Valve bags are very popular in the domestic market, especially in the small commodity wholesale market and the food industry. Many people who make it do not know that this kind of bag is made by a special valve bag making machine. What is the working process of the valve pocket bag making machine, let’s learn more about it together!
The working flow of valve bag making machine
1. Hopper feeding
The bag making machine is a hopper on which the powder is transported to the packaging machine by the feeder throughout the day. Device Control. The sealing paper roll is driven by the guide roll to the lapel forming machine. After bending, it is lapped into a cylinder with a longitudinal sealer. The material of the bag making machine is automatically measured and then loaded into the bag. The transverse sealer intermittently pulls down the bag cylinder while cutting off the heat seal to form a flat bag with overlapping longitudinal seams on three sides, and seals the seal of the bag.
How to carry out the cutting of the bag making machine, the metal cutting process of the bag making machine is actually very similar to the metal extrusion process. When the gravure printing machine cuts plastic materials, the material begins to elastically deform under the action of the tool. As the tool continues to cut in, the stress and strain inside the metal continue to increase. When the stress reaches the yield point of the material, plastic deformation begins; Using computer control, the advanced (servo) fixed-length system makes the sealing and cutting size error small, and the electric eye is installed to make the printed pattern position. The length of the bag can be adjusted by computer numerical control. If there is a problem with the printing bag, the machine will automatically stop and give a warning sound.
3. Glue and heat sealing
After gluing, the bottom structure should be heat-sealed together. After gluing, the bag tube should be glued and then the bag tube should be formed, pulled, cut, and distributed. During the process, it is necessary to check whether the heat-sealing temperature of the product is appropriate (wrinkling of the bag when the temperature is overheated). , the temperature is too low, the package is not hot). Product specifications, thermal locations, thermal coupling wire specifications, and cutouts should also be checked frequently for compliance.
The above is the whole introduction of the working process of the valve bag making machine. The kraft paper valve bag is the preferred bag type popular in the world. The valve bag has the advantages of low cost, improved loading speed, high firmness, and improved stacking stability,realize automatic bag filling.