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  • Users: reyemka
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  1. reyemka

    When/where to use rads?

    What are your opinions on when or where to use rads on plastic parts? Obviously there are locations where you need rads (ie plastic flow, base of bosses etc) and locations where you can't have a rad (ie parting line), but I'm talking about using rads on every edge or only where necessary...
  2. reyemka

    Plate out issues with Teflon Lubrication

    Hi, We are using a teflon & silicone lubricated acetal and are experiencing issues with the teflon plating out onto the tool. The molders need to clean the tool every 8hrs to keep the parts in spec. We've tried alternate materials but have found that we really need the teflon to meet our...
  3. reyemka

    Hello, I have an application wi

    Hello, I have an application with a simple journal bearing and I'm using Acetal for the shaft and Noryl for the bearing. For the shaft I have parts in both Celcon M90 and a Lubricomp grade that uses a silicone additive. There is only a small torque applied to the shaft so minimizing friction...
  4. reyemka

    Plastic that can withstand boiling - 200 cycles

    I'm looking for a plastic that can withstand 200 boiling cycles (15min each). It also needs to hold a colour and be high gloss (think consumer medical product). I've tried high heat ABS with a DTUL above 100°C, but apparently HH ABS is only good in a dry heat. I'm looking for something...
  5. reyemka

    Allowance and Tolerances for Fits

    I'm looking for some guidelines similar to the Machinery's Handbook Allowance and Tolerances for Fits, but for plastics?
  6. reyemka

    Plastic Axle

    Hi, I have an application where I need to use a plastic axle for a pivoting mechanism (20Hz). The axle will have a thin blade attached to one end as well. One of the requirements is cleaning in a microwave steam sterilization bag, so using a metal rod is not an option. I am considering...
  7. reyemka

    Airtight interlock design

    Can anyone offer some advice on airtight interlock designs? The device I'm working on has two shelled parts that are snapped together to form a case and it needs to be airtight. It is a breathing device so the pressures are low (< 1 psi). I've attached a PDF showing the design. Thanks,
  8. reyemka

    Solenoid Pulse Frequency

    Hi, I looking at using a linear solenoid to open and close a port at a rate of 10-20Hz with a 50% duty cycle. Will a battery powered solenoid be able to operate at this frequency? Thanks,
  9. reyemka

    How are plastic P-Traps made?

    I'm wondering if someone can explain how plastic p-traps are made. Here is a picture of what I'm talking about. http://www.hardwarestore.com/media/product/243923_front200.jpg

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