Torsten’s Training Tip: Jetting
Injection molding polymer through small gates creates complex three-dimensional fluid flow behaviors. Jetting occurs in injection molding when polymer material is injected through a nozzle, runner, or gate at high velocity, into open, thicker areas, without forming contact with the mold wall. The jetting effect is like water flowing through a hose. If you place your thumb on […]
Torsten’s Training Tip: Understanding Flow-Induced Molded-In Stress
Injection molding is a complex manufacturing process involving temperature and pressure. During the molding process polymer materials experience complex molecular chain deformation while undergoing temperature and pressure changes. Molded part properties and performance are dependent on, and influenced by, design complexity and the molding process. Understanding molded-in stress, specifically flow induced molded-in stress, is an […]
Torsten’s Training Tip: Short Shots
Injection molding is a complex scientific manufacturing process. By following a methodical set-up process, molders aim to minimize or eliminate common molding defects that affect part quality. Generally, molding defects are either part design, mold design, or process related. This training tip focuses on short shots. There are various potential design-related causes for short shots. […]
Torsten’s Training Tip: Sink Marks and Voids
Two common and related injection molding defects, sink marks and voids, are the result of excessive polymer material shrinkage. Because it is essential to produce high quality parts free of molding defects, understanding the causes in order to reduce or eliminate sink marks in molded parts can be very helpful. Let’s review some basics. A […]
Molding Defects Level 2 Press Release
For Immediate Release Kruse Training launches Molding Defects Level 2 interactive training for injection molders, part and mold designers and process engineers NAPLES, Fla., September 15, 2020 – Kruse Training Inc., a leading developer of interactive online training programs for injection molders, part and mold designers, and process engineers, is introducing Molding Defects Level […]
