[China Packaging Network News] In the shrink packaging process, often encountered some problems such as shrink film flatulence, fog, fish eyes and other issues. These problems can be corrected by adjusting the settings of the machine, the temperature of the most commonly-adjusted packaging machine, the wind speed of the recirculation wind, the speed of the conveyor belt, the number of vent holes, and the shrink film size.
• Flatulence
Hot air remains in the shrink film
solution:
1, increase the number of vents to speed up the air leakage from the shrink film
2. Slow down the speed of the conveyor belt of the packing machine so that the hot air will leak out of the shrinking film for a longer time
3, increase the temperature of the packaging machine helps the air leak from the shrink film
• Atomization
The surface of the shrink film becomes blurred, like a mist
solution:
4, lower the temperature of the packaging machine, the temperature is too high is the cause of shrinkage film atomization
5, increase the speed of the conveyor belt of the packaging machine, so that the shrink film contact heat time is reduced
• Weak seal line
The shrinkage film's sealing line is easily damaged or small holes appear
solution:
6, the sealer heat seal knife temperature is lowered
7. The height of the sealing line is not correct. The height of the sealing line should be half the height of the package.
8, the pressure of the sealing frame is not even, although it is necessary to adjust the horizontal position of the sealing frame
9. The heat sealing knife or sealing base may become dirty, clean heat sealing knife or sealing base
10, the insulation of the sealing base is damaged, or the insulation adhesive pad or insulation adhesive can be replaced
11, the sealing time is too short, the sealing pressure disappears before the sealing line is not completely combined, the sealing time can be adjusted
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•Fisheye
Shrinking fisheye wrinkles on the surface of the shrink film
solution:
12, the temperature of the shrink packaging machine is too low, can increase the temperature of the packaging machine
13, shrink conveyor belt conveyor speed is too fast, can reduce the speed of the conveyor belt
14, The shrinkage of the packaging machine is too low to reduce the circulating wind power.
• crow's feet
A series of wrinkles appear on the corners and edges of the shrink film
solution:
1, too many holes in the shrink film, resulting in air leakage from the shrink film is too fast, the shrink film can not fully shrink, you can reduce the number of vents
16. The speed of the shrink conveyor belt is too fast, which can reduce the speed of the conveyor belt.
17, the temperature of the shrink packaging machine is too low, can increase the temperature of the packaging machine
18. The recirculation wind power of the shrink packaging machine is too low to reduce the circulating wind power.
• Dog ears
The shrink film forms a prominent triangular shape at the corner of the package
solution:
19, the shrink wrap of the wrapper is too large, the shrink wrap ruler can be made smaller
20, shrink conveyor belt conveyor speed is too fast, can reduce the speed of the conveyor belt
21, the shrinkage of the packaging machine is too low, can reduce the circulating wind power
22, the temperature of the shrink packaging machine is too low, can increase the temperature of the packaging machine
• wrong sealing and cutting position
The position of the sealing line should be half the height of the package
solution:
23, the height of the sealing conveyor belt is not correct, the height of the conveyor belt can be adjusted to a suitable position
24, the height of the sealing frame is not correct, you can adjust the height of the sealing frame to a suitable position
25, The wind direction of the recirculation winder of the shrink packer is incorrect, and the recirculation wind direction can be readjusted
26, the shrink wrap of the wrapper package is too large, can reduce the size of the shrink bag
• Crush packaging
Packing material to shrink film to deformation or crushed
solution:
27, the temperature of shrink packaging machine is too high, can lower the temperature
28, shrink conveyor belt conveyor speed is too slow, can increase the speed of the conveyor belt
29, the shrink wrap of the wrapper is too small to enlarge the shrink wand
30. The shrinkage tension of the shrink film used is too large and it is not suitable for the package. Use a shrinkage film with a low shrinkage tension.
• Zippered hole
Shrinking surface of zipper
solution:
31, playing breathable device to tear the shrink film, check the sealing machine blow breather device
32, the number of vents is not enough to increase the number of vents
• Sealing position is filamentous
Sealing position appears with filaments
solution:
33, the sealer's heat sealing knife temperature is too low, can increase the heat sealing knife temperature
34, sealing time is too short, can adjust the sealing time