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Joining methods - Coggle Diagram
Joining methods
Adhesives
Contact Adhesive
Used for bonding large areas such as sheet metal together. Materials don't have to be the same.
materials are coated and left for a few minutes.
adhesion is instant on contact.
Acrylic Cement
Clear liquid to join polymers.
Acrylic cement softens the surface of polymers to be joined, allowing them to fuse together.
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PVA (Polyvinyl acetate)
Liquid water-based adhesive for wood and wood composites.
Not usually waterproof.
Can be used to bond wood joint in many wood products.
Hot melt glue
A solid stick of adhesive is melted in a hot glue gun.
Can join different materials.
Not structurally strong.
Polystyrene cement
Clear gel consistency liquid used to join rigid polystyrene polymers together.
Polystyrene cement softens the surface of polymers to be joined, allowing them to fuse together.
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Mechanical
Screws
Used in joining wood - wood, metal - wood, wood - sheet polymer
Holes are drilled in both materials for screw to enter and connect both materials.
Rivets
Joins thin sheet metal together.
Overlapped sheets are drilled through where the rivet will be inserted.
The rivet is inserted and the tail is hammered down to make a shop head.
Nuts, Bolts and Washers
Joins materials that may be deconstructed later.
Holes are drilled in both materials for Bolt, usually the bolt is inserted with a washer and tightened into place on the other end with a nut.
Press Joining
Joins thin ductile sheet metals.
materials to be placed are pressed between a punch and a die so the metal deforms into an interlocking shape.
Heat
Oxy-acetylene welding
Uses a steel filler rod to create the weld.
Used in repair jobs or in remote locations with no electric supply.
Used to weld mild steel.
MIG welding
Uses an electrode with an inert gas to heat the metals to be joint.
Suited for thin gauge metals, medium carbon steel or aluminium.
Used in welding tubular products (bike frames, vehicle exhausts, etc.)
Brazing (Hard soldering)
Uses a brass filler rod using either oxy-acetylene or a gas/compressed air brazing hearth.
Suited for one off production or small batches.
Joins dissimilar metals together
Soft soldering
Uses a filler rod to flow between the metal and surfaces to create a join
Generally used to join copper or brass for light-use applications.
Carried out in a brazing hearth or with a gas torch or soldering iron for electronics.
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