Lab Type Disperser
Cat:High Speed Disperser
The lab-type disperser is a device specially designed for laboratory environments, which combines the functions of dispersion and mixing and is especi...
See DetailsKneading Machine is an irreplaceable important equipment in the mixing, dispersion, and reaction of high viscosity materials. Its core component, the Kneading Blade, directly determines the mixing efficiency, distribution uniformity, energy consumption and product consistency of the material. Different types of stir paddles are designed for different material characteristics and process requirements. This article will systematically introduce the common stir paddle structure forms and application scenarios in Kneading Machine.
Z-Blade
The Z-type paddle is one of the most classic stirring forms in the Kneading Machine. It consists of two blades with a shaped letter "Z" and is installed intertwined along the horizontal axis, forming a strong shear force during rotation.
Features:
Efficient stirring and forced mixing
Suitable for handling high viscosity and high elastic materials
Can form violent kneading action to improve the dispersion effect of filler
application:
Rubber matrix, silicone, sealant
Polymer composite materials
Magnetic slurry, ceramic powder mixture
advantage:
Strong shear force, fast mixing speed
Compact structure, suitable for vacuum sealing environments
shortcoming:
Local heat accumulation is obvious, and a good cooling system is required
Not suitable for thermally sensitive liquid materials
Sigma type stirring paddle (Σ-Blade)
Sigma paddles, also known as Σ-type blades, belong to the deformed Z-type structure. The two paddles are asymmetrical in shape, one paddle is long and wide, and the other paddle is short and thin, with a larger contact area and a softer mixing curve.
Features:
Strong shearing and soft mixing
More suitable for slow kneading of thermally sensitive or reactive materials
application:
Dough, syrup, pectin products in the food industry
Ointment and gel matrix in the pharmaceutical industry
Hot melt adhesive, thermally conductive silicone grease and other materials that are easy to heat up
advantage:
Coordinate the shearing and folding movements, making the mix more evenly
It can reduce the heating rate of materials and reduce the risk of degradation
shortcoming:
Efficiency is slightly lower than that of Z-type paddle
High torque requirements for the drive motor
Double-Sigma Blade
The dual Sigma paddle is a combination of two symmetrically mounted Sigma-type blades commonly used in large horizontal Kneading Machines. The structures cooperate with each other to form a double kneading force field.
Features:
At the same time, it realizes triple mixing effects of shear, folding and pushing
The material movement trajectory is more complex and the mixing uniformity is higher
application:
Lithium battery slurry (NMP system, nano carbon black dispersion)
High viscosity resin + filler mix (such as epoxy system)
Industrial explosives mud and heavy binder system
advantage:
Strong handling capacity of viscoelastic materials
Can withstand higher material viscosity loads
shortcoming:
High requirements for paddle clearance control, high processing difficulty
Relatively high maintenance costs
Spiral Blade
The spiral propeller adopts a spiral propulsion structure to push materials axially to achieve spiral mixing. This structure is more commonly used in medium to medium and high viscosity systems.
Features:
Dual effect of screw conveying + shear mixing
Suitable for large volume and low shear requirements
application:
Oils, creams and cosmetics
High syrup, nut mixtures in the food industry
Biomaterial pretreatment system
advantage:
Smooth material push, fast material update speed
Suitable for continuous mixing process
shortcoming:
Weak shear capability than Z type and Sigma type
Not suitable for materials with extremely high viscosity
Paddle Type / Pin-Type
Gear paddles or nail-tooth stirring paddles are composed of several nail-like protrusions and are often used in special high-shear mixing scenarios. Especially suitable for materials that are shear-sensitive, easy to bubble and require microscopic uniformity.
Features:
Can break up the reunion in a short time
Suitable for dispersing nanoparticles and fillers
application:
Highly conductive carbon slurry, fluoride slurry
High-performance ceramic dispersion system
Optical adhesive material
advantage:
High micro mixing uniformity
Able to achieve particle size level homogenization
shortcoming:
High energy consumption and strong mechanical impact
Equipment wear accelerated
Moon-Shaped Blade
The structure of the moon-fishing paddle is similar to the half-moon type, focusing on scraping wall mixing and material circulation and reflux. It is mainly used in hybrid systems with severe high residue and high sticky wall problems.
Features:
Improve material self-cleaning ability
Reduce material waste and improve yield
application:
High-cost reactive colloid
Preparation of biological agents and nanoliquids
Syrup and high viscosity sauce body in the food industry
advantage:
Avoid blind spots and improve container utilization
Effectively reduce material replacement and cleaning time
shortcoming:
Not strong shear force, average mixing rate
High structural processing accuracy requirements
Composite Kneader Blade
The composite paddle combines the structural characteristics of Z-type, Sigma-type and propeller, and is a highly customized design. Usually used in multifunctional mixing equipment to meet multiple process needs such as continuous, batch, and reaction.
Features:
Multi-purpose one machine, adapt to complex formula systems
You can customize the paddle shape, speed, angle and installation method as needed
application:
Polyurethane, epoxy, fluorosilicon materials
Multiphase reaction system (liquid-solid-gas)
Special synthetic materials or scientific research-level pilot equipment
advantage:
High adaptability, comprehensive functions
Fully automatic control can be achieved in combination with PLC system
shortcoming:
High manufacturing cost
Maintenance and commissioning requirements are professional
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