JZK Series Double-Stage Vacuum Brick Extruder Unit

INTRODUCTION:   

 Structure and Working Principle

•  Double-Stage Structural Design

    Upper Stage (Mixing and Prepressing Section):

 A twin-shaft mixing device mixes and homogenizes raw materials (with a moisture content of 14%-20%). A sealed auger with variable pitch extrudes the materials to form a sealed mud ring, preventing air backflow. A mud crusher cuts the raw materials into fragments to increase their surface area, and a vacuum pump (with a vacuum degree of ≤ -0.092 MPa) extracts air to enhance the compactness of the raw materials.

  Lower Stage (Extrusion Forming Section):

 A mud pressing plate feeds materials forcibly. The auger gradually increases pressure (up to a maximum of 4.0 MPa) through a variable-pitch design. After being compressed in the mud cylinder, the raw materials are extruded and formed through the die, producing mud strips with a hardness of 3.0-5.0 kg/cm².

• 2. Core Systems

 Vacuum System: A water-ring vacuum pump removes over 90% of the air from the raw materials, reducing bubbles and delamination in green bricks.

 Pneumatic System: A pneumatic clutch controls the start and stop of the upper and lower stages, enabling overload protection and precise speed regulation.

 Wear-Resistant Design: The surface of the auger is spray-welded with wear-resistant alloy (e.g., high-chromium cast iron), boasting a service life of over 30 million standard bricks—4 to 7 times longer than that of ordinary augers.

Main Characteristics：

• Wide applicability to raw materials, reducing the difficulty of crushing and pretreatment.
• Lowers the moisture content of formed green bodies, reducing drying costs.
• Adapts to the extrusion forming of low, medium and high plasticity raw materials, meeting the needs of subsequent raw material adjustment.
• Suitable for both single-firing and double-firing processes, simplifying the process and saving investment.
• Finished products have high compressive strength, high density and can be stacked in more layers.
• Auger rheological extrusion technology enables energy saving, low consumption and high output, facilitating the realization of automated and digital balanced production.
• Vulnerable parts are standardized and serialized, with permanent supply available, eliminating worries about after-sales support.