How to maintain sachet packing machine

Sachet packing machine is commonly used for powder, granule and liquid, sauce etc. While during the daily running , the maintenance for the sachet packing machine is also very important. Now let’s summarize the most important and useful guidance for sachet packing machine maintenance.

 

1. Overview

1) This regulation is applied for maintenance of packing machines.

2) Structure: A packing machine consists of weighing hopper, controllable scale, vibrator and heat sealer. Vibrator can vibrate to feed material into weighing hopper, then the scale weighs and at last material are packed in specified weight.

 

2. Standard

1) Parts

a. Parts of packing machine keep complete and conform to technique requirements;

b. Measuring instrument, controller and automatic adjusting device should be complete, accurate and sensitive;

c. Purified air pipes and control lines are set reasonably in accordance with technical requirements;

d. Anti-corrosive equipment should be effective and comply with technical requirements.

 

2) Performance

a. The machine can weigh accurately;

b. Clips move quickly and flexibly;

c. Vibrator works in high efficiency;

d. The machine output can realize practical production need.

 

3) Technical information

a. Technical documents and manual for installation and operation;

b. Document for operation, maintenance and verification;

c. Drawings for wearing parts;

d. Regulation for equipment operation and maintenance.

 

4) Operation environment

a. Clean equipment and spacious environment;

b. Safe operation and reasonable layout.

 

3. Equipment maintenance

1) Daily maintenance

a. Observe vibrator’s working whenever necessary;

b. Check pressure of purified air and motion of clips;

c. Decrease corrosion caused by caustic soda.

 

2) Regular check

Check bolt fastening of the vibrator weekly and instrument and lines monthly and keep electrical cabinet clean and dry.

 

3) Common errors and solutions

Errors	Causes	Solutions
Inflexible clip motion	Low air pressure or lacking lubrication on telescopic boom	Connecting it with purified air, increase air pressure and lubricate telescopic boom
Inaccurate weighing	Zero drift of controller	Reset weight
No motion of the vibrator	Relay disconnects or wire is broken	Switch on the relay or wire again

 

4. Maintenance period and contents

1) Minor repair

a. Check hopper connection and avoid material leak;

b. Check bolts and pins of clips;

c. Check instrument cabinet and keep machine dry;

d. Check vibrator connection.

 

2) Medium repair

a. Check line corrosion caused by alkali mist;

b. Clean away dust and foreign matters on control cabinet, change sealer and make sure that cabinet door can be closed firmly;

c. Check springs and shafts of the vibrator;

d. Check and clean purified air pipe.

 

3) Overhaul

a. Including contents of medium repair;

b. Repair packing guiding slide and keep it flat;

c. Check control cabinet corrosion and the lines;

d. Check and maintain coil and potential controller of the vibrator.

 

5. Maintenance method and quality standard

1) Hopper, clips and packing guiding slide

a. The hopper should be flat, smooth and dry internally;

b. The purified air pipe is not broken and doesn’t leak. The telescopic boom of clips keeps smooth and is lubricated to avoid corrosion;

c. The packing guiding slide keeps smooth and is connected firmly to avoid leak. And regular check can prevent it from severe alkali corrosion;

d. Clip bolts should fasten well.

 

2) Controllable scale

a. The electrical appliances should be dry and clean;

b. The control cabinet is closed and sealed;

c. Control lines should be protected to avoid corrosion and tripping; the connector should also be dry.

 

3) Vibrator

a. The current of the vibrator cannot be too high;

b. The vibrator case should be connected safely and firmly;

c. The spring, shaft and other parts of the vibrator should be checked for any cracks with penetrant inspection.

 

6. Commissioning and verification

1) Before commissioning

a. All equipment and devices are clean;

b. All baffles and covers are dry and fastened;

c. All equipment are in a safe operation position;

d. All protection devices are turned on.

 

2) During commissioning

a. All preparations are finished;

b. Switch on controller and have a delay to the next step;

c. Set internal validity check;

d. Delay again and set necessary parameters during the delay;

e. Adjust the clips and the vibrator properly;

f. Operate according to operation procedures.

 

3) Verification

a. Check documents and electrical drawings should be complete for the next verification;

b. After verification, start operation after all regulated procedures.

 

7. Safety notes

1) For maintenance

a. Carry out maintenance in strict accordance with operation methods and safety regulations;

b. Check working situation of the vibrator and the hopper regularly;

c. Check accuracy of scale regularly and reset the weight when necessary;

d. Keep the control cabinet closed and the lines dry.

 

2) For overhaul

a. Handle the formalities before overhaul as regulated;

b. Comply with overhaul regulations strictly;

c. Before overhaul, cut off power and hang the sign of “No Closing”.

 

3) For commissioning

a. Prepare well for commissioning;

b. Wear face mask and goggles;

c. Only commissioner who are qualified with a Safe Work Permit can conduct commissioning;

d. Stop commissioning for any abnormality and restart it after dealing with it.