Powder Fertilizer Packing Machine

Powdered fertilizer packaging machines are core equipment in the fertilizer and chemical industries for packaging powdered materials. Due to the high hygroscopicity, tendency to clump, and poor flowability of powdered fertilizers, packaging machines are prone to problems such as inaccurate metering, material blockage and leakage, and equipment jamming during long-term operation. The standardization of equipment operation and the quality of maintenance directly affect packaging accuracy, production efficiency, and the continuous and stable operation of the production line. Powdered fertilizer packaging machines involve the coordinated operation of multiple subsystems, including mechanical transmission, weighing and metering, electrical control, and pneumatic actuators. Establishing a scientific and standardized operation, maintenance, and troubleshooting system is fundamental to ensuring the long-term, efficient, and stable operation of the equipment.

The core of powdered fertilizer packaging machine operation and maintenance is "regular cleaning to prevent material accumulation, accurate calibration to ensure metering, and checking seals to prevent leakage."

Equipment Structure

From an operation and maintenance perspective, powdered fertilizer packaging machines can be divided into the following functional modules:

(I) Material Storage and Feeding Module: Includes a hopper, coarse screw, fine screw, feeding motor, and frequency converter. The screw feeding device is a major wear part and requires regular inspection for wear.

(II) Weighing and Metering Module: Includes a weighing sensor, junction box, weighing hopper, and weighing instrument. The sensor is the most precise component and requires regular calibration.

(III) Bag Clamping and Filling Module: Includes a bag clamping mechanism, discharge port, and valve. The bag clamping mechanism requires regular inspection for sealing.

(IV) Conveying and Sealing Module: Includes a belt conveyor and sealing device (heat sealing or sewing). The sealing device requires regular inspection of the heating element and sewing mechanism.

(V) Electrical Control Module: Includes a PLC controller, human-machine interface, weighing instrument, and various sensors. The electrical system requires regular dust removal and wiring inspection.

Application range of equipment

Powder fertilizer packaging machines are widely used in the fertilizer, chemical, food, feed, and pharmaceutical industries for quantitative packaging of powdered materials. They are particularly suitable for packaging powdered fertilizers such as ammonium sulfate, ammonium bicarbonate, phosphate fertilizer, organic fertilizer, compound fertilizer, and water-soluble fertilizer.

Types of available raw materials

The powdered fertilizer packaging machine can process materials including: ammonium sulfate, ammonium bicarbonate, phosphate fertilizer, potash fertilizer, compound fertilizer, organic fertilizer, water-soluble fertilizer powder, pesticide powder, chemical powder, etc.

Working principle of the equipment

The working principle of the powdered fertilizer packaging machine is based on the coordinated mechanism of electronic weighing and PLC automatic control. The system controls the screw feeder to add material to the weighing hopper according to the set packaging weight. The weighing sensor monitors the weight change in real time. When the set value is reached, feeding stops and the hopper is filled and sealed.

Equipment operation method

(I) Pre-start Inspection (5-minute quick check): Check the hopper, conveying pipes, and discharge port for damage or looseness. Check the seals (sealing rings, dust covers) for integrity. Perform a trial run to observe the motor and screw conveyor for abnormal noises, and ensure the bearing temperature is normal (≤60℃). Calibrate the weighing sensor (test with standard weights, error ≤±0.5%). Check the dust collector and dust suction device for normal operation.

(II) In-shift Maintenance (Real-time monitoring + timely handling): Prevent material accumulation—clean the discharge port and screw blades every 2 hours to remove adhering powder. Control dust—ensure the dust removal system operates continuously. Adjust parameters—adjust the conveying speed and discharge rate according to the powder's flowability.

(III) Post-shift Cleaning and Maintenance (15 minutes): Use compressed air to blow clean the inside of the equipment (avoid directly blowing on the sensors), the inner wall of the hopper, and the weighing platform. Lubricate the rotating parts such as motor bearings, conveyor belt rollers, and screw shaft coupling. Replace worn sealing rings and dust covers. Turn off the power and air supply, and clean the dust around the equipment.

Equipment maintenance methods

(I) Daily Maintenance: Clean residual materials and dust from the equipment after each shift. Check all fastening bolts for looseness. Regularly clean dust from the electrical control box.

(II) Periodic Maintenance: Add lubricating oil weekly (use high-temperature resistant, dust-proof lithium-based grease). Calibrate the weighing system monthly using standard weights. Check motor insulation and inverter parameters monthly. Clean dust from the control cabinet monthly. Newly installed machinery must undergo inspection, tightening, lubrication, and maintenance of transmission and moving parts within one week of use.

(III) Electrical Maintenance: Check for loose or aging wiring terminals. Test the sensitivity of the emergency stop button and photoelectric sensor. After shutdown, the heater body should be in the open position to prevent burns to packaging materials.

Equipment troubleshooting

Inaccurate Measurement: Clean the sensor surface to remove adhering powder. Check if the sensor is installed horizontally. Adjust the discharge valve opening and add a buffer device. Tighten the sensor terminals and recalibrate using standard weights.

Material Blockage: After shutting down and disconnecting power, clear any blocked powder. Check the wear of the spiral blades; replace if severely worn. Install a vibrator and arch-breaking device in the hopper.

Powder Leakage: Replace aged sealing rings and dust covers. Clean the dust collector filter or replace the filter element. Adjust the packaging bag positioning device.

Poor Sealing: Adjust the heat sealing temperature to the appropriate range. Check if the sealing mechanism is properly adjusted.