/2012 7. Package Defect Index ► Forming defect 1 1. Pinching 2. PPH torn and cloudy 3. Corners fold 4. Corner collapsed 5. Fin folding 6. Fin tears 7. Board crack a)) LS crack b) Corner crack 8. TS double folded 9. Wrinkle on/crossing TS 10. Wrinkle on opening area 11. Dented panels 12. Crocodile skin ► Appearance defect 13) Scratches 14) Bottom scuffing 15) Crease dent a) Horizontal b) Vertical 16) Outside PE blister 17) Squeeze from queing ► Integrity 18. TS Al-foil crack 19. K-crease crack leakage PE-02/2012-04-01 / 29 7. Package defect 1. Pinching - Forming Definition: Pinching is a wrinkled side panel, where the packaging material is “pushed together” and originated from the forming g of a package, normally made by volume flap or gap in forming roller. PE-02/2012-04-01 / 30 15 26/09/2012 7. Package defect 2. PPH torn and cloudy - Forming Definition: The o outside tside PE la layer er is torn/r torn/ruptured pt red or clo cloudy d in the PPH area when weak adhesion between outside PE and laminate layer. Torn Cloudy PE-02/2012-04-01 / 31 7. Package defect 3. Corner fold - Forming Definition: A corner fold is a dimple or “negative folding” of the corners both top and bottom corners, bottom. PE-02/2012-04-01 / 32 16 26/09/2012 3. Corner fold - Forming PE-02/2012-04-01 / 33 7. Package defect 4. Corner collapsed - Forming Definition: A big corner fold with double fold on the flap. More sensitive in the machines without crease wheel and shallow crease on packaging material. PE-02/2012-04-01 / 34 17 26/09/2012 7. Package defect 5. Fin folding - Forming Fin folding occurs on top transversal seal when TS bends on the reverse side creating a notable fold. PE-02/2012-04-01 / 35 7. Package defect 6. Fin tear - Forming Definition: A fin tear it’s a board crack that occurs where the top transversal seal meets the flap at the end of the fin corner. The fibres must be noticeable. Cosmetic fin tear PE-02/2012-04-01 / 36 18 26/09/2012 6. Fin tear - Forming TBA TWA PE-02/2012-04-01 / 37 7. Package defect 7. a). LS Board crack - Forming Defiinition: The board cracks are visually detected and the fibres must be noticeable. noticeable Board crack is located where the LS meets horizontal top/bottom crease. PE-02/2012-04-01 / 38 19 26/09/2012 7. Package defect 7. b). Corner crack - Forming Definition: The board cracks are visually detected and the fibres must be noticeable noticeable. A board corner crack is located on any of the eight corners of the package. PE-02/2012-04-01 / 39 7. Package defect 8. TS double folded - Forming Definition: A folded line on a p package g where the PM should be smooth. TS double folding can occur on the flaps of a package. PE-02/2012-04-01 / 40 20