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How exactly does sonically sealing work?

pcgs69pcgs69 Posts: 4,352 ✭✭✭✭
in U.S. Coin Forum
How can a bunch of sound waves "melt" the plastic together?

Comments

  • messydeskmessydesk Posts: 20,280 ✭✭✭✭✭
    The plastic shells vibrate against each other and the heat produced by friction melts them together.
    John
    Keeper of the VAM Catalog • Professional Coin Imaging • Prime Number Set • World Coins in Early America • British Trade Dollars • Variety Attribution
  • PerryHallPerryHall Posts: 46,803 ✭✭✭✭✭
    Actually I think the molecules vibrate causing the plastic to heat until it melts similar to cooking in a microwave oven.

    Worry is the interest you pay on a debt you may not owe.
    "Paper money eventually returns to its intrinsic value---zero."----Voltaire
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  • rickoricko Posts: 98,724 ✭✭✭✭✭
    In the same manner that ultrasonic brazing melts the brazing metal.... high frequency produces heat, fuses the plastic. Cheers, RickO
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    image
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • BearBear Posts: 18,953 ✭✭✭
    I hope that the seal is not injured in
    any way. I like seals and the way they bounce
    balls off their nose.
    There once was a place called
    Camelotimage
  • BECOKABECOKA Posts: 16,961 ✭✭✭
    I was thinking along the microwave thing too. You can tune the waves to an individual thing. Old microwaves were not tuned that well so they got all goofy when you put metal in them where the new ones have the waves tuned in such a way that they ignore the metal grill you can put in for the pot roasts.
  • BECOKABECOKA Posts: 16,961 ✭✭✭


    << <i>I hope that the seal is not injured in
    any way. I like seals and the way they bounce
    balls off their nose. >>



    image
  • RichieURichRichieURich Posts: 8,552 ✭✭✭✭✭


    << <i>I hope that the seal is not injured in
    any way. I like seals and the way they bounce
    balls off their nose. >>



    image

    The method used is a flock of hummingbirds. They hum, of course, because they don't know the words. They hum for awhile, then the Seal appears. However, Heidi Klum stays home babysitting. Seal sings a cover of "Hummingbird", an old Seals and Crofts song, accompanied by the hummingbirds. All of this commotion bothers the coin inside the slab, causing it to shut tightly to keep out the noise.

    An authorized PCGS dealer, and a contributor to the Red Book.

  • charleycharley Posts: 2,071
    Bear, seals also like sound waves and vibrating against each other to make heat. Respectfully, John Curlis
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    image
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • charleycharley Posts: 2,071
    Good one, Broadstruck. You catch on quickly. With Higher Respect, John Curlis
  • pcgs69pcgs69 Posts: 4,352 ✭✭✭✭


    << <i>Good one, Broadstruck. You catch on quickly. With Higher Respect, John Curlis >>



    Careful... Broadstruck sells coins with Ted Danson on them...
  • tmot99tmot99 Posts: 5,238 ✭✭✭
    The seal is not as important as the sticker.
  • charleycharley Posts: 2,071
    Oh, didn't know that...I retract my praise and change my comment to: "bad one,Broadstruck. I am calling GreenPeace because of your lack of sensitivity". No Respect, John Curlis
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    Bears do like Seals!

    Bear does Mrs. Bear play dress-up? image

    image
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • RWBRWB Posts: 8,082 ✭
    The slabs are taken to a sub and sandwich maker called "Sonic" and put in the oven for a while.
  • speetyspeety Posts: 5,424 ✭


    << <i>Bears do like Seals!

    Bear does Mrs. Bear play dress-up? image

    image >>



    That is one of my favorite new video clips!
    Want to buy an auction catalog for the William Hesslein Sale (December 2, 1926). Thanks to all those who have helped us obtain the others!!!

  • clarkbar04clarkbar04 Posts: 4,979 ✭✭✭✭✭
    LOL at lots of things in this thread.

    And, I always wondered how the hell it was OK to have a metal grill in a microwave.
    MS66 taste on an MS63 budget.
  • charleycharley Posts: 2,071
    tmt99, how much does a seal sticker get paid,and is this a taser type thing or a sharp instrument? Also, what makes the sticker more important? If it wasn't for seals there would be no need for seal stickers. Then what would they do, go to work as mercenaries? Respectfully, John Curlis
  • CameonutCameonut Posts: 7,362 ✭✭✭✭✭
    We used to use Branson ultrasonic welders to weld plastic auto parts together. Very reliable technology. You have to make a tool (horn) to hold the parts and focus the sonic energy on the weld joint.

    I don't know exactly what technology is used to seal the PCGS slabs - ultrasonic would be my first guess.

    Here is a link to plastic welding technologies on Bransons website if you want to dig deeper. Plastic Welding

    “In matters of style, swim with the current; in matters of principle, stand like a rock." - Thomas Jefferson

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  • BECOKABECOKA Posts: 16,961 ✭✭✭


    << <i>

    << <i>Bears do like Seals!

    Bear does Mrs. Bear play dress-up? image

    image >>



    That is one of my favorite new video clips! >>



    Looks like that was taken right out of a Japanese reality/comedy show. image
  • RWBRWB Posts: 8,082 ✭
    We used to use Branson ultrasonic welders to weld plastic auto parts together.

    That must be the thing my Jaguar mechanic uses to fix the car – every other week.
  • badgerbadger Posts: 1,217 ✭✭✭
    I agree with Cameonut. I believe that an ultrasonic horn is used to focus the energy to the seal area of the plastic.

    Dave
    Collector of Modern Silver Proofs 1950-1964 -- PCGS Registry as Elite Cameo

    Link to 1950 - 1964 Proof Registry Set
    1938 - 1964 Proof Jeffersons w/ Varieties
  • droopyddroopyd Posts: 5,381 ✭✭✭


    << <i>How can a bunch of sound waves "melt" the plastic together? >>



    Same way your microwave oven works.
    Me at the Springfield coin show:
    image
    60 years into this hobby and I'm still working on my Lincoln set!
  • seatedcoinsseatedcoins Posts: 1,096 ✭
    Ask a self-slabber and they would would say superglue causes the bond.
    Trustworthy BST sellers: cucamongacoin
  • nickelnickel Posts: 662
    don't know about that microwave thing .
    my frozen dinner is hot inside , but the
    plastic film pulls right off of the plastic tray!
    no heat seal there .
    also ,i tried that vibrating thing .
    went to sears paint department and
    used one of them coin world holders ,
    and stuck it into that shaky/vibrating
    paint mixing machine . it shook and
    vibrated for like four minutes .
    released the clamp and the danged
    holder just feel apart and my nickel
    rolled and dissappeared under one
    of the shelves !
    Home of quality widgets

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