1- Big bag filling procedure:
The general procedure of big bag filling is as follow which some options can be added to the below system.
- Hanging of empty big bag by operator in big bag filling station
- Lifting of empty big bag to high position
- Start of filling
- Big bag being filled will start to lower the mechanism automatically
- Once a certain weight is reached, the big bag will reach the vibrating table
- Vibrations will be applied at chosen intervals
- End of filling: big bag will already be on vibrating table and is ready for pick-up by forklift
2 -Big Bag physical specifications
The first thing to consider when choosing a Big Bag filling system is your big bag specifications which includes the big bag capacity and big bag shape (4 handles or 1 handle).
The big bag hanging can be adjustable in height and width manually or automatically with pneumatic cylinder.
4 Handles or 1 handle is selected depending on the industrial sector, for example for the packaging of large quantities of bulk material such as fertilizer and quarries industries, 1 handle big bag might be preferred.
Filling rate:
By specifying the required filling rate, the level of automation will be identified, for example if you need high filling big bag system up to 60 bb/hr, it is necessary to use a pre- dosing system (buffer hopper and high speed screw conveyor with dosing precision) and automatic big bag conveying system.
In high flow rate feeder, the dosing system is fitted with a main tubing with a butterfly valve for high flow dosing (99% of the dose). A “Low Flow” dosing screw completes the system to ensure dosing accuracy over the latest 10 kg. The butterfly valve at the end can be used to cut off the material falling tail at the end of dosing.
Different filling head system can be selected to achieve the higher performance of the big bag filling system which includes below options:
–Inflating seal consider to ensure a tight connection between the filling tube and the big bag.
– Automatic release is installed to remove the package at the end of dosing.
– Rotating filling head to make ergonomic hanging of empty big bag by operator in big bag filling station.
– Big bag performing fan
– Dust extraction pipe which is connect to the de-dusting system.
– Weighing system: for some powder and bulk material with strict hygienic requirements, weighing system install directly on the big bag filling head to reduce the material retention zones on the floor.
Weighing system:
There are two weighing systems, Gross or net weighing. In the net weighing system, bulk products pre-weight in the batch and then discharge into the big bag in one shot.
In the gross weighing, the station is installed on 4 load cells, so it is possible to automate the filling sequence of the big bag.
Conveying and transport:
After filling and releasing the big bag it is possible to move the big bags up to the specified distance by adding motorized roller conveyors and then transport them by forklift, etc.
The automation level (fully automatic, semi-automatic and manual process) depends on the desired big bag filling rate. For low rate up to 20 bb/hr, manual conveying is sufficient and for high filling rate, up to 60 bb/hr, automation is recommended.
The loading of the pallets are carried out automatically by automatic pallet unstacker.
Vibrating table:
A vibrating table is used to compact the low density materials in the big bag and give an optimal shape to the big bag
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intelligent detailed solutions and proven designs, which are the result of long term developments, represent systems engineering that is welcome in all industries.
The different bulk material characteristics require often specially adapted solutions to guarantee a clean and calibration-conforming filling. Experienced designers and the complete in-house manufacturing up to the system control and programming are the prerequisites for a fast and customer oriented total solution for a project.