EATING OUTDOORS

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EATING OUTDOORS AND OUTDOOR PICNIC FURNITURE
ERGONOMICS ANTHROPOMETRICS MECHANISMS AND
TRANSPORT ICT CAD/CAM CNC - CIM COSTS, PARTS
COMPONENTS DURABILITY SUITABILITY DESIGN
REQUIREMENTS SOCIAL MORAL CONSIDERATIONS
MATERIALS FINISHES CONSTRUCTION
FIXINGS MATERIAL PROCESSES QUANTITY
PRODUCTION HEALTH AND SAFETY SMART
MATERIALS ENVIRONMENTAL ISSUES
THIS IS THE CONTEXT OF SOME QUESTIONS FOR SECTION
A. MAKE A STUDY OF OUTDOOR PICNIC FURNITURE AT
HOME OR LOCAL PICNIC/RECREATIONAL AREAS. YOU MUST
TAKE COLOURED PENCILS IN TO THE EXAM.
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MATERIALS
STUDY THE PICNIC TABLES, CHAIRS FOOD STORAGE
CONTAINERS YOU HAVE AT HOME. LOOK AT THE
EXAMPLES ON THE BACK OF YOUR PREP
SHEET HIGHLIGHT THE MATERIALS, PROCESSES AND
PROPERTIES THAT MAKE IT SAFE FOR OUTDOOR EATING.
PROPERTIES
FOODSTUFF COMPATIBLE !! GOOD AVAILABILITY
!! VARIETY OF COLOURS !! QUALITY FINISHES
!! HIGH IMPACT STRENGTH !! EASY TO CLEAN
!! RESISTS CORROSION !! LOW IN COSTS !!
QUALITY MATERIALS QUALITY PRODUCTS.
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HARDWOOD VERSUS SOFTWOOD
DOUGLAS FIR (COLUMBIAN PINE) REDDISH BROWN.
KNOT FREE STRAIGHT GRAIN. OUTSIDE CONSTRUCTION
WORK. WESTERN RED CEDAR DARK REDDISH BROWN.
KNOTT FREE WITH SILKY GRAIN. WEAK AND EXPENSIVE.
OUTDOOR USE FOR CLADDING
TEAK GOLDEN BROWN. HARD, STRONG AND DURABLE.
VERY ATTRACTIVE GRAIN USED FOR HIGH CLASS
FURNITURE BEECH PINKISH BROWN WITH FLECKS IN
GRAIN. HARD, TOUGH AND STRONG. POLISHES WELL.
MOST USED FOR CHAIRS AND FLOORS. OAK LIGHT TO
DARK BROWN WITH SILVER GRAIN. STRONG, DURABLE
WITH LITTLE SHRINKAGE BOAT BUILDING NATURAL
RESISTANCE TO MOISTURE AND HIGH CLASS
FURNITURE. MAHOGANY REDDISH BROWN. PLENTIFUL
SUPPLY, EASY TO WORK WITH AND GOOD FINISH ELM
LIGHT REDDISH BROWN. TOUGH, ELASTIC AND DURABLE.
USED FOR TURNING AND CONSTRUCTION WORK
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PROPERTIES
HARDWOODS.
SOFTWOODS.
CONIFEROUS TREES GROW IN COLDER TEMPERATURES KEEP
THEIR LEAVES ALL YEAR ROUND GROW QUICKLY - 30
YEARS LESS EXPENSIVE READILY AVAILABLE GOOD
CONSTRUCTIONAL TIMBER AND GENERAL WOODWORKING
PROJECTS
BROADLEAF OR DECIDUOUS TREES GROW IN WARM
TEMPERATURES LOSE THEIR LEAVES IN WINTER GROW
SLOWLY 100YEARS MORE EXPENSIVE BETTER GRAIN
STRUCTURE FOR IMPROVED QUALITY FINISH
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FERROUS VERSUS NON-FERROUS
CAST IRON GREYISH WHITE. HARD SKIN WITH BRITTLE
CORE. CANNOT BE BENT. HEAVY MACHINES OR
VICES MILD STEEL LIGHT GREY. ALLOY OF IRON
CARBON. TOUGH AND DUCTILE. EASILY WORKED OR
JOINED. NAILS, SCREWS AND GIRDERS STAINLESS STEEL
HARD AND TOUGH, RESISTS WEAR, CORROSION
RESISTANT. DIFFICULT TO WORK WITH BUT IDEAL FOR
LINKAGES AND FOLDING MECHANISMS
ALUMINIUM SILVERY GREY. HIGH STRENGTH TO WEIGHT
RATIO. DIFFICULT TO JOIN. WINDOW FRAMES.
