About

About the Dryers

With 5 sizes, we can cover almost all of your drying requirements. From our model 5 (only 18″ in height) to our model 50 (up to 150 lbs/hr) we can ensure the optimum drying efficiency for virtually all your applications.
Eliminates hours of pre drying!
The compact Cactus Super Dryer mounts directly onto the molding machine replacing the conventional hopper. It warms up with the molding machine and starts processing immediately, and continuously. Hours of pre drying are eliminated.
Cut energy consumption dramatically
The faster more efficient drying process of the Super Dryer cuts energy use by as much as 80% compared with conventional dehumidifying dryers. That means substantial savings. Compact low maintenance design Super Dryers have no moving parts to wear out. Nothing to adjust and service. No motors or blowers to wear out. Since no desiccant is required, regeneration is unnecessary. And the Super Dryer disassembles quickly for easy cleaning.Fully backed with our “Performance Guarantee”

We are so confident in our ability to dry your material, the Super Dryer is sold with our performance guarantee. Provided it is sized properly for your application, should the Cactus not dry it, we’ll take it back!

Principle of Operation

The Cactus dryer is mounted directly on the feed throat of the molding machine. A hopper or loader is mounted to the top of the dryer to provide a continuous supply of resin to the dryer. The resin is supplied directly from the bag, barrel or gaylord and does not require pre-drying.

In operation the plastic resin feeds continuously from the hopper (1) into the throat (2) and down through the body (3) of the dryer. The resin is heated by conduction and radiated heat at this stage. The heat is supplied by electric heater bands (4) mounted on the body. Heat is precisely controlled by a closed loop P.I.D. temperature controller (5). Simultaneously a partial vacuum is generated inside the body of the dryer. The vacuum is generated by a compressed air powered venturi (6). The fast heating cause’s moisture trapped within the plastic pellet to be forced to the pellet surface. This moisture is carried away by air. Ambient air enters through an inlet (7) in the lower flange (8), passes over the heater bands, through slots in the body (9) across the plastic resin, picking up the moisture, then, exits via the filter basket (10) and though the venturi to the atmosphere. By the time plastic resin is processed though the body of the dryer and down in the screw of the molding machine, most of the moisture has been removed. Should any remain, the action of the screw causes it to vaporize in the rear zone. These vapors are extracted by the extension tube (11) and out through the venturi.

As a result, all moisture is removed before plasticization and dry resin is injected into the mold.

 

Download PDF