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  1. Soupcat

    Closed loop systems for injection molding based on measured dimensional data?

    Hi all, Are there any existing systems out there that would take/absorb measured dimensional data from injection molded components and feed it back to the injection molding machine to enable process optimization and valdiation to better control the process? Appreciate any information you can...
  2. Soupcat

    Injection mold piece of Lexan breaks

    You should inquire if the moulder is using regrind material as this can affect mechanical properties. Also find out if there's a filler in the material such as glass or a mineral such as talc which cheapens the material and is probably uncall for. I'd be careful when you broach the moulding...
  3. Soupcat

    Mobile telecoms signal loss properties

    In the current Mobile Telecoms industry, mobile operators are beginning to rollout their 3G networks. With the requirement for more transmission sites and the public objection to signal transmitting installations, operators here in Ireland and the UK are forced by planners to ensure their...
  4. Soupcat

    sticky plastic

    I have seen silicone gel sheets used for medical purpose which can be washed and reused repeatedly with no adverse effects on the stickiness. Kieran Fegan www.moulddesigner.com
  5. Soupcat

    UV-resistant plastic

    Not to forget PC...for extra strenghth and toughness. ASA is marketed on it's ability to retain colour. It has exceptional colour fastness properties and won't fade much over time even in direct sunlight. Kieran www.moulddesigner.com
  6. Soupcat

    Plastics qualification

    There are a few Ian, I'd advise you to subsribe to a publication called the Plastics and Rubber Weekly (PRW) www.prw.com which comes out every thursday and would have the biggest circ in the UK and Ireland. It will have all the info you need on courses, distance learning or otherwise. There are...
  7. Soupcat

    Which material for forcibly unmolded thrads

    tomysux, It's hard to make a call without seeing the geometry of the part. PP and PE are good materials for 'bumping off' threads but a lot of the mechanics in doing it is down to the design of the mold. When you have the design right obviously you can play around with variables like cycle time...
  8. Soupcat

    Moulded-In Clips

    Johnr, The GE site is good for what you need for the design of snaps.... http://www.geplastics.com/NASApp/webradar/resins/designsolution/tools/index.jsp I'd advise you to print it all out as it is a good reference. You will have to register to access though. Kieran Fegan www.moulddesigner.com
  9. Soupcat

    How to mould an exceptionally flat disc

    As Pat has said, almost any amorphous material should meet your stated criteria. Try to select a material which has a comparably low shrinkage value to minimise warpage and try to gate the parts at one end preferably with an edge tab or fan gate. Regards Kieran Fegan www.moulddesigner.com
  10. Soupcat

    vacuum line clogging

    Have you tried putting a solenoid valve with a pulsing circuit on the line and pulsing the air periodically to avoid clog? Kieran www.moulddesigner.com
  11. Soupcat

    Define Flexural Modulus

    The ratio, within the elastic limit, of the applied stress on a test specimen in flexure, to the corresponding strain in the outermost of the specimen. Kieran www.moulddesigner.com
  12. Soupcat

    Polycarbonate domes

    What is your total volume requirement, it may be worth building an aluminium mold to a custom design if you require a few thousand or more? Kieran www.moulddesigner.com
  13. Soupcat

    Who can make thick wall HDPE manhole?

    boscolee, Are you tied to using HDPE? You may want to consider an alternate engineering reinforced thermoplastic and core out the form using strengthening ribs. On cooling a 6 inch section will contract, warp and sink significantly and I would suggest really shouldn't be considered. An FEA of a...
  14. Soupcat

    Plastic and Resin Supplyiers

    Goodfoot, I've always found Basell to be a very good supplier and information source for polypropylenes. You can find out more at www.basell.com. They are a global company. Kieran www.moulddesigner.com
  15. Soupcat

    design of a stirrer

    kchiguvari, I had a similar problem a number of years ago when involved in the design of a material feed system for a Rotational moulding machine. Whilst I didn't investigate stirrers available at the time, I did come up with a good solution. I piped compressed air into the hopper and pulsed it...
  16. Soupcat

    Packaging material for rough outdoor condition

    What is your annual unit volume requirement? And what is the strength requirement, weight of parts being transported etc. Regards Kieran www.moulddesigner.com
  17. Soupcat

    mold price calculation

    Wow folks if Moldcoster is indicative of what you're paying for tooling in the US, I should be upping my prices for design and Ally tooling! Kieran www.moulddesigner.com
  18. Soupcat

    mold price calculation

    Mostly experience, Obviously you have to cover all costs so it's wise to add material costs and total labour plus machining time x their respective rates and then add your profit margin if that's not already included in your rate. Kieran Fegan www.moulddesigner.com
  19. Soupcat

    what gate to use?

    Agree with the comments stated, though you will need a side wall of plastic to sub feed near that hole. If this isn't the case, you might want to consider either a submarine or a winkle gate onto an ejector pin located near the edge of the hole. Kieran www.moulddesigner.com
  20. Soupcat

    PVC/ABS for exterior doors

    Kieran Sorry, but I stayed away from that one, as I lacked knowledge in significant areas, ie the severity (or lack thereof) of exposure to UV in the UK, and only a limited knowledge of the UV properties of PVC. ASA is much better than ABS and I expect a little better than PVC re delta factor...

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