The influence of bag making machine on bag and its solution
Release time:
2020-10-23
There will be many problems in the process of using the three-side sealing bag making machine. In the process of using, we should learn to master the use method of the machine through these problems, so that the machine can be used for a longer time. At the same time, we believe that in the process of using, you must have encountered these problems.
There will be many problems in the process of using the three-side sealing bag making machine. In the process of using, we should learn to master the use method of the machine through these problems, so that the machine can be used for a longer time. At the same time, we believe that in the process of using, you must have encountered these problems.
1. Problem 1: Bag warping occurs in heat sealing of three-side sealing bag making machine
(1) The thickness of the composite film is inconsistent;
(2) The heat sealing temperature is too high or the heat sealing time is too long;
(3) In the longitudinal heat sealing knife part, the running track of the composite film is not straight;
(4) inadequate cooling;
(5) the curing time is not enough;
(6) The heat resistance of the surface substrate film is poor;
(7) In the composite process, the tension of the composite substrate is improperly controlled, resulting in residual stress after curing, especially when the thickness of the composite film is thinner.
Countermeasures taken:
(1) Adjust the tension of the floating roller;
(2) select the inner sealing base material with low temperature heat sealing property;
(3) Adjust the heat sealing temperature to a suitable temperature;
(4) adequate cooling;
(5) full curing;
(6) Re-select the surface substrate film;
(7) Adjust the tension of each part of the composite processing equipment to make the retraction rate of the two composite substrates equal as much as possible.
2. Question 2: The most common problem in the process of making three-sided bags is the brittle and brittle sealing of the bag making machine. This situation is particularly distressing. The bag cannot be used normally and will cause waste of resources. The following reasons are summarized.
(1) The heat sealing temperature is too high;
(2) Excessive pressure;
(3) heat sealing time is too long;
(4) The edge of the upper sealer of the bag making machine is too sharp;
(5) The silicone rubber sealed at the bottom of the bag making machine is too hard;
(6) In the process of compounding and curing, a part of the adhesive penetrates into the film, and the substrate is affected by the penetration of the adhesive, the toughness (impact resistance) decreases and the brittleness increases;
(7) plastic composite packaging bags in the cooling and placement, the heat seal strength has increased, but also has a tendency to become brittle.
Countermeasures taken:
(1) According to the heat sealing characteristics of the material of the inner sealing layer, select the appropriate processing temperature, pressure and heat sealing time;
(2) Improve the surface state of the upper heat sealing knife of the bag making machine to make the surface of the sealer flat;
(3) choose the appropriate hardness of silicone rubber pad.
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