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  1. Replies
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    Re: Trueblood 30-ton help needed

    Hey Chuck,
    Just looking at the panel pic it looks to me the slow close 1 and 2 positions are not correct, as the clamp is closing on fast close it will reach the slow close 1 position first then...
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    Re: Material Drooling

    Agree with all the questions from nemanja, just wanted to mention there are nozzle tips designed specifically for nylon that will help. Making sure the material is dry is top of the list, But keep in...
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    Re: Breakage of Nozzle tip

    There should be a pressure adjustment to reduce the hydraulic pressure that is being applied to the injection unit when moving the injection unit forward and/or during the injection of plastic... If...
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    Re: Molding around a bearing

    We ran nylon wheel bearing parts that required press fit assembly in different configurations including what you are describing. We never found a successful process that would produce consistent...
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    1,160

    Re: White streaks or spots

    Based on your description listed above and the defect shown I would suggest you check your nozzle heater bands and or thermocouple. It appears your injecting a cold slug of material because of the...
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    Re: Sandretto Series 7 with SEF 90 Control.

    MATCHING THERMOCOUPLE TYPES TO THE COLOR CODES

    Each type of thermocouple has multiple colors associated with it. Standard grade and extension grade wire have their own respective colors, while the...
  7. Re: Intermittent screeching noise during plasticising stage

    I would start by checking the temperature at the feed throat to make sure it's not getting too much cooling. Next you probably should confirm each heater band is working, it is possible for a zone to...
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    Re: 1996 Cincinnati VT220 Error! E00077

    Richard
    Can you send me the serial number and confirm which controller you have? Also do you have the program for the machine and just need support reloading the program. Where are you located? It...
  9. Thread: Back Pressure

    by Bryan E
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    1,602

    Re: Back Pressure

    Depending on what molding machine your working with you will likely be limited to approximate 300 psi maximum (hydraulic pressure), 150 to 200 psi of back pressure is typically a good range for most...
  10. Re: Best Auxillaries Setup for 270TIM machine for preforms

    The correct answer to your question should be based on the number of water circuits and the diameter of the water lines going through the mold. Just going by assumption based on a 270T machine with a...
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    Re: Too much shrinkage

    The check ring or worn barrel will make a big difference in controlling the size of the part. Especially with Nylon 6/6. Your barrel temps, dryer temps and mold temps. are inline with Dupont...
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    Re: Conformal Cooling equipment

    I copied you a couple of links that will be able to help you, you should be able to use standard equipment for your cooling unless the tooling requires really small water lines or if your water...
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    Re: Excessive contraction on cores.

    Very nice job troubleshooting as a group and thanks for the final feedback on what resolved this issue.
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    Re: injection mold design material

    Check out https://www.dupont.com General Design Principles for DuPont Engineering Polymers module 1 and module 2. Although it is specific to Engineering grade materials the basic principals are...
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    Re: Water System Back Pressure

    Based on what you are saying I agree it sounds like the temperature control unit. Is it possible to swap the unit with the one from machine B? It is interesting that two same brand unit have the...
  16. Re: Design for PIM, maximum thickness strictness?

    I don't have any specific PIM shop's to recommend other then to be open minded to the smaller PIM shops as well. There are a lot of good molding operations, small shops that do everything right...
  17. Re: Design for PIM, maximum thickness strictness?

    This is a very good question, Starting with the last question first, Yes it common where the design recommendations are ignored and sometimes it is successful. Many times it not because of warping...
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    Re: Water System Back Pressure

    Water will always flow the path of least resistance, This maybe a situation where you don't have enough pump to get the water to where it needs to go at a good pressure. However since your needing a...
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    Re: Velocity-Pressure-Time Parameters

    If you keep a constant parameter specifically Max Injection pressure, you risk the possibility of over packing the mold during the first cycles resulting in flashed parts, sticking or stuck parts...
  20. Re: Where can I find either a machine to make these or someone in the US to make them for me?

    You can find them at customeasybuttons.com. There are several Promotional companies making them with different options. The buttons grew in popularity as " The Staples Easy Button" An Office supplies...
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    Re: Vapor/Air lock detection

    If you find that one core is always the hotter of the 8, first swap the water lines between the hot core and a cooler core. The bubbler inside the hot core may be the wrong length, too long and it...
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    Re: New Machine Brand Decision? Help me choose!

    For technical support, Nissei has been the better of the three, specifically for support in Texas. Although we had older 2 shot machines from Engle and Nissei they both had similar issues with the...
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    Re: Before I sell it for scrap... KX220

    I agree with Crabstix in thinking a good direction to go is checking and making sure you have power going to each potentiometers. It would be helpful to know if you have rotary or linear pots. The...
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    Re: Simple Snap Hook/Groove design

    There is good information and design guides from Dupont thermoplastics Resource Center. Check out Design guideline module 1 starting around page 10. It has examples of what you are trying to do. Some...
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    Re: Compressed air for cleaning?

    Shop vac. Except plug the hose into the exhaust side and blow yourself off outside or away from your product. Wear your safety glasses.
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