Blow Molding | Plastics Technology
WEBAug 21, 2023 · Blow Molding. Blow molding is used in the manufacture of hollow plastic parts, creating common components like PET bottles, HDPE jugs, and jerry cans. Variations on the process include extrusion blow molding (EBM), injection blow molding (IBM), and injection stretch blow molding (ISBM). Packaging.
Injection Molding | Plastics Technology
WEB5 days ago · Compression/Transfer Presses. Prototype Molds. Advertisement. In injection molding, material is fed through a hopper into an extruder, where a reciprocating screw mixes and melts the material then injects it into a mold.
Plastics Technology - Drying
WEBMay 13, 2023 · Control Initial Moisture Levels in Undried Resin. Size Dryers Properly. Dry at Correct Temperature. Keep Drying Hoppers Full. Limit Machine-Side Material Inventory. Keep Airflow Clean and Consistent. Invest in a Moisture Analyzer. Dryers are used to minimize or eliminate problems that moisture in the plastics cause during processing.
Plastics Extrusion | Plastics Technology
WEB5 days ago · 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.
Tooling for Plastics Production | Plastics Technology
WEB5 days ago · Tooling for plastics production include molds, mold components, ejector pins, mold bases, nozzles, mold cores, mold cavities, conformal cooling.
Compounding | Plastics Technology
WEB5 days ago · In compounding, various materials (polymers, additives, etc.) are mixed and melted—generally in an extruder of some type—then pelletized. Most compounding extruders purchased nowadays are of the twin-screw corotating/intermeshing variety, though counterrotating twins are used for some applications. Compounding extrusion lines …
BOPE Takes Aim at BOPP & BOPET Films | Plastics Technology
WEBJul 3, 2020 · Toray Plastics has been a leading manufacturer of PET, PP, biobased, and metalized films for flexible and rigid packaging, lidding, and graphic, industrial, optical, and electronic applications. Nova and Toray jointly conducted pilot-line trials, which provided instant feedback on processing and orientability of various HDPE resin candidates ...
Plastics Materials | Plastics Technology
WEB5 days ago · Materials used in plastics processing include plastics, thermoplastics or polymers, materials are the stuff of which molded and extruded parts are made. Broad subcategories include commodity materials such as polyethylene, polypropylene and PVC; and engineering materials such as nylon, acetal …
Density & Molecular Weight in Polyethylene | Plastics Technology
WEBMay 29, 2012 · The higher the melt index of the material the lower the average molecular weight of the polymer. If you ask a processor what type of PE they are running, a typical response will be, “I’m running a 7-melt, 953 material.”. Translation: a material with a nominal melt index of 7 g/10 min. and a density of 0.953 grams/cm3.
Film Extrusion | Plastics Technology
WEBAug 5, 2024 · 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 ...