Common faults of laminators

Common faults of laminators

1. The equipment does not start: the power line is open circuit, the power line is reversely connected, and the voltage is not enough (normally about 380V);

2. Inaccurate temperature measurement: caused by thermal inertia, wait for a few minutes for the temperature to become normal or whether the thermocouple and temperature controller are installed incorrectly and damaged;

3. Negative pressure does not come up: leaking wire hose, stuck valve of solenoid valve, blockage of vacuum pump filter element or loose motor belt, oxidation or damage of upper and lower pointer contacts of vacuum gauge; 4. Main power switch trip: terminal on top of heating box Grounding, power distribution box leakage, external wires on the chassis, motor leakage, etc.;

Fifth, the suction film is not in place: insufficient pressure, air leakage, insufficient temperature, film too thin, the depth of the workpiece exceeds the pull-up of the film, the suction time is too short, and the workpiece is too thick (plus the thickness of the backing plate is generally not more than 40mm) , The workpiece is too close to the workpiece (generally 2 to 3 times the thickness of the workpiece);

6. The surface of the coated workpiece is wrinkled or not smooth or the corners cannot be covered: the film is not straightened, the quality of the film is not good, the workpiece is not polished well, the glue is sprayed too much, and the backing plate under the workpiece is too low;

7. The film is pulled down and raised before the suction cover: the solenoid valve is stuck;

8. The phenomenon of membrane damage: small holes, too high temperature or too long heating time, poor quality of membrane; large holes or cracking in one piece, insufficient temperature or heating time