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Participant

Join Date: May 2013
Posts: 3

Molded Backshells

05/21/2013 4:43 PM

Can someone please instruct me on the proper procedures to putting a molded back shell onto a multi-pin connector, i.e. a D/38999 series connector? Thank you in advanced for your time.

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#1

Re: Molded Backshells

05/21/2013 5:01 PM

Not enough information.

Every molded back shell I've ever seen is pretty obvious in its function and use.

Is this for potting?

What does Amphenol Aerospace-home of electrical connectors say about this?

My advice is to seal, or tape, as required, fill with potting compound and cure.

Remove tape, or seal after cure.

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Participant

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#2

Re: Molded Backshells

05/21/2013 5:15 PM

I am trying to find out what I need to do to get a "molded cable" to meet the IP67 (dust/waterproofing) requirements. Is there any specific tools that would be required? What would be needed to put a solid backshell on a D-sub connect?

Also, can someone provided me with a good link for some part numbers for different size/types of "molded" backshells? Thank you.

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#3
In reply to #2

Re: Molded Backshells

05/21/2013 5:36 PM

I don't know about IP67. I know about protecting connector wiring by using a potted back shell for satellite and military applications.

I'm not going to try to walk you through this since neither of us seems to understand IP67.

As I said, it's simply a matter of installing a potting shell or dam and filling it with potting compound.

I've used 10 and 30 cc syringes as molds/shells and removed them after cure.

Contact Amphenol and ask them.

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Participant

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#4
In reply to #3

Re: Molded Backshells

05/21/2013 5:45 PM

Thanks for your help. I am familiar with military applications also, but this is honestly the first time I have been asked about the IP 67 requirement. I will contact Amphenol and see what they say.

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#5
In reply to #4

Re: Molded Backshells

05/21/2013 6:19 PM

If you've done military, that will certainly qualify for IP67, top level.

But not knowing the specific requirements makes it difficult to proceed.

IP67, What Does That Mean? - Resource Supply, LLC

Good Luck.

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#7
In reply to #5

Re: Molded Backshells

05/22/2013 4:01 AM

Ingress Protection 67 basically means 'shower-proof' (as in rain shower) and 'dust-proof'.

Definitely not water-immersion proof...

The attempt will mean little, without proper testing and certification (probably EPA).

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#9
In reply to #7

Re: Molded Backshells

05/22/2013 4:00 PM

Ingress Protection 67 basically means 'shower-proof' (as in rain shower) and 'dust-proof'.

Definitely not water-immersion proof...

Definitely the wrong answer, you have just described IP64!

Wiki to the rescue

Take it from someone who used to perform IP certification of products.

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#6

Re: Molded Backshells

05/22/2013 2:52 AM

When in doubt pump it full of silicone.
Del
(seems to work for some actresses)

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#8

Re: Molded Backshells

05/22/2013 6:19 AM

I have recently built a set of injection molds that overmold a custom connector with it's cables fully assembled. I used santoprene synthetic rubber and it is extremely durable, fully water and chemical resistant and amazingly shock proof. These connectors are being used for electrical power connections on new electric vehicles. This may seem like overkill for your requirements, but they will surely exceed the IP67 spec. Any size connector can be done this way, with the exception of some temperature sensitive designs which need to be potted with a chemical curing material rather than a molten injected plastic/rubber.

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#10

Re: Molded Backshells

05/22/2013 5:06 PM

Polyurethane is used for potting underwater cables for ROVs. Done correctly (much cleaning, degreasing, priming first) this is a particularly robust method, suitable to 6000m or more - and far in excess of IP69K.

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#11

Re: Molded Backshells

05/24/2013 7:33 PM

Have you read the procurement spec for 38999?

You can get a copy at: http://www.assistdocs.com/search/search_basic.cfm

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