Explosion-Proof Vacuum Screw Discharge Kneader Mixer

Standard Design（Customizable）: 

Material: SUS 304, 316 or mild steel 

Discharging: Tilting discharging/Screw extruding discharging/Bottom plate 

Heating: Electric heating/Water heating/Oil heating/Steam heating 

Cooling: Water cooling/Jacket cooling

Vacuum: Water-ring vacuum pump/ buffer tank. 

Motor: Explosion proof motor 

Independent Control Panel: Variable speed/ Temperature/Discharging 

Working Volume: 5 to10,000 Cubic Feet (from experiment to production)

Precision Mixing for Energetic Applications: Kneader Mixer

Key Features

• Safety Certification: Explosion-Proof (Ex-Proof) 

• Benefit: Guarantees safe operation in hazardous environments (e.g., handling volatile oxidizers/binders) by eliminating ignition sources.

• Mixing Technology: Sigma Type Blades.

• Benefit: Provides intensive, high-shear, and overlapping kneading action necessary for the uniform dispersion of solid fillers within highly viscous polymer binders.

• Material Quality: SS304 Contact Parts (Mirror Polished).

• Benefit: Ensures superior corrosion resistance, minimizes material adhesion (stickiness), and meets the stringent cleanliness requirements for energetic materials.

• Process Control: Variable Speed Control.

• Benefit: Equipped with a frequency inverter, allowing operators to select precise mixing speeds to manage heat generation and optimize homogenization.

• Homogeneity Assurance: Vacuum Capability.

• Benefit: Essential for drawing out trapped air and volatile components during mixing, preventing critical voids or bubbles in the final propellant grain.

Discharge Method Comparison

Feature	Screw Extrusion Discharge (This Model)	Tilting Discharge
Efficiency	Continuous and controlled output, especially for sticky or viscous materials	Batch discharge, may leave residues
Material Flow	Smooth extrusion through  screw barrel	Relies on gravity, less control
Space Requirement	Compact design, no need for tilting clearance	Requires larger working area for tank rotation
Operator Effort	Easier operation, minimal manual handling	Requires more manual operation
Best for	High-viscosity materials like silicone rubber, adhesives	Medium-viscosity materials, easier to flow

Our Services

LABORATORY TEST In order to be able to demonstrate the advantages and modes of action of our industrial mixing machine with your products, our fully equipped modern laboratory/technical center is at your disposal.

PROFESSIONAL ENGINEER The experienced team of engineers is specialized in the R&D and design of mixers, grinding equipment, and plastic recycling machine.  Karvil explores new technical points constantly to create perfect solutions for customers.

DIRECT FACTORY Karvil factory has a series of strict standard system to control the procurement of raw materials, manufacturing process, in-process inspection, and product inspection, so as to ensure the quality of our products.

Applications

Certifications

F.A.Q.

1. Manufacturer or trading company?

We are a manufacturer with strict production standards in China.

2. Where is your company?

Our company is located in Yantai, Shandong,——Powder Equipment Industry Belt.

3. About your company's visit?

We can pick you up at Qingdao Airport conveniently, and then we can take you to our factory.

4. What is the main market for your company?

Asia and Africa, Australia, America, Europe.

5. Can you provide customized products?

Yes, we have professional engineers to meet your special design needs, so we can provide customized products.

6. What is your delivery time?

It usually takes about 20 to 30 days, the exact time also depends on the type and quantity of the product.

7. About the product warranty?

Usually, we provide a 1-year warranty for the products that have been sold, but we can also provide life-long service when you need it to maintain a long-term relationship with you.

8. What are the payment terms?

T/T, L/C, etc.