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Low Price Rubber Open Mill / Rubber Mixing Mill Customized To Different Sizes
Our rubber mixing mill with 450mm roller diameter is a versatile and reliable rubber processing equipment designed for various industrial applications.
Machine Structure & Components
Roller: Core component with 450mm diameter working surface, featuring hollow structure for heating/cooling operations and specially treated high-hardness, wear-resistant surface.
Frame: Welded steel structure providing high strength and rigidity to support and fix all components, ensuring overall stability.
Transmission System: Efficient power transfer from motor to rollers using gear transmission for smooth operation and high efficiency.
Gap Adjustment: Worm gear or hydraulic adjustment system for precise control of roller spacing to meet different processing requirements.
Safety Features: Emergency brake system with quick-stop functionality and emergency stop button for operator protection.
Temperature Control: Electric or steam heating with water cooling capability to maintain optimal processing temperatures.
Working Principle
The mixing mill operates with two counter-rotating rollers at different linear speeds. Rubber material is fed into the roller gap where it undergoes strong shearing and extrusion forces. This mechanical action breaks molecular chains and distributes components evenly, achieving thorough plasticization and mixing through repeated processing cycles.
Performance Specifications
Roller Linear Speed: Front roller 18-25m/min (varies by manufacturer)
Speed Ratio: Front to rear roller ratio approximately 1:1.27
Batch Capacity: 25-50kg per cycle (depending on rubber type and formula)
Motor Power: 45-75kW driving motor for optimal working capacity
Applications
Rubber plasticization to reduce molecular weight and increase processability
Rubber mixing for uniform dispersion of compounding agents (carbon black, sulfur, accelerators)
Hot refining to improve rubber fluidity and temperature uniformity
Rubber sheeting for producing consistent thickness rubber sheets
Advantages & Limitations
Key Benefits:
Simple operation with minimal training requirements
Strong applicability for various rubber types and formulas
Open structure allows direct process observation and adjustment
Considerations:
Manual material handling requires operator effort
Working environment may include dust and exhaust emissions
Production efficiency lower compared to internal mixers
Technical Parameters
Model
XK-160
XK-250
XK-360
XK-400
Roller Diameter (mm)
160
250
360
400
Roller Length (mm)
320
620
900
1000
Front Roll Linear Speed (m/min)
9
15.1
16.25
18.65
Friction Ratio
1:1.35
1:1.1
1:1.25
1:1.27
Batch Capacity (kg)
1-2
10-15
20-25
18-35
Driving Motor (kW)
5.5
18.5
30
37
Machine Size (mm)
1380×860×1320
3400×1350×1500
3940×1780×1740
4200×1850×1870
Weight (kg)
1000
3500
5600
7600
Model
XK-450
XK-550
XK-560
Roller Diameter (mm)
450
550
560/510
Roller Working Length (mm)
1200
1500
1500
Front Roll Linear Speed (m/min)
24.5
27.94
27.87
Friction Ratio
1:1.27
1:1.22
1:1.2
Motor (kW)
55
110
90
Batch Capacity (kg)
25-50
50-60
50-60
Machine Size (mm)
5200×2380×1770
5900×2680×2080
6500×2300×2000
Machine Weight (kg)
12000
27000
19500
Safety Operating Procedures
Pre-Startup Preparation:
Inspect all equipment components for normal condition
Verify electrical system functionality and instrument accuracy
Clear work area debris and ensure clean environment
Adjust roller spacing according to process requirements
Wear appropriate personal protective equipment
Startup Operation:
Ensure no personnel or obstacles near equipment before starting
Start main motor gradually and monitor for normal operation
Add rubber materials according to process specifications after stable operation
During Operation:
Maintain safe positioning - never place hands or body parts in roller gap
Add materials evenly and appropriately to avoid equipment overload
Continuously monitor rubber mixing and stop immediately if abnormalities occur
No maintenance or adjustments during equipment operation
Use emergency stop button immediately in case of emergencies
Shutdown Procedure:
Stop material addition after mixing completion
Discharge all rubber from rollers before stopping main motor
Shut down electrical system and clean equipment/workspace
Perform daily maintenance including lubrication and cleaning
Additional Safety Requirements:
Only trained personnel permitted to operate equipment
No unauthorized personnel near operating equipment
Regular equipment inspection and maintenance for optimal condition
Strict adherence to operating procedures and safety regulations
