Cold Feed Systems

Astec cold feed and recycle units are built to give many years of service in demanding environments.

All parts of Astec bins, from the bins themselves to the steel bulkheads and foundations, are fabricated to perform and stand up to front-end loaders and abrasive materials year after year.

Features such as the protected walkway access at the backside of the belt feeders, steeper bins with better flow and cable trays on portable and relocatable bins give you even more value for your money. Astec designs and manufactures bins to be the most durable, productive and user-friendly.

Astec offers stationary systems, relocatable modular systems and self-contained portable systems.

Features & Benefits

  • Astec manufactures stationary systems, relocatable modular systems and self-contained portable systems.
  • Bins constructed of 1/4 inch (.635 cm) steel plate
  • Steep walls and self-relieving bottom openings on Astec bins promote smooth flow and prevent bridging of materials
  • Variable-speed belt feeders allow changing the production rate while keeping the mix formula unchanged
  • All belt scales come with wind guards to maximize accuracy

Stationary Cold Feed

Astec stationary cold feed systems come in a range of capacities to suit any production requirement. Stationary systems also offer flexibility for future add-ons or alterations. Stationary cold feed bins are anchored to concrete foundations.

Relocatable Cold Feed

The Astec relocatable cold feed system is set in place on a paved site that has at least 2,500 pounds per square foot (12,206 kg per m2) soil bearing pressure. It is supported by its heavy-duty, tublar steel foundation pads. Modular construction eliminates on-site fabrication. Bulkheads and hinged wing walls are safer and eliminate expensive concrete bulkheads.

Portable Cold Feed

The portable cold feed system can be set up without cranes in less than an hour, which saves considerable time and money. No concrete or asphalt foundations are required, only compacted soil able to bear 2,500 pounds per square foot (12,206 kg per m2). Comes with built-in bulkhead and wing walls.


Cold Feed Bin
FEATURES

Access For Maintenance

A walkway in-between the bulkhead and collecting conveyors gives you safe access to the back of the bins and conveyors for maintenance.

Bulkheads

Bulkheads with hinged wing walls are included on relocatable systems.

Cable Trays

Cable trays* keep power and control cables organized and off the ground.
*standard on portable and relocatable, optional for stationary


Cold Feed Bin
CONSTRUCTION

Defend Against Impact And Abrasion

Astec constructs cold feed bins of 1/4 inch (.635 cm) thick steel plate reinforced with stiffeners. Top edges of the bins are formed into channels for added strength.

Assure Even Material Flow

Steep walls and self-relieving bottom openings on Astec bins promote smooth flow and prevent bridging of materials. Heavy-duty grizzly bars are available as an option. They are installed on top of the bins to scalp off oversized material and debris.

Astec also offers optional dancing plate bin vibrators, which keep damp or caked-up materials from sticking to bin walls. The vibrator is installed on a hinged plate inside the bin to avoid shaking the entire bin.

Astec cold feed bins are designed with steep walls and a self-relieving bottom to encourage smooth material flow.
For added strength, the top edges of the bins are formed into channels.
Bin vibrators keep materials from clinging to the bin walls.
All systems can accommodate options such as grizzly bars.

Cold Feed Bin
CONVEYORS

Astec conveyors, with vulcanized rubber belts, efficiently move material from the bins to the drum.

Collecting Conveyor

The collecting conveyor runs under the belt feeders to collect material from all the bins. The tail section unbolts, then easily reattaches to the collecting conveyor extension when adding future bins. The upturned end empties onto a scalping screen (if used) or onto an incline conveyor.


Belt Feeders & Idlers

You can assure accurate mix formulas with variable-speed belt feeders. They let you change the production rate while keeping the mix formula unchanged. Each feeder is powered by a vari- able speed motor with a Danfoss® controller and Sumitomo® right angle reducers. These drives provide precise control of belt speed.

Troughing idlers are standard with Astec conveyors. The troughing design results in a longer belt life and reduces material spillage. The troughing idler belt is supported on nine-inch (22.56 cm) centers. Flat idlers are optional.

Head pulleys on both are covered with rubberized traction material that makes firm contact and moves the belt without slippage.


Inclined Conveyor

Inclined conveyors with rubber belts take the aggregate from the cold feed unit to the drum mixer. The inclined conveyor is available in relocatable, stationary or portable designs.

Most often, the inclined conveyor incorporates a scalping screen at the front end. On portable units, a transfer conveyor is used as the deck selector on two-deck screens. Pneumatically activated belt scrapers are standard on every Astec inclined conveyor. A walkway can be added as an option.

Collecting conveyors collect material from all bins.
No sheaves or belts on the Sumitomo drives means reduced maintenance time.
The inclined conveyor incorporates a scalping screen to remove oversized material.

Cold Feed Bin
ADDITIONAL FEATURES

Bin Vibrator

Dancing plate bin vibrators provide better material flow than common weld-on vibrators.


Bypass Chute

A bypass chute can be incorporated to collect calibration samples.


Belt Scales

A load cell in the belt scale accurately indicates the weight of a section of belt running over a weigh idler. Load cell information, combined with the belt speed, shows how much material is entering the drum mixer. The scale includes a remote operated test weight for easy calibration. As material is run across the scale, a sample is routed to a truck via the cylinder operated drum bypass chute, then veried on a truck scale. All Astec belt scales come with wind guards to maximize accuracy.


High-Density Polyethylene Liners

Optional high-density polyethylene liners can be installed inside the bins for added wear protection. Liners also signi cantly reduce the friction between bin walls and material, producing ultrasmooth material flow.