Support
"To do work properly, you must sharpen your tools first". In order to keep the machine in an optimum condition, and enhance its service efficiency, it is important to carry out proper daily maintenance, operate the machine correctly in accordance with the operation manual, and replace the expendable parts through time. If you have any problems related to the machine, contact us any time, we are ready to solve the problem for you as quickly as possible.
Automatic packing combination process introduction
SM-100 + SM-425 L Type Semi Automatic Flow
SM-120 + SM-525 L Type Full Automatic Flow
Packing material problems
Suitable conditions for proper sealing of thermal contraction film: time, temperature, pressure (the force used to cut the film with the sealing knife or heating wire) and tension (pulling force).
About sealing temperature
- Overheated sealing: the seal is loose and easy for it to break, there are fine pinholes on the seal and polymers stuck on the sealing knife.
- Proper sealing temperature: the seal is tight, soft and straight, and there are no polymers stuck on the sealing knife.
- Insufficient sealing temperature: there are serrations and/or fine pinholes on the seal, and the seal is loose and difficult to cut off.
Remedies for poor packages
- Melted breaking: Check pinholes, reduce the temperature of the shrinking machine, increase the speed of the shrinking machine, and adjust the wind speed of the shrinking machine.
- Ripples: Film bag size is too large, increase the temperature of the shrinking machine, decrease the speed of the shrinking machine, and increase the wind speed of the shrinking machine.
- Overlarge bevels: Reduce film bag size, reduce the temperature of the shrinking machine, increase the speed of the shrinking machine, and adjust the wind speed in the shrinking machine.
- Insufficient shrink (air blasted): Check pinholes.
Machine operation problems
Frequent problems for thermal shrinking machines
Problem 1: Packages will be creased or broken after being shrunk by the shrinking machine.
Possible causes:
- Creases／The shrinking machine' temperature is insufficient, or the conveyer belt runs too fast.
- Broken bags／The shrinking machine' temperature is insufficient , or the conveyer belt runs too slow.
Remedies:
- Adjust the temperature of the shrinking machine.
- Slow down the conveyer belt to eliminate creases; speed up the conveyer belt to eliminate broken bags.
Frequent problems for L type full Automatic sealing packing machines
Problem 1: L type seal is not tight, it is stuffed, and the package is broken after shrinkage.
Possible causes:
- Sealing knife is insufficiently preheated or is dirty.
- Sealing knife's rubber gasket is displaced, or heatproof paster is not applied.
- Lack of space for the film at the front and rear side of the electric eye device.
- Film is not well installed and fixed.。
Remedies:
- After preheating is completed, test and clean the sealing knife.
- Fix the rubber gasket and stick on the heatproof paster.
- Measure the space prepared for the film at the front and rear side again.
- Reinstall the film and fix it.
Problem 2: Scrap clip does not work smoothly.
Possible causes:
- The chain is worn and rusted.
- The scrap pot belt falls off or is broken.
Remedies:
- Lubricate the chain and make a test run.
- Check the scrap pot belt, replace if it is damaged.
Problem 3: When scrap clip chain is clipping, it fails to hold the upper and lower films evenly.
Possible causes:
- The film size is too small.
Remedies:
- Replace films (the film shall be 6 inches wider than the packing at both sides).
- Adjust the bracket under the material fixers, increase the height of the right fixer if the lower film fails to be held by the clip chain; and increase the height of the left fixer if the upper film fails to be held by the clip chain.
Problem 4. After shrinking, the package has tails
Possible causes:
- The hold down strips at both sides of the conveyer belt do not adjust to suit product size.
Remedies:
- Adjust the hold down strips to suit product size.
Problem 5. At the starting of the machine, the shrink film is broken by pulling.
Possible causes:
- Position of the material fixer on the shrink film device is incorrect.
Remedies:
- In consideration of the product size, measure the half-distance (A) between the upper and lower triangle spreaders, and put the shrink film on the right strutting board at the distance as that of (A).