A Sigma kneader is also known as double arm kneader mixer ,it is a double-blade mixer specially designed for thick, viscous, and sticky materials ,it is the most commonly used kneader mixers in the family as double arm mixers .
The Sigma-shaped blades consists of two mixing blades placed in a ‘w’ shaped horizontal trough .
The two sigma blades rotate toward each other at different speed within the trough to deliver powerful shearing and folding forces ,which result in homogeneous mixing , blend and knead compound materials thoroughly.
When the sigma kneader mixer are built with vacuum capability, stainless steel contact parts, and an integrated cooling system, it becomes an excellent mixing equipment for sensitive material ,which require the environment of purity, consistency, and precision.
Key Functions and Advantages of Vacuum Kneader
1. Vacuum System for Air-Free Mixing
When a kneader mixer is equipped with a vacuum-tight mixing chamber, it can remove the left air or gases during the mixing process. This vacuum system function is vital in many aspect, including:
* Preventing bubble formation in final products
* Improving density, smoothness, and mechanical strength
* Enhancing chemical reaction stability in reactive mixtures
* Achieving pharmaceutical or food-grade purity levels
2. Cooling Jacket for Temperature Control
During high-shear kneading process of mixed material, it would create heat quickly . Then the kneader’s integrated water-cooled jacket around the mixing chamber and rotor shafts helps to cool down too high temperature ,it can do many function as follows:
* Keep processing temperatures within target ranges
* Prevent overheating or pre-curing of reactive materials
* Ensure batch-to-batch temperature consistency
* Enhance dispersion of heat-sensitive additives and fillers
We here can tailored various kneader with special requirement ,thus the cooling system can be customized to water, oil, or dual-zone control function ,it just depends on your process requirements for different material.
3. Full Stainless Steel Contact Parts
The sigma kneader mixer can be constructed different material ,including iron ,stainless stee material type of SUS304 or SUS316 . If you require higher needs , the kneader mixer can be customized as SUS316 ,which is higher quality than SUS304 , satisying the highest standards of hygiene and corrosion resistance, it is deal for various industries such as:
* Pharmaceuticals
* Food and nutraceuticals
* Medical rubber and silicone
* Cosmetic pastes and personal care products
4. Sigma Blades for High-Viscosity Compounds
The sigma kneader mixer adopt twin sigma blades ,which are rotating at different speeds to generate intense kneading and folding force. This unique sigma blade can reach some special mixing target ,such as :
* Thorough blending of rubber, putty, resin, adhesives
* Consistent mixing of solid-liquid or solid-paste phases
* Improve pigment dispersion or filler mixed uniformly
* Excellent and fully homogeneity while ensure highly viscous materials
5. Tilting or Bottom Discharge Options
Once the mixing process is complete, the mixed compound material can be discharged easily through some ways, such as hydraulic tilting of the entire chamber or bottom discharge valve with plunger or extrusion screw (optional)
Wide Application of Vacuum Sigma Kneader Mixer
* Chemical Industry ,such as sealants , inks, pigments, resins, and polymer
* RTV and LSR silicone rubber, rubber compounds
* Hot melt adhesives and epoxy resins
* Conductive pastes and battery materials
* Cosmetic creams and gels
* Chewing gum, candy bases, and food pastes
* Lubricating greases and sealing compounds
* Food Industry such as dough, sauces, pastes, chocolate etc
Whether you’re running product development or small-to-medium scale production, our robust vacuum sigma kneader mixer provides perfect mixing solution .