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Hello all,
I have a mold 16 cavities, ~160g shot size on a 380t machine. It's running general purpose PP, my machine is closed to its maximum injection pressure and speed during FILL and sometimes...

All,

This may sound very very stupid, but I am trying to justify the need of anything on my workfloor. Working close to China, I got a whole batch of "shifu" that would ask me why we are not...

Thanks Rick, I'll try to get the magnet thermocouple to get an accurate reading.

All,
I have been bumping into an issue lately, one of my project had a material change and we are looking into producing a part, which was originally intended in PP, in HDPE. The part looks like an...

89%, all geometry has received plastic at that point. After that, I am trying to get rid of sinks by adding the material during pack.
Val

Hello everyone,
I have a new 16 cavities hot runner valve gated tool in a 4x4 configuration and I had a hard time working with it. I manage to established balance in the Fill phase by profiling the...

I never ran glass material and my questions might be stupid...
-What does the material look like in the area you say it stuck? Is it dry?
-How do you take it off? you wait for it to cool and you...

I think the design of the interface is fine, the tool has run for years, I am just surprised of the delamination issue as I did not encounter it in the past.
Once the part has completely cool down,...

There are 2 shots of substrate between both machines (so 40s). I'll check the cooling.
For the interface, let's say that the substrate have an opening, and around the perimeter of this opening, the...

Hello,
I have a 2 shot application, I am shooting a PP substrate on a first machine, then a TPE overmold is shot over the PP.
I noticed that the bonding around the gate area of the TPE is very...

We haven't found coating that would work for our usage, but we used a slipping agent (crodamide ER) in the material used at a very low percentage, our original objective was to get the parts slippery...

That's two points I wanted to share first, let me know your thoughts and comments. It's a bit of a mix between actual machine and pilot mold testing, but that's really what we are after, flow...

I am not really against sharing my "secrets", if we have to call these this way, but I think that in order to have any feedback on this touchy topic, I need to give in first. So, I'll feed in the...

I would like to know a few things too, we process TPE in our factory on overmolded parts (PP as a substrate, the TPE is overmolded on it).
What I found out, TPE does not work well with suck back, we...

So in other words, just live with it... or investigate myself more thoroughly and bring an answer to the community.
On a lot of parts, I am ok, but some has the end of fill area very close to vacuum...

Hi All,
I mainly do thin packaging tools (PP, <0.9 mm thickness, multi cavities, hot runner). On some tools, when the cycle stops because the robot arm is not able to pick up the part, the first few...

Thanks a lot, in our machine, they specced it out with GPP instead of GPPS. So we were not sure where it was coming from, but now, it's clear.
Thanks again

Hey,
I saw that in the Suhas book, in some formulas, we have 1.06/(Density of the machine) in the capther 6. Can anybody tell me where the 1.06 is coming from?
Thanks and Regards

For PP, we had issues with a lubricant. :)
In one of our part, we added lubricating agent and this stuff would make the resin spin with the screw. I think that in the mixing zone, the resin needs...

If it's happening always at the exact same spot, I would say it's a burn mark, if you short the part, are you trapping air around that area?

If it was coming from the material and colorant mix,...

Yes they are using the same scale, I can't change it, speed scale is on the left, pressure on the right.

Hello,
From time to time, we have grease and oil marks appearing on ejector pins", even though we reduced our lubricant to the minimum, do you guys have a special technique to deal with them. Is...

Thanks for the beer.
I know it's difficult to compare things when we have different machines, different control sets, different material. During the week-end I came up to the conclusion that during...

Me again,
I just finished the book, took me more time than I thought. Anyway, I still have questions not resolved.
For my feedback on the book, it's well written although I think I spot a few...

Thanks, now, that I showed the molding floor I can process a tool... people think that they can rely on me for whatever topic downstairs. At least, it gives me opportunities to learn and practice.
...