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    Barrel Leakage...

    We had an electric Niigata 110 press leak impact modified Nylon 6 all the way down the barrel to the hopper. I won't bore you with any pictures... 3rd shift foreman: "Yah it ran great last night"....
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    LOW Moisture analyzer hunt

    Hey there Peeps of "Suhasville".. I am looking at purchasing a Loss of Weight (LOW) moisture analyzer. I know they are not the best, but it is all I can manage at this time. Price ceiling is $2500...
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    Re: What is this defect?

    Might be time for a screw pull. Check the tip and checkring. Your shearing the material somewhere.
  4. Re: Selection of Right Parameter for Injection Molding cycle optimisation

    I'm not clicking on that link!!!
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    Re: Excessive contraction on cores.

    I have never run a mold with only air ejection. Stripper would be best. But, without redesigning the complete mold you could try increasing the diameter of the poppet and/or increase the air...
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    Re: New Battenfeld electrics?

    I have not had any experience with them. BUT, we do have a few Wittmann Robots. Battenfeld and Wittmann are now Wittmann-Battenfeld. They can give you a full turn key cell (Molding Machine / Robot...
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    Re: Radel R-5800T Pre-Colored

    It can be difficult to color high temp materials. Its all about the carrier of the concentrate. I was trying to color Ryton R7 PPS with bright blue concentrate. I dried the concentrate with the...
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    Re: Radel R-5800T Pre-Colored

    Coloring high temp materials can be tricky. We had a Bright Blue PPS part and the blue concentrate kept turning green. It all about the carrier resin. We ended up drying the concentrate at a lower...
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    Haitian IAPETUS 281 Ton 2 shot machine

    Has anyone had any experience with Haitian 2 shot machines? It is a side by side injection unit style. Some additional info

    281 Ton Haitian IAPETUS IA 3600b 2-Shot Injection Molding Machine:
    *...
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    Re: First Machine Brand?

    I've been working with Niigata all electrics for a few years now and like them. Husky electric /hydraulic hybrids are nice, but pricy!!
  11. Thread: Shinwa

    by pjhall
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    Re: Shinwa

    http://www.servicesforplastics.com/ScrewsBarrels/screwbrands/shinwaseiki.htm I've used SFP before. Never heard of Shinwa
  12. Re: Newb on the block, need all the help I can get.

    I agree with Suhas. Robert Malloy of the U-Mass Lowell Plastics department wrote the "bible of part design".
    ...
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    Re: Release Coatings

    I'm a fan of the Nibore. I've tried the two part nano-coating from pcs, but I've never seen conclusive results.
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    Re: Lifter and Slide shutting of on each other.

    If the sides come in with the lifters out..OUCHH Make sure you have some positive KO / return (Tie in KO's, use return bars on top/bottom of the mold, mold close interlock switch at KO plate...
  15. Re: Peak PPSI or Transfer PPSI when doing Viscosity Study

    I agree with Rick, but check your injection graph and make sure you don't have a cold slug spike from the nozzle tip. That can really mess you up.
  16. Thread: Foaming agents

    by pjhall
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    Re: Foaming agents

    We use Hyrocercol at 2-3 %. Fill the part 95-99 % full and use NO holding pressure, but have some time. Let the foaming agent do its work.
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    Re: Thick section Optics questions

    I've run small and large optics. Is the material PC? If so try 250-275 and fill SLOW.
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    Re: "Purging the purge"

    Purge compound works to get the color / black specks out. There are some transparent material that will be milky for a long while until the purge comes out. Here are a couple of "transition after...
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    Re: Detection of blocked gates

    I think you should try to fix the contamination issue. But until you do, try using the max injection pressure alarm as well as a cushion alarm. If the parts are very small the cushion alarm may not...
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    Re: Melt cushion variation- short shot - checkring?

    When only using 25% of the barrel capacity you might see one shot with a cushion and the next with no cushion and it will alternate late that. This can be due to "bounce back" after the hold time is...
  21. Re: substrate material for pvc overmold to produce bonding

    Rick and bdeuell,

    Another no no is POM (acetal) and elastomer. Mix delrin or celcon with santoprene and BAD things will happen. I had a material handler put a tray of santoprene into a hopper...
  22. Thread: Machine list

    by pjhall
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    Re: Machine list

    Ever worked with and old Reed? Also add Newbury. I work on Haitans when I visit good ol' Shenzhen, China. Not a big fan of Haitans
  23. Thread: Hello

    by pjhall
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    Re: Hello

    https://youtu.be/-7mhXduBwVw
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    Seen this set-up before?

    89

    A local company wants to transfer some tools to us and two of them are like the attached photo. "Gun #09". Hydraulic eject, no clamp....

    This is a first for me.

    Seen this?
  25. Thread: Gas assist?

    by pjhall
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    Re: Gas assist?

    Mold can be designed with "gas channels" in them and gas nozzles to fill those channels and pack out any thick areas. I did a ton of research about systems and royalty fees. Most of the original...
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