In the process of using the laminating machine, occasionally there will be some failures, the following to see how to eliminate some common failures.
First, the machine does not start: the input wire is blocked, the power line is reversed, and the voltage is not enough.
Second, the temperature measurement is not accurate: thermocouple, temperature controller. Whether the installation is incorrect or damaged.
Third, the working vacuum degree does not come: the gas path is blocked, the hand valve or the solenoid valve is not closed, the vacuum pump motor belt is loose, and the vacuum gauge is damaged.
Four, the main power switch trip: heating box top input wire leakage, distribution box leakage, external wires on the equipment, motor leakage, etc.
Fifth, the suction film is not in place: the vacuum is not enough, air leakage, temperature is not enough, the film is too thin, the workpiece is pasted on other materials, the concave depth of the workpiece exceeds the pull up of the film, and the suction time
Six, the surface of the covered workpiece is folded and not smooth or corner encapsulation: the film is not straightened, the film quality is not good, the workpiece is not polished, the glue is sprayed too much, and the workpiece is below
The touch plate is too low.
Seven, play broken phenomenon: the temperature is too high, the heating time is too long, the film quality is not good, there is no heating.
Eight, the sticky table is not good:
1. Improper selection of adhesive, improper setting of glue amount, and incorrect measurement of ratio. The type and dosage of adhesive should be re-selected.
2. The diluent contains alcohol and water that consume NCO, so that the hydroxyl group of the main agent does not react. High purity ethyl acetate should be used.
3. Powder is sprayed on the surface of printed matter. Gently wipe off with a dry cloth.
4. Print ink layer is too thick. The adhesive coating arrangement should be increased to increase the pressure.
5. Print ink layer is not dry or not completely dry. Should be hot pressed once before gluing; Select adhesives with high solid content; Increase the adhesive coating thickness; Increase drying channel temperature, etc.
6. Adhesive is absorbed by printing ink and paper, so that the coating amount is insufficient. Reformulation and coating amount should be set.
7. The surface treatment of plastic film is not enough or exceeds the applicable period, so that the treatment surface fails. The plastic film should be replaced.
8. Low pressure, fast speed and low temperature. The film temperature and pressure should be increased, and the speed should be reduced appropriately.
Nine, foaming phenomenon
1. Printing ink layer is not dry. Should be hot pressed again before gluing; Delay the coating time to dry thoroughly.
2. The printing ink layer is too thick. The amount of adhesive coating should be increased, and the pressure and compound temperature should be increased.
3. If the drying temperature is too high and the adhesive surface is crusted, the drying temperature should be reduced.
4. The surface temperature of the composite roll is too high. The temperature of the composite roll should be reduced.
5. The film is wrinkled or relaxed, and the film is uneven or curled. The film should be replaced and the tension adjusted.
6. There are dust impurities on the surface of the film. Should be removed in time.
7. The adhesive coating is uneven and the dosage is small. The amount and uniformity of coating should be increased.
8. The adhesive concentration is too high, the viscosity is large, and the coating is not uniform. Apply diluent to reduce adhesive concentration.
Ten, the film wrinkled
1. The film transfer roller is not balanced. The transfer stick should be adjusted.
2. The tightness of both ends of the film is inconsistent or wavy. Suitable film should be replaced.
3. The adhesive layer is too thick, the solvent evaporation is not complete, which affects the viscosity, and the pressure roller extrusion causes sliding between the paper and the film. The amount of glue should be adjusted to increase the temperature of the drying passage.
4. The electric heating roller and the rubber roller are unbalanced at both ends, the pressure is inconsistent, and the linear speed is not equal. Both rollers should be adjusted.
At present, the main problem of laminating film
Surface foaming, creasing, bending uneven, falling off separation, not easy storage, etc., these quality problems have not been solved for many years, and the reasons are many, such as:
1. The impact of different types of paper.
2. The influence of different ink colors.
3. Different effects of climate.
4. Influence of environment and conditions.
5. The impact of the lack of scientific management.
6. Influence of personnel quality.
Film coating equipment should have several major functions:
1. With non-stop paper refill device to ensure continuous production.
2. The use of large diameter pressing roller, effectively improve the production speed, to ensure that the composite products smooth and bright.
3. The powder removal mechanism combined with sweeping powder and pressing powder is adopted to ensure the powder removal effect. (Equipped with powder removal device)
4. Advanced drying channel structure ensures that the glue on the film can be dried quickly.
5. Adjustable disk rotary cutter to ensure the paper cutting.
6. Motor adopts frequency conversion control, safe and reliable.
