Engineering Materials Polymeric materials Processing of plastic materials

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermoplastic materials Injection Molding: - A Molding process where a heat-softened plastic material is forced by a screw-drive cylinder into a relatively cool mold cavity that gives the plastic the desired shape.

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermoplastic materials Injection Molding: - A Molding process where a heat-softened plastic material is forced by a screw-drive cylinder into a relatively cool mold cavity that gives the plastic the desired shape.

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermoplastic materials Extrusion: - The forcing of softened plastic material through an orifice, producing a continuous product. Example: plastic pipe and sheet are extruded.

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermoplastic materials Blow molding- A method of fabricating plastics in which a hollow tube (parison) is forced into the shape of mold cavity by internal air pressure.

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermosetting materials Compression Molding: - A thermoset molding process in which a molding compound (which is usually heated) is first placed in a molding cavity. Then the mold is closed and heat and pressure applied until the material is cured.

Engineering Materials Polymeric materials Processing of plastic materials Processing of Thermosetting materials Transfer molding: - A thermoset molding process in which a molding compound is first softened by heat in a transfer chamber and then is forced under high pressure into one or more mold cavities for final curing.

Engineering Materials Polymeric materials Processing of plastic materials HW 3 Make a clear comparison among the processes used for molding the plastic materials.