Coffee Hulling and grading machine

1. Purpose: To hurl (propel) coffee beans at controlled speeds and angles for separation based on density, size, and defects. 

Process Stages:
            1. Feeding & Pre-cleaning – Removal of large debris, stones, and dust. 
            2  Hurling Chamber – Beans are propelled against an airflow or adjustable baffles.
            3. Grading/Separation – Separation by density, size..
            4. Collection Hoppers – Separate outlets for graded beans and rejects. 

Key Technical Specifications 

1. Throughput: 4,000 kg/hour 
2. Power Supply: 380–480V, 3-phase, 50/60 Hz 
3. Airflow System: Adjustable fan/blower, capable of 5,000–8,000 m³/h 
4. Hurling Mechanism: 
5. Adjustable rotor speed: 200–800 rpm 
6. Variable throw angle and velocity 
7. Grading System: 
8. Multi-stage sieves (perforated screens) 
9. Construction Material: 
10. Contact parts: Food-grade material 
11. Frame: Powder-coated carbon steel 
12. Noise Level: < 85 dB(A) at 1 meter 
13. Dimensional & Layout Requirements 
14. Footprint: approx. ~ 3.5 m (L) × 2.5 m (W) × 3.0 m (H) 
15. Feed Hopper Capacity: 1,000–1,500 kg (15–20 minutes buffer) 
16. Outlet Ports: Minimum 4 grades + 1 reject outlet 
17. Access Doors: For inspection, cleaning, and screen changes .
18. Control & Automation 
19. Control Panel: 
20. Adjustable Parameters: 
21. Feed rate 
22. Rotor speed 
23. Airflow velocity 
24. Screen angles/vibration intensity 
25. Safety Features: Emergency stops, motor overload protection, safety interlocks on access points 
26. Operational Requirements 
27. Dust Extraction: Integrated cyclone or connection to central dust collection 
28. Performance Metrics 
29. Separation Efficiency: > 95% for density/size grading 
30. Bean Damage: < 0.5% broken/cracked beans 
31. Yield Loss: < 2% to reject stream 
32. Uptime: > 95% in continuous operation 
33. Deliverables 
34. Machine with all electrical and pneumatic connections 
35. User manual and maintenance guide 
36. Installation, Training, and Commissioning 
37. Includes setup of the machine, calibration, and initial testing 
38. All necessary installation materials and tools should be provided 
39. Training: 
40. Comprehensive training program for operators and maintenance staff 
41. Includes machine operation, safety protocols, troubleshooting, and maintenance 
42. Training materials and manuals provided 
43. Full commissioning service to ensure the machine is operating at optimal performance 
44. Includes fine-tuning of settings for specific bean types and conditions 
45. Pre-Hulling Cleaning System: Module for removing impurities before hulling 
46. Customization: Customizable settings for different bean types and conditions 
47. Warranty: 1-2 years (depending on manufacturer), with options for extension 
48. Support: on call, on-site technician support, training programs 
49. Spare Parts: should be Readily available spare parts for maintenance and repair 
50. Compliance: Meets international safety and quality standards.