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SOP for Operation & Cleaning of Strip Packing Machine

To lay down the procedure for the operation of the strip packing machine.

The operations should include the following;
  • Mounting and dismantling of rollers.
  • Adjusting of sealing pressure
  • Adjustment of cutting device (Horizontal cuttings).
  • Adjustment of feeding.
  • Adjustment of the dropping of the tablets.
  • Adjustment of packing materials.
  • Vibrator setting.
  • Setting and adjusting batch printing attachment.
The operation applies to all strip-packing machines.

  • Operator: For proper running and handling of the machine – setting coding, lubrication and cleaning of machine accessories, sealing pressure, cutting, dropping operating temperatures and vibrator adjustments etc.
  • Maintenance: For proper operation of equipment, attending to machine breakdowns and performing preventive maintenance.
  • Q.C: for checking equipment status whether it is producing quality or rejecting the product.
  • Supervisors: for optimum output in obtaining satisfactory results over the life of the machine.

Mounting and dismantling of Rollers
  • Switch off the heater, untighten the locking rollers and pull out the heaters.
  • Untighten sealing pressure regulating stud to separate sealing rollers.
  • Untighten grab screws in sealing rollers cavities and pull out the rollers.
  • Remove back gears.
  • While mounting the rollers, reverse procedure.
  • Ensure that knurling on rollers interlock properly.
  • The centerline of the rollers should be exactly above the centerline of the draw brushes.
  • Should any adjustment be called for the left-hand roller shaft can be corrected by means of stud and nuts provided inside.

Adjusting of sealing Pressure
  • Check the cavity alignment of the sealing rollers.
  • Tighten the pressure setting stud for sealing pressure until the passing packing material is knurled and then tighten the stud.
  • For equalization of pressure gradually tighten the setting stud until the packing material leaves the sealing rollers in a correctly sealed position of over the web.

Adjustment of Cutting Device
  • After starting the machine, ensure that both the cams for the cutting device are functioning properly, one pushing the cutter assembly downwards and the other imparting scissors action.
  • Should the cutting not be exactly in the middle of cavities on the strips, the point of cutting can be adjusted by untightening the cutting gear.
  • Turn the hand wheel either forward or reverse depending on the position of cut. Tighten the screw when the position of cut is established.

Adjustment of feeding Device
  • Fill the hopper with a product to be sealed.
  • Ensure hoppers do not touch the vibrator bowl. This can be achieved by a telescopic hopper stand, which also controls the feed rate to the bowl.
  • Switch on the control vibrator switch.
  • Adjust the knob of the dimmer stat to fill the product in the channels. The product will be stopped in channels by the release pin.
  • Adjust the level of the bowl and chute by the 3 nos. of leveling screws.
  • The release pin can be locked in position by means of a feed stopper.

Adjustment of the dropping of the tablets
  • This can be affected by untightening the back cam gears.
  • Rotate the cam gear in either direction depending on the tablet’s drop.
  • The movement of the release pin can also be adjusted by loosening the screws in the release pin stopper and adjusting the rubber buffer.

Adjustment of Packing Materials
  • The feeding of the packing materials should be proper to cover the sealing area of rollers and also give proper width.
  • Adjustment of packing material roll can be done by means of screw and nut pair on packing material roll holding shaft by operating knob.
  • To avoid any misalignment and prevent the formation of wrinkles the foil running shafts are given to keep the running foils in a tight position.

Adjustment vibrator
  • Set the vibrator gaps relative to vibrations requirements.
  • Set the gaps of vibrations between the values of 140 to 160 volts for good operational values.

