Injection Molding | Plastics Technology
网页2024年10月2日 · Plastic injection molding is a cyclical manufacturing process that allows for cost-efficient production of a mass number of identical parts made from either thermoplastic or thermoset materials.
How to Deal With Residual Stress in Molded Parts
网页2019年7月1日 · This is relatively simple and should be done for all molding programs. You will learn a lot about residual stress if you thermally cycle your parts after molding. That is, put them in an oven and see what happens at around 230 F (110 C) then cool them down to -40 F (-40 C). And repeat.
15 Things to Know About Servo-Driven Injection Machines
网页2017年2月27日 · 3. Servo (driven) hydraulic IMM. A servo-driven hydraulic (or servo-hydraulic) machine is a full- hydraulic IMM with a servo motor to drive the hydraulic pump. These machines often have a fixed-displacement-pump, but could also have variable-displacement-pumps (often DFEE or DFEC) with a swash-plate. 4.
PET Processing - Injection Molding | Plastics Technology
网页2022年11月24日 · Advertisement. Advertisement. Processing PET into bottles can take two steps. In the first step, PET is injection molded into a mini bottle complete with threads, called a preform. This preform is then reheated, stretched and blown into its final shape. Proces includes PET preforms; preform cooling; preform inspection; coinjected preforms ...
Solving Issues with Gloss | Plastics Technology
网页2016年9月27日 · A cooler mold, cooler melt, lower pack/hold pressure, and slower fill speeds will tend to make your plastic part glossier. This occurs because the plastic is not forming to the micro details of the cavity steel surface finish because it is cooler and less pressure is being applied. And the opposite—hotter mold and melt, higher pack/hold ...
Nozzle Leaks: Why They Occur, How to Detect & Fix Them
网页2012年7月30日 · Safety first: Nozzle-contact forces can damage the “A” plate if it’s not supported properly. Close the mold to ensure support of the stationary side before bringing the injection unit to nozzle touch. I’ve seen the nozzle-contact force bow or push off the “A” plate. ; Nozzle leaks are a serious problem in injection molding.
Events | Plastics Technology
网页Your Tour Guide to Plastics Technology’s 2023 Events. Get your clicking finger in shape and sign up for all that we have in store for you in 2023. Robust Molding, Extrusion Conference Programming in the Works. Molding 2023 to take place Aug. 29-30 in Minnesota; Extrusion 2023 slated for Oct. 10-12 in Indiana.
Novel Nozzle Tip Prevents Stringing, Saving Molds & Cycle Time
网页2020年10月12日 · Novel Nozzle Tip Prevents Stringing, Saving Molds & Cycle Time. New design is said to eliminate mold damage from nozzle stringing or work-arounds that slow cycles. After four years in development, an injection machine nozzle tip has been commercialized that is said to eliminate problems of stringing and all the compromises …
Latest Issue | Plastics Technology
网页2024 Handbook & Buyers' Guide READ NOW. November 2023 READ NOW. October 2023 READ NOW. SEE MORE ISSUES. The latest issue of Plastics Technology magazine covers plastic technologies, shopfloor operations, and case studies written by staff editors and industry experts.
Understanding Flow Fronts and Defects | Plastics Technology
网页2022年12月8日 · Flow fronts moving too slowly can lead to pressure in front of a flow front being too low to force gas through vents. Adjustments to injection speeds are the best way to determine which of these two are the specific cause. Faster injection increases pressure in front of a flow front. Lower speeds allow gas more time to escape through vents.