Wrapping machine is a device used to wrap and seal products with packaging materials, widely used in industries such as food, medicine, and daily chemical. During operation, the wrapping machine may experience various common malfunctions. The following is a detailed introduction:

1、 Electrical system malfunction

The motor is not running

Reason: Power failure, motor winding open circuit or short circuit, motor control circuit fault, motor protection device action (such as thermal relay tripping), etc. For example, loose power plugs or damaged sockets can cause the power to not be connected; Long term overload operation of the motor may cause the winding to burn out.

Solution: Check the power connection to ensure that the plug is securely plugged in and the socket is functioning properly; Use a multimeter to check the resistance of the motor winding, determine if there is an open circuit or short circuit, and replace the motor if it is damaged; Check the motor control circuit and repair any open or short circuit points; Check protective devices such as thermal relays, reset or replace faulty devices.

Sensor malfunction

Reason: Sensor damage, improper installation position of sensor, faulty connection circuit between sensor and control system, sensor surface contamination, etc. For example, if the photoelectric sensor is blocked by dust, it will affect its detection of the product.

Solution: Use a multimeter to detect the output signal of the sensor and determine if it is working properly. If it is damaged, replace the sensor; Adjust the installation position of the sensor to ensure that it can accurately detect the product; Check the connection circuit between the sensor and the control system, and repair any open or short circuit points; Clean the dirt on the surface of the sensor.

Control system malfunction

Reason: PLC (Programmable Logic Controller) program error, touch screen malfunction, damaged control module, etc. For example, programming errors may cause the wrapping machine to fail to run according to the preset process.

Solution: Check the PLC program, find and correct errors; Calibrate or replace faulty touch screens; Detect the input and output signals of the control module, and replace the control module if damaged.

2、 Mechanical transmission system malfunction

Chain or belt slipping

Reason: Insufficient tension of the chain or belt, severe wear of the chain or belt, damage to the sprocket or pulley, etc. For example, the chain may elongate after prolonged use, resulting in insufficient tension and slipping.

Solution: Adjust the tensioning device of the chain or belt to increase the tension force; Check the wear of the chain or belt, and replace it if it is severely worn; Check the tooth profile of the sprocket or pulley for wear, and replace it if damaged.

Abnormal noise from transmission components

Reason: Bearing damage, poor gear meshing, loose coupling, etc. For example, a lack of oil or wear on bearings can cause abnormal noise during operation.

Solution: Disassemble the transmission components, check the operation of the bearings, and replace the bearings if damaged; Check the meshing clearance and tooth surface wear of the gears, adjust the meshing clearance or replace worn gears; Check if the connecting bolts of the coupling are loose, and tighten the bolts if they are loose.

The moving parts are stuck

Reason: Improper installation of mechanical components, foreign objects entering the mechanical structure, poor lubrication, etc. For example, debris on the guide rail can prevent moving parts from sliding properly.

Solution: Check the installation of mechanical components and readjust the installation position; Clean up foreign objects in the mechanical structure; Check the lubrication system, add or replace lubricating oil, and ensure that the moving parts are well lubricated.

3、 Packaging material transportation malfunction

Packaging material deviation

Reason: Improper installation of packaging material drums, non parallel conveyor rollers, malfunction of correction devices, etc. For example, if the centerline of the packaging material roll is not perpendicular to the conveying direction, it can cause the packaging material to deviate during the conveying process.

Solution: Adjust the installation position of the packaging material drum so that its centerline is perpendicular to the conveying direction; Adjust the parallelism of the conveyor rollers; Check the working condition of the correction device, repair or replace the faulty correction device.

Packaging material fracture

Reason: Poor quality of packaging materials, excessive conveying tension, sharp edges of conveying components scratching packaging materials, etc. For example, the strength of packaging materials is insufficient and they are prone to breakage during transportation.

Solution: Replace packaging materials with qualified ones; Adjust the conveying tension of packaging materials to be within an appropriate range; Check the conveying components, remove sharp edges or perform polishing treatment.

Packaging material blockage

Reason: The transportation channel for packaging materials is not smooth, the folding of packaging materials is incorrect, and the sealing device is malfunctioning, resulting in the inability of packaging materials to pass through normally. For example, the accumulation of debris in the conveying channel can cause blockage of packaging materials.

Solution: Clean the packaging material conveying channel to ensure smooth passage; Check the folding device of the packaging material, adjust the folding parameters to ensure that the packaging material is folded correctly; Check the sealing device, repair or replace faulty components.

4、 Sealing system malfunction

The seal is not secure enough

Reason: Inappropriate sealing temperature, insufficient sealing time, insufficient sealing pressure, mismatch between packaging materials and sealing components, etc. For example, the sealing temperature is too low to fully fuse the sealing area of the packaging material.

Solution: Adjust the sealing temperature to meet the requirements of the packaging material; Increase sealing time; Adjust the sealing pressure to meet the specified value; Select sealing components that match the packaging material.

There are wrinkles at the seal

Reason: Uneven tension of packaging materials during sealing, improper installation of sealing components, wrinkles in the packaging materials themselves, etc. For example, if the upper and lower heating plates of the sealing component are not parallel, it can cause uneven stress at the sealing area and result in wrinkles.

Solution: Adjust the conveying tension of the packaging material to make it uniform; Check the installation of the sealing components and readjust the installation position; Check the quality of the packaging materials and replace them if there are wrinkles.

Damaged sealing components

Reason: Long term use leads to wear and tear of sealing components, high sealing temperature causes deformation or damage of sealing components, improper operation causes impact on sealing components, etc. For example, if the sealed heating plate works at high temperatures for a long time, it may deform.

Solution: Regularly check the wear and tear of the sealing components, and replace them promptly if damaged; Adjust the sealing temperature to avoid excessive temperature; Standardize operation to prevent the sealing components from being impacted.