Heat sealing problem of blister packaging machine and its solution

Heat sealing problem of blister packaging machine and its solution

Generally speaking, there are three problems in heat sealing of blister packaging machine: weak bonding, uneven net grain, and aluminum foil being pressed through:

1. Reasons for weak bonding: the glue on the surface of the aluminum foil is too low to reach the melting point, the aluminum foil is of poor quality or the glue is not evenly applied;

Solution: Turn up the temperature so that the temperature remains constant at about 160° (the exact temperature is related to machine speed and room temperature), replace the aluminum foil and try again;

2. Reticulate uneven reasons: checker rust or dirt, heat sealing temperature is too low, checkered plate in accordance with the lower die, the forming temperature is too low, pull when blister forming thin thickness between the bubble and bubble, pressure is insufficient, the lower die is not parallel, heat sealing cylinder pillar rising height is insufficient, heat sealing mode to the highest point on the die (checkered plate) must be about 3 mm push upward;

Solution: use wire brush to clean up or use the steel saw blade sharpened, adjustable heat sealing temperature, with oil stone partial grinding lower die plane (red lead or user besmear next mold surface with checkered plate after moving, will wear off contact point), raise the forming temperature, the heat sealing cylinder pressure is not greater than 0.5 Mpa, in parallel, loosen the post four round head nut, downward adjustment, boosting up to no more than 5 mm, the four corners to be parallel.

3. Reason for aluminum foil being pressed through: The heat sealing temperature is too high and the heat sealing pressure is too high;

Solution: reduce the heat sealing temperature, reduce the heat sealing pressure.