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Metering Screws Drive Surge Production and Eliminate Waste

 

Metering Screw Conveyors provide surge delivery to downstream equipment, allowing continuous production.  Load cells can be integrated into the metering screw to use the loss-in-weight method for measuring product displacement. Metering Screws deliver and surge the correct quantity of product to the mixers, cookers, or blenders downstream as required by the recipe.

CLEAN SWEEP

The Metering Screw Conveyor is designed with a Clean Sweep Hopper that eliminates waste with a solution that mechanically clears food product between batches.

In the animation, a paddle agitator sweeps the sides of the tub and continually pushes product into the feed screw.

The spin ridge keeps product from barreling, maintaining positive conveyance until the food product is completely unloaded.

DESIGN

Mepaco has engineered Metering Screws up to 6000 lbs. capacity. The screw conveyor delivers metering, formulating and surge applications and handles ground and trim meats, prepared foods, frozen foods, and pet food. Design customization includes:
 

  • Incline up to 35 degrees
  • Load heights range from 72” and 84” for an average 3000 lb. unit
  • Discharge heights vary based on a 20’ screw length and incline angle
  • Screw lengths longer than 20’, are application dependent, and will require a hanger bearing

Contoured covers can be integrated on the screw conveyor, which allows for an increased incline angle, fully contained discharge and reduced footprint.

Processors can realize production efficiencies with options that include:

  • Single or dual screw
  • Screw covers
  • Load Cells
  • Clean in place (CIP) solutions
  • Electropolished food contact surfaces
  • Heating or Cooling Jackets
  • Fixed or variable speed drives

INFEED

A typical floor layout is a DP3000 (Direct Pivot) Dumper feeding the hopper. For discharge heights greater than 120”, custom platforms can provide elevated load height and higher discharge requirements.

While not as common, the HD3000, LD3000 and CD1000 dumpers have also been used to feed the Metering Screw.

Surge loading metering screws used in a formulation system configured side by side often use a reciprocating belt conveyor to deliver product between hoppers, depending on the recipe demand.

DISCHARGE

The discharge chutes on Metering Screws can be static or pivoting. Controls can be programmed to direct chutes to multiple discharge locations.

Mepaco engineers and manufactures many types of Metering Conveyors, from the Clean-Sweep configuration to the Cross-Screw Hopper Design and the conventional center-screw hopper. Our engineering team works with the processor to specify and modify the design to meet the goals of the application.


How to Determine if your Auger / Screw Conveyor is Failing

If you have a transport, incline or metering screw, these conditions are symptoms of a failing auger / screw.

  • The screw is rubbing on the wall of the tub
  • There is a bow or wobble when running
  • The hanger bearings are wearing out prematurely
  • The wear pads are ground down beyond normal wear.
  • The gear box is hot.
  • The drive shaft is worn out prematurely.

Screw conveyors are important to keep product moving between processes, so pay close attention to these systems to stay ahead of maintenance issues. 

After any major incident, contact Mepaco Services to inspect repair. Mepaco Services may be able to make some repairs on site. Welding, straightening, stainless finishing can be performed on site.  However, re-machining a new piece, shaft or remanufacturing a paddle/ribbon, needs to be worked at the factory. 

It is important to assess the life and stress of the augers to make sure that you do not experience down-time. Mepaco Services can provide audits, service contracts or emergency repair to help to prolong the life of screw conveyors.


New Video Animation: A Demonstration of the Articulating Screw Elevator

 

The Mepaco group has expertise in manufacturing screw conveyor systems for many food industries and applications.  The articulating screw conveyor is part of the customizable product offering that includes screw feeders and surge loaders.

In the video, the articulating screw conveyor is animated to demonstrate:

  • Lowering and elevating capabilities for safe and efficient sanitation and maintenance
  • Pivoting capabilities that allow for versatile production possibilities

These articulating conveyors have been designed with different pivot configurations, CIP (clean-in-place) capabilities, pneumatically controlled safety grating and covers, and  electropolished food contact surfaces.

For more information, download Mepaco’s screw conveyor systems brochure.

 


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