LZ-7000L Open Dual Shaft Mixer without Hydraulics

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It's a short video of LZ-7000L open dual shaft mixer testing by water. The machine was designed for a customer in La Mirada, USA to make viscous emulsions.

There's a combination of slow anchor stirrer and high speed homogenizer. Load cells are equipped to measure the weight of product inside the machine.

You can find more details of LZ series of twin shaft mixer here:

What is oepn dual shaft mixer?
LZ twin shaft mixer with hydraulics is a multi functional mixer for the production of viscous pastes and suspensions in the cosmetic, pharmaceutical, food and chemical industries. Compared with normal LZ vacuum dual shaft mixer, hydraulic lifting system has more advantages of easy cleaning and maintenance. It’s quite suitable for making different pastes in chemical industry.

What is dual-shaft mixer with hydraulics made of?
LZ vacuum dual shaft mixer with hydraulics is generally made of vacuum mixing tank, vacuum system, hydraulic lifting system, heating and cooling system, temperature control system, electrical control panel etc.

The mixing tank combines in a single vessel one low speed anchor agitator and one high speed dispersers or batch mixers or combination of disperser and homogenizer.

Normally, this agitator is top installed at the center of the vessel for slow speed mixing and the high speed dispersers or top entry batch homogenizers are installed in the room between the shaft and outside wings of the anchor mixer.

How does open double shaft mixer work?
During the mixing operation, the outer anchor agitator rotates clockwise slowly. With the attached Teflon blades, the materials are scraped off the mixing tank wall and move upwards so they won’t always stick to the wall and burn.

At the same time the two fixed impellers keep still and give the materials a counterforce and drive the cream downward into the high speed homogenizing and emulsifying zone. The cream goes through the holes on the paddles and increases mixing effect.

Because of the two opposite forces by fixed impellers and wall scraper, the cream rolls over the vessel from top to bottom and back to top repeatedly. When the cream is completely mixed, the heat from the jacket is quickly transferred to every part through the inside wall.

The heart of vacuum homogenizing equipment is rotor stator homogenizer (or called emulsifier) which consists of one three-layer toothed rotor and one two-layer toothed stator. The design is different from the homogenizer in RS series production vacuum emulsification mixer and is much better.

The rotor is directly connected with homogenizing motor by flanges. The ABB or Siemens motor rotates at the speed of 3000rpm and drives the rotor to rotate at high speed producing strong suction force.

The materials go into the rotor from top opening of the homogenizer and are cut, sheared, emulsified and homogenized through the shear gap between the rotor and stator. Then they’re accelerated to jet out through the pipeline along the tangent of the rotor. The cream runs inside the external circulation pipe and goes back to mixing tank for the slow mixing or another emulsification and homogenization.

The above two types of slow and high forces repeat and repeat. And the cream circulates through the pipeline and is completely mixed, dispersed, emulsified and homogenized.

Key features of open dual-shaft mixer without hydraulics
Complete process of mixing, dispersing, emulsifying, homogenizing, vacuum, heating and cooling in one unit
Working capacity from 3L to 30L
Suitable for cream and emulsion of 10,000~100,000cps viscosity
Perfect particle size of 2 micrometers and evenly distributed
External emulsifying and homogenizing by vertical type inline homogenizer with pipes
Shorter batch time compared with RS series vacuum emulsifying mixer
Cooling system for mechanic seal inside the homogenizer for longer homogenizing time
The homogenizer also works as a transfer pump for discharging finished product
Contra mixing system of fixed impellers with holes and wall scraper
Outer anchor agitator has pipe design for enhanced mixing and good appearance
Variable speed for homogenizer and agitator
Oil hydraulic lifting system for easy cleaning and maintenance
Double jackets for heating and cooling
Different jacket designs available for steam and electric heating
Double temperature probes and controllers for electrical heating in main vacuum homogenizing machine
All contact parts are made of SS316L and mirror polished
Spray ball is equipped to connect to customer’s CIP system
Push buttons control panel for easy operation
Power supply of 380V, 50Hz, 3 Phase

Applications of open two shaft mixer
Cosmetics & Toiletries: cream, lotion, wax, mascara, gel, toothpaste
Pharmaceuticals: ointment, dental composite, syrup, injection
Food: mayonnaise, dressing, jam, butter, margarine, wasabi
Chemicals: polyester, synthetic fiber, shoe cream