Self-Erecting Bins (SEB)

Tough Roller Chains Hold Thick Slats

Strong, wear-resistant, 6-inch roller chain runs from the bottom to the top, with 3/4-inch thick, 7-inch deep, steel, horizontal flights attached every 12 inches. This tough chain has an ultimate strength of 140,000 pounds and rollers hardened to Rockwell 57.

Astec Drag Chains Ride Smoothly

With wide idlers the flights don't skim or "hydroplane" over the mix. Mounted on floating hold-down bearings, these idlers also support the return portion of the chain and minimize vibration. As a result there is less wear to the sprockets, liners and the chain. Floating hold-down bearings have grease piping that lets you lube both sides from the conveyor.

Abrasion Resistant Liners

Astec lines the bottom and sides of the conveyor with abrasion resistant liners.

Astec Gives You Segmented Sprockets

The drag chain rides on segmented sprockets located at the head and tail shafts. Hardening to Rockwell C60 gives the sprocket teeth a uniform, deeply hardened wear surface.

Each sprocket bolts to a split hub. You can replace the sprocket one piece at a time without removing the chain, which drastically reduces the time and effort required. The bottom sprocket is adjustable so the drag chain can be tightened.

Batcher

A batcher is installed at the top end of the SEB's drag conveyor. It has a capacity of four tons and collects the mix discharged from the drag conveyor. Segregation is minimized by dropping full batcher loads into the surge bin. While the batcher is filling, mix in the surge bin is weighed and may be loaded into a truck. The batcher and surge bin discharges are computer controlled so the batcher gates cannot open while the surge bin gates are open. If the batcher becomes full while the surge bin is making drops into a truck, the control system interrupts bin loadout long enough for the batcher to empty into the surge bin.

Batcher Gate Cylinders

Batcher gate cylinders are located on the endplates of the gates for greater efficiency. This design more than doubles the force to open the gates while consuming less compressed air. The round shape of the batcher provides greater capacity and helps fight segregation.

Surge Bin

Rounded bin corners prevent mix build-up in the bin, and steep walls on the loadout cone let material flow freely. For loadout, two radial gates open at the bottom of the bin. The large bottom openings provide fast truck loading. The unique Astec discharge gate design minimizes segregation. Insulation around the cone also enhances good flow, especially if you have to hold mix in the bin for a while. Hot oil or electric heating for the cone is optional.

Surge Bin Frame

The Astec SEB features a strong skirt beam and solid bent plate corner supports provide a rigid and stable framework supporting the surge bin hopper atop the load cell package.

Load Cells

The surge bin rests on four shear-beam load cells that continuously weigh the surge bin to let the operator know how much mix is in the bin. Mix amounts dropped into the bin by the batcher are tracked by computer. Likewise, truck load-out weight is recorded by the computer and the system generates a printed ticket for each truck. The NTEP certified under slung load cell mounts provide accurate and reliable weighing and loadout performance. The under slung mounting feature ensures precise and stable bin positioning to achieve easy calibration and steady scale response.

Control Centers

The standard 12x12 foot control center is a fully equipped, climate controlled plant operating environment. Like all Astec control centers, it comes completely wired and with all controls installed.

Choices on Control Centers

Astec control centers can be permanently mounted on the frame of the SEB or remotely postioned.

An optional, larger “pilot” control center, with room for an office, is also available.

Options

Emission-capturing canvas covers and load-outs tunnels as well as articulating suspension are available.