Introduction

Manufacturing ProcessChairNAMES1.MOHAMAD FUADDIRIDZA BIN KAMARUDINB0512101622.MOHD SYARIZAL BIN ANUARB0511102313.MOHD AZIZUL HIKMI BIN SAFIANB0511101444.MOHAMMAD HANAFI BIN HAMZAHB0511103415.LOH YEN CHING B051110129

Group Members

IntroductionFunction :Widely used in various sectorsProvide comfortable to the user.

Research :Product drawingMaterial selection Manufacturing processAlternative process

Plastic2 rod where GI type material with diameter 2cm4 GI rod after bending process

Dissemble Part

Side viewFront viewTop view3 side view

MATERIAL SELECTIONLEANING AND SEATING PARTSUltimate tensile strength : 19.7-80 MPaYield strength :12-43 MPa Elongation :10-20%Advantages: -High ultimate tensile strength -Low density (0.91g/cm3) -Recyclable -High stiffnessDisadvantages: -Difficult to bond -Low melting point

POLYPROYLENEUltimate tensile strength : 46-60 MPaYield strength :30MPa Elongation :7%Advantages :-Cheap -High melting point -easy to formDisadvantages:-Low ultimate tensile strength -Not environmentally friendly -High density (1.05g/ cm3)

POLYSTYRENELEGS OF CHAIRUltimate tensile strength : 589.5 MPaYield strength : 374 MPaElongation : 28%Advantages :-High durability and strength -Good corrosion and oxidation resistanceDisadvantages:-Brittle -High density

CARBON STEELUltimate tensile strength : 400-540 MPaYield strength : 250-540MPa Elongation : 20%Advantages :-Cheap -Low density -Excellent corrosion and oxidation resistance (Because galvanizing process provide a greater protection against corrosion for iron)

GALVANIZED IRONDisadvantages : -Low ultimate tensile strength -Electrolytic action when combined with nonferrous metals, such as copper and brass.

MANUFACTURING PROCESSChair Frame

Plastic Part of the Chair

Assembly and Finishing ProcessCHAIRALTERNATIVE PROCESS

PLASTIC(Polypropylene)Injection MoldingThe plastic compound is heated to a semi fluid state andsquirted into a mold under great pressure will hardens quickly.

AdvantagesHigh Production ratesDesign flexibilityCan process a wide range of materials

DisadvantagesHigh initial equipment investmentHigh startup and running costs possiblePart must be designed for effective moldingAccurate cost prediction for molding.SteelElectrogalvanizing: The immersion of iron or steel in an electrolyte, a solution of zinc sulfate or cyanide.Electrolytic action deposits a coating of pure zinc on the surface of the iron or steel.

Advantages:The thickness of the coating can be accurately controlled using this process. Limitations:Natural Corrosion- exposure to the atmosphere and by the action of rainwaterPhysical Deterioration-vandalism