Product Details Supplier Info More products

Liverpool-based Jacob’s Biscuits has installed Pneufeed air-jet-type tray denesters from Turbo Systems on three of its savoury biscuit lines.

The denesters denest the trays by means of a Venturi principle and were chosen for their reliability and their speed of size change.

The denesters have been set up to supply 200g, 300g and 500g trays at speeds of between 34 and 40 trays per minute.

The speeds for each tray size are preset and are selected by rotary switch to enable the precise control of the line speed.

The trays are denested onto a plain belt conveyor and are then loaded manually by operators.

If there is a line stop downstream for any reason, the denester has a queue sensor on the out-feed that will automatically stop and start the denester.

When size changing, the 200g and 300g trays can be substituted for each other without any changes as they have the same length and width dimensions.

Although these trays have different internal cavity layouts and depth, the air-jet system can accommodate this without change as there are no suckers or parts needed to pick the tray.

Changeover to the 500g tray takes approximately two minutes and is both quick and simple, according to Turbo Systems.

This involves moving magazine and out-feed side guides, the side nozzle positions and the top gate position.

All size-change parameters are tool free using thumbscrews to release and move the parts to preset end stops.

From the beginning of the project, Jacob’s worked closely with Turbo to engineer a high-quality denester fully reflecting its requirements.

Turbo developed a gating frame to give additional stability for the large tray sizes, modified the shape of the magazine gates and added needle valves to enable the variation of the flow rate between the top and side blow-off jets.

Another nozzle was also added to provide assistance to the movement of trays down the out-feed chute.

In terms of health and safety, a gas strut was fitted to the front flap guard to prevent accidental closure and an additional sensor was fitted to prevent the denester cycling with an empty magazine, thus eliminating any possibility of access through the front guard aperture.

Jacob’s also needed its machines to be freely interchangeable between each of the three lines.

This resulted in the development of an out-feed chute with offset delivery, to accommodate an area of restricted width on one side of each line, and the fitment of castors to facilitate mobility.

After the installation of the first machine, Jacob’s took delivery of the remaining two machines, which it installed itself.

The denesters are providing cost savings on the lines, leaving operators free to concentrate on other factory tasks.

View full profile