1.制作三封边复合袋的前提：使用上料架，通过一个气缸控制铁杆上下滑落，方便上料，卷筒用螺扣扣死。上料后用一低压宽袋捆膜。卷筒逆时针转动。
1. The premise of making three-edge compound bag: using the feeding rack, controlling the iron rod sliding up and down through a cylinder to facilitate feeding, and screwing the drum. After feeding, wrap the film with a low pressure wide bag. The drum rotates counterclockwise.
2.采用尾架胶辊，将两胶辊压紧，由一个小电机带动其转动，牵引薄膜。
2. The tailstock cots are used to compress the two cots, and a small motor drives them to rotate and pull the film.
3.收料胶辊，上下二根，轮流替换收料。
3. Receiving cots, two upper and two lower, take turns to replace the reclaiming.
4.制作三边封袋的中间过程，进行印刷步骤：印刷机前面二根上下铁辊，上放料，下收料。铁辊前有追踪机，直到跟踪料的左右摆动误差，控制印刷误差距离1mm内。
4. The intermediate process of making three-sided bags is to carry out printing steps: two upper and lower iron rollers in front of the printing press, feeding up and feeding down. There is a tracking machine in front of the iron roll until the swing error of the tracking material is left and right, and the printing error distance is controlled within 1 mm.
5.卷帘一般用凉席或塑料作成，主要起到一个压料，张力控制的作用。光标后有一个电感，侦测前方有无薄膜来控制尾架胶辊电机的运转和停止。有则停，无则动。
5. Roll curtain is usually made of mat or plastic, which mainly plays a role of pressing material and tension control. There is an inductance behind the cursor to detect whether there is a film in front to control the running and stopping of the tailstock cot motor. If there is a stop, no move.
6.暂停板：不锈钢制成，起到放平薄膜、防止袋子褶皱、保证袋子尺寸的功能，因此暂停板要平。薄膜上方可放轻的物品压平薄膜。
6. Suspension plate: made of stainless steel, which can flatten the film, prevent the folding of the bag and ensure the size of the bag. Therefore, the suspension plate should be flat. Light objects can be placed above the film to flatten the film.
7.光眼：通过跟足踪三边封包装袋的印刷颜色不段的变化来控制包装袋的长度，切割位置，以及色标的长度。光眼可通过调两端螺丝前后移动，光眼停位纠正（2-3mm）。可以在光眼正对着的薄膜下方垫张白纸增加它的灵敏性。如果图案复杂，也可以在图案上垫层白纸，保证光眼下方图案呈直线，前后无其它颜色，图案干扰。
7. Light Eye: The length, cutting position and color mark length of packaging bags are controlled by changing the printing color of the three-sided sealing bags with heel and foot traces. The eyesight can be corrected by adjusting both ends of the screw to move forward and backward, and the eyesight can be stopped (2-3mm). White paper can be placed under the film facing the eye to increase its sensitivity. If the pattern is complex, it can also be padded with white paper on the pattern to ensure that the pattern under the eye is straight line, no other color around, pattern interference.
光眼选位：①较平的直线。②图案前无其它图案干扰，否则影响光眼停位
Eye selection: 1. Flatter straight line. (2) There is no interference from other patterns before the pattern, otherwise it will affect eye stop.
8.三封边复合袋中重要的一步：封口
8. An important step in the three-edged composite bag: sealing
封刀呈三角形，两端各有一组滚轮，保证薄膜在封刀处平直运行。垫刀滚轮一般为耐热的硅胶滚轮。刀上和硅胶滚轮上都有一层耐热胶布。封刀两端有两个铜瓦，控封刀上下，控因此此处要经常加润滑油。
The sealing knife is triangular with a set of rollers at each end to ensure that the film runs smoothly at the sealing knife. The pad roller is generally a heat-resistant silicone rubber roller. There is a layer of heat-resistant adhesive tape on the knife and the silicone rubber roller. There are two copper bushes at both ends of the sealing knife, which controls the top and bottom of the sealing knife. Therefore, lubricating oil should be added frequently here.
9.换刀布：先用砂纸打磨封刀；将刀布贴在刀中间，朝两侧赶，避免刀布中间有气泡，褶皱，否则会导致虚封。
9. Change the knife cloth: first polish the sealing knife with sandpaper; stick the knife cloth in the middle of the knife and drive toward both sides to avoid air bubbles and folds in the middle of the knife cloth, otherwise it will lead to false seal.
10.如果三封边复合袋制作的前十步有误差的话可以采用调位杠：通过调节螺丝来控制铁杠的高低，进而调节薄膜切割的位置。
10. If there are errors in the first ten steps of making the three-edge compound bag, adjusting the position of the bar can be used: adjusting the screw to control the height of the bar, and then adjusting the position of the film cutting.
11.瓦楞胶辊：上有弹簧，避免静电导致膜缠滚轮上，有一专门电机控制其运转。封刀前和切刀后都有专门的除静电装置（一铁杆，上有一排铁针）。
11. Corrugated rubber rollers: There are springs on the rollers to avoid static electricity, and a special motor controls their operation. There are special electrostatic removal devices (an iron rod with a row of iron needles) before and after sealing and cutting knives.
12.三封边复合袋结尾是采用切刀进行切割
12. The end of the three-edged compound bag is cut with a cutting knife.
有上下两个切刀，下切刀固定，刀刃向上倾斜5°角左右，靠上切刀下落切割薄膜。切刀多为铸铁，刀两端加润滑油。可通调节上切刀固定螺丝来控制其和下切刀接触时的前后距离。
There are two upper and lower cutting knives. The lower cutting knife is fixed. The edge of the knife inclines upward about 5 degrees, and the film is cut down by the upper cutting knife. Most of the cutting knives are cast iron with lubricating oil at both ends of the knife. The fixed screw of the upper cutter can be adjusted to control the front and back distance of the upper cutter when it contacts the lower cutter.
13.折叠：折叠分三步，制袋机自动折叠。如果客户要求包装时字朝外，上卷时，卷筒是顺时针旋转的。如果字朝里，上卷时，卷筒是逆时针旋转的。
13. Folding: Folding is divided into three steps. Bag making machine folds automatically. If the customer requests packing with the word facing out, the drum rotates clockwise when rolled up. If the word is inward, when rolled up, the drum rotates counter-clockwise.
14.三边封包装袋在这个时候就可以进行包装了，可根据客户要求包装，用塑料袋或纸箱包装。
14. Trilaterally sealed bags can be packed at this time. They can be packed in plastic bags or cartons according to customer's requirements.