During nitrile glove production line operation, various malfunctions may occur due to multiple factors. Below are common fault scenarios and their corresponding solutions.
1. Frequent Machine Shutdowns
When the conveyor belt stops moving: First check if the power switch is loose, If the power switch is normal, check the error code on the control panel and refer to the manual to identify the faulty module.
Solutions:
(1) Open the control cabinet and inspect relay contacts for oxidation/blackening. Gently polish contact surfaces with fine sandpaper.
(2) Voltage instability may damage circuit boards. Install a dedicated voltage stabilizer in the workshop.
(3) Sensor dust accumulation causes false alarms. Clean infrared sensor probes weekly with alcohol-dipped cotton swabs, avoiding liquid penetration into internal components.
2. Irregular Glove Formation with Rough Edges
Potential causes:
(1) Abnormal mold temperature: Use infrared thermometer to check actual temperatures of upper/lower molds. Adjust temperature control parameters if difference exceeds 3°C.
(2) Slight deformation of glove former: Measure flatness with vernier caliper. Return to factory for repair if deformation exceeds 0.5mm.
(3) Poor latex fluidity: Preheat raw material tank and control discharge pressure.
3. Material Jamming in Edge-Curling Machine
Immediately stop machine and remove trapped materials. Then analyze specific causes:
(1) Abnormal noise from synchronizing gears: Open gearbox to check lubricant condition. Replace grease if blackened/degraded (every 200 operating hours).
(2) Adjust curling roller gap to 0.1mm smaller than glove thickness. Too tight may puncture gloves; too loose causes weak seams.
(3) Lubricate conveyor chain with specialized lubricant every 15 days. Allow 3 minutes of idle operation after lubrication for proper penetration.
4. Sudden Shutdowns
When sudden shutdown occurs and restart fails: Immediately cut main power supply.
Troubleshooting:
(1) If PLC module fault indicator remains lit, attempt factory reset.
(2) Check for phase loss in three-phase power. Use multimeter to verify each phase voltage remains at 380V±5%.
(3) Conduct monthly emergency stop button tests to ensure instant power cutoff capability.
Equipment Maintenance Guidelines (Fengwang Recommendations):
(1) Establish replacement schedule for vulnerable components.
(2) Create monitoring curves for temperature, pressure and rotation speed. Set alerts for fluctuations exceeding 10%.
(3) If you encounter a problem that you can’t solve, don’t worry too much. Take a video of the faulty part and contact the technical support of the manufacturer. Describe clearly the operation steps before and after the failure, the cumulative operating time of the equipment, and which parts have been replaced recently. Keep good maintenance records and parts replacement lists. These are important documents for applying for warranty services.
(4) Establish a regular maintenance system. The operator wiped the oil stains on the machine surface every month, checked the airline sealing and calibrated the sensor accuracy.
(5) When purchasing accessories, be careful and make sure to check the authenticity by identifying the original factory code. Establish a quality file for accessories, record the service life and failure conditions of each part, and gradually replace suppliers with high failure rates.
(6) When producing gloves made of special materials, attention should be paid to parameter adjustment. When encountering the trial production of a new product, conduct a small-scale test first, record the optimal parameter combination and store it in the database.
(7) Fluidity tests should be conducted on raw materials of different batches, and the injection time should be slightly adjusted according to the viscosity value.
(8) Equipment renovation should be carried out with caution. When installing automatic detection devices, the impact on the original system should be evaluated. A guardrail must isolate the mechanical hand grasping position, and a visual recognition system should be installed with a dust cover. Any modification should retain the original design drawings. Mark the modified parts in red on the circuit diagram to facilitate the traceability of faults in the later stage.
(9) For faults in the hydraulic system, first check the oil circuit and then the electrical circuit. For abnormal temperature, first check the sensor and then the heating tube. First, disconnect the auxiliary system to test if the host is functioning properly, and then connect each module one by one for observation.
(10) During the peak production season, more attention should be paid to preventive maintenance, and bearings and belts that are about to expire should be replaced in advance.
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