Speedy Recovery, Rick.
Type: Posts; User: iamplwirtz; Keyword(s):
Speedy Recovery, Rick.
All too common occurrence. Have a print, make a model, shot parts, approve but don't update drawings.
Very difficult to see. But it appears as gas trapped or material degradation.
I'd recommend slowly the injection speed. If that doesn't work, perhaps lowering the barrel temps.
Possible to create a cooling fixture so that the parts cannot warp while cooling?
Cycle time too short. Cool the B side of the mold. Longer hold time in mold before ejecting. If you still have warp, create fixture to decompress part for a few minutes with fan on part so it cools...
Does anyone have a blank process setup sheet that they can email me or post a link to? I tried searching online to no avail...
email:
pwirtz@roncelli.com
Thank you.
There are a number of training seminars here in the US. Unsure of your location, but look up Paulson Plastics Academy, RJG or AIM are most well known programs.
Hey Joel,
We typically run everything from 250 and below on water here. Anything above on oil. With high temp water hoses and fittings - it's not that hot. Be sure to get non-corrosive fittings...
Was the dryer and hoses cleaned properly from the last job? I know you said you cleaned the screw and barrel, but how about the feed throat from the hopper into the press? Usually it's a square with...
Thanks for the update Nikom. Curious to hear of the resolution from Mold Masters.
Has the number of leaking parts always been consistent, or has it recently gone up? Is there a process in order to clean the pins prior to molding around them? If the pins are clean and free of oil...
Along with what JayDub suggested about an alternative screw, we have contacted customers and convinced them of making the switch to dry color for uniformity. Just so much easier to work with and get...
I've had decent luck with ASACLEAN. This is directly from their website. It's important to follow the purging procedure as results vary by material and temps. Hope this helps.
Injection Molding...
My company - Roncelli Plastics could help you. DM sent.
As with Rick, have yet to make one. I always think that i'm going to make the next one and then something happens in life and throws it off course. Definitely would like to some day though.
Thank you for the follow up Barath...
So many times people post their issues and never come back and provide solution and often times I wonder what was the error / problem.
DME? PCS? Or American Quality Molds could potentially help...
I've never used wax paper on molds... We have to store slides and inserts. For molds we either use the PPE rust preventive or Slide "NO-RUST" rust preventative... Both are clear.
Just curious if you tried to heat the mold above 70F...?
Flash Back Friday!
Similar experience as you with Van Dorns - albeit I've experienced my owes with them about certain replacement parts on older models...
Currently working with five JSW all electric machines and...
I had a similar issue while running some Isoplast material a few years back on older Van Dorn machines. Especially in summer. It actually was the machines getting hot. I had to adjust the pressure as...
Has this always been an issue? Whats your mold temp?
It looks as if it could be sticking to the mold on that line... I'd try heating the mold more....
One of the basic rules of scientific injection molding is among the most frequently broken: aim for 95% to 99% filled parts at transfer before packing. (adding pressure)