|Rotary Continuous Mixers
Liquid Spray Applications
The optional stainless steel spray line with spray head allows for uniform introduction of a liquid additive to the blended material. The internal spray line is accessible from the discharge end of the machine, and is ideally suited for spray coating, de-dusting, perfuming, agglomerating and conditioning of materials. The tumbling and cascading effect produced by internal flights ensures 100 percent uniform distribution of liquids with no overspray.
Internal mixing flights are designed to ensure superior mixing and coating of materials with a short residence time. This design provides an alternate forward- and reverse-pitch mixing action producing "back flow blending" of materials. The flights ensure the blending action in the machine is extremely gentle. The net result of this low rpm rotary continuous design is an active, cascading material effect.
Cleanability has not been sacrificed with this design. The fast and efficient. Custom mixing flights are available for special applications.
Flights are heavy-duty constructed for trouble-free performance and long life, and are easily removed for thorough wash down between production runs product changeovers.
There are no internal restrictions where product could plug or accumulate.a common problem with some competitive mixers. Discreet proportions of liquid may be added to the blend without inhibiting free-flow characteristics of the batch.
Adjustable Drum Incline
The drum angle can be adjusted from 0° to 12° to determine product residence time and throughput rate. The mechanical hand wheel angle adjustment mechanism is located at the discharge end, permitting permanent connection from feeders to the mixer's stationary intake assembly.
Product feed is though a large, stationary, low profile gravity feed inlet chute providing unobstructed high capacity material flow. Chutes may be constructed of either a fabrication or an elbow depending on machine size.
Machines are designed with solid weirs on the discharge end. These act as a "dam" allowing materials to build a 'residence volume' in the machine and overflow the weir. For jobs that require complete automated clean out, an optional discharging weir (shown here) scoops material out of the machine when the drum rotation is reversed.
Dust Free Operation
A unique feature of the Munson Rotary Continuous Blender is its totally enclosed design, preventing dust, fumes or hazardous materials from escaping into the environment. The inlet chute is transitioned directly to the product feed mechanism and the discharge spout is completely covered. Hinged access doors can be provided for product inspection or for spray line maintenance.
Continuously-molded neoprene diaphragms at both the intake and discharge ends are securely retained against the mixing drum, with their other ends attached to respective revolving cylinders, which are firmly positioned by guide rollers. Diaphragms may be specified in FDA-approved materials for sanitary use.
Quick-Opening Access Door
Located in the mid-section of the drum. The door shape follows the contour of the drum body. It is leak-proof and sealed by quick-acting cam locks.
A series of strategically positioned discharge baffles lifts and carries blended product out of the mixing drum. Only a minimal residual amount of product remains in the drum at the conclusion of a production run.
The mixing drum is supported with heavy duty 'trunnion rollers' that ride against precision machined 'trunnion rings'. The rollers are machined from solid Nylon or hardened steel depending on application requirements. This design allows for quick and easy maintenance and the lowest possible horsepower drive.
Horizontal thrust rollers located at the intake end ride against the drum drive sprocket, eliminating lateral movement or shifting of the blending drum. The drum is held in secure alignment with drive components and intake and discharge connections.
Standard materials of construction are heavy-gauge mild steel, abrasion resistant steel, #304 and #316 stainless steel. Special materials of construction such as UHMW liners, epoxy coatings, Duplex stainless steel for ultra-corrosive environments, and other exotic materials are available upon request.
The entire mixer and drive are self-contained on a structural steel support, and only require leveling, connection to power source and feed supply for start-up. Any adjustments to the drive speed control and rotating drum incline are made without disturbing the base structure.
Variable Speed Drive
An integrally mounted drive motor connects through a variable speed drive to a gear reducer, with a roller chain final drive. Drum RPM may be adjusted to compensate for angles of repose and densities of different mixtures.
Most Continuous Blender drives are C-face motor and gear reducer, to a chain and sprocket. All drives supplied are designed to handle materials to 100 pounds per cubic foot.
The cylindrical-shape mixing drum and uniform product flow of the Munson Continuous Blender account for its minimal horsepower requirements. Some eccentrically-shaped competitive mixers rely upon massive, back-and-forth shifting of materials. This results in uneven weight distribution, requiring considerably larger drives. This shifting action can also prove self-defeating, as it may cause dense product to segregate.
Safe, Compact Design
The symmetrical, cylindrical mixing drum complies with Federal safety regulations, an does so without the massive networks of screen meshing and added floor space needed to protect workers from a revolving "crank-shaft" shaped drums of some competitive units.