Screw conveyors

Screw conveyors


This powder conveying system is particularly suitable for high capacity loads at low angular speed. It is made of a screw that rotates around its own axis, thereby exerting an axial thrust on the material contained in the conveyor tube.

The system is built of stainless steel 304 or 316; upon request it can be built of painted carbon steel.

GIMAT screw conveyors are built to customer specifications (for approximate indications see the table attached hereunder to identify the configurations possible), with particular care and attention as regards protecting from particulate all the bearings of the drive and thrust-bearing units and any intermediate supports, in case of conveyors longer than 4-5 mt.

In this connection, GIMAT has developed for the drive and thrust-bearing units a special dust seat with a greasable packing, with automatic recovery of any slack created during operation.

In this way, the packing give optimum performance at all times, ensuring a perfect seal on the rotating shaft of the screw.

This system reduces the number of manual adjustments that the traditional sealing systems require and also minimizes the annoying and hazardous powder leaks that reduce the duration of the bearings.

The intermediate support of the mechanical conveyor is made with a special self-lubricating material that is FDA-approved for contact with food; it has frontal seals, and a preloading device, made according to GIMAT design.

What are the main advantages of a screw conveyor?
1. High flow rate;
2. Suitable for horizontal, inclined and even vertical travel (elevator);
3. Loading and unloading at any point of the line;
4. Self-support between the two bays;
5. Suitability for conveying products with high temperatures;
6. Stainless steel versions perfectly suitable for conveying chemicals, pharmaceuticals or food products.
7. Free of powder dispersion;
8. Durability;
9. Conveyed product can be cooled in cases of spiral conveyors made without outer jacket for containing coolant.

Upon request the flexible screw conveyor can be designed and built in conformity to ATEX Directive ATEX 2014/34/EU for Zone 2 – 22 and Zone 1 – 21


TC 114 screw conveyor on wheels with uptake from hopper.
Complete with agitator and top cap for connection to centralized exhaust
system for the reduction of particulate generated when opening the bags. Horizontally tiltable version to permit easy dismantling and removal of the blade for cleaning.

TC 139 screw conveyor in version with hopper on wheels.
Internal polishing of hopper and blade to facilitate movement of the content and respond to MOCA requisites.
Wired control panel on machine with inverter for capacity adjustment of the powder conveyor system.

Grooved screw conveyor completely openable with continuous welding of helicoid blade. Version suitable for contact according to 1935/2004 directive.
Uptake from the discharge of a vertical ribbon blender, without altering the blend during movement.

TC 219 screw conveyoron wheels, pneumatically tiltable with dual pneumatic piston and two-hand controls to facilitate dismantling and cleaning.

Grooved screw conveyors in horizontal version and different sizes, with functions of extraction and dosage. Update from under silos via vibrated bottom or flat-bottomed extractor.

Mixing and conveyor system for powdered foods via 2000 lt horizontal ribbon mixer and conveyor with tiltable screws type TC168.
Version suitable for environment required to comply with standard
ATEX 2014/34/ EU.