The size and shape of the gates used in mold making are often not given the attention they deserve. Randy Kerkstra believes that many of the common assumptions about gate geometry should be challenged. In his recent article on Plastics Technology (http://www.ptonline.com), he explains how he learned about gating and runners when he transitioned from tooling to the molding floor.
This article really goes in depth on several of the factors and considerations of Gate Geometry. You can read the entire article here: The Importance of Gate Geometry
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Designer’s Edge: How to Correctly Size a Hydraulic Cylinder
Randy Kerkstra has continued his series on Hydraulics on moldmakingtechnology.com, and this article focuses on how to size a hydraulic cylinder. In true Randy style, he broke it down into 3 easy to understand steps:
Understand the maximum plastics pressure to calculate the the plastics pressure the cavity surface area will have on the component.
Accurately calculate the the cavity surface that is on the surface area of the component.
Texture is an area within injection molding that is often poorly understood, and rarely addressed. In this recent article on Plastics Technology, Randy takes the issue head on, dispelling many common myths and explaining the various factors of gloss and texture. (more…)
In this article on MoldMakingTechnology.com, Randy starts his series on Hydraulics. He plans on covering proper use and sizing, limit switches, proximity sensors and other factors that can impact potential failures. (more…)
Randy Kerkstra continued his series on venting with this article that gets into the specifics of venting and addresses many of the challenges that molders face everyday.
One issue in particular that Randy discusses is perimeter venting. With the industry being split between who thinks it is beneficial and necessary and those who thinks it’s not.
Another issue discussed is the depth of the vents, and he does a great job of explaining his process for addressing vent depth issues.
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