DTE Flashcards
Oak characteristics
exceedingly strong, heavy and durable. It is an attractive light colour with a prominent grain and is resistant to fungal attack, thanks to its dense constitution and long-living nature, which must equip the tree for its long lifetime.
Oaks use in construction
When used to form the frame of a building, Oak, is easy and quick to work with allowing you to easily put your structure together.
Advantages of rotational moulding
Low costs, large parts can be made, different colours can easily be used, both symmetrical and asymmetrical shapes, one piece moulds are possible to be made
Injection moulding compared to rotational moulding
Fast and efficient production, low scrap rates, design flexibility, high output production, large material choice compared to rotational moulding
Advantages of anodising compared to painting
Anodising is less expensive, anodising provides corrosion resistance, natural metallic finish, no risk of adhesion failure
Advantages and performance characteristics of ABS
ABS offers a good balance of impact, heat, chemical and abrasion resistance, dimensional stability, tensile strength, surface hardness, rigidity and electrical characteristics
Advantages of metal die casting for high production quantities
High-speed production – Die casting provides complex shapes within closer tolerances than many other mass production processes. Little or no machining is required and thousands of identical castings can be produced before additional tooling is required.
6 Rs of sustainability
Repair, reuse, refuse, recycle, rethink, reduce
What is repair
- Can the product be repaired easily
- Can it be repaired easily
- Can parts be replaced, not the whole product becoming unusable
What is reuse
- Can the product be reused in a different way to extend its life
- Can parts be reused
- Is it easy to dismantle for parts to be reused
What is refuse
- Refuse to design a product that isn’t needed
- Refuse to use materials that aren’t recyclable
- If the product isn’t sustainable will people refuse to buy it
What is reduce
- Can you reduce the amount of material used
- Can you reduce the energy used for manufacture
- Can you reduce the waste and packaging
What is rethink
- Is the product really needed
- Can you rethink the product so it lasts longer
- Can you redesign the product do it is easier to recycle
What is recycle
- Can you use recycled materials
- Can you use materials that can be recycled after use
- Can you design a product that is easily recycled
What is rotational moulding
A process used mainly to manufacture hollow shape product, such as football, road cones, kayaks and storage tanks.
Moulds can be made from a few different materials: cast aluminium alloy, mild steel sheet, cast beryllium copper and electro formed copper nickel.
90% of the material used is polyethylene a polymer that is very versatile.
Advantages:
- Low costs
- Very large parts can be made
- Easy colour and resin
- Easy mild changes
- Both symmetrical and asymmetrical products can be made
- One piece moulds are possible to make
- Mould surfaces can be textured
Disadvantage:
- Less material options
- Long production time
- Some shapes and features difficult to incorporate
