Powder packaging capping machines are widely used in industries such as pharmaceuticals, food, and chemicals, but various problems may arise during operation, affecting production efficiency and product quality. The following are several common problems and their solutions, analyzed in combination with practical scenarios:

1. Inaccurate packaging quantity

‌Problem manifestation:The amount of powder filling is too much or too little, exceeding the error range.

‌Possible reasons:

• Wear or blockage of measuring devices (such as screws, measuring cups);

Poor material fluidity (such as moisture absorption and agglomeration);

Equipment vibration causes powder to loosen or accumulate;

• Sensor or control system malfunction.

Solution:

Cleaning and Calibration: Regularly disassemble and clean measuring components, calibrate loading parameters (such as screw speed and filling depth);

• Improve material condition: Add desiccants or vibrating screens to ensure that the powder is dry and uniform;

Strengthening equipment: Check the fixing bolts of the equipment and install shock-absorbing pads;

Check the sensor: Clean the photoelectric sensor or pressure sensor and replace it if necessary.

Scenario example:

During the production of a certain pharmaceutical factory, fluctuations in loading volume were discovered. Upon inspection, it was found that the materials had formed small pieces due to high humidity, resulting in uneven screw filling. The solution is to perform secondary drying on the materials and install dehumidification devices.

2. The screw cap is not tight or the cap falls off

‌Problem manifestation:The bottle cap is not tightened, the sealing is insufficient, and it is easy to fall off during transportation.

‌Possible reasons:

The position of the capping head is offset or the pressure is insufficient;

The size of the bottle cap does not match the size of the bottle mouth;

The torque parameter setting for the screw cap is incorrect;

The drive belt is loose or worn.

Solution:

Adjust the screw cap head: realign the screw cap head position and increase the downward pressure;

Check specification matching: Confirm that the tolerance between the bottle cap and the bottle mouth meets the design requirements;

Calibration torque: Adjust the torque value of the capping machine through a torque tester;

Replace the belt: Check the transmission components and replace the aging belt in a timely manner.

Scenario example:

After a food factory replaced the bottle cap from a new supplier, a leak occurred. Testing revealed that the inner diameter of the bottle cap was too small, which conflicted with the original parameters of the equipment. Adjust the screw cap pressure and replace the qualified bottle cap to solve the problem.

3. Material jamming or blockage

‌Problem manifestation:Powder accumulates in the hopper or discharge port, making it difficult to dispense smoothly.

Possible reasons:

Strong adhesion of materials (such as those containing sugar or oil components);

• Unreasonable hopper design (such as excessively small corners);

The pneumatic system has insufficient air pressure to drive the flow of powder.

Solution:

• Improve hopper design: increase hopper tilt angle or inner wall coating (such as PTFE);

Add flow aid device: Install a vibrator or air hammer to assist in powder flow;

Check the air source: Ensure stable air pressure in the pneumatic system and clean the trachea.

Scenario example:

Due to slight clumping and frequent jamming of materials in a certain milk powder packaging line, the powder flowability was significantly improved after installing an ultrasonic vibrator.

4. Foreign objects mixed in

‌Problem manifestation:Foreign objects such as metal shavings and plastic fragments were found in the packaged finished product.

Possible reasons:

Wear and tear of equipment components (such as screws and bearing debris);

• Unclean cleaning with residual debris;

External environmental pollution (such as being brought in by operators).

Solution:

• Regularly inspect worn parts: replace aging metal or plastic components;

Strengthen the cleaning process: Use a vacuum cleaner to clean up residual powder after shutdown to avoid cross contamination;

Add detection equipment: Install metal detectors or X-ray machines at the post packaging workstation.

5. Unstable equipment operation (frequent shutdown)

‌Problem manifestation:The equipment stops without reason or experiences fluctuations in operating speed.

Possible reasons:

• Unstable power supply voltage;

PLC program failure or sensor triggering error;

Insufficient lubrication of mechanical components leads to overload.

Solution:

Stable power supply: Install a voltage regulator or UPS;

Reset the control system: restart the PLC and recalibrate the parameters;

Lubrication and maintenance: Lubricate the guide rails, gears, and other components according to the manual requirements.