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  • kunena.thankyou 17 hours ago
  • Martin Gerardp Escobar Angel created a new topic ' Spark leaks at Xlink cable' in the forum.
    Hello Dear Forum,

    Hoping everybody are doing great!!

    I have been getting spark leaks at my Irradiation unit working with Polyolefin compound with a 1.42 density, let me put some key parameters at extrusion and irradiation unit

    Extrusion process
    extruder size 80mm
    line speed 900 mts/min
    x-head average pressure 500 Bars
    RPM's average 30
    sparker settings 2 Kv
    cooling water first stage at 60 C after that water at 27 C

    Irradiation unit

    Ebeam size 800 KeV
    line speed 850 mts/min
    Dosage 7.5 MRad
    Sparker settings 5 Kv ( the cable spec ask for this voltage)

    My main issue is that at extrusion side I have sometimes 1-2 spark leaks but when this cable pass it thru the Irradiation unit these 1-2 sparks became 6-10 spark faults, I checked the outcoming cable temperature (inside the cone pack where cable is coiled) and is around 40 C, so one of my theory is that this high temp are producing in someway those sparks
    I know some units has cooling wire system but they're not very recommended due corrosion and rust of internal chamber of components , has anybody any idea in how to cool down the cable just coming out of E beam and before get into the reel?? I'm very limited with space between devices ( 2 meters) , just thinking on install some high speed air wipes.

    some actions that I did were:

    Adjust spark detector sensibility
    replace some spark detector pieces to fit my process and line speed
    I can't go down in energy on irradiation unit because I can have "non cured " cable
    align all measurement devices
    verify that spark detectors are measuring the right resistance, impedances, etc ( just calibrated)

    Running out of ideas now......90 % of my product needs to be rewinded to segregate the spark faults

    I'd really appreciate the Forum's support for their tips, advices and time to read this Topic

    regards,
    Read More...
    kunena.post 2 days ago
  • Peter J Stewart-Hay replied to the topic 'Magnet Wire Springback Part 2' in the forum.
    Dear Mr. Ajalloueian,

    From now on please do not add questions or other statements to old and archived threads. Instead, start up a new thread. Your action caused confusion and delay. Thank you.

    As far as your question goes, I did contact Mr. Burke but for some reason, he is unavailable. Thus you will just have to be patient.

    I also suggest you talk with a very qualified metallurgical engineer or metallurgist at your local university in order to generate some thought on this issue.
    Read More...
    kunena.post 2 days ago
  • Dear Mr. Ajalloueian,

    From now on please do not add questions or other statements to old and archived threads. Instead, start up a new thread. Your action caused confusion and delay. Thank you.

    As far as your lubricant question goes, you do not want any damage to the magnet wire so keep the temperature as low as possible. Moreover, talk it over with your enamel manufacturer.
    Read More...
    kunena.post 2 days ago
  • I am in the process of developing wire for Strain Gage application. This Strain Gage is welded to a steel truss, or steel rib support ( in deep excavations or tunneling) for measuring internal stress within these structures. I wonder if anyone can advise me which wire material is suitable for this purpose?

    The basic criteria of wire for Strain Gage as follows:
    1) The diameter should be as small as 0.22 mm
    2) The length of the wire approximately 16.5 cm
    3) The wire will be fixed and tensioned at both side and could measure 3000 µε of strain without yielding.

    I would really appreciate any feedback and comments

    Regards,
    Christian Luis
    Read More...
    kunena.post 6 days ago
  • HDG substrates: organic paint coated on galvanized steel sheet obtained product is hot dip galvanized color coated. In addition to hot-dip galvanizing color coated with a protective effect of zinc, organic coating on the surface also played an isolation protection against rust effect, longer life than galvanized plate. The amount of zinc galvanized substrate is generally 180g / m2 (double-sided), the amount of building use galvanized hot dip galvanized substrate of up to 275g / m2.Stainless steel pipe flanges

    Hot galvanized substrate: hot galvanized steel (55% Al-Zn) as a new coated substrate, usually aluminum-containing zinc amount 150g / m (two-sided). Hot galvanized plate is 2-5 times the corrosion resistance of galvanized plate. At temperatures up to 490 ℃ continuous or intermittent use or not heavily oxidized to produce oxide. Ability to reflect heat and light is twice galvanized steel sheet, the reflectance is greater than 0.75 is an ideal energy-saving building materials.Stainless Steel Pipe Fitting Yellow

    Galvanized substrates: electric galvanized sheet for the substrate, coated with organic coating baked income products for color-coated galvanized, electro-galvanized sheet since the zinc thin, usually zinc content of 20 / 20g / m2, so the products are not suitable for use in the production of outdoor walls, roofs and the like. But having a beautiful appearance and excellent processing performance, it can be mainly used in home appliances, audio, steel furniture, interior decoration and so on.Weld steel pipe manufacturer from China
    Read More...
    kunena.post 9 days ago
  • kunena.post 9 days ago
  • Peter J Stewart-Hay created a new topic ' Springback Part 2' in the forum.
    Dear Richard Burke

    Thank you so much for prior information. i increase the anneal temperature and get better result. but i still have this problem
    and hear that our wire is hard and difficult to insert in motor. i did a test on the wire size 0.800 mm grade -2 with 11 enamel passes and the result are: Rp0,2%: 130MPa - Rm (tensile Strength): 240MPa - Elongation: 39%
    what do you think about this result?
    Now i am going to change the dies of my RBD machine. i want to order dies with grain size 25 micron.
    may i know your opinion?
    Read More...
    kunena.post 9 days ago