Welded buckets / buckets for elevators are made of both black steel and stainless steel. Welded buckets are especially recommended in the following situations:

in the transport of highly abrasive products such as sharp minerals, gravel or metal shot
when the conveyed product is difficult to extract from the bottom of the elevator, and the elevator is filled by falling buckets
with steel buckets, the belt speed is slow to reduce the abrasive effect and belt tension

Depending on the type of transported material, different types of construction and shape of the buckets are used. In accordance with the PN-75/M-46650 standard, the following types of buckets are made:

TYPE “ A ” – shallow buckets with raised sides are used for light and fine bulk & powder materials, e.g. flour, semolina or grain middlings etc.

TYPE “ B ” – shallow, rounded buckets are used for light granular materials, e.g. cereals, oilseeds, legumes, fruits etc.

TYPE “ C ” – medium-deep buckets are used to transport materials that tend to stick to the walls of the buckets, e.g. unrefined sugar, wet coal dust etc.

TYPE “ D ” – deep buckets – used for fine/coarse grained and heavy materials, e.g. dry sand, cement, coal etc.

TYPE “ E ” – deep buckets with a cut-off back wall are used for the transport of slightly dusty and rolling materials, e.g.: fly ash or potatoes etc.

TYPE “ F ” – ridge sharp-angled buckets are used for transporting bulk & piece materials, easily crumbling and not sticking together, e.g. coal or coke etc.

In order to protect against corrosion, buckets can be galvanized or covered with a layer of rubber or plastic. Depending on the required resistance to impact, abrasion or chemical factors, the buckets made by 4INDUSTRY can be made of the following materials:

Galvanized steel – thermal resistance of continuous operation +180 ° C / short-time 200 ° C
Stainless steel – thermal resistance of continuous operation +250 ° C / short-time 400 ° C
Buckets used in high-speed conveyors and collecting the material transported from the bottom of the casing are exposed to high wear of the front wall due to abrasion or deformations resulting from impacts. To prevent this, reinforcements are used in the form of bands welded on the rim, usually made of flat steel. There is also the option of strengthening the entire front wall of the bucket.

When transporting materials of high density and weight, there is a technological possibility to strengthen the area where the mounting holes are located, both in the middle part and on the back wall of the bucket.

Depending on local requirements, there are also options for finishing buckets that allow for the drainage of transported materials (e.g. a wet strip taken from the day of a water reservoir). In such cases, drainage holes are provided in the side walls or bottom of the bucket.