Some ideas:
increasing mold temp will improve flow
Increase plastic melt temp will improve flow
fast injection speed is your friend
Open up gates
If you're pressure limited, Read up on a...
Type: Posts; User: chrisprocess; Keyword(s):
Some ideas:
increasing mold temp will improve flow
Increase plastic melt temp will improve flow
fast injection speed is your friend
Open up gates
If you're pressure limited, Read up on a...
Hi All,
Anyone know of a known ISO, ASTM or some other standard for Hot-Runner/Mold Cable configuration?
We have an internal standard generally 24 pin 12 zone Han B connections, keeping power...
Hi All,
Looking for ideas to store/move around injection molds in the 5,000 lb range.
Steel pallets?
Heavy duty plastic pallets?
What do you guys use?
Links or photos appreciated
Hi All -
Putting my feelers out there to understand different methods of controlling steel drawings.
We have the scenario where same plastic part # may be produced on 4 or 5 different molds -...
Arburg has always had best service in my experience, a lot depends on your location.
Putting together a quick reference spreadsheet for Tooling Request For Quote (RFQ). Basically just key tooling attributes when looking around for tooling quotes.
Want to hear what others are doing?...
Hello!
I recently transitioned from medical plastics industry into outdoor industry - yahoo!
I'm exploring marketing a premium insulated water bottle as "100% recyclable"
Sort of goofy...
I've run 3 lots of resin many times, but only if customer requires it.
The work-around is justification of a robust processing window. The argument is if you qualify a higher injection speed +...
Parts sticking to the core or cavity?
Verify fill-only parts - The melt flow from your first material is higher then your new material, you may need to adjust shot size or melt temps as a result....
Decompression as well as wet material comes to mind.
Also if your nozzle ID is too small your cushion will bounce - especially with hot-runner tool. Difficult to get consistent...
Hello!
Been a little while since I've logged in since I've transitioned into a new role with a new company :)
One of my side projects is investigating recycled or sustainable polypropylene for...
Interesting - it's fine once it's running though. So what would cause dosage issues when screw is empty vs screw is full?
The material enters the screw same way in either condition. So that sort of...
95% - 98% fill by weight comes to mind, regardless of cosmetics
would look into machine down time and throughput of your dryer. PET can degrade easily if dried too long
Are you drying the material? - Same dryer used every time it runs? Over drying will cause degradation and can cause flow lines
Yes more expensive but arguably very precise to color match. And all the colorant mixing data should be readily available from the supplier.
Everything comes at a cost though! A cost the customer...
Have you looked into or tested pre-compounded material?
Great question, I'm not familiar with an "industry standard" for color matching variation..
In the past customer specifies a color, we'll run off a High and Low limit of that color (example 4% at...
Wouldn't be able to help you wirh price differences
However these guys are 100% medical manufacturing and do great work - manufacturing, assembly, automation etc. They have a plant in Costa Rica....
could try these guys
https://www.hoosiercrane.com/semi-gantry-cranes
Worked with a shop that used a-frames for larger molds and hoist floor crane for smaller molds
I'm sure there are various load specs you can order
Not familiar with any type of half gantry though...
I've found turning the closed loop control off helps pack and hold issues. Also setting the Pack and Hold under VOL to 40 works for me (second image). Think it just changes the rate at which you...
Can't see the pdf's they're too small, but I've sometimes seen machines set-up similar to an "if-then" statement:
If screw position during injection sequence is at position 3.0 or smaller, then...
Yea a 2nd holding profile, that is correct
Generally 0.5s or even 1s if your cycle will permit it, so it's nice and easy on your process and machine. Then I'd follow it up with a screw recovery...
If you're interested in process control, RJG makes an eDart system you can rig to your machine to capture these types of conditions over months and months, and then have the ability to go back and...