How to use three-sided sealing bag-making machine

There are many problems in the use of three-sided bag-making machine. You should learn how to use the machine through these questions, so that the machine can be used for a longer time. At the same time, we believe that you must have encountered these problems during the use. What are you hesitating about? Come to official website and learn about these thorny issues with us.

1. Problem 1: Warping of bags during heat sealing of three-sided sealing bag-making machine, causes and solutions;

Heat sealing reason:

The thickness of (1) composite membrane 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) insufficient cooling;

(5) insufficient curing time;

(6) The surface base film has poor heat resistance;

(7) Improper tension matching control of composite substrate in the composite process leads to residual stress after curing and setting, especially when the composite film is thin.

Countermeasures taken:

(1) Adjust the tension of the floating roller;

(2) selecting an inner sealing substrate with low-temperature heat sealing performance;

(3) adjusting the heat sealing temperature to a proper temperature;

(4) fully cooling;

(5) fully curing;

(6) reselecting the surface basement membrane;

(7) Adjust the tension of each part of the composite processing equipment to make the shrinkage of two composite substrates equal as far as possible.

2. In the process of making three-sided bags, the most common problem is that the sealing of the bag-making machine is fragile, which is particularly distressing. Not only can the bag not be used normally, but it will also waste resources. Let's look at the reasons and solutions!

Reason:

(1) The heat sealing temperature is too high;

(2) excessive pressure;

(3) The heat sealing time is too long;

(4) The edge of the sealing machine on the bag-making machine is too sharp or the coated PTFE is damaged;

(5) The silicone rubber sealed at the bottom of the bag-making machine is too hard;

(6) During the composite curing process, a part of the adhesive permeates into the film. Due to the penetration of adhesive, the toughness (impact resistance) of the substrate decreases and the brittleness increases;

(7) After cooling, the heat sealing strength of the plastic composite packaging bag is improved and tends to be brittle.

Countermeasures:

(1) Select appropriate processing temperature, pressure and heat sealing time according to the heat sealing characteristics of the inner sealing layer material;

(2) improve the surface state of the heat sealing knife at the upper part of the bag-making machine to make the surface of the sealing machine smooth;

(3) completely covering PTFE cloth;

(4) Select a silicone rubber pad with appropriate hardness.