Plastic & Injection Molding

Why is Core Pull Preload Important for Injection Molds?

Although many plastic component designers may not think about it, core preload is an essential part of any successful injection molding project requiring precision and uniformity. As the creators of KOR-LOK® Side Action Systems, PFA has a unique understanding of preload and the critical importance of choosing a hydraulic locking cylinder (HLC) that will maintain proper preload […]

Plastic & Injection Molding

The Basics of Plastic Injection Molding

While using molds to make solid objects has been a concept for thousands of years, plastic injection molding is a far more recent development. Through the injection molding process, a liquified plastic resin is injected into a mold where it will chemically cure or eventually cool into the shape that the mold provides. In this […]

Plastic & Injection Molding

Forces and Calculations are Key to Sizing Core Pull Hydraulic Cylinders

Hydraulic cylinders are commonly used on injection molds to actuate movable core. When considering  “How to Size” a hydraulic cylinder for moving the core or preloading the core, PFA recommends to review three positions – initial breakaway, movement during stroke, and end position.  After determining the limiting condition, a proper size may be determined.  PFA’s […]

Hydraulic Locking Cylinders, Plastic & Injection Molding

Why is Core Preload Important for Injection Molds?

Although most manufacturers do not think about it, core preload is an important part of any successful injection molding project that requires not only precision but uniformity. As the creator of KOR-LOK® Side Action Systems, PFA understands not only core forces under injection but also how preload is necessary to overcome those forces and the importance of choosing […]

Plastic & Injection Molding