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Muyang MY series Single-screw Extruder


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The extrusion provides for production of many products with great superiority in comparison with other technologies. Because it integrates functions of different equipments in a single process when extruding in most cases, the procedures of mixing, extruding, cutting, cooking, forming and drying process in a certain degree can be carried out at the same time.

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Muyang MY series Single-screw Extruder

  1. 1. Application Machine highlights Technical parameters Extrusion process Production reference Wear parts
  2. 2. Application  Muyang MY series Single-screw Extruder is suitable for both the sinking and floating aquafeed production.  It is also widely used for pet food production.  As for other applications in new fields, please consult Muyang technical experts.
  3. 3. Application  Protruding-end pellet  Flat-end pellet  Oil-rich pellet (17%) Widened Extrusion Capability  Varied in shape and color  Small pellet (Φ 1.0 mm)
  4. 4. Application Machine highlights Technical parameters Extrusion process Production reference Wear parts
  5. 5. Structure highlights  Anti-bridge feeder  Conditioner  Extrusion parts  Water and steam pipeline system  Cutter device  Control system
  6. 6. MY single-screw extruder Conditioner Support bracket Cutter device Principal machine
  7. 7. Anti-bridge feeder  Ensure smooth and precise feeding
  8. 8. Anti-bridge feeder  Anti-bridge design;  Batch type automatic feeding; Material Flow control  Gravimeter for flow detection and variable-frequency motor for flow control together with Feedback Computer the computer, make up a closed-loop circle for feeding control.  Feeding accuracy is 0.1kg. Flow detection Flow settings
  9. 9. SCTZ Conditioner (DDC) Gelatinization (%) & Conditioning time (s) Gelatinization  Optimal paddle configuration to increase material filling level, prolong conditioning time and improve gelatinization of product, which finally contributes to high capacity of extrusion production. % Conditioning time (sec.) Filling level : 0% Filling level : 40% Filling level : 60%
  10. 10. SPTZ Complex Conditioner Steam Water Steam  Combining a one-cylinder conditioner with a DDC conditioner, the SPTZ complex conditioner can improve not only the extrusion capacity but also the quality of extrudates.
  11. 11. Conditioner configured to single-screw extruder SPTZ Complex Conditioner No. Model SCTZ Conditioner (DDC) 1 MY-135 SCTZ 28 2 MY-165 SPTZ 33 3 MY-215 SPTZ 39 4 MY-265 SPTZ 45
  12. 12. Comparison of gelatinization 60 Gelatinization can be around 15% higher 50 gelatinization % Complex conditioner 40 30 DDC conditioner 20 10 0 30 60 90 120 150 180 210 240 conditioning time (sec.) Note: Fresh water fish formulation, conditioner temperature 98 ℃, conditioning water 24%.
  13. 13. Principal machine  L/D=13.1 to increase material retention time in the extruder;  Combining the shearing effects of both screw and shear lock to increase extrusion efficiency and pellet uniformity;  New material applied in the manufacturing of wear parts, which prolongs the service life by 2-3 times and ensure stable production.
  14. 14. Steam and water pipeline system Steam to extruder chamfer Steam to jacket Water drainage Steam impurity drainage Water to jacket condensate drainage
  15. 15. Cutter device Hand wheel Positioning lock Motor Cutter  New cutter device to ensure long time stable running;  A gap usually is generated between cutting knives and the die plate after long time running and wearing. And it should be eliminated in order to obtain good appearance extrudates;  The new cutter device applied can eliminate the gap during production without down-time.
  16. 16. Control system  Muyang automatic control system can simplify operation and eliminate the impact of manual operation;  All production data could be recorded for production management;  Advanced European control elements applied to ensure precise and reliable control;  Available of three control modes: manual, commissioning and automatic.
  17. 17. Single-screw VS. Twin-screw (1) Item Single-screw extruder Twin-screw extruder Remarks Conveying manner Feed mash is convoyed forward by friction and stickiness Feed mash is forced to slid forward Single-screw extruder conveys material mainly by friction, resulting in relatively high wearing and power consumption. Granular of finished pellet >1.5 mm >1.5mm <1.5 mm The product of single-screw extruder is limited because of the non-uniform distributed heat and kneading effect. Ingredient adaptability Common ( limited by moisture content and fat content of ingredients) Wider (incl. ingredient rich of moisture and fat) Single-screw extruder can not adapt to the ingredients that of small friction . Max. fat% ≤10% > 17%(could be up to 25%) Fat helps to reduce friction. Max. H2O% 10% ~ 30% 5% ~ 95% Moisture helps to reduce friction. Heat distribution of feed mash Common Uniform   Steam flashing performance Common Excellent   Shearing force when extruding Strong Common Single screw extruder is of larger backward pressure and shearing force.
