Continuous Band Sealer Sealing Is Not Strong ?

The continuous band sealer is a new generation of automatic sealing machine which integrates sealing, printing and continuous conveying. The continuous band sealer has the characteristics of clear printing, printing and drying, color selection and convenient word change. It is a sealing device with less investment, simple and convenient operation and high efficiency.

The continuous sealing machine has been used for a long time, especially in the case of continuous operation and overload, it is prone to some electrical failures and mechanical failures, such as: the sealing is not strong, the machine stops and stops, the fuse is blown at the start, and the operation is issued. Beep, temperature can not be controlled, the finished bag is deformed and bent at the seal, and bubbles or irregular marks appear at the seal of the seal. Based on the actual experience, this paper analyzes the cause of the sealing of the continuous sealing machine and proposes a corresponding solution.

1. The seal is not strong

Sealing is not one of the common failures of the continuous sealing machine. The sealing is not strong. There are three layers of meaning: 1 The sealing of the bag cannot be sealed;

2 Under the pressure of the sealing knife, although the bag is sealed, it is squeezed slightly or Peeling and peeling, the seal will be cracked again; 3 When the peeling test is carried out on the sealing part, half of the sealing is firm and half separated. The quality of the sealing of the bag is still unsatisfactory, because the contents are squeezed during storage and transportation. Easy to miss. This situation often occurs when the composite lining is OPP and blown PE.

1.1 The main causes of the first type of failure are the following.

(1) The heat sealing temperature is not enough. Under normal circumstances, the composite bag with OPP as the lining, when the total thickness of the bag is 80-90 μm, the heat sealing temperature should reach 170-180 °C; the composite bag made of PE as the lining Total bag thicknessWhen it is 85 to 100 μm, the temperature should be controlled at 180 to 200 °C. As long as the total thickness of the bag is increased, the heat sealing temperature must be increased accordingly.

(2) Heat sealing speed is too fast

Sealing is not related to the speed of the sealing machine. If the speed is too fast, the seal will be transferred to the cold pressure for cooling in the future, and naturally it will not meet the heat seal quality requirements.

(3) The pressure of the cold-pressing rubber wheel is not suitable. There is one upper and lower of the cold-pressing rubber wheel. The pressure between them should be moderate. When adjusting the pressure, only the spring should be clamped.

(4) There is a problem with the quality of the heat-sealed film

Sealing is not related to the quality of the heat-sealing film. If the corona treatment of the composite lining is not uniform, the effect is not good, and it appears at the sealing place, and it is certainly impossible to seal. This situation is rare, but once it appears, the product is bound to be scrapped. Therefore, in the color printing and packaging industry, it is the next process of supervision of the next process. Once the quality problem is discovered, the cause must be analyzed and solved in time. If there is moisture or dirt in the seal, it will also cause the seal to be weak. In short, to solve the problem of the first type of sealing is not strong, generally can properly increase the heat sealing temperature, and then reduce the heat sealing speed, while increasing the pressure of the cold pressure rubber wheel.