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Flatten a plastic backflash

Posted: Tue Feb 06, 2018 6:24 pm
by junior
I have a Fireworks. To cover the hammer there is a decorative piece of plastic on the front of the box held by two screws. Over many years of existence the plastic has twisted and cracked so badly the hammer won't work. The only answer I could come up with was to place it on a baking tray in an electric oven on low and heat it up and gradually try to flatten it. It took about 10 minutes in and out and it has eased itself back into a respectable shape, helped by some thumb pressure. So far so good. Hope this helps someone in future. Now you can't learn that from Sainsbury's or Tesco. :D

Re: Flatten a plastic backflash

Posted: Tue Feb 06, 2018 7:08 pm
by badpenny
Good tip that.
Although I believe Waitrose covered it in August :lol:

I believe it has/should have a bulb behind it? So perhaps that helped its distortion?

Re: Flatten a plastic backflash

Posted: Tue Feb 06, 2018 8:15 pm
by scottie
Hi Junior
You could try a hot iron with a damp towel. I did this on a top flash and then after I was finished I put the top flash under a heavy flat surface to cool off and it worked great. I'm sure it would work on the backflash, just being bigger it would take a bit more time.
Scottie

Re: Flatten a plastic backflash

Posted: Tue Feb 06, 2018 8:16 pm
by liquorbox
A cheap heat gun will give heat only to where you need it.
I use one to make birds out of plastic piping and it works well !!CHEERS!!

Re: Flatten a plastic backflash

Posted: Tue Feb 06, 2018 9:49 pm
by junior
Thanks for replies. The plastic is only 3 x 2 inches in size so I wanted to heat the whole of it evenly to get flexibility as it had twisted both ways and had a crack in it. I considered using a heat gun but thought it would be too intense. This piece of plastic has a picture on it and I wasn't sure if it would melt. Done enough, looks OK and hammer works.

Re: Flatten a plastic backflash

Posted: Tue Feb 06, 2018 10:03 pm
by gameswat
JR, old plastic that's been bent & re-flattened has a habit of returning, so after years of messing with this (vintage pins especially) I usually now end up covering the restored originals with thin but tough polycarb clear which does wonders in stopping the process. And the added bonus of UV protection.

Flatten a plastic backflash

Posted: Sun Feb 25, 2018 4:04 pm
by greg
Topic copied, edited and merged from Flatten OW backflash & unidentified tin - Site Admin.

If someone has come up with an innovative new way to flatten the plastic playfield I would love to hear about it. This poor game is unplayable until I find a way to flatten the playfield over the winning holes.

Re: Flatten a plastic backflash

Posted: Sun Feb 25, 2018 4:41 pm
by treefrog
Search the site as many have made attempts at flattening these backflashes, from removing backflash and placing between two sheets and gently applying heat from say a hair dryer, to another member who put his in an oven. I have stopped buying Olly Whales machines and sold all mine last year as not such a fan of this flaw.

Re: Flatten plastic

Posted: Sun Feb 25, 2018 5:03 pm
by greg
DSC01512b.jpg
I have tried flattening a play field with the gentle application of heat from a heat gun with not much luck. I even tried laying a piece of glass over it to distribute the heat evenly. The glass shattered.

The oven scares me. With the heat gun I only screw up one small area at a time. With the oven I can destroy the entire thing in one shot. I'm sure someone has a "Double Secret" way to flatten play fields they have never shared....it's time to share your secret with the world and the world will love you for it!

Re: Flatten a plastic backflash

Posted: Sun Feb 25, 2018 5:04 pm
by junior
Glass will not shatter if it’s toughened glass. Same as oven doors. The plastic I tried to flatten was only 75mm x 50mm and thicker than a sheet of clear backflash. It got hot in electric oven all over enough for me to change its shape.
Took about 5 repeated easing into shape but now it’s OK to go back into the machine.