I was at a customer site recently and they were encountering intermittent contamination throughout the plant but could not isolate the source… The Culprit Upon review, the company has instituted very effective procedures for cleaning all of the material delivery, storage, and drying systems. I observed the entire cleaning process and realized they forgot to clean the feedthroat shut-off. […]
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Routsis Training
Online Videos…
I was asked this question the other day… KG With so much information available online, why do I need training? My Response About 20 years ago, I had a friend who created a library at his company. This contained every relevant textbook, guidebook, magazine, and white paper he could find. He set up chairs, book cases, indexes, and […]
Calculating Nozzle Contact Force…
A blog reader emailed me this question… GW How can you theoretically calculate the necesary contact force between the nozzle and the sprue bushing? My Response The theoretical necessary contact force is based on multiplying the cross sectional area of the sprue bushing or nozzle opening (whichever is largest) by the injection pressure (in plastic pressure). Force […]
Leveling Molding Machines…
A blog reader asked a follow-up question to a previous blog posting… MJ If I don’t level the machine, what will happen? My Response Failure to properly level a molding machine can result in premature wear, equipment damage, and even clamp failure. Any twist or non-levelness of the clamp system results in non-linear movement of the platen and uneven […]
Measuring Tie Bar Strain…
This concludes the three-part post regarding a reader’s question about machine maintenance… Tim What is the best method of measuring tie bar strain? My Response The most common method of measuring this is to follow the procedures of measuring parallelism as discussed in the previous post on measuring platen parallelism. The difference between the parallelism before and after clamping will give you important information […]