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- Plastics Extrusion | Plastics Technology
Extrusion is a continuous process through which parts of a fixed cross-sectional profile are made Material is fed through a hopper into an extruder, essentially a rotating screw surrounded by a heated barrel, where it is mixed, melted and pumped through a die The die gives the part its shape Types include film extrusion, sheet extrusion, pipe, profile and tubing extrusion
- Pipe, Profile and Tubing Extrusion | Plastics Technology
Pipe is formed when plastics is extruded through a round shaping die, cooled in a water bath, and either cut and coiled Used in manufacture of medical tubing; PVC pipe; HDPE pipe; siding; plastic decking; plastic fencing; window lineals
- Film Extrusion | Plastics Technology
Film extrusion is divided into two subcategories: cast film (flat film) and blown film In cast film extrusion, hot plastic is extruded through a flat, slit die onto a polished chill roll where it is quenched, pulled to a second set of rolls to cool the other side, then wound In blown film extrusion, plastic is extruded into a cylindrical die, then inflated to form a bubble, which is cooled
- EXTRUSION: Melting 101 | Plastics Technology
EXTRUSION: Melting 101 Learn the basics on how polymer melts in a single screw Barrel temperature plays less of a role than you might think
- Extrusion: Start Up and Shut Down Properly | Plastics Technology
Extrusion: Start Up and Shut Down Properly A key goal during startup and shutdown of the extruder is to prevent degradation of the polymer left in the extruder and downstream components such as screen changers, adapters, and dies
- Extrusion: Head Pressure and Output Stability | Plastics Technology
In my June and July columns, I discussed how to use drag-flow and pressure-flow equations to analyze the performance of an extruder Those same equations can be used to analyze certain output stability problems If the output has a rhythmic surge, the cause is almost always a partially filled
- Understanding Grooved Feed | Plastics Technology
Understanding Grooved Feed U S processors still have some catching up to do when it comes to getting the most out of grooved-feed extruders But decades of European experience offer lessons on how to use grooved feeds to run even resins like TPU, nylon, and PET
- Extrusion: Enhanced Deckle Boosts Coating Productivity
Extrusion: Enhanced Deckle Boosts Coating Productivity Simplified mechanisms for Nordson EPC die streamline the adjustment of coating width while reducing the size of edge bead
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