The Blog

We are excited to announce our latest lessons in the Processing category. There are six brand new lessons focused on the Cooling and Packing phase. These lessons continue to build on our foundational level of injection molding training.

Filling Phase Lessons Include:

Lesson 1 – Packing Pressure Profiles: Amorphous Materials

This lesson reviews the internal structure of amorphous materials, risks of over- or under-packing a part, pack pressure and how it relates to volumetric shrinkages, clamp tonnages, and cavity pressure, and how to optimize a packing pressure profile using an amorphous polymer.

 

Lesson 2 — Packing Pressure Profile: Semi-Crystalline Materials

This lesson reviews the internal structure of semi-crystalline materials, risks of over- or under-packing a part, pack pressure and how it relates to volumetric shrinkages, clamp tonnages, and cavity pressure, and how to optimize a packing pressure profile using a semi-crystalline polymer.

 

Lesson 3 – Wall Thickness and Packing Pressure

This lesson reviews how to evaluate the polymer material used for simulations, the impact of different wall thickness on filling and packing a part, and how clamp tonnages and volumetric shrinkages are affected by wall thicknesses.

 

Lesson 4 – Polymer Flow During Packing

Topics in this lesson include: modify filling-to-packing switch-over points and packing profiles, how to understand the predominant polymer packing flow path by evaluating tracer results, melt core, packing pressure and clamp tonnages, and volumetric shrinkage development.

 

Lesson 5 – Gate Seal Time

This lesson covers the factors that influence gate seal time, gate size and process range: injection pressures, clamp tonnages, and gate seal times, and practical steps for setting proper gate seal time.

 

Lesson 6 – Clamp Tonnage

Topics covered in this lesson include: what influences clamp tonnage requirements, how changes in fill speed and injection pressure affect clamp tonnages, the impact of packing pressure profiles on clamp tonnages, and the risks of reducing packing pressure at switch-over to lower clamp tonnages.