Home / News / Three sided sealing bag making machine takes only 14 steps to make three sided sealing bags

Three sided sealing bag making machine takes only 14 steps to make three sided sealing bags

Views: 0     Author: Site Editor     Publish Time: 2023-05-04      Origin: Site


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The three sided sealing bag making machine adopts PLC microcomputer control, dual servo dual frequency conversion speed regulation, photoelectric monitoring and correction, pneumatic transmission and other technologies. It integrates mechanical and electrical functions, adopts a fully automatic unwinding, cutting, and tension adjustment control system, a five row bridge type longitudinal sealing hot knife heat sealing and circulating water cooling bonding device, and heating temperature Pc control. Various auxiliary bag making devices can be added as needed.

The entire machine has the characteristics of high automation, good product quality, and strong universality.

Used for producing various plastic, paper plastic composite materials, it is an ideal bag making equipment for various middle sealing bags and three side sealing.

1. The premise for making a three sided sealing bag is to use a feeding rack, which controls the iron rod to slide up and down through a cylinder, making it convenient for feeding. The drum is fastened with a screw. After loading, use a low-pressure wide bag to bundle the film. The drum rotates counterclockwise.

2. Using tailstock rubber rollers, press the two rubber rollers tightly, and a small motor drives them to rotate and pull the film.

3. Receiving rubber rollers, two at the top and two at the bottom, take turns replacing the receiving material.

4. The intermediate process of making a three sided sealing bag involves printing steps: two upper and lower iron rollers in front of the printing machine, upper feeding, and lower receiving. There is a tracking machine in front of the iron roller to track the left and right swing error of the material, and control the printing error distance within 1mm.

5. Rolling curtains are generally made of cold mats or plastic, mainly used for pressing and tension control. There is an inductor behind the cursor that detects whether there is a thin film in front to control the operation and stop of the tailstock rubber roller motor. If there is, stop; if there is no, move.

6. Pause board: Made of stainless steel, it has the function of leveling the film, preventing bag wrinkles, and ensuring bag size. Therefore, the pause board should be flat. Light objects can be placed above the film to flatten it.

7. Light Eye: Control the length of the bag, cutting position, and color code length by following the changes in the printing color of the three sided sealed bag. The light eye can be corrected by adjusting the screws at both ends to move back and forth, and the light eye stops (2-3mm). You can place a piece of white paper under the film facing the light eye to increase its sensitivity. If the pattern is complex, white paper can also be placed on top of the pattern to ensure that the pattern below the light eye is straight and there are no other colors before or after, and the pattern interference.

Optical eye positioning:

① A flatter straight line. ② There is no other pattern interference in front of the pattern, otherwise it will affect the stopping position of the light eye.

8. The most important step in sealing bags on three sides: sealing

The sealing knife is triangular in shape, with a set of rollers at both ends to ensure that the film runs smoothly at the sealing knife. The pad roller is generally a heat-resistant silicone roller. There is a layer of heat-resistant tape on both the knife and the silicone roller. There are two copper tiles at both ends of the sealing knife, which control the upper and lower parts of the sealing knife. Therefore, lubricating oil should be added frequently here.

9. Change the knife cloth: First, polish the sealing knife with sandpaper; Stick the knife cloth in the middle of the knife and drive it towards both sides to avoid bubbles and wrinkles in the middle of the knife cloth, otherwise it may cause virtual sealing.

10. If there is an error in the first ten steps of making a three sided sealing bag, a positioning rod can be used: the height of the iron rod can be controlled by adjusting the screws, and then the position of the film cutting can be adjusted.

11. Corrugated rubber roller: There is a spring on it to avoid static electricity causing the film to wrap around the roller, and there is a special motor to control its operation. There are specialized anti-static devices (an iron rod with a row of iron needles) before and after sealing the knife.

12. The final step of sealing the bag on three sides is to use a cutting knife for cutting: there are two upper and lower cutting knives, the lower cutting knife is fixed, the blade is tilted upwards by about 5 °, and the film is cut by falling against the upper cutting knife. The cutting knives are mostly cast iron, with lubricating oil added to both ends of the knives. The distance between the upper cutter and the lower cutter can be controlled by adjusting the fixing screw of the upper cutter.

13. Folding: Folding is divided into three steps, and the bag making machine automatically folds. If the customer requests that the packaging should face outward and the reel should rotate clockwise when winding. If the words face inward, the reel rotates counterclockwise when winding up.

14.At this point, the three sided sealing bag can be packaged according to customer requirements, using plastic bags or cardboard boxes for packaging

It has 15+ years’ experience specialized in R&D and manufacture of high speed bag making machines.
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