  18. 18. Single-screw VS. Twin-screw (2) Item Single-screw extruder Twin-screw extruder Remarks Backflow phenomenon Common Rare Gap between screw and chamber wall of single-screw extruder is larger. Pressure on die Non-uniform and will affect capacity Uniform Material in single-screw extruder is liable to flow back. Product quality, safety and variety Good in quality and safety, but the variety is limited Excellent in quality and safety with a wide variety Twin-screw extruder is of uniform mechanical and thermal effect as well as high moisture content. Running Stable and occasional blockage Stable and reliable Operation Required good experience Ease of operation and control Production pressure of single-screw extruder is more sensitive to the formula. Production Efficiency Common High Twin-screw of good conveying and extruding efficiency. Power consumption Relatively high Relatively low Twin-screw of good conveying and extruding efficiency. Machine price Relatively cheap Relatively expensive Twin-screw is more complicate in construction. Capacity Common Relatively high
  19. 19. Application Machine highlights Technical parameters Extrusion process Production reference Wear parts
  20. 20. Capacity of MY series Single-screw Extruders No. Model Main motor ( kW ) Screw dia. (mm) Pet food ( kg/h ) Floating aquafeed ( kg/h ) Sinking aquafeed ( kg/h ) 1 MY-135 90 135 1600~2500 1600~2500 500~1500 2000~3500 2000~3500 2000~3000 160 3000~6000 3000~6000 2000~4000 250 6000~9000 6000~9000 3000~6000 8000~12000 8000~12000 3000~6000 10000~15000 10000~15000 5500~12000 110 2 3 MY-165 165 MY-215 215 315 4 MY-265 400 265
  21. 21. Capacity & die opening area Floating aquafeed: Die opening area (mm2) Capacity(t/h)=—————————————— 200~250mm2/t · h Sinking aquafeed: Die opening area (mm2) Capacity(t/h)=—————————————— 550~600mm2/t · h
  22. 22. Process parameter control for floating aquafeed production Parameters Single-screw extruder Temperature prior to die discharging 125-135 ℃ Moisture prior to die discharging 25-27% Bulk density after discharge 320~440kg/m3 Moisture of extruded product 21-24% (Flash by 3-4%) Pressure of discharging barrel Floating-sinking knee point 34-37 atmos 480kg/m3
  23. 23. Process parameter control for sinking aquafeed production Parameters Conditioning moisture Conditioning temperature Single-screw extruder 19-23% 80℃ Bulk density after discharge 490~550kg/m3 Moisture of extruded product 22-27% Pressure of discharging barrel Final gelatinization 20-29 atmos 90-95%
  24. 24. Requirements to formulation Materials Floating feed Sinking feed Starch ≥20% ≥10% Oil ≤5% 4%~12% Fat ≤17% (single-screw) _____ Extrusion coefficient 1.8 1.1-1.3 Note that the feed formulation should not contain too much animal protein, especially that for floating aquafeed.
  25. 25. Requirements to formulation Die hold dia.Φ ( mm ) 1.0 Max. granular of ground material ( mm ) 0.1 1.5 0.15 2.0 0.3 2.5 0.5 3.0 0.8 4.0 1.0 5.0 1.2  For aquafeed production, the granular of ground material usually should be controlled at >5.0 1.2 20 mesh (0.85mm), for the production with die hole smaller than 1.5mm, make sure at least 98% material could pass through the 60 mesh sieve.  Fiber in the formulation should be clean away in time to ensure smooth operation, especially for the production of small aquafeed.
  26. 26. Requirements to working condition 1. Environment temperature for normal use is within -10 ~ +40℃; 2. Relative moisture content for normal use is within 30~85%; 3. Altitude for normal use is lower than 1000 m; 4. Keep the room where extruder working clean and ventilated; 5. Keep the extruder far away from corrosive gas, explosive gas and steam; 6.Power supply : refer to motor nameplate ; air pressure ≧0.6Mpa; 7.Keep enough space around the extruder for easy operation, repair and maintenance; 8.Make sure the machine is level. 9.The vibration should not exceed12 mm·s-1 Under other working conditions, please consult Muyang technical experts.
  27. 27. Application Machine highlights Technical parameters Extrusion process Production reference Wear part
  28. 28. Extrusion process After extrusion, drying, coating, cooling and grading, the finished product of expanded aquafeed is featured by controllable density, wide raw material adaptability, good water stability and high feed conversion ratio. See Fig.1~Fig.4, the four common aquafeed extrusion processes. Those shown in Fig1. and Fig.2 are recommended.
