Understanding the Terminology of Different Molding Machines

Unfortunately, the injection molding world is not very standardized when it comes to terminology on various machines. Navigating the different terms can be a challenge, so let's walk through a few of these terms, what they mean, and how they appear across multiple injection molding machines... Jeopardy style!

[@Diablonegro84]

Great vid. “Suck back” for Decompress, lol

[@jlbanderasb]

Great video Jason, it's a challenge (some times) to realize all those different function names when you deal with multiple brands at your shop...

[@rjg]

Well said!

[@globalcliques]

Thank you this helps me understand my brother's work

[@luisalejandrorapozo7636]

Thanks for this instructional video, Jason. Keep the good work.

[@rjg]

Glad it was helpful!

[@AbhishekThakur-uo6il]

Thank you so much. Different terminologies are really difficult to understand. I didn't knew at first that Dosing/charging/plasticizing all are the same.

[@rjg]

Thanks for watching!

[@danielacevedo8642]

Good video Jason.

[@rjg]

Thanks 👍

[@andyvan5692]

nice video, but the game style of delivering it was a bit confusing, would be nice to have a basic tutorial of the injection moulder's parts, and cycle of functioning, what plastics can be used, as well as a start-up video, from ALL OFF, and NO plastic or mould in the machine, to up and running, as this machine does differ significantly from a 3D printer, which some of us are familliar with :-)

[@zahidmahmood6586]

Originally, suck back was used to overcome nozzle drool, avoiding the need to use a shut-off valve within the nozzle.
Retraction screw in a slow, controllable manner ensures that the sleeve of the back for valve assembly " situated in front of the screw " moves to the same position, each cycle to ensure that the backflow valve assembly obtains a consistent position.
Failing to retreat screw-in a slow, controllable manner could result in excessive variation in the melt cushion.

[@rjg]

I like the term Decompression better because that is precisely what we are doing to the melt. We compress the melt during recovery with backpressure then we need to decompress the melt to reduce drool. The second function of decomp or suck back is to seat the non-return valve in the same position every cycle, this position is fully open. Now the valve travels the exact same distance, full open to full closed, at the beginning of injection.

[@zahidmahmood6586]

@@rjg Hi Jason, l also like the term decompression and fully agreed with you. I love to watch your videos. They are very supportive and helpful. The reason l mentioned the word suck-back is because we can use this term as well as decompression.

[@zahidmahmood6586]

You can also call suck back. ( end of the plasticising).