EXCELLENT FOR EXTRUSION. TIN PLATE GREY
SHEET. SOFT AND WEAK, BENDS WITH STEEL CORE. TIN
CANS ETC. BRASS LIGHT GOLD. ALLOY OF COPPER
AND ZINC. WORK HARDENS EASY. ORNAMENTAL.
TASK - Find out about EXTRUSION
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PROPERTIES
NON-FERROUS
FERROUS
CONTAINS NO IRON LESS VULNERABLE TO CORROSION
RUST MAINLY PURE METALS CAN BE MIXED WITH ONE
ANOTHER TO OBTAIN REQUIRED CHARACTERISTICS. ALL
ARE GENERALLY EASY TO WORK WITH
CONTAINS IRON VULNERABLE TO CORROSION
RUST MIXED WITH CARBON TO OBTAIN ALLOY STEELS OF
VARYING STRENGTHS ONLY MILD STEEL IS EASY TO WORK
WITH
COMMON TO BOTH ELASTICITY PLASTICITY MALLEABILITY
DUCTILITY HARDNESS TOUGHNESS
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DESCRIPTIONS
DUCTILITY THE ABILITY TO UNDERGO COLD PLASTIC
DEFORMATION
ELASTICITY THE ABILITY TO FLEX AND BEND WHEN
FORCED.
COMMON TO BOTH ELASTICITY PLASTICITY MALLEABILITY
DUCTILITY HARDNESS TOUGHNESS
PLASTICITY ABILITY TO BE CHANGED PERMANENTLY
THROUGH EXTERNAL BLOWS
HARDNESS THE ABILITY TO RESIST WEAR AND
ABRASION USUALLY BRITTLE
MALLEABILITY THE EXTENT TO WHICH A MATERIAL CAN
PERMANENTLY DEFORM IN ALL DIRECTIONS WITHOUT
CRACKING
TOUGHNESS THE ABILITY TO WITHSTAND SUDDEN
SHOCKS OR IMPACT. RESISTS CRACKING WHEN BENDING
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THERMOSETTING VERSUS THERMO
POLYTHENE LOW AND HIGH DENSITY. FLEXIBLE. RANGE
OF COLOURS. FOOD CONTAINERS, CASINGS PLATES AND
CUPS ETC. HDPE STIIF AND HARD, MAINTAINS
RIGIDITY IN HIGH SUNLIGHT. STERILE FOR FOODSTUFFS
CUTLERY ETC. TOUGHENED POLYSTYRENE
LIGHTWEIGHT, STIFF, WATER RESISTANT, FOOD SAFE,
GOOD INSULATOR ACRYLIC STIFF, HARD AND DURABLE.
VARIETY OF COLOURS, CASINGS AND GARDEN FURNITURE.
UREA FORMALDEHYDE STIFF, HARD, STRONG AND
BRITTLE. RESISTS HEAT AND RANGE OF COLOURS.
ELECTRICAL FITTINGS MELAMINE FORMALDEHYDE
STIFF, HARD, STRONG, SCRATCH RESISTANT. RANGE OF
COLOURS. TABLE WARE AND LAMINATES. POLYESTER
RESIN STIFF, HARD AND BRITTLE. ELECTRIC
RESISTANCE. CASTING, GRP, CAR BODIES ETC. EPOXY
RESIN HIGH STRENGTH RESISTANCE TO WEARING.
ADHESIVE, SURFACE COATING, PCB COMPONENTS ETC.
Investigate what material could be used to make a
food container?
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PROPERTIES
THERMOSETTING
THERMO
LONG CHAIN MOLECULES THAT ARE ENTANGLED BUT
FLEXIBLE CAN BE RE-SHAPED WITH LITTLE
HEAT VARIETY OF COLOURS PLASTIC MEMORY THAT
ALLOWS THEM TO RETURN TO ORIGINAL SHAPE
LONG CHAIN MOLECULES THAT ARE CHEMICALLY BONDED
TOGETHER RIGID AND NON FLEXIBLE HIGH RESISTANCE
TO HEAT GOOD ELECTRICAL INSULATORS
Task What would be the social and environmental
impact of leaving litter after a picnic?