Podcast Beta
Questions and Answers
What is the purpose of a gate in injection molding?
The gate is used to control the flow of the molten material into the mold during injection molding.
Why is the viscosity of metallic melts less than that of ceramic glasses, which in turn is less than that of most polymer melts?
The viscosity of metallic melts is lower than that of ceramic glasses and polymer melts because metallic bonds are stronger and more directional, allowing the atoms to move more freely. Additionally, metallic melts typically have higher temperatures, which also contributes to their lower viscosity.
What is shear thinning and why does it occur?
Shear thinning is the phenomenon in which the viscosity of a material decreases as the shear rate (or stress) applied to it increases. This occurs because the applied stress breaks down the structure of the material, making it easier to flow. It is commonly observed in polymer melts and colloidal suspensions.
Study Notes
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Sure, please provide me with the topic of the quiz.
