Manufacturer – 3Sigma
Product – Titanium Dioxide
Case History #115

Replacing a Troublesome Screw Feeder with
A GeoMate™ Loss-in-Weight Batching System
for Titanium Dioxide

Case History - 3Sigma Dry Material Feeders
Border - Tp1
Border - Lt
Border - Rt
Border - Bt1

Background
A Southeastern manufacturer of high grade titanium requires the addition of a very small amount of titanium dioxide into each and every batch produced.  As titanium dioxide is extremely cohesive and adhesive it presents a myriad of dry material handling problems.

Existing Problem
-Reliability Issues.  The customer had been using a Best Equipment brand screw feeder for a number of years.  As the screw rotates in the screw feeder, the friction created causes buildup between the screw and the discharge tube.  Over time this hardens.  A loud screeching noise could be heard every time the feeder started.  Eventually the screw would break or twist up like pretzel inside the screw feeder.
-Inaccuracy.  With every single batch an operator needed to adjust the amount added as the feeder was incapable of meeting their stringent batch accuracy requirements.
  
The Solution
Our local rep firm, Carolina Material Technologies, was asked us to review the existing Best Equipment installation and offer a solution.  Their requirements were:
-Provide an accurate and reliable batching feeder to work with their existing Gain-in-Weight scale and control system.
-The vibratory feeder must batch the precise amount without operator interface.
-The vibratory feeder must operate reliably with minimal maintenance issues.
-Batch range of 0.10 to 1.5 lbs within 30 seconds.

To meet these requirements 3Sigma provided:
-A 6” GeoMate™ dry material vibratory feeder with a 0.5 CF hopper. The unit is manually refilled.
-The MassMate™ hopper has been designed for mass flow with the sized larger than the material’s arching dimension to eliminate flow problems. 
-The vibratory feeder and hopper have both been electro-polished to provide for best flow conditions.
-A local control to interface with our client’s existing control system.

Loss-in-Weight Vibratory Feeder

GeoMate™ Dry Material Feeder
Exterior –Glass Bead Finish
Interior – Electropolished



MassMate™
Mass Flow Hopper
To be Manually Refilled


Seal Skirt to Isolate the
Hopper from the FeedTray



GeoTray™
Dry Material Feed Tray



Electromagnetic Drive

Results
-The first GeoMate™ Dry Material Vibratory Feeder was installed in 2012. 
-The second GeoMate™ Dry Material Vibratory Feeder is awaiting installation.
-The dry material vibratory feeder operates within the customer’s accuracy requirements freeing the operator from constant rework.
-No more squealing from a screw feeder.  No more “pretzeled screws”.  No more maintenance.
-To date the feeder system has met all requirements without any downtime.

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