Open Type Two Roll Rubber Mixing Mill

Open Type Two Roll Rubber Mixing Mill

One-sentence overview: Open Type Two Roll Rubber Mixing Mill is used for rubber mastication, compound mixing and rubber sheet preparation before extrusion, calendering, batch-off cooling or vulcanizing.

Qingdao Running Machine supplies two roll rubber mixing mills for overseas rubber factories, laboratories and production lines. The machine is suitable for natural rubber, synthetic rubber, reclaimed rubber and rubber compounds with additives.

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What This Rubber Mixing Mill Does

A two roll open mill uses two horizontally arranged rolls rotating toward each other. The roll gap can be adjusted so operators can masticate rubber, add compounding ingredients and sheet the material for the next production step.

• Rubber mastication and viscosity reduction
• Rubber compound mixing with additives
• Rubber sheet preparation before extruder, calender, batch off cooler or vulcanizing press
• Laboratory testing, small-batch production or industrial rubber processing depending on model

Typical Applications

• Automobile, motorcycle and bicycle tires and tubes
• Rubber soles, heels, shoes and rain boots
• Rubber sheet, EVA sponge sole and industrial rubber goods
• Rubber rollers, rice rollers, V-belts and conveyor belts
• Automotive rubber parts and general molded rubber products
• Reclaimed rubber processing

Key Features and Buyer Benefits

Feature	Benefit for Buyer
Chilled cast iron rolls with surface hardness 75+/-2 HSD	Designed for wear resistance and stable rubber mixing performance.
Adjustable roll gap	Supports different rubber materials, sheet thicknesses and process requirements.
Forced-feed oil lubrication	Helps reduce maintenance risk for key transmission parts.
Three-stage helical gearbox	Provides stable transmission for continuous rubber processing.
Operator and machine safety protection	Improves daily production safety when operated correctly.
Multiple XK series model options	Allows buyers to select a suitable model for laboratory, small-batch or production use.

Technical Specifications

The following XK series specifications are from existing Running Machine product data. Final model and configuration should be confirmed according to rubber material, target capacity and workshop layout.

Item	Unit	XK-160	XK-250	XK-360	XK-400	XK-450	XK-550	XK-560	XK-660	XK-710
Roll diameter	mm	160	250	360	400	450	550	560-510	660	710
Roll working length	mm	320	620	900	1000	1200	1500	1530	2130	2200
Front roll linear speed	r/min	9	16.3	16.7	19.3	21.8	22.5	27.2	28	31.9
Speed ratio of rolls		1:1.4	1:1.1	1:1.3	1:1.3	1:1.3	1:1.2	1:1.2	1:1.2	1:1.5
Max roll space	mm	4.5	8	10	10	12	16	15	0.5-15	0.5-15
Compound feeding capacity	kg	1-2	10-15	20-25	18-35	50	50-65	50-65	165	190
Motor power	kW	5.5	18.5	30	45	55	110	90	240	280
Dimension L	mm	1133	2722	4200	4920	5405	6646	6270	7280	8185
Dimension W	mm	920	1115	1780	1780	1740	2736	2282	3400	3910
Dimension H	mm	1394	1345	1760	1800	1790	2105	2000	2530	2270
Gross weight	T	~2	~3.2	~6.5	~8	~11.4	~22	~22.5	~49	~51

Optional Configuration and Selection Guide

• select the model according to roll diameter, working length and batch feeding capacity.
• Stock blender can be discussed for more efficient compound turnover during mixing.
• Downstream layout can connect with rubber extruder, rubber calender, batch off cooler or vulcanizing equipment.
• Electrical configuration and workshop layout should be confirmed before quotation.

Production Process

1. Feed rubber into the roll nip and form a continuous band on the front roll.
2. Adjust roll gap according to the compound and target sheet condition.
3. Add required rubber additives according to the buyer''''''''''''''''''''''''''''''''s formulation and process.
4. Repeat cutting, folding and passing through the nip until the compound reaches the required mixing condition.
5. Sheet the compound for extrusion, calendering, batch-off cooling or vulcanizing.

Quality Control Before Delivery

• Check machine structure, rolls, gearbox, lubrication and safety parts.
• Confirm model, motor power and configuration according to the order.
• Run inspection before packing when required by the customer.
• Provide technical communication for installation and operation preparation.

Shipping, Installation and After-sales Support

The machine can be prepared for export packing according to final order requirements. Please provide destination country, workshop voltage, required model and target rubber product, so our engineer can help confirm a suitable configuration.

Frequently Asked Questions

How do I choose the right model?

Please tell us your rubber material, batch capacity, target product and workshop space. We will help compare suitable roll diameter, working length and motor power.

Can this mill work with a rubber kneader?

Yes. In many rubber processing lines, the mixing mill is installed after a rubber kneader and before extruder, calender or vulcanizing equipment.

Can I request technical specifications before ordering?

Yes. Send your required product, material, capacity and delivery schedule. We can provide technical parameters for discussion.

Can the machine be used for laboratory or small-batch testing?

Small XK series models can be discussed for laboratory or small-batch testing depending on material and process requirements.

Send Your Requirements

To get a suitable quotation, please tell us:

• Your country and company name
• The rubber product you want to manufacture
• Material and required capacity
• Preferred model or roll size, if known
• Required delivery time and destination port

Contact Qingdao Running Machine for price, technical specifications and configuration suggestions.