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Jointing of Cable for Continuous Extrusion

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5 years 7 months ago #2363 by Archived Forum Admin
Hi all,

We have extrusion line with dual pay-off and take-up for multi-core cable outer-extrusion. We need a jointing equipment/method to join multiple batch lengths, to run the extruder non-stop.

Cable diameter - up to 50mm
Cable made of 7, 12, 19... or 61 insulated cores

The joint shall smoothly pass through the tip and die, and shall be easy to make.

Is there a way to join these kind of cables?

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5 years 7 months ago #2364 by Archived Forum Admin
Posts: 1013
Joined: Feb 2004

Hello brn,

OK, I believe this to be a horizontal thermoplastic or moisture cure (Sioplas) extrusion line. (Please try to always provide full information with your questions in future. Thank you.)


1) - I have seen the following procedure successfully done many, many times:

1A) - The outside end of the new cable is prepared by the sheathing operator in advance as follows:
The outer layers of the cable core are cut away and the inner layers are made to form a loop. The overlapped insulated wires at the end of the loop are then very tightly bound with bare copper wire.

1B) - The inside end of the cable presently being sheathed is similarly prepared once available to the operator however:
The prepared end is first looped through the already prepared loop on the outside end of the new cable.

Then the complete splice is wrapped with sticky tape so that it is waterproof. The overall diameter of the splice is smaller in diameter than the core so that the splice can be easily found once it passes through the extrusion line.


2) - Another method is to use two reusable Hubbell Kellems grips and as before some of the outer layers of the cable core are cut away.

See www.hubbell-wiring.com/htm/catalogindex.htm then go to page 638 in the catalog. The data starts on page 639 and you can review this all yourself. You tighten the grips on the remaining core with punch-loc bands (page 650)

As before the complete splice is wrapped with sticky tape so that it is waterproof. The overall diameter of the splice is smaller in diameter than the core so that the splice can be easily found once it passes through the extrusion line.

You will need an inventory of Hubbell Kellems grips and disposable punch-loc bands for this purpose.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212

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5 years 7 months ago #2365 by Archived Forum Admin
Thank you Mr Peter.. As mentioned it is thermoplastic (PVC, PE, HFFR..) sheathing line for instrumentation cables..
since the type of cables vary widely, i think the Hubbell-Kellems grips can help to solve our jointing problem...

thanks again...

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5 years 7 months ago #2366 by Archived Forum Admin
Hello we're using a Buttwelding machine for our process , at this time they have around 3 years working fine and without issues, we uses this because as you we have a dual flyer payoff in our lines and with this we eliminate the setup time between reels , the web direction for this supplier is www.strecker-limburg.de , I hope this information help you, regrads to all forum.

Angel

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