1. GUARDIAN ® Gravimetric Batch Blender

2. 2 Function Raw materials are metered by V-shaped, quick opening slide gates into the weigh hopper. When all ingredients have been metered according to the reciepe, a flapper opens and dumps the batch into the mixing chamber A specially designed 3D-mixer homogenizes the material smoothly After mixing the material is delivered to the process While homogenizing one batch, the next batch is metered into the weigh hopper

3. 3 GUARDIAN ® gravimetric batch blender The standard: pearl-blasted stainless steel for all parts with contact to the material

4. 4 Mini-OP operator station Easy-to handle operator‘s surface Easy entering of the reciepes with plausibility check MULTISHOT-Dosing to achieve highest accuracy Access to certain levels by password Alert protocol (last 100 alerts) Inventory data for shift and job for each ingredient PCC Web ® (option) enables communication from any place in the world with standard pc combined with access to the internet

5. 5 Metering of materials The V-shaped metering gates are acting with one dispense cycle. Then they adjust the balance of of the requested weight ammount by „short cycling“ the gate Every batch is exact the same as the previous one. By using the multi-shot principle our gates are able to meter very small amounts of granule with highest accuracy.

6. 6 Mixing the batch High performance 3D-mixer for highest accuracy The mixer reaches the complete mixing chamber  no clerance volume. Adjustable mixing time Controlled dump gate for filling a GRAVITROL ® weigh hopper. Low leve proximity switch. Front door with safety interlock. Nozzle for compressed air for cleaning purposes (option)

7. 7 Mixing the batch Mixing chamber with 3D-agitator mixer and mixing chamber gate. The well engineered 3D-mixer (agitator) ensures the perfect homogeneity ot the blend The mixing chamber gate is closed during homogenisation cycle. This ensures that only homogenised material enters the process

8. 8 Accuracy Result of a test in our laboatory: GUARDIAN ® vs. popular competitor‘s batch blender. Each point represents the percentage of masterbatch in one material sample. 200 samples from each blender were taken to make the study statistically firm. Please focus on the much better standard deviation of our GUARDIAN ® blender.

9. 9 Precision dosing auger for metering regrind material. Steep wall design to avoid bridge building inside the hopper. Different auger diameters in combination with motors of different gear ratios ensure the requested dosing rate. Loading control via proxi-switch (option) GUARDIAN ® with regrind hopper

10. 10 GUARDIAN ® with powder feeder Auger feeder for metering all kinds of powder. The powder element is made of polished stainless steel. Combination of granules with powder and regrind material possible Two motors, one for the bridge breaker inside the hopper and another to run the dosing auger. Both motors are independant from each other. Easy removal of the powder feeder for cleanig and material change.

11. 11 GUARDIAN ® with self cleanign feature Self cleaning is a useful option for all lines with frequent reciepe change. Air nozzels clean the weighing chamber and the mixing chamber until the last pellet is out. By reducing the down-time of a line, the self-cleanign option pays for itself within a short time This self-cleaning option is available for all GUARDIAN ® blenders.

12. 12 Applications GUARDIAN ® WXA050 GUARDIAN ® WXA025

13. 13 Applications GUARDIAN ® off-line as central mixing station GUARDIAN ® mounted on an extruder‘s throat

14. 14 Applications GUARDIAN ® mounted on an injection moulding machine

15. 15 Data recording for preparing a quotation: In this data sheet all necessary data concerning throughput and extruder are caught