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    Re: Help with bubbles in Nylon parts

    A bubble in the sprue in your situation sounds like it is a void and not a bubble.
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    Re: Deduster recommendation for PMMA

    Years ago I paid more for material that was fines separated prior to delivery. I had a Pelletron deduster inline with the dryer. I also utilized hopper filtration at the machine as well. Hope this...
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    Re: M.F.R. Question

    With those MFR's shown. I have personally seen a 20% MFR change within 1 gaylord before. The number placed on your incoming paperwork is simply an average for the lot of material that filled your...
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    Re: M.F.R. Question

    Name of plastic resin Melt flow rate
    Polypropylene 5 to 60
    Polystyrene 5 to 25
    AS resin 10 to 40
    ABS resin 5 to 60
    Acrylic resin 1 to 35
    Polyamide 6 10 to 80
    Polyamide 66 10 to 80...
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    Re: BMC Polyester Composites

    I would start by looking up the following materials PSU (Polysulfone), PES (Polyethersulfone), PEI (Polyeherimide), PAI (Polyamide-imide) and PEEK (Polyetheretherketone). See if one of these types...
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    Re: How was this molded?

    Most likely this is made from an injection molding process. Vacuum forming process is highly unlikely.
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    Re: Melt Flow İndex

    yangozugar,

    Be cautious when comparing plastic materials based on MFI. MFI can only be compared with like materials such as PP & PP. If you were to compare PP and PE that is like comparing an...
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    Re: Ejector Pin Lubrication

    I recommend using progressive components black nitride components.
  9. Thread: MoldFlow

    by Coryhoeppner
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    Re: MoldFlow

    It sounds like you would benefit from mold flow software training.
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    Re: Brown spot defect

    Pictures of the defect will definitely help.
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    3,409

    Re: Molding Pellethane TPU Coatings used

    Please remember to give an update after the implementation. Thanks
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    Re: Molding Pellethane TPU Coatings used

    I have used Bales Nibore coating on molds producing TPU parts with great results.
    I used to have the mold builder achieve diamond 15 polish and then vapor hone finish prior to adding this coating. ...
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    Re: Rings in center of part

    Pictures of this defect would be great. But I believe that you are referring to jetting or record grooving.
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    Re: Family Mold

    I have developed a family mold with 5 dissimilar cavities. The mold used sequential valve gates and my process was predicted based on simulation from RJG Inc.
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    Re: Machine setup

    yabgozugur,
    I believe that you are asking the form of transfer from velocity to pressure.
    If that is the case: 1st choice from your list should always be ram position.
    Changes in material...
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    Re: injection mold design material

    Check out https://rjginc.com/training/registration/ they have great courses.
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    Re: Injection Molding BMC queries

    I have a lot of experience with BMC as well.
    KM is a great machine for molding BMC (as @douginky mentioned). The venting and gate cutting is very useful for manufacturing operations. BMCI is a...
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    Re: Mold release

    smartvn2020,

    I would invite you to PM me and we can discuss your issues further.

    Thanks,
    Cory
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    Re: Excessive contraction on cores.

    Horeki,

    It appears that you have a coefficient of friction issue preventing the product from being ejected. Is the mold coated?
    I would be curious of the water circuitry (how many gpm, pressure,...
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    Re: Velocity-Pressure-Time Parameters

    This is something that the RJG TZERO team specialize in. You should look them up if you still need help.
  21. Re: Design for PIM, maximum thickness strictness?

    I second Bryan's thoughts on this subject matter. If you would like to PM me I could give you my email address to possibly aid further.
  22. Re: I need help with Mold Injection (Skype chat) - How to find correct angle:Slide,Undercuts,how do you use Catalog

    RJG Inc offer classes for all sorts of topics for plastics injection molding as well.
  23. Re: Chiller water is getting dirty and brownish color

    Water can be very problematic to injection molds and machines. I once had the same issues with water at a company that i worked for. This led to an extreme build up of calcium carbonate inside...
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    Re: cashew gate in pc/abs?

    PC/ABS is a material that I would try to refrain from using cashew gating and subgating. The % of ABS is definitely critical if you are gating on a class A part. PC does not play nice with cashew...
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    Re: Proposal of Acetal in a Hot Manifold

    Joel JS,
    If this were my choice... From prior experience with this combination I would refrain from this at all costs. As others have mentioned, any amount of downtime can be very detrimental to...
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