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  2. Plastic extrusion - Wikipedia

    en.wikipedia.org/wiki/Plastic_extrusion

    This process is the same as a regular extrusion process up until the die. There are three main types of dies used in this process: annular (or crosshead), spider, and spiral. Annular dies are the simplest, and rely on the polymer melt channeling around the entire cross section of the die before exiting the die; this can result in uneven flow.

  3. Extrusion - Wikipedia

    en.wikipedia.org/wiki/Extrusion

    Extrusion is a process used to create objects of a fixed cross-sectional profile by pushing material through a die of the desired cross-section. Its two main advantages over other manufacturing processes are its ability to create very complex cross-sections; and to work materials that are brittle, because the material encounters only ...

  4. Rule based analysis of extrusion process - Wikipedia

    en.wikipedia.org/wiki/Rule_based_analysis_of...

    Extrusion is a plastic deformation process in which raw material (billet) is forced to flow by compression through the die opening of a smaller cross-section area. The extrusion process is divided in two basic types: direct extrusion and indirect extrusion.

  5. Spinning (polymers) - Wikipedia

    en.wikipedia.org/wiki/Spinning_(polymers)

    The direct spinning process avoids the stage of solid polymer pellets. The polymer melt is produced from the raw materials, and then from the polymer finisher directly pumped to the spinning mill. Direct spinning is mainly applied during production of polyester fibers and filaments and is dedicated to high production capacity (>100 ton/day).

  6. DFM Guidelines for Hot Metal Extrusion Process - Wikipedia

    en.wikipedia.org/wiki/DFM_Guidelines_for_Hot...

    Extrusion profiles with holes are very difficult to produce because they can not be just produced by a simple die, so it should be practiced to reduce the number of holes as much as possible. With steels and other less extrudable materials, holes in asymmetrical shapes should be avoided because they lead to unsymmetrical stresses which cause ...

  7. Friction extrusion - Wikipedia

    en.wikipedia.org/wiki/Friction_extrusion

    Friction extrusion is a thermo-mechanical process that can be used to form fully consolidated wire, rods, tubes, or other non-circular metal shapes directly from a variety of precursor charges including metal powder, flake, machining waste (chips or swarf) or solid billet.

  8. Pasta processing - Wikipedia

    en.wikipedia.org/wiki/Pasta_processing

    Pasta processing is the process in which wheat semolina or flour is mixed with water and the dough is extruded to a specific shape, dried and packaged. Durum wheat semolina or flour, common farina or flour, or combination of both is mixed with water and eggs (for egg noodles) and other optional ingredients (like spinach, tomato, herbs, etc.).

  9. Extrusion moulding - Wikipedia

    en.wikipedia.org/wiki/Extrusion_moulding

    Extrusion is a manufacturing process used to make pipes, hoses, drinking straws, curtain tracks, rods, and fibre. [1] The granules melt into a liquid which is forced through a die, forming a long 'tube like' shape. The shape of the die determines the shape of the tube. The extrusion is then cooled and forms a solid shape.

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