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Processed powders: plaster, cement and starch
Plaster preparation
Our client is a leading manufacturer of plaster and plasterboards.
The objective of this installation is to empty 25kg bags at high speed, with a minimal human operation, to feed a downstream pneumatic conveying system.
The discharge rates required by the customer are as follows:
- Gypsum: 7 tons/hour
- Cement: 15 tons/hour
- Starch: 11 tons/hour
Feeding the auto bag dump station:
The palletized sacks are lifted using a bag manipulator. The vacuum lifting system MANIS, can handle and lift sacks effortlessly by a single operator. Using this equipment, the operator can easily place the bag on the infeed conveyor of the bag emptying system.
Automatic bag emptying:
The belt conveyor is designed with cleats to transfer the bags to the drive belts of the bag automatic discharging system Varislit®.
The bag automatic discharging system Varislit® opens up all types of bags at an average rate of 10 bags per minute. The double-blade rotary system, which is standard on this machine, and its elongated shape allow large bags to be processed with a high emptying rate.
Empty bag management:
Its patented inversion system carries empty bags to a sack compactor, which is an integrated feature of this system. The bag compactor reduces the volume of waste, while minimizing dust emissions in the working environment.
Dust emission management:
A dust collection system can be integrated on the automatic bag emptying machine Varislit®.
The dust extraction option offers the best solution for automatic, fast and dust-free opening.
Furthermore, the drive mechanics are located outside the equipment to avoid contact with the raw material (bulk, granules, powders, etc.). A static chute is bolted under the machine to funnel the powders into the pneumatic conveying system.
The introduction of the bag is now conducted ergonomically and at high speed in a clean environment. The bag automatic discharging system Varislit® allows the emptying and compaction of the bags, while ensuring the area is clean by a dedicated and integrated dust collection system. The machine is designed according to the Atex directive, thus integrating a reinforced frame and an explosion vent connected outside the building.
