BBDS Big-Bag Emptying

Big-bag can be loaded in three ways:

• Loading by fork-lift, model BBDS-FL, a simple system, suitable for big-bag containing free-flowing products and for a limited number of big-bag/hour
• Loading by dedicated hoist, model BBDS-CL, system suitable for big-bag containing less free-flowing products and for a higher number of big-bag/hour. The dedicated hoist doesn’t require a fork-lift during the loading phases. Hoist makes the emptying operations easier by straining the loops every time the product doesn’t freely flow. Handling by hoist is safer even with less skilled operators.
• Automatic loading by anthropomorphic robot, highly technological system, based on exclusive patents by F.lli Sacchi, suitable only when extremely high hourly quantities have to be processed (tens of big-bag/hour)

Big-bag with sleeve can be connected to product discharge section in different ways : 

• Double roll-bar fixed support  "lay-on". Best solution for not dusty and free-flowing products. Big-bag is matched by laying the bottom on a mechanic support. Product holding lace is released by a small door on the lower discharge channel.
• Rubber plate : best solution for little dusty and free-flowing products. Big-bag is matched by laying the bottom on the rubber plate. Product holding lace is released by a small door on the lower discharge channel.
• Mechanic coupling plate  : advanced solution, the best one for dusty or harmful products for man. Big-bag sleeve is inserted into an empty space that is then locked by cam-lock mechanism. The sleeve is sealed thanks to labyrinth geometry.
• Pneumatic coupler "inflatable rubber seal" : technological solution, perfect for dusty or harmful products for man. Big-bag sleeve is inserted into the interstitial chamber of a double-pipe channel to which an inflatable device responds during loading and discharge operations.

Flat bottom big-bag can be opened by :

• Cutting blades "high strenght". This solution is based on exclusive patents by F.lli Sacchi in bags cutting blades field. It's a blade resulting from years of research, suitable for the most compact materials that could otherwise damage the cutting edge. This solution is the most productive since it eliminates the manual opening of the lace that closes the sleeve.
• Manual opening by cutter. Economic solution, but dangerous for the operator because he's subject to suspended load risk and to powders dispersed in the air during the emptying operation.

Product coming out from the lower section of BBDS big-bag emptying machine can be handled in different ways :

• Direct discharge and dosing by gravity : the product is conveyed to the process by fall, using on/off or dosing valve. Dosing can be in continuous by volume/gravity for weight loss or dosed in batch according to a recipe with gravimetric technique "loss in weight" or "gain in weight" depending on process and required accuracy.
• Discharge and dosing by screw conveyor : the product is collected inside an intermediate cone hopper with suitable capacity and from that point it's supplied or dosed to the process. Dosing can be in continuous by volume/gravity for weight loss or dosed in batch according to a recipe with gravimetric technique "loss in weight" or "gain in weight" depending on process and required accuracy.
• Discharge and dosing by ESFP flat bottom extractor : the product is collected inside an intermediate cylindrical hopper equipped with ESFP rotating flat bottom extractor with suitable capacity and from that point it's supplied and dosed to the process. ESFP use allows to extract even the most difficult powders.Dosing can be in continuous by volume/gravity for weight loss or dosed in batch according to a recipe with gravimetric technique "loss in weight" or "gain in weight" depending on process and required accuracy. If necessary it's possible to  install a dosing screw conveyor with variable speed interfaced with dosing digital control unit.
• Discharge by pneumatic conveying in dense or dilute phase : the product is supplied to a rotary valve or to a dense phase pneumatic conveyor and then conveyed to the process machine.

Sacchi designs and produces upon order and can customise the project down to the smallest detail for customer’s best satisfaction, for this reason alongside the standard versions there are many special versions.

• Negative pressure closing system to completely eliminate emissions in the environment. Recommended for chemical/pharmaceutical environments in presence of active, harmful or toxic components or when powder emission in the environment is forbidden.
• Lumps breaker with single or double shaft to break any soft lumps.
• Bottom cutting systems for disposable big-bag with motorised closing of the stations sides
• Motorised closing system of big-bag emptying station
• Automatic hooking/unhooking system of the loops
• Locking system of telescopic big-bag sleeve
• Weighing and dosing systems of the extracted  product both in continuous and in batch
• Big-bag pneumatic massaging pads and flow aider
• Weighing system integrated with the station to constantly know the left weight and send replacement request to storehouse operator
• Dedicated management and monitoring software of the process
• Remoting system of process monitoring