In using the packing machine, packaging machine sealing is a very important process,if the seal is not strict pollution caused the failure will lead to product packaging,so understanding sealing of packaging machine is very important. For different equipment of sealing in different ways, such as vacuum packing machine, shrink packing machine, sealing machine are sealed in different ways.
  With the plastic sealing for example, generally have high frequency ultrasonicsealing and heat sealing two kinds, there are also many sealing effect, such as single side sealing, sealing, sealing, on both sides of the multilateral pillow sealing, so that the kind of packing machine is various, such as overlay, body fitted type,winding type etc.
  The following to heat sealing as an example, to explain the sealing method: two contact surfaces heated plastics, so that it is in the shape of the melt, and then increase the pressure, the contact surface become stronger, become you can play the effect of packing, beautiful wait for a series of machine Like sealing machine, heat shrink packing machine,sealing and cutting machine is the principle. While the temperature is an important factor influencing the sealing effect, if the temperature is too high, easy to cause the contact surface deformation,affect the ppearance, if the temperature is too low, easy to cause the sealing laxproblem. Resistance heating method and pulse heating is the two most commonly usedmethod of heat sealing, and ultrasonic heating, high frequency current method. Each method are not the same, the resistance heating is a kind of sealing is the most widely used method, enterprise should according to the actual needs of the packaging to purchase in the selection of packaging machine.