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EATING OUTDOORS AND OUTDOOR PICNIC FURNITURE PowerPoint PPT Presentation


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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

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EATING OUTDOORS AND OUTDOOR PICNIC FURNITURE

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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?


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