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  2. Vacuum assisted resin transfer molding - Wikipedia

    en.wikipedia.org/wiki/Vacuum_assisted_resin...

    Vacuum Assisted Resin Transfer Molding (VARTM) or Vacuum Injected Molding (VIM) is a closed mold, out of autoclave (OOA) [1] composite manufacturing process. VARTM is a variation of Resin Transfer Molding (RTM) with its distinguishing characteristic being the replacement of the top portion of a mold tool with a vacuum bag and the use of a vacuum to assist in resin flow. [2]

  3. Polystyrene - Wikipedia

    en.wikipedia.org/wiki/Polystyrene

    These beads are the raw material for molding parts or extruding sheets. BASF and Stastny applied for a patent that was issued in 1949. The molding process was demonstrated at the Kunststoff Messe 1952 in Düsseldorf. Products were named Styropor. [19] The crystal structure of isotactic polystyrene was reported by Giulio Natta. [20]

  4. Transfer molding - Wikipedia

    en.wikipedia.org/wiki/Transfer_molding

    Transfer molding (BrE: transfer moulding) is a manufacturing process in which casting material is forced into a mold. Transfer molding is different from compression molding in that the mold is enclosed [ 1 ] rather than open to the fill plunger resulting in higher dimensional tolerances and less environmental impact. [ 2 ]

  5. Plaster mold casting - Wikipedia

    en.wikipedia.org/wiki/Plaster_mold_casting

    Plaster mold casting is a metalworking casting process similar to sand casting except the molding material is plaster of Paris instead of sand.Like sand casting, plaster mold casting is an expendable mold process, however it can only be used with non-ferrous materials.

  6. Compression molding - Wikipedia

    en.wikipedia.org/wiki/Compression_molding

    Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, while heat and pressure are maintained until the molding material has cured; this process is known as compression molding ...

  7. Sheet moulding compound - Wikipedia

    en.wikipedia.org/wiki/Sheet_moulding_compound

    Sheet moulding compound (SMC) or sheet moulding composite is a ready to mould glass-fibre reinforced polyester material primarily used in compression moulding. [1] The sheet is provided in rolls weighing up to 1000 kg. Alternatively the resin and related materials may be mixed on site when a producer wants greater control over the chemistry and ...

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