Troubleshooting of laminating machine

1、 The machine does not start: the input wire is not connected, the power line is connected reversely, and the voltage is insufficient.
2、 Inaccurate temperature measurement: whether the thermocouple and temperature controller are installed incorrectly or damaged.
Temperature Controller
Temperature Controller
3、 The working vacuum does not come up: the air circuit is blocked, the hand valve or solenoid valve is not closed, the vacuum pump motor belt is loose, and the vacuum gauge is damaged.
4、 The main power switch trips: the input wire on the top of the heating box leaks, the distribution box leaks, the external wire is laid on the equipment, and the motor leaks.
5、 Inadequate film absorption: insufficient vacuum, air leakage, insufficient temperature, too thin film, workpiece stuck to other materials, the concave depth of the workpiece exceeds the film lift, the absorption time is too short, the film does not lift, and the distance between the workpiece is too close.
6、 The surface of the covered workpiece has folds and is not smooth or the corners cannot be wrapped: the film is not straightened, the film quality is poor, the workpiece is not polished well, too much glue is sprayed, and the mold plate under the workpiece is too low. 7、 When it is not covered, the membrane will pull down: whether the solenoid valve or hand valve is open.
7、 Sporadic phenomenon: the temperature is too high, the heating time is too long, the film quality is poor, and there is no heating.
8、 Bad situation of table sticking
1. Improper selection of adhesive, improper setting of glue amount, and incorrect ratio measurement. The type and amount of adhesive shall be re-selected.
2. The diluent contains alcohol and water that consume NCO group, so that the hydroxyl of the main agent does not react. High purity ethyl acetate shall be used.
3. The surface of printed matter is sprayed with powder. Gently wipe off with a dry cloth.
4. The printing ink layer is too thick. The adhesive coating arrangement should be increased to increase the pressure
5. The printing ink layer is not dry or completely dry. It should be hot pressed once before gluing; Select adhesives with high solids content; Increase the adhesive coating thickness; Increase drying tunnel temperature, etc
6. The adhesive is absorbed by printing ink and paper, resulting in insufficient coating. Formulate and set the coating amount again.
7. The surface treatment of plastic film is insufficient or exceeds the applicable period, which makes the treatment surface invalid. The plastic film should be replaced.
8. Low pressure, fast speed, low temperature. The film covering temperature and pressure should be increased, and the vehicle speed should be appropriately reduced.
9、 Bubble occurs
1. The printing ink layer is not dry. It shall be hot pressed once and then glued; Delay the film covering time to allow it to dry thoroughly.
2. The printing ink layer is too thick. The amount of adhesive coating should be increased, and the pressure and composite temperature should be increased.
3. The drying temperature is too high, and the adhesive surface crusts. The drying temperature should be reduced
4. The surface temperature of the compound roller is too high. The temperature of compound roll shall be reduced.
5. The film is wrinkled or loose, uneven or crimped. The membrane should be replaced and the tension adjusted.
6. There are dust and impurities on the film surface. It should be cleared in time.
7. The adhesive coating is uneven and the amount is small. The coating amount and uniformity shall be improved. 8. The adhesive concentration is too high, the viscosity is large, and the coating is uneven. Use a diluent to reduce the adhesive concentration.
10、 Film-covered wrinkling
1. The film transfer roller is unbalanced. The transfer rod should be adjusted.
2. The tightness of both ends of the film is inconsistent or wavy. The qualified film shall be replaced.
3. The adhesive layer is too thick and the solvent evaporation is not complete, which affects the viscosity. The paper and film slide when squeezed by the pressure roller. The amount of glue applied should be adjusted to increase the temperature of drying channel.
4. The two ends of the electric heating roller and the rubber roller are unbalanced, the pressure is inconsistent, and the linear speed is different. The two rollers should be adjusted.