# Designing a can crusher die

In summary, the conversation discusses the design of a rectangular duct for compressing 30 drinking cans. The main problems being faced are determining the thickness of the metallic plates and the steel plate needed for the hydraulic piston. The total load required is 180KN and the inner dimensions of the duct are 30x30 cm with a clearance of 5mm. The proposed solution involves deriving an equation for combining 3 stresses to determine the maximum stress, similar to pressure vessel design. The shape being discussed is rectangular instead of cylindrical.

Hey there,
We are designing a rectangular duct composed of 4 metallic plates fastened together by bolts(or welded), where we will compress approximately 30 drinking cans, we are facing a problem by determining:
1- The thickness of the metallic plates that form the walls of the duct.
2- The thickness of the steel plate that is fixed to the hydraulic piston which will compress the cans.
To compress 30 cans, we need a total load of 180KN.
The duct's inner dimension are 30x30 cm.
Clearence between the sheet plate and the rectangular duct is about 5mm.

check the drawing for details.
much thanks

#### Attachments

• Hydraulic Can Crusher.png
5.3 KB · Views: 505
Hey there,
We are designing a rectangular duct composed of 4 metallic plates fastened together by bolts(or welded), where we will compress approximately 30 drinking cans, we are facing a problem by determining:
1- The thickness of the metallic plates that form the walls of the duct.
2- The thickness of the steel plate that is fixed to the hydraulic piston which will compress the cans.
To compress 30 cans, we need a total load of 180KN.
The duct's inner dimension are 30x30 cm.
Clearence between the sheet plate and the rectangular duct is about 5mm.

check the drawing for details.
much thanks

OK. So what have you done to solve it so far?

Ok dave, i thought of a method today which goes for deriving an equation for combining 3 stresses to get the maximmum stress, you know our case is similar to pressure vessel design, but the shape we are discussing is rectangular and not cylindrical.
What do you think ?

## 1. What is the purpose of designing a can crusher die?

The purpose of designing a can crusher die is to create a tool that can efficiently and safely crush cans, reducing their size for easier storage and recycling. This can help reduce waste and promote sustainability.

## 2. What are the key factors to consider when designing a can crusher die?

Some of the key factors to consider when designing a can crusher die include the type and size of cans it will be used for, the materials and strength of the die, the mechanism for crushing the cans, and any safety features that need to be incorporated.

## 3. How do you ensure the efficiency of a can crusher die?

Efficiency of a can crusher die can be ensured by conducting thorough testing and optimization. This involves testing the die with different types and sizes of cans, making adjustments as needed to improve its performance.

## 4. What safety precautions should be taken when designing a can crusher die?

Safety is an important aspect of designing a can crusher die. Precautions such as including safety guards and emergency shut-off switches can help prevent accidents. It is also important to use materials that can withstand the pressure and force of crushing cans.

## 5. Are there any alternative designs for a can crusher die?

Yes, there are various designs for can crusher dies, such as manual, electric, and pneumatic. Each design has its own advantages and disadvantages, and the choice may depend on factors such as cost, efficiency, and ease of use.