Contents
Design Brief ....................................................................................................................................................................... 2
Research ............................................................................................................................................................................ 3
Initial Designs .................................................................................................................................................................. 12
Final Design – Working Drawing ..................................................................................................................................... 17
Final Design – Component List ........................................................................................................................................ 22
Final Design – Exploded Isometric .................................................................................................................................. 26
Final Design – Mechanism .............................................................................................................................................. 30
Final Design – Safety Features ........................................................................................................................................ 34
Final Evaluation and Bibliography ................................................................................................................................... 36
Evaluation ....................................................................................................................................................................... 37
Bibliography .................................................................................................................................................................... 38
Page | 1
, Design Brief
The Brief:
Cornwall Hill College has decided that they would like to become more eco-friendly and do away with single use plastics, as a result, the tuck-shop has
began selling cooldrinks in can. These cans are recyclable. The school wishes to recycle these cans, but they need to first flatten these cans. As this
means that they school needs a device to crush these cans. My goal is to design a easy to use can crusher to be placed next to the recycling bin and
used by all the students of the school to crush the cans.
Specifications Constraints
The can crusher must be a hand powered device that Must be durable
makes use of mechanical advantage to crush the can Must be hand powered
The device must be safe for all students to use Must be easy for all students to use
The device needs to be durable Must be safe for all students to use
The device must be easy to use as the school has Should be made eco-friendly to comply with the
students who are in grade 1 who also need to be schools eco-friendly approach.
able to use it
Can should be released into a container/dustbin so
that young students using it will not be hurt by the
sharp edges of a can.
“Strive for perfection in everything you do. Take the best that exists and make it better. When it does not exist, design it.” - Sir Henry Royce
Page | 2
,Research
Page | 3
, Joining Methods
Type Welding Nuts and Bolts Rivets Adhesive
Picture
Description Process where two pieces of metal are The bolt passes through a hole in the A rivet pilers are used to pull the pin A glue-like substance that is used to join
joined using molten metal which solidifies material and the nut is fastened on the through the rivet and as this happens, the two metatrails together. This creates a
securing the joint permanently in place threaded end of the bolt. rivet is deformed slightly so that it joins the bond and a seal between the two
metals or plastics together materials
Effectiveness Strong joining method that keeps The strong metallic nut and bolt allow it to Relatively weak joining method as the thin Strong joining method if the correct
everything held securely in places for a long take on a lot of strain. It can however material does not allow for much strain. A adhesive is used. The adhesive however
time. Weld will not loosen or deform over loosen over time and will need to be rivet will stay securely in place for a long can wear down over time.
time tightened period of time
Cost and Expensive – A professional is needed for Relatively cheap and widely accessible. Cheap and widely accessible Anyone is able Cheap and widely accessible. Anyone is
Installation installation Anyone is able to install. to install if they have a rivet gun able to use it
Pros Very Strong join Quick and easy to install Can be used with only access to one side of Can be used to join multiple materials (i.e.
Can be very neat – if it is applied correctly. Reliable the material material to steel)
Long-Lasting and will not loosen or deform Can hold a heavy weight Cheap and widely found Quick joining method.
over time. Parts are easy to find and widely available Cheap and easily accessible
in case of a breakage. Very strong join
Cons Permanent - Mistakes cannot be undone. You need access to both sides of the join to Relatively weak – Rivets cannot Acidic adhesive can corrode materials.
It can be untidy if any mistakes occur. install be used with a heavy load Some adhesives are not water repellent
High Cost – a professional is needed to do Maintenance is needed in order to keep Special equipment is needed to install. The The adhesive will wear down as it ages and
the installation. the join secure. equipment is however commercially will need to be replaced or redone after a
available few years of use.
Analysis:
The final design of the can crusher will use welding combined with nuts and bolts. This is due to the fact that these two joining mechanism are
stronger than the other two joining mechanisms. Nuts and Bolts will be the primary joining mechanism as it provides a strong and cheap join.