  29. 29. Process configuration Extruder No. Item MY135 MY165E MY215 MY215 MY265 1 Main power (kW) 90 160 250 315 400 2 Aquafeed capacity (t/h) 1.5 ~ 2.0 3.0 ~ 6 6.0 ~ 8.0 6.0 ~ 11.0 10.0 ~ 15.0 Fan Steam aspiration system T40No4 N=1.5Kw n=2900rpm 5-48-12No N=3Kw n=2900rpm Cyclone / X55-Φ700 Airlock / GFZY-6 Air pipe dia. (mm) 3 Branch pipe dia. Φ150mm; Manifold pipe dia. Φ200mm Branch pipe dia. Φ200mm; Manifold pipe dia. Φ250mm TDSG50 4 Belt conveyor (high temperature resistance, 80 ~ 90℃, free of oil) TDSG40 5 Dryer MGLZ22/ SKGW150-4 SKGD2000-5 SKGD2000-6 SKGD2000-8 SKGD2400-8 Induced-draft fan 5-48-12No N=7.5kw n=2900rpm 4-72- No N=18.5Kw n=1800rpm 4-79- No N=22Kw n=1800rpm 4-79- No N=30Kw n=1600rpm 4-68No N=55Kw n=1000rpm Cyclone X55-Φ1000 X55-Φ1800 X55-Φ2000 X55-Φ2400 X55-Φ2200x2 Airlock GFZY-8 Air pipe dia. (mm) Φ340 Φ610/Φ800 Φ800/Φ1000 6 Steam exhaust system GFZY-10 Φ400+Φ480/Φ600 Φ480/Φ700
  30. 30. 7 Elevator (high temperature resistance belt, 80 ~ 100℃) TDTGq36/23 TDTGq40/23 TDTGq40/28 TDTGq50/28 TDTGq50/3 2 8 Grading sifter SFJH80X SFJH110x SFJH130x SFJH140x SFJH153x 9 Volume of coating bin 1 ( m3 ) 4 ( m3 ) 6 ( m3 ) 10 Continuous liquid coater SYPL SYPL SYPL 11 Vacuum liquid coater SYPZ90 12 Airlock SLNF16x (SLNF14x(QD)) SLNF22x (SLNF19x(QD)) Fan 5-48-12No N=7.5kw n=2900rpm 4-72ⅡNo N=15kw n=2900rpm Cyclone X55-Φ1000 X55-Φ1400 Airlock GFZY-8 Are pipe dia. (mm) Φ340 13 Aspiratio n system for cooling 14 Grading surge hopper 15 Ultra-fine grading sifter 16 Bagging machine ( belt feeder type ) 3 ( m3 ) SYPL SYPL SYPZ120 SYPZ150 SLNF24x SYPZ200 SLNF28x SLNF32x 4-7ⅡNo N=18.5kw n=2900rpm 4-72 N=30kw n=1800rpm 4-68 N=37kw n=1800rpm X55-Φ1600 X55-Φ1800 X55-Φ2400 X551600x2 Φ700 Φ800 GFZY-10 Φ530 Φ610 Effective volume equal to that of mixer effective volume SXFQ60 ( with 40 mesh screen, capacity up to 3t/h ) SXFQ60 ( with 40 mesh screen, capacity up to 5t/h ) LCS-50-BZ Note: ①Equip an air-draft hood for the aspiration system over the outlet of extruder ; ② A movable chute, which serves as a by-pass for conveying product between extruder and conveyor, should be equipped. The belt conveyor is reversed; ③circulating air system for drying should be equipped according to the operation manual; ④ There should have a straight chute over the dryer with at least 500mm to ensure feeding efficiency.
  31. 31. Process configuration for pneumatic conveying
  32. 32. Application Machine highlights Technical parameters Pelleting process Production reference Wear parts
  33. 33. Production reference Currently, there are over 100 sets of Muyang MY series single-screw extruder stably running in China and around the world. Satisfied customers include CP Group, DaChan Food, Gold Coin, New Hope Group, Tongwei Group, etc. ……
  34. 34. Application Machine highlights Technical parameters Process configuration Production reference Wear parts
  35. 35. Extruding rotor Pressing lock Kneading lock Extruding rotor For MY series single-screw extruder, the screws, pressing locks and kneading locks of extruding rotor are all wear parts.  Usually, the operating life of the Screw extruding screw is about 12,000 tons.
  36. 36. Extruding chamber liner of discharge chamber Liner of middle section chamber Liner of feeding chamber Liner of pressure-relief chamber Wear part Note : For MY series single-screw extruder, all liners (6 sections) for extruding barrel and wear rings in fixed shear locks Fixed shear lock are wear parts.
  37. 37. Discharge assembly Die plate holder Distributing cone Fixed holder Cutter support bracket Venturi element Pressure regulated ring Die plate Die plate assembly
  38. 38. Cutter structure Knife carrier Knife holder Cutter shaft Cutter motor Cutting knife Among above parts, cutting knife is wear part.
  39. 39. Wear parts from Muyang supplier  Reducing motor: SEW, NORD, FLENDER, FALK…  Pneumatic/Hydraulic components: FESTO, SMC, YSC, Spirax Sarco …  Bearing: SKF, NSK, HWL…  Electric components: Honeywell, Omron, Schneider, Schmersal … ……
  40. 40. Thanks for your time!