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  1. Replies
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    Using Cashew Gate on TPE

    Have a 4 cavity part that is being overmolded with 45 Durometer TPE. The part is cashew-gated and cannot be changed to a different gate style. Once in a while a cavity will leave a small amount of...
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    Flexing a living hinge

    Have a part that has a short-term living hinge. The customer is insistent that the hinge be flexed post ejection. My plan is to have an EOAT built that can flex the hinge prior to placement on...
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    4,898

    Nozzle Leakage

    Have a mold that is leaking at 18K injection pressure. Have proven that it is not the nozzle carriage moving. Had the nozzle seat recut and using new tip with no luck.

    The mold is a transfer...
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    Ultra-sonic cleaning of mold components

    Has anyone had good success with this and also does anyone know of a company that does this as a service?
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    4,253

    Ejector Pin Lubrication

    What is the best non-bleeding lubrication for molds that run up to 180°F. I'm working toward converting to greaseless pins, but need an interim solution. Also, has anyone taken existing ejector pins...
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    2,710

    Re: Procerex with Mold Vac System

    Yes, I'm aware of the surface differences, not sure if the customer will like it, but something has to be compromised. The inserts would be visible, but not on an outer surface.
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    Procerex with Mold Vac System

    Anyone have success using Procerex with MoldVac to improve the appearance of weld/meld-lines? Material is gray Valox 357 (FR) Problem is not so much a visual weld line as it is discoloration from...
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    2,536

    FR Rated Materials

    Does anyone have a presentation or write-up on the general guidelines for molding FR rated materials. Like what temperature does non-halogenated FR additives start to degrade and what other process...
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    Gate blush on light pipe

    I have a very small light pipe that I would like to be able to sub-gate, but fear gate blush will be an issue. The part basically has 3 legs, each of which will have an LED. The only place I can see...
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    Two-shot molding opportunity

    Kimball Electronics is looking to partner up with a company that has capability to run a 1 or 2 cavity two-shot mold for a medical device. The part does not need to be run in a cleanroom, but does...
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    Thin-steel overmolding

    What is the thinnest insert that anyone as successfully molded into a plastic part. The insert is about 5" long, 0.100" wide and 0.008" thick. I can support it from both sides but not the entire...
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    High Grip Rigid Resins

    Are there a group of resins out there that provide good grip and feel but are still rigid enough to be assembled and sonic welded? I'm looking to eliminate the need for soft-touch over-mold on a hand...
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    Two-shot vs. overmolding

    Anyone have a general rule of thumb for determining whether to quote a two-shot operation vs. an over-molded operation. PC substrate, SEBS over-mold for one part and PC/ABS substrate, PC over-mold...
  14. Re: Where can I find either a machine to make these or someone in the US to make them for me?

    Yes, injection molded then assembled.
  15. Replies
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    75,349

    Re: Water System Back Pressure

    Thanks Bryan, When I am testing the circuit all the other valves to the mold are turned off to provide max. flow to the test circuit. All valves to and from the temperature control unit (Machine A)...
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    Water System Back Pressure

    We have discovered a low flow condition on a couple of our machines that appears to be back pressure from the return line. I get very good flow when the circuit is open looped(3 gpm), but when close...
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    Re: Vapor/Air lock detection

    I'm not doing a very good job of explaining. I have a mold with many water circuits including bubblers to cool high core steel. One bubbler per core (8 cavities.) During OQ it was found that one of...
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    Vapor/Air lock detection

    Would a flow meter pick up if a bubbler circuit was vapor locked? If not does anyone know of a way to detect this condition within the mold. I am going to add a bleeder valve to the manifold system,...
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    Re: Overmolding/Insert molding

    Thank you all. We decided that with the relative low volume and our inexperience it would be better to outsource this component. It's one of many parts for an assembly. The assembly is the true value...
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    Overmolding/Insert molding

    Have a project that requires two different colored button areas(TPE) to be molded into a housing(ABS.) We do not have multi-shot molding capability. Is it possible to mold the two buttons and mold...
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    Re: Rare cosmetic defect

    Unmelted resin or contaminated with some higher melt resin maybe?
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    Re: Drying Desiccant

    The desiccant is dried as part of the overall process during the regeneration phase. Think of desiccant like a sponge. It can only hold so much water. There is a shelf-life on desiccant, but there...
  23. Re: Running ejector pins dry in a P20 core block

    I'd say 130 degrees F and higher to be safe.

    We purchased the pins called Ultra Pins from Progressive. https://shop.procomps.com/category/63/ultra-pins

    I'm not familiar with coating existing...
  24. Re: Running ejector pins dry in a P20 core block

    Depends on how tight the ejector pins are vs. holes. I'd also consider mold temperature. Higher temp. = more problems. They do make grease-less ejector pins that I've used in the past in both P20,...
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    Re: Storage Box Lid Warpage

    Is the warped corner always the same corner?
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