Welding will be used for joins that require a strong but small join between two pieces of metal
“Engineering is the closest thing to magic that exists in this world” – Elon Musk
Page | 4
Design Brief ....................................................................................................................................................................... 2
Research ............................................................................................................................................................................ 3
Initial Designs .................................................................................................................................................................. 12
Final Design – Working Drawing ..................................................................................................................................... 17
Final Design – Component List ........................................................................................................................................ 22
Final Design – Exploded Isometric .................................................................................................................................. 26
Final Design – Mechanism .............................................................................................................................................. 30
Final Design – Safety Features ........................................................................................................................................ 34
Final Evaluation and Bibliography ................................................................................................................................... 36
Evaluation ....................................................................................................................................................................... 37
Bibliography .................................................................................................................................................................... 38
Page | 1
, Design Brief
The Brief:
Cornwall Hill College has decided that they would like to become more eco-friendly and do away with single use plastics, as a result, the tuck-shop has
began selling cooldrinks in can. These cans are recyclable. The school wishes to recycle these cans, but they need to first flatten these cans. As this
means that they school needs a device to crush these cans. My goal is to design a easy to use can crusher to be placed next to the recycling bin and
used by all the students of the school to crush the cans.
Specifications Constraints
The can crusher must be a hand powered device that Must be durable
makes use of mechanical advantage to crush the can Must be hand powered
The device must be safe for all students to use Must be easy for all students to use
The device needs to be durable Must be safe for all students to use
The device must be easy to use as the school has Should be made eco-friendly to comply with the
students who are in grade 1 who also need to be schools eco-friendly approach.
able to use it
Can should be released into a container/dustbin so
that young students using it will not be hurt by the
sharp edges of a can.
“Strive for perfection in everything you do. Take the best that exists and make it better. When it does not exist, design it.” - Sir Henry Royce
Page | 2
,Research
Page | 3
, Joining Methods
Type Welding Nuts and Bolts Rivets Adhesive
Picture
Description Process where two pieces of metal are The bolt passes through a hole in the A rivet pilers are used to pull the pin A glue-like substance that is used to join
joined using molten metal which solidifies material and the nut is fastened on the through the rivet and as this happens, the two metatrails together. This creates a
securing the joint permanently in place threaded end of the bolt. rivet is deformed slightly so that it joins the bond and a seal between the two
metals or plastics together materials
Effectiveness Strong joining method that keeps The strong metallic nut and bolt allow it to Relatively weak joining method as the thin Strong joining method if the correct
everything held securely in places for a long take on a lot of strain. It can however material does not allow for much strain. A adhesive is used. The adhesive however
time. Weld will not loosen or deform over loosen over time and will need to be rivet will stay securely in place for a long can wear down over time.
time tightened period of time
Cost and Expensive – A professional is needed for Relatively cheap and widely accessible. Cheap and widely accessible Anyone is able Cheap and widely accessible. Anyone is
Installation installation Anyone is able to install. to install if they have a rivet gun able to use it
Pros Very Strong join Quick and easy to install Can be used with only access to one side of Can be used to join multiple materials (i.e.
Can be very neat – if it is applied correctly. Reliable the material material to steel)
Long-Lasting and will not loosen or deform Can hold a heavy weight Cheap and widely found Quick joining method.
over time. Parts are easy to find and widely available Cheap and easily accessible
in case of a breakage. Very strong join
Cons Permanent - Mistakes cannot be undone. You need access to both sides of the join to Relatively weak – Rivets cannot Acidic adhesive can corrode materials.
It can be untidy if any mistakes occur. install be used with a heavy load Some adhesives are not water repellent
High Cost – a professional is needed to do Maintenance is needed in order to keep Special equipment is needed to install. The The adhesive will wear down as it ages and
the installation. the join secure. equipment is however commercially will need to be replaced or redone after a
available few years of use.
Analysis:
The final design of the can crusher will use welding combined with nuts and bolts. This is due to the fact that these two joining mechanism are
stronger than the other two joining mechanisms. Nuts and Bolts will be the primary joining mechanism as it provides a strong and cheap join.
Welding will be used for joins that require a strong but small join between two pieces of metal
“Engineering is the closest thing to magic that exists in this world” – Elon Musk
Page | 4
