Revision Notes on most of Cp 2
- Created by: Ratch
- Created on: 11-05-16 15:07
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- Graphics Chapter 2
- Scale of Production
- refers to the quantity of the product made
- One off: customised designs
- Unique Features
- Exclusive
- Uses; Prototype and architectural models shop signs vinyl stickers for companies etc
- made to exact personal specification
- high quality materials used
- highly skilled crafts person
- expensive final product
- labour intensive and slow process
- Batch Production: specified quantities 10s-1000s
- Flexible tooling, machinery and work force
- use of computer integrated manufacturing
- Uses: commercially printed materials- magazines
- Fast response to market trends
- lower unit costs
- identical batches of products produced
- frequent changes in production - costly re tooling
- poor production planning - large quantites stored therefore storage costs
- Mass Production: mass market trends
- uses: electronic products- phones etc. , and graphic products
- Specialised work force
- low unit costs
- Low labour costs
- automated and efficient manufacturing processes
- low skilled workforce = low wages
- High initial set up costs - expensive machinery
- inflexible- cannot respond quickly to market trends
- Modelling and Prototyping
- Block Modelling
- helps determine shape, dimensions and surface details. Also help with ergonomic factors.
- MDF
- no grain so easy to cut
- excellent surface finsih
- can be spray painted to create a professional feel
- use for moulds for vaccuum forming
- Styrofoam
- easily cut and shaped
- produced relatively quickly
- PROCESS
- 1. Mark plan and side profiles
- 2, Cut MDF using bandsaw
- 3. Shape using Surfoams,rasps and files
- 4.sanding
- TOOLS
- BANDSAW: Cutting sheet materials
- VIBROSAW: Cutting thin sheet material
- HOT WIRE CUTTER: hot metal wire that cuts through styrofoam and expanded polystyrene
- COPING SAW: cutting curves in sheet material
- PILLAR DRILL: electric drill to drill holes in most materials
- SURFORM: roughly shaping soft material
- RASP: shaping soft materials
- FILE: creating a smooth finish on acrylics and MDF
- GLASSPAPER smooth surface finish on WOODS and STYROFOAM
- WET AND DRY PAPER: Making a smooth finish on acrylic and MDF
- SANDING SEALER: seeling the pourous surface of MDF before painting
- SPRAY PAINT: profesional looking finish to MDF
- Rapid Prototyping
- Fast entry to market
- reduced development time
- produces complex accurate shapes directly from CAD
- Accurate testing of Models
- two types - 3D printing and Stereolithography
- Block Modelling
- Health and Safety
- Using Computers
- Repetitive Strain Injury (RSI) affects muscles and tendons due to poor posture and/or repetitve motions
- Hazard: Using a computer
- Risk: Eye Strain
- Control measures: Adjust screen glare using brightness/contrast controls.
- Reduce reflections
- take regular breaks to rest eyes
- Risk: RSI
- tilt keyboard for comfortable typing position
- use ergonomic keyboard with wrist support
- take regular breaks to rest hands
- Risk: Eye Strain
- Workshop Practices
- Hazard:: Using a Pillar Drill
- Risk: Damage to eyes from flying debris
- Wear Goggles
- Person at risk: user/peopele in immediate area
- Control Measures
- supervision by teacher
- other students wait behind yellow taped line /barriers
- Risk: Cuts from metal shavings
- Person at risk: User
- Control Measures
- Work clamped securely in vice
- Wear Gloves
- place shavings in disposal container
- Risk: Damage to eyes from flying debris
- Hazard:: Using a Pillar Drill
- Using Computers
- Scale of Production
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