For a dried fruit production line, "Screw Type" mixers are primarily used for gentle blending and seasoning/salting. Because dried fruits (raisins, cranberries, apricots) are often sticky or delicate, the machine must balance thorough mixing with a "low-shear" action to prevent bruising or mashing the fruit.

There are two main configurations for screw mixers in this industry:

1. Horizontal Screw (Seasoning/Salt Mixer)

This is the most common for snacks. It features a horizontal U-shaped trough with a central shaft and a helical screw (often called a Ribbon Mixer if it has double ribbons).

• Function: Evenly distributes salt, sugar, or preservatives onto the surface of the dried fruit.
• Capacity: Typically ranges from 60 kg/hr to 500 kg/hr.
• Key Detail: Often equipped with a Liquid Spray System (atomizing nozzles). Since salt doesn't stick well to dry fruit, the screw flips the fruit while a fine mist of oil or glycerin is sprayed to act as a "glue" for the seasoning.