BY DAVID HAFFEY IAN KARLE JACOB KENT

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Presentation transcript:

BY DAVID HAFFEY IAN KARLE JACOB KENT Mechanical Fasteners BY DAVID HAFFEY IAN KARLE JACOB KENT

OBJECTIVE EXPLAIN THE USE OF: EXPLAIN COMBINATION OF FASTENERS RIVETS NUTS & BOLTS EXPLAIN COMBINATION OF FASTENERS METAL AND PLASTIC

OUTLINE INTRODUCTION OF FASTENERS TYPES OF FASTENERS RIVETS METAL & PLASTIC FASTENERS RECYCLING & DESIGN CONSIDERATIONS CONCLUSION

INTRODUCTION PURPOSE OF RIVETS & SCREWS PURPOSE OF GENERAL MECHANICAL FASTENERS

TYPES OF FASTENERS RIVETS SCREWS, BOLTS AND NUTS ADHESIVES PLASTIC AND METAL ADHESIVES GLUE TAPES WELDING

APPLICATIONS OF RIVETS INDUSTRAL BUILDING CONSTRICTION PRODUCTION TOYS

TYPES OF RIVETS SOLID TUBULAR SNAP, PUSH & BARB FULL, SEMI, SELF PIERCING, COMPRESSION SNAP, PUSH & BARB

ADVANTAGES OF RIVETS COST LITTLE TRAINING REQUIRED FOR USE CHEAPER THAN MOST THREADED FASTENERS LITTLE TRAINING REQUIRED FOR USE JOIN DISSIMILAR MATERIALS ASTHETICALLY PLEASING VARIETY OF SHAPES

DISADVANTAGES OF RIVETS LOWER STRENGTH THAN BOLTS & SCREWS TENSILE FATIGUE NOT WATER OR AIR TIGHT DIFFICULT TO DISASSEMBLE LOOSENS UNDER HIGH LOADS

TYPES OF METAL FASTENERS SCREWS OVAL, ROUND HEAD, SHEET METAL, LAG BOLTS BOLTS & NUTS MACHINE, CARRIAGE, STOVE NAILS COMMON, WIRE, DRYWALL, FINISH

ADVANTAGES OF METAL FASTENERS HIGHER STRENGTH THAN RIVETS OR GLUE LOW COST EASE OF DISASSEMBLY

DISADVANTAGES OF METAL FASTENERS HIGHER WEIGHT THAN RIVETS OR PLASTIC MOST ARE NOT CORROSION RESISTANT VULNERABLE TO CYCLIC LOADINGS DIFFICULT ASSEMBLY IN TIGHT PLACES HOLES CAN WEAKEN PART

TYPES OF PLASTIC FASTENERS SCREWS NUTS & BOLTS CABLE TIES PANEL FASTENERS

APPLICATIONS OF PLASTIC FASTENERS AUTOMOTIVE WIRE HARNESS RETAINERS PANEL & MOLDING CLIPS GAS & BRAKE LINE CLIPS TOYS APPLIANCES COMMERICAL

MATERIAL TYPES AND PRODUCTION NYLON ACRYLIC HDPE PC PP INJECTION MOLDED

ADVANTAGES LOW COST LIGHT WEIGHT CHEMICAL RESISTANT LOW THERMAL & ELECTRICAL CONDUCTIVITY DESIGN FLEXIBILITY

DISADVANTAGES POOR UV RESISTANCE STRESS RELAXATION CREEP DYNAMIC LOADING FAILURES MORE INTRICATE MOLD DESIGNS LOWER MECHANICAL PROPERTIES THAN METAL

COMBINATIONS OF METAL AND PLASTIC FASTENERS METAL INSERTS IN INJECTION MOLDING THUMB SCREWS STUDS WITH PLASTIC ATTACHMENTS (AUTOMOTIVE)

REASONS FOR COMBINATIONS ASTHETICALLY PLEASING COMBINATION OF PROPERTIES

RECYCLING CONSIDERATIONS METAL AND PLASTIC MUST BE SEPERATED MATERIAL SEPERATION OF PLASTICS PROPERTIES DEGRADE MUILPILE USE

DESIGN CONSIDERATIONS HOLD STRENGTH RECYCLING ABILITIES PRODUCT LIFE APPLICATION MOLD INSERTS PROPER DIAMETERS AND WALL THICKNESS TORQUE AND TENSILE STRENGH

CONCLUSION APPLICAIONS TYPES OTHER CONSIDERATIONS

QUESTIONS

FIN