Batch Printing Unit

a. Installation
  • Mount Roller mounting bracket by means of 4 nos. bottles on the machine body.
  • Mount Batch Printing Unit with mounting shafts by means of fixing 2 nos. bolts on the mounting bracket.

b. Check up and Observe
  • While mounting the unit, the stationary roller should be parallel to the sealing roller (heating Roller).
  • The stationary roller should be in the right angle to the body of the machine.
  • The main bracket should be in level with the top plate of the machine.

c. Stereo Drum

To mount stereos:
  • Remove stereo drum from the mounting shaft.
  • Loosen the chuck nuts.
  • Remove rubber tiers.
  • Loosen the stereo rings (Poly Propylene) fix the stereos at the required place.
  • Press the stereos firmly and see that all the stereos are in the same level.
  • Put back the rubber tires and tighten the chuck nuts.
  • Place the stereo drum to its position to mount the flat stereos on plain stereo drum.

d. Felt Roller
  • Remove felt roller from the mounting
  • Soak the felt with sufficient ink.
  • Fit the felt roller on the mounting shaft.

e. Operation and Observations
  • Pass the packing material through the stereo drum roller and stationary roller to the sealing junction (Roller).
  • The stereo drum is above the stationary roller and by the help of the packing material movements, the stationary roller is being rotated and in turn drives the stereo drum.
  • Observe the printing impression.
  • If the printing impression is weak, then add a few drops of “Felt Type Ink” to the felt Roller.
  • If the printing is very dark then;
  1. It means, too much ink is added.
  2.  Wait till sufficient time for the pad to absorb the ink
  3. If smudging continues, then add a few drops (5 to 6) of printing aid on the felt rollers (printing Aid thinner)
  • Repeat the printing operation and if it needs pressure adjustment knob is to be adjusted.
  • If felt roller-soaked inked ink – is enough, the print may last one to two hours.
  • Recommended ink- felt type ink and thinner.

f. Lubrication
  • The stereos drum felt drum, and stationery roller are to be lubricated with grease once a month.


  • Ensure that all doors are closed, and all moving parts are covered. This prevents dust or powders from reaching the bearing surfaces.
  • The product should be free from dust and broken pieces before being loaded in the hopper.
  • The rollers should be cleaned by means of a soft wire brush.
  • The feeding assembly, bowl, chute, and hoppers should be dust free.

  • Grease the sealing roller shaft bearings daily.
  • Put a few drops of oil SAE 40 on the catch shaft and cam followers for cutting the device.
  • The cutting assembly dovetail slider should be oiled daily SAE 30.

  • Switch on the mains
  • Switch on the heaters
  • Set the TIC to the required temperature range
  • On/Off/Inch button should be on inch position.
  • When the pressure rollers have reached the required temperature, fix the feed throat (channel).
  • Switch on vibrator
  • Press the inch button for a trial run
  • If satisfied with machine performance, set the On/Off inch button to run position.
  • Continue operation and observe the performance i.e. cutting, coding, and dropping.


  • Ensure that pilots’ lights are functional.
  • Loose wires and bare wires should be reported immediately (all wires to be covered).
  • Ensure that all panel instruments are working i.e. TIC, Ammeters, and Variac.
  • An electrical terminal box should be closed always.

  • All moving parts should always be covered (cutting gears, cutting Assembly).
  • All abnormal noises should be reported immediately.
  • Always lubricate all moving parts at regular intervals.


Cleaning Procedure

During Batch Change Over.
  • Wear a nose mask and hand gloves.
  • Remove the previous product and label and affix the label “TO BE CLEANED’’.
  • Switch OFF the mains.
  • Remove the adhered powder with the help of a vacuum cleaner, followed by dry mopping with a lint-free cloth.
  • Dismantle the parts like the Chute assembly, hopper, vibratory SS bowl and dust collector.
  • Remove the sealing rollers, clean them with soft brass wire brush.
  • Dedust all other parts with a vacuum cleaner followed by dry mopping with the help of dry cloth.
  • Clean the area and affix the label “CLEANED’’.

During product changeover
  • Follow the step (During Batch Change Over.)
  • Transfer the detachable parts to the washing area.
  • Scrub the detached parts with lint free cloth soaked in purified water.
  • Rinse with purified water.
  • Clean the non-detachable parts and body of the machine, with clean lint free cloth soaked in purified water followed by mopping with clean lint free cloth.
  • Clean the area, if found ok, affix the label “CLEANED’’.

At the end of the day
  • Keep all the material tightly closed and ensure the presence of a status label.
  • Follow the step (During Batch Change Over.)

  • TIC: Temperature Indicator Control
  • SS: Stainless Steel
  • SAE: Standard American Engineers


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