Know-How
The Tools of Tool Maintenance
The root cause of many mold and part issues are ultimately determined by the ability to measure something within one or two tenths of a mil. Readings with precision measuring tools can determine whether a tooling component is to be reused, reworked, or scrapped out.
Read More
Dead Screw Talking
There's a lot you can learn by conducting a post-mortum examination of your screw.
Read More
Mold Filling Simulation: What, When, Why, How
Mold-filling analysis is the right direction to go, but if you want to arrive at your destination—good parts and an efficient process—you’ll need to pay attention to all the details and select an experienced professional to do the analysis.
Read More
How To Size & Calibrate Profile Parts
Doing it right is critical to maintaining profile dimensions.
Read More
Screw Surging, Part III: Unfilled Discharge Section
This type of surge happens most frequently with two-stage screws when the second stage has far more capacity than the first stage. It can also happen when a screw is limited in feeding or melting, causing a partially filled metering section.
Read More
Screws and Pellets: One Size Does Not Fit All
Screw design, pellet type/size and material behavior are all critical issues to consider to deliver uniform melt to the mold.
Read More
Overfeeding Can Cause Surges, Too
Surging can be caused by feed restrictions, as covered in another column, and also by over-feeding or under-melting, discussed here.
Read MoreKnow the Three F’s Of Profile Tooling Design
Designing an extrusion profile and ultimately the die design and sizing equipment cannot be executed successfully without a full understanding of the customer’s quality expectations or specifications.
Read More
Why Non-Return Valves Leak
We all recognize that the non-return valve is a problem. The question is where is the research to figure out how to correct this so we have a better shot at making more consistent parts
Read More