In the process of shrink packaging, often encountered some problems, such as shrinkage film flatulence, atomization, fish eye and other issues. These problems can be adjusted by adjusting the machine settings, the most frequently adjusted packaging machine temperature, wind speed, speed, conveyor hole, the number of holes and shrink film size.
Flatulence
Hot air is retained in the shrink film
Solution：
1, increase the number of air holes to speed up the air from the contraction film leakage
2, slow down the speed of the conveyor belt, so that the hot air has a longer time to escape from the shrink film
3. Increasing the temperature of the packaging machine will help air escape from the shrink film
Atomization
The shrink film surface becomes blurry, like mist
Solution：
4, reduce the temperature of packaging machine, too high temperature is the cause of shrinkage film atomization
5, increase the speed of the conveyor belt packaging machine, so that shrink film contact thermal time decreases
Weak sealing line
The sealing line of shrink film is easy to damage or the emergence of small holes
Solution：
6, the sealing machine heat sealing knife temperature down
7, the sealing line height is not correct, the sealing line height should be half of the height of the package
8, the pressure of the sealing frame is uneven, although the horizontal position of the sealing frame must be adjusted
9, heat sealing knife or sealing base may become dirty, clean heat sealing knife or sealing base
10. The heat insulation pad or heat insulation adhesive of the sealing base is damaged, and the heat insulation rubber pad or the heat insulation adhesive can be replaced
11, sealing time is too short, sealing pressure in the sealing line is not completely combined before the disappearance of the sealing time can be extended
Fisheye
Fish - like wrinkles appear on the surface of the shrinking film
Solution：
12, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
13, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt
14, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
Crow feet
A series of wrinkles appear at the angles and edges of the shrink film
Solution：
1, too many air holes in the contraction film, resulting in air from the contraction film leakage too fast, shrink film can not fully contraction, can reduce the number of holes
16, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt.
17, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
18, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
The dog - ear
Shrink the film at the corners of the package to form a prominent triangular shape
Solution：
19, wrapped bag shrink bag is too big, can shrink bag ruler inch smaller
20, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt
21, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
22, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
• error in cut position
The sealing line shall be at half the height of the package
Solution：
23 、 the height of the belt conveyor is not correct, the height of the belt can be adjusted to the right place
24, the height of the sealing frame is not correct, the height of the cage can be adjusted to the appropriate position
25 、 the wind direction of the contraction packaging machine is not correct, and the wind direction can be adjusted again
26, wrapped bag shrink bag is too big, can shrink bag ruler inch shrink a little
Crush the package
The packing presses the shrink film until it is deformed or crushed
Solution：
27, shrink packaging machine temperature is too high, you can lower the temperature
28, shrink packaging machine conveyor belt speed is too slow, you can speed up the conveyor belt
29, wrapped bag shrink bag is too small, can shrink the bag ruler inch enlarge a little
30, the contraction film contraction tension is too large, it is not suitable for the packaging, the use of lower shrink tension shrink film
Zipper shaped hole
The surface of the shrink film has a zipper like discontinuity
Solution：
31, blow through the hole device, tear the shrink film and check the sealing hole of the sealing machine
32, the number of ventilation holes is not enough, you can increase the number of vents
• cut the ends into filaments
There are filaments in the sealing and cutting position
Solution：
33, sealing machine heat seal knife temperature is too low, you can heat the sealing knife temperature higher
34 、 the sealing time is too short to shorten the sealing time
Flatulence
Hot air is retained in the shrink film
Solution：
1, increase the number of air holes to speed up the air from the contraction film leakage
2, slow down the speed of the conveyor belt, so that the hot air has a longer time to escape from the shrink film
3. Increasing the temperature of the packaging machine will help air escape from the shrink film
Atomization
The shrink film surface becomes blurry, like mist
Solution：
4, reduce the temperature of packaging machine, too high temperature is the cause of shrinkage film atomization
5, increase the speed of the conveyor belt packaging machine, so that shrink film contact thermal time decreases
Weak sealing line
The sealing line of shrink film is easy to damage or the emergence of small holes
Solution：
6, the sealing machine heat sealing knife temperature down
7, the sealing line height is not correct, the sealing line height should be half of the height of the package
8, the pressure of the sealing frame is uneven, although the horizontal position of the sealing frame must be adjusted
9, heat sealing knife or sealing base may become dirty, clean heat sealing knife or sealing base
10. The heat insulation pad or heat insulation adhesive of the sealing base is damaged, and the heat insulation rubber pad or the heat insulation adhesive can be replaced
11, sealing time is too short, sealing pressure in the sealing line is not completely combined before the disappearance of the sealing time can be extended
Fisheye
Fish - like wrinkles appear on the surface of the shrinking film
Solution：
12, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
13, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt
14, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
Crow feet
A series of wrinkles appear at the angles and edges of the shrink film
Solution：
1, too many air holes in the contraction film, resulting in air from the contraction film leakage too fast, shrink film can not fully contraction, can reduce the number of holes
16, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt.
17, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
18, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
The dog - ear
Shrink the film at the corners of the package to form a prominent triangular shape
Solution：
19, wrapped bag shrink bag is too big, can shrink bag ruler inch smaller
20, shrink packaging machine conveyor belt speed is too fast, you can speed down the conveyor belt
21, shrink packaging machine cycle wind is too low, you can turn the cycle of wind down
22, shrink packaging machine temperature is too low, you can increase the packaging machine temperature
• error in cut position
The sealing line shall be at half the height of the package
Solution：
23 、 the height of the belt conveyor is not correct, the height of the belt can be adjusted to the right place
24, the height of the sealing frame is not correct, the height of the cage can be adjusted to the appropriate position
25 、 the wind direction of the contraction packaging machine is not correct, and the wind direction can be adjusted again
26, wrapped bag shrink bag is too big, can shrink bag ruler inch shrink a little
Crush the package
The packing presses the shrink film until it is deformed or crushed
Solution：
27, shrink packaging machine temperature is too high, you can lower the temperature
28, shrink packaging machine conveyor belt speed is too slow, you can speed up the conveyor belt
29, wrapped bag shrink bag is too small, can shrink the bag ruler inch enlarge a little
30, the contraction film contraction tension is too large, it is not suitable for the packaging, the use of lower shrink tension shrink film
Zipper shaped hole
The surface of the shrink film has a zipper like discontinuity
Solution：
31, blow through the hole device, tear the shrink film and check the sealing hole of the sealing machine
32, the number of ventilation holes is not enough, you can increase the number of vents
• cut the ends into filaments
There are filaments in the sealing and cutting position
Solution：
33, sealing machine heat seal knife temperature is too low, you can heat the sealing knife temperature higher
34 、 the sealing time is too short to shorten the sealing time
