3rd year Project of BSc Engineering

1. Department of Mechanical Engineering
Khulna University of Engineering & Technology
Design and Construction of A Can Crusher Machine
Supervised By: Submitted By:
Dr. Md. Kutub Uddin Asilul Kamal
Professor Roll: 1305021
Khulna University of Engineering & Technology(KUET) 3rd year,1st Term
Presentation on ME 3200

2. Objectives
• To study about different can crusher machine
• To familiarize with different parts of it
• To construct can crusher machine for better
recycling

3. Introduction
• It’s a device which crushes empty metal food containers
▪ It depends on slide crank mechanism
▪ Eco Friendly machining process to protect nature
▪ Making materials reusable through recycling

4. Images of Can Crusher Machines
Fig. Pitman can crusher Fig. Homemade Can Crusher Fig. Wooden Can Crusher

5. Basic Components
➢ Body
➢ Handle/Motor
➢ Crank
➢ Coupler
➢ Ram
Fig . Simple Sketching of Crusher machine

6. Basic Principle
 Based on slide crank mechanism
 Rotary motion is converted into linear motion
 Consists of Connecting rod and piston (ram)
 This allows the ram to crush the can dynamically

7. Working Procedure
 Crank arm is moved (Either by hand or motor) to move the
ram
 Crusher exerts force and then ram crushes the material
 Material is shaped into small volume
 After crushing, then disposed through expel door or duct

8. Basic Design Consideration
•
➢ Force required to crush the Can/Plastic bottles
➢ Considered elements (Material type)
➢ Standard size of cans/plastic bottles

9. CAD Design (Platform : Solidworks ‘13)

10. Different Views
Fig. Top View Fig. Front view

11. Basic Mechanism (Slide Crank)
 transform rotational motion into linear motion by means of a
rotating disc
 rotating disc and the GI pipe attached with connecting rod
 GI pipe will crush the aluminum cans reducing volume
 Can will drop into the blank passage

12. Animation

13. Components
Fig. Disc & Crank Shaft Fig. Galvanized Iron pipe (Ram)

14. Continued……
Fig. Boss Fig. Hollow GI pipe Fig. Cast Iron Plate

15. Continued…
Fig. Sewing Machine Motor (8000 rpm)

16. Final Construction

17. Force & Torque Calculation
For Torque Calculation,
Input Power= Torque * Angular Velocity …………………….(i)
Angular Velocity =
2𝜋∗𝑟𝑝𝑚
60
So, Angular velocity =
2𝜋∗8000
60
= 837.76 rad/sec
From the Model HF6 sewing machine motor, it can provide approximately 87%
efficiency
So, Efficiency =
𝑂𝑢𝑡𝑝𝑢𝑡 𝑃𝑜𝑤𝑒𝑟
𝑖𝑛𝑝𝑢𝑡 𝑝𝑜𝑤𝑒𝑟
Output Power = 0.87 * 150
= 130.5 Watt

18. Continued……
So, Putting all these values in equation (i),
Torque =
𝑂𝑢𝑡𝑝𝑢𝑡 𝑝𝑜𝑤𝑒𝑟
𝐴𝑛𝑔𝑢𝑙𝑎𝑟 𝑣𝑒𝑙𝑜𝑐𝑖𝑡𝑦
=
130.5
837.76
So, Torque = 0.1558 Nm
Now, Toque = Force * Distance from pivot point to moment arm where force acts
Here,
The Distance from pivot point to moment arm = 8 cm = 0.08 m
0.1558. Nm = Force * 0.08 m
Force = 1.9475 N

19. How It Works

20. Future Scope
 can be modified using gearbox motor
 placing the micro controller and sensor instead of
manual operated
 can also be made with pneumatic equipment to run it
with more precision and desired output

21. Conclusion & Future Scope
➢ This device can reduce human fatigue
➢ Make the environment clean and green
➢ Can reduce the can for better recycling
➢ Reuse the smaller volume can product

22. THANKS FOR HAVING UTMOST PATIENCE