Full palm analysis! Really analyzed super detailed!
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The palm is a process in which the glue is evenly applied to the palm surface by a palm-up machine, and then the sheet-like single-layer film is synthesized into a cylindrical tube. The machine used for the palm is a palm-handling machine with a speed of 200~250m/min, with automatic tension control to ensure that the film roll is flat and the end faces are neat. Here are a few questions to keep in mind.
1. Carry out the first inspection to confirm whether the glue is uniform, whether there are bubbles or not, and whether the diameter is consistent with the process order.
2. Whether the position of the palm is consistent with the process sheet.
3. Whether the direction of the palm is correct, the direction of the palm is divided into left and right and left and left, depending on the direction of the cutting of the cutter on the sleeve labeling machine.
4. Is the crease position correct?
5. The shape of the plate is generally the width of the steel plate minus 3mm, pay attention to the film roll.
6. The glue flow should be controlled well, not too large, to prevent excessive corrosion and adhesion.
7. The balance of the palm is generally controlled at about 0.5mm to prevent the glue from overflowing and causing adhesion.
8. The palm glue should be sealed during the production process. One is to ensure that the ratio is unchanged, and the other is to maintain environmental sanitation, because the glue contains a lot of solvents harmful to the human body.
9. Before the palm is wound up, the glue must be dry, otherwise it will stick.
10. The tension of the palm of the hand should not be too large, which may cause adhesion.
11. Timing inspection of the diameter.
12. The general formula (mass ratio) of the glue.
Cyclohexanone: 3.5
Butanone: 1.5
Ethyl ester: 0.4
Isopropyl alcohol: 0.2
The above formula can also be used to hold the OPS film. If the PET film is combined, simply add an appropriate amount of PVC powder to the above solution and mix well.
The glue should be adjusted according to the weather. A punching machine can be installed on the palm machine to meet the special requirements of the customer. The palm-folding diameter should be adjusted according to the temperature difference, which is roughly as follows: 0.2% above 25°C and 0.4% above 35°C.