Paper bag machines often have some problems, we need to understand the reasons for these problems. If there is an error in the length of the cut bag, we need to lock the rubber roller, and then check whether the film is clamped in the rubber roller. Secondly, we need to observe whether the feeding speed is too high. If it is too high, we need to reduce the feeding speed in time.
There are errors in the length of the cut bag, long and short ① First, "lock the shaft" on the feeding rubber roller, and pull the film hard to see if it is not clamped in the feeding rubber roller. If it is not clamped, properly adjust the pressure of the feeding roller until the film It can't be pulled. ② Whether the "feeding speed" is too high, appropriately reduce the "feeding speed". ③ Whether the clamping device of the back bread red cloth is clamped too tightly, adjust it appropriately. If it cannot be clamped too tightly, it is better to pull the film gently. ④ Try to loosen or tighten the aluminum gantry tube.
2. The length of the cut out bag is the same, but it is not satisfied with the set value
① Press "2" to enter the password in the computer standby state, enter the actual length for correction
3. The bag is not sealed tightly or one side is not strong
① Whether the temperature is set properly: LDPE material is above 280°, BOPP material is above 320°
② Adjust the position of the heat sealing knife
③ Check whether the conveyor belt is pulling the material too early, and the upper conveyor belt should be closed just after the heat sealing knife leaves the silicone roller 20mm-25mm high.
④Check the transmission bearing of the upper conveyor belt
4. The bag sometimes cuts continuously
① The hot knife is not smooth. Stuttering is the main reason for the continuous bag cutting. Because the hot knife will expand with high temperature, the hot knife can only lock one screw but not both ends, otherwise it will cause the hot knife to freeze or run unsmoothly
② Pay attention when adjusting the heat-sealing knife. When locking the heat-sealing knife, you must move closer to the side with the locking screw to ensure that there is room for extension on the other end of the heat-sealing knife, otherwise it will cause the heat-sealing knife to jam or fail to operate. Smooth, causing the bag to cut constantly
③ The upper conveyor belt pulls the material too lightly, adjust it down appropriately
5. The bag is not tidy when exiting the conveyor belt, and the material is received in disorder
① Check whether one side is high or low when the upper and lower conveyor belts are closed. The mismatch between the upper and lower conveyor belts is one of the main reasons for the disordered and untidy collection.
② Adjust the up and down distance of the apron, and whether the apron is evenly spaced
3. Equipment maintenance
1. The equipment should always clean up the debris in the electric box, and the four corners of the equipment should be blown clean with air guns to keep the whole machine clean
2. Hot cutter slider and hot cutter bar. Lubricating oil should be added regularly to the water jet slider, punching machine, and transmission chain, generally 1-2 times every 10 hours
3. The equipment must be grounded strictly to prevent leakage and injury. The wiring of the heating blade of the hot cutter must be checked for looseness. If there is looseness, it must be tightened in time to prevent leakage or even fire.

The kraft paper made by our common kraft paper bag machine is generally yellowish brown, and it is often used to make bags and wrapping paper. There are many types of kraft paper on the market. According to the nature and use of kraft paper, we can often classify it. According to different classifications, it will be easier for us to find the kraft paper we need.
1. Kraft paper usually keeps its yellowish-brown color, suitable for bags and wrapping paper. Depending on its properties and uses, kraft paper has various uses. Kraft paper is a collective name for a kind of paper, and there is no certain specification, and it is generally classified according to its nature and use.
2. According to the different colors, it can be divided into: primary color kraft paper, red pine kraft paper, white kraft paper, flat kraft paper, single-gloss kraft paper, and two-color kraft paper.
3. According to different purposes, it can be divided into: packaging kraft paper, waterproof kraft paper, moisture-proof kraft paper, anti-rust kraft paper, pattern-making kraft paper, process kraft paper, insulation kraft paper, and kraft stickers.
4. According to different materials, it can be divided into: recycled kraft paper, kraft core paper, kraft base paper, rough kraft paper, kraft wax paper, wood pulp kraft paper, composite kraft paper. Kraft paper color reasons
Different sources of kraft paper raw materials, different production batches, different production seasons, different production machines, etc. Many reasons will affect the color of the kraft paper roll base paper. This difference in color is difficult to avoid, and it is also Uncontrollable, generally the same batch of kraft paper can guarantee 98% consistent color. Kraft paper applications and uses
1. Kraft paper is used in various industries such as chemical industry and machinery, especially widely used in food packaging industry. Kraft paper is widely used in various packaging supplies, such as paper bags, handbag kraft paper, color boxes, paper cups, gift box kraft paper, printing kraft paper, notebook kraft paper, workbook kraft paper, and special kraft paper for envelopes.
2. Food packaging should follow the principle of convenience and convenience. The tensile strength of kraft paper makes it very suitable for packaging needs. In order to prevent the bag from being pulled off when consumers carry out food, the packaging material is required to have good tensile strength. Beverage packaging requires that the material has a certain resistance to moisture and deformation to prevent deformation and damage due to water absorption.
3. As shown in the picture, we have packed 2 books in a handbag, 2 books are 2kg, the bearing capacity is still OK, the bottom is not broken, and the handle is not broken. The glue we use to make paper bags
It consists of two parts: base material and adhesive. The adhesive material is mainly hot melt adhesive, pressure sensitive adhesive, acrylic adhesive, synthetic rubber, natural rubber, etc. The base materials include polypropylene film, polyvinyl chloride film, fiber cloth, fiber plastic, sponge, foam, tissue paper and other materials. But the glue used in our craft is hot melt glue, which belongs to glue used for food grade paper bags.

The computer controller of the paper bag machine often has some failures. In order to solve these failures, we need to know the type of failure and the solution. If you can't start by pressing the start button, you need to turn off the power and restart, and then check whether the inverter alarms. Also need to check whether the intermediate relay is working properly, if not, replace it.
③ Check whether the voltages of U, V, W, and 380V are normal. If they are normal, replace the motor.
2. The computer screen does not display or the keys fail:
① First check whether the switching power supply has DV 24V voltage output. Or the proximity switch is damaged and disconnected, causing the power indicator to not light, and there is no 24V output.
② Replace the proximity switch or switching power supply.
③ Replace the computer.
3. The machine can be started, but the feeding rubber roller does not rotate or feed:
① Check whether the servo drive has alarms. If there is no alarm, replace the servo drive.
② Check whether the proximity switch is burnt out. If it burns out, replace the proximity switch.
③ Replace the servo motor.
4. The machine starts to work, but the feeding rubber roller is feeding slowly or feeding for a long time:
① Mainly check whether the current value of the "pulse equivalent" parameter in the computer "modification" is "0.107".
5. The rear discharge DC motor or conveyor belt motor does not rotate or work:
① Check whether the over-current indicator on the upper left corner of the DC motor speed control board is on. If the over-current indicator is on, turn off the main power supply for 5 seconds and then power on. If the over-current indicator is still on, please replace the DC motor speed control board.
② Check whether the speed regulating potentiometer is out of order, if it fails, replace the potentiometer.
③ Check whether the carbon brushes of the DC motor are excessively worn. If they are excessively worn, replace the carbon brushes.
6. The punching machine does not punch or penetrate the material:
① First check the parameter settings in the computer: whether the current value of "punching delay" is "50-80" milliseconds, whether the current value of "punching delay" is "30" milliseconds, and whether the current value of "function 17 port" is "1 punching" "
② Check whether the punching machine is worn
③ Check whether the air pressure is above 0.6MPA
④ Check whether the perforated intermediate relay works normally (replace)
⑤ Check whether the solenoid valve is damaged (replace)