Automatic sealing machine hot melt adhesive particle usage tutorial: 6 steps from adding adhesive to discharging the box

The automatic sealing machine uses hot melt adhesive particles to seal the box, and the process can be summarized as six steps: cleaning and inspection → preheating with adhesive → setting temperature → adjusting the amount of adhesive sprayed → adjusting the sealing test → mass production. Novices can follow the instructions and get started in half an hour. The sealed box is flat, firm, and does not open.

Detailed explanation of operation steps

• The first step is to clean the pot and inspect itBefore starting up, check if there is any black residue or coking in the glue pot, if the filter is unobstructed, and clean the dirty pot before adding new glue;
• Step 2: Preheating with glueAdd rubber granules to two-thirds of the pot capacity to avoid overflowing glue when the pot is full; The first temperature rise takes about 20-30 minutes;
• Step 3: Set the TemperatureEVA adhesive particles for sealing are generally set at 150-170 ℃, and the recommended value indicated on Sunlife hot melt adhesive packaging should be taken as the middle;
• The fourth step is the amount of glue sprayedStarting from the small amount of glue, the width of the glue strip should be 2-3 millimeters, and the length should cover the overlapping area of the box cover. More glue does not necessarily mean it sticks firmly;
• Step 5: Trial Sealing AdjustmentContinuously test seal 5 boxes and check if they are fixed and if the box lid rebounds within 10 seconds after compression;
• Step 6: Batch ProductionCheck the condition of the glue line every 2 hours and lower the pot temperature to the insulation level before leaving work.

Three easily overlooked details

Firstly, if the cardboard box is damp, it will seriously lower the adhesive strength. Before sealing the box, confirm that the cardboard box is dry; Secondly, insufficient pressing time is the main cause of glue opening, and the pressing section of the conveyor belt should be guaranteed for at least 3-5 seconds; Thirdly, try not to mix different batches of rubber particles in the pot. Guangzhou Sunlife suggests using up the entire pot before adding new rubber to maintain the stability of the adhesive system.

Frequently Asked Questions

Q: What should I do if the nozzle is blocked?
First, raise the temperature by 10 ℃ to soften the residual glue, and then use the matching needle to clear it. Do not use iron wire to forcefully poke and damage the spray hole.

Q: How to deal with the increase in sealing and opening rate in winter?
If the glue cools too quickly in a low-temperature environment, the pot temperature can be raised by 5-10 ℃, or Sunlife winter low-temperature sealing glue particles can be used instead.

By following this process and performing daily cleaning and maintenance, the opening rate of the automatic sealing machine can remain stable within 1% for a long time.