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- 1Describe the process of rotation moulding1. Fill the mould with plastic powder
2. Heat the powder to a high temperature
3. Rotate the mould
4. Cool the material
5. remove the material that has formed around the mould - 2Describe the process of injection moulding1. Clamp the two halves of the injection mould together.
2. Inject the plastic material, which is normally in the form of pellets and then changed into molten form,
3. Dwelling is the pause in the process where pressure is applied to make sure the cavites are filled
4. Cooling
5. Mould opening
6. Ejecting the finished piece of the mould - 3Describe the process of Compression moulding1. Place plastic into a mould
2. Heat the plastic
3. Close the mould and let the material cool
4. Open the mould and take the material out - 4Describe the process of Vaccum moulding1. The mould would be at the bottom of vaccum former
2. sheet of plastic is placed above the mould and clamped in place
3. Plastic is then heated until it becomes flexible
4. The mould is the moved up to the plastic
5. The pump is then turned on and removes the air from under the plastic
6. Let the plastic cool and then remove it from the mould - 5How is a Butt joint formed and what are the pros and cons for it ?Butt joint is the most simple type of joint.
It is formed by two pieces of wood put together on a line or at a 90 degree angle.
it is easy to use and quick to make
it does not provide much strength nor is it aesthetically pleasing - 6How is a Lap joint formed and what are the pros and cons for it ?Two Pieces of wood overlap at the ends by cutting into each piece of wood and fitting the parts together.
It is easy and is more aesthetically pleasing than a Butt joint
If its done incorecctly the joint will provide no strength. - 7How is a Mortise and tenon joint formed and what are the pros and cons for it ?This joint is created when a pocket is created in one section of the wood into which a tenon, which is carved into the end of another section of timber, rests.
The mortise and tenon joint requires a high amount of skill.
However, some of these joints have lasted for over 200 years without fail. - 8How is a Dowel joint formed and what are the pros and cons for it ?They can be used to connect plywood for furniture-making. It is formed by drilling a hole in wood and placing dowell inside it so it can connect with another piece.
It is relativly easy to form
If it is not fitted to the correct size then it will not hold - 9How is a Dovetail formed and what are the pros and cons for it ?The dovetail joint is one of the most complicated joints to manufacture because the pieces of wood have been cut at angles. Both the accepting hole and the joining wood are shaped like a dove's tail to resist any excess force pulling on the joint.
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- Fichas sobre Sin título, creado por Rio Finlayter el 04/06/2018.
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