Extrusion. A typical extruder. Extrusion is the method that produces the largest volume of plastic products. Extruded products are generally long uniform and solid or hollow complex cross-sections. Sheet and Film Extrusion. Other types: Tubing, Electrical wire coating, Pipes.
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A typical extruder.
Extrusion is the method that produces the largest volume of plastic products
Extruded products are generally long uniform and solid or hollow complex cross-sections
Sheet and Film Extrusion
Other types: Tubing, Electrical wire coating, Pipes
To extrude thin film, air is forced into an extruded sheet and then either pinched or cut.
A common dye to produce sheets is referred to as the coathanger dye.
Injection molding is similar to extrusion only a mold replaces the die.
A polymer is extruded and clamped within a mold. Air is then pushed is and the part is made. The mold is removed and excess pieces are removed as well.
The polymer is injected into a closed mold with a blow pin and parison. Air is blown in and the part is made. The blow pin is then removed.
19.12 Processing Elastomers
Processing elastomers uses processes similar to shaping thermoplastics
Extrusion (tubing, hoses, molding)
Injection molding (components for automobiles
Motorcycle parts made of reinforced plastics
F-14 fighter jet
Mold for hull of a catamaran
Jet ski hull made by hand lay-up