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  1. Replies
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    Re: 20% GF PP Warp

    Possible to create a cooling fixture so that the parts cannot warp while cooling?
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    Re: Storage Box Lid Warpage

    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...
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    Blank Setup Template

    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.
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    Re: Injection Moulding training course

    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.
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    Re: Run mold water at 248F !

    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...
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    Re: Help: Acrylic Black Specks and Pitting

    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...
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    Re: Liquid color issue

    Thanks for the update Nikom. Curious to hear of the resolution from Mold Masters.
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    Re: molding with electrical pins

    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...
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    Re: Liquid color issue

    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...
  10. Re: Cleaning hot runner / manifolds while colour changing

    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...
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    Re: Need a Babyplast mold shop--ISO certified

    My company - Roncelli Plastics could help you. DM sent.
  12. Thread: K 2019

    by iamplwirtz
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    Re: K 2019

    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.
  13. Re: Arburg Inj molding machine Error: P/Q board regulating board1

    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.
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    Re: strippable thread dimensions

    DME? PCS? Or American Quality Molds could potentially help...
  15. Thread: Mold saver

    by iamplwirtz
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    Re: Mold saver

    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.
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    Re: Waviness/Ripple on Part

    Just curious if you tried to heat the mold above 70F...?
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    Re: Hot Runner-Nozzle Heater

    Flash Back Friday!
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    Re: Toshiba! Your favorite machine?

    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...
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    Re: Material Stock Temperature

    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...
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    Re: Blush or Graying at molded part edges

    Has this always been an issue? Whats your mold temp?
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    Re: Blush or Graying at molded part edges

    It looks as if it could be sticking to the mold on that line... I'd try heating the mold more....
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    Re: How to control the pressure when molding?

    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)
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    Re: Ultem and CF Peek in an aluminum mold

    Rick:

    Currently heating with oil at 400 degrees... Could potentially go hotter, but it's an aluminum mold... I'm wondering if we tried filling from multiple positions if it would help? There's...
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    Re: Ultem and CF Peek in an aluminum mold

    Thanks Jay, yeah these are very thick parts. It makes sense why no company would give them a bid for doing it. Good for me, I have a great job. Bad for me, mission impossible. I'm going to try to add...
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    Re: Ultem and CF Peek in an aluminum mold

    Unfortunately that is the exact shape and size of the part, only that there are two cavities in the mold. One facing up, the other upside down. Nearly in the shape of a square.

    As for the runner...
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