Series of Double-stage COEX Spiral Ceramic Extruder

A. Background of the Ceramic Extruder

Advanced ceramics have many advantages such as corrosion resistance, wear resistance and high-temperature resistance, and are widely used in various industries. According to the main components, they mainly include silicon nitride (Si3N4), silicon carbide (SiC), alumina (Al2O3), etc. According to the different structures, they are divided into ceramic tubes, ceramic sheets, ceramic plates, honeycomb ceramics, etc.

The forming process of ceramics is divided into dry pressing forming, extrusion forming and slip casting forming according to the different water content of raw materials. Shanghai OMEGA can provide you with various ceramic production processes, equipment, problem-solving and perfect after-sales service. There are many types of extrusion molding equipment. Below is a brief introduction of one such device.

B. COEX series spiral ceramic (membrane) extruder structural

Our company”s COEX series spiral ceramic (membrane) extruder Based on the digestion of the relevant technologies introduced from Germany and Japan, and the accumulated experience in the practical application of ceramic (membrane) materials with high moisture content in various ceramic membrane factories in China, our company has further optimized and improved the design of several structures including the extruder feeding system, torque transmission system, and vacuum exhaust system between the twin-stage extruders, relying on our nearly 30 years of experience in extruder design and research. These optimizations and improvements have greatly improved the quality of extruded products,reduced extruderenergy consumption, and Improved thecost performance ofceramic extruders completely produced in China. These optimizations and improvements have made the working state of the extruder more reliable and stable, and its overall performance is better than some imported extruders, which has been well received by domestic users.

C. Selection of COEX series spiral ceramic extruder: It can be specially designed and manufactured according to the user's specific materials and requirements for extruded products.

D. Configuration Features of COEX Series Spiral Ceramic (Membrane) Extruder

COEX series spiral ceramic (membrane) extruder provided by our company, the primary pursuit of configuration is high stability and high reliability during the operation of the extruder. Based on this concept, the main configuration features of our COEX series spiral ceramic (Membrane) extruder are as follows:

1. Power system:The high torque variable frequency gear speed regulatingmotors onupper-stage and lower-stage extruders are both equipped with high-end cooling devices,with featuresofcompact design and space saving, encoder integration on the motor fan for easy setting, a perfect braking concept, high motor torque capacity, stability and reliability, and long service life;

2. Torque distribution system: The radial bearings of the designed screw torque distribution box are all made of Japanese NSK brand, the gears are high-speed heavy-duty hardened tooth surface type, and the gear shaft manufacturing material is 20CrNi2MOA, with a controlled hardness of HRC58~62;

3. Feeding system: A martensitic stainless steel twin-screw forced feeding structure that can resist the corrosion of high moisture content inrawmaterials;

4. Double-stagebarrels:External circulating water cooling and temperature control, internal replaceable wear-resistant and corrosion-resistant stainless steel lines inside themodularbarrels;

5. Double-stage screws: Onthe screwdifferent functional areas, there are different screw elements made from different stainless steel with its special hardening ways,for getting extremely wear-resistant and corrosion-resistantfeature,and meanwhile balancing the manufacturing cost of these threaded components to achieve excellent cost-effectiveness. Inside the lower-stage screw there is a cooling system for the soft water circulation, to enhance strict temperature control of extruded materials before molding;

6. Vacuum exhaust system: Adopt world-renowned vacuum pump manufacturingBusch, GermanyBrand nameThe innovative technology of oil-free claw vacuum pump ensures strong, economical, efficient, reliable and quiet operation, with high work efficiency, oil-free, contact-free operation, and no maintenance requiredhigh-end performance;

7. Temperature control system:Adopt a wind-cooled dual-system chiller with compressor mainly imported from Europe, America and Japan, Danfoss and American Eco throttle components, as well as high-efficiency evaporator and condenser,the compressor usedto cool the water at room temperature to a set temperature forcefully, in order to ultimately control the molding temperature of the product by controlling the temperature of each barrel and screw module;

8. Electrical control system: Use a high-end, high-stability and reliable touch screen with a 10-inch window-type display made in China+PLC programmable logic controllerhost machine,The system is precisely controlled to achieve PID tuning linkage control of the double-stage extruder from the main motor of the upper stage extruder to the vacuum pump to the main motor of the lower stage extruder. The operation control function and main configuration of the double-stageextruder control system are as follows:

1）Based on the upper-stage screw speed set on the touch screen, the PLC programmable logic controller controls the frequency converter to drive the upper-stage main motor, achieving interlocking power control for the upper-stage machine;

2）Based on the lower-stage screw speed set on the touch screen, the PLC programmable logic controller controls the frequency converter to drive the lower-stage main motor, achieving interlocking power control for the lower-stage machine;

3）The electrical components of the control cabinet, including contactors, air switches, and solid-state relays, are all made by domestic high-end brands, pursuing stability and reliability of the control system. At the same time, the design has extruder under-voltage protection and warning, pressure protection and warning functions, and protection and warning functions for the working temperature set by the control cabinet itself.

ShanghaiOmega Machinery Co., Ltd. / Chief Engineer Office

Extrusion professional

• Strong designing strength
  We design and manufacture the screws, barrels, and extruders according to customer requirements.
• Rich experience
  We have been in the extrusion industry for decades, and our products are used by prominent companies such as Foxconn.
• Advanced material technologies
  Our PM-HIP processing technology increases the material density and reduces casting defects. The new design of an aluminum alloy clad layer on SiC ceramic allows the extruder to work, even in harsh conditions.

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