Offloading Systems

Techmatic supplies a range Offloading Systems including:

  • Small Bag Unloaders
  • Bulk Bag Unloaders
  • Bulk Tanker Offloaders
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Small Bag Unloaders are used to unload material from 20, 25 or 50kg paper bags into a process. An integrated 2m2 reverse jet pulse filter with an exhaust fan ensures dust free unloading of the bags. Filter bag cleaning is done by means of a compressed air pulse that drops any accumulated dust on the filter bags back into the hopper below. The outlet hopper can be made to suit the application. This could for example be the integration of the Vertech or vertical lifting screw to elevate the material into a tank or hopper, a rotary feeder to meter material into the process or a manual knife gate to be able to isolate the process below the unloader from the unloading area. Two doors can be closed to isolate the unloading area.

A removable round bar screen in the unloader is used to prevent the bags and paper from falling into the chute below. This can be replaced with a vibrating mesh screen where finer contaminants need to be removed from the material before flowing into the chute below the screen. Units can be manufactured in mild steel, stainless steel 304 or 316 and can be designed to comply with zone 21/22 or zone 1/2 requirements.

Bulk Tanker Offloaders includes Filling Pipe Assemblies to secure the filling pipe of a silo from unauthorized access. An integrated limit switch can be used to sense when a filling hose from a bulk tanker is connected to the filling pipe so that the reverse jet pulse filter on the silo or bin can be started.

A standard padlock can be used to lock the bracket in a closed position. Precision lasercut and bent sections are used for a quality assembly. The Storz coupling is a standard pressure certified 100NB coupling fitted with a blank cap.

Bulk Bag Unloaders are designed for easy, semi-automated unloading of bulk bags. The bulk bag support frame is independent of the unloading frame and is designed to be transported by means of a forklift truck or lifted with a crane.

The bulk bag is hooked onto the frame and the frame set on top of the unloading gantry on the standard version. Integrated spring columns are compressed by the weight of the full bulk bag after it is released by forklift truck. Bag opening is safely accessible below the compression tray.
A material receiving hopper with an integrated dust extraction spout is fitted below the compression tray. As an option an integrated reverse jet pulse filter can be fitted to the bulk bag unloader. Once the bag is open material flows from the bag into the receiving hopper.

As bulk bags empty they tend to elongate. This slack is taken up by the spring columns integrated into the frame. These slowly lift the bag as the load lightens and ensures that optimum material flow is achieved from the bag. Specially designed hooks on the top of the frame ensure that the tabs on the bags are securely fastened to the lifting frame even when the bag is empty.

Bulk Bag Breakers are designed for fully contained discharging of closed bottom bulk bags .

Bulk bags are suspended off a spreader bar that ensures that the bag retains its shape after discharge to ensure that the complete bag is emptied.

The bag is moved through the front opening of the bulk bag breaker and then dropped onto a fixed four bladed knife which is installed in the hopper. This is designed to cut diagonally across the square bottom panel of the bulk bag. All four triangular flaps then open to discharge the complete contents of the bag.

A 20m2 reverse jet pulse filter is mounted in the top enclosure and the exhaust fan ensures a positive inflow of air into the front opening of the bag breaker enclosure thus ensuring that no dust escapes. Dust is discharged back into the hopper when the filter pulses for cleaning.