Large Drop-Door Internal Mixer

The Large Drop-Door Internal Mixer (Banbury type) is a heavy-duty closed rubber compounding system designed for high-efficiency mixing of elastomers, fillers, and chemical additives. As a professional manufacturer, supplier, and factory in China, Xinzhe Blades integrates wear-resistant rotor engineering with advanced mixing chamber design to support modern rubber and polymer production lines.

This equipment is widely used in tire production, recycled rubber processing, silicone compounding, and industrial polymer modification.

What Is a Large Drop-Door Internal Mixer?

A Large Drop-Door Internal Mixer is a sealed, high-pressure, batch-type mixing machine used for the plasticization and dispersion of rubber compounds.

It performs three core processes in one sealed chamber:

· Mastication of raw rubber

· Dispersion of carbon black, fillers, and additives

· Uniform compounding and mixing of formulations

Unlike open mixing mills, this system operates in a fully enclosed pressure-controlled chamber, ensuring:

· No dust leakage

· Higher mixing uniformity

· Reduced material waste

· Faster production cycles

Core Process Advantage:

Closed high-pressure mixing + hydraulic bottom discharge system + Xinzhe wear-resistant rotor technology = efficient, clean, and stable rubber compounding line

Industrial Function

A Large Drop-Door Internal Mixer is a sealed, high-pressure batch mixing machine used to process raw rubber into uniformly dispersed compounds.

Unlike open mills, this system completes mixing inside a fully enclosed pressure chamber, enabling:

· Intensive shear dispersion

· Uniform filler distribution

· Dust-free production environment

· Higher compounding efficiency

The system integrates a hydraulic ram and bottom discharge structure, ensuring stable operation in continuous industrial environments.

Engineering Advantages of Xinzhe Blades Mixer Technology

High-Wear Rotor & Liner System

All key components in this Large Drop-Door Internal Mixer use Xinzhe-developed carbide-enhanced alloy materials.

Through vacuum heat treatment and tungsten carbide surfacing, rotor lifespan is significantly extended, especially in:

· High-carbon black compounds

· Recycled rubber with impurities

· Heavy-duty tire production lines

Service life is typically 2–3 times longer than standard cast iron systems.

Closed High-Pressure Mixing Performance

The sealed chamber applies constant hydraulic pressure through a floating ram system.

Benefits include:

· Improved dispersion consistency

· Reduced material loss

· No powder leakage

· Higher raw material utilization (+8% to +12%) 

Heavy-Duty Continuous Production Design

Available capacities: 55L / 75L / 110L / 150L / customized 200L.

The reinforced steel frame and high-torque gearbox allow the Large Drop-Door Internal Mixer to operate continuously in 24-hour production lines.

Typical throughput can reach up to 2.8 tons/hour depending on formulation.

Advanced Thermal Control System

A dual-layer jacket structure supports water cooling and thermal oil heating.

This ensures stable mixing conditions for:

· Natural rubber

· NBR / EPDM

· Silicone rubber

· Recycled elastomers

The system prevents overheating, scorch risk, and inconsistent batch quality.

Hydraulic Bottom Discharge System

The drop-door design enables fast unloading with a 140° tilting structure.

Key benefits:

· Faster discharge cycle

· Minimal residual material

· Improved production efficiency

· Reduced downtime between batches

PLC Intelligent Control Platform

The integrated PLC system allows operators to manage:

· Mixing time

· Rotor speed

· Temperature profile

· Pressure control

· Recipe storage (100+ formulas)

This reduces operator dependency and improves repeatability across production batches.

Technical Specifications

Application Industries

· Tire manufacturing plants

· Rubber recycling production lines

· Automotive sealing component factories

· Silicone and elastomer processing plants

· Plastic modification and compounding industries

Typical Production Scenarios

· High-volume tire compound mixing

· Recycled rubber regeneration processing

· Precision NBR sealing material production

· Clean silicone rubber compounding

Quality Assurance & Manufacturing Standards

As a certified manufacturer, supplier, and factory in China, Xinzhe Blades implements strict production control across all Large Drop-Door Internal Mixer systems.

Quality control includes:

· ISO 9001 certified production system

· CE-compliant export machinery design

· 72-hour continuous load testing

· Rotor hardness and wear resistance inspection

· Full traceability of key components

Each rotor and liner is assigned a unique serial number for lifecycle tracking.

Why Choose Xinzhe Blades Large Drop-Door Internal Mixer?

Installation & After-Sales Support

· Remote installation guidance via video

· On-site engineering support for large systems

· Operator training included

· 24-hour technical response system

· 48-hour overseas service dispatch capability (regional support)

Technical documentation includes:

· Operation manual

· Maintenance guide

· Parameter recipe library

· Fault troubleshooting videos

Packaging & Global Delivery

Prepared for international transport with:

· Anti-corrosion wrapping

· Reinforced wooden crate packaging

· Independent protection for rotors and liners

· Export-grade logistics compliance

Delivery time:

· Standard models: 3–7 working days

· Customized models: 7–15 working days

Global Market Experience

Xinzhe Blades supplies rubber processing systems and wear parts to:

· China industrial manufacturing clusters

· Southeast Asia tire production plants

· Middle East polymer processing zones

· South Asia recycling industries

The company supports over 500+ industrial mixing and compounding installations worldwide.

Frequently Asked Questions (FAQ)

Q1: Can the Large Drop-Door Internal Mixer process recycled rubber with impurities?

Yes. The carbide rotor system is engineered for high-wear and contaminated rubber materials.

Q2: Is secondary mixing required?

Most compounds achieve full dispersion in a single mixing cycle.

Q3: What is the output of a 110L system?

Approximately 1.8–2.2 tons per hour depending on formulation.

Q4: Can it be integrated into a full production line?

Yes. It can connect with cutting and downstream processing equipment for full automation.

Q5: Is factory inspection supported?

Yes. Customers can test materials before purchase at the factory.

Q6: Does it meet environmental requirements?

Yes. The sealed structure ensures dust-free and compliant operation.

Custom Engineering Options

· Ultra-large 200L capacity design

· Explosion-proof electrical systems

· Silicone-specific high-temperature models

· Overseas voltage customization

· Automated feeding systems

Xinzhe Blades - Industrial Rubber Mixing Equipment Manufacturer, Supplier & Factory in China

Xinzhe Blades combines wear-resistant blade engineering and industrial mixing system manufacturing to deliver stable, high-performance solutions for global rubber industries.

We focus on:

Precision engineering | Long service life | Stable production | Fast delivery | Industrial reliability