How should an automatic quantitative packaging scale be maintained

The automatic quantitative packaging scale is a key device used for quantitative packaging of materials in industrial production. Its maintenance work is directly related to packaging accuracy, equipment lifespan and production efficiency. The following systematically expounds the key points of its maintenance from four aspects: daily maintenance, regular upkeep, fault detection and precautions:

I. Daily Maintenance

Cleaning and inspection

Material residue cleaning: After each operation, use a soft cloth or compressed air to clean the material adhering to the surface of the scale body, hopper, feeding device and weighing sensor to prevent the residue from caking or corroding the equipment.

Equipment appearance inspection: Check whether each component of the scale body (such as the hopper, bracket, sensor) is loose, deformed or damaged. Record and handle any problems found in a timely manner.

Lubrication and Fastening

Lubrication of transmission components: Regularly add lubricating oil to transmission components such as chains, gears, and bearings to reduce wear and extend service life.

Bolt tightening: Check whether the bolts at all connection points of the equipment are loose, especially at key parts such as the load cell and feeding device, to ensure the stable operation of the equipment.

Operation status monitoring

Weighing accuracy calibration: Before daily operation, an empty scale calibration must be conducted to ensure that the weighing accuracy meets the requirements. If the weighing error is found to exceed the allowable range, the machine must be stopped immediately for investigation.

Packaging speed and stability: Observe whether the packaging speed meets the set value, and whether there is any material leakage or unstable weighing during the packaging process. Adjust the parameters in time or clear the blockages.

Second, regular maintenance

Monthly maintenance

Calibration of load cells: Use standard weights to calibrate the load cells to ensure that the weighing accuracy is within ±0.1%.

Electrical system inspection: Check whether the wiring inside the control cabinet is loose and whether the electrical components such as relays and contactors are working properly to avoid equipment failure caused by poor contact.

Pneumatic system maintenance: If the equipment is equipped with pneumatic devices, it is necessary to check whether the air source pressure is stable and whether components such as cylinders and solenoid valves are leaking or stuck.

Quarterly maintenance

Mechanical component maintenance: Disassemble and inspect the feeding device, metering hopper, bag clamping device and other mechanical components, clean the accumulated materials inside, and replace worn seals or bearings.

Software system upgrade: If the equipment is equipped with a PLC or touch screen control system, the software version needs to be updated regularly to fix known vulnerabilities and optimize control logic.

Annual maintenance

Comprehensive performance testing: Entrust professional technicians to conduct a comprehensive performance test on the equipment, including weighing accuracy, packaging speed, stability and other indicators, to ensure that the equipment meets production requirements.

Replacement of vulnerable parts: According to the usage of the equipment, replace the load cells, belts, chains, sealing rings and other vulnerable parts to avoid malfunctions caused by component aging.

Iii. Troubleshooting

Abnormal weighing accuracy

Possible causes: Malfunction of the load cell, material adhesion, blockage of the feeding device, incorrect calibration parameters.

Solution

Check whether the connection lines of the load cell are loose or damaged. Replace the sensor if necessary.

Clear the residual materials in the hopper and feeding device to ensure smooth material flow.

Recalibrate the weighing to ensure that the calibration parameters match the material characteristics.

The packaging speed is unstable

Possible causes: Feeding device failure, electrical control failure, insufficient pressure in the pneumatic system.

Solution

Check whether the feeding motor, reducer and other components are working properly, and clear the blockage at the feeding port.

Check whether the PLC or touch screen control program is operating normally and fix logical errors.

Adjust the air source pressure to ensure the stable operation of the cylinder.

The device cannot be started.

Possible causes: Power failure, emergency stop button not reset, safety door not closed.

Solution

Check whether the power line is powered on and whether the fuse has blown.

Reset the emergency stop button to close all safety doors.

Check whether the relays and contactors inside the control cabinet are normally engaged.

Iv. Precautions

Operating Specifications

Operate strictly in accordance with the equipment operation manual to avoid overloading or illegal operation.

During the operation, it is strictly prohibited to adjust parameters or disassemble equipment components at will. It must be operated by professional technicians.

Environmental requirements

The equipment should be installed in a dry, well-ventilated environment free of corrosive gases to prevent damage caused by moisture or corrosion.

Keep the area around the equipment clean to prevent debris from entering the interior of the equipment and affecting its normal operation.

Spare parts management

Establish a spare parts inventory and stock up on commonly used consumable parts such as load cells, belts and chains to ensure that they can be replaced in a timely manner when faults occur.

Regularly inspect the quality of spare parts to prevent secondary failures caused by their aging.

Training and Records

Regular training should be provided to the operators to enhance their awareness and skill level in equipment maintenance.

Establish equipment maintenance files to record the time, content and results of each maintenance, upkeep and troubleshooting, facilitating subsequent analysis and improvement.