bag filling machine introduction

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Pragya Technology India Private Ltd., Engineering Design and ConsultancyServices, Pune

Bag Filling Machine

18-Jan-11


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Index

Sr.No.

Description Page No.

1 Introduction 1

2 Project Aim 1

3 Bag Filling Mechanism 3

4 Working and Parts of machine 4

5 Applications 5

6 Images of Bag Filling Machine 6

7 Technical Specifications 8


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Introduction

PROJECT AIM:

The Vertical form fill sealing machine (FFS) or Bag filling machine is a type of automated

assembly-line product packaging system, commonly used to in the packaging industry for food, and a

wide variety of other products. The machine constructs plastic bags out of a flat roll of plastic film,

while simultaneously filling the bags with product and sealing the filled bags. Both solids and liquids

can be bagged using this packaging system.

The typical machine is loaded with a continuous flat roll of plastic film, which has had labelin

and artwork applied to the exterior or interior of the film. Note that while plastic is the most

commonly used packaging material in the food industry, the technology can also be used to form

continuous paper and fabric product containers by changing the edge sealing/seaming methods.

Fig 1 Typical form fill seal machine
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For some products the film may first be fed through a sterilizing chemical bath and dryer prior

to use in the packaging system. The film approaches the back of a long hollow conical tube, and when

the center of the plastic is near the tube, the outer edges of the film form flaps that wrap around the

conical tube. The film is pulled downward around the outside of the tube and a vertical heat-sealing

bar clamps onto the edges of the film, bonding the film by melting the seam edges together.

To start the bagging process, a horizontal sealing bar clamps across the bottom edge of the

tube, bonding the film together, and cutting off any film below. The sealed tube end is then lowered

onto a precision weighing table and the product to be bagged is dispensed through the long conical

tube in the center of the bag.

When the tare weight of the product-filled bag is reached, filling stops, and the horizontal

sealing bar seals the top of the bag, and simulatenously forms the bottom of the next bag above. This

bag is then cut off from the tube and is now a sealed package, ready to advance onward into the

product boxing and shipping processes.

During the final sealing process, the bag may be filled with air from a blower or from an ine

gas supply. Inflating the bag helps reduce the crushing of fragile products such as potato chips, whi

inflating with an inert gas helps drive out oxygen and retards the growth of bacteria that would spoil

the product.

Dual web systems are also available for four side sealed pouches, as well as pouches requiring

different materials for each side. Dual web systems use two rolls of material instead of one, which are

fed in from opposite sides of the machine. The bottom and sides are heat sealed together to form the

pouch, and the product is loaded from the top. The pouch with loaded product then advances

downwards and the top is sealed and pouch is cut off. The sealing of the top of the pouch forms the

bottom of the next pouch. During this process a tear notch may be added.

The feeding of material and cutting of the pouch can be determined either by pouch length, or

indexing to an eyespot, which is detected by a visual sensor.While single web systems are popular for
http://en.wikipedia.org/wiki/Sterilization_%28microbiology%29http://en.wikipedia.org/wiki/Tarehttp://en.wikipedia.org/wiki/Inert_gashttp://en.wikipedia.org/wiki/Inert_gashttp://en.wikipedia.org/wiki/Potato_chipshttp://en.wikipedia.org/wiki/Potato_chipshttp://en.wikipedia.org/wiki/Inert_gashttp://en.wikipedia.org/wiki/Inert_gashttp://en.wikipedia.org/wiki/Inert_gashttp://en.wikipedia.org/wiki/Tarehttp://en.wikipedia.org/wiki/Sterilization_%28microbiology%29


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food applications, the dual web four side seal system is often popular for IVD and Medical device

products.Closely related is the horizontal form-fill-seal machine, which is generally uses more floor

space than a vertical system.

Modern advancements in pouch forming technology have allowed for smaller and smaller

Vertical pouch forming systems.

BAG FILLING MECHANISM

Fig:2 Bag filling machine mechanism/layout


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WORKING AND PARTS OF MACHINE

STATIONS

Empty bags magazine: It has two trays where empty bags are stacked. It incorporates

adjustment for different bag sizes. It has a total autonomy of 250-300 units depending on thickness

and bag type.

Change of tray is done automatically once one of them is empty. This is detected by a

photocell. Driving is done pneumatically guided. Motion is smooth, silent and without vibrations. An

acoustic alarm sounds during changing process.

1. Bag catching group: It is formed by a main body where different vacuum cups are located.

They can be easily adjusted on guides. Frame is driven by pneumatic cylinder with two

movements to proceed with the complete catching cycle.

2. Vertical: system goes up and down to take the empty bag and raise it from the stack.

3. Frontal tilting: system tilts and delivers the empty bag at the level of main frame where bag

opening station is located.

4. Bag opening station: Frontal vacuum cups tilt up once empty bag is delivered into the

opening station for a pre-opening action. A lower cup acts at the same time. Both

simultaneous actions allow the opening arm to enter into the bag mouth and take it by

pressure at both inner sides of bag.

5. Placing arms: Placing arms have the bag caught by its sides and tilt 90 up to deliver it open

to the filling spout.

6. Filling spout: Inner opening pneumatic filling spout adjusts to different bag sizes by pressure

detector. Side dams permit tightness during product discharge.

7. Bag mouth stretching and flattening: Two pneumatic fingers enter into the bag mouth and

stretch both sides outwards once product discharge is over and filled bag is released from

filling spout. Then, a squared plate flattens the bag mouth and delivers this guided to the

closing equipment.


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8. Quick exit belt conveyor: Filled bag is removed from filling area by means of a short belt

conveyor driven by frequency inverter. This belt runs at high speed allowing fast placing for

next empty bag.

9. Closing belt: It is a motorized belt conveyor placed after quick exit belt. This is also equipped

with frequency inverter for synchronization with closing equipment stitching, sealing or

gluing -.

10. Height adjustment for exit belts: Both quick and closing belts are supported onto an only

main frame with height adjustment by wheel. There is an only adjusting point this way.

11. 90 bag pusher: This pneumatic pusher is placed at the end of closing conveyor. Pushing

action is done parallel to the belt level bag bottom to avoid adjustment for different

sizes. Pusher delivers bags 90 with bottom ahead for a right later conditioning produc

spreading inside the bag - by means of bag flattener or any other system.

APPLICATIONS

Open mouth sacks:

A. Paper

B. Polyethylene

C. Woven polypropylene


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IMAGES OF BAG FILLING MACHINE


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TECHNICAL SPECIFICATIONS

System Bag Filling Machine

Capacity Max: 50kg

Min: 20 Kg

Resolution 10 gm

Accuracy 2 e

Number of filling 4-5 bags / min

Filling valve Pneumatically Operated

Load sensor Load Cell

Operating Temprature 10 C - 50 C

Power 230 V AC, 50Hz

Air supply 5-6 kg/cm 2

bag filling machine introduction

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