A dispersion kneader machine is an ideal equipment for mixing, kneading, crushing, dispersing for low viscosity adhesives to high viscosity material ,including natural rubber, synthetic rubber, recycled rubber ,reclaimed rubber and plastics, foamed plastics, silicone etc. However, the processing characterics respectively for rubber and silicone is different ,thus it need different machine configurations respectively for silicone and rubber material.
For Rubber (e.g., natural rubber, SBR, NBR, EPDM):
As rubber compounding demands intense shear, pressure and temperature control to fully disperse fillers (carbon black, silica), plasticizers, and curatives in a high‑viscosity matrix. Thus internal dispersion kneaders ,also knonw as banbury intensive mixers are suitable for rubber material.
1. Banbury Internal Mixer (Internal Dispersion Kneader)
Banbury mixers are the industry standard for rubber compounding, it offer high‑shear, pressurized mixing in a cooled and closed chamber.
Key Features:
Tilt-type mixing chamber: For easy discharge.
* Hydraulic or pneumatic ram: It provides controlled pressure (often 5–15 MPa) for efficient dispersion and densification of the rubber compound .
* Jacketed Chamber: its jacketed mixing chamber allows precise oil or water cooling, which prevent overheating and scorch during kneading .
* Rotor type: Its twin‐shaft rotors feature with intermeshing or tangential geometry deliver intensive shear to “open up” the rubber polymer and disperse fillers uniformly .
* Tilting or front‑discharge design enables rapid batch unloading and easy cleaning between runs .
* Cooling system: Essential to control temperature during intensive mixing.
For Silicone Rubber (especially LSR or HTV silicone):
For silicone material, especially HTV (High Temperature Vulcanized) silicone, the most suitable dispersion kneader is a Vacuum Dispersion Kneader with specialized features. Here’s what makes it ideal:
Recommended: Vacuum Dispersion Kneader for Silicone
Key Features:
* Vacuum-sealed chamber: Prevents air entrapment, essential for high-purity silicone products.
* Gentle Mixing with Precise Shear: Compared to rubber kneaders, silicone requires less shear to prevent degradation.
It is suitable for soft, sticky silicone that needs uniform additive dispersion
* Temperature control: Accurate jacketed heating (and sometimes cooling) is crucial since silicone is sensitive to thermal profiles.
* Stainless Steel Contact Surfaces : The stainless steel contact chamber is easy to clean (important for color changes or cleanroom conditions),it prevents contamination.
* Jacketed Mixing Chamber
Enables accurate temperature control (usually with oil or water)
,it is crucial for silicone’s heat sensitivity
If you are in the rubber or silicone industries and want to purchase dispersion kneader machine ,welcome to contact with our expert .We here ,provide you high quality mixing machine .
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