shrink machine is highly favored market in recent years, is one of the main packaging equipment and packaging machinery industry, the use of heat shrink packaging machine is due to thermal contraction machine with automatic film, tape, packaging, product packaging firmly, elegant appearance, also have moistureproof dustproof effect, with the wide the use of heat shrink machine, shrink machine fault is occurred customers also have mixed feelings. Heat shrink packaging machine packaging process mainly include: contraction effect is not good, shrink packaging film cracks, holes, sealing and cutting machine (bag making machine, film machine, sealing and cutting effect is not good).
  In this paper, sealing and cutting machine (bag making machine, film machine) sealing effect is not good, sealing and cutting is not uniform, the main reason also has a relationship with the air pressure, the proper air pressure has a significant effect on the bag sealing and cutting, if air pressure is too low and cause the sealing and cutting machine cutting knife can not be qualified for heating the thermal shrink film, cut off... .. And of course the cutting temperature is generally great relationship under fixed temperature, temperature of the cutter case cutting bag making of shrinking machine good pressure has a very good role.